chore(xep): Move FAST from staging into xep_0484.dart

Reviewed-on: https://codeberg.org/moxxy/moxxmpp/pulls/49

.gitlint

@@ -7,7 +7,7 @@ line-length=72
 [title-trailing-punctuation]
 [title-hard-tab]
 [title-match-regex]
-regex=^((feat|fix|chore|refactor|docs|release|test)\((meta|tests|style|docs|xep|core|example)+(,(meta|tests|style|docs|xep|core|example))*\)|release): [A-Z0-9].*$
+regex=^((feat|fix|chore|refactor|docs|release|test)\((meta|tests|style|docs|xep|core|example|all|flake|ci)+(,(meta|tests|style|docs|xep|core|example|all|flake|ci))*\)|release): [A-Z0-9].*$
 
 
 [body-trailing-whitespace]

.woodpecker.yml

@@ -1,28 +1,49 @@
+when:
+  branch: master
+
 pipeline:
   # Check moxxmpp
   moxxmpp-lint:
-    image: dart:2.18.1
+    image: dart:3.0.7
     commands:
       - cd packages/moxxmpp
-      - dart pub get
+      # Proxy requests to pub.dev using pubcached
+      - PUB_HOSTED_URL=http://172.17.0.1:8000 dart pub get
       - dart analyze --fatal-infos --fatal-warnings
+
   moxxmpp-test:
-    image: dart:2.18.1
+    image: dart:3.0.7
     commands:
       - cd packages/moxxmpp
-      - dart pub get
+      # Proxy requests to pub.dev using pubcached
+      - PUB_HOSTED_URL=http://172.17.0.1:8000 dart pub get
       - dart test
 
   # Check moxxmpp_socket_tcp
   moxxmpp_socket_tcp-lint:
-    image: dart:2.18.1
+    image: dart:3.0.7
     commands:
       - cd packages/moxxmpp_socket_tcp
-      - dart pub get
+      # Proxy requests to pub.dev using pubcached
+      - PUB_HOSTED_URL=http://172.17.0.1:8000 dart pub get
       - dart analyze --fatal-infos --fatal-warnings
+
   # moxxmpp-test:
-  #   image: dart:2.18.1
+  #   image: dart:3.0.7
   #   commands:
   #     - cd packages/moxxmpp
-  #     - dart pub get
+  #     # Proxy requests to pub.dev using pubcached
+  #     - PUB_HOSTED_URL=http://172.17.0.1:8000 dart pub get
   #     - dart test
+
+  notify:
+    image: git.polynom.me/papatutuwawa/woodpecker-xmpp
+    settings:
+      xmpp_tls: 1
+      xmpp_is_muc: 1
+      xmpp_recipient: moxxy-build@muc.moxxy.org
+      xmpp_alias: 2Bot
+    secrets: [ xmpp_jid, xmpp_password, xmpp_server ]
+    when:
+      status:
+        - failure

README.md

@@ -7,7 +7,7 @@ moxxmpp is a XMPP library written purely in Dart for usage in Moxxy.
 
 This package contains the actual XMPP code that is platform-independent.
 
-Documentation is available [here](https://moxxy.org/developers/docs/moxxmpp/).
+Documentation is available [here](https://docs.moxxy.org/moxxmpp/index.html).
 
 ### [moxxmpp_socket_tcp](./packages/moxxmpp_socket_tcp)
 
@@ -15,6 +15,10 @@ Documentation is available [here](https://moxxy.org/developers/docs/moxxmpp/).
 implements the RFC6120 connection algorithm and XEP-0368 direct TLS connections,
 if a DNS implementation is given, and supports StartTLS.
 
+### moxxmpp_color
+
+Implementation of [XEP-0392](https://xmpp.org/extensions/xep-0392.html).
+
 ## Development
 
 To begin, use [melos](https://github.com/invertase/melos) to bootstrap the project: `melos bootstrap`. Then, the example

examples_dart/bin/component.dart

@@ -3,6 +3,8 @@ import 'package:moxxmpp/moxxmpp.dart';
 import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
 
 class TestingTCPSocketWrapper extends TCPSocketWrapper {
+  TestingTCPSocketWrapper() : super(true);
+
   @override
   bool onBadCertificate(dynamic certificate, String domain) {
     return true;
@@ -30,24 +32,26 @@ class EchoMessageManager extends XmppManagerBase {
     StanzaHandlerData state,
   ) async {
     final body = stanza.firstTag('body');
-    if (body == null) return state.copyWith(done: true);
+    if (body == null) return state..done = true;
 
     final bodyText = body.innerText();
 
     await getAttributes().sendStanza(
-      Stanza.message(
-        to: stanza.from,
-        children: [
-          XMLNode(
-            tag: 'body',
-            text: 'Hello, ${stanza.from}! You said "$bodyText"',
-          ),
-        ],
+      StanzaDetails(
+        Stanza.message(
+          to: stanza.from,
+          children: [
+            XMLNode(
+              tag: 'body',
+              text: 'Hello, ${stanza.from}! You said "$bodyText"',
+            ),
+          ],
+        ),
+        awaitable: false,
       ),
-      awaitable: false,
     );
 
-    return state.copyWith(done: true);
+    return state..done = true;
   }
 }
 

examples_dart/bin/muc_client.dart

@@ -0,0 +1,111 @@
+import 'package:cli_repl/cli_repl.dart';
+import 'package:example_dart/arguments.dart';
+import 'package:example_dart/socket.dart';
+import 'package:logging/logging.dart';
+import 'package:moxxmpp/moxxmpp.dart';
+
+void main(List<String> args) async {
+  // Set up logging
+  Logger.root.level = Level.ALL;
+  Logger.root.onRecord.listen((record) {
+    // ignore: avoid_print
+    print(
+      '[${record.level.name}] (${record.loggerName}) ${record.time}: ${record.message}',
+    );
+  });
+
+  final parser = ArgumentParser()
+    ..parser.addOption('muc', help: 'The MUC to send messages to')
+    ..parser.addOption('nick', help: 'The nickname with which to join the MUC');
+  final options = parser.handleArguments(args);
+  if (options == null) {
+    return;
+  }
+
+  // Connect
+  final muc = JID.fromString(options['muc']! as String).toBare();
+  final nick = options['nick']! as String;
+  final connection = XmppConnection(
+    TestingReconnectionPolicy(),
+    AlwaysConnectedConnectivityManager(),
+    ClientToServerNegotiator(),
+    ExampleTCPSocketWrapper(parser.srvRecord),
+  )..connectionSettings = parser.connectionSettings;
+
+  // Register the managers and negotiators
+  await connection.registerManagers([
+    PresenceManager(),
+    DiscoManager([]),
+    PubSubManager(),
+    MessageManager(),
+    StableIdManager(),
+    MUCManager(),
+  ]);
+  await connection.registerFeatureNegotiators([
+    SaslPlainNegotiator(),
+    ResourceBindingNegotiator(),
+    StartTlsNegotiator(),
+    SaslScramNegotiator(10, '', '', ScramHashType.sha1),
+  ]);
+
+  // Connect
+  Logger.root.info('Connecting...');
+  final result =
+      await connection.connect(shouldReconnect: false, waitUntilLogin: true);
+  if (!result.isType<bool>()) {
+    Logger.root.severe('Authentication failed!');
+    return;
+  }
+  Logger.root.info('Connected.');
+
+  // Print received messages.
+  connection
+      .asBroadcastStream()
+      .where((event) => event is MessageEvent)
+      .listen((event) {
+    event as MessageEvent;
+
+    // Ignore messages with no <body />
+    final body = event.get<MessageBodyData>()?.body;
+    if (body == null) {
+      return;
+    }
+
+    print('=====> [${event.from}] $body');
+  });
+
+  // Join room
+  final mm = connection.getManagerById<MUCManager>(mucManager)!;
+  await mm.joinRoom(
+    muc,
+    nick,
+    maxHistoryStanzas: 0,
+  );
+  final state = (await mm.getRoomState(muc))!;
+
+  print('=====> ${state.members.length} users in room');
+  print('=====> ${state.members.values.map((m) => m.nick).join(", ")}');
+
+  final repl = Repl(prompt: '> ');
+  await for (final line in repl.runAsync()) {
+    await connection
+        .getManagerById<MessageManager>(messageManager)!
+        .sendMessage(
+            muc,
+            TypedMap<StanzaHandlerExtension>.fromList([
+              MessageBodyData(line),
+              StableIdData(
+                // NOTE: Don't do this. Use a UUID.
+                DateTime.now().millisecondsSinceEpoch.toString(),
+                null,
+              ),
+            ]),
+            type: 'groupchat');
+  }
+
+  // Leave room
+  await connection.getManagerById<MUCManager>(mucManager)!.leaveRoom(muc);
+
+  // Disconnect
+  await connection.disconnect();
+}

examples_dart/bin/omemo_client.dart

@@ -0,0 +1,116 @@
+import 'package:chalkdart/chalk.dart';
+import 'package:cli_repl/cli_repl.dart';
+import 'package:example_dart/arguments.dart';
+import 'package:example_dart/socket.dart';
+import 'package:logging/logging.dart';
+import 'package:moxxmpp/moxxmpp.dart';
+import 'package:omemo_dart/omemo_dart.dart' as omemo;
+
+void main(List<String> args) async {
+  // Set up logging
+  Logger.root.level = Level.ALL;
+  Logger.root.onRecord.listen((record) {
+    // ignore: avoid_print
+    print(
+      '[${record.level.name}] (${record.loggerName}) ${record.time}: ${record.message}',
+    );
+  });
+
+  final parser = ArgumentParser()
+    ..parser.addOption('to', help: 'The JID to send messages to');
+  final options = parser.handleArguments(args);
+  if (options == null) {
+    return;
+  }
+
+  // Connect
+  final jid = parser.jid;
+  final to = JID.fromString(options['to']! as String).toBare();
+  final connection = XmppConnection(
+    TestingReconnectionPolicy(),
+    AlwaysConnectedConnectivityManager(),
+    ClientToServerNegotiator(),
+    ExampleTCPSocketWrapper(parser.srvRecord, true),
+  )..connectionSettings = parser.connectionSettings;
+
+  // Generate OMEMO data
+  omemo.OmemoManager? oom;
+  final moxxmppOmemo = OmemoManager(
+    () async => oom!,
+    (toJid, _) async => toJid == to,
+  );
+  oom = omemo.OmemoManager(
+    await omemo.OmemoDevice.generateNewDevice(jid.toString(), opkAmount: 5),
+    omemo.BlindTrustBeforeVerificationTrustManager(),
+    moxxmppOmemo.sendEmptyMessageImpl,
+    moxxmppOmemo.fetchDeviceList,
+    moxxmppOmemo.fetchDeviceBundle,
+    moxxmppOmemo.subscribeToDeviceListImpl,
+    moxxmppOmemo.publishDeviceImpl,
+  );
+  final deviceId = await oom.getDeviceId();
+  Logger.root.info('Our device id: $deviceId');
+
+  // Register the managers and negotiators
+  await connection.registerManagers([
+    PresenceManager(),
+    DiscoManager([]),
+    PubSubManager(),
+    MessageManager(),
+    moxxmppOmemo,
+  ]);
+  await connection.registerFeatureNegotiators([
+    SaslPlainNegotiator(),
+    ResourceBindingNegotiator(),
+    StartTlsNegotiator(),
+    SaslScramNegotiator(10, '', '', ScramHashType.sha1),
+  ]);
+
+  // Set up event handlers
+  connection.asBroadcastStream().listen((event) {
+    if (event is MessageEvent) {
+      Logger.root.info(event.id);
+      Logger.root.info(event.extensions.keys.toList());
+
+      final body = event.encryptionError != null
+          ? chalk.red('Failed to decrypt message: ${event.encryptionError}')
+          : chalk.green(event.get<MessageBodyData>()?.body ?? '');
+      print('[${event.from.toString()}] $body');
+    }
+  });
+
+  // Connect
+  Logger.root.info('Connecting...');
+  final result =
+      await connection.connect(shouldReconnect: false, waitUntilLogin: true);
+  if (!result.isType<bool>()) {
+    Logger.root.severe('Authentication failed!');
+    return;
+  }
+  Logger.root.info('Connected.');
+
+  // Publish our bundle
+  Logger.root.info('Publishing bundle');
+  final device = await oom.getDevice();
+  final omemoResult = await moxxmppOmemo.publishBundle(await device.toBundle());
+  if (!omemoResult.isType<bool>()) {
+    Logger.root.severe(
+        'Failed to publish OMEMO bundle: ${omemoResult.get<OmemoError>()}');
+    return;
+  }
+
+  final repl = Repl(prompt: '> ');
+  await for (final line in repl.runAsync()) {
+    await connection
+        .getManagerById<MessageManager>(messageManager)!
+        .sendMessage(
+          to,
+          TypedMap<StanzaHandlerExtension>.fromList([
+            MessageBodyData(line),
+          ]),
+        );
+  }
+
+  // Disconnect
+  await connection.disconnect();
+}

examples_dart/bin/simple_client.dart

@@ -0,0 +1,112 @@
+import 'package:logging/logging.dart';
+import 'package:moxxmpp/moxxmpp.dart';
+import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
+
+/// The JID we want to authenticate as.
+final xmppUser = JID.fromString('jane@example.com');
+
+/// The password to authenticate with.
+const xmppPass = 'secret';
+
+/// The [xmppHost]:[xmppPort] server address to connect to.
+/// In a real application, one might prefer to use [TCPSocketWrapper]
+/// with a custom DNS implementation to let moxxmpp resolve the XMPP
+/// server's address automatically. However, if we just provide a host
+/// and a port, then [TCPSocketWrapper] will just skip the resolution and
+/// immediately use the provided connection details.
+const xmppHost = 'localhost';
+const xmppPort = 5222;
+
+void main(List<String> args) async {
+  Logger.root.level = Level.ALL;
+  Logger.root.onRecord.listen((record) {
+    print('${record.level.name}|${record.time}: ${record.message}');
+  });
+
+  // This class manages every aspect of handling the XMPP stream.
+  final connection = XmppConnection(
+    // A reconnection policy tells the connection how to handle an error
+    // while or after connecting to the server. The [TestingReconnectionPolicy]
+    // immediately triggers a reconnection. In a real implementation, one might
+    // prefer to use a smarter strategy, like using an exponential backoff.
+    TestingReconnectionPolicy(),
+
+    // A connectivity manager tells the connection when it can connect. This is to
+    // ensure that we're not constantly trying to reconnect because we have no
+    // Internet connection. [AlwaysConnectedConnectivityManager] always says that
+    // we're connected. In a real application, one might prefer to use a smarter
+    // strategy, like using connectivity_plus to query the system's network connectivity
+    // state.
+    AlwaysConnectedConnectivityManager(),
+
+    // This kind of negotiator tells the connection how to handle the stream
+    // negotiations. The [ClientToServerNegotiator] allows to connect to the server
+    // as a regular client. Another negotiator would be the [ComponentToServerNegotiator] that
+    // allows for connections to the server where we're acting as a component.
+    ClientToServerNegotiator(),
+
+    // A wrapper around any kind of connection. In this case, we use the [TCPSocketWrapper], which
+    // uses a dart:io Socket/SecureSocket to connect to the server. If you want, you can also
+    // provide your own socket to use, for example, WebSockets or any other connection
+    // mechanism.
+    TCPSocketWrapper(false),
+  )..connectionSettings = ConnectionSettings(
+      jid: xmppUser,
+      password: xmppPass,
+      host: xmppHost,
+      port: xmppPort,
+    );
+
+  // Register a set of "managers" that provide you with implementations of various
+  // XEPs. Some have interdependencies, which need to be met. However, this example keeps
+  // it simple and just registers a [MessageManager], which has no required dependencies.
+  await connection.registerManagers([
+    // The [MessageManager] handles receiving and sending <message /> stanzas.
+    MessageManager(),
+  ]);
+
+  // Feature negotiators are objects that tell the connection negotiator what stream features
+  // we can negotiate and enable. moxxmpp negotiators always try to enable their features.
+  await connection.registerFeatureNegotiators([
+    // This negotiator authenticates to the server using SASL PLAIN with the provided
+    // credentials.
+    SaslPlainNegotiator(),
+    // This negotiator attempts to bind a resource. By default, it's always a random one.
+    ResourceBindingNegotiator(),
+    // This negotiator attempts to do StartTLS before authenticating.
+    StartTlsNegotiator(),
+  ]);
+
+  // Set up a stream handler for the connection's event stream. Managers and negotiators
+  // may trigger certain events. The [MessageManager], for example, triggers a [MessageEvent]
+  // whenever a message is received. If other managers are registered that parse a message's
+  // contents, then they can add their data to the event.
+  connection.asBroadcastStream().listen((event) {
+    if (event is! MessageEvent) {
+      return;
+    }
+
+    // The text body (contents of the <body /> element) are returned as a
+    // [MessageBodyData] object. However, a message does not have to contain a
+    // body, so it is nullable.
+    final body = event.extensions.get<MessageBodyData>()?.body;
+    print('[<-- ${event.from}] $body');
+  });
+
+  // Connect to the server.
+  final result = await connection.connect(
+    // This flag indicates that we want to reconnect in case something happens.
+    shouldReconnect: true,
+    // This flag indicates that we want the returned Future to only resolve
+    // once the stream negotiations are done and no negotiator has any feature left
+    // to negotiate.
+    waitUntilLogin: true,
+  );
+
+  // Check if the connection was successful. [connection.connect] can return a boolean
+  // to indicate success or a [XmppError] in case the connection attempt failed.
+  if (!result.isType<bool>()) {
+    print('Failed to connect to server');
+    return;
+  }
+}

examples_dart/lib/arguments.dart

@@ -0,0 +1,84 @@
+import 'package:args/args.dart';
+import 'package:chalkdart/chalk.dart';
+import 'package:moxxmpp/moxxmpp.dart';
+import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
+
+extension StringToInt on String {
+  int toInt() => int.parse(this);
+}
+
+/// A wrapper around [ArgParser] for providing convenience functions and standard parameters
+/// to the examples.
+class ArgumentParser {
+  ArgumentParser() {
+    parser
+      ..addOption('jid', help: 'The JID to connect as')
+      ..addOption('password', help: 'The password to use for authenticating')
+      ..addOption('host',
+          help:
+              'The host address to connect to (By default uses the domain part of the JID)')
+      ..addOption('port', help: 'The port to connect to')
+      ..addOption('xmpps-srv',
+          help:
+              'Inject a SRV record for _xmpps-client._tcp. Format: <priority>,<weight>,<target>,<port>')
+      ..addFlag('help',
+          abbr: 'h',
+          negatable: false,
+          defaultsTo: false,
+          help: 'Show this help text');
+  }
+
+  /// The [ArgParser] that handles parsing the arguments.
+  final ArgParser parser = ArgParser();
+
+  /// The parsed options. Only valid after calling [handleArguments].
+  late ArgResults options;
+
+  ArgResults? handleArguments(List<String> args) {
+    options = parser.parse(args);
+    if (options['help']!) {
+      print(parser.usage);
+      return null;
+    }
+
+    if (options['jid'] == null) {
+      print(chalk.red('No JID specified'));
+      print(parser.usage);
+      return null;
+    }
+
+    if (options['password'] == null) {
+      print(chalk.red('No password specified'));
+      print(parser.usage);
+      return null;
+    }
+
+    return options;
+  }
+
+  /// The JID to connect as.
+  JID get jid => JID.fromString(options['jid']!).toBare();
+
+  /// Construct connection settings from the parsed options.
+  ConnectionSettings get connectionSettings => ConnectionSettings(
+        jid: jid,
+        password: options['password']!,
+        host: options['host'],
+        port: (options['port'] as String?)?.toInt(),
+      );
+
+  /// Construct an xmpps-client SRV record for injection, if specified.
+  MoxSrvRecord? get srvRecord {
+    if (options['xmpps-srv'] == null) {
+      return null;
+    }
+
+    final parts = options['xmpps-srv']!.split(',');
+    return MoxSrvRecord(
+      int.parse(parts[0]),
+      int.parse(parts[1]),
+      parts[2],
+      int.parse(parts[3]),
+    );
+  }
+}

examples_dart/lib/socket.dart

@@ -0,0 +1,22 @@
+import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
+
+/// A simple socket for examples that allows injection of SRV records (since
+/// we cannot use moxdns here).
+class ExampleTCPSocketWrapper extends TCPSocketWrapper {
+  ExampleTCPSocketWrapper(this.srvRecord, bool logData) : super(logData);
+
+  /// A potential SRV record to inject for testing.
+  final MoxSrvRecord? srvRecord;
+
+  @override
+  bool onBadCertificate(dynamic certificate, String domain) {
+    return true;
+  }
+
+  @override
+  Future<List<MoxSrvRecord>> srvQuery(String domain, bool dnssec) async {
+    return [
+      if (srvRecord != null) srvRecord!,
+    ];
+  }
+}

examples_dart/pubspec.yaml

@@ -1,25 +1,34 @@
 name: example_dart
-description: A sample command-line application.
+description: A collection of samples for moxxmpp.
 version: 1.0.0
-# homepage: https://www.example.com
 
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: '>=3.0.0 <4.0.0'
 
 dependencies:
+  args: 2.4.1
+  chalkdart: 2.0.9
+  cli_repl: 0.2.3
   logging: ^1.0.2
   moxxmpp:
     hosted: https://git.polynom.me/api/packages/Moxxy/pub
-    version: 0.3.1
+    version: 0.4.0
   moxxmpp_socket_tcp:
     hosted: https://git.polynom.me/api/packages/Moxxy/pub
-    version: 0.3.1
+    version: 0.4.0
+  omemo_dart:
+    hosted: https://git.polynom.me/api/packages/PapaTutuWawa/pub
+    version: ^0.5.1
 
 dependency_overrides:
   moxxmpp:
     path: ../packages/moxxmpp
   moxxmpp_socket_tcp:
     path: ../packages/moxxmpp_socket_tcp
+  omemo_dart:
+    git:
+      url: https://github.com/PapaTutuWawa/omemo_dart.git
+      rev: 49c7e114e6cf80dcde55fbbd218bba3182045862
     
 dev_dependencies:
   lints: ^2.0.0

flake.lock

@@ -1,12 +1,74 @@
 {
   "nodes": {
-    "flake-utils": {
+    "android-nixpkgs": {
+      "inputs": {
+        "devshell": "devshell",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      },
       "locked": {
-        "lastModified": 1678901627,
-        "narHash": "sha256-U02riOqrKKzwjsxc/400XnElV+UtPUQWpANPlyazjH0=",
+        "lastModified": 1727554699,
+        "narHash": "sha256-puBCNL5PW7Pej+6Srmi2YjEgNeE015NFe33hbkkLqeQ=",
+        "owner": "tadfisher",
+        "repo": "android-nixpkgs",
+        "rev": "bc34ef1c71fe9eafcfb1d637b431fca83d746625",
+        "type": "github"
+      },
+      "original": {
+        "owner": "tadfisher",
+        "repo": "android-nixpkgs",
+        "type": "github"
+      }
+    },
+    "devshell": {
+      "inputs": {
+        "nixpkgs": [
+          "android-nixpkgs",
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1722113426,
+        "narHash": "sha256-Yo/3loq572A8Su6aY5GP56knpuKYRvM2a1meP9oJZCw=",
+        "owner": "numtide",
+        "repo": "devshell",
+        "rev": "67cce7359e4cd3c45296fb4aaf6a19e2a9c757ae",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "devshell",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1726560853,
+        "narHash": "sha256-X6rJYSESBVr3hBoH0WbKE5KvhPU5bloyZ2L4K60/fPQ=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "93a2b84fc4b70d9e089d029deacc3583435c2ed6",
+        "rev": "c1dfcf08411b08f6b8615f7d8971a2bfa81d5e8a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "flake-utils_2": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1692799911,
+        "narHash": "sha256-3eihraek4qL744EvQXsK1Ha6C3CR7nnT8X2qWap4RNk=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "f9e7cf818399d17d347f847525c5a5a8032e4e44",
         "type": "github"
       },
       "original": {
@@ -17,27 +79,27 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1676076353,
-        "narHash": "sha256-mdUtE8Tp40cZETwcq5tCwwLqkJVV1ULJQ5GKRtbshag=",
-        "owner": "AtaraxiaSjel",
+        "lastModified": 1727348695,
+        "narHash": "sha256-J+PeFKSDV+pHL7ukkfpVzCOO7mBSrrpJ3svwBFABbhI=",
+        "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "5deb99bdccbbb97e7562dee4ba8a3ee3021688e6",
+        "rev": "1925c603f17fc89f4c8f6bf6f631a802ad85d784",
         "type": "github"
       },
       "original": {
-        "owner": "AtaraxiaSjel",
-        "ref": "update/flutter",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }
     },
-    "nixpkgs-unstable": {
+    "nixpkgs_2": {
       "locked": {
-        "lastModified": 1680273054,
-        "narHash": "sha256-Bs6/5LpvYp379qVqGt9mXxxx9GSE789k3oFc+OAL07M=",
+        "lastModified": 1727586919,
+        "narHash": "sha256-e/YXG0tO5GWHDS8QQauj8aj4HhXEm602q9swrrlTlKQ=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "3364b5b117f65fe1ce65a3cdd5612a078a3b31e3",
+        "rev": "2dcd9c55e8914017226f5948ac22c53872a13ee2",
         "type": "github"
       },
       "original": {
@@ -49,9 +111,39 @@
     },
     "root": {
       "inputs": {
-        "flake-utils": "flake-utils",
-        "nixpkgs": "nixpkgs",
-        "nixpkgs-unstable": "nixpkgs-unstable"
+        "android-nixpkgs": "android-nixpkgs",
+        "flake-utils": "flake-utils_2",
+        "nixpkgs": "nixpkgs_2"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "systems_2": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
       }
     }
   },

flake.nix

@@ -1,22 +1,20 @@
 {
   description = "moxxmpp";
   inputs = {
-    nixpkgs.url = "github:AtaraxiaSjel/nixpkgs/update/flutter";
-    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    android-nixpkgs.url = "github:tadfisher/android-nixpkgs";
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, flake-utils }: flake-utils.lib.eachDefaultSystem (system: let
-    pkgs = import nixpkgs {
+  outputs = { self, nixpkgs, android-nixpkgs, flake-utils }: flake-utils.lib.eachDefaultSystem (system: let
+     pkgs = import nixpkgs {
       inherit system;
       config = {
         android_sdk.accept_license = true;
         allowUnfree = true;
       };
     };
-    unstable = import nixpkgs-unstable {
-      inherit system;
-    };
+    # Everything to make Flutter happy
     android = pkgs.androidenv.composeAndroidPackages {
       # TODO: Find a way to pin these
       #toolsVersion = "26.1.1";
@@ -33,6 +31,7 @@
       useGoogleAPIs = false;
       useGoogleTVAddOns = false;
     };
+    lib = pkgs.lib;
     pinnedJDK = pkgs.jdk17;
 
     pythonEnv = pkgs.python3.withPackages (ps: with ps; [
@@ -51,7 +50,7 @@
     };
 
     devShell = let
-      prosody-newer-community-modules = unstable.prosody.overrideAttrs (old: {
+      prosody-newer-community-modules = pkgs.prosody.overrideAttrs (old: {
         communityModules = pkgs.fetchhg {
           url = "https://hg.prosody.im/prosody-modules";
           rev = "e3a3a6c86a9f";
@@ -103,7 +102,26 @@
       CPATH = "${pkgs.xorg.libX11.dev}/include:${pkgs.xorg.xorgproto}/include";
       LD_LIBRARY_PATH = with pkgs; lib.makeLibraryPath [ atk cairo epoxy gdk-pixbuf glib gtk3 harfbuzz pango ];
 
+      ANDROID_SDK_ROOT = "${android.androidsdk}/share/android-sdk";
+      ANDROID_HOME = "${android.androidsdk}/share/android-sdk";
       JAVA_HOME = pinnedJDK;
+
+      # Fix an issue with Flutter using an older version of aapt2, which does not know
+      # an used parameter.
+      GRADLE_OPTS = "-Dorg.gradle.project.android.aapt2FromMavenOverride=${android.androidsdk}/share/android-sdk/build-tools/34.0.0/aapt2";
+    };
+
+    apps = {
+      regenerateNixPackage = let
+        script = pkgs.writeShellScript "regenerate-nix-package.sh" ''
+          set -e
+          ${pythonEnv}/bin/python ./scripts/pubspec2lock.py ./packages/moxxmpp/pubspec.lock ./nix/moxxmpp.lock
+          ${pythonEnv}/bin/python ./scripts/lock2nix.py ./nix/moxxmpp.lock ./nix/pubcache.moxxmpp.nix moxxmpp
+        '';
+      in {
+        type = "app";
+        program = "${script}";
+      };
     };
   });
 }

integration_tests/create_users.sh

@@ -0,0 +1,4 @@
+set -ex
+
+prosodyctl --config ./prosody.cfg.lua register testuser1 localhost abc123
+prosodyctl --config ./prosody.cfg.lua register testuser2 localhost abc123

integration_tests/pubspec.yaml

@@ -3,14 +3,16 @@ description: A sample command-line application.
 version: 1.0.0
 
 environment:
-  sdk: '>=2.18.0 <3.0.0'
+  sdk: ">=3.0.0 <4.0.0"
 
 dependencies:
-  logging: ^1.0.2
-  moxxmpp: 0.3.0
-  moxxmpp_socket_tcp: 0.3.0
+  logging: ^1.3.0
+  moxxmpp:
+    path: ../packages/moxxmpp
+  moxxmpp_socket_tcp:
+    path: ../packages/moxxmpp_socket_tcp
 
 dev_dependencies:
-  lints: ^2.0.0
-  test: ^1.16.0
-  very_good_analysis: ^3.0.1
+  build_runner: ^2.4.13
+  test: ^1.25.8
+  very_good_analysis: ^6.0.0

integration_tests/test/component_test.dart

@@ -4,6 +4,8 @@ import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
 import 'package:test/test.dart';
 
 class TestingTCPSocketWrapper extends TCPSocketWrapper {
+  TestingTCPSocketWrapper() : super(true);
+
   @override
   bool onBadCertificate(dynamic certificate, String domain) {
     return true;

integration_tests/test/sasl2_test.dart

@@ -4,6 +4,8 @@ import 'package:moxxmpp_socket_tcp/moxxmpp_socket_tcp.dart';
 import 'package:test/test.dart';
 
 class TestingTCPSocketWrapper extends TCPSocketWrapper {
+  TestingTCPSocketWrapper() : super(true);
+
   @override
   bool onBadCertificate(dynamic certificate, String domain) {
     return true;
@@ -27,7 +29,7 @@ void main() {
       ClientToServerNegotiator(),
       TestingTCPSocketWrapper(),
     )..connectionSettings = ConnectionSettings(
-        jid: JID.fromString('testuser@localhost'),
+        jid: JID.fromString('testuser1@localhost'),
         password: 'abc123',
         host: '127.0.0.1',
         port: 5222,
@@ -40,17 +42,18 @@ void main() {
     ]);
     await conn.registerFeatureNegotiators([
       SaslPlainNegotiator(),
+      SaslScramNegotiator(9, '', '', ScramHashType.sha1),
+      SaslScramNegotiator(10, '', '', ScramHashType.sha256),
       ResourceBindingNegotiator(),
       FASTSaslNegotiator(),
       Bind2Negotiator(),
       StartTlsNegotiator(),
-      Sasl2Negotiator(
-        userAgent: const UserAgent(
+      Sasl2Negotiator()
+        ..userAgent = const UserAgent(
           id: 'd4565fa7-4d72-4749-b3d3-740edbf87770',
           software: 'moxxmpp',
           device: "PapaTutuWawa's awesome device",
         ),
-      ),
     ]);
 
     final result = await conn.connect(

nix/pubcache.moxxmpp.nix

@@ -1,28 +1,30 @@
+# GENERATED BY LOCK2NIX.py
+# DO NOT EDIT BY HAND
 {fetchzip, runCommand} : rec {
   _fe_analyzer_shared = fetchzip {
-    sha256 = "1hyd5pmjcfyvfwhsc0wq6k0229abmqq5zn95g31hh42bklb2gci5";
-    url = "https://pub.dartlang.org/packages/_fe_analyzer_shared/versions/50.0.0.tar.gz";
+    sha256 = "15fh9ka41dw4qsynv07msq4i243fibprcmafdygw5x88f7m55fq3";
+    url = "https://pub.dartlang.org/packages/_fe_analyzer_shared/versions/61.0.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   analyzer = fetchzip {
-    sha256 = "0niy5b3w39aywpjpw5a84pxdilhh3zzv1c22x8ywml756pybmj4r";
-    url = "https://pub.dartlang.org/packages/analyzer/versions/5.2.0.tar.gz";
+    sha256 = "0w604zngxwfx0xqxvhbxrhdh04wgm6ad6a1lbwnyvmk57amv44np";
+    url = "https://pub.dartlang.org/packages/analyzer/versions/5.13.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   args = fetchzip {
-    sha256 = "0c78zkzg2d2kzw1qrpiyrj1qvm4pr0yhnzapbqk347m780ha408g";
-    url = "https://pub.dartlang.org/packages/args/versions/2.3.1.tar.gz";
+    sha256 = "01ps253280c6dbx0vncw4wga4l2qp1zx779qjj2x06xzb3744zbz";
+    url = "https://pub.dartlang.org/packages/args/versions/2.4.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   async = fetchzip {
-    sha256 = "00hhylamsjcqmcbxlsrfimri63gb384l31r9mqvacn6c6bvk4yfx";
-    url = "https://pub.dartlang.org/packages/async/versions/2.10.0.tar.gz";
+    sha256 = "0hfgvjajp5c2mw68186hgrk9v5zjhhi149hlhl0fap274p2v1g3q";
+    url = "https://pub.dartlang.org/packages/async/versions/2.11.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -49,29 +51,29 @@
   };
 
   build_daemon = fetchzip {
-    sha256 = "0b6hnwjc3gi5g7cnpy8xyiqigcrs0xp51c7y7v1pqn9v75g25w6j";
-    url = "https://pub.dartlang.org/packages/build_daemon/versions/3.1.0.tar.gz";
+    sha256 = "1wn7bq846vgdj62bkh9h25l95xdsndv0jdyw52nyr0591l3bpg3h";
+    url = "https://pub.dartlang.org/packages/build_daemon/versions/3.1.1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   build_resolvers = fetchzip {
-    sha256 = "0fnrisgq6rnvbqsf8v43hb11kr1qq6azrxbsvx3wwimd37nxx8m5";
-    url = "https://pub.dartlang.org/packages/build_resolvers/versions/2.1.0.tar.gz";
+    sha256 = "00h9abhrfmnl0xxziyf6p68sxnbv2ww1c4dhgpnz00mzbmamnq5c";
+    url = "https://pub.dartlang.org/packages/build_resolvers/versions/2.3.1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   build_runner = fetchzip {
-    sha256 = "0246bxl9rxgil55fhfzi7csd9a56blj9s1j1z79717hiyzsr60x6";
-    url = "https://pub.dartlang.org/packages/build_runner/versions/2.3.2.tar.gz";
+    sha256 = "0b5ha1l6k0gn2swqgqvfy2vl58klf81sxrjnmk0p7rj1wzbqjm7l";
+    url = "https://pub.dartlang.org/packages/build_runner/versions/2.3.3.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   build_runner_core = fetchzip {
-    sha256 = "0bpil0fw0dag3vbnin9p945ymi7xjgkiy7jrq9j52plljf7cnf5z";
-    url = "https://pub.dartlang.org/packages/build_runner_core/versions/7.2.7.tar.gz";
+    sha256 = "07r1kfy6ylm4i4xrb24ns8l26h4h1lgcskmnf8wvq2rd5d5hq790";
+    url = "https://pub.dartlang.org/packages/build_runner_core/versions/7.2.7%2B1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -84,29 +86,29 @@
   };
 
   built_value = fetchzip {
-    sha256 = "0sslr4258snvcj8qhbdk6wapka174als0viyxddwqlnhs7dlci8i";
-    url = "https://pub.dartlang.org/packages/built_value/versions/8.4.2.tar.gz";
+    sha256 = "1y84imf9xqqy3gnd5zz9bcln6mycy7qx35r70b0izm31ismlbzkv";
+    url = "https://pub.dartlang.org/packages/built_value/versions/8.6.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   checked_yaml = fetchzip {
-    sha256 = "1gf7ankc5jb7mk17br87ajv05pfg6vb8nf35ay6c35w8jp70ra7k";
-    url = "https://pub.dartlang.org/packages/checked_yaml/versions/2.0.1.tar.gz";
+    sha256 = "1sn01yrmj0pkijn08g3v45c3zmyvdygk9svigkkzybgicdwlkpqs";
+    url = "https://pub.dartlang.org/packages/checked_yaml/versions/2.0.3.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   code_builder = fetchzip {
-    sha256 = "1vl9dl23yd0zjw52ndrazijs6dw83fg1rvyb2gfdpd6n1lj9nbhg";
-    url = "https://pub.dartlang.org/packages/code_builder/versions/4.3.0.tar.gz";
+    sha256 = "1shgl7mxiyv0hhw326yqj2b9jxi1h74qxmsnxf1d1xc6yz766p9a";
+    url = "https://pub.dartlang.org/packages/code_builder/versions/4.6.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   collection = fetchzip {
-    sha256 = "1iyl3v3j7mj3sxjf63b1kc182fwrwd04mjp5x2i61hic8ihfw545";
-    url = "https://pub.dartlang.org/packages/collection/versions/1.17.0.tar.gz";
+    sha256 = "1mr8j0078c4z9hhckiq8m735rggsazwfprm0w9gisil51vh7j2mk";
+    url = "https://pub.dartlang.org/packages/collection/versions/1.18.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -119,29 +121,29 @@
   };
 
   coverage = fetchzip {
-    sha256 = "0akbg1yp2h4vprc8r9xvrpgvp5d26h7m80h5sbzgr5dlis1bcw0d";
-    url = "https://pub.dartlang.org/packages/coverage/versions/1.6.1.tar.gz";
+    sha256 = "1yy9bgkax5b6kk7qa07p452v82fyj4rl1j03fn366ywyvhfrh6lp";
+    url = "https://pub.dartlang.org/packages/coverage/versions/1.6.3.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   crypto = fetchzip {
-    sha256 = "1kjfb8fvdxazmv9ps2iqdhb8kcr31115h0nwn6v4xmr71k8jb8ds";
-    url = "https://pub.dartlang.org/packages/crypto/versions/3.0.2.tar.gz";
+    sha256 = "100ai8qa4p3dyvvd60c4xa9p0gm06yh0d68xgcfm3giraad8xmqj";
+    url = "https://pub.dartlang.org/packages/crypto/versions/3.0.3.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   cryptography = fetchzip {
-    sha256 = "0jqph45d9lbhdakprnb84c3qhk4aq05hhb1pmn8w23yhl41ypijs";
-    url = "https://pub.dartlang.org/packages/cryptography/versions/2.0.5.tar.gz";
+    sha256 = "1yxn9slqq93ri81fbr2nbsinz0mpk9wk39ny076ja8q31d4i8v3f";
+    url = "https://pub.dartlang.org/packages/cryptography/versions/2.5.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   dart_style = fetchzip {
-    sha256 = "01wg15kalbjlh4i3xbawc9zk8yrk28qhak7xp7mlwn2syhdckn7v";
-    url = "https://pub.dartlang.org/packages/dart_style/versions/2.2.4.tar.gz";
+    sha256 = "0cjhrb1hs8iw9smmfd0fgnxq3nm0w8sz17l6q6svyz6kif19wk9k";
+    url = "https://pub.dartlang.org/packages/dart_style/versions/2.3.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -154,43 +156,29 @@
   };
 
   fixnum = fetchzip {
-    sha256 = "1m8cdfqp9d6w1cik3fwz9bai1wf9j11rjv2z0zlv7ich87q9kkjk";
-    url = "https://pub.dartlang.org/packages/fixnum/versions/1.0.1.tar.gz";
-    stripRoot = false;
-    extension = "tar.gz";
-  };
-
-  freezed = fetchzip {
-    sha256 = "1i9s4djf4vlz56zqn8brcck3n7sk07qay23wmaan991cqydd10iq";
-    url = "https://pub.dartlang.org/packages/freezed/versions/2.1.1.tar.gz";
-    stripRoot = false;
-    extension = "tar.gz";
-  };
-
-  freezed_annotation = fetchzip {
-    sha256 = "0ym120dh1lpfnb68gxh1finm8p9l445q5x10aw8269y469b9k9z3";
-    url = "https://pub.dartlang.org/packages/freezed_annotation/versions/2.1.0.tar.gz";
+    sha256 = "0nqrzj41ys8dpxf1x70r0kfj1avj0f2j2b7498k8kvc0i9c5asz7";
+    url = "https://pub.dartlang.org/packages/fixnum/versions/1.1.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   frontend_server_client = fetchzip {
-    sha256 = "0nv4avkv2if9hdcfzckz36f3mclv7vxchivrg8j3miaqhnjvv4bj";
-    url = "https://pub.dartlang.org/packages/frontend_server_client/versions/3.1.0.tar.gz";
+    sha256 = "096v7ycix5hgnk750s1qgykyghl2mymhdkg39jrlk3kbj6xygq5b";
+    url = "https://pub.dartlang.org/packages/frontend_server_client/versions/3.2.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   glob = fetchzip {
-    sha256 = "0a6gbwsbz6rkg35dkff0zv88rvcflqdmda90hdfpn7jp1z1w9rhs";
-    url = "https://pub.dartlang.org/packages/glob/versions/2.1.0.tar.gz";
+    sha256 = "0ffab3azx8zkma36mk6wnig8bn8g5g0vjrq2gl21y77rxgw9iqxj";
+    url = "https://pub.dartlang.org/packages/glob/versions/2.1.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   graphs = fetchzip {
-    sha256 = "0cr6dgs1a7ln2ir5gd0kiwpn787lk4dwhqfjv8876hkkr1rv80m9";
-    url = "https://pub.dartlang.org/packages/graphs/versions/2.2.0.tar.gz";
+    sha256 = "0fda0j8y6sq1rc9zpzglrzysl5h49y2ji1wq2lq0wx2c609dxm7f";
+    url = "https://pub.dartlang.org/packages/graphs/versions/2.3.1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -217,78 +205,78 @@
   };
 
   io = fetchzip {
-    sha256 = "1bp5l8hkrp6fjj7zw9af51hxyp52sjspc5558lq0lmi453l0czni";
-    url = "https://pub.dartlang.org/packages/io/versions/1.0.3.tar.gz";
+    sha256 = "101kd0rw26vglmr1m5p130kbrp3k7dk4p5nr77wsbwgg53w8c0d4";
+    url = "https://pub.dartlang.org/packages/io/versions/1.0.4.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   js = fetchzip {
-    sha256 = "13fbxgyg1v6bmzvxamg6494vk3923fn3mgxj6f4y476aqwk99n50";
-    url = "https://pub.dartlang.org/packages/js/versions/0.6.5.tar.gz";
+    sha256 = "124a9yqrjdw3p4nnirab9hm9ziwraldlw4q5cb3sr0dcrli74qpw";
+    url = "https://pub.dartlang.org/packages/js/versions/0.6.7.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   json_annotation = fetchzip {
-    sha256 = "1p9nvn33psx2zbalhyqjw8gr4agd76jj5jq0fdz0i584c7l77bby";
-    url = "https://pub.dartlang.org/packages/json_annotation/versions/4.7.0.tar.gz";
+    sha256 = "1jjw7p8qyqajgdq4jqvxipq5w0qrq9dpi1qmia70pk995akryh6m";
+    url = "https://pub.dartlang.org/packages/json_annotation/versions/4.8.1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   json_serializable = fetchzip {
-    sha256 = "04d7laaxrbiybcgbv3y223hy8d6n9f84h5lv9sv79zd9ffzkb2hg";
-    url = "https://pub.dartlang.org/packages/json_serializable/versions/6.5.4.tar.gz";
+    sha256 = "1pmidql9x6s2pbhdx9x20pwqwvwpfkvrz0h0cm1f8pqis76c90hb";
+    url = "https://pub.dartlang.org/packages/json_serializable/versions/6.6.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   logging = fetchzip {
-    sha256 = "0hl1mjh662c44ci7z60x92i0jsyqg1zm6k6fc89n9pdcxsqdpwfs";
-    url = "https://pub.dartlang.org/packages/logging/versions/1.0.2.tar.gz";
+    sha256 = "124hfjs66r30p92ndfmy5fymgy66yk9in97h8sq6fi7r78pqyc7g";
+    url = "https://pub.dartlang.org/packages/logging/versions/1.2.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   matcher = fetchzip {
-    sha256 = "0pjgc38clnjbv124n8bh724db1wcc4kk125j7dxl0icz7clvm0p0";
-    url = "https://pub.dartlang.org/packages/matcher/versions/0.12.13.tar.gz";
+    sha256 = "0inznqkrxqnq09lcbwvda3xd07qfm1k3aa6dv1wy39gvci8hybss";
+    url = "https://pub.dartlang.org/packages/matcher/versions/0.12.16.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   meta = fetchzip {
-    sha256 = "01kqdd25nln5a219pr94s66p27m0kpqz0wpmwnm24kdy3ngif1v5";
-    url = "https://pub.dartlang.org/packages/meta/versions/1.8.0.tar.gz";
+    sha256 = "1l3zaz6q2s9mnm7s674xshsfqspy79p5kdbbnc99rf2l76avv4h3";
+    url = "https://pub.dartlang.org/packages/meta/versions/1.9.1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   mime = fetchzip {
-    sha256 = "1dr3qikzvp10q1saka7azki5gk2kkf2v7k9wfqjsyxmza2zlv896";
-    url = "https://pub.dartlang.org/packages/mime/versions/1.0.2.tar.gz";
+    sha256 = "1dha9z64bsz8xhi0p62vmlyikr8xwbdlrw90hxghmm3rdgd9h25w";
+    url = "https://pub.dartlang.org/packages/mime/versions/1.0.4.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   moxlib = fetchzip {
-    sha256 = "1j52xglpwy8c7dbylc3f6vrh0p52xhhwqs4h0qcqk8c1rvjn5czq";
-    url = "https://git.polynom.me/api/packages/moxxy/pub/api/packages/moxlib/files/0.1.5.tar.gz";
+    sha256 = "1qaacmcqhq33grn2nq8sn23ki62dcmw0fqy589xm1zv6w0pzfmsk";
+    url = "https://git.polynom.me/api/packages/moxxy/pub/api/packages/moxlib/files/0.2.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   node_preamble = fetchzip {
-    sha256 = "0i0gfc2yqa09182vc01lj47qpq98kfm9m8h4n8c5fby0mjd0lvyx";
-    url = "https://pub.dartlang.org/packages/node_preamble/versions/2.0.1.tar.gz";
+    sha256 = "12ajg76r9aqmqkavvlxbnb3sszg1szcq3f30badkd0xc25mnhyh8";
+    url = "https://pub.dartlang.org/packages/node_preamble/versions/2.0.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   omemo_dart = fetchzip {
-    sha256 = "09x3jqa11hjdjp31nxnz91j6jssbc2f8a1lh44fmkc0d79hs8bbi";
-    url = "https://git.polynom.me/api/packages/PapaTutuWawa/pub/api/packages/omemo_dart/files/0.4.3.tar.gz";
+    sha256 = "0fhf89ic5mdyld25l6rfb37a1fk1f0f2b4d72xi4r7pvr0ddjhz8";
+    url = "https://git.polynom.me/api/packages/PapaTutuWawa/pub/api/packages/omemo_dart/files/0.5.1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -301,8 +289,8 @@
   };
 
   path = fetchzip {
-    sha256 = "16ggdh29ciy7h8sdshhwmxn6dd12sfbykf2j82c56iwhhlljq181";
-    url = "https://pub.dartlang.org/packages/path/versions/1.8.2.tar.gz";
+    sha256 = "1mjdhq2fsz6i9krhp2mnaks2bcw34sa4p7mg0v6njk8dgx2754iv";
+    url = "https://pub.dartlang.org/packages/path/versions/1.8.3.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -315,8 +303,8 @@
   };
 
   petitparser = fetchzip {
-    sha256 = "1pqqqqiy9ald24qsi24q9qrr0zphgpsrnrv9rlx4vwr6xak7d8c0";
-    url = "https://pub.dartlang.org/packages/petitparser/versions/5.1.0.tar.gz";
+    sha256 = "19zqrpb1z77aw1k2s8rsxdfxczzv9934g2rdfj2jyiv3pqgdq8gh";
+    url = "https://pub.dartlang.org/packages/petitparser/versions/5.4.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -335,16 +323,30 @@
     extension = "tar.gz";
   };
 
+  protobuf = fetchzip {
+    sha256 = "1jriyisf8bnvq5ygjk93mn2yzdlnii7xrhy6aabz54xr3y4dcy9x";
+    url = "https://pub.dartlang.org/packages/protobuf/versions/2.1.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  protoc_plugin = fetchzip {
+    sha256 = "0hjjd1xkv4s4g1d5n2aza0kdwlbfl2aivq99230m3yml7irn00jk";
+    url = "https://pub.dartlang.org/packages/protoc_plugin/versions/20.0.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
   pub_semver = fetchzip {
-    sha256 = "1vsj5c1f2dza4l5zmjix4zh65lp8gsg6pw01h57pijx2id0g4bwi";
-    url = "https://pub.dartlang.org/packages/pub_semver/versions/2.1.2.tar.gz";
+    sha256 = "0wpcfz1crxipbjm18m71pl4vl2ra8vw1n93ff8snr54mmlyfb9z1";
+    url = "https://pub.dartlang.org/packages/pub_semver/versions/2.1.4.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   pubspec_parse = fetchzip {
-    sha256 = "19dmr9k4wsqjnhlzp1lbrw8dv7a1gnwmr8l5j9zlw407rmfg20d1";
-    url = "https://pub.dartlang.org/packages/pubspec_parse/versions/1.2.1.tar.gz";
+    sha256 = "0dj8sf1w61g7vh1ly3sl690z0nwllzjzbapxswmgsglr0ndcyrs1";
+    url = "https://pub.dartlang.org/packages/pubspec_parse/versions/1.2.3.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -364,43 +366,43 @@
   };
 
   shelf = fetchzip {
-    sha256 = "0x2xl7glrnq0hdxpy2i94a4wxbdrd6dm46hvhzgjn8alsm8z0wz1";
-    url = "https://pub.dartlang.org/packages/shelf/versions/1.4.0.tar.gz";
+    sha256 = "10yk98nadrgj5d3r3241kdaywjjs1j10mg8gacv80kg1mhcfdrxp";
+    url = "https://pub.dartlang.org/packages/shelf/versions/1.4.1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   shelf_packages_handler = fetchzip {
-    sha256 = "199rbdbifj46lg3iynznnsbs8zr4dfcw0s7wan8v73nvpqvli82q";
-    url = "https://pub.dartlang.org/packages/shelf_packages_handler/versions/3.0.1.tar.gz";
+    sha256 = "1h8s42nff9ar0xn7yb42m64lpvmqzq8wranqrkkixdnp7w3pmv1x";
+    url = "https://pub.dartlang.org/packages/shelf_packages_handler/versions/3.0.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   shelf_static = fetchzip {
-    sha256 = "1kqbaslz7bna9lldda3ibrjg0gczbzlwgm9cic8shg0bnl0v3s34";
-    url = "https://pub.dartlang.org/packages/shelf_static/versions/1.1.1.tar.gz";
+    sha256 = "1bcqynn2z2syrigmrclxgg8hjhd1x9742938i62cicbaga6vclaz";
+    url = "https://pub.dartlang.org/packages/shelf_static/versions/1.1.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   shelf_web_socket = fetchzip {
-    sha256 = "0rr87nx2wdf9alippxiidqlgi82fbprnsarr1jswg9qin0yy4jpn";
-    url = "https://pub.dartlang.org/packages/shelf_web_socket/versions/1.0.3.tar.gz";
+    sha256 = "110b5hrqwpnmq16shxxzjmcih5yfs5kh80dn8avfv0xj5iv7n94c";
+    url = "https://pub.dartlang.org/packages/shelf_web_socket/versions/1.0.4.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   source_gen = fetchzip {
-    sha256 = "1kxgx782lzpjhv736h0pz3lnxpcgiy05h0ysy0q77gix8q09i1hz";
-    url = "https://pub.dartlang.org/packages/source_gen/versions/1.2.6.tar.gz";
+    sha256 = "1jql5zccv4vnbbvwcpyyvz8l27pg1rviqbp4vrks5313nf4b0kjg";
+    url = "https://pub.dartlang.org/packages/source_gen/versions/1.3.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   source_helper = fetchzip {
-    sha256 = "044kzmzlfpx93s4raz5avijahizmvai0zvl0lbm4wi93ynhdp1pd";
-    url = "https://pub.dartlang.org/packages/source_helper/versions/1.3.3.tar.gz";
+    sha256 = "0mdd02vhcdcv9n58gzbx2q0bphwj0alz312ca1a8xpkf8jx3y8v4";
+    url = "https://pub.dartlang.org/packages/source_helper/versions/1.3.4.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -413,29 +415,29 @@
   };
 
   source_maps = fetchzip {
-    sha256 = "18ixrlz3l2alk3hp0884qj0mcgzhxmjpg6nq0n1200pfy62pc4z6";
-    url = "https://pub.dartlang.org/packages/source_maps/versions/0.10.11.tar.gz";
+    sha256 = "004lcfka01agxjdw7zjhrffdkisvgx5s61b5gsl8qqk2jd1rswa7";
+    url = "https://pub.dartlang.org/packages/source_maps/versions/0.10.12.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   source_span = fetchzip {
-    sha256 = "1lq4sy7lw15qsv9cijf6l48p16qr19r7njzwr4pxn8vv1kh6rb86";
-    url = "https://pub.dartlang.org/packages/source_span/versions/1.9.1.tar.gz";
+    sha256 = "1nybnf7l5chslp4fczhqnrgrhymy844lw7qrj6y08i626dshrd46";
+    url = "https://pub.dartlang.org/packages/source_span/versions/1.10.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   stack_trace = fetchzip {
-    sha256 = "0bggqvvpkrfvqz24bnir4959k0c45azc3zivk4lyv3mvba6092na";
-    url = "https://pub.dartlang.org/packages/stack_trace/versions/1.11.0.tar.gz";
+    sha256 = "0xpk2cvmgdh46iwip9jsb54fqx13jnina8pk03akxkmsxvag5izb";
+    url = "https://pub.dartlang.org/packages/stack_trace/versions/1.11.1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   stream_channel = fetchzip {
-    sha256 = "054by84c60yxphr3qgg6f82gg6d22a54aqjp265anlm8dwz1ji32";
-    url = "https://pub.dartlang.org/packages/stream_channel/versions/2.1.1.tar.gz";
+    sha256 = "0nrlw6zcscgnn6818krkbgs9qiv3f7q8pa7ljw1bqkrsb7xabm8s";
+    url = "https://pub.dartlang.org/packages/stream_channel/versions/2.1.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -455,8 +457,8 @@
   };
 
   synchronized = fetchzip {
-    sha256 = "1j6108cq1hbcqpwhk9sah8q3gcidd7222bzhha2nk9syxhzqy82i";
-    url = "https://pub.dartlang.org/packages/synchronized/versions/3.0.0%2B2.tar.gz";
+    sha256 = "1fx1z1p5qkn4qnq24riw5s86vmq645ppg8f74iyv2fc9rvr301ar";
+    url = "https://pub.dartlang.org/packages/synchronized/versions/3.1.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -469,36 +471,36 @@
   };
 
   test = fetchzip {
-    sha256 = "08kimbjvkdw3bkj7za36p3yqdr8dnlb5v30c250kvdncb7k09h4x";
-    url = "https://pub.dartlang.org/packages/test/versions/1.22.0.tar.gz";
+    sha256 = "002phlj2pg6nll5hv449izxbqk29zwmwc77d0jx2iimz18dgy2r5";
+    url = "https://pub.dartlang.org/packages/test/versions/1.24.3.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   test_api = fetchzip {
-    sha256 = "0mfyjpqkkmaqdh7xygrydx12591wq9ll816f61n80dc6rmkdx7px";
-    url = "https://pub.dartlang.org/packages/test_api/versions/0.4.16.tar.gz";
+    sha256 = "0as1xcywjrd2zax3cm56qmnac12shf8c1ynnzzjwnggm23f61dxb";
+    url = "https://pub.dartlang.org/packages/test_api/versions/0.6.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   test_core = fetchzip {
-    sha256 = "1r8dnvkxxvh55z1c8lrsja1m0dkf5i4lgwwqixcx0mqvxx5w3005";
-    url = "https://pub.dartlang.org/packages/test_core/versions/0.4.20.tar.gz";
+    sha256 = "1cx2rmz1xzk5z5yh8fpbsrsz4mgjanrw4xvnp0qzdnm2d7vhaq0y";
+    url = "https://pub.dartlang.org/packages/test_core/versions/0.5.3.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   timing = fetchzip {
-    sha256 = "0a02znvy0fbzr0n4ai67pp8in7w6m768aynkk1kp5lnmgy17ppsg";
-    url = "https://pub.dartlang.org/packages/timing/versions/1.0.0.tar.gz";
+    sha256 = "15jvxsw7v0gwbdlykma60l1qlhlzb3brh6m0sg2bgbfir4l5s9gw";
+    url = "https://pub.dartlang.org/packages/timing/versions/1.0.1.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   typed_data = fetchzip {
-    sha256 = "1x402bvyzdmdvmyqhyfamjxf54p9j8sa8ns2n5dwsdhnfqbw859g";
-    url = "https://pub.dartlang.org/packages/typed_data/versions/1.3.1.tar.gz";
+    sha256 = "0q6ggc52vfpr8kqaq69h757wy942hvgshhnsr2pjdinb4zk2sxl1";
+    url = "https://pub.dartlang.org/packages/typed_data/versions/1.3.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -511,8 +513,8 @@
   };
 
   uuid = fetchzip {
-    sha256 = "12lsynr07lw9848jknmzxvzn3ia12xdj07iiva0vg0qjvpq7ladg";
-    url = "https://pub.dartlang.org/packages/uuid/versions/3.0.5.tar.gz";
+    sha256 = "1nh1hxfr6bhyadqqcxrpwrphmm75f1iq4rzfjdwa2486xwlh7vx3";
+    url = "https://pub.dartlang.org/packages/uuid/versions/3.0.7.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -525,8 +527,8 @@
   };
 
   vm_service = fetchzip {
-    sha256 = "05xaxaxzyfls6jklw1hzws2jmina1cjk10gbl7a63djh1ghnzjb5";
-    url = "https://pub.dartlang.org/packages/vm_service/versions/9.4.0.tar.gz";
+    sha256 = "15ail7rbaq9ksg73cc0mw2k5imbiidl95yfd4v49k81gp5xmj92w";
+    url = "https://pub.dartlang.org/packages/vm_service/versions/11.10.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -539,8 +541,8 @@
   };
 
   web_socket_channel = fetchzip {
-    sha256 = "147amn05v1f1a1grxjr7yzgshrczjwijwiywggsv6dgic8kxyj5a";
-    url = "https://pub.dartlang.org/packages/web_socket_channel/versions/2.2.0.tar.gz";
+    sha256 = "0f9441c4zifb5qadpjg319dcilimpkdhfacnkl543802bf8qjn4w";
+    url = "https://pub.dartlang.org/packages/web_socket_channel/versions/2.4.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
@@ -553,262 +555,262 @@
   };
 
   xml = fetchzip {
-    sha256 = "0jwknkfcnb5svg6r01xjsj0aiw06mlx54pgay1ymaaqm2mjhyz01";
-    url = "https://pub.dartlang.org/packages/xml/versions/6.2.0.tar.gz";
+    sha256 = "120azx71gazvrrn07vd83vrffzrhsqnmf9rdjxl73rra9py8ixiy";
+    url = "https://pub.dartlang.org/packages/xml/versions/6.3.0.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   yaml = fetchzip {
-    sha256 = "0mqqmzn3c9rr38b5xm312fz1vyp6vb36lm477r9hak77bxzpp0iw";
-    url = "https://pub.dartlang.org/packages/yaml/versions/3.1.1.tar.gz";
+    sha256 = "0awh9dynbhrlq8zgszaiyxbyyn9b6wyps1zww4z2lx62nbma0pda";
+    url = "https://pub.dartlang.org/packages/yaml/versions/3.1.2.tar.gz";
     stripRoot = false;
     extension = "tar.gz";
   };
 
   pubCache = runCommand "moxxmpp-pub-cache" {} ''
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${_fe_analyzer_shared} $out/hosted/pub.dartlang.org/_fe_analyzer_shared-50.0.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${_fe_analyzer_shared} $out/hosted/pub.dev/_fe_analyzer_shared-61.0.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${analyzer} $out/hosted/pub.dartlang.org/analyzer-5.2.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${analyzer} $out/hosted/pub.dev/analyzer-5.13.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${args} $out/hosted/pub.dartlang.org/args-2.3.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${args} $out/hosted/pub.dev/args-2.4.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${async} $out/hosted/pub.dartlang.org/async-2.10.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${async} $out/hosted/pub.dev/async-2.11.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${boolean_selector} $out/hosted/pub.dartlang.org/boolean_selector-2.1.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${boolean_selector} $out/hosted/pub.dev/boolean_selector-2.1.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${build} $out/hosted/pub.dartlang.org/build-2.3.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${build} $out/hosted/pub.dev/build-2.3.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${build_config} $out/hosted/pub.dartlang.org/build_config-1.1.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${build_config} $out/hosted/pub.dev/build_config-1.1.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${build_daemon} $out/hosted/pub.dartlang.org/build_daemon-3.1.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${build_daemon} $out/hosted/pub.dev/build_daemon-3.1.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${build_resolvers} $out/hosted/pub.dartlang.org/build_resolvers-2.1.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${build_resolvers} $out/hosted/pub.dev/build_resolvers-2.3.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${build_runner} $out/hosted/pub.dartlang.org/build_runner-2.3.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${build_runner} $out/hosted/pub.dev/build_runner-2.3.3
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${build_runner_core} $out/hosted/pub.dartlang.org/build_runner_core-7.2.7
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${build_runner_core} $out/hosted/pub.dev/build_runner_core-7.2.7+1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${built_collection} $out/hosted/pub.dartlang.org/built_collection-5.1.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${built_collection} $out/hosted/pub.dev/built_collection-5.1.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${built_value} $out/hosted/pub.dartlang.org/built_value-8.4.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${built_value} $out/hosted/pub.dev/built_value-8.6.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${checked_yaml} $out/hosted/pub.dartlang.org/checked_yaml-2.0.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${checked_yaml} $out/hosted/pub.dev/checked_yaml-2.0.3
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${code_builder} $out/hosted/pub.dartlang.org/code_builder-4.3.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${code_builder} $out/hosted/pub.dev/code_builder-4.6.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${collection} $out/hosted/pub.dartlang.org/collection-1.17.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${collection} $out/hosted/pub.dev/collection-1.18.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${convert} $out/hosted/pub.dartlang.org/convert-3.1.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${convert} $out/hosted/pub.dev/convert-3.1.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${coverage} $out/hosted/pub.dartlang.org/coverage-1.6.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${coverage} $out/hosted/pub.dev/coverage-1.6.3
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${crypto} $out/hosted/pub.dartlang.org/crypto-3.0.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${crypto} $out/hosted/pub.dev/crypto-3.0.3
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${cryptography} $out/hosted/pub.dartlang.org/cryptography-2.0.5
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${cryptography} $out/hosted/pub.dev/cryptography-2.5.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${dart_style} $out/hosted/pub.dartlang.org/dart_style-2.2.4
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${dart_style} $out/hosted/pub.dev/dart_style-2.3.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${file} $out/hosted/pub.dartlang.org/file-6.1.4
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${file} $out/hosted/pub.dev/file-6.1.4
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${fixnum} $out/hosted/pub.dartlang.org/fixnum-1.0.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${fixnum} $out/hosted/pub.dev/fixnum-1.1.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${freezed} $out/hosted/pub.dartlang.org/freezed-2.1.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${frontend_server_client} $out/hosted/pub.dev/frontend_server_client-3.2.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${freezed_annotation} $out/hosted/pub.dartlang.org/freezed_annotation-2.1.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${glob} $out/hosted/pub.dev/glob-2.1.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${frontend_server_client} $out/hosted/pub.dartlang.org/frontend_server_client-3.1.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${graphs} $out/hosted/pub.dev/graphs-2.3.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${glob} $out/hosted/pub.dartlang.org/glob-2.1.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${hex} $out/hosted/pub.dev/hex-0.2.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${graphs} $out/hosted/pub.dartlang.org/graphs-2.2.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${http_multi_server} $out/hosted/pub.dev/http_multi_server-3.2.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${hex} $out/hosted/pub.dartlang.org/hex-0.2.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${http_parser} $out/hosted/pub.dev/http_parser-4.0.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${http_multi_server} $out/hosted/pub.dartlang.org/http_multi_server-3.2.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${io} $out/hosted/pub.dev/io-1.0.4
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${http_parser} $out/hosted/pub.dartlang.org/http_parser-4.0.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${js} $out/hosted/pub.dev/js-0.6.7
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${io} $out/hosted/pub.dartlang.org/io-1.0.3
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${json_annotation} $out/hosted/pub.dev/json_annotation-4.8.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${js} $out/hosted/pub.dartlang.org/js-0.6.5
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${json_serializable} $out/hosted/pub.dev/json_serializable-6.6.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${json_annotation} $out/hosted/pub.dartlang.org/json_annotation-4.7.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${logging} $out/hosted/pub.dev/logging-1.2.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${json_serializable} $out/hosted/pub.dartlang.org/json_serializable-6.5.4
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${matcher} $out/hosted/pub.dev/matcher-0.12.16
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${logging} $out/hosted/pub.dartlang.org/logging-1.0.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${meta} $out/hosted/pub.dev/meta-1.9.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${matcher} $out/hosted/pub.dartlang.org/matcher-0.12.13
-
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${meta} $out/hosted/pub.dartlang.org/meta-1.8.0
-
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${mime} $out/hosted/pub.dartlang.org/mime-1.0.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${mime} $out/hosted/pub.dev/mime-1.0.4
 
     mkdir -p $out/hosted/git.polynom.me%47api%47packages%47Moxxy%47pub%47
-    ln -s ${moxlib} $out/hosted/git.polynom.me%47api%47packages%47Moxxy%47pub%47/moxlib-0.1.5
+    ln -s ${moxlib} $out/hosted/git.polynom.me%47api%47packages%47Moxxy%47pub%47/moxlib-0.2.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${node_preamble} $out/hosted/pub.dartlang.org/node_preamble-2.0.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${node_preamble} $out/hosted/pub.dev/node_preamble-2.0.2
 
     mkdir -p $out/hosted/git.polynom.me%47api%47packages%47PapaTutuWawa%47pub%47
-    ln -s ${omemo_dart} $out/hosted/git.polynom.me%47api%47packages%47PapaTutuWawa%47pub%47/omemo_dart-0.4.3
+    ln -s ${omemo_dart} $out/hosted/git.polynom.me%47api%47packages%47PapaTutuWawa%47pub%47/omemo_dart-0.5.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${package_config} $out/hosted/pub.dartlang.org/package_config-2.1.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${package_config} $out/hosted/pub.dev/package_config-2.1.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${path} $out/hosted/pub.dartlang.org/path-1.8.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${path} $out/hosted/pub.dev/path-1.8.3
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${pedantic} $out/hosted/pub.dartlang.org/pedantic-1.11.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${pedantic} $out/hosted/pub.dev/pedantic-1.11.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${petitparser} $out/hosted/pub.dartlang.org/petitparser-5.1.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${petitparser} $out/hosted/pub.dev/petitparser-5.4.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${pinenacl} $out/hosted/pub.dartlang.org/pinenacl-0.5.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${pinenacl} $out/hosted/pub.dev/pinenacl-0.5.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${pool} $out/hosted/pub.dartlang.org/pool-1.5.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${pool} $out/hosted/pub.dev/pool-1.5.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${pub_semver} $out/hosted/pub.dartlang.org/pub_semver-2.1.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${protobuf} $out/hosted/pub.dev/protobuf-2.1.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${pubspec_parse} $out/hosted/pub.dartlang.org/pubspec_parse-1.2.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${protoc_plugin} $out/hosted/pub.dev/protoc_plugin-20.0.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${random_string} $out/hosted/pub.dartlang.org/random_string-2.3.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${pub_semver} $out/hosted/pub.dev/pub_semver-2.1.4
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${saslprep} $out/hosted/pub.dartlang.org/saslprep-1.0.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${pubspec_parse} $out/hosted/pub.dev/pubspec_parse-1.2.3
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${shelf} $out/hosted/pub.dartlang.org/shelf-1.4.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${random_string} $out/hosted/pub.dev/random_string-2.3.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${shelf_packages_handler} $out/hosted/pub.dartlang.org/shelf_packages_handler-3.0.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${saslprep} $out/hosted/pub.dev/saslprep-1.0.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${shelf_static} $out/hosted/pub.dartlang.org/shelf_static-1.1.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${shelf} $out/hosted/pub.dev/shelf-1.4.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${shelf_web_socket} $out/hosted/pub.dartlang.org/shelf_web_socket-1.0.3
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${shelf_packages_handler} $out/hosted/pub.dev/shelf_packages_handler-3.0.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${source_gen} $out/hosted/pub.dartlang.org/source_gen-1.2.6
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${shelf_static} $out/hosted/pub.dev/shelf_static-1.1.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${source_helper} $out/hosted/pub.dartlang.org/source_helper-1.3.3
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${shelf_web_socket} $out/hosted/pub.dev/shelf_web_socket-1.0.4
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${source_map_stack_trace} $out/hosted/pub.dartlang.org/source_map_stack_trace-2.1.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${source_gen} $out/hosted/pub.dev/source_gen-1.3.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${source_maps} $out/hosted/pub.dartlang.org/source_maps-0.10.11
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${source_helper} $out/hosted/pub.dev/source_helper-1.3.4
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${source_span} $out/hosted/pub.dartlang.org/source_span-1.9.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${source_map_stack_trace} $out/hosted/pub.dev/source_map_stack_trace-2.1.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${stack_trace} $out/hosted/pub.dartlang.org/stack_trace-1.11.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${source_maps} $out/hosted/pub.dev/source_maps-0.10.12
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${stream_channel} $out/hosted/pub.dartlang.org/stream_channel-2.1.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${source_span} $out/hosted/pub.dev/source_span-1.10.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${stream_transform} $out/hosted/pub.dartlang.org/stream_transform-2.1.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${stack_trace} $out/hosted/pub.dev/stack_trace-1.11.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${string_scanner} $out/hosted/pub.dartlang.org/string_scanner-1.2.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${stream_channel} $out/hosted/pub.dev/stream_channel-2.1.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${synchronized} $out/hosted/pub.dartlang.org/synchronized-3.0.0+2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${stream_transform} $out/hosted/pub.dev/stream_transform-2.1.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${term_glyph} $out/hosted/pub.dartlang.org/term_glyph-1.2.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${string_scanner} $out/hosted/pub.dev/string_scanner-1.2.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${test} $out/hosted/pub.dartlang.org/test-1.22.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${synchronized} $out/hosted/pub.dev/synchronized-3.1.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${test_api} $out/hosted/pub.dartlang.org/test_api-0.4.16
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${term_glyph} $out/hosted/pub.dev/term_glyph-1.2.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${test_core} $out/hosted/pub.dartlang.org/test_core-0.4.20
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${test} $out/hosted/pub.dev/test-1.24.3
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${timing} $out/hosted/pub.dartlang.org/timing-1.0.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${test_api} $out/hosted/pub.dev/test_api-0.6.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${typed_data} $out/hosted/pub.dartlang.org/typed_data-1.3.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${test_core} $out/hosted/pub.dev/test_core-0.5.3
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${unorm_dart} $out/hosted/pub.dartlang.org/unorm_dart-0.2.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${timing} $out/hosted/pub.dev/timing-1.0.1
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${uuid} $out/hosted/pub.dartlang.org/uuid-3.0.5
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${typed_data} $out/hosted/pub.dev/typed_data-1.3.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${very_good_analysis} $out/hosted/pub.dartlang.org/very_good_analysis-3.1.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${unorm_dart} $out/hosted/pub.dev/unorm_dart-0.2.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${vm_service} $out/hosted/pub.dartlang.org/vm_service-9.4.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${uuid} $out/hosted/pub.dev/uuid-3.0.7
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${watcher} $out/hosted/pub.dartlang.org/watcher-1.0.2
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${very_good_analysis} $out/hosted/pub.dev/very_good_analysis-3.1.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${web_socket_channel} $out/hosted/pub.dartlang.org/web_socket_channel-2.2.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${vm_service} $out/hosted/pub.dev/vm_service-11.10.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${webkit_inspection_protocol} $out/hosted/pub.dartlang.org/webkit_inspection_protocol-1.2.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${watcher} $out/hosted/pub.dev/watcher-1.0.2
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${xml} $out/hosted/pub.dartlang.org/xml-6.2.0
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${web_socket_channel} $out/hosted/pub.dev/web_socket_channel-2.4.0
 
-    mkdir -p $out/hosted/pub.dartlang.org
-    ln -s ${yaml} $out/hosted/pub.dartlang.org/yaml-3.1.1
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${webkit_inspection_protocol} $out/hosted/pub.dev/webkit_inspection_protocol-1.2.0
+
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${xml} $out/hosted/pub.dev/xml-6.3.0
+
+    mkdir -p $out/hosted/pub.dev
+    ln -s ${yaml} $out/hosted/pub.dev/yaml-3.1.2
 '';
 
 }

packages/moxxmpp/CHANGELOG.md

@@ -1,7 +1,34 @@
-## 0.3.2
+## 0.4.1
+- Moved FAST from staging to xep_0484.dart
+
+## 0.4.0
 
 - **BREAKING**: Remove `lastResource` from `XmppConnection`'s `connect` method. Instead, set the `StreamManagementNegotiator`'s `resource` attribute instead. Since the resource can only really be restored by stream management, this is no issue.
 - **BREAKING**: Changed order of parameters of `CryptographicHashManager.hashFromData`
+- **BREAKING**: Removed support for XEP-0414, as the (supported) hash computations are already implemented by `CryptographicHashManager.hashFromData`.
+- The `DiscoManager` now only handled entity capabilities if a `EntityCapabilityManager` is registered.
+- The `EntityCapabilityManager` now verifies and validates its data before caching.
+- **BREAKING**: Added the `resumed` parameter to `StreamNegotiationsDoneEvent`. Use this to check if the current stream is new or resumed instead of using the `ConnectionStateChangedEvent`.
+- **BREAKING**: Remove `DiscoManager.discoInfoCapHashQuery`.
+- **BREAKING**: The entity argument of `DiscoManager.discoInfoQuery` and `DiscoManager.discoItemsQuery` are now `JID` instead of `String`.
+- **BREAKING**: `PubSubManager` and `UserAvatarManager` now use `JID` instead of `String`.
+- **BREAKING**: `XmppConnection.sendStanza` not only takes a `StanzaDetails` argument.
+- Sent stanzas are now kept in a queue until sent.
+- **BREAKING**: `MessageManager.sendMessage` does not use `MessageDetails` anymore. Instead, use `TypedMap`.
+- `MessageManager` now allows registering callbacks for adding data whenever a message is sent.
+- **BREAKING**: `MessageEvent` now makes use of `TypedMap`.
+- **BREAKING**: Removed `PresenceReceivedEvent`. Use a manager registering handlers with priority greater than `[PresenceManager.presenceHandlerPriority]` instead.
+- **BREAKING**: `ChatState.toString()` is now `ChatState.toName()`
+- **BREAKING**: Overriding `BaseOmemoManager` is no longer required. `OmemoManager` now takes callback methods instead.
+- Removed `ErrorResponseDiscoError` from the possible XEP-0030 errors.
+- **BREAKING**: Removed "Extensible File Thumbnails" (The `Thumbnail` type).
+- *BREAKING*: Rename `UserAvatarManager`'s `getUserAvatar` to `getUserAvatarData`. It now also requires the id of the avatar to fetch
+- *BREAKING*: `UserAvatarManager`'s `getAvatarId` with `getLatestMetadata`.
+- The `PubSubManager` now supports PubSub's `max_items` in `getItems`.
+- *BREAKING*: `vCardManager`'s `VCardAvatarUpdatedEvent` no longer automatically requests the newest VCard avatar.
+- *BREAKING*: `XmppConnection` now tries to ensure that incoming data is processed in-order. The only exception are awaited stanzas as they are allowed to bypass the queue.
+- *BREAKING*: If a stanza handler causes an exception, the handler is simply skipped while processing.
+- Add better logging around what stanza handler is running and if they end processing early.
 
 ## 0.3.1
 

packages/moxxmpp/lib/moxxmpp.dart

@@ -18,7 +18,6 @@ export 'package:moxxmpp/src/managers/namespaces.dart';
 export 'package:moxxmpp/src/managers/priorities.dart';
 export 'package:moxxmpp/src/message.dart';
 export 'package:moxxmpp/src/namespaces.dart';
-export 'package:moxxmpp/src/negotiators/manager.dart';
 export 'package:moxxmpp/src/negotiators/namespaces.dart';
 export 'package:moxxmpp/src/negotiators/negotiator.dart';
 export 'package:moxxmpp/src/ping.dart';
@@ -39,15 +38,17 @@ export 'package:moxxmpp/src/settings.dart';
 export 'package:moxxmpp/src/socket.dart';
 export 'package:moxxmpp/src/stanza.dart';
 export 'package:moxxmpp/src/stringxml.dart';
-export 'package:moxxmpp/src/types/result.dart';
-export 'package:moxxmpp/src/xeps/staging/extensible_file_thumbnails.dart';
-export 'package:moxxmpp/src/xeps/staging/fast.dart';
+export 'package:moxxmpp/src/util/typed_map.dart';
 export 'package:moxxmpp/src/xeps/staging/file_upload_notification.dart';
 export 'package:moxxmpp/src/xeps/xep_0004.dart';
 export 'package:moxxmpp/src/xeps/xep_0030/errors.dart';
 export 'package:moxxmpp/src/xeps/xep_0030/helpers.dart';
 export 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 export 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
+export 'package:moxxmpp/src/xeps/xep_0045/errors.dart';
+export 'package:moxxmpp/src/xeps/xep_0045/events.dart';
+export 'package:moxxmpp/src/xeps/xep_0045/types.dart';
+export 'package:moxxmpp/src/xeps/xep_0045/xep_0045.dart';
 export 'package:moxxmpp/src/xeps/xep_0054.dart';
 export 'package:moxxmpp/src/xeps/xep_0060/errors.dart';
 export 'package:moxxmpp/src/xeps/xep_0060/helpers.dart';
@@ -63,6 +64,7 @@ export 'package:moxxmpp/src/xeps/xep_0198/nonzas.dart';
 export 'package:moxxmpp/src/xeps/xep_0198/state.dart';
 export 'package:moxxmpp/src/xeps/xep_0198/xep_0198.dart';
 export 'package:moxxmpp/src/xeps/xep_0203.dart';
+export 'package:moxxmpp/src/xeps/xep_0264.dart';
 export 'package:moxxmpp/src/xeps/xep_0280.dart';
 export 'package:moxxmpp/src/xeps/xep_0297.dart';
 export 'package:moxxmpp/src/xeps/xep_0300.dart';
@@ -85,7 +87,7 @@ export 'package:moxxmpp/src/xeps/xep_0388/errors.dart';
 export 'package:moxxmpp/src/xeps/xep_0388/negotiators.dart';
 export 'package:moxxmpp/src/xeps/xep_0388/user_agent.dart';
 export 'package:moxxmpp/src/xeps/xep_0388/xep_0388.dart';
-export 'package:moxxmpp/src/xeps/xep_0414.dart';
+export 'package:moxxmpp/src/xeps/xep_0421.dart';
 export 'package:moxxmpp/src/xeps/xep_0424.dart';
 export 'package:moxxmpp/src/xeps/xep_0444.dart';
 export 'package:moxxmpp/src/xeps/xep_0446.dart';
@@ -93,3 +95,4 @@ export 'package:moxxmpp/src/xeps/xep_0447.dart';
 export 'package:moxxmpp/src/xeps/xep_0448.dart';
 export 'package:moxxmpp/src/xeps/xep_0449.dart';
 export 'package:moxxmpp/src/xeps/xep_0461.dart';
+export 'package:moxxmpp/src/xeps/xep_0484.dart';

packages/moxxmpp/lib/src/awaiter.dart

@@ -1,35 +1,13 @@
 import 'dart:async';
-import 'package:meta/meta.dart';
-import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 import 'package:synchronized/synchronized.dart';
 
-/// A surrogate key for awaiting stanzas.
-@immutable
-class _StanzaSurrogateKey {
-  const _StanzaSurrogateKey(this.sentTo, this.id, this.tag);
+/// (JID we sent a stanza to, the id of the sent stanza, the tag of the sent stanza).
+// ignore: avoid_private_typedef_functions
+typedef _StanzaCompositeKey = (String?, String, String);
 
-  /// The JID the original stanza was sent to. We expect the result to come from the
-  /// same JID.
-  final String sentTo;
-
-  /// The ID of the original stanza. We expect the result to have the same ID.
-  final String id;
-
-  /// The tag name of the stanza.
-  final String tag;
-
-  @override
-  int get hashCode => sentTo.hashCode ^ id.hashCode ^ tag.hashCode;
-
-  @override
-  bool operator ==(Object other) {
-    return other is _StanzaSurrogateKey &&
-        other.sentTo == sentTo &&
-        other.id == id &&
-        other.tag == tag;
-  }
-}
+/// Callback function that returns the bare JID of the connection as a String.
+typedef GetBareJidCallback = String Function();
 
 /// This class handles the await semantics for stanzas. Stanzas are given a "unique"
 /// key equal to the tuple (to, id, tag) with which their response is identified.
@@ -40,8 +18,12 @@ class _StanzaSurrogateKey {
 ///
 /// This class also handles some "edge cases" of RFC 6120, like an empty "from" attribute.
 class StanzaAwaiter {
+  StanzaAwaiter(this._bareJidCallback);
+
+  final GetBareJidCallback _bareJidCallback;
+
   /// The pending stanzas, identified by their surrogate key.
-  final Map<_StanzaSurrogateKey, Completer<XMLNode>> _pending = {};
+  final Map<_StanzaCompositeKey, Completer<XMLNode>> _pending = {};
 
   /// The critical section for accessing [StanzaAwaiter._pending].
   final Lock _lock = Lock();
@@ -52,30 +34,33 @@ class StanzaAwaiter {
   /// [tag] is the stanza's tag name.
   ///
   /// Returns a future that might resolve to the response to the stanza.
-  Future<Future<XMLNode>> addPending(String to, String id, String tag) async {
+  Future<Future<XMLNode>> addPending(String? to, String id, String tag) async {
+    // Check if we want to send a stanza to our bare JID and replace it with null.
+    final processedTo = to != null && to == _bareJidCallback() ? null : to;
+
     final completer = await _lock.synchronized(() {
       final completer = Completer<XMLNode>();
-      _pending[_StanzaSurrogateKey(to, id, tag)] = completer;
+      _pending[(processedTo, id, tag)] = completer;
       return completer;
     });
 
     return completer.future;
   }
 
-  /// Checks if the stanza [stanza] is being awaited. [bareJid] is the bare JID of
-  /// the connection.
+  /// Checks if the stanza [stanza] is being awaited.
   /// If [stanza] is awaited, resolves the future and returns true. If not, returns
   /// false.
-  Future<bool> onData(XMLNode stanza, JID bareJid) async {
-    assert(bareJid.isBare(), 'bareJid must be bare');
-
+  Future<bool> onData(XMLNode stanza) async {
     final id = stanza.attributes['id'] as String?;
     if (id == null) return false;
 
-    final key = _StanzaSurrogateKey(
-      // Section 8.1.2.1 § 3 of RFC 6120 says that an empty "from" indicates that the
-      // attribute is implicitly from our own bare JID.
-      stanza.attributes['from'] as String? ?? bareJid.toString(),
+    // Check if we want to send a stanza to our bare JID and replace it with null.
+    final from = stanza.attributes['from'] as String?;
+    final processedFrom =
+        from != null && from == _bareJidCallback() ? null : from;
+
+    final key = (
+      processedFrom,
       id,
       stanza.tag,
     );
@@ -91,4 +76,19 @@ class StanzaAwaiter {
       return false;
     });
   }
+
+  /// Checks if [stanza] represents a stanza that is awaited. Returns true, if [stanza]
+  /// is awaited. False, if not.
+  Future<bool> isAwaited(XMLNode stanza) async {
+    final id = stanza.attributes['id'] as String?;
+    if (id == null) return false;
+
+    final key = (
+      stanza.attributes['from'] as String?,
+      id,
+      stanza.tag,
+    );
+
+    return _lock.synchronized(() => _pending.containsKey(key));
+  }
 }

packages/moxxmpp/lib/src/connection.dart

@@ -15,7 +15,6 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
-import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/parser.dart';
 import 'package:moxxmpp/src/presence.dart';
@@ -26,12 +25,12 @@ import 'package:moxxmpp/src/settings.dart';
 import 'package:moxxmpp/src/socket.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
+import 'package:moxxmpp/src/util/incoming_queue.dart';
+import 'package:moxxmpp/src/util/queue.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
-import 'package:moxxmpp/src/xeps/xep_0198/negotiator.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/xep_0198.dart';
 import 'package:moxxmpp/src/xeps/xep_0352.dart';
-import 'package:synchronized/synchronized.dart';
 import 'package:uuid/uuid.dart';
 
 /// The states the XmppConnection can be in
@@ -50,16 +49,17 @@ enum XmppConnectionState {
   error
 }
 
-/// Metadata for [XmppConnection.sendStanza].
-enum StanzaFromType {
-  /// Add the full JID to the stanza as the from attribute
-  full,
+/// (The actual stanza handler, Name of the owning manager).
+typedef _StanzaHandlerWrapper = (StanzaHandler, String);
 
-  /// Add the bare JID to the stanza as the from attribute
-  bare,
-
-  /// Add no JID as the from attribute
-  none,
+/// Wrapper around [stanzaHandlerSortComparator] for [_StanzaHandlerWrapper].
+int _stanzaHandlerWrapperSortComparator(
+  _StanzaHandlerWrapper a,
+  _StanzaHandlerWrapper b,
+) {
+  final (ha, _) = a;
+  final (hb, _) = b;
+  return stanzaHandlerSortComparator(ha, hb);
 }
 
 /// This class is a connection to the server.
@@ -71,7 +71,11 @@ class XmppConnection {
     this._socket, {
     this.connectingTimeout = const Duration(minutes: 2),
   })  : _reconnectionPolicy = reconnectionPolicy,
-        _connectivityManager = connectivityManager {
+        _connectivityManager = connectivityManager,
+        assert(
+          _socket.getDataStream().isBroadcast,
+          "The socket's data stream must be a broadcast stream",
+        ) {
     // Allow the reconnection policy to perform reconnections by itself
     _reconnectionPolicy.register(
       _attemptReconnection,
@@ -90,10 +94,21 @@ class XmppConnection {
       },
     );
 
+    _stanzaAwaiter = StanzaAwaiter(
+      () => connectionSettings.jid.toBare().toString(),
+    );
+    _incomingStanzaQueue = IncomingStanzaQueue(handleXmlStream, _stanzaAwaiter);
     _socketStream = _socket.getDataStream();
-    // TODO(Unknown): Handle on done
-    _socketStream.transform(_streamParser).forEach(handleXmlStream);
-    _socket.getEventStream().listen(_handleSocketEvent);
+    _socketStream
+        .transform(_streamParser)
+        .forEach(_incomingStanzaQueue.addStanza);
+    _socketStream.listen(_handleOnDataCallbacks);
+    _socket.getEventStream().listen(handleSocketEvent);
+
+    _stanzaQueue = AsyncStanzaQueue(
+      _sendStanzaImpl,
+      _canSendData,
+    );
   }
 
   /// The state that the connection is currently in
@@ -117,16 +132,16 @@ class XmppConnection {
   final ConnectivityManager _connectivityManager;
 
   /// A helper for handling await semantics with stanzas
-  final StanzaAwaiter _stanzaAwaiter = StanzaAwaiter();
+  late final StanzaAwaiter _stanzaAwaiter;
 
   /// Sorted list of handlers that we call or incoming and outgoing stanzas
-  final List<StanzaHandler> _incomingStanzaHandlers =
+  final List<_StanzaHandlerWrapper> _incomingStanzaHandlers =
       List.empty(growable: true);
-  final List<StanzaHandler> _incomingPreStanzaHandlers =
+  final List<_StanzaHandlerWrapper> _incomingPreStanzaHandlers =
       List.empty(growable: true);
-  final List<StanzaHandler> _outgoingPreStanzaHandlers =
+  final List<_StanzaHandlerWrapper> _outgoingPreStanzaHandlers =
       List.empty(growable: true);
-  final List<StanzaHandler> _outgoingPostStanzaHandlers =
+  final List<_StanzaHandlerWrapper> _outgoingPostStanzaHandlers =
       List.empty(growable: true);
   final StreamController<XmppEvent> _eventStreamController =
       StreamController.broadcast();
@@ -165,10 +180,6 @@ class XmppConnection {
   T? getNegotiatorById<T extends XmppFeatureNegotiatorBase>(String id) =>
       _negotiationsHandler.getNegotiatorById<T>(id);
 
-  /// Prevent data from being passed to _currentNegotiator.negotiator while the negotiator
-  /// is still running.
-  final Lock _negotiationLock = Lock();
-
   /// The logger for the class
   final Logger _log = Logger('XmppConnection');
 
@@ -177,6 +188,10 @@ class XmppConnection {
 
   bool get isAuthenticated => _isAuthenticated;
 
+  late final IncomingStanzaQueue _incomingStanzaQueue;
+
+  late final AsyncStanzaQueue _stanzaQueue;
+
   /// Returns the JID we authenticate with and add the resource that we have bound.
   JID _getJidWithResource() {
     assert(_resource.isNotEmpty, 'The resource must not be empty');
@@ -204,18 +219,25 @@ class XmppConnection {
 
       _xmppManagers[manager.id] = manager;
 
-      _incomingStanzaHandlers.addAll(manager.getIncomingStanzaHandlers());
-      _incomingPreStanzaHandlers.addAll(manager.getIncomingPreStanzaHandlers());
-      _outgoingPreStanzaHandlers.addAll(manager.getOutgoingPreStanzaHandlers());
-      _outgoingPostStanzaHandlers
-          .addAll(manager.getOutgoingPostStanzaHandlers());
+      _incomingStanzaHandlers.addAll(
+        manager.getIncomingStanzaHandlers().map((h) => (h, manager.name)),
+      );
+      _incomingPreStanzaHandlers.addAll(
+        manager.getIncomingPreStanzaHandlers().map((h) => (h, manager.name)),
+      );
+      _outgoingPreStanzaHandlers.addAll(
+        manager.getOutgoingPreStanzaHandlers().map((h) => (h, manager.name)),
+      );
+      _outgoingPostStanzaHandlers.addAll(
+        manager.getOutgoingPostStanzaHandlers().map((h) => (h, manager.name)),
+      );
     }
 
     // Sort them
-    _incomingStanzaHandlers.sort(stanzaHandlerSortComparator);
-    _incomingPreStanzaHandlers.sort(stanzaHandlerSortComparator);
-    _outgoingPreStanzaHandlers.sort(stanzaHandlerSortComparator);
-    _outgoingPostStanzaHandlers.sort(stanzaHandlerSortComparator);
+    _incomingStanzaHandlers.sort(_stanzaHandlerWrapperSortComparator);
+    _incomingPreStanzaHandlers.sort(_stanzaHandlerWrapperSortComparator);
+    _outgoingPreStanzaHandlers.sort(_stanzaHandlerWrapperSortComparator);
+    _outgoingPostStanzaHandlers.sort(_stanzaHandlerWrapperSortComparator);
 
     // Run the post register callbacks
     for (final manager in _xmppManagers.values) {
@@ -296,6 +318,13 @@ class XmppConnection {
     return getManagerById(csiManager);
   }
 
+  /// Called whenever we receive data on the socket.
+  Future<void> _handleOnDataCallbacks(String _) async {
+    for (final manager in _xmppManagers.values) {
+      unawaited(manager.onData());
+    }
+  }
+
   /// Attempts to reconnect to the server by following an exponential backoff.
   Future<void> _attemptReconnection() async {
     _log.finest('_attemptReconnection: Setting state to notConnected');
@@ -318,7 +347,7 @@ class XmppConnection {
 
   /// Called when a stream ending error has occurred
   Future<void> handleError(XmppError error) async {
-    _log.severe('handleError called with ${error.toString()}');
+    _log.severe('handleError called with $error');
 
     // Whenever we encounter an error that would trigger a reconnection attempt while
     // the connection result is being awaited, don't attempt a reconnection but instead
@@ -368,7 +397,8 @@ class XmppConnection {
   }
 
   /// Called whenever the socket creates an event
-  Future<void> _handleSocketEvent(XmppSocketEvent event) async {
+  @visibleForTesting
+  Future<void> handleSocketEvent(XmppSocketEvent event) async {
     if (event is XmppSocketErrorEvent) {
       await handleError(SocketError(event));
     } else if (event is XmppSocketClosureEvent) {
@@ -410,137 +440,144 @@ class XmppConnection {
 
   /// Returns true if we can send data through the socket.
   Future<bool> _canSendData() async {
-    return [XmppConnectionState.connected, XmppConnectionState.connecting]
-        .contains(await getConnectionState());
+    return await getConnectionState() == XmppConnectionState.connected;
   }
 
-  /// Sends a [stanza] to the server. If stream management is enabled, then keeping track
-  /// of the stanza is taken care of. Returns a Future that resolves when we receive a
-  /// response to the stanza.
-  ///
-  /// If addFrom is true, then a 'from' attribute will be added to the stanza if
-  /// [stanza] has none.
-  /// If addId is true, then an 'id' attribute will be added to the stanza if [stanza] has
-  /// none.
+  /// Sends a stanza described by [details] to the server. Until sent, the stanza is
+  /// kept in a queue, that is flushed after going online again. If Stream Management
+  /// is active, stanza's acknowledgement is tracked.
   // TODO(Unknown): if addId = false, the function crashes.
-  Future<XMLNode> sendStanza(
-    Stanza stanza, {
-    StanzaFromType addFrom = StanzaFromType.full,
-    bool addId = true,
-    bool awaitable = true,
-    bool encrypted = false,
-    bool forceEncryption = false,
-  }) async {
+  Future<XMLNode?> sendStanza(StanzaDetails details) async {
     assert(
-      implies(addId == false && stanza.id == null, !awaitable),
-      'Cannot await a stanza with no id',
+      implies(
+        details.awaitable,
+        details.stanza.id != null && details.stanza.id!.isNotEmpty ||
+            details.addId,
+      ),
+      'An awaitable stanza must have an id',
     );
 
-    // Add extra data in case it was not set
-    var stanza_ = stanza;
-    if (addId && (stanza_.id == null || stanza_.id == '')) {
-      stanza_ = stanza.copyWith(id: generateId());
+    final completer = details.awaitable ? Completer<XMLNode>() : null;
+    final entry = StanzaQueueEntry(
+      details,
+      completer,
+    );
+
+    if (details.bypassQueue) {
+      await _sendStanzaImpl(entry);
+    } else {
+      await _stanzaQueue.enqueueStanza(entry);
     }
-    if (addFrom != StanzaFromType.none &&
-        (stanza_.from == null || stanza_.from == '')) {
-      switch (addFrom) {
-        case StanzaFromType.full:
-          {
-            stanza_ = stanza_.copyWith(
-              from: _getJidWithResource().toString(),
-            );
-          }
-          break;
-        case StanzaFromType.bare:
-          {
-            stanza_ = stanza_.copyWith(
-              from: connectionSettings.jid.toBare().toString(),
-            );
-          }
-          break;
-        case StanzaFromType.none:
-          break;
-      }
+
+    return completer?.future;
+  }
+
+  Future<void> _sendStanzaImpl(StanzaQueueEntry entry) async {
+    final details = entry.details;
+    var newStanza = details.stanza;
+
+    // Generate an id, if requested
+    if (details.addId && (newStanza.id == null || newStanza.id == '')) {
+      newStanza = newStanza.copyWith(id: generateId());
     }
-    stanza_ = stanza_.copyWith(
+
+    // NOTE: Originally, we handled adding a "from" attribute to the stanza here.
+    //       However, this is not neccessary as RFC 6120 states:
+    //
+    //       > When a server receives an XML stanza from a connected client, the
+    //       > server MUST add a 'from' attribute to the stanza or override the
+    //       > 'from' attribute specified by the client, where the value of the
+    //       > 'from' attribute MUST be the full JID
+    //       > (<localpart@domainpart/resource>) determined by the server for
+    //       > the connected resource that generated the stanza (see
+    //       > Section 4.3.6), or the bare JID (<localpart@domainpart>) in the
+    //       > case of subscription-related presence stanzas (see [XMPP-IM]).
+    //
+    //       This means that even if we add a "from" attribute, the server will discard
+    //       it. If we don't specify it, then the server will add the correct value
+    //       itself.
+
+    // Add the correct stanza namespace
+    newStanza = newStanza.copyWith(
       xmlns: _negotiationsHandler.getStanzaNamespace(),
     );
 
+    // Run pre-send handlers
     _log.fine('Running pre stanza handlers..');
     final data = await _runOutgoingPreStanzaHandlers(
-      stanza_,
+      newStanza,
       initial: StanzaHandlerData(
         false,
         false,
-        null,
-        stanza_,
-        encrypted: encrypted,
-        forceEncryption: forceEncryption,
+        newStanza,
+        details.extensions ?? TypedMap(),
+        encrypted: details.encrypted,
+        shouldEncrypt: details.shouldEncrypt,
+        forceEncryption: details.forceEncryption,
       ),
     );
     _log.fine('Done');
 
+    // Cancel sending, if the pre-send handlers indicated it.
     if (data.cancel) {
       _log.fine('A stanza handler indicated that it wants to cancel sending.');
       await _sendEvent(StanzaSendingCancelledEvent(data));
-      return Stanza(
-        tag: data.stanza.tag,
-        to: data.stanza.from,
-        from: data.stanza.to,
-        attributes: <String, String>{
-          'type': 'error',
-          ...data.stanza.id != null
-              ? {
-                  'id': data.stanza.id!,
-                }
-              : {},
-        },
-      );
+
+      // Resolve the future, if one was given.
+      if (details.awaitable) {
+        entry.completer!.complete(
+          Stanza(
+            tag: data.stanza.tag,
+            to: data.stanza.from,
+            from: data.stanza.to,
+            attributes: <String, String>{
+              'type': 'error',
+              if (data.stanza.id != null) 'id': data.stanza.id!,
+            },
+          ),
+        );
+      }
+      return;
     }
 
+    // Log the (raw) stanza
     final prefix = data.encrypted ? '(Encrypted) ' : '';
-    _log.finest('==> $prefix${stanza_.toXml()}');
+    _log.finest('==> $prefix${newStanza.toXml()}');
 
-    final stanzaString = data.stanza.toXml();
-
-    // ignore: cascade_invocations
-    _log.fine('Attempting to acquire lock for ${data.stanza.id}...');
-    // TODO(PapaTutuWawa): Handle this much more graceful
-    var future = Future.value(XMLNode(tag: 'not-used'));
-    if (awaitable) {
-      future = await _stanzaAwaiter.addPending(
+    if (details.awaitable) {
+      await _stanzaAwaiter
+          .addPending(
         // A stanza with no to attribute is for direct processing by the server. As such,
         // we can correlate it by just *assuming* we have that attribute
         // (RFC 6120 Section 8.1.1.1)
-        data.stanza.to ?? connectionSettings.jid.toBare().toString(),
+        data.stanza.to,
         data.stanza.id!,
         data.stanza.tag,
-      );
+      )
+          .then((result) {
+        entry.completer!.complete(result);
+      });
     }
 
-    // This uses the StreamManager to behave like a send queue
     if (await _canSendData()) {
-      _socket.write(stanzaString);
-
-      // Try to ack every stanza
-      // NOTE: Here we have send an Ack request nonza. This is now done by StreamManagementManager when receiving the StanzaSentEvent
+      _socket.write(data.stanza.toXml());
     } else {
-      _log.fine('_canSendData() returned false.');
+      _log.fine('Not sending data as _canSendData() returned false.');
     }
 
+    // Run post-send handlers
     _log.fine('Running post stanza handlers..');
     await _runOutgoingPostStanzaHandlers(
-      stanza_,
+      newStanza,
       initial: StanzaHandlerData(
         false,
         false,
-        null,
-        stanza_,
+        newStanza,
+        details.postSendExtensions ?? TypedMap<StanzaHandlerExtension>(),
+        encrypted: data.encrypted,
       ),
     );
     _log.fine('Done');
-
-    return future;
   }
 
   /// Called when we timeout during connecting
@@ -564,21 +601,29 @@ class XmppConnection {
     // Set the new routing state
     _updateRoutingState(RoutingState.handleStanzas);
 
-    // Set the connection state
-    await _setConnectionState(XmppConnectionState.connected);
-
     // Enable reconnections
     if (_enableReconnectOnSuccess) {
       await _reconnectionPolicy.setShouldReconnect(true);
     }
 
+    // Tell consumers of the event stream that we're done with stream feature
+    // negotiations
+    await _sendEvent(
+      StreamNegotiationsDoneEvent(
+        getManagerById<StreamManagementManager>(smManager)?.streamResumed ??
+            false,
+      ),
+    );
+
+    // Set the connection state
+    await _setConnectionState(XmppConnectionState.connected);
+
     // Resolve the connection completion future
     _connectionCompleter?.complete(const Result(true));
     _connectionCompleter = null;
 
-    // Tell consumers of the event stream that we're done with stream feature
-    // negotiations
-    await _sendEvent(StreamNegotiationsDoneEvent());
+    // Flush the stanza send queue
+    await _stanzaQueue.restart();
   }
 
   /// Sets the connection state to [state] and triggers an event of type
@@ -606,15 +651,10 @@ class XmppConnection {
       _destroyConnectingTimer();
     }
 
-    final sm =
-        _negotiationsHandler.getNegotiatorById<StreamManagementNegotiator>(
-      streamManagementNegotiator,
-    );
     await _sendEvent(
       ConnectionStateChangedEvent(
         state,
         oldState,
-        sm?.isResumed ?? false,
       ),
     );
   }
@@ -645,15 +685,30 @@ class XmppConnection {
   /// call its callback and end the processing if the callback returned true; continue
   /// if it returned false.
   Future<StanzaHandlerData> _runStanzaHandlers(
-    List<StanzaHandler> handlers,
+    List<_StanzaHandlerWrapper> handlers,
     Stanza stanza, {
     StanzaHandlerData? initial,
   }) async {
-    var state = initial ?? StanzaHandlerData(false, false, null, stanza);
-    for (final handler in handlers) {
+    var state = initial ?? StanzaHandlerData(false, false, stanza, TypedMap());
+    for (final handlerRaw in handlers) {
+      final (handler, managerName) = handlerRaw;
       if (handler.matches(state.stanza)) {
-        state = await handler.callback(state.stanza, state);
-        if (state.done || state.cancel) return state;
+        _log.finest(
+          'Running handler for ${stanza.tag} (${stanza.attributes["id"]}) of $managerName',
+        );
+        try {
+          state = await handler.callback(state.stanza, state);
+        } catch (ex) {
+          _log.severe(
+            'Handler from $managerName for ${stanza.tag} (${stanza.attributes["id"]}) failed with "$ex"',
+          );
+        }
+        if (state.done || state.cancel) {
+          _log.finest(
+            'Processing ended early for ${stanza.tag} (${stanza.attributes["id"]}) by $managerName',
+          );
+          return state;
+        }
       }
     }
 
@@ -724,14 +779,20 @@ class XmppConnection {
     // it.
     final incomingPreHandlers = await _runIncomingPreStanzaHandlers(stanza);
     final prefix = incomingPreHandlers.encrypted &&
-            incomingPreHandlers.other['encryption_error'] == null
+            incomingPreHandlers.encryptionError == null
         ? '(Encrypted) '
         : '';
     _log.finest('<== $prefix${incomingPreHandlers.stanza.toXml()}');
 
+    if (incomingPreHandlers.skip) {
+      _log.fine(
+        'Not processing stanza (${incomingPreHandlers.stanza.tag}, ${incomingPreHandlers.stanza.id}) due to skip=true.',
+      );
+      return;
+    }
+
     final awaited = await _stanzaAwaiter.onData(
       incomingPreHandlers.stanza,
-      connectionSettings.jid.toBare(),
     );
     if (awaited) {
       return;
@@ -743,10 +804,11 @@ class XmppConnection {
       initial: StanzaHandlerData(
         false,
         incomingPreHandlers.cancel,
-        incomingPreHandlers.cancelReason,
         incomingPreHandlers.stanza,
+        incomingPreHandlers.extensions,
         encrypted: incomingPreHandlers.encrypted,
-        other: incomingPreHandlers.other,
+        encryptionError: incomingPreHandlers.encryptionError,
+        cancelReason: incomingPreHandlers.cancelReason,
       ),
     );
     if (!incomingHandlers.done) {
@@ -789,14 +851,12 @@ class XmppConnection {
         // causing (a) the negotiator to become confused and (b) the stanzas/nonzas to be
         // missed. This causes the data to wait while the negotiator is running and thus
         // prevent this issue.
-        await _negotiationLock.synchronized(() async {
-          if (_routingState != RoutingState.negotiating) {
-            unawaited(handleXmlStream(event));
-            return;
-          }
+        if (_routingState != RoutingState.negotiating) {
+          unawaited(handleXmlStream(event));
+          return;
+        }
 
-          await _negotiationsHandler.negotiate(event);
-        });
+        await _negotiationsHandler.negotiate(event);
         break;
       case RoutingState.handleStanzas:
         await _handleStanza(node);
@@ -835,7 +895,7 @@ class XmppConnection {
     await _reconnectionPolicy.setShouldReconnect(false);
 
     if (triggeredByUser) {
-      getPresenceManager()?.sendUnavailablePresence();
+      await getPresenceManager()?.sendUnavailablePresence();
     }
 
     _socket.prepareDisconnect();

packages/moxxmpp/lib/src/events.dart

@@ -4,28 +4,20 @@ import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/roster/roster.dart';
 import 'package:moxxmpp/src/stanza.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 import 'package:moxxmpp/src/xeps/xep_0060/xep_0060.dart';
-import 'package:moxxmpp/src/xeps/xep_0066.dart';
-import 'package:moxxmpp/src/xeps/xep_0085.dart';
-import 'package:moxxmpp/src/xeps/xep_0334.dart';
-import 'package:moxxmpp/src/xeps/xep_0359.dart';
-import 'package:moxxmpp/src/xeps/xep_0385.dart';
-import 'package:moxxmpp/src/xeps/xep_0424.dart';
-import 'package:moxxmpp/src/xeps/xep_0444.dart';
-import 'package:moxxmpp/src/xeps/xep_0446.dart';
-import 'package:moxxmpp/src/xeps/xep_0447.dart';
-import 'package:moxxmpp/src/xeps/xep_0461.dart';
+import 'package:moxxmpp/src/xeps/xep_0084.dart';
+import 'package:moxxmpp/src/xeps/xep_0333.dart';
 
 abstract class XmppEvent {}
 
 /// Triggered when the connection state of the XmppConnection has
 /// changed.
 class ConnectionStateChangedEvent extends XmppEvent {
-  ConnectionStateChangedEvent(this.state, this.before, this.resumed);
+  ConnectionStateChangedEvent(this.state, this.before);
   final XmppConnectionState before;
   final XmppConnectionState state;
-  final bool resumed;
 
   /// Indicates whether the connection state switched from a not connected state to a
   /// connected state.
@@ -75,58 +67,42 @@ class RosterUpdatedEvent extends XmppEvent {
 
 /// Triggered when a message is received
 class MessageEvent extends XmppEvent {
-  MessageEvent({
-    required this.body,
-    required this.fromJid,
-    required this.toJid,
-    required this.sid,
-    required this.stanzaId,
-    required this.isCarbon,
-    required this.deliveryReceiptRequested,
-    required this.isMarkable,
-    required this.encrypted,
-    required this.other,
-    this.error,
+  MessageEvent(
+    this.from,
+    this.to,
+    this.encrypted,
+    this.extensions, {
+    this.id,
     this.type,
-    this.oob,
-    this.sfs,
-    this.sims,
-    this.reply,
-    this.chatState,
-    this.fun,
-    this.funReplacement,
-    this.funCancellation,
-    this.messageRetraction,
-    this.messageCorrectionId,
-    this.messageReactions,
-    this.messageProcessingHints,
-    this.stickerPackId,
+    this.error,
+    this.encryptionError,
   });
-  final StanzaError? error;
-  final String body;
-  final JID fromJid;
-  final JID toJid;
-  final String sid;
+
+  /// The from attribute of the message.
+  final JID from;
+
+  /// The to attribute of the message.
+  final JID to;
+
+  /// The id attribute of the message.
+  final String? id;
+
+  /// The type attribute of the message.
   final String? type;
-  final StableStanzaId stanzaId;
-  final bool isCarbon;
-  final bool deliveryReceiptRequested;
-  final bool isMarkable;
-  final OOBData? oob;
-  final StatelessFileSharingData? sfs;
-  final StatelessMediaSharingData? sims;
-  final ReplyData? reply;
-  final ChatState? chatState;
-  final FileMetadataData? fun;
-  final String? funReplacement;
-  final String? funCancellation;
+
+  final StanzaError? error;
+
+  /// Flag indicating whether the message was encrypted.
   final bool encrypted;
-  final MessageRetractionData? messageRetraction;
-  final String? messageCorrectionId;
-  final MessageReactions? messageReactions;
-  final List<MessageProcessingHint>? messageProcessingHints;
-  final String? stickerPackId;
-  final Map<String, dynamic> other;
+
+  /// The error in case an encryption error occurred.
+  final Object? encryptionError;
+
+  /// Data added by other handlers.
+  final TypedMap<StanzaHandlerExtension> extensions;
+
+  /// Shorthand for extensions.get<T>().
+  T? get<T>() => extensions.get<T>();
 }
 
 /// Triggered when a client responds to our delivery receipt request
@@ -137,13 +113,19 @@ class DeliveryReceiptReceivedEvent extends XmppEvent {
 }
 
 class ChatMarkerEvent extends XmppEvent {
-  ChatMarkerEvent({
-    required this.type,
-    required this.from,
-    required this.id,
-  });
+  ChatMarkerEvent(
+    this.from,
+    this.type,
+    this.id,
+  );
+
+  /// The entity that sent the chat marker.
   final JID from;
-  final String type;
+
+  /// The type of chat marker that was sent.
+  final ChatMarker type;
+
+  /// The id of the message that the marker applies to.
   final String id;
 }
 
@@ -167,13 +149,6 @@ class ResourceBoundEvent extends XmppEvent {
   final String resource;
 }
 
-/// Triggered when we receive presence
-class PresenceReceivedEvent extends XmppEvent {
-  PresenceReceivedEvent(this.jid, this.presence);
-  final JID jid;
-  final Stanza presence;
-}
-
 /// Triggered when we are starting an connection attempt
 class ConnectingEvent extends XmppEvent {}
 
@@ -191,15 +166,31 @@ class SubscriptionRequestReceivedEvent extends XmppEvent {
   final JID from;
 }
 
-/// Triggered when we receive a new or updated avatar
-class AvatarUpdatedEvent extends XmppEvent {
-  AvatarUpdatedEvent({
-    required this.jid,
-    required this.base64,
-    required this.hash,
-  });
-  final String jid;
-  final String base64;
+/// Triggered when we receive a new or updated avatar via XEP-0084
+class UserAvatarUpdatedEvent extends XmppEvent {
+  UserAvatarUpdatedEvent(
+    this.jid,
+    this.metadata,
+  );
+
+  /// The JID of the user updating their avatar.
+  final JID jid;
+
+  /// The metadata of the avatar.
+  final List<UserAvatarMetadata> metadata;
+}
+
+/// Triggered when we receive a new or updated avatar via XEP-0054
+class VCardAvatarUpdatedEvent extends XmppEvent {
+  VCardAvatarUpdatedEvent(
+    this.jid,
+    this.hash,
+  );
+
+  /// The JID of the entity that updated their avatar.
+  final JID jid;
+
+  /// The SHA-1 hash of the avatar.
   final String hash;
 }
 
@@ -257,4 +248,10 @@ class NonRecoverableErrorEvent extends XmppEvent {
 }
 
 /// Triggered when the stream negotiations are done.
-class StreamNegotiationsDoneEvent extends XmppEvent {}
+class StreamNegotiationsDoneEvent extends XmppEvent {
+  StreamNegotiationsDoneEvent(this.resumed);
+
+  /// Flag indicating whether we resumed a previous stream (true) or are in a completely
+  /// new stream (false).
+  final bool resumed;
+}

packages/moxxmpp/lib/src/iq.dart

@@ -23,9 +23,11 @@ Future<void> handleUnhandledStanza(
     );
 
     await conn.sendStanza(
-      stanza,
-      awaitable: false,
-      forceEncryption: data.encrypted,
+      StanzaDetails(
+        stanza,
+        awaitable: false,
+        forceEncryption: data.encrypted,
+      ),
     );
   }
 }

packages/moxxmpp/lib/src/jid.dart

@@ -55,14 +55,17 @@ class JID {
 
   /// Converts the JID into a bare JID.
   JID toBare() {
-    if (isBare()) return this;
-
     return JID(local, domain, '');
   }
 
   /// Converts the JID into one with a resource part of [resource].
   JID withResource(String resource) => JID(local, domain, resource);
 
+  /// Convert the JID into the JID of the domain. For example, converts alice@example.org/abc123 to example.org.
+  JID toDomain() {
+    return JID('', domain, '');
+  }
+
   /// Compares the JID with [other]. This function assumes that JID and [other]
   /// are bare, i.e. only the domain- and localparts are compared. If [ensureBare]
   /// is optionally set to true, then [other] MUST be bare. Otherwise, false is returned.

packages/moxxmpp/lib/src/managers/attributes.dart

@@ -23,14 +23,7 @@ class XmppManagerAttributes {
   });
 
   /// Send a stanza whose response can be awaited.
-  final Future<XMLNode> Function(
-    Stanza stanza, {
-    StanzaFromType addFrom,
-    bool addId,
-    bool awaitable,
-    bool encrypted,
-    bool forceEncryption,
-  }) sendStanza;
+  final Future<XMLNode?> Function(StanzaDetails) sendStanza;
 
   /// Send a nonza.
   final void Function(XMLNode) sendNonza;

packages/moxxmpp/lib/src/managers/base.dart

@@ -5,6 +5,7 @@ import 'package:moxxmpp/src/managers/attributes.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
@@ -45,8 +46,7 @@ abstract class XmppManagerBase {
     );
 
     final result = await dm!.discoInfoQuery(
-      _managerAttributes.getConnectionSettings().jid.domain,
-      shouldEncrypt: false,
+      _managerAttributes.getConnectionSettings().jid.toDomain(),
     );
     if (result.isType<DiscoError>()) {
       return false;
@@ -80,6 +80,9 @@ abstract class XmppManagerBase {
   /// handler's priority, the earlier it is run.
   List<NonzaHandler> getNonzaHandlers() => [];
 
+  /// Whenever the socket receives data, this method is called, if it is non-null.
+  Future<void> onData() async {}
+
   /// Return a list of features that should be included in a disco response.
   List<String> getDiscoFeatures() => [];
 
@@ -165,9 +168,11 @@ abstract class XmppManagerBase {
     );
 
     await getAttributes().sendStanza(
-      stanza,
-      awaitable: false,
-      forceEncryption: data.encrypted,
+      StanzaDetails(
+        stanza,
+        awaitable: false,
+        forceEncryption: data.encrypted,
+      ),
     );
   }
 }

packages/moxxmpp/lib/src/managers/data.dart

@@ -1,74 +1,59 @@
-import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:moxxmpp/src/stanza.dart';
-import 'package:moxxmpp/src/xeps/xep_0066.dart';
-import 'package:moxxmpp/src/xeps/xep_0085.dart';
-import 'package:moxxmpp/src/xeps/xep_0203.dart';
-import 'package:moxxmpp/src/xeps/xep_0359.dart';
-import 'package:moxxmpp/src/xeps/xep_0380.dart';
-import 'package:moxxmpp/src/xeps/xep_0385.dart';
-import 'package:moxxmpp/src/xeps/xep_0424.dart';
-import 'package:moxxmpp/src/xeps/xep_0444.dart';
-import 'package:moxxmpp/src/xeps/xep_0446.dart';
-import 'package:moxxmpp/src/xeps/xep_0447.dart';
-import 'package:moxxmpp/src/xeps/xep_0461.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
-part 'data.freezed.dart';
+abstract class StanzaHandlerExtension {}
 
-@freezed
-class StanzaHandlerData with _$StanzaHandlerData {
-  factory StanzaHandlerData(
-    // Indicates to the runner that processing is now done. This means that all
-    // pre-processing is done and no other handlers should be consulted.
-    bool done,
-    // Indicates to the runner that processing is to be cancelled and no further handlers
-    // should run. The stanza also will not be sent.
-    bool cancel,
-    // The reason why we cancelled the processing and sending
-    dynamic cancelReason,
-    // The stanza that is being dealt with. SHOULD NOT be overwritten, unless it is absolutely
-    // necessary, e.g. with Message Carbons or OMEMO
-    Stanza stanza, {
-    // Whether the stanza is retransmitted. Only useful in the context of outgoing
-    // stanza handlers. MUST NOT be overwritten.
-    @Default(false) bool retransmitted,
-    StatelessMediaSharingData? sims,
-    StatelessFileSharingData? sfs,
-    OOBData? oob,
-    StableStanzaId? stableId,
-    ReplyData? reply,
-    ChatState? chatState,
-    @Default(false) bool isCarbon,
-    @Default(false) bool deliveryReceiptRequested,
-    @Default(false) bool isMarkable,
-    // File Upload Notifications
-    // A notification
-    FileMetadataData? fun,
-    // The stanza id this replaces
-    String? funReplacement,
-    // The stanza id this cancels
-    String? funCancellation,
-    // Whether the stanza was received encrypted
-    @Default(false) bool encrypted,
-    // If true, forces the encryption manager to encrypt to the JID, even if it
-    // would not normally. In the case of OMEMO: If shouldEncrypt returns false
-    // but forceEncryption is true, then the OMEMO manager will try to encrypt
-    // to the JID anyway.
-    @Default(false) bool forceEncryption,
-    // The stated type of encryption used, if any was used
-    ExplicitEncryptionType? encryptionType,
-    // Delayed Delivery
-    DelayedDelivery? delayedDelivery,
-    // This is for stanza handlers that are not part of the XMPP library but still need
-    // pass data around.
-    @Default(<String, dynamic>{}) Map<String, dynamic> other,
-    // If non-null, then it indicates the origin Id of the message that should be
-    // retracted
-    MessageRetractionData? messageRetraction,
-    // If non-null, then the message is a correction for the specified stanza Id
-    String? lastMessageCorrectionSid,
-    // Reactions data
-    MessageReactions? messageReactions,
-    // The Id of the sticker pack this sticker belongs to
-    String? stickerPackId,
-  }) = _StanzaHandlerData;
+class StanzaHandlerData {
+  StanzaHandlerData(
+    this.done,
+    this.cancel,
+    this.stanza,
+    this.extensions, {
+    this.cancelReason,
+    this.encryptionError,
+    this.encrypted = false,
+    this.forceEncryption = false,
+    this.shouldEncrypt = true,
+    this.skip = false,
+  });
+
+  /// Indicates to the runner that processing is now done. This means that all
+  /// pre-processing is done and no other handlers should be consulted.
+  bool done;
+
+  /// Only useful in combination with [done] = true: When [skip] is set to true and
+  /// this [StanzaHandlerData] object is returned from a IncomingPreStanzaHandler, then
+  /// moxxmpp will skip checking whether the stanza was awaited and will not run any actual
+  /// IncomingStanzaHandler callbacks.
+  bool skip;
+
+  /// Indicates to the runner that processing is to be cancelled and no further handlers
+  /// should run. The stanza also will not be sent.
+  bool cancel;
+
+  /// The reason why we cancelled the processing and sending.
+  Object? cancelReason;
+
+  /// The reason why an encryption or decryption failed.
+  Object? encryptionError;
+
+  /// The stanza that is being dealt with. SHOULD NOT be overwritten, unless it is
+  /// absolutely necessary, e.g. with Message Carbons or OMEMO.
+  Stanza stanza;
+
+  /// Whether the stanza is already encrypted
+  bool encrypted;
+
+  // If true, forces the encryption manager to encrypt to the JID, even if it
+  // would not normally. In the case of OMEMO: If shouldEncrypt returns false
+  // but forceEncryption is true, then the OMEMO manager will try to encrypt
+  // to the JID anyway.
+  bool forceEncryption;
+
+  /// Flag indicating whether a E2EE implementation should encrypt the stanza (true)
+  /// or not (false).
+  bool shouldEncrypt;
+
+  /// Additional data from other managers.
+  final TypedMap<StanzaHandlerExtension> extensions;
 }

packages/moxxmpp/lib/src/managers/data.freezed.dart

@@ -1,747 +0,0 @@
-// coverage:ignore-file
-// GENERATED CODE - DO NOT MODIFY BY HAND
-// ignore_for_file: type=lint
-// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target
-
-part of 'data.dart';
-
-// **************************************************************************
-// FreezedGenerator
-// **************************************************************************
-
-T _$identity<T>(T value) => value;
-
-final _privateConstructorUsedError = UnsupportedError(
-    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#custom-getters-and-methods');
-
-/// @nodoc
-mixin _$StanzaHandlerData {
-// Indicates to the runner that processing is now done. This means that all
-// pre-processing is done and no other handlers should be consulted.
-  bool get done =>
-      throw _privateConstructorUsedError; // Indicates to the runner that processing is to be cancelled and no further handlers
-// should run. The stanza also will not be sent.
-  bool get cancel =>
-      throw _privateConstructorUsedError; // The reason why we cancelled the processing and sending
-  dynamic get cancelReason =>
-      throw _privateConstructorUsedError; // The stanza that is being dealt with. SHOULD NOT be overwritten, unless it is absolutely
-// necessary, e.g. with Message Carbons or OMEMO
-  Stanza get stanza =>
-      throw _privateConstructorUsedError; // Whether the stanza is retransmitted. Only useful in the context of outgoing
-// stanza handlers. MUST NOT be overwritten.
-  bool get retransmitted => throw _privateConstructorUsedError;
-  StatelessMediaSharingData? get sims => throw _privateConstructorUsedError;
-  StatelessFileSharingData? get sfs => throw _privateConstructorUsedError;
-  OOBData? get oob => throw _privateConstructorUsedError;
-  StableStanzaId? get stableId => throw _privateConstructorUsedError;
-  ReplyData? get reply => throw _privateConstructorUsedError;
-  ChatState? get chatState => throw _privateConstructorUsedError;
-  bool get isCarbon => throw _privateConstructorUsedError;
-  bool get deliveryReceiptRequested => throw _privateConstructorUsedError;
-  bool get isMarkable =>
-      throw _privateConstructorUsedError; // File Upload Notifications
-// A notification
-  FileMetadataData? get fun =>
-      throw _privateConstructorUsedError; // The stanza id this replaces
-  String? get funReplacement =>
-      throw _privateConstructorUsedError; // The stanza id this cancels
-  String? get funCancellation =>
-      throw _privateConstructorUsedError; // Whether the stanza was received encrypted
-  bool get encrypted =>
-      throw _privateConstructorUsedError; // If true, forces the encryption manager to encrypt to the JID, even if it
-// would not normally. In the case of OMEMO: If shouldEncrypt returns false
-// but forceEncryption is true, then the OMEMO manager will try to encrypt
-// to the JID anyway.
-  bool get forceEncryption =>
-      throw _privateConstructorUsedError; // The stated type of encryption used, if any was used
-  ExplicitEncryptionType? get encryptionType =>
-      throw _privateConstructorUsedError; // Delayed Delivery
-  DelayedDelivery? get delayedDelivery =>
-      throw _privateConstructorUsedError; // This is for stanza handlers that are not part of the XMPP library but still need
-// pass data around.
-  Map<String, dynamic> get other =>
-      throw _privateConstructorUsedError; // If non-null, then it indicates the origin Id of the message that should be
-// retracted
-  MessageRetractionData? get messageRetraction =>
-      throw _privateConstructorUsedError; // If non-null, then the message is a correction for the specified stanza Id
-  String? get lastMessageCorrectionSid =>
-      throw _privateConstructorUsedError; // Reactions data
-  MessageReactions? get messageReactions =>
-      throw _privateConstructorUsedError; // The Id of the sticker pack this sticker belongs to
-  String? get stickerPackId => throw _privateConstructorUsedError;
-
-  @JsonKey(ignore: true)
-  $StanzaHandlerDataCopyWith<StanzaHandlerData> get copyWith =>
-      throw _privateConstructorUsedError;
-}
-
-/// @nodoc
-abstract class $StanzaHandlerDataCopyWith<$Res> {
-  factory $StanzaHandlerDataCopyWith(
-          StanzaHandlerData value, $Res Function(StanzaHandlerData) then) =
-      _$StanzaHandlerDataCopyWithImpl<$Res>;
-  $Res call(
-      {bool done,
-      bool cancel,
-      dynamic cancelReason,
-      Stanza stanza,
-      bool retransmitted,
-      StatelessMediaSharingData? sims,
-      StatelessFileSharingData? sfs,
-      OOBData? oob,
-      StableStanzaId? stableId,
-      ReplyData? reply,
-      ChatState? chatState,
-      bool isCarbon,
-      bool deliveryReceiptRequested,
-      bool isMarkable,
-      FileMetadataData? fun,
-      String? funReplacement,
-      String? funCancellation,
-      bool encrypted,
-      bool forceEncryption,
-      ExplicitEncryptionType? encryptionType,
-      DelayedDelivery? delayedDelivery,
-      Map<String, dynamic> other,
-      MessageRetractionData? messageRetraction,
-      String? lastMessageCorrectionSid,
-      MessageReactions? messageReactions,
-      String? stickerPackId});
-}
-
-/// @nodoc
-class _$StanzaHandlerDataCopyWithImpl<$Res>
-    implements $StanzaHandlerDataCopyWith<$Res> {
-  _$StanzaHandlerDataCopyWithImpl(this._value, this._then);
-
-  final StanzaHandlerData _value;
-  // ignore: unused_field
-  final $Res Function(StanzaHandlerData) _then;
-
-  @override
-  $Res call({
-    Object? done = freezed,
-    Object? cancel = freezed,
-    Object? cancelReason = freezed,
-    Object? stanza = freezed,
-    Object? retransmitted = freezed,
-    Object? sims = freezed,
-    Object? sfs = freezed,
-    Object? oob = freezed,
-    Object? stableId = freezed,
-    Object? reply = freezed,
-    Object? chatState = freezed,
-    Object? isCarbon = freezed,
-    Object? deliveryReceiptRequested = freezed,
-    Object? isMarkable = freezed,
-    Object? fun = freezed,
-    Object? funReplacement = freezed,
-    Object? funCancellation = freezed,
-    Object? encrypted = freezed,
-    Object? forceEncryption = freezed,
-    Object? encryptionType = freezed,
-    Object? delayedDelivery = freezed,
-    Object? other = freezed,
-    Object? messageRetraction = freezed,
-    Object? lastMessageCorrectionSid = freezed,
-    Object? messageReactions = freezed,
-    Object? stickerPackId = freezed,
-  }) {
-    return _then(_value.copyWith(
-      done: done == freezed
-          ? _value.done
-          : done // ignore: cast_nullable_to_non_nullable
-              as bool,
-      cancel: cancel == freezed
-          ? _value.cancel
-          : cancel // ignore: cast_nullable_to_non_nullable
-              as bool,
-      cancelReason: cancelReason == freezed
-          ? _value.cancelReason
-          : cancelReason // ignore: cast_nullable_to_non_nullable
-              as dynamic,
-      stanza: stanza == freezed
-          ? _value.stanza
-          : stanza // ignore: cast_nullable_to_non_nullable
-              as Stanza,
-      retransmitted: retransmitted == freezed
-          ? _value.retransmitted
-          : retransmitted // ignore: cast_nullable_to_non_nullable
-              as bool,
-      sims: sims == freezed
-          ? _value.sims
-          : sims // ignore: cast_nullable_to_non_nullable
-              as StatelessMediaSharingData?,
-      sfs: sfs == freezed
-          ? _value.sfs
-          : sfs // ignore: cast_nullable_to_non_nullable
-              as StatelessFileSharingData?,
-      oob: oob == freezed
-          ? _value.oob
-          : oob // ignore: cast_nullable_to_non_nullable
-              as OOBData?,
-      stableId: stableId == freezed
-          ? _value.stableId
-          : stableId // ignore: cast_nullable_to_non_nullable
-              as StableStanzaId?,
-      reply: reply == freezed
-          ? _value.reply
-          : reply // ignore: cast_nullable_to_non_nullable
-              as ReplyData?,
-      chatState: chatState == freezed
-          ? _value.chatState
-          : chatState // ignore: cast_nullable_to_non_nullable
-              as ChatState?,
-      isCarbon: isCarbon == freezed
-          ? _value.isCarbon
-          : isCarbon // ignore: cast_nullable_to_non_nullable
-              as bool,
-      deliveryReceiptRequested: deliveryReceiptRequested == freezed
-          ? _value.deliveryReceiptRequested
-          : deliveryReceiptRequested // ignore: cast_nullable_to_non_nullable
-              as bool,
-      isMarkable: isMarkable == freezed
-          ? _value.isMarkable
-          : isMarkable // ignore: cast_nullable_to_non_nullable
-              as bool,
-      fun: fun == freezed
-          ? _value.fun
-          : fun // ignore: cast_nullable_to_non_nullable
-              as FileMetadataData?,
-      funReplacement: funReplacement == freezed
-          ? _value.funReplacement
-          : funReplacement // ignore: cast_nullable_to_non_nullable
-              as String?,
-      funCancellation: funCancellation == freezed
-          ? _value.funCancellation
-          : funCancellation // ignore: cast_nullable_to_non_nullable
-              as String?,
-      encrypted: encrypted == freezed
-          ? _value.encrypted
-          : encrypted // ignore: cast_nullable_to_non_nullable
-              as bool,
-      forceEncryption: forceEncryption == freezed
-          ? _value.forceEncryption
-          : forceEncryption // ignore: cast_nullable_to_non_nullable
-              as bool,
-      encryptionType: encryptionType == freezed
-          ? _value.encryptionType
-          : encryptionType // ignore: cast_nullable_to_non_nullable
-              as ExplicitEncryptionType?,
-      delayedDelivery: delayedDelivery == freezed
-          ? _value.delayedDelivery
-          : delayedDelivery // ignore: cast_nullable_to_non_nullable
-              as DelayedDelivery?,
-      other: other == freezed
-          ? _value.other
-          : other // ignore: cast_nullable_to_non_nullable
-              as Map<String, dynamic>,
-      messageRetraction: messageRetraction == freezed
-          ? _value.messageRetraction
-          : messageRetraction // ignore: cast_nullable_to_non_nullable
-              as MessageRetractionData?,
-      lastMessageCorrectionSid: lastMessageCorrectionSid == freezed
-          ? _value.lastMessageCorrectionSid
-          : lastMessageCorrectionSid // ignore: cast_nullable_to_non_nullable
-              as String?,
-      messageReactions: messageReactions == freezed
-          ? _value.messageReactions
-          : messageReactions // ignore: cast_nullable_to_non_nullable
-              as MessageReactions?,
-      stickerPackId: stickerPackId == freezed
-          ? _value.stickerPackId
-          : stickerPackId // ignore: cast_nullable_to_non_nullable
-              as String?,
-    ));
-  }
-}
-
-/// @nodoc
-abstract class _$$_StanzaHandlerDataCopyWith<$Res>
-    implements $StanzaHandlerDataCopyWith<$Res> {
-  factory _$$_StanzaHandlerDataCopyWith(_$_StanzaHandlerData value,
-          $Res Function(_$_StanzaHandlerData) then) =
-      __$$_StanzaHandlerDataCopyWithImpl<$Res>;
-  @override
-  $Res call(
-      {bool done,
-      bool cancel,
-      dynamic cancelReason,
-      Stanza stanza,
-      bool retransmitted,
-      StatelessMediaSharingData? sims,
-      StatelessFileSharingData? sfs,
-      OOBData? oob,
-      StableStanzaId? stableId,
-      ReplyData? reply,
-      ChatState? chatState,
-      bool isCarbon,
-      bool deliveryReceiptRequested,
-      bool isMarkable,
-      FileMetadataData? fun,
-      String? funReplacement,
-      String? funCancellation,
-      bool encrypted,
-      bool forceEncryption,
-      ExplicitEncryptionType? encryptionType,
-      DelayedDelivery? delayedDelivery,
-      Map<String, dynamic> other,
-      MessageRetractionData? messageRetraction,
-      String? lastMessageCorrectionSid,
-      MessageReactions? messageReactions,
-      String? stickerPackId});
-}
-
-/// @nodoc
-class __$$_StanzaHandlerDataCopyWithImpl<$Res>
-    extends _$StanzaHandlerDataCopyWithImpl<$Res>
-    implements _$$_StanzaHandlerDataCopyWith<$Res> {
-  __$$_StanzaHandlerDataCopyWithImpl(
-      _$_StanzaHandlerData _value, $Res Function(_$_StanzaHandlerData) _then)
-      : super(_value, (v) => _then(v as _$_StanzaHandlerData));
-
-  @override
-  _$_StanzaHandlerData get _value => super._value as _$_StanzaHandlerData;
-
-  @override
-  $Res call({
-    Object? done = freezed,
-    Object? cancel = freezed,
-    Object? cancelReason = freezed,
-    Object? stanza = freezed,
-    Object? retransmitted = freezed,
-    Object? sims = freezed,
-    Object? sfs = freezed,
-    Object? oob = freezed,
-    Object? stableId = freezed,
-    Object? reply = freezed,
-    Object? chatState = freezed,
-    Object? isCarbon = freezed,
-    Object? deliveryReceiptRequested = freezed,
-    Object? isMarkable = freezed,
-    Object? fun = freezed,
-    Object? funReplacement = freezed,
-    Object? funCancellation = freezed,
-    Object? encrypted = freezed,
-    Object? forceEncryption = freezed,
-    Object? encryptionType = freezed,
-    Object? delayedDelivery = freezed,
-    Object? other = freezed,
-    Object? messageRetraction = freezed,
-    Object? lastMessageCorrectionSid = freezed,
-    Object? messageReactions = freezed,
-    Object? stickerPackId = freezed,
-  }) {
-    return _then(_$_StanzaHandlerData(
-      done == freezed
-          ? _value.done
-          : done // ignore: cast_nullable_to_non_nullable
-              as bool,
-      cancel == freezed
-          ? _value.cancel
-          : cancel // ignore: cast_nullable_to_non_nullable
-              as bool,
-      cancelReason == freezed
-          ? _value.cancelReason
-          : cancelReason // ignore: cast_nullable_to_non_nullable
-              as dynamic,
-      stanza == freezed
-          ? _value.stanza
-          : stanza // ignore: cast_nullable_to_non_nullable
-              as Stanza,
-      retransmitted: retransmitted == freezed
-          ? _value.retransmitted
-          : retransmitted // ignore: cast_nullable_to_non_nullable
-              as bool,
-      sims: sims == freezed
-          ? _value.sims
-          : sims // ignore: cast_nullable_to_non_nullable
-              as StatelessMediaSharingData?,
-      sfs: sfs == freezed
-          ? _value.sfs
-          : sfs // ignore: cast_nullable_to_non_nullable
-              as StatelessFileSharingData?,
-      oob: oob == freezed
-          ? _value.oob
-          : oob // ignore: cast_nullable_to_non_nullable
-              as OOBData?,
-      stableId: stableId == freezed
-          ? _value.stableId
-          : stableId // ignore: cast_nullable_to_non_nullable
-              as StableStanzaId?,
-      reply: reply == freezed
-          ? _value.reply
-          : reply // ignore: cast_nullable_to_non_nullable
-              as ReplyData?,
-      chatState: chatState == freezed
-          ? _value.chatState
-          : chatState // ignore: cast_nullable_to_non_nullable
-              as ChatState?,
-      isCarbon: isCarbon == freezed
-          ? _value.isCarbon
-          : isCarbon // ignore: cast_nullable_to_non_nullable
-              as bool,
-      deliveryReceiptRequested: deliveryReceiptRequested == freezed
-          ? _value.deliveryReceiptRequested
-          : deliveryReceiptRequested // ignore: cast_nullable_to_non_nullable
-              as bool,
-      isMarkable: isMarkable == freezed
-          ? _value.isMarkable
-          : isMarkable // ignore: cast_nullable_to_non_nullable
-              as bool,
-      fun: fun == freezed
-          ? _value.fun
-          : fun // ignore: cast_nullable_to_non_nullable
-              as FileMetadataData?,
-      funReplacement: funReplacement == freezed
-          ? _value.funReplacement
-          : funReplacement // ignore: cast_nullable_to_non_nullable
-              as String?,
-      funCancellation: funCancellation == freezed
-          ? _value.funCancellation
-          : funCancellation // ignore: cast_nullable_to_non_nullable
-              as String?,
-      encrypted: encrypted == freezed
-          ? _value.encrypted
-          : encrypted // ignore: cast_nullable_to_non_nullable
-              as bool,
-      forceEncryption: forceEncryption == freezed
-          ? _value.forceEncryption
-          : forceEncryption // ignore: cast_nullable_to_non_nullable
-              as bool,
-      encryptionType: encryptionType == freezed
-          ? _value.encryptionType
-          : encryptionType // ignore: cast_nullable_to_non_nullable
-              as ExplicitEncryptionType?,
-      delayedDelivery: delayedDelivery == freezed
-          ? _value.delayedDelivery
-          : delayedDelivery // ignore: cast_nullable_to_non_nullable
-              as DelayedDelivery?,
-      other: other == freezed
-          ? _value._other
-          : other // ignore: cast_nullable_to_non_nullable
-              as Map<String, dynamic>,
-      messageRetraction: messageRetraction == freezed
-          ? _value.messageRetraction
-          : messageRetraction // ignore: cast_nullable_to_non_nullable
-              as MessageRetractionData?,
-      lastMessageCorrectionSid: lastMessageCorrectionSid == freezed
-          ? _value.lastMessageCorrectionSid
-          : lastMessageCorrectionSid // ignore: cast_nullable_to_non_nullable
-              as String?,
-      messageReactions: messageReactions == freezed
-          ? _value.messageReactions
-          : messageReactions // ignore: cast_nullable_to_non_nullable
-              as MessageReactions?,
-      stickerPackId: stickerPackId == freezed
-          ? _value.stickerPackId
-          : stickerPackId // ignore: cast_nullable_to_non_nullable
-              as String?,
-    ));
-  }
-}
-
-/// @nodoc
-
-class _$_StanzaHandlerData implements _StanzaHandlerData {
-  _$_StanzaHandlerData(this.done, this.cancel, this.cancelReason, this.stanza,
-      {this.retransmitted = false,
-      this.sims,
-      this.sfs,
-      this.oob,
-      this.stableId,
-      this.reply,
-      this.chatState,
-      this.isCarbon = false,
-      this.deliveryReceiptRequested = false,
-      this.isMarkable = false,
-      this.fun,
-      this.funReplacement,
-      this.funCancellation,
-      this.encrypted = false,
-      this.forceEncryption = false,
-      this.encryptionType,
-      this.delayedDelivery,
-      final Map<String, dynamic> other = const <String, dynamic>{},
-      this.messageRetraction,
-      this.lastMessageCorrectionSid,
-      this.messageReactions,
-      this.stickerPackId})
-      : _other = other;
-
-// Indicates to the runner that processing is now done. This means that all
-// pre-processing is done and no other handlers should be consulted.
-  @override
-  final bool done;
-// Indicates to the runner that processing is to be cancelled and no further handlers
-// should run. The stanza also will not be sent.
-  @override
-  final bool cancel;
-// The reason why we cancelled the processing and sending
-  @override
-  final dynamic cancelReason;
-// The stanza that is being dealt with. SHOULD NOT be overwritten, unless it is absolutely
-// necessary, e.g. with Message Carbons or OMEMO
-  @override
-  final Stanza stanza;
-// Whether the stanza is retransmitted. Only useful in the context of outgoing
-// stanza handlers. MUST NOT be overwritten.
-  @override
-  @JsonKey()
-  final bool retransmitted;
-  @override
-  final StatelessMediaSharingData? sims;
-  @override
-  final StatelessFileSharingData? sfs;
-  @override
-  final OOBData? oob;
-  @override
-  final StableStanzaId? stableId;
-  @override
-  final ReplyData? reply;
-  @override
-  final ChatState? chatState;
-  @override
-  @JsonKey()
-  final bool isCarbon;
-  @override
-  @JsonKey()
-  final bool deliveryReceiptRequested;
-  @override
-  @JsonKey()
-  final bool isMarkable;
-// File Upload Notifications
-// A notification
-  @override
-  final FileMetadataData? fun;
-// The stanza id this replaces
-  @override
-  final String? funReplacement;
-// The stanza id this cancels
-  @override
-  final String? funCancellation;
-// Whether the stanza was received encrypted
-  @override
-  @JsonKey()
-  final bool encrypted;
-// If true, forces the encryption manager to encrypt to the JID, even if it
-// would not normally. In the case of OMEMO: If shouldEncrypt returns false
-// but forceEncryption is true, then the OMEMO manager will try to encrypt
-// to the JID anyway.
-  @override
-  @JsonKey()
-  final bool forceEncryption;
-// The stated type of encryption used, if any was used
-  @override
-  final ExplicitEncryptionType? encryptionType;
-// Delayed Delivery
-  @override
-  final DelayedDelivery? delayedDelivery;
-// This is for stanza handlers that are not part of the XMPP library but still need
-// pass data around.
-  final Map<String, dynamic> _other;
-// This is for stanza handlers that are not part of the XMPP library but still need
-// pass data around.
-  @override
-  @JsonKey()
-  Map<String, dynamic> get other {
-    // ignore: implicit_dynamic_type
-    return EqualUnmodifiableMapView(_other);
-  }
-
-// If non-null, then it indicates the origin Id of the message that should be
-// retracted
-  @override
-  final MessageRetractionData? messageRetraction;
-// If non-null, then the message is a correction for the specified stanza Id
-  @override
-  final String? lastMessageCorrectionSid;
-// Reactions data
-  @override
-  final MessageReactions? messageReactions;
-// The Id of the sticker pack this sticker belongs to
-  @override
-  final String? stickerPackId;
-
-  @override
-  String toString() {
-    return 'StanzaHandlerData(done: $done, cancel: $cancel, cancelReason: $cancelReason, stanza: $stanza, retransmitted: $retransmitted, sims: $sims, sfs: $sfs, oob: $oob, stableId: $stableId, reply: $reply, chatState: $chatState, isCarbon: $isCarbon, deliveryReceiptRequested: $deliveryReceiptRequested, isMarkable: $isMarkable, fun: $fun, funReplacement: $funReplacement, funCancellation: $funCancellation, encrypted: $encrypted, forceEncryption: $forceEncryption, encryptionType: $encryptionType, delayedDelivery: $delayedDelivery, other: $other, messageRetraction: $messageRetraction, lastMessageCorrectionSid: $lastMessageCorrectionSid, messageReactions: $messageReactions, stickerPackId: $stickerPackId)';
-  }
-
-  @override
-  bool operator ==(dynamic other) {
-    return identical(this, other) ||
-        (other.runtimeType == runtimeType &&
-            other is _$_StanzaHandlerData &&
-            const DeepCollectionEquality().equals(other.done, done) &&
-            const DeepCollectionEquality().equals(other.cancel, cancel) &&
-            const DeepCollectionEquality()
-                .equals(other.cancelReason, cancelReason) &&
-            const DeepCollectionEquality().equals(other.stanza, stanza) &&
-            const DeepCollectionEquality()
-                .equals(other.retransmitted, retransmitted) &&
-            const DeepCollectionEquality().equals(other.sims, sims) &&
-            const DeepCollectionEquality().equals(other.sfs, sfs) &&
-            const DeepCollectionEquality().equals(other.oob, oob) &&
-            const DeepCollectionEquality().equals(other.stableId, stableId) &&
-            const DeepCollectionEquality().equals(other.reply, reply) &&
-            const DeepCollectionEquality().equals(other.chatState, chatState) &&
-            const DeepCollectionEquality().equals(other.isCarbon, isCarbon) &&
-            const DeepCollectionEquality().equals(
-                other.deliveryReceiptRequested, deliveryReceiptRequested) &&
-            const DeepCollectionEquality()
-                .equals(other.isMarkable, isMarkable) &&
-            const DeepCollectionEquality().equals(other.fun, fun) &&
-            const DeepCollectionEquality()
-                .equals(other.funReplacement, funReplacement) &&
-            const DeepCollectionEquality()
-                .equals(other.funCancellation, funCancellation) &&
-            const DeepCollectionEquality().equals(other.encrypted, encrypted) &&
-            const DeepCollectionEquality()
-                .equals(other.forceEncryption, forceEncryption) &&
-            const DeepCollectionEquality()
-                .equals(other.encryptionType, encryptionType) &&
-            const DeepCollectionEquality()
-                .equals(other.delayedDelivery, delayedDelivery) &&
-            const DeepCollectionEquality().equals(other._other, this._other) &&
-            const DeepCollectionEquality()
-                .equals(other.messageRetraction, messageRetraction) &&
-            const DeepCollectionEquality().equals(
-                other.lastMessageCorrectionSid, lastMessageCorrectionSid) &&
-            const DeepCollectionEquality()
-                .equals(other.messageReactions, messageReactions) &&
-            const DeepCollectionEquality()
-                .equals(other.stickerPackId, stickerPackId));
-  }
-
-  @override
-  int get hashCode => Object.hashAll([
-        runtimeType,
-        const DeepCollectionEquality().hash(done),
-        const DeepCollectionEquality().hash(cancel),
-        const DeepCollectionEquality().hash(cancelReason),
-        const DeepCollectionEquality().hash(stanza),
-        const DeepCollectionEquality().hash(retransmitted),
-        const DeepCollectionEquality().hash(sims),
-        const DeepCollectionEquality().hash(sfs),
-        const DeepCollectionEquality().hash(oob),
-        const DeepCollectionEquality().hash(stableId),
-        const DeepCollectionEquality().hash(reply),
-        const DeepCollectionEquality().hash(chatState),
-        const DeepCollectionEquality().hash(isCarbon),
-        const DeepCollectionEquality().hash(deliveryReceiptRequested),
-        const DeepCollectionEquality().hash(isMarkable),
-        const DeepCollectionEquality().hash(fun),
-        const DeepCollectionEquality().hash(funReplacement),
-        const DeepCollectionEquality().hash(funCancellation),
-        const DeepCollectionEquality().hash(encrypted),
-        const DeepCollectionEquality().hash(forceEncryption),
-        const DeepCollectionEquality().hash(encryptionType),
-        const DeepCollectionEquality().hash(delayedDelivery),
-        const DeepCollectionEquality().hash(_other),
-        const DeepCollectionEquality().hash(messageRetraction),
-        const DeepCollectionEquality().hash(lastMessageCorrectionSid),
-        const DeepCollectionEquality().hash(messageReactions),
-        const DeepCollectionEquality().hash(stickerPackId)
-      ]);
-
-  @JsonKey(ignore: true)
-  @override
-  _$$_StanzaHandlerDataCopyWith<_$_StanzaHandlerData> get copyWith =>
-      __$$_StanzaHandlerDataCopyWithImpl<_$_StanzaHandlerData>(
-          this, _$identity);
-}
-
-abstract class _StanzaHandlerData implements StanzaHandlerData {
-  factory _StanzaHandlerData(final bool done, final bool cancel,
-      final dynamic cancelReason, final Stanza stanza,
-      {final bool retransmitted,
-      final StatelessMediaSharingData? sims,
-      final StatelessFileSharingData? sfs,
-      final OOBData? oob,
-      final StableStanzaId? stableId,
-      final ReplyData? reply,
-      final ChatState? chatState,
-      final bool isCarbon,
-      final bool deliveryReceiptRequested,
-      final bool isMarkable,
-      final FileMetadataData? fun,
-      final String? funReplacement,
-      final String? funCancellation,
-      final bool encrypted,
-      final bool forceEncryption,
-      final ExplicitEncryptionType? encryptionType,
-      final DelayedDelivery? delayedDelivery,
-      final Map<String, dynamic> other,
-      final MessageRetractionData? messageRetraction,
-      final String? lastMessageCorrectionSid,
-      final MessageReactions? messageReactions,
-      final String? stickerPackId}) = _$_StanzaHandlerData;
-
-  @override // Indicates to the runner that processing is now done. This means that all
-// pre-processing is done and no other handlers should be consulted.
-  bool get done;
-  @override // Indicates to the runner that processing is to be cancelled and no further handlers
-// should run. The stanza also will not be sent.
-  bool get cancel;
-  @override // The reason why we cancelled the processing and sending
-  dynamic get cancelReason;
-  @override // The stanza that is being dealt with. SHOULD NOT be overwritten, unless it is absolutely
-// necessary, e.g. with Message Carbons or OMEMO
-  Stanza get stanza;
-  @override // Whether the stanza is retransmitted. Only useful in the context of outgoing
-// stanza handlers. MUST NOT be overwritten.
-  bool get retransmitted;
-  @override
-  StatelessMediaSharingData? get sims;
-  @override
-  StatelessFileSharingData? get sfs;
-  @override
-  OOBData? get oob;
-  @override
-  StableStanzaId? get stableId;
-  @override
-  ReplyData? get reply;
-  @override
-  ChatState? get chatState;
-  @override
-  bool get isCarbon;
-  @override
-  bool get deliveryReceiptRequested;
-  @override
-  bool get isMarkable;
-  @override // File Upload Notifications
-// A notification
-  FileMetadataData? get fun;
-  @override // The stanza id this replaces
-  String? get funReplacement;
-  @override // The stanza id this cancels
-  String? get funCancellation;
-  @override // Whether the stanza was received encrypted
-  bool get encrypted;
-  @override // If true, forces the encryption manager to encrypt to the JID, even if it
-// would not normally. In the case of OMEMO: If shouldEncrypt returns false
-// but forceEncryption is true, then the OMEMO manager will try to encrypt
-// to the JID anyway.
-  bool get forceEncryption;
-  @override // The stated type of encryption used, if any was used
-  ExplicitEncryptionType? get encryptionType;
-  @override // Delayed Delivery
-  DelayedDelivery? get delayedDelivery;
-  @override // This is for stanza handlers that are not part of the XMPP library but still need
-// pass data around.
-  Map<String, dynamic> get other;
-  @override // If non-null, then it indicates the origin Id of the message that should be
-// retracted
-  MessageRetractionData? get messageRetraction;
-  @override // If non-null, then the message is a correction for the specified stanza Id
-  String? get lastMessageCorrectionSid;
-  @override // Reactions data
-  MessageReactions? get messageReactions;
-  @override // The Id of the sticker pack this sticker belongs to
-  String? get stickerPackId;
-  @override
-  @JsonKey(ignore: true)
-  _$$_StanzaHandlerDataCopyWith<_$_StanzaHandlerData> get copyWith =>
-      throw _privateConstructorUsedError;
-}

packages/moxxmpp/lib/src/managers/handlers.dart

@@ -1,4 +1,4 @@
-import 'package:moxlib/moxlib.dart';
+import 'package:collection/collection.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
@@ -100,10 +100,10 @@ class StanzaHandler extends Handler {
         matches &= firstTag?.xmlns == tagXmlns;
       }
     } else if (tagXmlns != null) {
-      matches &= listContains(
-        node.children,
-        (XMLNode node_) => node_.attributes['xmlns'] == tagXmlns,
-      );
+      matches &= node.children.firstWhereOrNull(
+            (XMLNode node_) => node_.attributes['xmlns'] == tagXmlns,
+          ) !=
+          null;
     }
 
     return matches;

packages/moxxmpp/lib/src/managers/namespaces.dart

@@ -31,3 +31,6 @@ const lastMessageCorrectionManager = 'org.moxxmpp.lastmessagecorrectionmanager';
 const messageReactionsManager = 'org.moxxmpp.messagereactionsmanager';
 const stickersManager = 'org.moxxmpp.stickersmanager';
 const entityCapabilitiesManager = 'org.moxxmpp.entitycapabilities';
+const messageProcessingHintManager = 'org.moxxmpp.messageprocessinghint';
+const occupantIdManager = 'org.moxxmpp.occupantidmanager';
+const mucManager = 'org.moxxmpp.mucmanager';

packages/moxxmpp/lib/src/message.dart

@@ -1,325 +1,153 @@
-import 'package:moxlib/moxlib.dart';
+import 'package:collection/collection.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
-import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/xeps/staging/file_upload_notification.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 import 'package:moxxmpp/src/xeps/xep_0066.dart';
-import 'package:moxxmpp/src/xeps/xep_0085.dart';
-import 'package:moxxmpp/src/xeps/xep_0184.dart';
-import 'package:moxxmpp/src/xeps/xep_0308.dart';
-import 'package:moxxmpp/src/xeps/xep_0333.dart';
-import 'package:moxxmpp/src/xeps/xep_0334.dart';
-import 'package:moxxmpp/src/xeps/xep_0359.dart';
-import 'package:moxxmpp/src/xeps/xep_0424.dart';
-import 'package:moxxmpp/src/xeps/xep_0444.dart';
-import 'package:moxxmpp/src/xeps/xep_0446.dart';
 import 'package:moxxmpp/src/xeps/xep_0447.dart';
-import 'package:moxxmpp/src/xeps/xep_0448.dart';
+import 'package:moxxmpp/src/xeps/xep_0449.dart';
 import 'package:moxxmpp/src/xeps/xep_0461.dart';
 
-/// Data used to build a message stanza.
-///
-/// [setOOBFallbackBody] indicates, when using SFS, whether a OOB fallback should be
-/// added. This is recommended when sharing files but may cause issues when the message
-/// stanza should include a SFS element without any fallbacks.
-class MessageDetails {
-  const MessageDetails({
-    required this.to,
-    this.body,
-    this.requestDeliveryReceipt = false,
-    this.requestChatMarkers = true,
-    this.id,
-    this.originId,
-    this.quoteBody,
-    this.quoteId,
-    this.quoteFrom,
-    this.chatState,
-    this.sfs,
-    this.fun,
-    this.funReplacement,
-    this.funCancellation,
-    this.shouldEncrypt = false,
-    this.messageRetraction,
-    this.lastMessageCorrectionId,
-    this.messageReactions,
-    this.messageProcessingHints,
-    this.stickerPackId,
-    this.setOOBFallbackBody = true,
-  });
-  final String to;
+/// A callback that is called whenever a message is sent using
+/// [MessageManager.sendMessage]. The input the typed map that is passed to
+/// sendMessage.
+typedef MessageSendingCallback = List<XMLNode> Function(
+  TypedMap<StanzaHandlerExtension>,
+);
+
+/// The raw content of the <body /> element.
+class MessageBodyData implements StanzaHandlerExtension {
+  const MessageBodyData(this.body);
+
+  /// The content of the <body /> element.
   final String? body;
-  final bool requestDeliveryReceipt;
-  final bool requestChatMarkers;
-  final String? id;
-  final String? originId;
-  final String? quoteBody;
-  final String? quoteId;
-  final String? quoteFrom;
-  final ChatState? chatState;
-  final StatelessFileSharingData? sfs;
-  final FileMetadataData? fun;
-  final String? funReplacement;
-  final String? funCancellation;
-  final bool shouldEncrypt;
-  final MessageRetractionData? messageRetraction;
-  final String? lastMessageCorrectionId;
-  final MessageReactions? messageReactions;
-  final String? stickerPackId;
-  final List<MessageProcessingHint>? messageProcessingHints;
-  final bool setOOBFallbackBody;
+
+  XMLNode toXML() {
+    return XMLNode(
+      tag: 'body',
+      text: body,
+    );
+  }
+}
+
+/// The id attribute of the message stanza.
+class MessageIdData implements StanzaHandlerExtension {
+  const MessageIdData(this.id);
+
+  /// The id attribute of the stanza.
+  final String id;
 }
 
 class MessageManager extends XmppManagerBase {
   MessageManager() : super(messageManager);
 
+  /// The priority of the message handler. If a handler should run before this one,
+  /// which emits the [MessageEvent] event and terminates processing, make sure it
+  /// has a priority greater than [messageHandlerPriority].
+  static int messageHandlerPriority = -100;
+
+  /// A list of callbacks that are called when a message is sent in order to add
+  /// appropriate child elements.
+  final List<MessageSendingCallback> _messageSendingCallbacks =
+      List<MessageSendingCallback>.empty(growable: true);
+
+  void registerMessageSendingCallback(MessageSendingCallback callback) {
+    _messageSendingCallbacks.add(callback);
+  }
+
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
         StanzaHandler(
           stanzaTag: 'message',
           callback: _onMessage,
-          priority: -100,
-        )
+          priority: messageHandlerPriority,
+        ),
       ];
 
   @override
   Future<bool> isSupported() async => true;
 
   Future<StanzaHandlerData> _onMessage(
-    Stanza _,
+    Stanza stanza,
     StanzaHandlerData state,
   ) async {
-    final message = state.stanza;
-    final body = message.firstTag('body');
-
-    final hints = List<MessageProcessingHint>.empty(growable: true);
-    for (final element
-        in message.findTagsByXmlns(messageProcessingHintsXmlns)) {
-      hints.add(messageProcessingHintFromXml(element));
+    final body = stanza.firstTag('body');
+    if (body != null) {
+      state.extensions.set(
+        MessageBodyData(body.innerText()),
+      );
     }
 
     getAttributes().sendEvent(
       MessageEvent(
-        body: body != null ? body.innerText() : '',
-        fromJid: JID.fromString(message.attributes['from']! as String),
-        toJid: JID.fromString(message.attributes['to']! as String),
-        sid: message.attributes['id']! as String,
-        stanzaId: state.stableId ?? const StableStanzaId(),
-        isCarbon: state.isCarbon,
-        deliveryReceiptRequested: state.deliveryReceiptRequested,
-        isMarkable: state.isMarkable,
-        type: message.attributes['type'] as String?,
-        oob: state.oob,
-        sfs: state.sfs,
-        sims: state.sims,
-        reply: state.reply,
-        chatState: state.chatState,
-        fun: state.fun,
-        funReplacement: state.funReplacement,
-        funCancellation: state.funCancellation,
-        encrypted: state.encrypted,
-        messageRetraction: state.messageRetraction,
-        messageCorrectionId: state.lastMessageCorrectionSid,
-        messageReactions: state.messageReactions,
-        messageProcessingHints: hints.isEmpty ? null : hints,
-        stickerPackId: state.stickerPackId,
-        other: state.other,
-        error: StanzaError.fromStanza(message),
+        JID.fromString(state.stanza.attributes['from']! as String),
+        JID.fromString(state.stanza.attributes['to']! as String),
+        state.encrypted,
+        state.extensions,
+        id: state.stanza.attributes['id'] as String?,
+        type: state.stanza.attributes['type'] as String?,
+        error: StanzaError.fromStanza(state.stanza),
+        encryptionError: state.encryptionError,
       ),
     );
 
-    return state.copyWith(done: true);
+    return state..done = true;
   }
 
-  /// Send a message to to with the content body. If deliveryRequest is true, then
-  /// the message will also request a delivery receipt from the receiver.
-  /// If id is non-null, then it will be the id of the message stanza.
-  /// element to this id. If originId is non-null, then it will create an "origin-id"
-  /// child in the message stanza and set its id to originId.
-  void sendMessage(MessageDetails details) {
-    assert(
-      implies(
-        details.quoteBody != null,
-        details.quoteFrom != null && details.quoteId != null,
+  /// Send an unawaitable message to [to]. [extensions] is a typed map that contains
+  /// data for building the message.
+  Future<void> sendMessage(
+    JID to,
+    TypedMap<StanzaHandlerExtension> extensions, {
+    String type = 'chat',
+  }) async {
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.message(
+          to: to.toString(),
+          id: extensions.get<MessageIdData>()?.id,
+          type: type,
+          children: _messageSendingCallbacks
+              .map((c) => c(extensions))
+              .flattened
+              .toList(),
+        ),
+        extensions: extensions,
+        awaitable: false,
       ),
-      'When quoting a message, then quoteFrom and quoteId must also be non-null',
     );
+  }
 
-    final stanza = Stanza.message(
-      to: details.to,
-      type: 'chat',
-      id: details.id,
-      children: [],
-    );
-
-    if (details.quoteBody != null) {
-      final quote = QuoteData.fromBodies(details.quoteBody!, details.body!);
-
-      stanza
-        ..addChild(
-          XMLNode(tag: 'body', text: quote.body),
-        )
-        ..addChild(
-          XMLNode.xmlns(
-            tag: 'reply',
-            xmlns: replyXmlns,
-            attributes: {'to': details.quoteFrom!, 'id': details.quoteId!},
-          ),
-        )
-        ..addChild(
-          XMLNode.xmlns(
-            tag: 'fallback',
-            xmlns: fallbackXmlns,
-            attributes: {'for': replyXmlns},
-            children: [
-              XMLNode(
-                tag: 'body',
-                attributes: <String, String>{
-                  'start': '0',
-                  'end': '${quote.fallbackLength}',
-                },
-              )
-            ],
-          ),
-        );
-    } else {
-      var body = details.body;
-      if (details.sfs != null && details.setOOBFallbackBody) {
-        // TODO(Unknown): Maybe find a better solution
-        final firstSource = details.sfs!.sources.first;
-        if (firstSource is StatelessFileSharingUrlSource) {
-          body = firstSource.url;
-        } else if (firstSource is StatelessFileSharingEncryptedSource) {
-          body = firstSource.source.url;
-        }
-      } else if (details.messageRetraction?.fallback != null) {
-        body = details.messageRetraction!.fallback;
-      }
-
-      if (body != null) {
-        stanza.addChild(
-          XMLNode(tag: 'body', text: body),
-        );
-      }
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    if (extensions.get<ReplyData>() != null) {
+      return [];
+    }
+    if (extensions.get<StickersData>() != null) {
+      return [];
+    }
+    if (extensions.get<StatelessFileSharingData>() != null) {
+      return [];
+    }
+    if (extensions.get<OOBData>() != null) {
+      return [];
     }
 
-    if (details.requestDeliveryReceipt) {
-      stanza.addChild(makeMessageDeliveryRequest());
-    }
-    if (details.requestChatMarkers) {
-      stanza.addChild(makeChatMarkerMarkable());
-    }
-    if (details.originId != null) {
-      stanza.addChild(makeOriginIdElement(details.originId!));
-    }
+    final data = extensions.get<MessageBodyData>();
+    return data != null ? [data.toXML()] : [];
+  }
 
-    if (details.sfs != null) {
-      stanza.addChild(details.sfs!.toXML());
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
 
-      final source = details.sfs!.sources.first;
-      if (source is StatelessFileSharingUrlSource &&
-          details.setOOBFallbackBody) {
-        // SFS recommends OOB as a fallback
-        stanza.addChild(constructOOBNode(OOBData(url: source.url)));
-      }
-    }
-
-    if (details.chatState != null) {
-      stanza.addChild(
-        // TODO(Unknown): Move this into xep_0085.dart
-        XMLNode.xmlns(
-          tag: chatStateToString(details.chatState!),
-          xmlns: chatStateXmlns,
-        ),
-      );
-    }
-
-    if (details.fun != null) {
-      stanza.addChild(
-        XMLNode.xmlns(
-          tag: 'file-upload',
-          xmlns: fileUploadNotificationXmlns,
-          children: [
-            details.fun!.toXML(),
-          ],
-        ),
-      );
-    }
-
-    if (details.funReplacement != null) {
-      stanza.addChild(
-        XMLNode.xmlns(
-          tag: 'replaces',
-          xmlns: fileUploadNotificationXmlns,
-          attributes: <String, String>{
-            'id': details.funReplacement!,
-          },
-        ),
-      );
-    }
-
-    if (details.messageRetraction != null) {
-      stanza.addChild(
-        XMLNode.xmlns(
-          tag: 'apply-to',
-          xmlns: fasteningXmlns,
-          attributes: <String, String>{
-            'id': details.messageRetraction!.id,
-          },
-          children: [
-            XMLNode.xmlns(
-              tag: 'retract',
-              xmlns: messageRetractionXmlns,
-            ),
-          ],
-        ),
-      );
-
-      if (details.messageRetraction!.fallback != null) {
-        stanza.addChild(
-          XMLNode.xmlns(
-            tag: 'fallback',
-            xmlns: fallbackIndicationXmlns,
-          ),
-        );
-      }
-    }
-
-    if (details.lastMessageCorrectionId != null) {
-      stanza.addChild(
-        makeLastMessageCorrectionEdit(
-          details.lastMessageCorrectionId!,
-        ),
-      );
-    }
-
-    if (details.messageReactions != null) {
-      stanza.addChild(details.messageReactions!.toXml());
-    }
-
-    if (details.messageProcessingHints != null) {
-      for (final hint in details.messageProcessingHints!) {
-        stanza.addChild(hint.toXml());
-      }
-    }
-
-    if (details.stickerPackId != null) {
-      stanza.addChild(
-        XMLNode.xmlns(
-          tag: 'sticker',
-          xmlns: stickersXmlns,
-          attributes: {
-            'pack': details.stickerPackId!,
-          },
-        ),
-      );
-    }
-
-    getAttributes().sendStanza(stanza, awaitable: false);
+    // Register the sending callback
+    registerMessageSendingCallback(_messageSendingCallback);
   }
 }

packages/moxxmpp/lib/src/namespaces.dart

@@ -9,9 +9,11 @@ const fullStanzaXmlns = 'urn:ietf:params:xml:ns:xmpp-stanzas';
 // RFC 6121
 const rosterXmlns = 'jabber:iq:roster';
 const rosterVersioningXmlns = 'urn:xmpp:features:rosterver';
+const subscriptionPreApprovalXmlns = 'urn:xmpp:features:pre-approval';
 
 // XEP-0004
 const dataFormsXmlns = 'jabber:x:data';
+const formVarFormType = 'FORM_TYPE';
 
 // XEP-0030
 const discoInfoXmlns = 'http://jabber.org/protocol/disco#info';
@@ -20,6 +22,11 @@ const discoItemsXmlns = 'http://jabber.org/protocol/disco#items';
 // XEP-0033
 const extendedAddressingXmlns = 'http://jabber.org/protocol/address';
 
+// XEP-0045
+const mucXmlns = 'http://jabber.org/protocol/muc';
+const mucUserXmlns = 'http://jabber.org/protocol/muc#user';
+const roomInfoFormType = 'http://jabber.org/protocol/muc#roominfo';
+
 // XEP-0054
 const vCardTempXmlns = 'vcard-temp';
 const vCardTempUpdate = 'vcard-temp:x:update';
@@ -65,6 +72,9 @@ const delayedDeliveryXmlns = 'urn:xmpp:delay';
 // XEP-0234
 const jingleFileTransferXmlns = 'urn:xmpp:jingle:apps:file-transfer:5';
 
+// XEP-0264
+const jingleContentThumbnailXmlns = 'urn:xmpp:thumbs:1';
+
 // XEP-0280
 const carbonsXmlns = 'urn:xmpp:carbons:2';
 
@@ -96,7 +106,7 @@ const httpFileUploadXmlns = 'urn:xmpp:http:upload:0';
 // XEP-0372
 const referenceXmlns = 'urn:xmpp:reference:0';
 
-// XEP-380
+// XEP-0380
 const emeXmlns = 'urn:xmpp:eme:0';
 const emeOtr = 'urn:xmpp:otr:0';
 const emeLegacyOpenPGP = 'jabber:x:encrypted';
@@ -122,6 +132,9 @@ const sasl2Xmlns = 'urn:xmpp:sasl:2';
 // XEP-0420
 const sceXmlns = 'urn:xmpp:sce:1';
 
+// XEP-0421
+const occupantIdXmlns = 'urn:xmpp:occupant-id:0';
+
 // XEP-0422
 const fasteningXmlns = 'urn:xmpp:fasten:0';
 
@@ -153,7 +166,6 @@ const stickersXmlns = 'urn:xmpp:stickers:0';
 
 // XEP-0461
 const replyXmlns = 'urn:xmpp:reply:0';
-const fallbackXmlns = 'urn:xmpp:feature-fallback:0';
 
 // ???
 const urlDataXmlns = 'http://jabber.org/protocol/url-data';

packages/moxxmpp/lib/src/negotiators/manager.dart

@@ -1 +0,0 @@
-

packages/moxxmpp/lib/src/negotiators/namespaces.dart

@@ -11,3 +11,4 @@ const sasl2Negotiator = 'org.moxxmpp.sasl.sasl2';
 const bind2Negotiator = 'org.moxxmpp.bind2';
 const saslFASTNegotiator = 'org.moxxmpp.sasl.fast';
 const carbonsNegotiator = 'org.moxxmpp.bind2.carbons';
+const presenceNegotiator = 'org.moxxmpp.core.presence';

packages/moxxmpp/lib/src/negotiators/negotiator.dart

@@ -1,3 +1,4 @@
+import 'package:collection/collection.dart';
 import 'package:meta/meta.dart';
 import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/connection.dart';
@@ -8,7 +9,6 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/settings.dart';
 import 'package:moxxmpp/src/socket.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 
 /// The state a negotiator is currently in
 enum NegotiatorState {
@@ -117,8 +117,7 @@ abstract class XmppFeatureNegotiatorBase {
   /// Returns true if a feature in [features], which are the children of the
   /// <stream:features /> nonza, can be negotiated. Otherwise, returns false.
   bool matchesFeature(List<XMLNode> features) {
-    return firstWhereOrNull(
-          features,
+    return features.firstWhereOrNull(
           (XMLNode feature) => feature.attributes['xmlns'] == negotiatingXmlns,
         ) !=
         null;

packages/moxxmpp/lib/src/parser.dart

@@ -57,9 +57,10 @@ class _ChunkedConversionBuffer<S, T> {
 }
 
 /// A buffer to put between a socket's input and a full XML stream.
-class XMPPStreamParser extends StreamTransformerBase<String, XMPPStreamObject> {
-  final StreamController<XMPPStreamObject> _streamController =
-      StreamController<XMPPStreamObject>();
+class XMPPStreamParser
+    extends StreamTransformerBase<String, List<XMPPStreamObject>> {
+  final StreamController<List<XMPPStreamObject>> _streamController =
+      StreamController<List<XMPPStreamObject>>();
 
   /// Turns a String into a list of [XmlEvent]s in a chunked fashion.
   _ChunkedConversionBuffer<String, XmlEvent> _eventBuffer =
@@ -117,13 +118,14 @@ class XMPPStreamParser extends StreamTransformerBase<String, XMPPStreamObject> {
   }
 
   @override
-  Stream<XMPPStreamObject> bind(Stream<String> stream) {
+  Stream<List<XMPPStreamObject>> bind(Stream<String> stream) {
     // We do not want to use xml's toXmlEvents and toSubtreeEvents methods as they
     // create streams we cannot close. We need to be able to destroy and recreate an
     // XML parser whenever we start a new connection.
     stream.listen((input) {
       final events = _eventBuffer.convert(input);
       final streamHeaderEvents = _streamHeaderSelector.convert(events);
+      final objects = List<XMPPStreamObject>.empty(growable: true);
 
       // Process the stream header separately.
       for (final event in streamHeaderEvents) {
@@ -135,7 +137,7 @@ class XMPPStreamParser extends StreamTransformerBase<String, XMPPStreamObject> {
           continue;
         }
 
-        _streamController.add(
+        objects.add(
           XMPPStreamHeader(
             Map<String, String>.fromEntries(
               event.attributes.map((attr) {
@@ -151,13 +153,15 @@ class XMPPStreamParser extends StreamTransformerBase<String, XMPPStreamObject> {
       final children = _childBuffer.convert(childEvents);
       for (final node in children) {
         if (node.nodeType == XmlNodeType.ELEMENT) {
-          _streamController.add(
+          objects.add(
             XMPPStreamElement(
               XMLNode.fromXmlElement(node as XmlElement),
             ),
           );
         }
       }
+
+      _streamController.add(objects);
     });
 
     return _streamController.stream;

packages/moxxmpp/lib/src/presence.dart

@@ -1,5 +1,5 @@
 import 'dart:async';
-import 'package:moxxmpp/src/connection.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
@@ -8,15 +8,44 @@ import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
+import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/xeps/xep_0198/negotiator.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
+import 'package:moxxmpp/src/xeps/xep_0198/types.dart';
 
 /// A function that will be called when presence, outside of subscription request
 /// management, will be sent. Useful for managers that want to add [XMLNode]s to said
 /// presence.
 typedef PresencePreSendCallback = Future<List<XMLNode>> Function();
 
+/// A pseudo-negotiator that does not really negotiate anything. Instead, its purpose
+/// is to look for a stream feature indicating that we can pre-approve subscription
+/// requests, shown by [PresenceNegotiator.preApprovalSupported].
+class PresenceNegotiator extends XmppFeatureNegotiatorBase {
+  PresenceNegotiator()
+      : super(11, false, subscriptionPreApprovalXmlns, presenceNegotiator);
+
+  /// Flag indicating whether presence subscription pre-approval is supported
+  bool _supported = false;
+  bool get preApprovalSupported => _supported;
+
+  @override
+  Future<Result<NegotiatorState, NegotiatorError>> negotiate(
+    XMLNode nonza,
+  ) async {
+    _supported = true;
+    return const Result(NegotiatorState.done);
+  }
+
+  @override
+  void reset() {
+    _supported = false;
+
+    super.reset();
+  }
+}
+
 /// A mandatory manager that handles initial presence sending, sending of subscription
 /// request management requests and triggers events for incoming presence stanzas.
 class PresenceManager extends XmppManagerBase {
@@ -26,12 +55,18 @@ class PresenceManager extends XmppManagerBase {
   final List<PresencePreSendCallback> _presenceCallbacks =
       List.empty(growable: true);
 
+  /// The priority of the presence handler. If a handler should run before this one,
+  /// which terminates processing, make sure the handler has a priority greater than
+  /// [presenceHandlerPriority].
+  static int presenceHandlerPriority = -100;
+
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
         StanzaHandler(
           stanzaTag: 'presence',
           callback: _onPresence,
-        )
+          priority: presenceHandlerPriority,
+        ),
       ];
 
   @override
@@ -49,12 +84,8 @@ class PresenceManager extends XmppManagerBase {
   Future<void> onXmppEvent(XmppEvent event) async {
     if (event is StreamNegotiationsDoneEvent) {
       // Send initial presence only when we have not resumed the stream
-      final sm = getAttributes().getNegotiatorById<StreamManagementNegotiator>(
-        streamManagementNegotiator,
-      );
-      final isResumed = sm?.isResumed ?? false;
-      if (!isResumed) {
-        unawaited(sendInitialPresence());
+      if (!event.resumed) {
+        await sendInitialPresence();
       }
     }
   }
@@ -73,7 +104,7 @@ class PresenceManager extends XmppManagerBase {
               from: JID.fromString(presence.from!),
             ),
           );
-          return state.copyWith(done: true);
+          return state..done = true;
         }
       default:
         break;
@@ -82,10 +113,7 @@ class PresenceManager extends XmppManagerBase {
     if (presence.from != null) {
       logger.finest("Received presence from '${presence.from}'");
 
-      getAttributes().sendEvent(
-        PresenceReceivedEvent(JID.fromString(presence.from!), presence),
-      );
-      return state.copyWith(done: true);
+      return state..done = true;
     }
 
     return state;
@@ -108,66 +136,111 @@ class PresenceManager extends XmppManagerBase {
 
     final attrs = getAttributes();
     await attrs.sendStanza(
-      Stanza.presence(
-        from: attrs.getFullJID().toString(),
-        children: children,
+      StanzaDetails(
+        Stanza.presence(
+          children: children,
+        ),
+        awaitable: false,
+        addId: false,
       ),
-      awaitable: false,
-      addId: false,
     );
   }
 
   /// Send an unavailable presence with no 'to' attribute.
-  void sendUnavailablePresence() {
-    getAttributes().sendStanza(
-      Stanza.presence(
-        type: 'unavailable',
+  Future<void> sendUnavailablePresence() async {
+    // Bypass the queue so that this get's sent immediately.
+    // If we do it like this, we can also block the disconnection
+    // until we're actually ready.
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.presence(
+          type: 'unavailable',
+        ),
+        awaitable: false,
+        bypassQueue: true,
+        postSendExtensions: TypedMap<StanzaHandlerExtension>.fromList([
+          const StreamManagementData(true, null),
+        ]),
       ),
-      addFrom: StanzaFromType.full,
     );
   }
 
-  /// Sends a subscription request to [to].
-  void sendSubscriptionRequest(String to) {
-    getAttributes().sendStanza(
-      Stanza.presence(
-        type: 'subscribe',
-        to: to,
+  /// Similar to [requestSubscription], but it also tells the server to automatically
+  /// accept a subscription request from [to], should it arrive.
+  /// This requires a [PresenceNegotiator] to be registered as this feature is optional.
+  ///
+  /// Returns true, when the stanza was sent. Returns false, when the stanza was not sent,
+  /// for example because the server does not support subscription pre-approvals.
+  Future<bool> preApproveSubscription(JID to) async {
+    final negotiator = getAttributes()
+        .getNegotiatorById<PresenceNegotiator>(presenceNegotiator);
+    assert(negotiator != null, 'No PresenceNegotiator registered');
+
+    if (!negotiator!.preApprovalSupported) {
+      return false;
+    }
+
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.presence(
+          type: 'subscribed',
+          to: to.toString(),
+        ),
+        awaitable: false,
+      ),
+    );
+    return true;
+  }
+
+  /// Sends a subscription request to [to].
+  Future<void> requestSubscription(JID to) async {
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.presence(
+          type: 'subscribe',
+          to: to.toString(),
+        ),
+        awaitable: false,
+      ),
+    );
+  }
+
+  /// Accept a subscription request from [to].
+  Future<void> acceptSubscriptionRequest(JID to) async {
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.presence(
+          type: 'subscribed',
+          to: to.toString(),
+        ),
+        awaitable: false,
+      ),
+    );
+  }
+
+  /// Send a subscription request rejection to [to].
+  Future<void> rejectSubscriptionRequest(JID to) async {
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.presence(
+          type: 'unsubscribed',
+          to: to.toString(),
+        ),
+        awaitable: false,
       ),
-      addFrom: StanzaFromType.none,
     );
   }
 
   /// Sends an unsubscription request to [to].
-  void sendUnsubscriptionRequest(String to) {
-    getAttributes().sendStanza(
-      Stanza.presence(
-        type: 'unsubscribe',
-        to: to,
+  Future<void> unsubscribe(JID to) async {
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.presence(
+          type: 'unsubscribe',
+          to: to.toString(),
+        ),
+        awaitable: false,
       ),
-      addFrom: StanzaFromType.none,
-    );
-  }
-
-  /// Accept a presence subscription request for [to].
-  void sendSubscriptionRequestApproval(String to) {
-    getAttributes().sendStanza(
-      Stanza.presence(
-        type: 'subscribed',
-        to: to,
-      ),
-      addFrom: StanzaFromType.none,
-    );
-  }
-
-  /// Reject a presence subscription request for [to].
-  void sendSubscriptionRequestRejection(String to) {
-    getAttributes().sendStanza(
-      Stanza.presence(
-        type: 'unsubscribed',
-        to: to,
-      ),
-      addFrom: StanzaFromType.none,
     );
   }
 }

packages/moxxmpp/lib/src/rfcs/rfc_6120/resource_binding.dart

@@ -1,10 +1,10 @@
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/xep_0198.dart';
 import 'package:uuid/uuid.dart';
 

packages/moxxmpp/lib/src/rfcs/rfc_6120/sasl/negotiator.dart

@@ -1,4 +1,4 @@
-import 'package:moxlib/moxlib.dart';
+import 'package:collection/collection.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/stringxml.dart';
@@ -13,15 +13,13 @@ abstract class SaslNegotiator extends XmppFeatureNegotiatorBase {
   @override
   bool matchesFeature(List<XMLNode> features) {
     // Is SASL advertised?
-    final mechanisms = firstWhereOrNull(
-      features,
+    final mechanisms = features.firstWhereOrNull(
       (XMLNode feature) => feature.attributes['xmlns'] == saslXmlns,
     );
     if (mechanisms == null) return false;
 
     // Is SASL PLAIN advertised?
-    return firstWhereOrNull(
-          mechanisms.children,
+    return mechanisms.children.firstWhereOrNull(
           (XMLNode mechanism) => mechanism.text == mechanismName,
         ) !=
         null;

packages/moxxmpp/lib/src/rfcs/rfc_6120/sasl/plain.dart

@@ -1,12 +1,12 @@
 import 'dart:convert';
 import 'package:logging/logging.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/rfcs/rfc_6120/sasl/errors.dart';
 import 'package:moxxmpp/src/rfcs/rfc_6120/sasl/nonza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0388/negotiators.dart';
 import 'package:moxxmpp/src/xeps/xep_0388/xep_0388.dart';
 import 'package:saslprep/saslprep.dart';
@@ -96,7 +96,9 @@ class SaslPlainNegotiator extends Sasl2AuthenticationNegotiator {
 
   @override
   Future<Result<bool, NegotiatorError>> onSasl2Success(XMLNode response) async {
-    state = NegotiatorState.done;
+    if (pickedForSasl2) {
+      state = NegotiatorState.done;
+    }
     return const Result(true);
   }
 

packages/moxxmpp/lib/src/rfcs/rfc_6120/sasl/scram.dart

@@ -2,6 +2,7 @@ import 'dart:convert';
 import 'dart:math' show Random;
 import 'package:cryptography/cryptography.dart';
 import 'package:logging/logging.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
@@ -10,7 +11,6 @@ import 'package:moxxmpp/src/rfcs/rfc_6120/sasl/errors.dart';
 import 'package:moxxmpp/src/rfcs/rfc_6120/sasl/kv.dart';
 import 'package:moxxmpp/src/rfcs/rfc_6120/sasl/nonza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0388/negotiators.dart';
 import 'package:moxxmpp/src/xeps/xep_0388/xep_0388.dart';
 import 'package:random_string/random_string.dart';
@@ -246,6 +246,9 @@ class SaslScramNegotiator extends Sasl2AuthenticationNegotiator {
   bool _checkSignature(String base64Signature) {
     final signature =
         parseKeyValue(utf8.decode(base64.decode(base64Signature)));
+    _log.finest(
+      'Expecting signature: "$_serverSignature", got: "${signature["v"]}"',
+    );
     return signature['v']! == _serverSignature;
   }
 
@@ -360,6 +363,11 @@ class SaslScramNegotiator extends Sasl2AuthenticationNegotiator {
 
   @override
   Future<Result<bool, NegotiatorError>> onSasl2Success(XMLNode response) async {
+    // Don't do anything if we have not been picked for SASL2.
+    if (!pickedForSasl2) {
+      return const Result(true);
+    }
+
     // When we're done with SASL2, check the additional data to verify the server
     // signature.
     state = NegotiatorState.done;

packages/moxxmpp/lib/src/rfcs/rfc_6120/starttls.dart

@@ -1,9 +1,9 @@
 import 'package:logging/logging.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 
 enum _StartTlsState { ready, requested }
 

packages/moxxmpp/lib/src/roster/roster.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'package:collection/collection.dart';
 import 'package:meta/meta.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/attributes.dart';
 import 'package:moxxmpp/src/managers/base.dart';
@@ -14,7 +15,6 @@ import 'package:moxxmpp/src/roster/errors.dart';
 import 'package:moxxmpp/src/roster/state.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 
 @immutable
 class XmppRosterItem {
@@ -122,7 +122,7 @@ class RosterManager extends XmppManagerBase {
           tagName: 'query',
           tagXmlns: rosterXmlns,
           callback: _onRosterPush,
-        )
+        ),
       ];
 
   @override
@@ -145,7 +145,7 @@ class RosterManager extends XmppManagerBase {
       logger.warning(
         'Roster push invalid! Unexpected from attribute: ${stanza.toXml()}',
       );
-      return state.copyWith(done: true);
+      return state..done = true;
     }
 
     final query = stanza.firstTag('query', xmlns: rosterXmlns)!;
@@ -154,7 +154,7 @@ class RosterManager extends XmppManagerBase {
 
     if (item == null) {
       logger.warning('Received empty roster push');
-      return state.copyWith(done: true);
+      return state..done = true;
     }
 
     unawaited(
@@ -177,13 +177,23 @@ class RosterManager extends XmppManagerBase {
       [],
     );
 
-    return state.copyWith(done: true);
+    return state..done = true;
   }
 
   /// Shared code between requesting rosters without and with roster versioning, if
   /// the server deems a regular roster response more efficient than n roster pushes.
+  ///
+  /// [query] is the <query /> child of the iq, if available.
+  ///
+  /// If roster versioning was used, then [requestedRosterVersion] is the version
+  /// we requested the roster with.
+  ///
+  /// Note that if roster versioning is used and the server returns us an empty iq,
+  /// it means that the roster did not change since the last version. In that case,
+  /// we do nothing and just return. The roster state manager will not be notified.
   Future<Result<RosterRequestResult, RosterError>> _handleRosterResponse(
     XMLNode? query,
+    String? requestedRosterVersion,
   ) async {
     final List<XmppRosterItem> items;
     String? rosterVersion;
@@ -204,6 +214,14 @@ class RosterManager extends XmppManagerBase {
           .toList();
 
       rosterVersion = query.attributes['ver'] as String?;
+    } else if (requestedRosterVersion != null) {
+      // Skip the handleRosterFetch call since nothing changed.
+      return Result(
+        RosterRequestResult(
+          [],
+          requestedRosterVersion,
+        ),
+      );
     } else {
       logger.warning(
         'Server response to roster request without roster versioning does not contain a <query /> element, while the type is not error. This violates RFC6121',
@@ -223,26 +241,34 @@ class RosterManager extends XmppManagerBase {
     return Result(result);
   }
 
-  /// Requests the roster following RFC 6121.
-  Future<Result<RosterRequestResult, RosterError>> requestRoster() async {
+  /// Requests the roster following RFC 6121. If [useRosterVersion] is set to false, then
+  /// roster versioning will not be used, even if the server supports it and we have a last
+  /// known roster version.
+  Future<Result<RosterRequestResult, RosterError>> requestRoster({
+    bool useRosterVersion = true,
+  }) async {
     final attrs = getAttributes();
     final query = XMLNode.xmlns(
       tag: 'query',
       xmlns: rosterXmlns,
     );
     final rosterVersion = await _stateManager.getRosterVersion();
-    if (rosterVersion != null && rosterVersioningAvailable()) {
+    if (rosterVersion != null &&
+        rosterVersioningAvailable() &&
+        useRosterVersion) {
       query.attributes['ver'] = rosterVersion;
     }
 
-    final response = await attrs.sendStanza(
-      Stanza.iq(
-        type: 'get',
-        children: [
-          query,
-        ],
+    final response = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'get',
+          children: [
+            query,
+          ],
+        ),
       ),
-    );
+    ))!;
 
     if (response.attributes['type'] != 'result') {
       logger.warning('Error requesting roster: ${response.toXml()}');
@@ -250,7 +276,7 @@ class RosterManager extends XmppManagerBase {
     }
 
     final responseQuery = response.firstTag('query', xmlns: rosterXmlns);
-    return _handleRosterResponse(responseQuery);
+    return _handleRosterResponse(responseQuery, rosterVersion);
   }
 
   /// Requests a series of roster pushes according to RFC6121. Requires that the server
@@ -258,20 +284,23 @@ class RosterManager extends XmppManagerBase {
   Future<Result<RosterRequestResult?, RosterError>>
       requestRosterPushes() async {
     final attrs = getAttributes();
-    final result = await attrs.sendStanza(
-      Stanza.iq(
-        type: 'get',
-        children: [
-          XMLNode.xmlns(
-            tag: 'query',
-            xmlns: rosterXmlns,
-            attributes: {
-              'ver': await _stateManager.getRosterVersion() ?? '',
-            },
-          )
-        ],
+    final rosterVersion = await _stateManager.getRosterVersion();
+    final result = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'get',
+          children: [
+            XMLNode.xmlns(
+              tag: 'query',
+              xmlns: rosterXmlns,
+              attributes: {
+                'ver': rosterVersion ?? '',
+              },
+            ),
+          ],
+        ),
       ),
-    );
+    ))!;
 
     if (result.attributes['type'] != 'result') {
       logger.warning('Requesting roster pushes failed: ${result.toXml()}');
@@ -279,7 +308,7 @@ class RosterManager extends XmppManagerBase {
     }
 
     final query = result.firstTag('query', xmlns: rosterXmlns);
-    return _handleRosterResponse(query);
+    return _handleRosterResponse(query, rosterVersion);
   }
 
   bool rosterVersioningAvailable() {
@@ -296,31 +325,31 @@ class RosterManager extends XmppManagerBase {
     List<String>? groups,
   }) async {
     final attrs = getAttributes();
-    final response = await attrs.sendStanza(
-      Stanza.iq(
-        type: 'set',
-        children: [
-          XMLNode.xmlns(
-            tag: 'query',
-            xmlns: rosterXmlns,
-            children: [
-              XMLNode(
-                tag: 'item',
-                attributes: <String, String>{
-                  'jid': jid,
-                  ...title == jid.split('@')[0]
-                      ? <String, String>{}
-                      : <String, String>{'name': title}
-                },
-                children: (groups ?? [])
-                    .map((group) => XMLNode(tag: 'group', text: group))
-                    .toList(),
-              )
-            ],
-          )
-        ],
+    final response = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          children: [
+            XMLNode.xmlns(
+              tag: 'query',
+              xmlns: rosterXmlns,
+              children: [
+                XMLNode(
+                  tag: 'item',
+                  attributes: <String, String>{
+                    'jid': jid,
+                    if (title == jid.split('@')[0]) 'name': title,
+                  },
+                  children: (groups ?? [])
+                      .map((group) => XMLNode(tag: 'group', text: group))
+                      .toList(),
+                ),
+              ],
+            ),
+          ],
+        ),
       ),
-    );
+    ))!;
 
     if (response.attributes['type'] != 'result') {
       logger.severe('Error adding $jid to roster: $response');
@@ -334,26 +363,28 @@ class RosterManager extends XmppManagerBase {
   /// false otherwise.
   Future<RosterRemovalResult> removeFromRoster(String jid) async {
     final attrs = getAttributes();
-    final response = await attrs.sendStanza(
-      Stanza.iq(
-        type: 'set',
-        children: [
-          XMLNode.xmlns(
-            tag: 'query',
-            xmlns: rosterXmlns,
-            children: [
-              XMLNode(
-                tag: 'item',
-                attributes: <String, String>{
-                  'jid': jid,
-                  'subscription': 'remove'
-                },
-              )
-            ],
-          )
-        ],
+    final response = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          children: [
+            XMLNode.xmlns(
+              tag: 'query',
+              xmlns: rosterXmlns,
+              children: [
+                XMLNode(
+                  tag: 'item',
+                  attributes: {
+                    'jid': jid,
+                    'subscription': 'remove',
+                  },
+                ),
+              ],
+            ),
+          ],
+        ),
       ),
-    );
+    ))!;
 
     if (response.attributes['type'] != 'result') {
       logger.severe('Failed to remove roster item: ${response.toXml()}');

packages/moxxmpp/lib/src/stanza.dart

@@ -1,28 +1,109 @@
+import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
-/// A simple description of the <error /> element that may be inside a stanza
-class StanzaError {
-  StanzaError(this.type, this.error);
-  String type;
-  String error;
+/// A description of a stanza to send.
+class StanzaDetails {
+  const StanzaDetails(
+    this.stanza, {
+    this.extensions,
+    this.addId = true,
+    this.awaitable = true,
+    this.shouldEncrypt = true,
+    this.encrypted = false,
+    this.forceEncryption = false,
+    this.bypassQueue = false,
+    this.postSendExtensions,
+  });
+
+  /// The stanza to send.
+  final Stanza stanza;
+
+  /// The extension data used for constructing the stanza.
+  final TypedMap<StanzaHandlerExtension>? extensions;
+
+  /// Flag indicating whether a stanza id should be added before sending.
+  final bool addId;
+
+  /// Track the stanza to allow awaiting its response.
+  final bool awaitable;
+
+  final bool forceEncryption;
+
+  /// Flag indicating whether the stanza that is sent is already encrypted (true)
+  /// or not (false). This is only useful for E2EE implementations that have to
+  /// send heartbeats that must bypass themselves.
+  final bool encrypted;
+
+  /// Tells an E2EE implementation, if available, to encrypt the stanza (true) or
+  /// ignore the stanza (false).
+  final bool shouldEncrypt;
+
+  /// Bypasses being put into the queue. Useful for sending stanzas that must go out
+  /// now, where it's okay if it does not get sent.
+  /// This should never have to be set to true.
+  final bool bypassQueue;
+
+  /// This makes the Stream Management implementation, when available, ignore the stanza,
+  /// meaning that it gets counted but excluded from resending.
+  /// This should never have to be set to true.
+  final TypedMap<StanzaHandlerExtension>? postSendExtensions;
+}
+
+/// A general error type for errors.
+abstract class StanzaError {
+  static StanzaError? fromXMLNode(XMLNode node) {
+    final error = node.firstTag('error');
+    if (error == null) {
+      return null;
+    }
+
+    final specificError = error.firstTagByXmlns(fullStanzaXmlns);
+    if (specificError == null) {
+      return UnknownStanzaError();
+    }
+
+    switch (specificError.tag) {
+      case RemoteServerNotFoundError.tag:
+        return RemoteServerNotFoundError();
+      case RemoteServerTimeoutError.tag:
+        return RemoteServerTimeoutError();
+      case ServiceUnavailableError.tag:
+        return ServiceUnavailableError();
+    }
+
+    return UnknownStanzaError();
+  }
 
-  /// Returns a StanzaError if [stanza] contains a <error /> element. If not, returns
-  /// null.
   static StanzaError? fromStanza(Stanza stanza) {
-    final error = stanza.firstTag('error');
-    if (error == null) return null;
-
-    final stanzaError = error.firstTagByXmlns(fullStanzaXmlns);
-    if (stanzaError == null) return null;
-
-    return StanzaError(
-      error.attributes['type']! as String,
-      stanzaError.tag,
-    );
+    return fromXMLNode(stanza);
   }
 }
 
+/// Recipient does not provide a given service.
+/// https://xmpp.org/rfcs/rfc6120.html#stanzas-error-conditions-service-unavailable
+class ServiceUnavailableError extends StanzaError {
+  static const tag = 'service-unavailable';
+}
+
+/// Could not connect to the remote server.
+/// https://xmpp.org/rfcs/rfc6120.html#stanzas-error-conditions-remote-server-not-found
+class RemoteServerNotFoundError extends StanzaError {
+  static const tag = 'remote-server-not-found';
+}
+
+/// The connection to the remote server timed out.
+/// https://xmpp.org/rfcs/rfc6120.html#stanzas-error-conditions-remote-server-timeout
+class RemoteServerTimeoutError extends StanzaError {
+  static const tag = 'remote-server-timeout';
+}
+
+/// An unknown error.
+class UnknownStanzaError extends StanzaError {}
+
+const _stanzaNotDefined = Object();
+
 class Stanza extends XMLNode {
   // ignore: use_super_parameters
   Stanza({
@@ -137,7 +218,7 @@ class Stanza extends XMLNode {
 
   Stanza copyWith({
     String? id,
-    String? from,
+    Object? from = _stanzaNotDefined,
     String? to,
     String? type,
     List<XMLNode>? children,
@@ -146,7 +227,7 @@ class Stanza extends XMLNode {
     return Stanza(
       tag: tag,
       to: to ?? this.to,
-      from: from ?? this.from,
+      from: from != _stanzaNotDefined ? from as String? : this.from,
       id: id ?? this.id,
       type: type ?? this.type,
       children: children ?? this.children,
@@ -169,15 +250,14 @@ XMLNode buildErrorElement(String type, String condition, {String? text}) {
       XMLNode.xmlns(
         tag: condition,
         xmlns: fullStanzaXmlns,
-        children: text != null
-            ? [
-                XMLNode.xmlns(
-                  tag: 'text',
-                  xmlns: fullStanzaXmlns,
-                  text: text,
-                )
-              ]
-            : [],
+        children: [
+          if (text != null)
+            XMLNode.xmlns(
+              tag: 'text',
+              xmlns: fullStanzaXmlns,
+              text: text,
+            ),
+        ],
       ),
     ],
   );

packages/moxxmpp/lib/src/types/result.dart

@@ -1,16 +0,0 @@
-class Result<T, V> {
-  const Result(this._data)
-      : assert(
-          _data is T || _data is V,
-          'Invalid data type: Must be either $T or $V',
-        );
-  final dynamic _data;
-
-  bool isType<S>() => _data is S;
-
-  S get<S>() {
-    assert(_data is S, 'Data is not $S');
-
-    return _data as S;
-  }
-}

packages/moxxmpp/lib/src/util/incoming_queue.dart

@@ -0,0 +1,97 @@
+import 'dart:async';
+import 'dart:collection';
+import 'package:logging/logging.dart';
+import 'package:moxxmpp/src/awaiter.dart';
+import 'package:moxxmpp/src/parser.dart';
+import 'package:synchronized/synchronized.dart';
+
+/// A queue for incoming [XMPPStreamObject]s to ensure "in order"
+/// processing (except for stanzas that are awaited).
+class IncomingStanzaQueue {
+  IncomingStanzaQueue(this._callback, this._stanzaAwaiter);
+
+  /// The queue for storing the completer of each
+  /// incoming stanza (or stream object to be precise).
+  /// Only access while holding the lock [_lock].
+  final Queue<Completer<void>> _queue = Queue();
+
+  /// Flag indicating whether a callback is already running (true)
+  /// or not. "a callback" and not "the callback" because awaited stanzas
+  /// are allowed to bypass the queue.
+  /// Only access while holding the lock [_lock].
+  bool _isRunning = false;
+
+  /// The function to call to process an incoming stream object.
+  final Future<void> Function(XMPPStreamObject) _callback;
+
+  /// Lock guarding both [_queue] and [_isRunning].
+  final Lock _lock = Lock();
+
+  /// Logger.
+  final Logger _log = Logger('IncomingStanzaQueue');
+
+  final StanzaAwaiter _stanzaAwaiter;
+
+  Future<void> _processStreamObject(
+    Future<void>? future,
+    XMPPStreamObject object,
+  ) async {
+    if (future == null) {
+      if (object is XMPPStreamElement) {
+        _log.finest(
+          'Bypassing queue for ${object.node.tag} (${object.node.attributes["id"]})',
+        );
+      }
+      return _callback(object);
+    }
+
+    // Wait for our turn.
+    await future;
+
+    // Run the callback.
+    await _callback(object);
+
+    // Run the next entry.
+    await _lock.synchronized(() {
+      if (_queue.isNotEmpty) {
+        _queue.removeFirst().complete();
+      } else {
+        _isRunning = false;
+      }
+    });
+  }
+
+  Future<void> addStanza(List<XMPPStreamObject> objects) async {
+    await _lock.synchronized(() async {
+      for (final object in objects) {
+        if (await canBypassQueue(object)) {
+          unawaited(
+            _processStreamObject(null, object),
+          );
+          continue;
+        }
+
+        final completer = Completer<void>();
+        if (_isRunning) {
+          _queue.add(completer);
+        } else {
+          _isRunning = true;
+          completer.complete();
+        }
+
+        unawaited(
+          _processStreamObject(completer.future, object),
+        );
+      }
+    });
+  }
+
+  Future<bool> canBypassQueue(XMPPStreamObject object) async {
+    if (object is XMPPStreamHeader) {
+      return false;
+    }
+
+    object as XMPPStreamElement;
+    return _stanzaAwaiter.isAwaited(object.node);
+  }
+}

packages/moxxmpp/lib/src/util/list.dart

@@ -0,0 +1,5 @@
+extension ListItemCountExtension<T> on List<T> {
+  int count(bool Function(T) matches) {
+    return where(matches).length;
+  }
+}

packages/moxxmpp/lib/src/util/queue.dart

@@ -1,37 +1,61 @@
 import 'dart:async';
 import 'dart:collection';
 import 'package:meta/meta.dart';
+import 'package:moxxmpp/src/stanza.dart';
+import 'package:moxxmpp/src/stringxml.dart';
 import 'package:synchronized/synchronized.dart';
 
-/// A job to be submitted to an [AsyncQueue].
-typedef AsyncQueueJob = Future<void> Function();
+class StanzaQueueEntry {
+  const StanzaQueueEntry(
+    this.details,
+    this.completer,
+  );
+
+  /// The actual data to send.
+  final StanzaDetails details;
+
+  /// The [Completer] to resolve when the response is received.
+  final Completer<XMLNode>? completer;
+}
+
+/// A function that is executed when a job is popped from the queue.
+typedef SendStanzaFunction = Future<void> Function(StanzaQueueEntry);
+
+/// A function that is called before popping a queue item. Should return true when
+/// the [SendStanzaFunction] can be executed.
+typedef CanSendCallback = Future<bool> Function();
 
 /// A (hopefully) async-safe queue that attempts to force
 /// in-order execution of its jobs.
-class AsyncQueue {
-  /// The lock for accessing [AsyncQueue._lock] and [AsyncQueue._running].
+class AsyncStanzaQueue {
+  AsyncStanzaQueue(
+    this._sendStanzaFunction,
+    this._canSendCallback,
+  );
+
+  /// The lock for accessing [AsyncStanzaQueue._queue].
   final Lock _lock = Lock();
 
   /// The actual job queue.
-  final Queue<AsyncQueueJob> _queue = Queue<AsyncQueueJob>();
+  final Queue<StanzaQueueEntry> _queue = Queue<StanzaQueueEntry>();
 
-  /// Indicates whether we are currently executing a job.
-  bool _running = false;
+  /// Sends the stanza when we can pop from the queue.
+  final SendStanzaFunction _sendStanzaFunction;
+
+  final CanSendCallback _canSendCallback;
 
   @visibleForTesting
-  Queue<AsyncQueueJob> get queue => _queue;
+  Queue<StanzaQueueEntry> get queue => _queue;
 
-  @visibleForTesting
-  bool get isRunning => _running;
+  /// Adds a job [entry] to the queue.
+  Future<void> enqueueStanza(StanzaQueueEntry entry) async {
+    await _lock.synchronized(() async {
+      _queue.add(entry);
 
-  /// Adds a job [job] to the queue.
-  Future<void> addJob(AsyncQueueJob job) async {
-    await _lock.synchronized(() {
-      _queue.add(job);
-
-      if (!_running && _queue.isNotEmpty) {
-        _running = true;
-        unawaited(_popJob());
+      if (_queue.isNotEmpty && await _canSendCallback()) {
+        unawaited(
+          _runJob(_queue.removeFirst()),
+        );
       }
     });
   }
@@ -40,16 +64,26 @@ class AsyncQueue {
     await _lock.synchronized(_queue.clear);
   }
 
-  Future<void> _popJob() async {
-    final job = _queue.removeFirst();
-    final future = job();
-    await future;
+  Future<void> _runJob(StanzaQueueEntry details) async {
+    await _sendStanzaFunction(details);
+
+    await _lock.synchronized(() async {
+      if (_queue.isNotEmpty && await _canSendCallback()) {
+        unawaited(
+          _runJob(_queue.removeFirst()),
+        );
+      }
+    });
+  }
+
+  Future<void> restart() async {
+    if (!(await _canSendCallback())) return;
 
     await _lock.synchronized(() {
       if (_queue.isNotEmpty) {
-        unawaited(_popJob());
-      } else {
-        _running = false;
+        unawaited(
+          _runJob(_queue.removeFirst()),
+        );
       }
     });
   }

packages/moxxmpp/lib/src/util/typed_map.dart

@@ -0,0 +1,25 @@
+/// A map, similar to Map, but always uses the type of the value as the key.
+class TypedMap<B> {
+  /// Create an empty typed map.
+  TypedMap();
+
+  /// Create a typed map from a list of values.
+  TypedMap.fromList(List<B> items) {
+    for (final item in items) {
+      _data[item.runtimeType] = item;
+    }
+  }
+
+  /// The internal mapping of type -> data
+  final Map<Object, B> _data = {};
+
+  /// Associate the type of [value] with [value] in the map.
+  void set<T extends B>(T value) {
+    _data[T] = value;
+  }
+
+  /// Return the object of type [T] from the map, if it has been stored.
+  T? get<T>() => _data[T] as T?;
+
+  Iterable<Object> get keys => _data.keys;
+}

packages/moxxmpp/lib/src/xeps/staging/extensible_file_thumbnails.dart

@@ -1,57 +0,0 @@
-import 'package:moxxmpp/src/stringxml.dart';
-
-/// NOTE: Specified by https://codeberg.org/moxxy/custom-xeps/src/branch/master/xep-xxxx-extensible-file-thumbnails.md
-
-const fileThumbnailsXmlns = 'proto:urn:xmpp:eft:0';
-const blurhashThumbnailType = '$fileThumbnailsXmlns:blurhash';
-
-abstract class Thumbnail {}
-
-class BlurhashThumbnail extends Thumbnail {
-  BlurhashThumbnail(this.hash);
-  final String hash;
-}
-
-Thumbnail? parseFileThumbnailElement(XMLNode node) {
-  assert(
-    node.attributes['xmlns'] == fileThumbnailsXmlns,
-    'Invalid element xmlns',
-  );
-  assert(node.tag == 'file-thumbnail', 'Invalid element name');
-
-  switch (node.attributes['type']!) {
-    case blurhashThumbnailType:
-      {
-        final hash = node.firstTag('blurhash')!.innerText();
-        return BlurhashThumbnail(hash);
-      }
-  }
-
-  return null;
-}
-
-XMLNode? _fromThumbnail(Thumbnail thumbnail) {
-  if (thumbnail is BlurhashThumbnail) {
-    return XMLNode(
-      tag: 'blurhash',
-      text: thumbnail.hash,
-    );
-  }
-
-  return null;
-}
-
-XMLNode constructFileThumbnailElement(Thumbnail thumbnail) {
-  final node = _fromThumbnail(thumbnail)!;
-  var type = '';
-  if (thumbnail is BlurhashThumbnail) {
-    type = blurhashThumbnailType;
-  }
-
-  return XMLNode.xmlns(
-    tag: 'file-thumbnail',
-    xmlns: fileThumbnailsXmlns,
-    attributes: {'type': type},
-    children: [node],
-  );
-}

packages/moxxmpp/lib/src/xeps/staging/file_upload_notification.dart

@@ -2,14 +2,70 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
+import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 import 'package:moxxmpp/src/xeps/xep_0446.dart';
 
 /// NOTE: Specified by https://github.com/PapaTutuWawa/custom-xeps/blob/master/xep-xxxx-file-upload-notifications.md
-
 const fileUploadNotificationXmlns = 'proto:urn:xmpp:fun:0';
 
+/// Indicates a file upload notification.
+class FileUploadNotificationData implements StanzaHandlerExtension {
+  const FileUploadNotificationData(this.metadata);
+
+  /// The file metadata indicated in the upload notification.
+  final FileMetadataData metadata;
+
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'file-upload',
+      xmlns: fileUploadNotificationXmlns,
+      children: [
+        metadata.toXML(),
+      ],
+    );
+  }
+}
+
+/// Indicates that a file upload has been cancelled.
+class FileUploadNotificationCancellationData implements StanzaHandlerExtension {
+  const FileUploadNotificationCancellationData(this.id);
+
+  /// The id of the upload notifiaction that is cancelled.
+  final String id;
+
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'cancelled',
+      xmlns: fileUploadNotificationXmlns,
+      attributes: {
+        'id': id,
+      },
+    );
+  }
+}
+
+/// Indicates that a file upload has been completed.
+class FileUploadNotificationReplacementData implements StanzaHandlerExtension {
+  const FileUploadNotificationReplacementData(this.id);
+
+  /// The id of the upload notifiaction that is replaced.
+  final String id;
+
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'replaces',
+      xmlns: fileUploadNotificationXmlns,
+      attributes: {
+        'id': id,
+      },
+    );
+  }
+}
+
 class FileUploadNotificationManager extends XmppManagerBase {
   FileUploadNotificationManager() : super(fileUploadNotificationManager);
 
@@ -47,11 +103,14 @@ class FileUploadNotificationManager extends XmppManagerBase {
   ) async {
     final funElement =
         message.firstTag('file-upload', xmlns: fileUploadNotificationXmlns)!;
-    return state.copyWith(
-      fun: FileMetadataData.fromXML(
-        funElement.firstTag('file', xmlns: fileMetadataXmlns)!,
-      ),
-    );
+    return state
+      ..extensions.set(
+        FileUploadNotificationData(
+          FileMetadataData.fromXML(
+            funElement.firstTag('file', xmlns: fileMetadataXmlns)!,
+          ),
+        ),
+      );
   }
 
   Future<StanzaHandlerData> _onFileUploadNotificationReplacementReceived(
@@ -60,9 +119,12 @@ class FileUploadNotificationManager extends XmppManagerBase {
   ) async {
     final element =
         message.firstTag('replaces', xmlns: fileUploadNotificationXmlns)!;
-    return state.copyWith(
-      funReplacement: element.attributes['id']! as String,
-    );
+    return state
+      ..extensions.set(
+        FileUploadNotificationReplacementData(
+          element.attributes['id']! as String,
+        ),
+      );
   }
 
   Future<StanzaHandlerData> _onFileUploadNotificationCancellationReceived(
@@ -71,8 +133,42 @@ class FileUploadNotificationManager extends XmppManagerBase {
   ) async {
     final element =
         message.firstTag('cancels', xmlns: fileUploadNotificationXmlns)!;
-    return state.copyWith(
-      funCancellation: element.attributes['id']! as String,
-    );
+    return state
+      ..extensions.set(
+        FileUploadNotificationCancellationData(
+          element.attributes['id']! as String,
+        ),
+      );
+  }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final fun = extensions.get<FileUploadNotificationData>();
+    if (fun != null) {
+      return [fun.toXML()];
+    }
+
+    final cancel = extensions.get<FileUploadNotificationCancellationData>();
+    if (cancel != null) {
+      return [cancel.toXML()];
+    }
+
+    final replace = extensions.get<FileUploadNotificationReplacementData>();
+    if (replace != null) {
+      return [replace.toXML()];
+    }
+
+    return [];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0004.dart

@@ -1,4 +1,4 @@
-import 'package:moxlib/moxlib.dart';
+import 'package:collection/collection.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
@@ -10,14 +10,14 @@ class DataFormOption {
   XMLNode toXml() {
     return XMLNode(
       tag: 'option',
-      attributes: label != null
-          ? <String, dynamic>{'label': label}
-          : <String, dynamic>{},
+      attributes: {
+        if (label != null) 'label': label,
+      },
       children: [
         XMLNode(
           tag: 'value',
           text: value,
-        )
+        ),
       ],
     );
   }
@@ -45,19 +45,22 @@ class DataFormField {
     return XMLNode(
       tag: 'field',
       attributes: <String, dynamic>{
-        ...varAttr != null
-            ? <String, dynamic>{'var': varAttr}
-            : <String, dynamic>{},
-        ...type != null ? <String, dynamic>{'type': type} : <String, dynamic>{},
-        ...label != null
-            ? <String, dynamic>{'label': label}
-            : <String, dynamic>{}
+        if (varAttr != null) 'var': varAttr,
+        if (type != null) 'type': type,
+        if (label != null) 'label': label,
       },
       children: [
-        ...description != null ? [XMLNode(tag: 'desc', text: description)] : [],
-        ...isRequired ? [XMLNode(tag: 'required')] : [],
+        if (description != null)
+          XMLNode(
+            tag: 'desc',
+            text: description,
+          ),
+        if (isRequired)
+          XMLNode(
+            tag: 'required',
+          ),
         ...values.map((value) => XMLNode(tag: 'value', text: value)),
-        ...options.map((option) => option.toXml())
+        ...options.map((option) => option.toXml()),
       ],
     );
   }
@@ -80,7 +83,7 @@ class DataForm {
   final List<List<DataFormField>> items;
 
   DataFormField? getFieldByVar(String varAttr) {
-    return firstWhereOrNull(fields, (field) => field.varAttr == varAttr);
+    return fields.firstWhereOrNull((field) => field.varAttr == varAttr);
   }
 
   XMLNode toXml() {

packages/moxxmpp/lib/src/xeps/xep_0030/cache.dart

@@ -1,4 +1,5 @@
 import 'package:meta/meta.dart';
+import 'package:moxxmpp/src/jid.dart';
 
 @internal
 @immutable
@@ -6,7 +7,7 @@ class DiscoCacheKey {
   const DiscoCacheKey(this.jid, this.node);
 
   /// The JID we're requesting disco data from.
-  final String jid;
+  final JID jid;
 
   /// Optionally the node we are requesting from.
   final String? node;

packages/moxxmpp/lib/src/xeps/xep_0030/errors.dart

@@ -1,7 +1,10 @@
-abstract class DiscoError {}
+import 'package:moxxmpp/src/stanza.dart';
 
+/// Base type for disco-related errors.
+abstract class DiscoError extends StanzaError {}
+
+/// An unspecified error that is not covered by another [DiscoError].
 class UnknownDiscoError extends DiscoError {}
 
+/// The received disco response is invalid in some shape or form.
 class InvalidResponseDiscoError extends DiscoError {}
-
-class ErrorResponseDiscoError extends DiscoError {}

packages/moxxmpp/lib/src/xeps/xep_0030/helpers.dart

@@ -1,33 +1,38 @@
+import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
 // TODO(PapaTutuWawa): Move types into types.dart
 
-Stanza buildDiscoInfoQueryStanza(String entity, String? node) {
+Stanza buildDiscoInfoQueryStanza(JID entity, String? node) {
   return Stanza.iq(
-    to: entity,
+    to: entity.toString(),
     type: 'get',
     children: [
       XMLNode.xmlns(
         tag: 'query',
         xmlns: discoInfoXmlns,
-        attributes: node != null ? {'node': node} : {},
-      )
+        attributes: {
+          if (node != null) 'node': node,
+        },
+      ),
     ],
   );
 }
 
-Stanza buildDiscoItemsQueryStanza(String entity, {String? node}) {
+Stanza buildDiscoItemsQueryStanza(JID entity, {String? node}) {
   return Stanza.iq(
-    to: entity,
+    to: entity.toString(),
     type: 'get',
     children: [
       XMLNode.xmlns(
         tag: 'query',
         xmlns: discoItemsXmlns,
-        attributes: node != null ? {'node': node} : {},
-      )
+        attributes: {
+          if (node != null) 'node': node,
+        },
+      ),
     ],
   );
 }

packages/moxxmpp/lib/src/xeps/xep_0030/types.dart

@@ -19,13 +19,11 @@ class Identity {
   XMLNode toXMLNode() {
     return XMLNode(
       tag: 'identity',
-      attributes: <String, dynamic>{
+      attributes: {
         'category': category,
         'type': type,
         'name': name,
-        ...lang == null
-            ? <String, dynamic>{}
-            : <String, dynamic>{'xml:lang': lang}
+        if (lang != null) 'xml:lang': lang,
       },
     );
   }
@@ -108,13 +106,13 @@ class DiscoInfo {
 @immutable
 class DiscoItem {
   const DiscoItem({required this.jid, this.node, this.name});
-  final String jid;
+  final JID jid;
   final String? node;
   final String? name;
 
   XMLNode toXml() {
     final attributes = {
-      'jid': jid,
+      'jid': jid.toString(),
     };
     if (node != null) {
       attributes['node'] = node!;

packages/moxxmpp/lib/src/xeps/xep_0030/xep_0030.dart

@@ -1,6 +1,6 @@
 import 'dart:async';
 import 'package:meta/meta.dart';
-import 'package:moxxmpp/src/connection.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
@@ -10,7 +10,6 @@ import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/util/wait.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/cache.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/errors.dart';
@@ -41,21 +40,15 @@ class DiscoManager extends XmppManagerBase {
   /// Disco identities that we advertise
   final List<Identity> _identities;
 
-  /// Map full JID to Capability hashes
-  final Map<String, CapabilityHashInfo> _capHashCache = {};
-
-  /// Map capability hash to the disco info
-  final Map<String, DiscoInfo> _capHashInfoCache = {};
-
   /// Map full JID to Disco Info
   final Map<DiscoCacheKey, DiscoInfo> _discoInfoCache = {};
 
   /// The tracker for tracking disco#info queries that are in flight.
-  final WaitForTracker<DiscoCacheKey, Result<DiscoError, DiscoInfo>>
+  final WaitForTracker<DiscoCacheKey, Result<StanzaError, DiscoInfo>>
       _discoInfoTracker = WaitForTracker();
 
   /// The tracker for tracking disco#info queries that are in flight.
-  final WaitForTracker<DiscoCacheKey, Result<DiscoError, List<DiscoItem>>>
+  final WaitForTracker<DiscoCacheKey, Result<StanzaError, List<DiscoItem>>>
       _discoItemsTracker = WaitForTracker();
 
   /// Cache lock
@@ -74,7 +67,7 @@ class DiscoManager extends XmppManagerBase {
   List<String> get features => _features;
 
   @visibleForTesting
-  WaitForTracker<DiscoCacheKey, Result<DiscoError, DiscoInfo>>
+  WaitForTracker<DiscoCacheKey, Result<StanzaError, DiscoInfo>>
       get infoTracker => _discoInfoTracker;
 
   @override
@@ -101,13 +94,7 @@ class DiscoManager extends XmppManagerBase {
 
   @override
   Future<void> onXmppEvent(XmppEvent event) async {
-    if (event is PresenceReceivedEvent) {
-      await _onPresence(event.jid, event.presence);
-    } else if (event is ConnectionStateChangedEvent) {
-      // TODO(Unknown): This handling is stupid. We should have an event that is
-      //                triggered when we cannot guarantee that everything is as
-      //                it was before.
-      if (event.state != XmppConnectionState.connected) return;
+    if (event is StreamNegotiationsDoneEvent) {
       if (event.resumed) return;
 
       // Cancel all waiting requests
@@ -135,6 +122,15 @@ class DiscoManager extends XmppManagerBase {
     _discoItemsCallbacks[node] = callback;
   }
 
+  /// Add a [DiscoCacheKey]-[DiscoInfo] pair [discoInfoEntry] to the internal cache.
+  Future<void> addCachedDiscoInfo(
+    MapEntry<DiscoCacheKey, DiscoInfo> discoInfoEntry,
+  ) async {
+    await _cacheLock.synchronized(() {
+      _discoInfoCache[discoInfoEntry.key] = discoInfoEntry.value;
+    });
+  }
+
   /// Adds a list of features to the possible disco info response.
   /// This function only adds features that are not already present in the disco features.
   void addFeatures(List<String> features) {
@@ -155,39 +151,6 @@ class DiscoManager extends XmppManagerBase {
     }
   }
 
-  Future<void> _onPresence(JID from, Stanza presence) async {
-    final c = presence.firstTag('c', xmlns: capsXmlns);
-    if (c == null) return;
-
-    final info = CapabilityHashInfo(
-      c.attributes['ver']! as String,
-      c.attributes['node']! as String,
-      c.attributes['hash']! as String,
-    );
-
-    // Check if we already know of that cache
-    var cached = false;
-    await _cacheLock.synchronized(() async {
-      if (!_capHashCache.containsKey(info.ver)) {
-        cached = true;
-      }
-    });
-    if (cached) return;
-
-    // Request the cap hash
-    logger.finest(
-      "Received capability hash we don't know about. Requesting it...",
-    );
-    final result =
-        await discoInfoQuery(from.toString(), node: '${info.node}#${info.ver}');
-    if (result.isType<DiscoError>()) return;
-
-    await _cacheLock.synchronized(() async {
-      _capHashCache[from.toString()] = info;
-      _capHashInfoCache[info.ver] = result.get<DiscoInfo>();
-    });
-  }
-
   /// Returns the [DiscoInfo] object that would be used as the response to a disco#info
   /// query against our bare JID with no node. The results node attribute is set
   /// to [node].
@@ -221,7 +184,7 @@ class DiscoManager extends XmppManagerBase {
         ],
       );
 
-      return state.copyWith(done: true);
+      return state..done = true;
     }
 
     await reply(
@@ -232,7 +195,7 @@ class DiscoManager extends XmppManagerBase {
       ],
     );
 
-    return state.copyWith(done: true);
+    return state..done = true;
   }
 
   Future<StanzaHandlerData> _onDiscoItemsRequest(
@@ -260,7 +223,7 @@ class DiscoManager extends XmppManagerBase {
         ],
       );
 
-      return state.copyWith(done: true);
+      return state..done = true;
     }
 
     return state;
@@ -268,11 +231,12 @@ class DiscoManager extends XmppManagerBase {
 
   Future<void> _exitDiscoInfoCriticalSection(
     DiscoCacheKey key,
-    Result<DiscoError, DiscoInfo> result,
+    Result<StanzaError, DiscoInfo> result,
+    bool shouldCache,
   ) async {
     await _cacheLock.synchronized(() async {
       // Add to cache if it is a result
-      if (result.isType<DiscoInfo>()) {
+      if (result.isType<DiscoInfo>() && shouldCache) {
         _discoInfoCache[key] = result.get<DiscoInfo>();
       }
     });
@@ -280,22 +244,40 @@ class DiscoManager extends XmppManagerBase {
     await _discoInfoTracker.resolve(key, result);
   }
 
-  /// Sends a disco info query to the (full) jid [entity], optionally with node=[node].
-  Future<Result<DiscoError, DiscoInfo>> discoInfoQuery(
-    String entity, {
+  /// Send a disco#info query to [entity]. If [node] is specified, then the disco#info
+  /// request will be directed against that one node of [entity].
+  ///
+  /// [shouldEncrypt] indicates to possible end-to-end encryption implementations whether
+  /// the request should be encrypted (true) or not (false).
+  ///
+  /// [shouldCache] indicates whether the successful result of the disco#info query
+  /// should be cached (true) or not(false).
+  Future<Result<StanzaError, DiscoInfo>> discoInfoQuery(
+    JID entity, {
     String? node,
-    bool shouldEncrypt = true,
+    bool shouldEncrypt = false,
+    bool shouldCache = true,
   }) async {
-    final cacheKey = DiscoCacheKey(entity, node);
     DiscoInfo? info;
+    final cacheKey = DiscoCacheKey(entity, node);
+    final ecm = getAttributes()
+        .getManagerById<EntityCapabilitiesManager>(entityCapabilitiesManager);
     final ffuture = await _cacheLock
-        .synchronized<Future<Future<Result<DiscoError, DiscoInfo>>?>?>(
+        .synchronized<Future<Future<Result<StanzaError, DiscoInfo>>?>?>(
             () async {
       // Check if we already know what the JID supports
       if (_discoInfoCache.containsKey(cacheKey)) {
         info = _discoInfoCache[cacheKey];
         return null;
       } else {
+        // Check if we know entity capabilities
+        if (ecm != null && node == null) {
+          info = await ecm.getCachedDiscoInfoFromJid(entity);
+          if (info != null) {
+            return null;
+          }
+        }
+
         return _discoInfoTracker.waitFor(cacheKey);
       }
     });
@@ -309,39 +291,43 @@ class DiscoManager extends XmppManagerBase {
       }
     }
 
-    final stanza = await getAttributes().sendStanza(
-      buildDiscoInfoQueryStanza(entity, node),
-      encrypted: !shouldEncrypt,
-    );
-    final query = stanza.firstTag('query');
-    if (query == null) {
-      final result = Result<DiscoError, DiscoInfo>(InvalidResponseDiscoError());
-      await _exitDiscoInfoCriticalSection(cacheKey, result);
+    final stanza = (await getAttributes().sendStanza(
+      StanzaDetails(
+        buildDiscoInfoQueryStanza(entity, node),
+        shouldEncrypt: shouldEncrypt,
+      ),
+    ))!;
+
+    // Error handling
+    if (stanza.attributes['type'] == 'error') {
+      final result =
+          Result<StanzaError, DiscoInfo>(StanzaError.fromXMLNode(stanza));
+      await _exitDiscoInfoCriticalSection(cacheKey, result, shouldCache);
       return result;
     }
 
-    if (stanza.attributes['type'] == 'error') {
-      //final error = stanza.firstTag('error');
-      final result = Result<DiscoError, DiscoInfo>(ErrorResponseDiscoError());
-      await _exitDiscoInfoCriticalSection(cacheKey, result);
+    final query = stanza.firstTag('query');
+    if (query == null) {
+      final result = Result<DiscoError, DiscoInfo>(InvalidResponseDiscoError());
+      await _exitDiscoInfoCriticalSection(cacheKey, result, shouldCache);
       return result;
     }
 
     final result = Result<DiscoError, DiscoInfo>(
       DiscoInfo.fromQuery(
         query,
-        JID.fromString(entity),
+        entity,
       ),
     );
-    await _exitDiscoInfoCriticalSection(cacheKey, result);
+    await _exitDiscoInfoCriticalSection(cacheKey, result, shouldCache);
     return result;
   }
 
   /// Sends a disco items query to the (full) jid [entity], optionally with node=[node].
-  Future<Result<DiscoError, List<DiscoItem>>> discoItemsQuery(
-    String entity, {
+  Future<Result<StanzaError, List<DiscoItem>>> discoItemsQuery(
+    JID entity, {
     String? node,
-    bool shouldEncrypt = true,
+    bool shouldEncrypt = false,
   }) async {
     final key = DiscoCacheKey(entity, node);
     final future = await _discoItemsTracker.waitFor(key);
@@ -349,10 +335,20 @@ class DiscoManager extends XmppManagerBase {
       return future;
     }
 
-    final stanza = await getAttributes().sendStanza(
-      buildDiscoItemsQueryStanza(entity, node: node),
-      encrypted: !shouldEncrypt,
-    ) as Stanza;
+    final stanza = (await getAttributes().sendStanza(
+      StanzaDetails(
+        buildDiscoItemsQueryStanza(entity, node: node),
+        encrypted: !shouldEncrypt,
+      ),
+    ))!;
+
+    // Error handling
+    if (stanza.attributes['type'] == 'error') {
+      final result =
+          Result<StanzaError, List<DiscoItem>>(StanzaError.fromXMLNode(stanza));
+      await _discoItemsTracker.resolve(key, result);
+      return result;
+    }
 
     final query = stanza.firstTag('query');
     if (query == null) {
@@ -362,20 +358,11 @@ class DiscoManager extends XmppManagerBase {
       return result;
     }
 
-    if (stanza.type == 'error') {
-      //final error = stanza.firstTag('error');
-      //print("Disco Items error: " + error.toXml());
-      final result =
-          Result<DiscoError, List<DiscoItem>>(ErrorResponseDiscoError());
-      await _discoItemsTracker.resolve(key, result);
-      return result;
-    }
-
     final items = query
         .findTags('item')
         .map(
           (node) => DiscoItem(
-            jid: node.attributes['jid']! as String,
+            jid: JID.fromString(node.attributes['jid']! as String),
             node: node.attributes['node'] as String?,
             name: node.attributes['name'] as String?,
           ),
@@ -387,18 +374,9 @@ class DiscoManager extends XmppManagerBase {
     return result;
   }
 
-  /// Queries information about a jid based on its node and capability hash.
-  Future<Result<DiscoError, DiscoInfo>> discoInfoCapHashQuery(
-    String jid,
-    String node,
-    String ver,
-  ) async {
-    return discoInfoQuery(jid, node: '$node#$ver');
-  }
-
   Future<Result<DiscoError, List<DiscoInfo>>> performDiscoSweep() async {
     final attrs = getAttributes();
-    final serverJid = attrs.getConnectionSettings().jid.domain;
+    final serverJid = attrs.getConnectionSettings().jid.toDomain();
     final infoResults = List<DiscoInfo>.empty(growable: true);
     final result = await discoInfoQuery(serverJid);
     if (result.isType<DiscoInfo>()) {
@@ -441,8 +419,8 @@ class DiscoManager extends XmppManagerBase {
   /// A wrapper function around discoInfoQuery: Returns true if the entity with JID
   /// [entity] supports the disco feature [feature]. If not, returns false.
   Future<bool> supportsFeature(JID entity, String feature) async {
-    final info = await discoInfoQuery(entity.toString());
-    if (info.isType<DiscoError>()) return false;
+    final info = await discoInfoQuery(entity);
+    if (info.isType<StanzaError>()) return false;
 
     return info.get<DiscoInfo>().features.contains(feature);
   }

packages/moxxmpp/lib/src/xeps/xep_0045/errors.dart

@@ -0,0 +1,25 @@
+/// Represents an error related to Multi-User Chat (MUC).
+abstract class MUCError {}
+
+/// Error indicating an invalid (non-supported) stanza received while going
+/// through normal operation/flow of an MUC.
+class InvalidStanzaFormat extends MUCError {}
+
+/// Represents an error indicating an abnormal condition while parsing
+/// the DiscoInfo response stanza in Multi-User Chat (MUC).
+class InvalidDiscoInfoResponse extends MUCError {}
+
+/// Returned when no nickname was specified from the client side while trying to
+/// perform some actions on the MUC, such as joining the room.
+class NoNicknameSpecified extends MUCError {}
+
+/// This error occurs when a user attempts to perform an action that requires
+/// them to be a member of a room, but they are not currently joined to
+/// that room.
+class RoomNotJoinedError extends MUCError {}
+
+/// Indicates that the MUC forbids us from joining, i.e. when we're banned.
+class JoinForbiddenError extends MUCError {}
+
+/// Indicates that an unspecific error occurred while joining.
+class MUCUnspecificError extends MUCError {}

packages/moxxmpp/lib/src/xeps/xep_0045/events.dart

@@ -0,0 +1,72 @@
+import 'package:moxxmpp/src/events.dart';
+import 'package:moxxmpp/src/jid.dart';
+import 'package:moxxmpp/src/xeps/xep_0045/types.dart';
+
+/// Triggered when the MUC changes our nickname.
+class OwnDataChangedEvent extends XmppEvent {
+  OwnDataChangedEvent(
+    this.roomJid,
+    this.nick,
+    this.affiliation,
+    this.role,
+  );
+
+  /// The JID of the room.
+  final JID roomJid;
+
+  /// Our nickname.
+  final String nick;
+
+  /// Our affiliation.
+  final Affiliation affiliation;
+
+  /// Our role.
+  final Role role;
+}
+
+/// Triggered when an entity joins the MUC.
+class MemberJoinedEvent extends XmppEvent {
+  MemberJoinedEvent(this.roomJid, this.member);
+
+  /// The JID of the room.
+  final JID roomJid;
+
+  /// The new member.
+  final RoomMember member;
+}
+
+/// Triggered when an entity changes their presence in the MUC.
+class MemberChangedEvent extends XmppEvent {
+  MemberChangedEvent(this.roomJid, this.member);
+
+  /// The JID of the room.
+  final JID roomJid;
+
+  /// The new member.
+  final RoomMember member;
+}
+
+/// Triggered when an entity leaves the MUC.
+class MemberLeftEvent extends XmppEvent {
+  MemberLeftEvent(this.roomJid, this.nick);
+
+  /// The JID of the room.
+  final JID roomJid;
+
+  /// The nick of the user who left.
+  final String nick;
+}
+
+/// Triggered when an entity changes their nick.
+class MemberChangedNickEvent extends XmppEvent {
+  MemberChangedNickEvent(this.roomJid, this.oldNick, this.newNick);
+
+  /// The JID of the room.
+  final JID roomJid;
+
+  /// The original nick.
+  final String oldNick;
+
+  /// The new nick.
+  final String newNick;
+}

packages/moxxmpp/lib/src/xeps/xep_0045/status_codes.dart

@@ -0,0 +1,2 @@
+const selfPresenceStatus = '110';
+const nicknameChangedStatus = '303';

packages/moxxmpp/lib/src/xeps/xep_0045/types.dart

@@ -0,0 +1,163 @@
+import 'package:collection/collection.dart';
+import 'package:moxxmpp/src/jid.dart';
+import 'package:moxxmpp/src/namespaces.dart';
+import 'package:moxxmpp/src/xeps/xep_0004.dart';
+import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
+
+class InvalidAffiliationException implements Exception {}
+
+class InvalidRoleException implements Exception {}
+
+enum Affiliation {
+  owner('owner'),
+  admin('admin'),
+  member('member'),
+  outcast('outcast'),
+  none('none');
+
+  const Affiliation(this.value);
+
+  factory Affiliation.fromString(String value) {
+    switch (value) {
+      case 'owner':
+        return Affiliation.owner;
+      case 'admin':
+        return Affiliation.admin;
+      case 'member':
+        return Affiliation.member;
+      case 'outcast':
+        return Affiliation.outcast;
+      case 'none':
+        return Affiliation.none;
+      default:
+        throw InvalidAffiliationException();
+    }
+  }
+
+  /// The value to use for an attribute referring to this affiliation.
+  final String value;
+}
+
+enum Role {
+  moderator('moderator'),
+  participant('participant'),
+  visitor('visitor'),
+  none('none');
+
+  const Role(this.value);
+
+  factory Role.fromString(String value) {
+    switch (value) {
+      case 'moderator':
+        return Role.moderator;
+      case 'participant':
+        return Role.participant;
+      case 'visitor':
+        return Role.visitor;
+      case 'none':
+        return Role.none;
+      default:
+        throw InvalidRoleException();
+    }
+  }
+
+  /// The value to use for an attribute referring to this role.
+  final String value;
+}
+
+class RoomInformation {
+  /// Represents information about a Multi-User Chat (MUC) room.
+  RoomInformation({
+    required this.jid,
+    required this.features,
+    required this.name,
+    this.roomInfo,
+  });
+
+  /// Constructs a [RoomInformation] object from a [DiscoInfo] object.
+  /// The [DiscoInfo] object contains the necessary information to populate
+  /// the [RoomInformation] fields.
+  factory RoomInformation.fromDiscoInfo({
+    required DiscoInfo discoInfo,
+  }) =>
+      RoomInformation(
+        jid: discoInfo.jid!,
+        features: discoInfo.features,
+        name: discoInfo.identities
+            .firstWhere((i) => i.category == 'conference')
+            .name!,
+        roomInfo: discoInfo.extendedInfo.firstWhereOrNull((form) {
+          final field = form.getFieldByVar(formVarFormType);
+          return field?.type == 'hidden' &&
+              field?.values.first == roomInfoFormType;
+        }),
+      );
+
+  /// The JID of the Multi-User Chat (MUC) room.
+  final JID jid;
+
+  /// A list of features supported by the Multi-User Chat (MUC) room.
+  final List<String> features;
+
+  /// The name or title of the Multi-User Chat (MUC) room.
+  final String name;
+
+  /// The data form containing room information.
+  final DataForm? roomInfo;
+}
+
+/// The used message-id and an optional origin-id.
+typedef PendingMessage = (String, String?);
+
+/// An entity inside a MUC room. The name "member" here does not refer to an affiliation of member.
+class RoomMember {
+  const RoomMember(this.nick, this.affiliation, this.role);
+
+  /// The entity's nickname.
+  final String nick;
+
+  /// The assigned affiliation.
+  final Affiliation affiliation;
+
+  /// The assigned role.
+  final Role role;
+
+  RoomMember copyWith({
+    String? nick,
+    Affiliation? affiliation,
+    Role? role,
+  }) {
+    return RoomMember(
+      nick ?? this.nick,
+      affiliation ?? this.affiliation,
+      role ?? this.role,
+    );
+  }
+}
+
+class RoomState {
+  RoomState({required this.roomJid, this.nick, required this.joined}) {
+    pendingMessages = List<PendingMessage>.empty(growable: true);
+  }
+
+  /// The JID of the room.
+  final JID roomJid;
+
+  /// The nick we're joined with.
+  String? nick;
+
+  /// Flag whether we're joined and can process messages
+  bool joined;
+
+  /// Our own affiliation inside the MUC.
+  Affiliation? affiliation;
+
+  /// Our own role inside the MUC.
+  Role? role;
+
+  /// The list of messages that we sent and are waiting for their echo.
+  late final List<PendingMessage> pendingMessages;
+
+  /// "List" of entities inside the MUC.
+  final Map<String, RoomMember> members = {};
+}

packages/moxxmpp/lib/src/xeps/xep_0045/xep_0045.dart

@@ -0,0 +1,512 @@
+import 'dart:async';
+import 'package:moxlib/moxlib.dart';
+import 'package:moxxmpp/src/events.dart';
+import 'package:moxxmpp/src/jid.dart';
+import 'package:moxxmpp/src/managers/base.dart';
+import 'package:moxxmpp/src/managers/data.dart';
+import 'package:moxxmpp/src/managers/handlers.dart';
+import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/namespaces.dart';
+import 'package:moxxmpp/src/presence.dart';
+import 'package:moxxmpp/src/stanza.dart';
+import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
+import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
+import 'package:moxxmpp/src/xeps/xep_0045/errors.dart';
+import 'package:moxxmpp/src/xeps/xep_0045/events.dart';
+import 'package:moxxmpp/src/xeps/xep_0045/status_codes.dart';
+import 'package:moxxmpp/src/xeps/xep_0045/types.dart';
+import 'package:moxxmpp/src/xeps/xep_0359.dart';
+import 'package:synchronized/synchronized.dart';
+
+/// (Room JID, nickname)
+typedef MUCRoomJoin = (JID, String);
+
+class MUCManager extends XmppManagerBase {
+  MUCManager() : super(mucManager);
+
+  @override
+  Future<bool> isSupported() async => true;
+
+  /// Map a room's JID to its RoomState
+  final Map<JID, RoomState> _mucRoomCache = {};
+
+  /// Mapp a room's JID to a completer waiting for the completion of the join process.
+  final Map<JID, Completer<Result<bool, MUCError>>> _mucRoomJoinCompleter = {};
+
+  /// Cache lock
+  final Lock _cacheLock = Lock();
+
+  /// Flag indicating whether we joined the rooms added to the room list with
+  /// [prepareRoomList].
+  bool _joinedPreparedRooms = true;
+
+  @override
+  List<StanzaHandler> getIncomingStanzaHandlers() => [
+        StanzaHandler(
+          stanzaTag: 'message',
+          callback: _onMessage,
+          // Before the message handler
+          priority: -99,
+        ),
+        StanzaHandler(
+          stanzaTag: 'presence',
+          callback: _onPresence,
+          tagName: 'x',
+          tagXmlns: mucUserXmlns,
+          // Before the PresenceManager
+          priority: PresenceManager.presenceHandlerPriority + 1,
+        ),
+      ];
+
+  @override
+  List<StanzaHandler> getOutgoingPreStanzaHandlers() => [
+        StanzaHandler(
+          stanzaTag: 'message',
+          callback: _onMessageSent,
+        ),
+      ];
+
+  @override
+  Future<void> onXmppEvent(XmppEvent event) async {
+    if (event is! StreamNegotiationsDoneEvent) {
+      return;
+    }
+
+    // Only attempt rejoining if we did not resume the stream and all
+    // prepared rooms are already joined.
+    if (event.resumed && _joinedPreparedRooms) {
+      return;
+    }
+
+    final mucJoins = List<MUCRoomJoin>.empty(growable: true);
+    await _cacheLock.synchronized(() async {
+      // Mark all groupchats as not joined.
+      for (final jid in _mucRoomCache.keys) {
+        _mucRoomCache[jid]!.joined = false;
+        _mucRoomJoinCompleter[jid] = Completer();
+
+        // Re-join all MUCs.
+        final state = _mucRoomCache[jid]!;
+        mucJoins.add((jid, state.nick!));
+      }
+    });
+
+    for (final join in mucJoins) {
+      final (jid, nick) = join;
+      await _sendMucJoin(
+        jid,
+        nick,
+        0,
+      );
+    }
+    _joinedPreparedRooms = true;
+  }
+
+  /// Prepares the internal room list to ensure that the rooms
+  /// [rooms] are joined once we are connected.
+  Future<void> prepareRoomList(List<MUCRoomJoin> rooms) async {
+    assert(
+      rooms.isNotEmpty,
+      'The room list should not be empty',
+    );
+
+    await _cacheLock.synchronized(() {
+      _joinedPreparedRooms = false;
+      for (final room in rooms) {
+        final (roomJid, nick) = room;
+        _mucRoomCache[roomJid] = RoomState(
+          roomJid: roomJid,
+          nick: nick,
+          joined: false,
+        );
+      }
+    });
+  }
+
+  /// Queries the information of a Multi-User Chat room.
+  ///
+  /// Retrieves the information about the specified MUC room by performing a
+  /// disco info query. Returns a [Result] with the [RoomInformation] on success
+  /// or an appropriate [MUCError] on failure.
+  Future<Result<RoomInformation, MUCError>> queryRoomInformation(
+    JID roomJID,
+  ) async {
+    final result = await getAttributes()
+        .getManagerById<DiscoManager>(discoManager)!
+        .discoInfoQuery(roomJID);
+    if (result.isType<StanzaError>()) {
+      return Result(InvalidStanzaFormat());
+    }
+    try {
+      final roomInformation = RoomInformation.fromDiscoInfo(
+        discoInfo: result.get<DiscoInfo>(),
+      );
+      return Result(roomInformation);
+    } catch (e) {
+      logger.warning('Invalid disco information: $e');
+      return Result(InvalidDiscoInfoResponse());
+    }
+  }
+
+  /// Joins a Multi-User Chat room.
+  ///
+  /// Joins the specified MUC room using the provided nickname. Sends a presence
+  /// stanza with the appropriate attributes to join the room. Returns a [Result]
+  /// with a boolean value indicating success or failure, or an [MUCError]
+  /// if applicable.
+  Future<Result<bool, MUCError>> joinRoom(
+    JID roomJid,
+    String nick, {
+    int? maxHistoryStanzas,
+  }) async {
+    if (nick.isEmpty) {
+      return Result(NoNicknameSpecified());
+    }
+
+    final completer =
+        await _cacheLock.synchronized<Completer<Result<bool, MUCError>>>(
+      () {
+        _mucRoomCache[roomJid] = RoomState(
+          roomJid: roomJid,
+          nick: nick,
+          joined: false,
+        );
+
+        final completer = Completer<Result<bool, MUCError>>();
+        _mucRoomJoinCompleter[roomJid] = completer;
+        return completer;
+      },
+    );
+
+    await _sendMucJoin(roomJid, nick, maxHistoryStanzas);
+    return completer.future;
+  }
+
+  Future<void> _sendMucJoin(
+    JID roomJid,
+    String nick,
+    int? maxHistoryStanzas,
+  ) async {
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.presence(
+          to: roomJid.withResource(nick).toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'x',
+              xmlns: mucXmlns,
+              children: [
+                if (maxHistoryStanzas != null)
+                  XMLNode(
+                    tag: 'history',
+                    attributes: {
+                      'maxstanzas': maxHistoryStanzas.toString(),
+                    },
+                  ),
+              ],
+            ),
+          ],
+        ),
+        awaitable: false,
+      ),
+    );
+  }
+
+  /// Leaves a Multi-User Chat room.
+  ///
+  /// Leaves the specified MUC room by sending an 'unavailable' presence stanza.
+  /// Removes the corresponding room entry from the cache. Returns a [Result]
+  /// with a boolean value indicating success or failure, or an [MUCError]
+  /// if applicable.
+  Future<Result<bool, MUCError>> leaveRoom(
+    JID roomJid,
+  ) async {
+    final nick = await _cacheLock.synchronized(() {
+      final nick = _mucRoomCache[roomJid]?.nick;
+      _mucRoomCache.remove(roomJid);
+      return nick;
+    });
+    if (nick == null) {
+      return Result(RoomNotJoinedError());
+    }
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.presence(
+          to: roomJid.withResource(nick).toString(),
+          type: 'unavailable',
+        ),
+        awaitable: false,
+      ),
+    );
+    return const Result(true);
+  }
+
+  Future<RoomState?> getRoomState(JID roomJid) async {
+    return _cacheLock.synchronized(() => _mucRoomCache[roomJid]);
+  }
+
+  Future<StanzaHandlerData> _onPresence(
+    Stanza presence,
+    StanzaHandlerData state,
+  ) async {
+    if (presence.from == null) {
+      logger.finest('Ignoring presence as it has no from attribute');
+      return state;
+    }
+
+    final from = JID.fromString(presence.from!);
+    final bareFrom = from.toBare();
+    return _cacheLock.synchronized(() {
+      logger.finest('Lock aquired for presence from ${presence.from}');
+      final room = _mucRoomCache[bareFrom];
+      if (room == null) {
+        logger.finest('Ignoring presence as it does not belong to a room');
+        return state;
+      }
+
+      if (from.resource.isEmpty) {
+        // TODO(Unknown): Handle presence from the room itself.
+        logger.finest('Ignoring presence as it has no resource');
+        return state;
+      }
+
+      if (presence.type == 'error') {
+        final errorTag = presence.firstTag('error')!;
+        final error = errorTag.firstTagByXmlns(fullStanzaXmlns)!;
+        Result<bool, MUCError> result;
+        if (error.tag == 'forbidden') {
+          result = Result(JoinForbiddenError());
+        } else {
+          result = Result(MUCUnspecificError());
+        }
+
+        _mucRoomCache.remove(bareFrom);
+        _mucRoomJoinCompleter[bareFrom]!.complete(result);
+        _mucRoomJoinCompleter.remove(bareFrom);
+        return StanzaHandlerData(
+          true,
+          false,
+          presence,
+          state.extensions,
+        );
+      }
+
+      final x = presence.firstTag('x', xmlns: mucUserXmlns)!;
+      final item = x.firstTag('item')!;
+      final statuses = x
+          .findTags('status')
+          .map((s) => s.attributes['code']! as String)
+          .toList();
+      final role = Role.fromString(
+        item.attributes['role']! as String,
+      );
+      final affiliation = Affiliation.fromString(
+        item.attributes['affiliation']! as String,
+      );
+
+      if (statuses.contains(selfPresenceStatus)) {
+        if (room.joined) {
+          if (room.nick != from.resource ||
+              room.affiliation != affiliation ||
+              room.role != role) {
+            // Notify us of the changed data.
+            getAttributes().sendEvent(
+              OwnDataChangedEvent(
+                bareFrom,
+                from.resource,
+                affiliation,
+                role,
+              ),
+            );
+          }
+        }
+
+        // Set the data to make sure we're in sync with the MUC.
+        room
+          ..nick = from.resource
+          ..affiliation = affiliation
+          ..role = role;
+        logger.finest('Self-presence handled');
+        return StanzaHandlerData(
+          true,
+          false,
+          presence,
+          state.extensions,
+        );
+      }
+
+      if (presence.attributes['type'] == 'unavailable') {
+        if (role == Role.none) {
+          // Cannot happen while joining, so we assume we are joined
+          assert(
+            room.joined,
+            'Should not receive unavailable with role="none" while joining',
+          );
+          room.members.remove(from.resource);
+          getAttributes().sendEvent(
+            MemberLeftEvent(
+              bareFrom,
+              from.resource,
+            ),
+          );
+        } else if (statuses.contains(nicknameChangedStatus)) {
+          assert(
+            room.joined,
+            'Should not receive nick change while joining',
+          );
+          final newNick = item.attributes['nick']! as String;
+          final member = RoomMember(
+            newNick,
+            Affiliation.fromString(
+              item.attributes['affiliation']! as String,
+            ),
+            role,
+          );
+
+          // Remove the old member.
+          room.members.remove(from.resource);
+
+          // Add the "new" member".
+          room.members[newNick] = member;
+
+          // Trigger an event.
+          getAttributes().sendEvent(
+            MemberChangedNickEvent(
+              bareFrom,
+              from.resource,
+              newNick,
+            ),
+          );
+        }
+      } else {
+        final member = RoomMember(
+          from.resource,
+          Affiliation.fromString(
+            item.attributes['affiliation']! as String,
+          ),
+          role,
+        );
+        logger.finest('Got presence from ${from.resource} in $bareFrom');
+        if (room.joined) {
+          if (room.members.containsKey(from.resource)) {
+            getAttributes().sendEvent(
+              MemberChangedEvent(
+                bareFrom,
+                member,
+              ),
+            );
+          } else {
+            getAttributes().sendEvent(
+              MemberJoinedEvent(
+                bareFrom,
+                member,
+              ),
+            );
+          }
+        }
+
+        room.members[from.resource] = member;
+        logger.finest('${from.resource} added to the member list');
+      }
+
+      logger.finest('Ran through');
+      return StanzaHandlerData(
+        true,
+        false,
+        presence,
+        state.extensions,
+      );
+    });
+  }
+
+  Future<StanzaHandlerData> _onMessageSent(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
+    if (message.to == null) {
+      return state;
+    }
+    final toJid = JID.fromString(message.to!);
+
+    return _cacheLock.synchronized(() {
+      if (!_mucRoomCache.containsKey(toJid)) {
+        return state;
+      }
+
+      _mucRoomCache[toJid]!.pendingMessages.add(
+        (message.id!, state.extensions.get<StableIdData>()?.originId),
+      );
+      return state;
+    });
+  }
+
+  Future<StanzaHandlerData> _onMessage(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
+    final fromJid = JID.fromString(message.from!);
+    final roomJid = fromJid.toBare();
+    return _cacheLock.synchronized(() {
+      logger.finest('Lock aquired for message from ${message.from}');
+      final roomState = _mucRoomCache[roomJid];
+      if (roomState == null) {
+        return state;
+      }
+
+      if (message.type == 'groupchat' && message.firstTag('subject') != null) {
+        // The room subject marks the end of the join flow.
+        if (!roomState.joined) {
+          // Mark the room as joined.
+          _mucRoomCache[roomJid]!.joined = true;
+          _mucRoomJoinCompleter[roomJid]!.complete(
+            const Result(true),
+          );
+          _mucRoomJoinCompleter.remove(roomJid);
+          logger.finest('$roomJid is now joined');
+        }
+
+        // TODO(Unknown): Signal the subject?
+
+        return StanzaHandlerData(
+          true,
+          false,
+          message,
+          state.extensions,
+        );
+      } else {
+        if (!roomState.joined) {
+          // Ignore the discussion history.
+          return StanzaHandlerData(
+            true,
+            false,
+            message,
+            state.extensions,
+          );
+        }
+
+        // Check if this is the message reflection.
+        if (message.id == null) {
+          return state;
+        }
+        final pending =
+            (message.id!, state.extensions.get<StableIdData>()?.originId);
+        if (fromJid.resource == roomState.nick &&
+            roomState.pendingMessages.contains(pending)) {
+          // Silently drop the message.
+          roomState.pendingMessages.remove(pending);
+
+          // TODO(Unknown): Maybe send an event stating that we received the reflection.
+          return StanzaHandlerData(
+            true,
+            false,
+            message,
+            state.extensions,
+          );
+        }
+      }
+
+      return state;
+    });
+  }
+}

packages/moxxmpp/lib/src/xeps/xep_0054.dart

@@ -1,3 +1,4 @@
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
@@ -7,7 +8,6 @@ import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 
 abstract class VCardError {}
 
@@ -38,7 +38,7 @@ class VCardManager extends XmppManagerBase {
           tagName: 'x',
           tagXmlns: vCardTempUpdate,
           callback: _onPresence,
-        )
+        ),
       ];
 
   @override
@@ -56,31 +56,13 @@ class VCardManager extends XmppManagerBase {
     final x = presence.firstTag('x', xmlns: vCardTempUpdate)!;
     final hash = x.firstTag('photo')!.innerText();
 
-    final from = JID.fromString(presence.from!).toBare().toString();
-    final lastHash = _lastHash[from];
-    if (lastHash != hash) {
-      _lastHash[from] = hash;
-      final vcardResult = await requestVCard(from);
-
-      if (vcardResult.isType<VCard>()) {
-        final binval = vcardResult.get<VCard>().photo?.binval;
-        if (binval != null) {
-          getAttributes().sendEvent(
-            AvatarUpdatedEvent(
-              jid: from,
-              base64: binval,
-              hash: hash,
-            ),
-          );
-        } else {
-          logger.warning('No avatar data found');
-        }
-      } else {
-        logger.warning('Failed to retrieve vCard for $from');
-      }
-    }
-
-    return state.copyWith(done: true);
+    getAttributes().sendEvent(
+      VCardAvatarUpdatedEvent(
+        JID.fromString(presence.from!),
+        hash,
+      ),
+    );
+    return state;
   }
 
   VCardPhoto? _parseVCardPhoto(XMLNode? node) {
@@ -102,20 +84,22 @@ class VCardManager extends XmppManagerBase {
     );
   }
 
-  Future<Result<VCardError, VCard>> requestVCard(String jid) async {
-    final result = await getAttributes().sendStanza(
-      Stanza.iq(
-        to: jid,
-        type: 'get',
-        children: [
-          XMLNode.xmlns(
-            tag: 'vCard',
-            xmlns: vCardTempXmlns,
-          )
-        ],
+  Future<Result<VCardError, VCard>> requestVCard(JID jid) async {
+    final result = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          to: jid.toString(),
+          type: 'get',
+          children: [
+            XMLNode.xmlns(
+              tag: 'vCard',
+              xmlns: vCardTempXmlns,
+            ),
+          ],
+        ),
+        encrypted: true,
       ),
-      encrypted: true,
-    );
+    ))!;
 
     if (result.attributes['type'] != 'result') {
       return Result(UnknownVCardError());

packages/moxxmpp/lib/src/xeps/xep_0060/xep_0060.dart

@@ -1,5 +1,5 @@
-import 'package:freezed_annotation/freezed_annotation.dart';
 import 'package:meta/meta.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
@@ -9,7 +9,6 @@ import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0004.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
@@ -39,26 +38,20 @@ class PubSubPublishOptions {
           varAttr: 'FORM_TYPE',
           type: 'hidden',
         ),
-        ...accessModel != null
-            ? [
-                DataFormField(
-                  options: [],
-                  isRequired: false,
-                  values: [accessModel!],
-                  varAttr: 'pubsub#access_model',
-                )
-              ]
-            : [],
-        ...maxItems != null
-            ? [
-                DataFormField(
-                  options: [],
-                  isRequired: false,
-                  values: [maxItems!],
-                  varAttr: 'pubsub#max_items',
-                ),
-              ]
-            : [],
+        if (accessModel != null)
+          DataFormField(
+            options: [],
+            isRequired: false,
+            values: [accessModel!],
+            varAttr: 'pubsub#access_model',
+          ),
+        if (maxItems != null)
+          DataFormField(
+            options: [],
+            isRequired: false,
+            values: [maxItems!],
+            varAttr: 'pubsub#max_items',
+          ),
       ],
     ).toXml();
   }
@@ -88,7 +81,7 @@ class PubSubManager extends XmppManagerBase {
           tagName: 'event',
           tagXmlns: pubsubEventXmlns,
           callback: _onPubsubMessage,
-        )
+        ),
       ];
 
   @override
@@ -114,10 +107,10 @@ class PubSubManager extends XmppManagerBase {
       ),
     );
 
-    return state.copyWith(done: true);
+    return state..done = true;
   }
 
-  Future<int> _getNodeItemCount(String jid, String node) async {
+  Future<int> _getNodeItemCount(JID jid, String node) async {
     final dm = getAttributes().getManagerById<DiscoManager>(discoManager)!;
     final response = await dm.discoItemsQuery(jid, node: node);
     var count = 0;
@@ -136,7 +129,7 @@ class PubSubManager extends XmppManagerBase {
   //                     with the requested configuration.
   @visibleForTesting
   Future<PubSubPublishOptions> preprocessPublishOptions(
-    String jid,
+    JID jid,
     String node,
     PubSubPublishOptions options,
   ) async {
@@ -179,29 +172,32 @@ class PubSubManager extends XmppManagerBase {
     return options;
   }
 
-  Future<Result<PubSubError, bool>> subscribe(String jid, String node) async {
+  Future<Result<PubSubError, bool>> subscribe(JID jid, String node) async {
     final attrs = getAttributes();
-    final result = await attrs.sendStanza(
-      Stanza.iq(
-        type: 'set',
-        to: jid,
-        children: [
-          XMLNode.xmlns(
-            tag: 'pubsub',
-            xmlns: pubsubXmlns,
-            children: [
-              XMLNode(
-                tag: 'subscribe',
-                attributes: <String, String>{
-                  'node': node,
-                  'jid': attrs.getFullJID().toBare().toString(),
-                },
-              ),
-            ],
-          ),
-        ],
+    final result = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          to: jid.toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'pubsub',
+              xmlns: pubsubXmlns,
+              children: [
+                XMLNode(
+                  tag: 'subscribe',
+                  attributes: <String, String>{
+                    'node': node,
+                    'jid': attrs.getFullJID().toBare().toString(),
+                  },
+                ),
+              ],
+            ),
+          ],
+        ),
+        shouldEncrypt: false,
       ),
-    );
+    ))!;
 
     if (result.attributes['type'] != 'result') {
       return Result(UnknownPubSubError());
@@ -220,29 +216,32 @@ class PubSubManager extends XmppManagerBase {
     return Result(subscription.attributes['subscription'] == 'subscribed');
   }
 
-  Future<Result<PubSubError, bool>> unsubscribe(String jid, String node) async {
+  Future<Result<PubSubError, bool>> unsubscribe(JID jid, String node) async {
     final attrs = getAttributes();
-    final result = await attrs.sendStanza(
-      Stanza.iq(
-        type: 'set',
-        to: jid,
-        children: [
-          XMLNode.xmlns(
-            tag: 'pubsub',
-            xmlns: pubsubXmlns,
-            children: [
-              XMLNode(
-                tag: 'unsubscribe',
-                attributes: <String, String>{
-                  'node': node,
-                  'jid': attrs.getFullJID().toBare().toString(),
-                },
-              ),
-            ],
-          ),
-        ],
+    final result = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          to: jid.toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'pubsub',
+              xmlns: pubsubXmlns,
+              children: [
+                XMLNode(
+                  tag: 'unsubscribe',
+                  attributes: <String, String>{
+                    'node': node,
+                    'jid': attrs.getFullJID().toBare().toString(),
+                  },
+                ),
+              ],
+            ),
+          ],
+        ),
+        shouldEncrypt: false,
       ),
-    );
+    ))!;
 
     if (result.attributes['type'] != 'result') {
       return Result(UnknownPubSubError());
@@ -264,7 +263,7 @@ class PubSubManager extends XmppManagerBase {
   /// Publish [payload] to the PubSub node [node] on JID [jid]. Returns true if it
   /// was successful. False otherwise.
   Future<Result<PubSubError, bool>> publish(
-    String jid,
+    JID jid,
     String node,
     XMLNode payload, {
     String? id,
@@ -280,7 +279,7 @@ class PubSubManager extends XmppManagerBase {
   }
 
   Future<Result<PubSubError, bool>> _publish(
-    String jid,
+    JID jid,
     String node,
     XMLNode payload, {
     String? id,
@@ -293,38 +292,41 @@ class PubSubManager extends XmppManagerBase {
       pubOptions = await preprocessPublishOptions(jid, node, options);
     }
 
-    final result = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'set',
-        to: jid,
-        children: [
-          XMLNode.xmlns(
-            tag: 'pubsub',
-            xmlns: pubsubXmlns,
-            children: [
-              XMLNode(
-                tag: 'publish',
-                attributes: <String, String>{'node': node},
-                children: [
-                  XMLNode(
-                    tag: 'item',
-                    attributes: id != null
-                        ? <String, String>{'id': id}
-                        : <String, String>{},
-                    children: [payload],
-                  )
-                ],
-              ),
-              if (pubOptions != null)
+    final result = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          to: jid.toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'pubsub',
+              xmlns: pubsubXmlns,
+              children: [
                 XMLNode(
-                  tag: 'publish-options',
-                  children: [pubOptions.toXml()],
+                  tag: 'publish',
+                  attributes: <String, String>{'node': node},
+                  children: [
+                    XMLNode(
+                      tag: 'item',
+                      attributes: {
+                        if (id != null) 'id': id,
+                      },
+                      children: [payload],
+                    ),
+                  ],
                 ),
-            ],
-          )
-        ],
+                if (pubOptions != null)
+                  XMLNode(
+                    tag: 'publish-options',
+                    children: [pubOptions.toXml()],
+                  ),
+              ],
+            ),
+          ],
+        ),
+        shouldEncrypt: false,
       ),
-    );
+    ))!;
     if (result.attributes['type'] != 'result') {
       final error = getPubSubError(result);
 
@@ -392,24 +394,34 @@ class PubSubManager extends XmppManagerBase {
   }
 
   Future<Result<PubSubError, List<PubSubItem>>> getItems(
-    String jid,
-    String node,
-  ) async {
-    final result = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'get',
-        to: jid,
-        children: [
-          XMLNode.xmlns(
-            tag: 'pubsub',
-            xmlns: pubsubXmlns,
-            children: [
-              XMLNode(tag: 'items', attributes: <String, String>{'node': node}),
-            ],
-          )
-        ],
+    JID jid,
+    String node, {
+    int? maxItems,
+  }) async {
+    final result = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'get',
+          to: jid.toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'pubsub',
+              xmlns: pubsubXmlns,
+              children: [
+                XMLNode(
+                  tag: 'items',
+                  attributes: {
+                    'node': node,
+                    if (maxItems != null) 'max_items': maxItems.toString(),
+                  },
+                ),
+              ],
+            ),
+          ],
+        ),
+        shouldEncrypt: false,
       ),
-    );
+    ))!;
 
     if (result.attributes['type'] != 'result') {
       return Result(getPubSubError(result));
@@ -432,34 +444,37 @@ class PubSubManager extends XmppManagerBase {
   }
 
   Future<Result<PubSubError, PubSubItem>> getItem(
-    String jid,
+    JID jid,
     String node,
     String id,
   ) async {
-    final result = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'get',
-        to: jid,
-        children: [
-          XMLNode.xmlns(
-            tag: 'pubsub',
-            xmlns: pubsubXmlns,
-            children: [
-              XMLNode(
-                tag: 'items',
-                attributes: <String, String>{'node': node},
-                children: [
-                  XMLNode(
-                    tag: 'item',
-                    attributes: <String, String>{'id': id},
-                  ),
-                ],
-              ),
-            ],
-          ),
-        ],
+    final result = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'get',
+          to: jid.toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'pubsub',
+              xmlns: pubsubXmlns,
+              children: [
+                XMLNode(
+                  tag: 'items',
+                  attributes: <String, String>{'node': node},
+                  children: [
+                    XMLNode(
+                      tag: 'item',
+                      attributes: <String, String>{'id': id},
+                    ),
+                  ],
+                ),
+              ],
+            ),
+          ],
+        ),
+        shouldEncrypt: false,
       ),
-    );
+    ))!;
 
     if (result.attributes['type'] != 'result') {
       return Result(getPubSubError(result));
@@ -481,60 +496,66 @@ class PubSubManager extends XmppManagerBase {
   }
 
   Future<Result<PubSubError, bool>> configure(
-    String jid,
+    JID jid,
     String node,
     PubSubPublishOptions options,
   ) async {
     final attrs = getAttributes();
 
     // Request the form
-    final form = await attrs.sendStanza(
-      Stanza.iq(
-        type: 'get',
-        to: jid,
-        children: [
-          XMLNode.xmlns(
-            tag: 'pubsub',
-            xmlns: pubsubOwnerXmlns,
-            children: [
-              XMLNode(
-                tag: 'configure',
-                attributes: <String, String>{
-                  'node': node,
-                },
-              ),
-            ],
-          ),
-        ],
+    final form = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'get',
+          to: jid.toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'pubsub',
+              xmlns: pubsubOwnerXmlns,
+              children: [
+                XMLNode(
+                  tag: 'configure',
+                  attributes: <String, String>{
+                    'node': node,
+                  },
+                ),
+              ],
+            ),
+          ],
+        ),
+        shouldEncrypt: false,
       ),
-    );
+    ))!;
     if (form.attributes['type'] != 'result') {
       return Result(getPubSubError(form));
     }
 
-    final submit = await attrs.sendStanza(
-      Stanza.iq(
-        type: 'set',
-        to: jid,
-        children: [
-          XMLNode.xmlns(
-            tag: 'pubsub',
-            xmlns: pubsubOwnerXmlns,
-            children: [
-              XMLNode(
-                tag: 'configure',
-                attributes: <String, String>{
-                  'node': node,
-                },
-                children: [
-                  options.toXml(),
-                ],
-              ),
-            ],
-          ),
-        ],
+    final submit = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          to: jid.toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'pubsub',
+              xmlns: pubsubOwnerXmlns,
+              children: [
+                XMLNode(
+                  tag: 'configure',
+                  attributes: <String, String>{
+                    'node': node,
+                  },
+                  children: [
+                    options.toXml(),
+                  ],
+                ),
+              ],
+            ),
+          ],
+        ),
+        shouldEncrypt: false,
       ),
-    );
+    ))!;
     if (submit.attributes['type'] != 'result') {
       return Result(getPubSubError(form));
     }
@@ -543,28 +564,31 @@ class PubSubManager extends XmppManagerBase {
   }
 
   Future<Result<PubSubError, bool>> delete(JID host, String node) async {
-    final request = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'set',
-        to: host.toString(),
-        children: [
-          XMLNode.xmlns(
-            tag: 'pubsub',
-            xmlns: pubsubOwnerXmlns,
-            children: [
-              XMLNode(
-                tag: 'delete',
-                attributes: <String, String>{
-                  'node': node,
-                },
-              ),
-            ],
-          ),
-        ],
+    final request = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          to: host.toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'pubsub',
+              xmlns: pubsubOwnerXmlns,
+              children: [
+                XMLNode(
+                  tag: 'delete',
+                  attributes: <String, String>{
+                    'node': node,
+                  },
+                ),
+              ],
+            ),
+          ],
+        ),
+        shouldEncrypt: false,
       ),
-    ) as Stanza;
+    ))!;
 
-    if (request.type != 'result') {
+    if (request.attributes['type'] != 'result') {
       // TODO(Unknown): Be more specific
       return Result(UnknownPubSubError());
     }
@@ -577,36 +601,39 @@ class PubSubManager extends XmppManagerBase {
     String node,
     String itemId,
   ) async {
-    final request = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'set',
-        to: host.toString(),
-        children: [
-          XMLNode.xmlns(
-            tag: 'pubsub',
-            xmlns: pubsubXmlns,
-            children: [
-              XMLNode(
-                tag: 'retract',
-                attributes: <String, String>{
-                  'node': node,
-                },
-                children: [
-                  XMLNode(
-                    tag: 'item',
-                    attributes: <String, String>{
-                      'id': itemId,
-                    },
-                  ),
-                ],
-              ),
-            ],
-          ),
-        ],
+    final request = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          to: host.toString(),
+          children: [
+            XMLNode.xmlns(
+              tag: 'pubsub',
+              xmlns: pubsubXmlns,
+              children: [
+                XMLNode(
+                  tag: 'retract',
+                  attributes: <String, String>{
+                    'node': node,
+                  },
+                  children: [
+                    XMLNode(
+                      tag: 'item',
+                      attributes: <String, String>{
+                        'id': itemId,
+                      },
+                    ),
+                  ],
+                ),
+              ],
+            ),
+          ],
+        ),
+        shouldEncrypt: false,
       ),
-    ) as Stanza;
+    ))!;
 
-    if (request.type != 'result') {
+    if (request.attributes['type'] != 'result') {
       // TODO(Unknown): Be more specific
       return Result(UnknownPubSubError());
     }

packages/moxxmpp/lib/src/xeps/xep_0066.dart

@@ -2,32 +2,32 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
 /// A data class representing the jabber:x:oob tag.
-class OOBData {
-  const OOBData({this.url, this.desc});
+class OOBData implements StanzaHandlerExtension {
+  const OOBData(this.url, this.desc);
+
+  /// The communicated URL of the OOB data
   final String? url;
+
+  /// The description of the url.
   final String? desc;
-}
 
-XMLNode constructOOBNode(OOBData data) {
-  final children = List<XMLNode>.empty(growable: true);
-
-  if (data.url != null) {
-    children.add(XMLNode(tag: 'url', text: data.url));
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'x',
+      xmlns: oobDataXmlns,
+      children: [
+        if (url != null) XMLNode(tag: 'url', text: url),
+        if (desc != null) XMLNode(tag: 'desc', text: desc),
+      ],
+    );
   }
-  if (data.desc != null) {
-    children.add(XMLNode(tag: 'desc', text: data.desc));
-  }
-
-  return XMLNode.xmlns(
-    tag: 'x',
-    xmlns: oobDataXmlns,
-    children: children,
-  );
 }
 
 class OOBManager extends XmppManagerBase {
@@ -45,7 +45,7 @@ class OOBManager extends XmppManagerBase {
           callback: _onMessage,
           // Before the message manager
           priority: -99,
-        )
+        ),
       ];
 
   @override
@@ -59,11 +59,33 @@ class OOBManager extends XmppManagerBase {
     final url = x.firstTag('url');
     final desc = x.firstTag('desc');
 
-    return state.copyWith(
-      oob: OOBData(
-        url: url?.innerText(),
-        desc: desc?.innerText(),
-      ),
-    );
+    return state
+      ..extensions.set(
+        OOBData(
+          url?.innerText(),
+          desc?.innerText(),
+        ),
+      );
+  }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final data = extensions.get<OOBData>();
+    return data != null
+        ? [
+            data.toXML(),
+          ]
+        : [];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0084.dart

@@ -1,12 +1,11 @@
+import 'dart:convert';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
+import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
-import 'package:moxxmpp/src/xeps/xep_0030/errors.dart';
-import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
-import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
 import 'package:moxxmpp/src/xeps/xep_0060/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0060/xep_0060.dart';
 
@@ -14,10 +13,20 @@ abstract class AvatarError {}
 
 class UnknownAvatarError extends AvatarError {}
 
-class UserAvatar {
-  const UserAvatar({required this.base64, required this.hash});
+/// The result of a successful query of a users avatar.
+class UserAvatarData {
+  const UserAvatarData(this.base64, this.hash);
+
+  /// The base64-encoded avatar data.
   final String base64;
+
+  /// The SHA-1 hash of the raw avatar data.
   final String hash;
+
+  /// The raw avatar data.
+  /// NOTE: Remove newlines because "Line feeds SHOULD NOT be added but MUST be accepted"
+  /// (https://xmpp.org/extensions/xep-0084.html#proto-data).
+  List<int> get data => base64Decode(base64.replaceAll('\n', ''));
 }
 
 class UserAvatarMetadata {
@@ -26,21 +35,40 @@ class UserAvatarMetadata {
     this.length,
     this.width,
     this.height,
-    this.mime,
+    this.type,
+    this.url,
   );
 
-  /// The amount of bytes in the file
+  factory UserAvatarMetadata.fromXML(XMLNode node) {
+    assert(node.tag == 'info', 'node must be an <info /> element');
+
+    final width = node.attributes['width'] as String?;
+    final height = node.attributes['height'] as String?;
+    return UserAvatarMetadata(
+      node.attributes['id']! as String,
+      int.parse(node.attributes['bytes']! as String),
+      width != null ? int.parse(width) : null,
+      height != null ? int.parse(height) : null,
+      node.attributes['type']! as String,
+      node.attributes['url'] as String?,
+    );
+  }
+
+  /// The amount of bytes in the file.
   final int length;
 
-  /// The identifier of the avatar
+  /// The identifier of the avatar.
   final String id;
 
-  /// Image proportions
-  final int width;
-  final int height;
+  /// Image proportions.
+  final int? width;
+  final int? height;
 
-  /// The MIME type of the avatar
-  final String mime;
+  /// The URL where the avatar can be found.
+  final String? url;
+
+  /// The MIME type of the avatar.
+  final String type;
 }
 
 /// NOTE: This class requires a PubSubManager
@@ -50,13 +78,18 @@ class UserAvatarManager extends XmppManagerBase {
   PubSubManager _getPubSubManager() =>
       getAttributes().getManagerById(pubsubManager)! as PubSubManager;
 
+  @override
+  List<String> getDiscoFeatures() => [
+        '$userAvatarMetadataXmlns+notify',
+      ];
+
   @override
   Future<void> onXmppEvent(XmppEvent event) async {
     if (event is PubSubNotificationEvent) {
-      if (event.item.node != userAvatarDataXmlns) return;
+      if (event.item.node != userAvatarMetadataXmlns) return;
 
-      if (event.item.payload.tag != 'data' ||
-          event.item.payload.attributes['xmlns'] != userAvatarDataXmlns) {
+      if (event.item.payload.tag != 'metadata' ||
+          event.item.payload.attributes['xmlns'] != userAvatarMetadataXmlns) {
         logger.warning(
           'Received avatar update from ${event.from} but the payload is invalid. Ignoring...',
         );
@@ -64,10 +97,12 @@ class UserAvatarManager extends XmppManagerBase {
       }
 
       getAttributes().sendEvent(
-        AvatarUpdatedEvent(
-          jid: event.from,
-          base64: event.item.payload.innerText(),
-          hash: event.item.id,
+        UserAvatarUpdatedEvent(
+          JID.fromString(event.from),
+          event.item.payload
+              .findTags('metadata', xmlns: userAvatarMetadataXmlns)
+              .map(UserAvatarMetadata.fromXML)
+              .toList(),
         ),
       );
     }
@@ -79,20 +114,44 @@ class UserAvatarManager extends XmppManagerBase {
 
   /// Requests the avatar from [jid]. Returns the avatar data if the request was
   /// successful. Null otherwise
-  Future<Result<AvatarError, UserAvatar>> getUserAvatar(String jid) async {
+  Future<Result<AvatarError, UserAvatarData>> getUserAvatarData(
+    JID jid,
+    String id,
+  ) async {
     final pubsub = _getPubSubManager();
-    final resultsRaw = await pubsub.getItems(jid, userAvatarDataXmlns);
+    final resultRaw = await pubsub.getItem(jid, userAvatarDataXmlns, id);
+    if (resultRaw.isType<PubSubError>()) return Result(UnknownAvatarError());
+
+    final result = resultRaw.get<PubSubItem>();
+    return Result(
+      UserAvatarData(
+        result.payload.innerText(),
+        id,
+      ),
+    );
+  }
+
+  /// Attempts to fetch the latest item from the User Avatar metadata node. Returns the list of
+  /// metadata contained within it. The list may be empty.
+  ///
+  /// If an error occured, returns an [AvatarError].
+  Future<Result<AvatarError, List<UserAvatarMetadata>>> getLatestMetadata(
+    JID jid,
+  ) async {
+    final resultsRaw = await _getPubSubManager()
+        .getItems(jid, userAvatarMetadataXmlns, maxItems: 1);
     if (resultsRaw.isType<PubSubError>()) return Result(UnknownAvatarError());
 
     final results = resultsRaw.get<List<PubSubItem>>();
-    if (results.isEmpty) return Result(UnknownAvatarError());
+    if (results.isEmpty) {
+      return Result(UnknownAvatarError());
+    }
 
-    final item = results[0];
     return Result(
-      UserAvatar(
-        base64: item.payload.innerText(),
-        hash: item.id,
-      ),
+      results.first.payload
+          .findTags('info')
+          .map(UserAvatarMetadata.fromXML)
+          .toList(),
     );
   }
 
@@ -106,7 +165,7 @@ class UserAvatarManager extends XmppManagerBase {
   ) async {
     final pubsub = _getPubSubManager();
     final result = await pubsub.publish(
-      getAttributes().getFullJID().toBare().toString(),
+      getAttributes().getFullJID().toBare(),
       userAvatarDataXmlns,
       XMLNode.xmlns(
         tag: 'data',
@@ -133,7 +192,7 @@ class UserAvatarManager extends XmppManagerBase {
   ) async {
     final pubsub = _getPubSubManager();
     final result = await pubsub.publish(
-      getAttributes().getFullJID().toBare().toString(),
+      getAttributes().getFullJID().toBare(),
       userAvatarMetadataXmlns,
       XMLNode.xmlns(
         tag: 'metadata',
@@ -145,7 +204,7 @@ class UserAvatarManager extends XmppManagerBase {
               'bytes': metadata.length.toString(),
               'height': metadata.height.toString(),
               'width': metadata.width.toString(),
-              'type': metadata.mime,
+              'type': metadata.type,
               'id': metadata.id,
             },
           ),
@@ -162,34 +221,16 @@ class UserAvatarManager extends XmppManagerBase {
   }
 
   /// Subscribe the data and metadata node of [jid].
-  Future<Result<AvatarError, bool>> subscribe(String jid) async {
+  Future<Result<AvatarError, bool>> subscribe(JID jid) async {
     await _getPubSubManager().subscribe(jid, userAvatarMetadataXmlns);
 
     return const Result(true);
   }
 
   /// Unsubscribe the data and metadata node of [jid].
-  Future<Result<AvatarError, bool>> unsubscribe(String jid) async {
+  Future<Result<AvatarError, bool>> unsubscribe(JID jid) async {
     await _getPubSubManager().subscribe(jid, userAvatarMetadataXmlns);
 
     return const Result(true);
   }
-
-  /// Returns the PubSub Id of an avatar after doing a disco#items query.
-  /// Note that this assumes that there is only one (1) item published on
-  /// the node.
-  Future<Result<AvatarError, String>> getAvatarId(String jid) async {
-    final disco = getAttributes().getManagerById(discoManager)! as DiscoManager;
-    final response = await disco.discoItemsQuery(
-      jid,
-      node: userAvatarDataXmlns,
-      shouldEncrypt: false,
-    );
-    if (response.isType<DiscoError>()) return Result(UnknownAvatarError());
-
-    final items = response.get<List<DiscoItem>>();
-    if (items.isEmpty) return Result(UnknownAvatarError());
-
-    return Result(items.first.name);
-  }
 }

packages/moxxmpp/lib/src/xeps/xep_0085.dart

@@ -2,43 +2,59 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
-enum ChatState { active, composing, paused, inactive, gone }
+enum ChatState implements StanzaHandlerExtension {
+  active,
+  composing,
+  paused,
+  inactive,
+  gone;
 
-ChatState chatStateFromString(String raw) {
-  switch (raw) {
-    case 'active':
-      {
+  factory ChatState.fromName(String state) {
+    switch (state) {
+      case 'active':
         return ChatState.active;
-      }
-    case 'composing':
-      {
+      case 'composing':
         return ChatState.composing;
-      }
-    case 'paused':
-      {
+      case 'paused':
         return ChatState.paused;
-      }
-    case 'inactive':
-      {
+      case 'inactive':
         return ChatState.inactive;
-      }
-    case 'gone':
-      {
+      case 'gone':
         return ChatState.gone;
-      }
-    default:
-      {
-        return ChatState.gone;
-      }
+    }
+
+    throw Exception('Invalid chat state $state');
+  }
+
+  String toName() {
+    switch (this) {
+      case ChatState.active:
+        return 'active';
+      case ChatState.composing:
+        return 'composing';
+      case ChatState.paused:
+        return 'paused';
+      case ChatState.inactive:
+        return 'inactive';
+      case ChatState.gone:
+        return 'gone';
+    }
+  }
+
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: toName(),
+      xmlns: chatStateXmlns,
+    );
   }
 }
 
-String chatStateToString(ChatState state) => state.toString().split('.').last;
-
 class ChatStateManager extends XmppManagerBase {
   ChatStateManager() : super(chatStateManager);
 
@@ -53,7 +69,7 @@ class ChatStateManager extends XmppManagerBase {
           callback: _onChatStateReceived,
           // Before the message handler
           priority: -99,
-        )
+        ),
       ];
 
   @override
@@ -64,58 +80,55 @@ class ChatStateManager extends XmppManagerBase {
     StanzaHandlerData state,
   ) async {
     final element = state.stanza.firstTagByXmlns(chatStateXmlns)!;
-    ChatState? chatState;
 
-    switch (element.tag) {
-      case 'active':
-        {
-          chatState = ChatState.active;
-        }
-        break;
-      case 'composing':
-        {
-          chatState = ChatState.composing;
-        }
-        break;
-      case 'paused':
-        {
-          chatState = ChatState.paused;
-        }
-        break;
-      case 'inactive':
-        {
-          chatState = ChatState.inactive;
-        }
-        break;
-      case 'gone':
-        {
-          chatState = ChatState.gone;
-        }
-        break;
-      default:
-        {
-          logger.warning("Received invalid chat state '${element.tag}'");
-        }
+    try {
+      state.extensions.set(ChatState.fromName(element.tag));
+    } catch (_) {
+      logger.finest('Ignoring invalid chat state ${element.tag}');
     }
 
-    return state.copyWith(chatState: chatState);
+    return state;
   }
 
   /// Send a chat state notification to [to]. You can specify the type attribute
   /// of the message with [messageType].
-  void sendChatState(
+  Future<void> sendChatState(
     ChatState state,
     String to, {
     String messageType = 'chat',
-  }) {
-    final tagName = state.toString().split('.').last;
-
-    getAttributes().sendStanza(
-      Stanza.message(
-        to: to,
-        type: messageType,
-        children: [XMLNode.xmlns(tag: tagName, xmlns: chatStateXmlns)],
+  }) async {
+    await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.message(
+          to: to,
+          type: messageType,
+          children: [
+            state.toXML(),
+          ],
+        ),
+        awaitable: false,
       ),
     );
   }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final data = extensions.get<ChatState>();
+    return data != null
+        ? [
+            data.toXML(),
+          ]
+        : [];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
+  }
 }

packages/moxxmpp/lib/src/xeps/xep_0115.dart

@@ -1,37 +1,37 @@
+import 'dart:async';
 import 'dart:convert';
-import 'package:cryptography/cryptography.dart';
 import 'package:meta/meta.dart';
+import 'package:moxxmpp/src/events.dart';
+import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
+import 'package:moxxmpp/src/managers/data.dart';
+import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/presence.dart';
 import 'package:moxxmpp/src/rfcs/rfc_4790.dart';
+import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/list.dart';
+import 'package:moxxmpp/src/xeps/xep_0004.dart';
+import 'package:moxxmpp/src/xeps/xep_0030/cache.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
-import 'package:moxxmpp/src/xeps/xep_0414.dart';
+import 'package:moxxmpp/src/xeps/xep_0300.dart';
+import 'package:synchronized/synchronized.dart';
 
-@immutable
-class CapabilityHashInfo {
-  const CapabilityHashInfo(this.ver, this.node, this.hash);
-  final String ver;
-  final String node;
-  final String hash;
-}
+/// Given an identity [i], compute the string according to XEP-0115 § 5.1 step 2.
+String _identityString(Identity i) =>
+    '${i.category}/${i.type}/${i.lang ?? ""}/${i.name ?? ""}';
 
 /// Calculates the Entitiy Capability hash according to XEP-0115 based on the
 /// disco information.
 Future<String> calculateCapabilityHash(
+  HashFunction algorithm,
   DiscoInfo info,
-  HashAlgorithm algorithm,
 ) async {
   final buffer = StringBuffer();
-  final identitiesSorted = info.identities
-      .map(
-        (Identity i) =>
-            '${i.category}/${i.type}/${i.lang ?? ""}/${i.name ?? ""}',
-      )
-      .toList();
+  final identitiesSorted = info.identities.map(_identityString).toList();
   // ignore: cascade_invocations
   identitiesSorted.sort(ioctetSortComparator);
   buffer.write('${identitiesSorted.join("<")}<');
@@ -72,8 +72,11 @@ Future<String> calculateCapabilityHash(
     }
   }
 
-  return base64
-      .encode((await algorithm.hash(utf8.encode(buffer.toString()))).bytes);
+  final rawHash = await CryptographicHashManager.hashFromData(
+    algorithm,
+    utf8.encode(buffer.toString()),
+  );
+  return base64.encode(rawHash);
 }
 
 /// A manager implementing the advertising of XEP-0115. It responds to the
@@ -91,20 +94,42 @@ class EntityCapabilitiesManager extends XmppManagerBase {
   /// The cached capability hash.
   String? _capabilityHash;
 
+  /// Cache the mapping between the full JID and the capability hash string.
+  final Map<String, String> _jidToCapHashCache = {};
+
+  /// Cache the mapping between capability hash string and the resulting disco#info.
+  final Map<String, DiscoInfo> _capHashCache = {};
+
+  /// A lock guarding access to the capability hash cache.
+  final Lock _cacheLock = Lock();
+
   @override
   Future<bool> isSupported() async => true;
 
   @override
-  List<String> getDiscoFeatures() => [capsXmlns];
+  List<String> getDiscoFeatures() => [
+        capsXmlns,
+      ];
+
+  @override
+  List<StanzaHandler> getIncomingStanzaHandlers() => [
+        StanzaHandler(
+          stanzaTag: 'presence',
+          tagName: 'c',
+          tagXmlns: capsXmlns,
+          callback: onPresence,
+          priority: PresenceManager.presenceHandlerPriority + 1,
+        ),
+      ];
 
   /// Computes, if required, the capability hash of the data provided by
   /// the DiscoManager.
   Future<String> getCapabilityHash() async {
     _capabilityHash ??= await calculateCapabilityHash(
+      HashFunction.sha1,
       getAttributes()
           .getManagerById<DiscoManager>(discoManager)!
           .getDiscoInfo(null),
-      getHashByName('sha-1')!,
     );
 
     return _capabilityHash!;
@@ -135,20 +160,220 @@ class EntityCapabilitiesManager extends XmppManagerBase {
     ];
   }
 
+  /// If we know of [jid]'s capability hash, look up the [DiscoInfo] associated with
+  /// that capability hash. If we don't know of [jid]'s capability hash, return null.
+  Future<DiscoInfo?> getCachedDiscoInfoFromJid(JID jid) async {
+    return _cacheLock.synchronized(() {
+      final capHash = _jidToCapHashCache[jid.toString()];
+      if (capHash == null) {
+        return null;
+      }
+
+      return _capHashCache[capHash];
+    });
+  }
+
+  Future<void> _performQuery(
+    Stanza presence,
+    String ver,
+    String hashFunctionName,
+    String capabilityNode,
+    JID from,
+  ) async {
+    final dm = getAttributes().getManagerById<DiscoManager>(discoManager)!;
+    final discoRequest = await dm.discoInfoQuery(
+      from,
+      node: capabilityNode,
+    );
+    if (discoRequest.isType<StanzaError>()) {
+      return;
+    }
+    final discoInfo = discoRequest.get<DiscoInfo>();
+
+    final hashFunction = HashFunction.maybeFromName(hashFunctionName);
+    if (hashFunction == null) {
+      await dm.addCachedDiscoInfo(
+        MapEntry<DiscoCacheKey, DiscoInfo>(
+          DiscoCacheKey(
+            from,
+            null,
+          ),
+          discoInfo,
+        ),
+      );
+      return;
+    }
+
+    // Validate the disco#info result according to XEP-0115 § 5.4
+    // > If the response includes more than one service discovery identity with the
+    // > same category/type/lang/name, consider the entire response to be ill-formed.
+    for (final identity in discoInfo.identities) {
+      final identityString = _identityString(identity);
+      if (discoInfo.identities
+              .count((i) => _identityString(i) == identityString) >
+          1) {
+        logger.warning(
+          'Malformed disco#info response: More than one equal identity',
+        );
+        return;
+      }
+    }
+
+    // > If the response includes more than one service discovery feature with the same
+    // > XML character data, consider the entire response to be ill-formed.
+    for (final feature in discoInfo.features) {
+      if (discoInfo.features.count((f) => f == feature) > 1) {
+        logger.warning(
+          'Malformed disco#info response: More than one equal feature',
+        );
+        return;
+      }
+    }
+
+    // > If the response includes more than one extended service discovery information
+    // > form with the same FORM_TYPE or the FORM_TYPE field contains more than one
+    // > <value/> element with different XML character data, consider the entire response
+    // > to be ill-formed.
+    // >
+    // > If the response includes an extended service discovery information form where
+    // > the FORM_TYPE field is not of type "hidden" or the form does not include a
+    // > FORM_TYPE field, ignore the form but continue processing.
+    final validExtendedInfoItems = List<DataForm>.empty(growable: true);
+    for (final extendedInfo in discoInfo.extendedInfo) {
+      final formType = extendedInfo.getFieldByVar('FORM_TYPE');
+
+      // Form should have a FORM_TYPE field
+      if (formType == null) {
+        logger.fine('Skipping extended info as it contains no FORM_TYPE field');
+        continue;
+      }
+
+      // Check if we only have one unique FORM_TYPE value
+      if (formType.values.length > 1) {
+        if (Set<String>.from(formType.values).length > 1) {
+          logger.warning(
+            'Malformed disco#info response: Extended Info FORM_TYPE contains more than one value(s) of different value.',
+          );
+          return;
+        }
+      }
+
+      // Check if we have more than one extended info forms of the same type
+      final sameFormTypeFormsNumber = discoInfo.extendedInfo.count((form) {
+        final type = form.getFieldByVar('FORM_TYPE')?.values.first;
+        if (type == null) return false;
+
+        return type == formType.values.first;
+      });
+      if (sameFormTypeFormsNumber > 1) {
+        logger.warning(
+          'Malformed disco#info response: More than one Extended Disco Info forms with the same FORM_TYPE value',
+        );
+        return;
+      }
+
+      // Check if the field type is hidden
+      if (formType.type != 'hidden') {
+        logger.fine(
+          'Skipping extended info as the FORM_TYPE field is not of type "hidden"',
+        );
+        continue;
+      }
+
+      validExtendedInfoItems.add(extendedInfo);
+    }
+
+    // Validate the capability hash
+    final newDiscoInfo = DiscoInfo(
+      discoInfo.features,
+      discoInfo.identities,
+      validExtendedInfoItems,
+      discoInfo.node,
+      discoInfo.jid,
+    );
+    final computedCapabilityHash = await calculateCapabilityHash(
+      hashFunction,
+      newDiscoInfo,
+    );
+
+    if (computedCapabilityHash == ver) {
+      await _cacheLock.synchronized(() {
+        _jidToCapHashCache[from.toString()] = ver;
+        _capHashCache[ver] = newDiscoInfo;
+      });
+    } else {
+      logger.warning(
+        'Capability hash mismatch from $from: Received "$ver", expected "$computedCapabilityHash".',
+      );
+    }
+  }
+
+  @visibleForTesting
+  Future<StanzaHandlerData> onPresence(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
+    if (stanza.from == null) {
+      return state;
+    }
+
+    final from = JID.fromString(stanza.from!);
+    final c = stanza.firstTag('c', xmlns: capsXmlns)!;
+
+    final hashFunctionName = c.attributes['hash'] as String?;
+    final capabilityNode = c.attributes['node'] as String?;
+    final ver = c.attributes['ver'] as String?;
+    if (hashFunctionName == null || capabilityNode == null || ver == null) {
+      return state;
+    }
+
+    // Check if we know of the hash
+    final isCached =
+        await _cacheLock.synchronized(() => _capHashCache.containsKey(ver));
+    if (isCached) {
+      return state;
+    }
+
+    unawaited(
+      _performQuery(
+        stanza,
+        ver,
+        hashFunctionName,
+        capabilityNode,
+        from,
+      ),
+    );
+    return state;
+  }
+
+  @visibleForTesting
+  void injectIntoCache(JID jid, String ver, DiscoInfo info) {
+    _jidToCapHashCache[jid.toString()] = ver;
+    _capHashCache[ver] = info;
+  }
+
+  @override
+  Future<void> onXmppEvent(XmppEvent event) async {
+    if (event is StreamNegotiationsDoneEvent) {
+      // Clear the JID to cap. hash mapping.
+      await _cacheLock.synchronized(_jidToCapHashCache.clear);
+    }
+  }
+
   @override
   Future<void> postRegisterCallback() async {
     await super.postRegisterCallback();
 
     getAttributes()
-        .getManagerById<DiscoManager>(discoManager)!
-        .registerInfoCallback(
+        .getManagerById<DiscoManager>(discoManager)
+        ?.registerInfoCallback(
           await _getNode(),
           _onInfoQuery,
         );
 
     getAttributes()
-        .getManagerById<PresenceManager>(presenceManager)!
-        .registerPreSendCallback(
+        .getManagerById<PresenceManager>(presenceManager)
+        ?.registerPreSendCallback(
           _prePresenceSent,
         );
   }

packages/moxxmpp/lib/src/xeps/xep_0184.dart

@@ -4,23 +4,43 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
-XMLNode makeMessageDeliveryRequest() {
-  return XMLNode.xmlns(
-    tag: 'request',
-    xmlns: deliveryXmlns,
-  );
+class MessageDeliveryReceiptData implements StanzaHandlerExtension {
+  const MessageDeliveryReceiptData(this.receiptRequested);
+
+  /// Indicates whether a delivery receipt is requested or not.
+  final bool receiptRequested;
+
+  XMLNode toXML() {
+    assert(
+      receiptRequested,
+      'This method makes little sense with receiptRequested == false',
+    );
+    return XMLNode.xmlns(
+      tag: 'request',
+      xmlns: deliveryXmlns,
+    );
+  }
 }
 
-XMLNode makeMessageDeliveryResponse(String id) {
-  return XMLNode.xmlns(
-    tag: 'received',
-    xmlns: deliveryXmlns,
-    attributes: {'id': id},
-  );
+class MessageDeliveryReceivedData implements StanzaHandlerExtension {
+  const MessageDeliveryReceivedData(this.id);
+
+  /// The stanza id of the message we received.
+  final String id;
+
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'received',
+      xmlns: deliveryXmlns,
+      attributes: {'id': id},
+    );
+  }
 }
 
 class MessageDeliveryReceiptManager extends XmppManagerBase {
@@ -46,7 +66,7 @@ class MessageDeliveryReceiptManager extends XmppManagerBase {
           callback: _onDeliveryRequestReceived,
           // Before the message handler
           priority: -99,
-        )
+        ),
       ];
 
   @override
@@ -56,7 +76,7 @@ class MessageDeliveryReceiptManager extends XmppManagerBase {
     Stanza message,
     StanzaHandlerData state,
   ) async {
-    return state.copyWith(deliveryReceiptRequested: true);
+    return state..extensions.set(const MessageDeliveryReceiptData(true));
   }
 
   Future<StanzaHandlerData> _onDeliveryReceiptReceived(
@@ -64,16 +84,16 @@ class MessageDeliveryReceiptManager extends XmppManagerBase {
     StanzaHandlerData state,
   ) async {
     final received = message.firstTag('received', xmlns: deliveryXmlns)!;
-    for (final item in message.children) {
-      if (!['origin-id', 'stanza-id', 'delay', 'store', 'received']
-          .contains(item.tag)) {
-        logger.info(
-          "Won't handle stanza as delivery receipt because we found an '${item.tag}' element",
-        );
+    // for (final item in message.children) {
+    //   if (!['origin-id', 'stanza-id', 'delay', 'store', 'received']
+    //       .contains(item.tag)) {
+    //     logger.info(
+    //       "Won't handle stanza as delivery receipt because we found an '${item.tag}' element",
+    //     );
 
-        return state.copyWith(done: true);
-      }
-    }
+    //     return state.copyWith(done: true);
+    //   }
+    // }
 
     getAttributes().sendEvent(
       DeliveryReceiptReceivedEvent(
@@ -81,6 +101,27 @@ class MessageDeliveryReceiptManager extends XmppManagerBase {
         id: received.attributes['id']! as String,
       ),
     );
-    return state.copyWith(done: true);
+    return state..done = true;
+  }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final data = extensions.get<MessageDeliveryReceivedData>();
+    return data != null
+        ? [
+            data.toXML(),
+          ]
+        : [];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0191.dart

@@ -27,7 +27,7 @@ class BlockingManager extends XmppManagerBase {
           tagName: 'block',
           tagXmlns: blockingXmlns,
           callback: _blockPush,
-        )
+        ),
       ];
 
   @override
@@ -70,7 +70,7 @@ class BlockingManager extends XmppManagerBase {
       ),
     );
 
-    return state.copyWith(done: true);
+    return state..done = true;
   }
 
   Future<StanzaHandlerData> _unblockPush(
@@ -92,43 +92,49 @@ class BlockingManager extends XmppManagerBase {
       );
     }
 
-    return state.copyWith(done: true);
+    return state..done = true;
   }
 
   Future<bool> block(List<String> items) async {
-    final result = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'set',
-        children: [
-          XMLNode.xmlns(
-            tag: 'block',
-            xmlns: blockingXmlns,
-            children: items.map((item) {
-              return XMLNode(
-                tag: 'item',
-                attributes: <String, String>{'jid': item},
-              );
-            }).toList(),
-          )
-        ],
+    final result = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          children: [
+            XMLNode.xmlns(
+              tag: 'block',
+              xmlns: blockingXmlns,
+              children: items.map((item) {
+                return XMLNode(
+                  tag: 'item',
+                  attributes: {
+                    'jid': item,
+                  },
+                );
+              }).toList(),
+            ),
+          ],
+        ),
       ),
-    );
+    ))!;
 
     return result.attributes['type'] == 'result';
   }
 
   Future<bool> unblockAll() async {
-    final result = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'set',
-        children: [
-          XMLNode.xmlns(
-            tag: 'unblock',
-            xmlns: blockingXmlns,
-          )
-        ],
+    final result = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          children: [
+            XMLNode.xmlns(
+              tag: 'unblock',
+              xmlns: blockingXmlns,
+            ),
+          ],
+        ),
       ),
-    );
+    ))!;
 
     return result.attributes['type'] == 'result';
   }
@@ -136,41 +142,47 @@ class BlockingManager extends XmppManagerBase {
   Future<bool> unblock(List<String> items) async {
     assert(items.isNotEmpty, 'The list of items to unblock must be non-empty');
 
-    final result = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'set',
-        children: [
-          XMLNode.xmlns(
-            tag: 'unblock',
-            xmlns: blockingXmlns,
-            children: items
-                .map(
-                  (item) => XMLNode(
-                    tag: 'item',
-                    attributes: <String, String>{'jid': item},
-                  ),
-                )
-                .toList(),
-          )
-        ],
+    final result = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          children: [
+            XMLNode.xmlns(
+              tag: 'unblock',
+              xmlns: blockingXmlns,
+              children: items
+                  .map(
+                    (item) => XMLNode(
+                      tag: 'item',
+                      attributes: {
+                        'jid': item,
+                      },
+                    ),
+                  )
+                  .toList(),
+            ),
+          ],
+        ),
       ),
-    );
+    ))!;
 
     return result.attributes['type'] == 'result';
   }
 
   Future<List<String>> getBlocklist() async {
-    final result = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'get',
-        children: [
-          XMLNode.xmlns(
-            tag: 'blocklist',
-            xmlns: blockingXmlns,
-          )
-        ],
+    final result = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'get',
+          children: [
+            XMLNode.xmlns(
+              tag: 'blocklist',
+              xmlns: blockingXmlns,
+            ),
+          ],
+        ),
       ),
-    );
+    ))!;
 
     final blocklist = result.firstTag('blocklist', xmlns: blockingXmlns)!;
     return blocklist

packages/moxxmpp/lib/src/xeps/xep_0198/negotiator.dart

@@ -1,12 +1,12 @@
 import 'package:collection/collection.dart';
 import 'package:logging/logging.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/nonzas.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/state.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/xep_0198.dart';
@@ -113,7 +113,7 @@ class StreamManagementNegotiator extends Sasl2FeatureNegotiator
     // We have to do this because we otherwise get a stanza stuck in the queue,
     // thus spamming the server on every <a /> nonza we receive.
     // ignore: cascade_invocations
-    await sm.setState(StreamManagementState(0, 0));
+    await sm.setState(const StreamManagementState(0, 0));
     await sm.commitState();
 
     _resumeFailed = true;

packages/moxxmpp/lib/src/xeps/xep_0198/nonzas.dart

@@ -5,7 +5,10 @@ class StreamManagementEnableNonza extends XMLNode {
   StreamManagementEnableNonza()
       : super(
           tag: 'enable',
-          attributes: <String, String>{'xmlns': smXmlns, 'resume': 'true'},
+          attributes: {
+            'xmlns': smXmlns,
+            'resume': 'true',
+          },
         );
 }
 
@@ -13,10 +16,10 @@ class StreamManagementResumeNonza extends XMLNode {
   StreamManagementResumeNonza(String id, int h)
       : super(
           tag: 'resume',
-          attributes: <String, String>{
+          attributes: {
             'xmlns': smXmlns,
             'previd': id,
-            'h': h.toString()
+            'h': h.toString(),
           },
         );
 }
@@ -25,7 +28,10 @@ class StreamManagementAckNonza extends XMLNode {
   StreamManagementAckNonza(int h)
       : super(
           tag: 'a',
-          attributes: <String, String>{'xmlns': smXmlns, 'h': h.toString()},
+          attributes: {
+            'xmlns': smXmlns,
+            'h': h.toString(),
+          },
         );
 }
 
@@ -33,7 +39,7 @@ class StreamManagementRequestNonza extends XMLNode {
   StreamManagementRequestNonza()
       : super(
           tag: 'r',
-          attributes: <String, String>{
+          attributes: {
             'xmlns': smXmlns,
           },
         );

packages/moxxmpp/lib/src/xeps/xep_0198/state.dart

@@ -1,18 +1,43 @@
-import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:meta/meta.dart';
 
-part 'state.freezed.dart';
-part 'state.g.dart';
+const _smNotSpecified = Object();
 
-@freezed
-class StreamManagementState with _$StreamManagementState {
-  factory StreamManagementState(
-    int c2s,
-    int s2c, {
-    String? streamResumptionLocation,
-    String? streamResumptionId,
-  }) = _StreamManagementState;
+@immutable
+class StreamManagementState {
+  const StreamManagementState(
+    this.c2s,
+    this.s2c, {
+    this.streamResumptionLocation,
+    this.streamResumptionId,
+  });
 
-  // JSON
-  factory StreamManagementState.fromJson(Map<String, dynamic> json) =>
-      _$StreamManagementStateFromJson(json);
+  /// The counter of stanzas sent from the client to the server.
+  final int c2s;
+
+  /// The counter of stanzas sent from the server to the client.
+  final int s2c;
+
+  /// If set, the server's preferred location for resumption.
+  final String? streamResumptionLocation;
+
+  /// If set, the token to allow using stream resumption.
+  final String? streamResumptionId;
+
+  StreamManagementState copyWith({
+    Object c2s = _smNotSpecified,
+    Object s2c = _smNotSpecified,
+    Object? streamResumptionLocation = _smNotSpecified,
+    Object? streamResumptionId = _smNotSpecified,
+  }) {
+    return StreamManagementState(
+      c2s != _smNotSpecified ? c2s as int : this.c2s,
+      s2c != _smNotSpecified ? s2c as int : this.s2c,
+      streamResumptionLocation: streamResumptionLocation != _smNotSpecified
+          ? streamResumptionLocation as String?
+          : this.streamResumptionLocation,
+      streamResumptionId: streamResumptionId != _smNotSpecified
+          ? streamResumptionId as String?
+          : this.streamResumptionId,
+    );
+  }
 }

packages/moxxmpp/lib/src/xeps/xep_0198/state.freezed.dart

@@ -1,217 +0,0 @@
-// coverage:ignore-file
-// GENERATED CODE - DO NOT MODIFY BY HAND
-// ignore_for_file: type=lint
-// ignore_for_file: unused_element, deprecated_member_use, deprecated_member_use_from_same_package, use_function_type_syntax_for_parameters, unnecessary_const, avoid_init_to_null, invalid_override_different_default_values_named, prefer_expression_function_bodies, annotate_overrides, invalid_annotation_target
-
-part of 'state.dart';
-
-// **************************************************************************
-// FreezedGenerator
-// **************************************************************************
-
-T _$identity<T>(T value) => value;
-
-final _privateConstructorUsedError = UnsupportedError(
-    'It seems like you constructed your class using `MyClass._()`. This constructor is only meant to be used by freezed and you are not supposed to need it nor use it.\nPlease check the documentation here for more information: https://github.com/rrousselGit/freezed#custom-getters-and-methods');
-
-StreamManagementState _$StreamManagementStateFromJson(
-    Map<String, dynamic> json) {
-  return _StreamManagementState.fromJson(json);
-}
-
-/// @nodoc
-mixin _$StreamManagementState {
-  int get c2s => throw _privateConstructorUsedError;
-  int get s2c => throw _privateConstructorUsedError;
-  String? get streamResumptionLocation => throw _privateConstructorUsedError;
-  String? get streamResumptionId => throw _privateConstructorUsedError;
-
-  Map<String, dynamic> toJson() => throw _privateConstructorUsedError;
-  @JsonKey(ignore: true)
-  $StreamManagementStateCopyWith<StreamManagementState> get copyWith =>
-      throw _privateConstructorUsedError;
-}
-
-/// @nodoc
-abstract class $StreamManagementStateCopyWith<$Res> {
-  factory $StreamManagementStateCopyWith(StreamManagementState value,
-          $Res Function(StreamManagementState) then) =
-      _$StreamManagementStateCopyWithImpl<$Res>;
-  $Res call(
-      {int c2s,
-      int s2c,
-      String? streamResumptionLocation,
-      String? streamResumptionId});
-}
-
-/// @nodoc
-class _$StreamManagementStateCopyWithImpl<$Res>
-    implements $StreamManagementStateCopyWith<$Res> {
-  _$StreamManagementStateCopyWithImpl(this._value, this._then);
-
-  final StreamManagementState _value;
-  // ignore: unused_field
-  final $Res Function(StreamManagementState) _then;
-
-  @override
-  $Res call({
-    Object? c2s = freezed,
-    Object? s2c = freezed,
-    Object? streamResumptionLocation = freezed,
-    Object? streamResumptionId = freezed,
-  }) {
-    return _then(_value.copyWith(
-      c2s: c2s == freezed
-          ? _value.c2s
-          : c2s // ignore: cast_nullable_to_non_nullable
-              as int,
-      s2c: s2c == freezed
-          ? _value.s2c
-          : s2c // ignore: cast_nullable_to_non_nullable
-              as int,
-      streamResumptionLocation: streamResumptionLocation == freezed
-          ? _value.streamResumptionLocation
-          : streamResumptionLocation // ignore: cast_nullable_to_non_nullable
-              as String?,
-      streamResumptionId: streamResumptionId == freezed
-          ? _value.streamResumptionId
-          : streamResumptionId // ignore: cast_nullable_to_non_nullable
-              as String?,
-    ));
-  }
-}
-
-/// @nodoc
-abstract class _$$_StreamManagementStateCopyWith<$Res>
-    implements $StreamManagementStateCopyWith<$Res> {
-  factory _$$_StreamManagementStateCopyWith(_$_StreamManagementState value,
-          $Res Function(_$_StreamManagementState) then) =
-      __$$_StreamManagementStateCopyWithImpl<$Res>;
-  @override
-  $Res call(
-      {int c2s,
-      int s2c,
-      String? streamResumptionLocation,
-      String? streamResumptionId});
-}
-
-/// @nodoc
-class __$$_StreamManagementStateCopyWithImpl<$Res>
-    extends _$StreamManagementStateCopyWithImpl<$Res>
-    implements _$$_StreamManagementStateCopyWith<$Res> {
-  __$$_StreamManagementStateCopyWithImpl(_$_StreamManagementState _value,
-      $Res Function(_$_StreamManagementState) _then)
-      : super(_value, (v) => _then(v as _$_StreamManagementState));
-
-  @override
-  _$_StreamManagementState get _value =>
-      super._value as _$_StreamManagementState;
-
-  @override
-  $Res call({
-    Object? c2s = freezed,
-    Object? s2c = freezed,
-    Object? streamResumptionLocation = freezed,
-    Object? streamResumptionId = freezed,
-  }) {
-    return _then(_$_StreamManagementState(
-      c2s == freezed
-          ? _value.c2s
-          : c2s // ignore: cast_nullable_to_non_nullable
-              as int,
-      s2c == freezed
-          ? _value.s2c
-          : s2c // ignore: cast_nullable_to_non_nullable
-              as int,
-      streamResumptionLocation: streamResumptionLocation == freezed
-          ? _value.streamResumptionLocation
-          : streamResumptionLocation // ignore: cast_nullable_to_non_nullable
-              as String?,
-      streamResumptionId: streamResumptionId == freezed
-          ? _value.streamResumptionId
-          : streamResumptionId // ignore: cast_nullable_to_non_nullable
-              as String?,
-    ));
-  }
-}
-
-/// @nodoc
-@JsonSerializable()
-class _$_StreamManagementState implements _StreamManagementState {
-  _$_StreamManagementState(this.c2s, this.s2c,
-      {this.streamResumptionLocation, this.streamResumptionId});
-
-  factory _$_StreamManagementState.fromJson(Map<String, dynamic> json) =>
-      _$$_StreamManagementStateFromJson(json);
-
-  @override
-  final int c2s;
-  @override
-  final int s2c;
-  @override
-  final String? streamResumptionLocation;
-  @override
-  final String? streamResumptionId;
-
-  @override
-  String toString() {
-    return 'StreamManagementState(c2s: $c2s, s2c: $s2c, streamResumptionLocation: $streamResumptionLocation, streamResumptionId: $streamResumptionId)';
-  }
-
-  @override
-  bool operator ==(dynamic other) {
-    return identical(this, other) ||
-        (other.runtimeType == runtimeType &&
-            other is _$_StreamManagementState &&
-            const DeepCollectionEquality().equals(other.c2s, c2s) &&
-            const DeepCollectionEquality().equals(other.s2c, s2c) &&
-            const DeepCollectionEquality().equals(
-                other.streamResumptionLocation, streamResumptionLocation) &&
-            const DeepCollectionEquality()
-                .equals(other.streamResumptionId, streamResumptionId));
-  }
-
-  @JsonKey(ignore: true)
-  @override
-  int get hashCode => Object.hash(
-      runtimeType,
-      const DeepCollectionEquality().hash(c2s),
-      const DeepCollectionEquality().hash(s2c),
-      const DeepCollectionEquality().hash(streamResumptionLocation),
-      const DeepCollectionEquality().hash(streamResumptionId));
-
-  @JsonKey(ignore: true)
-  @override
-  _$$_StreamManagementStateCopyWith<_$_StreamManagementState> get copyWith =>
-      __$$_StreamManagementStateCopyWithImpl<_$_StreamManagementState>(
-          this, _$identity);
-
-  @override
-  Map<String, dynamic> toJson() {
-    return _$$_StreamManagementStateToJson(
-      this,
-    );
-  }
-}
-
-abstract class _StreamManagementState implements StreamManagementState {
-  factory _StreamManagementState(final int c2s, final int s2c,
-      {final String? streamResumptionLocation,
-      final String? streamResumptionId}) = _$_StreamManagementState;
-
-  factory _StreamManagementState.fromJson(Map<String, dynamic> json) =
-      _$_StreamManagementState.fromJson;
-
-  @override
-  int get c2s;
-  @override
-  int get s2c;
-  @override
-  String? get streamResumptionLocation;
-  @override
-  String? get streamResumptionId;
-  @override
-  @JsonKey(ignore: true)
-  _$$_StreamManagementStateCopyWith<_$_StreamManagementState> get copyWith =>
-      throw _privateConstructorUsedError;
-}

packages/moxxmpp/lib/src/xeps/xep_0198/state.g.dart

@@ -1,25 +0,0 @@
-// GENERATED CODE - DO NOT MODIFY BY HAND
-
-part of 'state.dart';
-
-// **************************************************************************
-// JsonSerializableGenerator
-// **************************************************************************
-
-_$_StreamManagementState _$$_StreamManagementStateFromJson(
-        Map<String, dynamic> json) =>
-    _$_StreamManagementState(
-      json['c2s'] as int,
-      json['s2c'] as int,
-      streamResumptionLocation: json['streamResumptionLocation'] as String?,
-      streamResumptionId: json['streamResumptionId'] as String?,
-    );
-
-Map<String, dynamic> _$$_StreamManagementStateToJson(
-        _$_StreamManagementState instance) =>
-    <String, dynamic>{
-      'c2s': instance.c2s,
-      's2c': instance.s2c,
-      'streamResumptionLocation': instance.streamResumptionLocation,
-      'streamResumptionId': instance.streamResumptionId,
-    };

packages/moxxmpp/lib/src/xeps/xep_0198/types.dart

@@ -0,0 +1,39 @@
+import 'package:meta/meta.dart';
+import 'package:moxxmpp/src/managers/data.dart';
+import 'package:moxxmpp/src/stanza.dart';
+
+class StreamManagementData implements StanzaHandlerExtension {
+  const StreamManagementData(this.exclude, this.queueId);
+
+  /// Whether the stanza should be exluded from the StreamManagement's resend queue.
+  final bool exclude;
+
+  /// The ID to use when queuing the stanza.
+  final int? queueId;
+
+  /// If we resend a stanza, then we will have [queueId] set, so we should skip
+  /// incrementing the C2S counter.
+  bool get shouldCountStanza => queueId == null;
+}
+
+/// A queue element for keeping track of stanzas to (potentially) resend.
+@immutable
+class SMQueueEntry {
+  const SMQueueEntry(this.stanza, this.encrypted);
+
+  /// The actual stanza.
+  final Stanza stanza;
+
+  /// Flag indicating whether the stanza was encrypted before sending.
+  final bool encrypted;
+
+  @override
+  bool operator ==(Object other) {
+    return other is SMQueueEntry &&
+        other.stanza == stanza &&
+        other.encrypted == encrypted;
+  }
+
+  @override
+  int get hashCode => stanza.hashCode ^ encrypted.hashCode;
+}

packages/moxxmpp/lib/src/xeps/xep_0198/xep_0198.dart

@@ -11,10 +11,12 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/negotiator.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/nonzas.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/state.dart';
+import 'package:moxxmpp/src/xeps/xep_0198/types.dart';
 import 'package:synchronized/synchronized.dart';
 
 const xmlUintMax = 4294967296; // 2**32
@@ -27,10 +29,10 @@ class StreamManagementManager extends XmppManagerBase {
   }) : super(smManager);
 
   /// The queue of stanzas that are not (yet) acked
-  final Map<int, Stanza> _unackedStanzas = {};
+  final Map<int, SMQueueEntry> _unackedStanzas = {};
 
   /// Commitable state of the StreamManagementManager
-  StreamManagementState _state = StreamManagementState(0, 0);
+  StreamManagementState _state = const StreamManagementState(0, 0);
 
   /// Mutex lock for _state
   final Lock _stateLock = Lock();
@@ -60,7 +62,7 @@ class StreamManagementManager extends XmppManagerBase {
 
   /// Functions for testing
   @visibleForTesting
-  Map<int, Stanza> getUnackedStanzas() => _unackedStanzas;
+  Map<int, SMQueueEntry> getUnackedStanzas() => _unackedStanzas;
 
   @visibleForTesting
   Future<int> getPendingAcks() async {
@@ -73,6 +75,17 @@ class StreamManagementManager extends XmppManagerBase {
     return acks;
   }
 
+  @override
+  Future<void> onData() async {
+    // The ack timer does not matter if we are currently in the middle of receiving
+    // data.
+    await _ackLock.synchronized(() {
+      if (_pendingAcks > 0) {
+        _resetAckTimer();
+      }
+    });
+  }
+
   /// Called when a stanza has been acked to decide whether we should trigger a
   /// StanzaAckedEvent.
   ///
@@ -138,7 +151,7 @@ class StreamManagementManager extends XmppManagerBase {
           nonzaTag: 'a',
           nonzaXmlns: smXmlns,
           callback: _handleAckResponse,
-        )
+        ),
       ];
 
   @override
@@ -146,14 +159,14 @@ class StreamManagementManager extends XmppManagerBase {
         StanzaHandler(
           callback: _onServerStanzaReceived,
           priority: 9999,
-        )
+        ),
       ];
 
   @override
   List<StanzaHandler> getOutgoingPostStanzaHandlers() => [
         StanzaHandler(
           callback: _onClientStanzaSent,
-        )
+        ),
       ];
 
   @override
@@ -223,6 +236,12 @@ class StreamManagementManager extends XmppManagerBase {
     _ackTimer = null;
   }
 
+  /// Resets the ack timer.
+  void _resetAckTimer() {
+    _stopAckTimer();
+    _startAckTimer();
+  }
+
   @visibleForTesting
   Future<void> handleAckTimeout() async {
     _stopAckTimer();
@@ -305,12 +324,15 @@ class StreamManagementManager extends XmppManagerBase {
         if (_pendingAcks > 0) {
           // Prevent diff from becoming negative
           final diff = max(_state.c2s - h, 0);
+
+          logger.finest(
+            'Setting _pendingAcks to $diff (was $_pendingAcks before): max(${_state.c2s} - $h, 0)',
+          );
           _pendingAcks = diff;
 
           // Reset the timer
           if (_pendingAcks > 0) {
-            _stopAckTimer();
-            _startAckTimer();
+            _resetAckTimer();
           }
         }
 
@@ -335,15 +357,18 @@ class StreamManagementManager extends XmppManagerBase {
       final attrs = getAttributes();
       final sequences = _unackedStanzas.keys.toList()..sort();
       for (final height in sequences) {
+        logger.finest('Unacked stanza: height $height, h $h');
+
         // Do nothing if the ack does not concern this stanza
         if (height > h) continue;
 
-        final stanza = _unackedStanzas[height]!;
+        logger.finest('Removing stanza with height $height');
+        final entry = _unackedStanzas[height]!;
         _unackedStanzas.remove(height);
 
         // Create a StanzaAckedEvent if the stanza is correct
-        if (shouldTriggerAckedEvent(stanza)) {
-          attrs.sendEvent(StanzaAckedEvent(stanza));
+        if (shouldTriggerAckedEvent(entry.stanza)) {
+          attrs.sendEvent(StanzaAckedEvent(entry.stanza));
         }
       }
 
@@ -399,10 +424,30 @@ class StreamManagementManager extends XmppManagerBase {
     Stanza stanza,
     StanzaHandlerData state,
   ) async {
-    await _incrementC2S();
-    _unackedStanzas[_state.c2s] = stanza;
-
     if (isStreamManagementEnabled()) {
+      final smData = state.extensions.get<StreamManagementData>();
+      logger.finest('Should count stanza: ${smData?.shouldCountStanza}');
+      if (smData?.shouldCountStanza ?? true) {
+        await _incrementC2S();
+      }
+
+      if (smData?.exclude ?? false) {
+        return state;
+      }
+
+      int queueId;
+      if (smData?.queueId != null) {
+        logger.finest('Reusing queue id ${smData!.queueId}');
+        queueId = smData.queueId!;
+      } else {
+        queueId = await _stateLock.synchronized(() => _state.c2s);
+      }
+
+      _unackedStanzas[queueId] = SMQueueEntry(
+        stanza,
+        // Prevent an E2EE message being encrypted again
+        state.encrypted,
+      );
       await _sendAckRequest();
     }
 
@@ -410,11 +455,25 @@ class StreamManagementManager extends XmppManagerBase {
   }
 
   Future<void> _resendStanzas() async {
-    final stanzas = _unackedStanzas.values.toList();
-    _unackedStanzas.clear();
-
-    for (final stanza in stanzas) {
-      await getAttributes().sendStanza(stanza, awaitable: false);
+    final queueCopy = _unackedStanzas.entries.toList();
+    for (final entry in queueCopy) {
+      logger.finest(
+        'Resending ${entry.value.stanza.tag} with id ${entry.value.stanza.attributes["id"]}',
+      );
+      await getAttributes().sendStanza(
+        StanzaDetails(
+          entry.value.stanza,
+          postSendExtensions: TypedMap<StanzaHandlerExtension>.fromList([
+            StreamManagementData(
+              false,
+              entry.key,
+            ),
+          ]),
+          awaitable: false,
+          // Prevent an E2EE message being encrypted again
+          encrypted: entry.value.encrypted,
+        ),
+      );
     }
   }
 

packages/moxxmpp/lib/src/xeps/xep_0203.dart

@@ -1,4 +1,5 @@
 import 'package:meta/meta.dart';
+import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
@@ -7,10 +8,14 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 
 @immutable
-class DelayedDelivery {
-  const DelayedDelivery(this.from, this.timestamp);
+class DelayedDeliveryData implements StanzaHandlerExtension {
+  const DelayedDeliveryData(this.from, this.timestamp);
+
+  /// The timestamp the message was originally sent.
   final DateTime timestamp;
-  final String from;
+
+  /// The JID that originally sent the message.
+  final JID from;
 }
 
 class DelayedDeliveryManager extends XmppManagerBase {
@@ -23,6 +28,8 @@ class DelayedDeliveryManager extends XmppManagerBase {
   List<StanzaHandler> getIncomingStanzaHandlers() => [
         StanzaHandler(
           stanzaTag: 'message',
+          tagName: 'delay',
+          tagXmlns: delayedDeliveryXmlns,
           callback: _onIncomingMessage,
           priority: 200,
         ),
@@ -32,14 +39,14 @@ class DelayedDeliveryManager extends XmppManagerBase {
     Stanza stanza,
     StanzaHandlerData state,
   ) async {
-    final delay = stanza.firstTag('delay', xmlns: delayedDeliveryXmlns);
-    if (delay == null) return state;
+    final delay = stanza.firstTag('delay', xmlns: delayedDeliveryXmlns)!;
 
-    return state.copyWith(
-      delayedDelivery: DelayedDelivery(
-        delay.attributes['from']! as String,
-        DateTime.parse(delay.attributes['stamp']! as String),
-      ),
-    );
+    return state
+      ..extensions.set(
+        DelayedDeliveryData(
+          JID.fromString(delay.attributes['from']! as String),
+          DateTime.parse(delay.attributes['stamp']! as String),
+        ),
+      );
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0264.dart

@@ -0,0 +1,59 @@
+import 'package:moxxmpp/src/namespaces.dart';
+import 'package:moxxmpp/src/stringxml.dart';
+
+extension _StringToInt on String {
+  int toInt() => int.parse(this);
+}
+
+class JingleContentThumbnail {
+  const JingleContentThumbnail(
+    this.uri,
+    this.mediaType,
+    this.width,
+    this.height,
+  );
+
+  factory JingleContentThumbnail.fromXML(XMLNode thumbnail) {
+    assert(
+      thumbnail.tag == 'thumbnail',
+      'thumbnail must be Jingle Content Thumbnail',
+    );
+    assert(
+      thumbnail.attributes['xmlns'] == jingleContentThumbnailXmlns,
+      'thumbnail must be Jingle Content Thumbnail',
+    );
+
+    return JingleContentThumbnail(
+      Uri.parse(thumbnail.attributes['uri']! as String),
+      thumbnail.attributes['media-type'] as String?,
+      (thumbnail.attributes['width'] as String?)?.toInt(),
+      (thumbnail.attributes['height'] as String?)?.toInt(),
+    );
+  }
+
+  /// The URI of the thumbnail data.
+  final Uri uri;
+
+  /// The MIME type of the thumbnail
+  final String? mediaType;
+
+  /// The width of the thumbnail.
+  final int? width;
+
+  /// The height of the thumbnail.
+  final int? height;
+
+  /// Convert the thumbnail to its XML representation.
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'thumbnail',
+      xmlns: jingleContentThumbnailXmlns,
+      attributes: {
+        'uri': uri.toString(),
+        if (mediaType != null) 'media-type': mediaType!,
+        if (width != null) 'width': width.toString(),
+        if (height != null) 'height': height.toString(),
+      },
+    );
+  }
+}

packages/moxxmpp/lib/src/xeps/xep_0280.dart

@@ -1,6 +1,5 @@
 import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
-import 'package:moxxmpp/src/connection.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
@@ -15,6 +14,13 @@ import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
 import 'package:moxxmpp/src/xeps/xep_0297.dart';
 import 'package:moxxmpp/src/xeps/xep_0386.dart';
 
+class CarbonsData implements StanzaHandlerExtension {
+  const CarbonsData(this.isCarbon);
+
+  /// Indicates whether this message is a carbon.
+  final bool isCarbon;
+}
+
 /// This manager class implements support for XEP-0280.
 class CarbonsManager extends XmppManagerBase {
   CarbonsManager() : super(carbonsManager);
@@ -43,7 +49,7 @@ class CarbonsManager extends XmppManagerBase {
           tagXmlns: carbonsXmlns,
           callback: _onMessageSent,
           priority: -98,
-        )
+        ),
       ];
 
   @override
@@ -78,15 +84,14 @@ class CarbonsManager extends XmppManagerBase {
   ) async {
     final from = JID.fromString(message.attributes['from']! as String);
     final received = message.firstTag('received', xmlns: carbonsXmlns)!;
-    if (!isCarbonValid(from)) return state.copyWith(done: true);
+    if (!isCarbonValid(from)) return state..done = true;
 
     final forwarded = received.firstTag('forwarded', xmlns: forwardedXmlns)!;
     final carbon = unpackForwarded(forwarded);
 
-    return state.copyWith(
-      isCarbon: true,
-      stanza: carbon,
-    );
+    return state
+      ..extensions.set(const CarbonsData(true))
+      ..stanza = carbon;
   }
 
   Future<StanzaHandlerData> _onMessageSent(
@@ -95,15 +100,14 @@ class CarbonsManager extends XmppManagerBase {
   ) async {
     final from = JID.fromString(message.attributes['from']! as String);
     final sent = message.firstTag('sent', xmlns: carbonsXmlns)!;
-    if (!isCarbonValid(from)) return state.copyWith(done: true);
+    if (!isCarbonValid(from)) return state..done = true;
 
     final forwarded = sent.firstTag('forwarded', xmlns: forwardedXmlns)!;
     final carbon = unpackForwarded(forwarded);
 
-    return state.copyWith(
-      isCarbon: true,
-      stanza: carbon,
-    );
+    return state
+      ..extensions.set(const CarbonsData(true))
+      ..stanza = carbon;
   }
 
   /// Send a request to the server, asking it to enable Message Carbons.
@@ -111,20 +115,20 @@ class CarbonsManager extends XmppManagerBase {
   /// Returns true if carbons were enabled. False, if not.
   Future<bool> enableCarbons() async {
     final attrs = getAttributes();
-    final result = await attrs.sendStanza(
-      Stanza.iq(
-        to: attrs.getFullJID().toBare().toString(),
-        type: 'set',
-        children: [
-          XMLNode.xmlns(
-            tag: 'enable',
-            xmlns: carbonsXmlns,
-          )
-        ],
+    final result = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          to: attrs.getFullJID().toBare().toString(),
+          type: 'set',
+          children: [
+            XMLNode.xmlns(
+              tag: 'enable',
+              xmlns: carbonsXmlns,
+            ),
+          ],
+        ),
       ),
-      addFrom: StanzaFromType.full,
-      addId: true,
-    );
+    ))!;
 
     if (result.attributes['type'] != 'result') {
       logger.warning('Failed to enable message carbons');
@@ -142,19 +146,19 @@ class CarbonsManager extends XmppManagerBase {
   ///
   /// Returns true if carbons were disabled. False, if not.
   Future<bool> disableCarbons() async {
-    final result = await getAttributes().sendStanza(
-      Stanza.iq(
-        type: 'set',
-        children: [
-          XMLNode.xmlns(
-            tag: 'disable',
-            xmlns: carbonsXmlns,
-          )
-        ],
+    final result = (await getAttributes().sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          type: 'set',
+          children: [
+            XMLNode.xmlns(
+              tag: 'disable',
+              xmlns: carbonsXmlns,
+            ),
+          ],
+        ),
       ),
-      addFrom: StanzaFromType.full,
-      addId: true,
-    );
+    ))!;
 
     if (result.attributes['type'] != 'result') {
       logger.warning('Failed to disable message carbons');

packages/moxxmpp/lib/src/xeps/xep_0300.dart

@@ -5,6 +5,7 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
 /// Hash names
+const _hashSha1 = 'sha-1';
 const _hashSha256 = 'sha-256';
 const _hashSha512 = 'sha-512';
 const _hashSha3256 = 'sha3-256';
@@ -23,6 +24,9 @@ XMLNode constructHashElement(HashFunction hash, String value) {
 }
 
 enum HashFunction {
+  /// SHA-1
+  sha1,
+
   /// SHA-256
   sha256,
 
@@ -46,6 +50,8 @@ enum HashFunction {
   /// - XEP-0300
   factory HashFunction.fromName(String name) {
     switch (name) {
+      case _hashSha1:
+        return HashFunction.sha1;
       case _hashSha256:
         return HashFunction.sha256;
       case _hashSha512:
@@ -60,12 +66,36 @@ enum HashFunction {
         return HashFunction.blake2b512;
     }
 
-    throw Exception();
+    throw Exception('Invalid hash function $name');
+  }
+
+  /// Like [HashFunction.fromName], but returns null if the hash function is unknown
+  static HashFunction? maybeFromName(String name) {
+    switch (name) {
+      case _hashSha1:
+        return HashFunction.sha1;
+      case _hashSha256:
+        return HashFunction.sha256;
+      case _hashSha512:
+        return HashFunction.sha512;
+      case _hashSha3256:
+        return HashFunction.sha3_256;
+      case _hashSha3512:
+        return HashFunction.sha3_512;
+      case _hashBlake2b256:
+        return HashFunction.blake2b256;
+      case _hashBlake2b512:
+        return HashFunction.blake2b512;
+    }
+
+    return null;
   }
 
   /// Return the hash function's name according to IANA's hash name register or XEP-0300.
   String toName() {
     switch (this) {
+      case HashFunction.sha1:
+        return _hashSha1;
       case HashFunction.sha256:
         return _hashSha256;
       case HashFunction.sha512:
@@ -88,6 +118,9 @@ class CryptographicHashManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
+  /// NOTE: We intentionally do not advertise support for SHA-1, as it is marked as
+  ///       MUST NOT. Sha-1 support is only for providing a wrapper over its hash
+  ///       function, for example for XEP-0115.
   @override
   List<String> getDiscoFeatures() => [
         '$hashFunctionNameBaseXmlns:$_hashSha256',
@@ -107,6 +140,9 @@ class CryptographicHashManager extends XmppManagerBase {
     // TODO(PapaTutuWawa): Implement the others as well
     HashAlgorithm algo;
     switch (function) {
+      case HashFunction.sha1:
+        algo = Sha1();
+        break;
       case HashFunction.sha256:
         algo = Sha256();
         break;

packages/moxxmpp/lib/src/xeps/xep_0308.dart

@@ -2,18 +2,27 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
-XMLNode makeLastMessageCorrectionEdit(String id) {
-  return XMLNode.xmlns(
-    tag: 'replace',
-    xmlns: lmcXmlns,
-    attributes: <String, String>{
-      'id': id,
-    },
-  );
+class LastMessageCorrectionData implements StanzaHandlerExtension {
+  const LastMessageCorrectionData(this.id);
+
+  /// The id the LMC applies to.
+  final String id;
+
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'replace',
+      xmlns: lmcXmlns,
+      attributes: {
+        'id': id,
+      },
+    );
+  }
 }
 
 class LastMessageCorrectionManager extends XmppManagerBase {
@@ -31,7 +40,7 @@ class LastMessageCorrectionManager extends XmppManagerBase {
           callback: _onMessage,
           // Before the message handler
           priority: -99,
-        )
+        ),
       ];
 
   @override
@@ -42,8 +51,30 @@ class LastMessageCorrectionManager extends XmppManagerBase {
     StanzaHandlerData state,
   ) async {
     final edit = stanza.firstTag('replace', xmlns: lmcXmlns)!;
-    return state.copyWith(
-      lastMessageCorrectionSid: edit.attributes['id']! as String,
-    );
+    return state
+      ..extensions.set(
+        LastMessageCorrectionData(edit.attributes['id']! as String),
+      );
+  }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final data = extensions.get<LastMessageCorrectionData>();
+    return data != null
+        ? [
+            data.toXML(),
+          ]
+        : [];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0333.dart

@@ -4,27 +4,86 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
-XMLNode makeChatMarkerMarkable() {
-  return XMLNode.xmlns(
-    tag: 'markable',
-    xmlns: chatMarkersXmlns,
-  );
+enum ChatMarker {
+  received,
+  displayed,
+  acknowledged;
+
+  factory ChatMarker.fromName(String name) {
+    switch (name) {
+      case 'received':
+        return ChatMarker.received;
+      case 'displayed':
+        return ChatMarker.displayed;
+      case 'acknowledged':
+        return ChatMarker.acknowledged;
+    }
+
+    throw Exception('Invalid chat marker $name');
+  }
+
+  XMLNode toXML() {
+    String tag;
+    switch (this) {
+      case ChatMarker.received:
+        tag = 'received';
+        break;
+      case ChatMarker.displayed:
+        tag = 'displayed';
+        break;
+      case ChatMarker.acknowledged:
+        tag = 'acknowledged';
+        break;
+    }
+
+    return XMLNode.xmlns(
+      tag: tag,
+      xmlns: chatMarkersXmlns,
+    );
+  }
 }
 
-XMLNode makeChatMarker(String tag, String id) {
-  assert(
-    ['received', 'displayed', 'acknowledged'].contains(tag),
-    'Invalid chat marker',
-  );
-  return XMLNode.xmlns(
-    tag: tag,
-    xmlns: chatMarkersXmlns,
-    attributes: {'id': id},
-  );
+class MarkableData implements StanzaHandlerExtension {
+  const MarkableData(this.isMarkable);
+
+  /// Indicates whether the message can be replied to with a chat marker.
+  final bool isMarkable;
+
+  XMLNode toXML() {
+    assert(isMarkable, '');
+
+    return XMLNode.xmlns(
+      tag: 'markable',
+      xmlns: chatMarkersXmlns,
+    );
+  }
+}
+
+class ChatMarkerData implements StanzaHandlerExtension {
+  const ChatMarkerData(this.marker, this.id);
+
+  /// The actual chat state
+  final ChatMarker marker;
+
+  /// The ID the chat marker applies to
+  final String id;
+
+  XMLNode toXML() {
+    final tag = marker.toXML();
+    return XMLNode.xmlns(
+      tag: tag.tag,
+      xmlns: chatMarkersXmlns,
+      attributes: {
+        'id': id,
+      },
+    );
+  }
 }
 
 class ChatMarkerManager extends XmppManagerBase {
@@ -41,7 +100,7 @@ class ChatMarkerManager extends XmppManagerBase {
           callback: _onMessage,
           // Before the message handler
           priority: -99,
-        )
+        ),
       ];
 
   @override
@@ -51,23 +110,52 @@ class ChatMarkerManager extends XmppManagerBase {
     Stanza message,
     StanzaHandlerData state,
   ) async {
-    final marker = message.firstTagByXmlns(chatMarkersXmlns)!;
+    final element = message.firstTagByXmlns(chatMarkersXmlns)!;
 
     // Handle the <markable /> explicitly
-    if (marker.tag == 'markable') return state.copyWith(isMarkable: true);
-
-    if (!['received', 'displayed', 'acknowledged'].contains(marker.tag)) {
-      logger.warning("Unknown message marker '${marker.tag}' found.");
-    } else {
-      getAttributes().sendEvent(
-        ChatMarkerEvent(
-          from: JID.fromString(message.from!),
-          type: marker.tag,
-          id: marker.attributes['id']! as String,
-        ),
-      );
+    if (element.tag == 'markable') {
+      return state..extensions.set(const MarkableData(true));
     }
 
-    return state.copyWith(done: true);
+    try {
+      getAttributes().sendEvent(
+        ChatMarkerEvent(
+          JID.fromString(message.from!),
+          ChatMarker.fromName(element.tag),
+          element.attributes['id']! as String,
+        ),
+      );
+    } catch (_) {
+      logger.warning("Unknown message marker '${element.tag}' found.");
+    }
+
+    return state..done = true;
+  }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final children = List<XMLNode>.empty(growable: true);
+    final marker = extensions.get<ChatMarkerData>();
+    if (marker != null) {
+      children.add(marker.toXML());
+    }
+
+    final markable = extensions.get<MarkableData>();
+    if (markable != null) {
+      children.add(markable.toXML());
+    }
+
+    return children;
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0334.dart

@@ -1,31 +1,36 @@
+import 'package:moxxmpp/src/managers/base.dart';
+import 'package:moxxmpp/src/managers/data.dart';
+import 'package:moxxmpp/src/managers/handlers.dart';
+import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
+import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
 enum MessageProcessingHint {
   noPermanentStore,
   noStore,
   noCopies,
-  store,
-}
+  store;
 
-MessageProcessingHint messageProcessingHintFromXml(XMLNode element) {
-  switch (element.tag) {
-    case 'no-permanent-store':
-      return MessageProcessingHint.noPermanentStore;
-    case 'no-store':
-      return MessageProcessingHint.noStore;
-    case 'no-copy':
-      return MessageProcessingHint.noCopies;
-    case 'store':
-      return MessageProcessingHint.store;
+  factory MessageProcessingHint.fromName(String name) {
+    switch (name) {
+      case 'no-permanent-store':
+        return MessageProcessingHint.noPermanentStore;
+      case 'no-store':
+        return MessageProcessingHint.noStore;
+      case 'no-copy':
+        return MessageProcessingHint.noCopies;
+      case 'store':
+        return MessageProcessingHint.store;
+    }
+
+    assert(false, 'Invalid Message Processing Hint: $name');
+    return MessageProcessingHint.noStore;
   }
 
-  assert(false, 'Invalid Message Processing Hint: ${element.tag}');
-  return MessageProcessingHint.noStore;
-}
-
-extension XmlExtension on MessageProcessingHint {
-  XMLNode toXml() {
+  XMLNode toXML() {
     String tag;
     switch (this) {
       case MessageProcessingHint.noPermanentStore:
@@ -48,3 +53,60 @@ extension XmlExtension on MessageProcessingHint {
     );
   }
 }
+
+class MessageProcessingHintData implements StanzaHandlerExtension {
+  const MessageProcessingHintData(this.hints);
+
+  /// The attached message processing hints.
+  final List<MessageProcessingHint> hints;
+}
+
+class MessageProcessingHintManager extends XmppManagerBase {
+  MessageProcessingHintManager() : super(messageProcessingHintManager);
+
+  @override
+  Future<bool> isSupported() async => true;
+
+  @override
+  List<StanzaHandler> getIncomingStanzaHandlers() => [
+        StanzaHandler(
+          stanzaTag: 'message',
+          tagXmlns: messageProcessingHintsXmlns,
+          callback: _onMessage,
+          // Before the message handler
+          priority: -99,
+        ),
+      ];
+
+  Future<StanzaHandlerData> _onMessage(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
+    final elements = stanza.findTagsByXmlns(messageProcessingHintsXmlns);
+    return state
+      ..extensions.set(
+        MessageProcessingHintData(
+          elements
+              .map((element) => MessageProcessingHint.fromName(element.tag))
+              .toList(),
+        ),
+      );
+  }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final data = extensions.get<MessageProcessingHintData>();
+    return data != null ? data.hints.map((hint) => hint.toXML()).toList() : [];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
+  }
+}

packages/moxxmpp/lib/src/xeps/xep_0352.dart

@@ -1,10 +1,10 @@
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0386.dart';
 
 class CSIActiveNonza extends XMLNode {

packages/moxxmpp/lib/src/xeps/xep_0359.dart

@@ -3,28 +3,69 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
-import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
-/// Represents data provided by XEP-0359.
-/// NOTE: [StableStanzaId.stanzaId] must not be confused with the actual id attribute of
-///       the message stanza.
-class StableStanzaId {
-  const StableStanzaId({this.originId, this.stanzaId, this.stanzaIdBy});
-  final String? originId;
-  final String? stanzaId;
-  final String? stanzaIdBy;
+/// Representation of a <stanza-id /> element.
+class StanzaId {
+  const StanzaId(
+    this.id,
+    this.by,
+  );
+
+  /// The unique stanza id.
+  final String id;
+
+  /// The JID the id was generated by.
+  final JID by;
+
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'stanza-id',
+      xmlns: stableIdXmlns,
+      attributes: {
+        'id': id,
+        'by': by.toString(),
+      },
+    );
+  }
 }
 
-XMLNode makeOriginIdElement(String id) {
-  return XMLNode.xmlns(
-    tag: 'origin-id',
-    xmlns: stableIdXmlns,
-    attributes: {'id': id},
-  );
+class StableIdData implements StanzaHandlerExtension {
+  const StableIdData(this.originId, this.stanzaIds);
+
+  /// <origin-id />
+  final String? originId;
+
+  /// Stanza ids
+  final List<StanzaId>? stanzaIds;
+
+  XMLNode toOriginIdElement() {
+    assert(
+      originId != null,
+      'Can only build the XML element if originId != null',
+    );
+    return XMLNode.xmlns(
+      tag: 'origin-id',
+      xmlns: stableIdXmlns,
+      attributes: {'id': originId!},
+    );
+  }
+
+  List<XMLNode> toXML() {
+    return [
+      if (originId != null)
+        XMLNode.xmlns(
+          tag: 'origin-id',
+          xmlns: stableIdXmlns,
+          attributes: {'id': originId!},
+        ),
+      if (stanzaIds != null) ...stanzaIds!.map((s) => s.toXML()),
+    ];
+  }
 }
 
 class StableIdManager extends XmppManagerBase {
@@ -40,7 +81,7 @@ class StableIdManager extends XmppManagerBase {
           callback: _onMessage,
           // Before the MessageManager
           priority: -99,
-        )
+        ),
       ];
 
   @override
@@ -50,50 +91,58 @@ class StableIdManager extends XmppManagerBase {
     Stanza message,
     StanzaHandlerData state,
   ) async {
-    final from = JID.fromString(message.attributes['from']! as String);
     String? originId;
-    String? stanzaId;
-    String? stanzaIdBy;
-    final originIdTag = message.firstTag('origin-id', xmlns: stableIdXmlns);
-    final stanzaIdTag = message.firstTag('stanza-id', xmlns: stableIdXmlns);
+    List<StanzaId>? stanzaIds;
+    final originIdElement = message.firstTag('origin-id', xmlns: stableIdXmlns);
+    final stanzaIdElements =
+        message.findTags('stanza-id', xmlns: stableIdXmlns);
 
     // Process the origin id
-    if (originIdTag != null) {
-      logger.finest('Found origin Id tag');
-      originId = originIdTag.attributes['id']! as String;
+    if (originIdElement != null) {
+      originId = originIdElement.attributes['id']! as String;
     }
 
     // Process the stanza id tag
-    if (stanzaIdTag != null) {
-      logger.finest('Found stanza Id tag');
-      final attrs = getAttributes();
-      final disco = attrs.getManagerById<DiscoManager>(discoManager)!;
-      final result = await disco.discoInfoQuery(from.toString());
-      if (result.isType<DiscoInfo>()) {
-        final info = result.get<DiscoInfo>();
-        logger.finest('Got info for ${from.toString()}');
-        if (info.features.contains(stableIdXmlns)) {
-          logger.finest('${from.toString()} supports $stableIdXmlns.');
-          stanzaId = stanzaIdTag.attributes['id']! as String;
-          stanzaIdBy = stanzaIdTag.attributes['by']! as String;
-        } else {
-          logger.finest(
-            '${from.toString()} does not support $stableIdXmlns. Ignoring stanza id... ',
-          );
-        }
-      } else {
-        logger.finest(
-          'Failed to find out if ${from.toString()} supports $stableIdXmlns. Ignoring... ',
-        );
-      }
+    if (stanzaIdElements.isNotEmpty) {
+      stanzaIds = stanzaIdElements
+          .map(
+            (element) => StanzaId(
+              element.attributes['id']! as String,
+              JID.fromString(element.attributes['by']! as String),
+            ),
+          )
+          .toList();
     }
 
-    return state.copyWith(
-      stableId: StableStanzaId(
-        originId: originId,
-        stanzaId: stanzaId,
-        stanzaIdBy: stanzaIdBy,
-      ),
-    );
+    return state
+      ..extensions.set(
+        StableIdData(
+          originId,
+          stanzaIds,
+        ),
+      );
+  }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final data = extensions.get<StableIdData>();
+    if (data?.originId != null) {
+      return [
+        data!.toOriginIdElement(),
+      ];
+    }
+
+    return [];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0363/xep_0363.dart

@@ -1,3 +1,4 @@
+import 'package:collection/collection.dart';
 import 'package:meta/meta.dart';
 import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
@@ -7,7 +8,6 @@ import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
@@ -58,10 +58,10 @@ class HttpFileUploadManager extends XmppManagerBase {
   /// Returns whether the entity provided an identity that tells us that we can ask it
   /// for an HTTP upload slot.
   bool _containsFileUploadIdentity(DiscoInfo info) {
-    return listContains(
-      info.identities,
-      (Identity id) => id.category == 'store' && id.type == 'file',
-    );
+    return info.identities.firstWhereOrNull(
+          (Identity id) => id.category == 'store' && id.type == 'file',
+        ) !=
+        null;
   }
 
   /// Extract the maximum filesize in octets from the disco response. Returns null
@@ -149,23 +149,25 @@ class HttpFileUploadManager extends XmppManagerBase {
     }
 
     final attrs = getAttributes();
-    final response = await attrs.sendStanza(
-      Stanza.iq(
-        to: _entityJid.toString(),
-        type: 'get',
-        children: [
-          XMLNode.xmlns(
-            tag: 'request',
-            xmlns: httpFileUploadXmlns,
-            attributes: {
-              'filename': filename,
-              'size': filesize.toString(),
-              ...contentType != null ? {'content-type': contentType} : {}
-            },
-          )
-        ],
+    final response = (await attrs.sendStanza(
+      StanzaDetails(
+        Stanza.iq(
+          to: _entityJid.toString(),
+          type: 'get',
+          children: [
+            XMLNode.xmlns(
+              tag: 'request',
+              xmlns: httpFileUploadXmlns,
+              attributes: {
+                'filename': filename,
+                'size': filesize.toString(),
+                if (contentType != null) 'content-type': contentType,
+              },
+            ),
+          ],
+        ),
       ),
-    );
+    ))!;
 
     if (response.attributes['type']! != 'result') {
       logger.severe('Failed to request HTTP File Upload slot.');

packages/moxxmpp/lib/src/xeps/xep_0380.dart

@@ -6,64 +6,64 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
-enum ExplicitEncryptionType {
+enum ExplicitEncryptionType implements StanzaHandlerExtension {
   otr,
   legacyOpenPGP,
   openPGP,
   omemo,
   omemo1,
   omemo2,
-  unknown,
-}
+  unknown;
 
-String _explicitEncryptionTypeToString(ExplicitEncryptionType type) {
-  switch (type) {
-    case ExplicitEncryptionType.otr:
-      return emeOtr;
-    case ExplicitEncryptionType.legacyOpenPGP:
-      return emeLegacyOpenPGP;
-    case ExplicitEncryptionType.openPGP:
-      return emeOpenPGP;
-    case ExplicitEncryptionType.omemo:
-      return emeOmemo;
-    case ExplicitEncryptionType.omemo1:
-      return emeOmemo1;
-    case ExplicitEncryptionType.omemo2:
-      return emeOmemo2;
-    case ExplicitEncryptionType.unknown:
-      return '';
+  factory ExplicitEncryptionType.fromNamespace(String namespace) {
+    switch (namespace) {
+      case emeOtr:
+        return ExplicitEncryptionType.otr;
+      case emeLegacyOpenPGP:
+        return ExplicitEncryptionType.legacyOpenPGP;
+      case emeOpenPGP:
+        return ExplicitEncryptionType.openPGP;
+      case emeOmemo:
+        return ExplicitEncryptionType.omemo;
+      case emeOmemo1:
+        return ExplicitEncryptionType.omemo1;
+      case emeOmemo2:
+        return ExplicitEncryptionType.omemo2;
+      default:
+        return ExplicitEncryptionType.unknown;
+    }
   }
-}
 
-ExplicitEncryptionType _explicitEncryptionTypeFromString(String str) {
-  switch (str) {
-    case emeOtr:
-      return ExplicitEncryptionType.otr;
-    case emeLegacyOpenPGP:
-      return ExplicitEncryptionType.legacyOpenPGP;
-    case emeOpenPGP:
-      return ExplicitEncryptionType.openPGP;
-    case emeOmemo:
-      return ExplicitEncryptionType.omemo;
-    case emeOmemo1:
-      return ExplicitEncryptionType.omemo1;
-    case emeOmemo2:
-      return ExplicitEncryptionType.omemo2;
-    default:
-      return ExplicitEncryptionType.unknown;
+  String toNamespace() {
+    switch (this) {
+      case ExplicitEncryptionType.otr:
+        return emeOtr;
+      case ExplicitEncryptionType.legacyOpenPGP:
+        return emeLegacyOpenPGP;
+      case ExplicitEncryptionType.openPGP:
+        return emeOpenPGP;
+      case ExplicitEncryptionType.omemo:
+        return emeOmemo;
+      case ExplicitEncryptionType.omemo1:
+        return emeOmemo1;
+      case ExplicitEncryptionType.omemo2:
+        return emeOmemo2;
+      case ExplicitEncryptionType.unknown:
+        return '';
+    }
   }
-}
 
-/// Create an <encryption /> element with [type] indicating which type of encryption was
-/// used.
-XMLNode buildEmeElement(ExplicitEncryptionType type) {
-  return XMLNode.xmlns(
-    tag: 'encryption',
-    xmlns: emeXmlns,
-    attributes: <String, String>{
-      'namespace': _explicitEncryptionTypeToString(type),
-    },
-  );
+  /// Create an <encryption /> element with an xmlns indicating what type of encryption was
+  /// used.
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'encryption',
+      xmlns: emeXmlns,
+      attributes: <String, String>{
+        'namespace': toNamespace(),
+      },
+    );
+  }
 }
 
 class EmeManager extends XmppManagerBase {
@@ -91,10 +91,11 @@ class EmeManager extends XmppManagerBase {
   ) async {
     final encryption = message.firstTag('encryption', xmlns: emeXmlns)!;
 
-    return state.copyWith(
-      encryptionType: _explicitEncryptionTypeFromString(
-        encryption.attributes['namespace']! as String,
-      ),
-    );
+    return state
+      ..extensions.set(
+        ExplicitEncryptionType.fromNamespace(
+          encryption.attributes['namespace']! as String,
+        ),
+      );
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0384/errors.dart

@@ -2,10 +2,14 @@ abstract class OmemoError {}
 
 class UnknownOmemoError extends OmemoError {}
 
-class InvalidAffixElementsException with Exception {}
+class InvalidAffixElementsException implements Exception {}
+
+/// Internal exception that is returned when the device list cannot be
+/// fetched because the returned list is empty.
+class EmptyDeviceListException implements OmemoError {}
 
 class OmemoNotSupportedForContactException extends OmemoError {}
 
-class EncryptionFailedException with Exception {}
+class EncryptionFailedException implements Exception {}
 
-class InvalidEnvelopePayloadException with Exception {}
+class InvalidEnvelopePayloadException implements Exception {}

packages/moxxmpp/lib/src/xeps/xep_0384/types.dart

@@ -1,6 +1,29 @@
+import 'package:moxxmpp/src/managers/data.dart';
+import 'package:omemo_dart/omemo_dart.dart';
+
 /// A simple wrapper class for defining elements that should not be encrypted.
 class DoNotEncrypt {
   const DoNotEncrypt(this.tag, this.xmlns);
+
+  /// The tag of the element.
   final String tag;
+
+  /// The xmlns attribute of the element.
   final String xmlns;
 }
+
+/// An encryption error caused by OMEMO.
+class OmemoEncryptionError {
+  const OmemoEncryptionError(this.deviceEncryptionErrors);
+
+  /// See omemo_dart's EncryptionResult for info on this field.
+  final Map<String, List<EncryptToJidError>> deviceEncryptionErrors;
+}
+
+class OmemoData extends StanzaHandlerExtension {
+  OmemoData(this.newRatchets, this.replacedRatchets);
+
+  final Map<String, List<int>> newRatchets;
+
+  final Map<String, List<int>> replacedRatchets;
+}

packages/moxxmpp/lib/src/xeps/xep_0384/xep_0384.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'package:meta/meta.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/managers/base.dart';
@@ -10,7 +11,6 @@ import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
@@ -23,9 +23,21 @@ import 'package:moxxmpp/src/xeps/xep_0384/crypto.dart';
 import 'package:moxxmpp/src/xeps/xep_0384/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0384/helpers.dart';
 import 'package:moxxmpp/src/xeps/xep_0384/types.dart';
-import 'package:omemo_dart/omemo_dart.dart';
+import 'package:omemo_dart/omemo_dart.dart' as omemo;
 import 'package:xml/xml.dart';
 
+/// A callback that is executed whenever we need to acquire the OmemoManager backing
+/// the manager.
+typedef GetOmemoManagerCallback = Future<omemo.OmemoManager> Function();
+
+/// A callback for figuring out whether a stanza should be encrypted or not. Note that
+/// returning true here does not necessarily mean that a stanza gets encrypted because
+/// handlers can indicate that a stanza should not be encrypted, e.g. PubSub.
+typedef ShouldEncryptStanzaCallback = Future<bool> Function(
+  JID toJid,
+  Stanza stanza,
+);
+
 const _doNotEncryptList = [
   // XEP-0033
   DoNotEncrypt('addresses', extendedAddressingXmlns),
@@ -42,8 +54,15 @@ const _doNotEncryptList = [
   DoNotEncrypt('stanza-id', stableIdXmlns),
 ];
 
-abstract class BaseOmemoManager extends XmppManagerBase {
-  BaseOmemoManager() : super(omemoManager);
+class OmemoManager extends XmppManagerBase {
+  OmemoManager(this._getOmemoManager, this._shouldEncryptStanza)
+      : super(omemoManager);
+
+  /// Callback for getting the [omemo.OmemoManager].
+  final GetOmemoManagerCallback _getOmemoManager;
+
+  /// Callback for checking whether a stanza should be encrypted or not.
+  final ShouldEncryptStanzaCallback _shouldEncryptStanza;
 
   // TODO(Unknown): Technically, this is not always true
   @override
@@ -112,22 +131,19 @@ abstract class BaseOmemoManager extends XmppManagerBase {
       }
 
       // Tell the OmemoManager
-      (await getOmemoManager()).onDeviceListUpdate(jid.toString(), ids);
+      await (await _getOmemoManager()).onDeviceListUpdate(jid.toString(), ids);
 
       // Generate an event
       getAttributes().sendEvent(OmemoDeviceListUpdatedEvent(jid, ids));
     }
   }
 
-  @visibleForOverriding
-  Future<OmemoManager> getOmemoManager();
+  /// Wrapper around using getSessionManager and then calling getDeviceId on it.
+  Future<int> _getDeviceId() async => (await _getOmemoManager()).getDeviceId();
 
   /// Wrapper around using getSessionManager and then calling getDeviceId on it.
-  Future<int> _getDeviceId() async => (await getOmemoManager()).getDeviceId();
-
-  /// Wrapper around using getSessionManager and then calling getDeviceId on it.
-  Future<OmemoBundle> _getDeviceBundle() async {
-    final om = await getOmemoManager();
+  Future<omemo.OmemoBundle> _getDeviceBundle() async {
+    final om = await _getOmemoManager();
     final device = await om.getDevice();
     return device.toBundle();
   }
@@ -198,53 +214,45 @@ abstract class BaseOmemoManager extends XmppManagerBase {
   }
 
   XMLNode _buildEncryptedElement(
-    EncryptionResult result,
+    omemo.EncryptionResult result,
     String recipientJid,
     int deviceId,
   ) {
     final keyElements = <String, List<XMLNode>>{};
-    for (final key in result.encryptedKeys) {
-      final keyElement = XMLNode(
-        tag: 'key',
-        attributes: <String, String>{
-          'rid': '${key.rid}',
-          'kex': key.kex ? 'true' : 'false',
-        },
-        text: key.value,
-      );
-
-      if (keyElements.containsKey(key.jid)) {
-        keyElements[key.jid]!.add(keyElement);
-      } else {
-        keyElements[key.jid] = [keyElement];
-      }
+    for (final keys in result.encryptedKeys.entries) {
+      keyElements[keys.key] = keys.value
+          .map(
+            (ek) => XMLNode(
+              tag: 'key',
+              attributes: {
+                'rid': ek.rid.toString(),
+                if (ek.kex) 'kex': 'true',
+              },
+              text: ek.value,
+            ),
+          )
+          .toList();
     }
 
     final keysElements = keyElements.entries.map((entry) {
       return XMLNode(
         tag: 'keys',
-        attributes: <String, String>{
+        attributes: {
           'jid': entry.key,
         },
         children: entry.value,
       );
     }).toList();
 
-    var payloadElement = <XMLNode>[];
-    if (result.ciphertext != null) {
-      payloadElement = [
-        XMLNode(
-          tag: 'payload',
-          text: base64.encode(result.ciphertext!),
-        ),
-      ];
-    }
-
     return XMLNode.xmlns(
       tag: 'encrypted',
       xmlns: omemoXmlns,
       children: [
-        ...payloadElement,
+        if (result.ciphertext != null)
+          XMLNode(
+            tag: 'payload',
+            text: base64Encode(result.ciphertext!),
+          ),
         XMLNode(
           tag: 'header',
           attributes: <String, String>{
@@ -258,34 +266,36 @@ abstract class BaseOmemoManager extends XmppManagerBase {
 
   /// For usage with omemo_dart's OmemoManager.
   Future<void> sendEmptyMessageImpl(
-    EncryptionResult result,
+    omemo.EncryptionResult result,
     String toJid,
   ) async {
     await getAttributes().sendStanza(
-      Stanza.message(
-        to: toJid,
-        type: 'chat',
-        children: [
-          _buildEncryptedElement(
-            result,
-            toJid,
-            await _getDeviceId(),
-          ),
+      StanzaDetails(
+        Stanza.message(
+          to: toJid,
+          type: 'chat',
+          children: [
+            _buildEncryptedElement(
+              result,
+              toJid,
+              await _getDeviceId(),
+            ),
 
-          // Add a storage hint in case this is a message
-          // Taken from the example at
-          // https://xmpp.org/extensions/xep-0384.html#message-structure-description.
-          MessageProcessingHint.store.toXml(),
-        ],
+            // Add a storage hint in case this is a message
+            // Taken from the example at
+            // https://xmpp.org/extensions/xep-0384.html#message-structure-description.
+            MessageProcessingHint.store.toXML(),
+          ],
+        ),
+        awaitable: false,
+        encrypted: true,
       ),
-      awaitable: false,
-      encrypted: true,
     );
   }
 
   /// Send a heartbeat message to [jid].
   Future<void> sendOmemoHeartbeat(String jid) async {
-    final om = await getOmemoManager();
+    final om = await _getOmemoManager();
     await om.sendOmemoHeartbeat(jid);
   }
 
@@ -298,17 +308,22 @@ abstract class BaseOmemoManager extends XmppManagerBase {
   }
 
   /// For usage with omemo_dart's OmemoManager
-  Future<OmemoBundle?> fetchDeviceBundle(String jid, int id) async {
+  Future<omemo.OmemoBundle?> fetchDeviceBundle(String jid, int id) async {
     final result = await retrieveDeviceBundle(JID.fromString(jid), id);
     if (result.isType<OmemoError>()) return null;
 
-    return result.get<OmemoBundle>();
+    return result.get<omemo.OmemoBundle>();
   }
 
   Future<StanzaHandlerData> _onOutgoingStanza(
     Stanza stanza,
     StanzaHandlerData state,
   ) async {
+    if (!state.shouldEncrypt) {
+      logger.finest('Not encrypting since state.shouldEncrypt is false');
+      return state;
+    }
+
     if (state.encrypted) {
       logger.finest('Not encrypting since state.encrypted is true');
       return state;
@@ -321,7 +336,7 @@ abstract class BaseOmemoManager extends XmppManagerBase {
     }
 
     final toJid = JID.fromString(stanza.to!).toBare();
-    final shouldEncryptResult = await shouldEncryptStanza(toJid, stanza);
+    final shouldEncryptResult = await _shouldEncryptStanza(toJid, stanza);
     if (!shouldEncryptResult && !state.forceEncryption) {
       logger.finest(
         'Not encrypting stanza for $toJid: Both shouldEncryptStanza and forceEncryption are false.',
@@ -348,32 +363,31 @@ abstract class BaseOmemoManager extends XmppManagerBase {
             .getManagerById<CarbonsManager>(carbonsManager)
             ?.isEnabled ??
         false;
-    final om = await getOmemoManager();
+    final om = await _getOmemoManager();
+    final encryptToJids = [
+      toJid.toString(),
+      if (carbonsEnabled) getAttributes().getFullJID().toBare().toString(),
+    ];
     final result = await om.onOutgoingStanza(
-      OmemoOutgoingStanza(
-        [
-          toJid.toString(),
-          if (carbonsEnabled) getAttributes().getFullJID().toBare().toString(),
-        ],
+      omemo.OmemoOutgoingStanza(
+        encryptToJids,
         _buildEnvelope(toEncrypt, toJid.toString()),
       ),
     );
     logger.finest('Encryption done');
 
-    if (!result.isSuccess(2)) {
-      final other = Map<String, dynamic>.from(state.other);
-      other['encryption_error_jids'] = result.jidEncryptionErrors;
-      other['encryption_error_devices'] = result.deviceEncryptionErrors;
-      return state.copyWith(
-        other: other,
+    if (!result.canSend) {
+      return state
+        ..cancel = true
         // If we have no device list for toJid, then the contact most likely does not
         // support OMEMO:2
-        cancelReason: result.jidEncryptionErrors[toJid.toString()]
-                is NoKeyMaterialAvailableException
+        ..cancelReason = result.deviceEncryptionErrors[toJid.toString()]!.first
+                .error is omemo.NoKeyMaterialAvailableError
             ? OmemoNotSupportedForContactException()
-            : UnknownOmemoError(),
-        cancel: true,
-      );
+            : UnknownOmemoError()
+        ..encryptionError = OmemoEncryptionError(
+          result.deviceEncryptionErrors,
+        );
     }
 
     final encrypted = _buildEncryptedElement(
@@ -387,72 +401,63 @@ abstract class BaseOmemoManager extends XmppManagerBase {
     if (stanza.tag == 'message') {
       children
         // Add EME data
-        ..add(buildEmeElement(ExplicitEncryptionType.omemo2))
+        ..add(ExplicitEncryptionType.omemo2.toXML())
         // Add a storage hint in case this is a message
         // Taken from the example at
         // https://xmpp.org/extensions/xep-0384.html#message-structure-description.
-        ..add(MessageProcessingHint.store.toXml());
+        ..add(MessageProcessingHint.store.toXML());
     }
 
-    return state.copyWith(
-      stanza: state.stanza.copyWith(
-        children: children,
-      ),
-      encrypted: true,
-    );
+    return state
+      ..stanza = state.stanza.copyWith(children: children)
+      ..encrypted = true;
   }
 
-  /// This function is called whenever a message is to be encrypted. If it returns true,
-  /// then the message will be encrypted. If it returns false, the message won't be
-  /// encrypted.
-  @visibleForOverriding
-  Future<bool> shouldEncryptStanza(JID toJid, Stanza stanza);
-
   Future<StanzaHandlerData> _onIncomingStanza(
     Stanza stanza,
     StanzaHandlerData state,
   ) async {
-    final encrypted = stanza.firstTag('encrypted', xmlns: omemoXmlns);
-    if (encrypted == null) return state;
     if (stanza.from == null) return state;
 
+    final encrypted = stanza.firstTag('encrypted', xmlns: omemoXmlns)!;
     final fromJid = JID.fromString(stanza.from!).toBare();
     final header = encrypted.firstTag('header')!;
-    final payloadElement = encrypted.firstTag('payload');
-    final keys = List<EncryptedKey>.empty(growable: true);
+    final ourJid = getAttributes().getFullJID();
+    final ourJidString = ourJid.toBare().toString();
+    final keys = List<omemo.EncryptedKey>.empty(growable: true);
     for (final keysElement in header.findTags('keys')) {
+      // We only care about our own JID
       final jid = keysElement.attributes['jid']! as String;
-      for (final key in keysElement.findTags('key')) {
-        keys.add(
-          EncryptedKey(
-            jid,
-            int.parse(key.attributes['rid']! as String),
-            key.innerText(),
-            key.attributes['kex'] == 'true',
-          ),
-        );
+      if (jid != ourJidString) {
+        continue;
       }
+
+      keys.addAll(
+        keysElement.findTags('key').map(
+              (key) => omemo.EncryptedKey(
+                int.parse(key.attributes['rid']! as String),
+                key.innerText(),
+                key.attributes['kex'] == 'true',
+              ),
+            ),
+      );
     }
 
-    final ourJid = getAttributes().getFullJID();
     final sid = int.parse(header.attributes['sid']! as String);
-
-    final om = await getOmemoManager();
+    final om = await _getOmemoManager();
     final result = await om.onIncomingStanza(
-      OmemoIncomingStanza(
+      omemo.OmemoIncomingStanza(
         fromJid.toString(),
         sid,
-        state.delayedDelivery?.timestamp.millisecondsSinceEpoch ??
-            DateTime.now().millisecondsSinceEpoch,
         keys,
-        payloadElement?.innerText(),
+        encrypted.firstTag('payload')?.innerText(),
+        false,
       ),
     );
 
-    final other = Map<String, dynamic>.from(state.other);
     var children = stanza.children;
     if (result.error != null) {
-      other['encryption_error'] = result.error;
+      state.encryptionError = result.error;
     } else {
       children = stanza.children
           .where(
@@ -463,17 +468,16 @@ abstract class BaseOmemoManager extends XmppManagerBase {
           .toList();
     }
 
+    logger.finest('Got payload: ${result.payload != null}');
     if (result.payload != null) {
       XMLNode envelope;
       try {
         envelope = XMLNode.fromString(result.payload!);
       } on XmlParserException catch (_) {
         logger.warning('Failed to parse envelope payload: ${result.payload!}');
-        other['encryption_error'] = InvalidEnvelopePayloadException();
-        return state.copyWith(
-          encrypted: true,
-          other: other,
-        );
+        return state
+          ..encrypted = true
+          ..encryptionError = InvalidEnvelopePayloadException();
       }
 
       final envelopeChildren = envelope.firstTag('content')?.children;
@@ -482,18 +486,29 @@ abstract class BaseOmemoManager extends XmppManagerBase {
           // Do not add forbidden elements from the envelope
           envelopeChildren.where(shouldEncryptElement),
         );
+
+        logger.finest('Adding children: ${envelopeChildren.map((c) => c.tag)}');
       } else {
         logger.warning('Invalid envelope element: No <content /> element');
       }
 
       if (!checkAffixElements(envelope, stanza.from!, ourJid)) {
-        other['encryption_error'] = InvalidAffixElementsException();
+        state.encryptionError = InvalidAffixElementsException();
       }
     }
 
-    return state.copyWith(
-      encrypted: true,
-      stanza: Stanza(
+    // Ignore heartbeat messages
+    if (stanza.tag == 'message' && encrypted.firstTag('payload') == null) {
+      logger.finest('Received empty OMEMO message. Ending processing early.');
+      return state
+        ..encrypted = true
+        ..skip = true
+        ..done = true;
+    }
+
+    return state
+      ..encrypted = true
+      ..stanza = Stanza(
         to: stanza.to,
         from: stanza.from,
         id: stanza.id,
@@ -501,9 +516,13 @@ abstract class BaseOmemoManager extends XmppManagerBase {
         children: children,
         tag: stanza.tag,
         attributes: Map<String, String>.from(stanza.attributes),
-      ),
-      other: other,
-    );
+      )
+      ..extensions.set<OmemoData>(
+        OmemoData(
+          result.newRatchets,
+          result.replacedRatchets,
+        ),
+      );
   }
 
   /// Convenience function that attempts to retrieve the raw XML payload from the
@@ -514,10 +533,12 @@ abstract class BaseOmemoManager extends XmppManagerBase {
     JID jid,
   ) async {
     final pm = getAttributes().getManagerById<PubSubManager>(pubsubManager)!;
-    final result =
-        await pm.getItems(jid.toBare().toString(), omemoDevicesXmlns);
+    final result = await pm.getItems(jid.toBare(), omemoDevicesXmlns);
     if (result.isType<PubSubError>()) return Result(UnknownOmemoError());
-    return Result(result.get<List<PubSubItem>>().first.payload);
+
+    final itemList = result.get<List<PubSubItem>>();
+    if (itemList.isEmpty) return Result(EmptyDeviceListException());
+    return Result(itemList.first.payload);
   }
 
   /// Retrieves the OMEMO device list from [jid].
@@ -536,12 +557,12 @@ abstract class BaseOmemoManager extends XmppManagerBase {
   /// Retrieve all device bundles for the JID [jid].
   ///
   /// On success, returns a list of devices. On failure, returns am OmemoError.
-  Future<Result<OmemoError, List<OmemoBundle>>> retrieveDeviceBundles(
+  Future<Result<OmemoError, List<omemo.OmemoBundle>>> retrieveDeviceBundles(
     JID jid,
   ) async {
     // TODO(Unknown): Should we query the device list first?
     final pm = getAttributes().getManagerById<PubSubManager>(pubsubManager)!;
-    final bundlesRaw = await pm.getItems(jid.toString(), omemoBundlesXmlns);
+    final bundlesRaw = await pm.getItems(jid, omemoBundlesXmlns);
     if (bundlesRaw.isType<PubSubError>()) return Result(UnknownOmemoError());
 
     final bundles = bundlesRaw
@@ -557,12 +578,12 @@ abstract class BaseOmemoManager extends XmppManagerBase {
   /// Retrieves a bundle from entity [jid] with the device id [deviceId].
   ///
   /// On success, returns the device bundle. On failure, returns an OmemoError.
-  Future<Result<OmemoError, OmemoBundle>> retrieveDeviceBundle(
+  Future<Result<OmemoError, omemo.OmemoBundle>> retrieveDeviceBundle(
     JID jid,
     int deviceId,
   ) async {
     final pm = getAttributes().getManagerById<PubSubManager>(pubsubManager)!;
-    final bareJid = jid.toBare().toString();
+    final bareJid = jid.toBare();
     final item = await pm.getItem(bareJid, omemoBundlesXmlns, '$deviceId');
     if (item.isType<PubSubError>()) return Result(UnknownOmemoError());
 
@@ -573,7 +594,9 @@ abstract class BaseOmemoManager extends XmppManagerBase {
   /// nodes.
   ///
   /// On success, returns true. On failure, returns an OmemoError.
-  Future<Result<OmemoError, bool>> publishBundle(OmemoBundle bundle) async {
+  Future<Result<OmemoError, bool>> publishBundle(
+    omemo.OmemoBundle bundle,
+  ) async {
     final attrs = getAttributes();
     final pm = attrs.getManagerById<PubSubManager>(pubsubManager)!;
     final bareJid = attrs.getFullJID().toBare();
@@ -609,7 +632,7 @@ abstract class BaseOmemoManager extends XmppManagerBase {
       );
 
       final deviceListPublish = await pm.publish(
-        bareJid.toString(),
+        bareJid,
         omemoDevicesXmlns,
         newDeviceList,
         id: 'current',
@@ -621,7 +644,7 @@ abstract class BaseOmemoManager extends XmppManagerBase {
     }
 
     final deviceBundlePublish = await pm.publish(
-      bareJid.toString(),
+      bareJid,
       omemoBundlesXmlns,
       bundleToXML(bundle),
       id: '${bundle.id}',
@@ -637,7 +660,12 @@ abstract class BaseOmemoManager extends XmppManagerBase {
   /// Subscribes to the device list PubSub node of [jid].
   Future<void> subscribeToDeviceListImpl(String jid) async {
     final pm = getAttributes().getManagerById<PubSubManager>(pubsubManager)!;
-    await pm.subscribe(jid, omemoDevicesXmlns);
+    await pm.subscribe(JID.fromString(jid), omemoDevicesXmlns);
+  }
+
+  /// Implementation for publishing our device [device].
+  Future<void> publishDeviceImpl(omemo.OmemoDevice device) async {
+    await publishBundle(await device.toBundle());
   }
 
   /// Attempts to find out if [jid] supports omemo:2.
@@ -646,7 +674,7 @@ abstract class BaseOmemoManager extends XmppManagerBase {
   /// On failure, returns an OmemoError.
   Future<Result<OmemoError, bool>> supportsOmemo(JID jid) async {
     final dm = getAttributes().getManagerById<DiscoManager>(discoManager)!;
-    final items = await dm.discoItemsQuery(jid.toBare().toString());
+    final items = await dm.discoItemsQuery(jid.toBare());
 
     if (items.isType<DiscoError>()) return Result(UnknownOmemoError());
 
@@ -686,7 +714,7 @@ abstract class BaseOmemoManager extends XmppManagerBase {
           .toList(),
     );
     final publishResult = await pm.publish(
-      jid.toString(),
+      jid,
       omemoDevicesXmlns,
       newPayload,
       id: 'current',

packages/moxxmpp/lib/src/xeps/xep_0385.dart

@@ -5,9 +5,9 @@ import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/xeps/staging/extensible_file_thumbnails.dart';
+import 'package:moxxmpp/src/xeps/xep_0264.dart';
 
-class StatelessMediaSharingData {
+class StatelessMediaSharingData implements StanzaHandlerExtension {
   const StatelessMediaSharingData({
     required this.mediaType,
     required this.size,
@@ -20,7 +20,7 @@ class StatelessMediaSharingData {
   final int size;
   final String description;
   final Map<String, String> hashes; // algo -> hash value
-  final List<Thumbnail> thumbnails;
+  final List<JingleContentThumbnail> thumbnails;
 
   final String url;
 }
@@ -48,16 +48,11 @@ StatelessMediaSharingData parseSIMSElement(XMLNode node) {
     break;
   }
 
-  final thumbnails = List<Thumbnail>.empty(growable: true);
-  for (final child in file.children) {
-    // TODO(Unknown): Handle other thumbnails
-    if (child.tag == 'file-thumbnail' &&
-        child.attributes['xmlns'] == fileThumbnailsXmlns) {
-      final thumb = parseFileThumbnailElement(child);
-      if (thumb != null) {
-        thumbnails.add(thumb);
-      }
-    }
+  // Thumbnails
+  final thumbnails = List<JingleContentThumbnail>.empty(growable: true);
+  for (final i
+      in file.findTags('thumbnail', xmlns: jingleContentThumbnailXmlns)) {
+    thumbnails.add(JingleContentThumbnail.fromXML(i));
   }
 
   return StatelessMediaSharingData(
@@ -70,7 +65,9 @@ StatelessMediaSharingData parseSIMSElement(XMLNode node) {
   );
 }
 
+@Deprecated('Not maintained')
 class SIMSManager extends XmppManagerBase {
+  @Deprecated('Not maintained')
   SIMSManager() : super(simsManager);
 
   @override
@@ -85,7 +82,7 @@ class SIMSManager extends XmppManagerBase {
           tagXmlns: referenceXmlns,
           // Before the message handler
           priority: -99,
-        )
+        ),
       ];
 
   @override
@@ -98,7 +95,7 @@ class SIMSManager extends XmppManagerBase {
     final references = message.findTags('reference', xmlns: referenceXmlns);
     for (final ref in references) {
       final sims = ref.firstTag('media-sharing', xmlns: simsXmlns);
-      if (sims != null) return state.copyWith(sims: parseSIMSElement(sims));
+      if (sims != null) return state..extensions.set(parseSIMSElement(sims));
     }
 
     return state;

packages/moxxmpp/lib/src/xeps/xep_0386.dart

@@ -1,10 +1,10 @@
 import 'package:collection/collection.dart';
 import 'package:meta/meta.dart';
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0388/negotiators.dart';
 import 'package:moxxmpp/src/xeps/xep_0388/xep_0388.dart';
 

packages/moxxmpp/lib/src/xeps/xep_0388/negotiators.dart

@@ -1,7 +1,7 @@
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/rfcs/rfc_6120/sasl/negotiator.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 
 /// A special type of [XmppFeatureNegotiatorBase] that is aware of SASL2.
 abstract class Sasl2FeatureNegotiator extends XmppFeatureNegotiatorBase {

packages/moxxmpp/lib/src/xeps/xep_0388/user_agent.dart

@@ -1,6 +1,6 @@
 import 'package:moxxmpp/src/stringxml.dart';
 
-/// A data class describing the user agent. See https://dyn.eightysoft.de/final/xep-0388.html#initiation
+/// A data class describing the user agent. See https://xmpp.org/extensions/xep-0388.html#initiation.
 class UserAgent {
   const UserAgent({
     this.id,
@@ -24,11 +24,9 @@ class UserAgent {
     );
     return XMLNode(
       tag: 'user-agent',
-      attributes: id != null
-          ? {
-              'id': id,
-            }
-          : {},
+      attributes: {
+        if (id != null) 'id': id,
+      },
       children: [
         if (software != null)
           XMLNode(

packages/moxxmpp/lib/src/xeps/xep_0388/xep_0388.dart

@@ -1,10 +1,10 @@
+import 'package:moxlib/moxlib.dart';
 import 'package:moxxmpp/src/jid.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/rfcs/rfc_6120/sasl/errors.dart';
 import 'package:moxxmpp/src/stringxml.dart';
-import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0388/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0388/negotiators.dart';
 import 'package:moxxmpp/src/xeps/xep_0388/user_agent.dart';
@@ -20,12 +20,10 @@ enum Sasl2State {
 /// A negotiator that implements XEP-0388 SASL2. Alone, it does nothing. Has to be
 /// registered with other negotiators that register themselves against this one.
 class Sasl2Negotiator extends XmppFeatureNegotiatorBase {
-  Sasl2Negotiator({
-    this.userAgent,
-  }) : super(100, false, sasl2Xmlns, sasl2Negotiator);
+  Sasl2Negotiator() : super(100, false, sasl2Xmlns, sasl2Negotiator);
 
   /// The user agent data that will be sent to the server when authenticating.
-  final UserAgent? userAgent;
+  UserAgent? userAgent;
 
   /// List of callbacks that are registered against us. Will be called once we get
   /// SASL2 features.

packages/moxxmpp/lib/src/xeps/xep_0421.dart

@@ -0,0 +1,61 @@
+import 'dart:async';
+import 'package:moxxmpp/src/managers/base.dart';
+import 'package:moxxmpp/src/managers/data.dart';
+import 'package:moxxmpp/src/managers/handlers.dart';
+import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
+import 'package:moxxmpp/src/namespaces.dart';
+import 'package:moxxmpp/src/stanza.dart';
+import 'package:moxxmpp/src/stringxml.dart';
+
+/// Representation of a <occupant-id /> element.
+class OccupantIdData implements StanzaHandlerExtension {
+  const OccupantIdData(
+    this.id,
+  );
+
+  /// The unique occupant id.
+  final String id;
+
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'occupant-id',
+      xmlns: occupantIdXmlns,
+      attributes: {
+        'id': id,
+      },
+    );
+  }
+}
+
+class OccupantIdManager extends XmppManagerBase {
+  OccupantIdManager() : super(occupantIdManager);
+
+  @override
+  List<String> getDiscoFeatures() => [
+        occupantIdXmlns,
+      ];
+
+  @override
+  List<StanzaHandler> getIncomingStanzaHandlers() => [
+        StanzaHandler(
+          stanzaTag: 'message',
+          tagName: 'occupant-id',
+          tagXmlns: occupantIdXmlns,
+          callback: _onMessage,
+          // Before the MessageManager
+          priority: MessageManager.messageHandlerPriority + 1,
+        ),
+      ];
+
+  @override
+  Future<bool> isSupported() async => true;
+
+  Future<StanzaHandlerData> _onMessage(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
+    return state
+      ..extensions.set(OccupantIdData(stanza.attributes['id']! as String));
+  }
+}

packages/moxxmpp/lib/src/xeps/xep_0424.dart

@@ -2,12 +2,19 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
+import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
-class MessageRetractionData {
+class MessageRetractionData implements StanzaHandlerExtension {
   MessageRetractionData(this.id, this.fallback);
+
+  /// A potential fallback message to set the body to when retracting.
   final String? fallback;
+
+  /// The id of the message that is retracted.
   final String id;
 }
 
@@ -24,7 +31,7 @@ class MessageRetractionManager extends XmppManagerBase {
           callback: _onMessage,
           // Before the MessageManager
           priority: -99,
-        )
+        ),
       ];
 
   @override
@@ -47,11 +54,55 @@ class MessageRetractionManager extends XmppManagerBase {
     final isFallbackBody =
         message.firstTag('fallback', xmlns: fallbackIndicationXmlns) != null;
 
-    return state.copyWith(
-      messageRetraction: MessageRetractionData(
-        applyTo.attributes['id']! as String,
-        isFallbackBody ? message.firstTag('body')?.innerText() : null,
-      ),
-    );
+    return state
+      ..extensions.set(
+        MessageRetractionData(
+          applyTo.attributes['id']! as String,
+          isFallbackBody ? message.firstTag('body')?.innerText() : null,
+        ),
+      );
+  }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final data = extensions.get<MessageRetractionData>();
+    return data != null
+        ? [
+            XMLNode.xmlns(
+              tag: 'apply-to',
+              xmlns: fasteningXmlns,
+              attributes: <String, String>{
+                'id': data.id,
+              },
+              children: [
+                XMLNode.xmlns(
+                  tag: 'retract',
+                  xmlns: messageRetractionXmlns,
+                ),
+              ],
+            ),
+            if (data.fallback != null)
+              XMLNode(
+                tag: 'body',
+                text: data.fallback,
+              ),
+            if (data.fallback != null)
+              XMLNode.xmlns(
+                tag: 'fallback',
+                xmlns: fallbackIndicationXmlns,
+              ),
+          ]
+        : [];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0444.dart

@@ -2,16 +2,18 @@ import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
 import 'package:moxxmpp/src/managers/namespaces.dart';
+import 'package:moxxmpp/src/message.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
+import 'package:moxxmpp/src/util/typed_map.dart';
 
-class MessageReactions {
-  const MessageReactions(this.messageId, this.emojis);
+class MessageReactionsData implements StanzaHandlerExtension {
+  const MessageReactionsData(this.messageId, this.emojis);
   final String messageId;
   final List<String> emojis;
 
-  XMLNode toXml() {
+  XMLNode toXML() {
     return XMLNode.xmlns(
       tag: 'reactions',
       xmlns: messageReactionsXmlns,
@@ -55,14 +57,36 @@ class MessageReactionsManager extends XmppManagerBase {
   ) async {
     final reactionsElement =
         message.firstTag('reactions', xmlns: messageReactionsXmlns)!;
-    return state.copyWith(
-      messageReactions: MessageReactions(
-        reactionsElement.attributes['id']! as String,
-        reactionsElement.children
-            .where((c) => c.tag == 'reaction')
-            .map((c) => c.innerText())
-            .toList(),
-      ),
-    );
+    return state
+      ..extensions.set(
+        MessageReactionsData(
+          reactionsElement.attributes['id']! as String,
+          reactionsElement.children
+              .where((c) => c.tag == 'reaction')
+              .map((c) => c.innerText())
+              .toList(),
+        ),
+      );
+  }
+
+  List<XMLNode> _messageSendingCallback(
+    TypedMap<StanzaHandlerExtension> extensions,
+  ) {
+    final data = extensions.get<MessageReactionsData>();
+    return data != null
+        ? [
+            data.toXML(),
+          ]
+        : [];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    // Register the sending callback
+    getAttributes()
+        .getManagerById<MessageManager>(messageManager)
+        ?.registerMessageSendingCallback(_messageSendingCallback);
   }
 }