feat(docs): Add CONTRIBUTING.md

Fixes #26.

.github/FUNDING.yml

@@ -0,0 +1 @@
+ko_fi: papatutuwawa

.gitignore

@@ -13,3 +13,6 @@ pubspec.lock
 
 # Omit pubspec override files generated by melos
 **/pubspec_overrides.yaml
+
+# Flake results
+result

.gitlint

@@ -0,0 +1,14 @@
+[general]
+ignore=B5,B6,B7,B8
+
+[title-max-length]
+line-length=72
+
+[title-trailing-punctuation]
+[title-hard-tab]
+[title-match-regex]
+regex=^((feat|fix|chore|refactor|docs|release|test)\((meta|tests|style|docs|xep|core)+(,(meta|tests|style|docs|xep|core))*\)|release): [A-Z0-9].*$
+
+
+[body-trailing-whitespace]
+[body-first-line-empty]

.woodpecker.yml

@@ -0,0 +1,28 @@
+pipeline:
+  # Check moxxmpp
+  moxxmpp-lint:
+    image: dart:2.18.1
+    commands:
+      - cd packages/moxxmpp
+      - dart pub get
+      - dart analyze --fatal-infos --fatal-warnings
+  moxxmpp-test:
+    image: dart:2.18.1
+    commands:
+      - cd packages/moxxmpp
+      - dart pub get
+      - dart test
+
+  # Check moxxmpp_socket_tcp
+  moxxmpp_socket_tcp-lint:
+    image: dart:2.18.1
+    commands:
+      - cd packages/moxxmpp_socket_tcp
+      - dart pub get
+      - dart analyze --fatal-infos --fatal-warnings
+  # moxxmpp-test:
+  #   image: dart:2.18.1
+  #   commands:
+  #     - cd packages/moxxmpp
+  #     - dart pub get
+  #     - dart test

CONTRIBUTING.md

@@ -0,0 +1,19 @@
+# Contribution Guide
+
+Thanks for your interest in the moxxmpp XMPP library! This document contains guidelines and guides for working on the moxxmpp codebase.
+
+## Contributing
+
+If you want to fix a small issue, you can just fork, create a new branch, and start working right away. However, if you want to work
+on a bigger feature, please first create an issue (if an issue does not already exist) or join the [development chat](xmpp:moxxy@muc.moxxy.org?join) (xmpp:moxxy@muc.moxxy.org?join)
+to discuss the feature first.
+
+Before creating a pull request, please make sure you checked every item on the following checklist:
+
+- [ ] I formatted the code with the dart formatter (`dart format`) before running the linter
+- [ ] I ran the linter (`dart analyze`) and introduced no new linter warnings
+- [ ] I ran the tests (`dart test`) and introduced no new failing tests
+- [ ] I used [gitlint](https://github.com/jorisroovers/gitlint) to ensure propper formatting of my commig messages
+
+If you think that your code is ready for a pull request, but you are not sure if it is ready, prefix the PR's title with "WIP: ", so that discussion
+can happen there. If you think your PR is ready for review, remove the "WIP: " prefix.

README.md

@@ -3,13 +3,15 @@
 moxxmpp is a XMPP library written purely in Dart for usage in Moxxy.
 
 ## Packages
-### moxxmpp
+### [moxxmpp](./packages/moxxmpp)
 
 This package contains the actual XMPP code that is platform-independent.
 
-### moxxmpp_socket
+Documentation is available [here](https://moxxy.org/developers/docs/moxxmpp/).
 
-`moxxmpp_socket` contains the implementation of the `BaseSocketWrapper` class that
+### [moxxmpp_socket_tcp](./packages/moxxmpp_socket_tcp)
+
+`moxxmpp_socket_tcp` contains the implementation of the `BaseSocketWrapper` class that
 implements the RFC6120 connection algorithm and XEP-0368 direct TLS connections,
 if a DNS implementation is given, and supports StartTLS.
 
@@ -25,3 +27,9 @@ the development shell provided by the NixOS Flake, ensure that `ANDROID_HOME` an
 ## License
 
 See `./LICENSE`.
+
+## Support
+
+If you like what I do and you want to support me, feel free to donate to me on Ko-Fi.
+
+[<img src="https://codeberg.org/moxxy/moxxyv2/raw/branch/master/assets/repo/kofi.png" height="36" style="height: 36px; border: 0px;"></img>](https://ko-fi.com/papatutuwawa)

flake.lock

@@ -17,16 +17,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1667610399,
+        "lastModified": 1676076353,
-        "narHash": "sha256-XZd0f4ZWAY0QOoUSdiNWj/eFiKb4B9CJPtl9uO9SYY4=",
+        "narHash": "sha256-mdUtE8Tp40cZETwcq5tCwwLqkJVV1ULJQ5GKRtbshag=",
-        "owner": "NixOS",
+        "owner": "AtaraxiaSjel",
         "repo": "nixpkgs",
-        "rev": "1dd8696f96db47156e1424a49578fe7dd4ce99a4",
+        "rev": "5deb99bdccbbb97e7562dee4ba8a3ee3021688e6",
         "type": "github"
       },
       "original": {
-        "owner": "NixOS",
+        "owner": "AtaraxiaSjel",
-        "ref": "nixpkgs-unstable",
+        "ref": "update/flutter",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "moxxmpp";
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    nixpkgs.url = "github:AtaraxiaSjel/nixpkgs/update/flutter";
     flake-utils.url = "github:numtide/flake-utils";
   };
 
@@ -30,14 +30,29 @@
       useGoogleTVAddOns = false;
     };
     pinnedJDK = pkgs.jdk;
+
+    pythonEnv = pkgs.python3.withPackages (ps: with ps; [
+      pyyaml
+      requests
+    ]);
+
+    moxxmppPubCache = import ./nix/pubcache.moxxmpp.nix {
+      inherit (pkgs) fetchzip runCommand;
+    };
   in {
+    packages = {
+      moxxmppDartDocs = pkgs.callPackage ./nix/moxxmpp-docs.nix {
+        inherit (moxxmppPubCache) pubCache;
+      };
+    };
+
     devShell = pkgs.mkShell {
       buildInputs = with pkgs; [
-        flutter pinnedJDK android.platform-tools dart # Flutter/Android
+        flutter pinnedJDK android.platform-tools dart # Dart
 	      gitlint # Code hygiene
 	      ripgrep # General utilities 
 
-        # Flutter dependencies for linux desktop
+        # Flutter dependencies for Linux desktop
         atk
         cairo
         clang
@@ -53,6 +68,9 @@
         pkg-config
         xorg.libX11
         xorg.xorgproto
+
+        # For the scripts in ./scripts/
+        pythonEnv
       ];
 
       CPATH = "${pkgs.xorg.libX11.dev}/include:${pkgs.xorg.xorgproto}/include";

nix/moxxmpp-docs.nix

@@ -0,0 +1,35 @@
+{
+  stdenv
+, pubCache
+, dart
+, lib
+}:
+
+stdenv.mkDerivation {
+  pname = "moxxmpp-docs";
+  version = "0.2.0";
+
+  PUB_CACHE = "${pubCache}";
+  
+  src = "${./..}/packages/moxxmpp";
+
+  buildPhase = ''
+    runHook preBuild
+
+    (
+    set -x
+    echo $PUB_CACHE
+    ${dart}/bin/dart pub get --no-precompile --offline
+    )
+
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    ${dart}/bin/dart doc -o $out
+
+    runHook postInstall
+  '';
+}

nix/moxxmpp.lock

@@ -0,0 +1,730 @@
+packages:
+  _fe_analyzer_shared:
+    archive_url: https://pub.dartlang.org/packages/_fe_analyzer_shared/versions/50.0.0.tar.gz
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      url: https://pub.dartlang.org
+    sha256: 1hyd5pmjcfyvfwhsc0wq6k0229abmqq5zn95g31hh42bklb2gci5
+    source: hosted
+    version: 50.0.0
+  analyzer:
+    archive_url: https://pub.dartlang.org/packages/analyzer/versions/5.2.0.tar.gz
+    dependency: transitive
+    description:
+      name: analyzer
+      url: https://pub.dartlang.org
+    sha256: 0niy5b3w39aywpjpw5a84pxdilhh3zzv1c22x8ywml756pybmj4r
+    source: hosted
+    version: 5.2.0
+  args:
+    archive_url: https://pub.dartlang.org/packages/args/versions/2.3.1.tar.gz
+    dependency: transitive
+    description:
+      name: args
+      url: https://pub.dartlang.org
+    sha256: 0c78zkzg2d2kzw1qrpiyrj1qvm4pr0yhnzapbqk347m780ha408g
+    source: hosted
+    version: 2.3.1
+  async:
+    archive_url: https://pub.dartlang.org/packages/async/versions/2.10.0.tar.gz
+    dependency: transitive
+    description:
+      name: async
+      url: https://pub.dartlang.org
+    sha256: 00hhylamsjcqmcbxlsrfimri63gb384l31r9mqvacn6c6bvk4yfx
+    source: hosted
+    version: 2.10.0
+  boolean_selector:
+    archive_url: https://pub.dartlang.org/packages/boolean_selector/versions/2.1.1.tar.gz
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: https://pub.dartlang.org
+    sha256: 0hxq8072hb89q9s91xlz9fvrjxfy7hw6jkdwkph5dp77df841kmj
+    source: hosted
+    version: 2.1.1
+  build:
+    archive_url: https://pub.dartlang.org/packages/build/versions/2.3.1.tar.gz
+    dependency: transitive
+    description:
+      name: build
+      url: https://pub.dartlang.org
+    sha256: 1x6nkii6kqy6y7ck0151yfhc9lp2nvbhznnhdi2mxr8afk6jxigd
+    source: hosted
+    version: 2.3.1
+  build_config:
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+    dependency: transitive
+    description:
+      name: build_config
+      url: https://pub.dartlang.org
+    sha256: 092rrbhbdy9fk50jqb1fwj1sfk415fi43irvsd0hk5w90gn8vazj
+    source: hosted
+    version: 1.1.1
+  build_daemon:
+    archive_url: https://pub.dartlang.org/packages/build_daemon/versions/3.1.0.tar.gz
+    dependency: transitive
+    description:
+      name: build_daemon
+      url: https://pub.dartlang.org
+    sha256: 0b6hnwjc3gi5g7cnpy8xyiqigcrs0xp51c7y7v1pqn9v75g25w6j
+    source: hosted
+    version: 3.1.0
+  build_resolvers:
+    archive_url: https://pub.dartlang.org/packages/build_resolvers/versions/2.1.0.tar.gz
+    dependency: transitive
+    description:
+      name: build_resolvers
+      url: https://pub.dartlang.org
+    sha256: 0fnrisgq6rnvbqsf8v43hb11kr1qq6azrxbsvx3wwimd37nxx8m5
+    source: hosted
+    version: 2.1.0
+  build_runner:
+    archive_url: https://pub.dartlang.org/packages/build_runner/versions/2.3.2.tar.gz
+    dependency: direct dev
+    description:
+      name: build_runner
+      url: https://pub.dartlang.org
+    sha256: 0246bxl9rxgil55fhfzi7csd9a56blj9s1j1z79717hiyzsr60x6
+    source: hosted
+    version: 2.3.2
+  build_runner_core:
+    archive_url: https://pub.dartlang.org/packages/build_runner_core/versions/7.2.7.tar.gz
+    dependency: transitive
+    description:
+      name: build_runner_core
+      url: https://pub.dartlang.org
+    sha256: 0bpil0fw0dag3vbnin9p945ymi7xjgkiy7jrq9j52plljf7cnf5z
+    source: hosted
+    version: 7.2.7
+  built_collection:
+    archive_url: https://pub.dartlang.org/packages/built_collection/versions/5.1.1.tar.gz
+    dependency: transitive
+    description:
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+      url: https://pub.dartlang.org
+    sha256: 0bqjahxr42q84w91nhv3n4cr580l3s3ffx3vgzyyypgqnrck0hv3
+    source: hosted
+    version: 5.1.1
+  built_value:
+    archive_url: https://pub.dartlang.org/packages/built_value/versions/8.4.2.tar.gz
+    dependency: transitive
+    description:
+      name: built_value
+      url: https://pub.dartlang.org
+    sha256: 0sslr4258snvcj8qhbdk6wapka174als0viyxddwqlnhs7dlci8i
+    source: hosted
+    version: 8.4.2
+  checked_yaml:
+    archive_url: https://pub.dartlang.org/packages/checked_yaml/versions/2.0.1.tar.gz
+    dependency: transitive
+    description:
+      name: checked_yaml
+      url: https://pub.dartlang.org
+    sha256: 1gf7ankc5jb7mk17br87ajv05pfg6vb8nf35ay6c35w8jp70ra7k
+    source: hosted
+    version: 2.0.1
+  code_builder:
+    archive_url: https://pub.dartlang.org/packages/code_builder/versions/4.3.0.tar.gz
+    dependency: transitive
+    description:
+      name: code_builder
+      url: https://pub.dartlang.org
+    sha256: 1vl9dl23yd0zjw52ndrazijs6dw83fg1rvyb2gfdpd6n1lj9nbhg
+    source: hosted
+    version: 4.3.0
+  collection:
+    archive_url: https://pub.dartlang.org/packages/collection/versions/1.17.0.tar.gz
+    dependency: direct main
+    description:
+      name: collection
+      url: https://pub.dartlang.org
+    sha256: 1iyl3v3j7mj3sxjf63b1kc182fwrwd04mjp5x2i61hic8ihfw545
+    source: hosted
+    version: 1.17.0
+  convert:
+    archive_url: https://pub.dartlang.org/packages/convert/versions/3.1.1.tar.gz
+    dependency: transitive
+    description:
+      name: convert
+      url: https://pub.dartlang.org
+    sha256: 0adsigjk3l1c31i6k91p28dqyjlgwiqrs4lky5djrm2scf8k6cri
+    source: hosted
+    version: 3.1.1
+  coverage:
+    archive_url: https://pub.dartlang.org/packages/coverage/versions/1.6.1.tar.gz
+    dependency: transitive
+    description:
+      name: coverage
+      url: https://pub.dartlang.org
+    sha256: 0akbg1yp2h4vprc8r9xvrpgvp5d26h7m80h5sbzgr5dlis1bcw0d
+    source: hosted
+    version: 1.6.1
+  crypto:
+    archive_url: https://pub.dartlang.org/packages/crypto/versions/3.0.2.tar.gz
+    dependency: transitive
+    description:
+      name: crypto
+      url: https://pub.dartlang.org
+    sha256: 1kjfb8fvdxazmv9ps2iqdhb8kcr31115h0nwn6v4xmr71k8jb8ds
+    source: hosted
+    version: 3.0.2
+  cryptography:
+    archive_url: https://pub.dartlang.org/packages/cryptography/versions/2.0.5.tar.gz
+    dependency: direct main
+    description:
+      name: cryptography
+      url: https://pub.dartlang.org
+    sha256: 0jqph45d9lbhdakprnb84c3qhk4aq05hhb1pmn8w23yhl41ypijs
+    source: hosted
+    version: 2.0.5
+  dart_style:
+    archive_url: https://pub.dartlang.org/packages/dart_style/versions/2.2.4.tar.gz
+    dependency: transitive
+    description:
+      name: dart_style
+      url: https://pub.dartlang.org
+    sha256: 01wg15kalbjlh4i3xbawc9zk8yrk28qhak7xp7mlwn2syhdckn7v
+    source: hosted
+    version: 2.2.4
+  file:
+    archive_url: https://pub.dartlang.org/packages/file/versions/6.1.4.tar.gz
+    dependency: transitive
+    description:
+      name: file
+      url: https://pub.dartlang.org
+    sha256: 0ajcfblf8d4dicp1sgzkbrhd0b0v0d8wl70jsnf5drjck3p3ppk7
+    source: hosted
+    version: 6.1.4
+  fixnum:
+    archive_url: https://pub.dartlang.org/packages/fixnum/versions/1.0.1.tar.gz
+    dependency: transitive
+    description:
+      name: fixnum
+      url: https://pub.dartlang.org
+    sha256: 1m8cdfqp9d6w1cik3fwz9bai1wf9j11rjv2z0zlv7ich87q9kkjk
+    source: hosted
+    version: 1.0.1
+  freezed:
+    archive_url: https://pub.dartlang.org/packages/freezed/versions/2.1.1.tar.gz
+    dependency: direct main
+    description:
+      name: freezed
+      url: https://pub.dartlang.org
+    sha256: 1i9s4djf4vlz56zqn8brcck3n7sk07qay23wmaan991cqydd10iq
+    source: hosted
+    version: 2.1.1
+  freezed_annotation:
+    archive_url: https://pub.dartlang.org/packages/freezed_annotation/versions/2.1.0.tar.gz
+    dependency: direct main
+    description:
+      name: freezed_annotation
+      url: https://pub.dartlang.org
+    sha256: 0ym120dh1lpfnb68gxh1finm8p9l445q5x10aw8269y469b9k9z3
+    source: hosted
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+  frontend_server_client:
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+    dependency: transitive
+    description:
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+      url: https://pub.dartlang.org
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+  glob:
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+    dependency: transitive
+    description:
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+  graphs:
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+    dependency: transitive
+    description:
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+      url: https://pub.dartlang.org
+    sha256: 0cr6dgs1a7ln2ir5gd0kiwpn787lk4dwhqfjv8876hkkr1rv80m9
+    source: hosted
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+  hex:
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+    dependency: direct main
+    description:
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+    dependency: transitive
+    description:
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+    dependency: transitive
+    description:
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+  io:
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+    dependency: transitive
+    description:
+      name: io
+      url: https://pub.dartlang.org
+    sha256: 1bp5l8hkrp6fjj7zw9af51hxyp52sjspc5558lq0lmi453l0czni
+    source: hosted
+    version: 1.0.3
+  js:
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+    dependency: transitive
+    description:
+      name: js
+      url: https://pub.dartlang.org
+    sha256: 13fbxgyg1v6bmzvxamg6494vk3923fn3mgxj6f4y476aqwk99n50
+    source: hosted
+    version: 0.6.5
+  json_annotation:
+    archive_url: https://pub.dartlang.org/packages/json_annotation/versions/4.7.0.tar.gz
+    dependency: transitive
+    description:
+      name: json_annotation
+      url: https://pub.dartlang.org
+    sha256: 1p9nvn33psx2zbalhyqjw8gr4agd76jj5jq0fdz0i584c7l77bby
+    source: hosted
+    version: 4.7.0
+  json_serializable:
+    archive_url: https://pub.dartlang.org/packages/json_serializable/versions/6.5.4.tar.gz
+    dependency: direct main
+    description:
+      name: json_serializable
+      url: https://pub.dartlang.org
+    sha256: 04d7laaxrbiybcgbv3y223hy8d6n9f84h5lv9sv79zd9ffzkb2hg
+    source: hosted
+    version: 6.5.4
+  logging:
+    archive_url: https://pub.dartlang.org/packages/logging/versions/1.0.2.tar.gz
+    dependency: direct main
+    description:
+      name: logging
+      url: https://pub.dartlang.org
+    sha256: 0hl1mjh662c44ci7z60x92i0jsyqg1zm6k6fc89n9pdcxsqdpwfs
+    source: hosted
+    version: 1.0.2
+  matcher:
+    archive_url: https://pub.dartlang.org/packages/matcher/versions/0.12.13.tar.gz
+    dependency: transitive
+    description:
+      name: matcher
+      url: https://pub.dartlang.org
+    sha256: 0pjgc38clnjbv124n8bh724db1wcc4kk125j7dxl0icz7clvm0p0
+    source: hosted
+    version: 0.12.13
+  meta:
+    archive_url: https://pub.dartlang.org/packages/meta/versions/1.8.0.tar.gz
+    dependency: direct main
+    description:
+      name: meta
+      url: https://pub.dartlang.org
+    sha256: 01kqdd25nln5a219pr94s66p27m0kpqz0wpmwnm24kdy3ngif1v5
+    source: hosted
+    version: 1.8.0
+  mime:
+    archive_url: https://pub.dartlang.org/packages/mime/versions/1.0.2.tar.gz
+    dependency: transitive
+    description:
+      name: mime
+      url: https://pub.dartlang.org
+    sha256: 1dr3qikzvp10q1saka7azki5gk2kkf2v7k9wfqjsyxmza2zlv896
+    source: hosted
+    version: 1.0.2
+  moxlib:
+    archive_url: https://git.polynom.me/api/packages/moxxy/pub/api/packages/moxlib/files/0.1.5.tar.gz
+    dependency: direct main
+    description:
+      name: moxlib
+      url: https://git.polynom.me/api/packages/Moxxy/pub/
+    sha256: 1j52xglpwy8c7dbylc3f6vrh0p52xhhwqs4h0qcqk8c1rvjn5czq
+    source: hosted
+    version: 0.1.5
+  node_preamble:
+    archive_url: https://pub.dartlang.org/packages/node_preamble/versions/2.0.1.tar.gz
+    dependency: transitive
+    description:
+      name: node_preamble
+      url: https://pub.dartlang.org
+    sha256: 0i0gfc2yqa09182vc01lj47qpq98kfm9m8h4n8c5fby0mjd0lvyx
+    source: hosted
+    version: 2.0.1
+  omemo_dart:
+    archive_url: https://git.polynom.me/api/packages/PapaTutuWawa/pub/api/packages/omemo_dart/files/0.4.3.tar.gz
+    dependency: direct main
+    description:
+      name: omemo_dart
+      url: https://git.polynom.me/api/packages/PapaTutuWawa/pub/
+    sha256: 09x3jqa11hjdjp31nxnz91j6jssbc2f8a1lh44fmkc0d79hs8bbi
+    source: hosted
+    version: 0.4.3
+  package_config:
+    archive_url: https://pub.dartlang.org/packages/package_config/versions/2.1.0.tar.gz
+    dependency: transitive
+    description:
+      name: package_config
+      url: https://pub.dartlang.org
+    sha256: 1d4l0i4cby344zj45f5shrg2pkw1i1jn03kx0qqh0l7gh1ha7bpc
+    source: hosted
+    version: 2.1.0
+  path:
+    archive_url: https://pub.dartlang.org/packages/path/versions/1.8.2.tar.gz
+    dependency: transitive
+    description:
+      name: path
+      url: https://pub.dartlang.org
+    sha256: 16ggdh29ciy7h8sdshhwmxn6dd12sfbykf2j82c56iwhhlljq181
+    source: hosted
+    version: 1.8.2
+  pedantic:
+    archive_url: https://pub.dartlang.org/packages/pedantic/versions/1.11.1.tar.gz
+    dependency: transitive
+    description:
+      name: pedantic
+      url: https://pub.dartlang.org
+    sha256: 10ch0h3hi6cfwiz2ihfkh6m36m75c0m7fd0wwqaqggffsj2dn8ad
+    source: hosted
+    version: 1.11.1
+  petitparser:
+    archive_url: https://pub.dartlang.org/packages/petitparser/versions/5.1.0.tar.gz
+    dependency: transitive
+    description:
+      name: petitparser
+      url: https://pub.dartlang.org
+    sha256: 1pqqqqiy9ald24qsi24q9qrr0zphgpsrnrv9rlx4vwr6xak7d8c0
+    source: hosted
+    version: 5.1.0
+  pinenacl:
+    archive_url: https://pub.dartlang.org/packages/pinenacl/versions/0.5.1.tar.gz
+    dependency: transitive
+    description:
+      name: pinenacl
+      url: https://pub.dartlang.org
+    sha256: 0didjgva658z90hbcmhd0y8w1b8v86dp6gabfhylnw1aixl47cxg
+    source: hosted
+    version: 0.5.1
+  pool:
+    archive_url: https://pub.dartlang.org/packages/pool/versions/1.5.1.tar.gz
+    dependency: transitive
+    description:
+      name: pool
+      url: https://pub.dartlang.org
+    sha256: 0wmzs46hjszv3ayhr1p5l7xza7q9rkg2q9z4swmhdqmhlz3c50x4
+    source: hosted
+    version: 1.5.1
+  pub_semver:
+    archive_url: https://pub.dartlang.org/packages/pub_semver/versions/2.1.2.tar.gz
+    dependency: transitive
+    description:
+      name: pub_semver
+      url: https://pub.dartlang.org
+    sha256: 1vsj5c1f2dza4l5zmjix4zh65lp8gsg6pw01h57pijx2id0g4bwi
+    source: hosted
+    version: 2.1.2
+  pubspec_parse:
+    archive_url: https://pub.dartlang.org/packages/pubspec_parse/versions/1.2.1.tar.gz
+    dependency: transitive
+    description:
+      name: pubspec_parse
+      url: https://pub.dartlang.org
+    sha256: 19dmr9k4wsqjnhlzp1lbrw8dv7a1gnwmr8l5j9zlw407rmfg20d1
+    source: hosted
+    version: 1.2.1
+  random_string:
+    archive_url: https://pub.dartlang.org/packages/random_string/versions/2.3.1.tar.gz
+    dependency: direct main
+    description:
+      name: random_string
+      url: https://pub.dartlang.org
+    sha256: 11cjiv75sgldvk3x7w6j77lgi08r6737wm94m3ylabylsr6zdyff
+    source: hosted
+    version: 2.3.1
+  saslprep:
+    archive_url: https://pub.dartlang.org/packages/saslprep/versions/1.0.2.tar.gz
+    dependency: direct main
+    description:
+      name: saslprep
+      url: https://pub.dartlang.org
+    sha256: 04lss0xvm6p801p8306jdxg7k0b28kr6n65dz2f57dkca237kcw7
+    source: hosted
+    version: 1.0.2
+  shelf:
+    archive_url: https://pub.dartlang.org/packages/shelf/versions/1.4.0.tar.gz
+    dependency: transitive
+    description:
+      name: shelf
+      url: https://pub.dartlang.org
+    sha256: 0x2xl7glrnq0hdxpy2i94a4wxbdrd6dm46hvhzgjn8alsm8z0wz1
+    source: hosted
+    version: 1.4.0
+  shelf_packages_handler:
+    archive_url: https://pub.dartlang.org/packages/shelf_packages_handler/versions/3.0.1.tar.gz
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      url: https://pub.dartlang.org
+    sha256: 199rbdbifj46lg3iynznnsbs8zr4dfcw0s7wan8v73nvpqvli82q
+    source: hosted
+    version: 3.0.1
+  shelf_static:
+    archive_url: https://pub.dartlang.org/packages/shelf_static/versions/1.1.1.tar.gz
+    dependency: transitive
+    description:
+      name: shelf_static
+      url: https://pub.dartlang.org
+    sha256: 1kqbaslz7bna9lldda3ibrjg0gczbzlwgm9cic8shg0bnl0v3s34
+    source: hosted
+    version: 1.1.1
+  shelf_web_socket:
+    archive_url: https://pub.dartlang.org/packages/shelf_web_socket/versions/1.0.3.tar.gz
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      url: https://pub.dartlang.org
+    sha256: 0rr87nx2wdf9alippxiidqlgi82fbprnsarr1jswg9qin0yy4jpn
+    source: hosted
+    version: 1.0.3
+  source_gen:
+    archive_url: https://pub.dartlang.org/packages/source_gen/versions/1.2.6.tar.gz
+    dependency: transitive
+    description:
+      name: source_gen
+      url: https://pub.dartlang.org
+    sha256: 1kxgx782lzpjhv736h0pz3lnxpcgiy05h0ysy0q77gix8q09i1hz
+    source: hosted
+    version: 1.2.6
+  source_helper:
+    archive_url: https://pub.dartlang.org/packages/source_helper/versions/1.3.3.tar.gz
+    dependency: transitive
+    description:
+      name: source_helper
+      url: https://pub.dartlang.org
+    sha256: 044kzmzlfpx93s4raz5avijahizmvai0zvl0lbm4wi93ynhdp1pd
+    source: hosted
+    version: 1.3.3
+  source_map_stack_trace:
+    archive_url: https://pub.dartlang.org/packages/source_map_stack_trace/versions/2.1.1.tar.gz
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      url: https://pub.dartlang.org
+    sha256: 0b5d4c5n5qd3j8n10gp1khhr508wfl3819bhk6xnl34qxz8n032k
+    source: hosted
+    version: 2.1.1
+  source_maps:
+    archive_url: https://pub.dartlang.org/packages/source_maps/versions/0.10.11.tar.gz
+    dependency: transitive
+    description:
+      name: source_maps
+      url: https://pub.dartlang.org
+    sha256: 18ixrlz3l2alk3hp0884qj0mcgzhxmjpg6nq0n1200pfy62pc4z6
+    source: hosted
+    version: 0.10.11
+  source_span:
+    archive_url: https://pub.dartlang.org/packages/source_span/versions/1.9.1.tar.gz
+    dependency: transitive
+    description:
+      name: source_span
+      url: https://pub.dartlang.org
+    sha256: 1lq4sy7lw15qsv9cijf6l48p16qr19r7njzwr4pxn8vv1kh6rb86
+    source: hosted
+    version: 1.9.1
+  stack_trace:
+    archive_url: https://pub.dartlang.org/packages/stack_trace/versions/1.11.0.tar.gz
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: https://pub.dartlang.org
+    sha256: 0bggqvvpkrfvqz24bnir4959k0c45azc3zivk4lyv3mvba6092na
+    source: hosted
+    version: 1.11.0
+  stream_channel:
+    archive_url: https://pub.dartlang.org/packages/stream_channel/versions/2.1.1.tar.gz
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: https://pub.dartlang.org
+    sha256: 054by84c60yxphr3qgg6f82gg6d22a54aqjp265anlm8dwz1ji32
+    source: hosted
+    version: 2.1.1
+  stream_transform:
+    archive_url: https://pub.dartlang.org/packages/stream_transform/versions/2.1.0.tar.gz
+    dependency: transitive
+    description:
+      name: stream_transform
+      url: https://pub.dartlang.org
+    sha256: 0jq6767v9ds17i2nd6mdd9i0f7nvsgg3dz74d0v54x66axjgr0gp
+    source: hosted
+    version: 2.1.0
+  string_scanner:
+    archive_url: https://pub.dartlang.org/packages/string_scanner/versions/1.2.0.tar.gz
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: https://pub.dartlang.org
+    sha256: 0p1r0v2923avwfg03rk0pmc6f21m0zxpcx6i57xygd25k6hdfi00
+    source: hosted
+    version: 1.2.0
+  synchronized:
+    archive_url: https://pub.dartlang.org/packages/synchronized/versions/3.0.0%2B2.tar.gz
+    dependency: direct main
+    description:
+      name: synchronized
+      url: https://pub.dartlang.org
+    sha256: 1j6108cq1hbcqpwhk9sah8q3gcidd7222bzhha2nk9syxhzqy82i
+    source: hosted
+    version: 3.0.0+2
+  term_glyph:
+    archive_url: https://pub.dartlang.org/packages/term_glyph/versions/1.2.1.tar.gz
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: https://pub.dartlang.org
+    sha256: 1x8nspxaccls0sxjamp703yp55yxdvhj6wg21lzwd296i9rwlxh9
+    source: hosted
+    version: 1.2.1
+  test:
+    archive_url: https://pub.dartlang.org/packages/test/versions/1.22.0.tar.gz
+    dependency: direct dev
+    description:
+      name: test
+      url: https://pub.dartlang.org
+    sha256: 08kimbjvkdw3bkj7za36p3yqdr8dnlb5v30c250kvdncb7k09h4x
+    source: hosted
+    version: 1.22.0
+  test_api:
+    archive_url: https://pub.dartlang.org/packages/test_api/versions/0.4.16.tar.gz
+    dependency: transitive
+    description:
+      name: test_api
+      url: https://pub.dartlang.org
+    sha256: 0mfyjpqkkmaqdh7xygrydx12591wq9ll816f61n80dc6rmkdx7px
+    source: hosted
+    version: 0.4.16
+  test_core:
+    archive_url: https://pub.dartlang.org/packages/test_core/versions/0.4.20.tar.gz
+    dependency: transitive
+    description:
+      name: test_core
+      url: https://pub.dartlang.org
+    sha256: 1r8dnvkxxvh55z1c8lrsja1m0dkf5i4lgwwqixcx0mqvxx5w3005
+    source: hosted
+    version: 0.4.20
+  timing:
+    archive_url: https://pub.dartlang.org/packages/timing/versions/1.0.0.tar.gz
+    dependency: transitive
+    description:
+      name: timing
+      url: https://pub.dartlang.org
+    sha256: 0a02znvy0fbzr0n4ai67pp8in7w6m768aynkk1kp5lnmgy17ppsg
+    source: hosted
+    version: 1.0.0
+  typed_data:
+    archive_url: https://pub.dartlang.org/packages/typed_data/versions/1.3.1.tar.gz
+    dependency: transitive
+    description:
+      name: typed_data
+      url: https://pub.dartlang.org
+    sha256: 1x402bvyzdmdvmyqhyfamjxf54p9j8sa8ns2n5dwsdhnfqbw859g
+    source: hosted
+    version: 1.3.1
+  unorm_dart:
+    archive_url: https://pub.dartlang.org/packages/unorm_dart/versions/0.2.0.tar.gz
+    dependency: transitive
+    description:
+      name: unorm_dart
+      url: https://pub.dartlang.org
+    sha256: 05kyk2764yz14pzgx00i7h5b1lzh8kjqnxspfzyf8z920bcgbz0v
+    source: hosted
+    version: 0.2.0
+  uuid:
+    archive_url: https://pub.dartlang.org/packages/uuid/versions/3.0.5.tar.gz
+    dependency: direct main
+    description:
+      name: uuid
+      url: https://pub.dartlang.org
+    sha256: 12lsynr07lw9848jknmzxvzn3ia12xdj07iiva0vg0qjvpq7ladg
+    source: hosted
+    version: 3.0.5
+  very_good_analysis:
+    archive_url: https://pub.dartlang.org/packages/very_good_analysis/versions/3.1.0.tar.gz
+    dependency: direct dev
+    description:
+      name: very_good_analysis
+      url: https://pub.dartlang.org
+    sha256: 1p2dh8aahbqyyqfzbsxswafgxnmxgisjq2xfp008skyh7imk6sz4
+    source: hosted
+    version: 3.1.0
+  vm_service:
+    archive_url: https://pub.dartlang.org/packages/vm_service/versions/9.4.0.tar.gz
+    dependency: transitive
+    description:
+      name: vm_service
+      url: https://pub.dartlang.org
+    sha256: 05xaxaxzyfls6jklw1hzws2jmina1cjk10gbl7a63djh1ghnzjb5
+    source: hosted
+    version: 9.4.0
+  watcher:
+    archive_url: https://pub.dartlang.org/packages/watcher/versions/1.0.2.tar.gz
+    dependency: transitive
+    description:
+      name: watcher
+      url: https://pub.dartlang.org
+    sha256: 1sk7gvwa7s0h4l652qrgbh7l8wyqc6nr6lki8m4rj55720p0fnyg
+    source: hosted
+    version: 1.0.2
+  web_socket_channel:
+    archive_url: https://pub.dartlang.org/packages/web_socket_channel/versions/2.2.0.tar.gz
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      url: https://pub.dartlang.org
+    sha256: 147amn05v1f1a1grxjr7yzgshrczjwijwiywggsv6dgic8kxyj5a
+    source: hosted
+    version: 2.2.0
+  webkit_inspection_protocol:
+    archive_url: https://pub.dartlang.org/packages/webkit_inspection_protocol/versions/1.2.0.tar.gz
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      url: https://pub.dartlang.org
+    sha256: 0z400dzw7gf68a3wm95xi2mf461iigkyq6x69xgi7qs3fvpmn3hx
+    source: hosted
+    version: 1.2.0
+  xml:
+    archive_url: https://pub.dartlang.org/packages/xml/versions/6.2.0.tar.gz
+    dependency: direct main
+    description:
+      name: xml
+      url: https://pub.dartlang.org
+    sha256: 0jwknkfcnb5svg6r01xjsj0aiw06mlx54pgay1ymaaqm2mjhyz01
+    source: hosted
+    version: 6.2.0
+  yaml:
+    archive_url: https://pub.dartlang.org/packages/yaml/versions/3.1.1.tar.gz
+    dependency: transitive
+    description:
+      name: yaml
+      url: https://pub.dartlang.org
+    sha256: 0mqqmzn3c9rr38b5xm312fz1vyp6vb36lm477r9hak77bxzpp0iw
+    source: hosted
+    version: 3.1.1

nix/pubcache.moxxmpp.nix

@@ -0,0 +1,814 @@
+{fetchzip, runCommand} : rec {
+  _fe_analyzer_shared = fetchzip {
+    sha256 = "1hyd5pmjcfyvfwhsc0wq6k0229abmqq5zn95g31hh42bklb2gci5";
+    url = "https://pub.dartlang.org/packages/_fe_analyzer_shared/versions/50.0.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  analyzer = fetchzip {
+    sha256 = "0niy5b3w39aywpjpw5a84pxdilhh3zzv1c22x8ywml756pybmj4r";
+    url = "https://pub.dartlang.org/packages/analyzer/versions/5.2.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  args = fetchzip {
+    sha256 = "0c78zkzg2d2kzw1qrpiyrj1qvm4pr0yhnzapbqk347m780ha408g";
+    url = "https://pub.dartlang.org/packages/args/versions/2.3.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  async = fetchzip {
+    sha256 = "00hhylamsjcqmcbxlsrfimri63gb384l31r9mqvacn6c6bvk4yfx";
+    url = "https://pub.dartlang.org/packages/async/versions/2.10.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  boolean_selector = fetchzip {
+    sha256 = "0hxq8072hb89q9s91xlz9fvrjxfy7hw6jkdwkph5dp77df841kmj";
+    url = "https://pub.dartlang.org/packages/boolean_selector/versions/2.1.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  build = fetchzip {
+    sha256 = "1x6nkii6kqy6y7ck0151yfhc9lp2nvbhznnhdi2mxr8afk6jxigd";
+    url = "https://pub.dartlang.org/packages/build/versions/2.3.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  build_config = fetchzip {
+    sha256 = "092rrbhbdy9fk50jqb1fwj1sfk415fi43irvsd0hk5w90gn8vazj";
+    url = "https://pub.dartlang.org/packages/build_config/versions/1.1.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  build_daemon = fetchzip {
+    sha256 = "0b6hnwjc3gi5g7cnpy8xyiqigcrs0xp51c7y7v1pqn9v75g25w6j";
+    url = "https://pub.dartlang.org/packages/build_daemon/versions/3.1.0.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  build_runner = fetchzip {
+    sha256 = "0246bxl9rxgil55fhfzi7csd9a56blj9s1j1z79717hiyzsr60x6";
+    url = "https://pub.dartlang.org/packages/build_runner/versions/2.3.2.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  built_collection = fetchzip {
+    sha256 = "0bqjahxr42q84w91nhv3n4cr580l3s3ffx3vgzyyypgqnrck0hv3";
+    url = "https://pub.dartlang.org/packages/built_collection/versions/5.1.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  built_value = fetchzip {
+    sha256 = "0sslr4258snvcj8qhbdk6wapka174als0viyxddwqlnhs7dlci8i";
+    url = "https://pub.dartlang.org/packages/built_value/versions/8.4.2.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  code_builder = fetchzip {
+    sha256 = "1vl9dl23yd0zjw52ndrazijs6dw83fg1rvyb2gfdpd6n1lj9nbhg";
+    url = "https://pub.dartlang.org/packages/code_builder/versions/4.3.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  collection = fetchzip {
+    sha256 = "1iyl3v3j7mj3sxjf63b1kc182fwrwd04mjp5x2i61hic8ihfw545";
+    url = "https://pub.dartlang.org/packages/collection/versions/1.17.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  convert = fetchzip {
+    sha256 = "0adsigjk3l1c31i6k91p28dqyjlgwiqrs4lky5djrm2scf8k6cri";
+    url = "https://pub.dartlang.org/packages/convert/versions/3.1.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  coverage = fetchzip {
+    sha256 = "0akbg1yp2h4vprc8r9xvrpgvp5d26h7m80h5sbzgr5dlis1bcw0d";
+    url = "https://pub.dartlang.org/packages/coverage/versions/1.6.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  crypto = fetchzip {
+    sha256 = "1kjfb8fvdxazmv9ps2iqdhb8kcr31115h0nwn6v4xmr71k8jb8ds";
+    url = "https://pub.dartlang.org/packages/crypto/versions/3.0.2.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  cryptography = fetchzip {
+    sha256 = "0jqph45d9lbhdakprnb84c3qhk4aq05hhb1pmn8w23yhl41ypijs";
+    url = "https://pub.dartlang.org/packages/cryptography/versions/2.0.5.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  file = fetchzip {
+    sha256 = "0ajcfblf8d4dicp1sgzkbrhd0b0v0d8wl70jsnf5drjck3p3ppk7";
+    url = "https://pub.dartlang.org/packages/file/versions/6.1.4.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  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";
+    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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  glob = fetchzip {
+    sha256 = "0a6gbwsbz6rkg35dkff0zv88rvcflqdmda90hdfpn7jp1z1w9rhs";
+    url = "https://pub.dartlang.org/packages/glob/versions/2.1.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  graphs = fetchzip {
+    sha256 = "0cr6dgs1a7ln2ir5gd0kiwpn787lk4dwhqfjv8876hkkr1rv80m9";
+    url = "https://pub.dartlang.org/packages/graphs/versions/2.2.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  hex = fetchzip {
+    sha256 = "19w3f90mdiy06a6kf8hlwc4jn4cxixkj106kc3g3bis27ar7smkh";
+    url = "https://pub.dartlang.org/packages/hex/versions/0.2.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  http_multi_server = fetchzip {
+    sha256 = "1zdcm04z85jahb2hs7qs85rh974kw49hffhy9cn1gfda3077dvql";
+    url = "https://pub.dartlang.org/packages/http_multi_server/versions/3.2.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  http_parser = fetchzip {
+    sha256 = "027c4sjkhkkx3sk1aqs6s4djb87syi9h521qpm1bf21bq3gga5jd";
+    url = "https://pub.dartlang.org/packages/http_parser/versions/4.0.2.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  io = fetchzip {
+    sha256 = "1bp5l8hkrp6fjj7zw9af51hxyp52sjspc5558lq0lmi453l0czni";
+    url = "https://pub.dartlang.org/packages/io/versions/1.0.3.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  js = fetchzip {
+    sha256 = "13fbxgyg1v6bmzvxamg6494vk3923fn3mgxj6f4y476aqwk99n50";
+    url = "https://pub.dartlang.org/packages/js/versions/0.6.5.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  json_serializable = fetchzip {
+    sha256 = "04d7laaxrbiybcgbv3y223hy8d6n9f84h5lv9sv79zd9ffzkb2hg";
+    url = "https://pub.dartlang.org/packages/json_serializable/versions/6.5.4.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  logging = fetchzip {
+    sha256 = "0hl1mjh662c44ci7z60x92i0jsyqg1zm6k6fc89n9pdcxsqdpwfs";
+    url = "https://pub.dartlang.org/packages/logging/versions/1.0.2.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  matcher = fetchzip {
+    sha256 = "0pjgc38clnjbv124n8bh724db1wcc4kk125j7dxl0icz7clvm0p0";
+    url = "https://pub.dartlang.org/packages/matcher/versions/0.12.13.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  meta = fetchzip {
+    sha256 = "01kqdd25nln5a219pr94s66p27m0kpqz0wpmwnm24kdy3ngif1v5";
+    url = "https://pub.dartlang.org/packages/meta/versions/1.8.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  mime = fetchzip {
+    sha256 = "1dr3qikzvp10q1saka7azki5gk2kkf2v7k9wfqjsyxmza2zlv896";
+    url = "https://pub.dartlang.org/packages/mime/versions/1.0.2.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  node_preamble = fetchzip {
+    sha256 = "0i0gfc2yqa09182vc01lj47qpq98kfm9m8h4n8c5fby0mjd0lvyx";
+    url = "https://pub.dartlang.org/packages/node_preamble/versions/2.0.1.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  package_config = fetchzip {
+    sha256 = "1d4l0i4cby344zj45f5shrg2pkw1i1jn03kx0qqh0l7gh1ha7bpc";
+    url = "https://pub.dartlang.org/packages/package_config/versions/2.1.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  path = fetchzip {
+    sha256 = "16ggdh29ciy7h8sdshhwmxn6dd12sfbykf2j82c56iwhhlljq181";
+    url = "https://pub.dartlang.org/packages/path/versions/1.8.2.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  pedantic = fetchzip {
+    sha256 = "10ch0h3hi6cfwiz2ihfkh6m36m75c0m7fd0wwqaqggffsj2dn8ad";
+    url = "https://pub.dartlang.org/packages/pedantic/versions/1.11.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  petitparser = fetchzip {
+    sha256 = "1pqqqqiy9ald24qsi24q9qrr0zphgpsrnrv9rlx4vwr6xak7d8c0";
+    url = "https://pub.dartlang.org/packages/petitparser/versions/5.1.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  pinenacl = fetchzip {
+    sha256 = "0didjgva658z90hbcmhd0y8w1b8v86dp6gabfhylnw1aixl47cxg";
+    url = "https://pub.dartlang.org/packages/pinenacl/versions/0.5.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  pool = fetchzip {
+    sha256 = "0wmzs46hjszv3ayhr1p5l7xza7q9rkg2q9z4swmhdqmhlz3c50x4";
+    url = "https://pub.dartlang.org/packages/pool/versions/1.5.1.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  pubspec_parse = fetchzip {
+    sha256 = "19dmr9k4wsqjnhlzp1lbrw8dv7a1gnwmr8l5j9zlw407rmfg20d1";
+    url = "https://pub.dartlang.org/packages/pubspec_parse/versions/1.2.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  random_string = fetchzip {
+    sha256 = "11cjiv75sgldvk3x7w6j77lgi08r6737wm94m3ylabylsr6zdyff";
+    url = "https://pub.dartlang.org/packages/random_string/versions/2.3.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  saslprep = fetchzip {
+    sha256 = "04lss0xvm6p801p8306jdxg7k0b28kr6n65dz2f57dkca237kcw7";
+    url = "https://pub.dartlang.org/packages/saslprep/versions/1.0.2.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  shelf = fetchzip {
+    sha256 = "0x2xl7glrnq0hdxpy2i94a4wxbdrd6dm46hvhzgjn8alsm8z0wz1";
+    url = "https://pub.dartlang.org/packages/shelf/versions/1.4.0.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  shelf_static = fetchzip {
+    sha256 = "1kqbaslz7bna9lldda3ibrjg0gczbzlwgm9cic8shg0bnl0v3s34";
+    url = "https://pub.dartlang.org/packages/shelf_static/versions/1.1.1.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  source_gen = fetchzip {
+    sha256 = "1kxgx782lzpjhv736h0pz3lnxpcgiy05h0ysy0q77gix8q09i1hz";
+    url = "https://pub.dartlang.org/packages/source_gen/versions/1.2.6.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  source_map_stack_trace = fetchzip {
+    sha256 = "0b5d4c5n5qd3j8n10gp1khhr508wfl3819bhk6xnl34qxz8n032k";
+    url = "https://pub.dartlang.org/packages/source_map_stack_trace/versions/2.1.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  source_maps = fetchzip {
+    sha256 = "18ixrlz3l2alk3hp0884qj0mcgzhxmjpg6nq0n1200pfy62pc4z6";
+    url = "https://pub.dartlang.org/packages/source_maps/versions/0.10.11.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  stack_trace = fetchzip {
+    sha256 = "0bggqvvpkrfvqz24bnir4959k0c45azc3zivk4lyv3mvba6092na";
+    url = "https://pub.dartlang.org/packages/stack_trace/versions/1.11.0.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  stream_transform = fetchzip {
+    sha256 = "0jq6767v9ds17i2nd6mdd9i0f7nvsgg3dz74d0v54x66axjgr0gp";
+    url = "https://pub.dartlang.org/packages/stream_transform/versions/2.1.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  string_scanner = fetchzip {
+    sha256 = "0p1r0v2923avwfg03rk0pmc6f21m0zxpcx6i57xygd25k6hdfi00";
+    url = "https://pub.dartlang.org/packages/string_scanner/versions/1.2.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  synchronized = fetchzip {
+    sha256 = "1j6108cq1hbcqpwhk9sah8q3gcidd7222bzhha2nk9syxhzqy82i";
+    url = "https://pub.dartlang.org/packages/synchronized/versions/3.0.0%2B2.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  term_glyph = fetchzip {
+    sha256 = "1x8nspxaccls0sxjamp703yp55yxdvhj6wg21lzwd296i9rwlxh9";
+    url = "https://pub.dartlang.org/packages/term_glyph/versions/1.2.1.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  test = fetchzip {
+    sha256 = "08kimbjvkdw3bkj7za36p3yqdr8dnlb5v30c250kvdncb7k09h4x";
+    url = "https://pub.dartlang.org/packages/test/versions/1.22.0.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  test_core = fetchzip {
+    sha256 = "1r8dnvkxxvh55z1c8lrsja1m0dkf5i4lgwwqixcx0mqvxx5w3005";
+    url = "https://pub.dartlang.org/packages/test_core/versions/0.4.20.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  timing = fetchzip {
+    sha256 = "0a02znvy0fbzr0n4ai67pp8in7w6m768aynkk1kp5lnmgy17ppsg";
+    url = "https://pub.dartlang.org/packages/timing/versions/1.0.0.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";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  unorm_dart = fetchzip {
+    sha256 = "05kyk2764yz14pzgx00i7h5b1lzh8kjqnxspfzyf8z920bcgbz0v";
+    url = "https://pub.dartlang.org/packages/unorm_dart/versions/0.2.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  uuid = fetchzip {
+    sha256 = "12lsynr07lw9848jknmzxvzn3ia12xdj07iiva0vg0qjvpq7ladg";
+    url = "https://pub.dartlang.org/packages/uuid/versions/3.0.5.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  very_good_analysis = fetchzip {
+    sha256 = "1p2dh8aahbqyyqfzbsxswafgxnmxgisjq2xfp008skyh7imk6sz4";
+    url = "https://pub.dartlang.org/packages/very_good_analysis/versions/3.1.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  vm_service = fetchzip {
+    sha256 = "05xaxaxzyfls6jklw1hzws2jmina1cjk10gbl7a63djh1ghnzjb5";
+    url = "https://pub.dartlang.org/packages/vm_service/versions/9.4.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  watcher = fetchzip {
+    sha256 = "1sk7gvwa7s0h4l652qrgbh7l8wyqc6nr6lki8m4rj55720p0fnyg";
+    url = "https://pub.dartlang.org/packages/watcher/versions/1.0.2.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  web_socket_channel = fetchzip {
+    sha256 = "147amn05v1f1a1grxjr7yzgshrczjwijwiywggsv6dgic8kxyj5a";
+    url = "https://pub.dartlang.org/packages/web_socket_channel/versions/2.2.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  webkit_inspection_protocol = fetchzip {
+    sha256 = "0z400dzw7gf68a3wm95xi2mf461iigkyq6x69xgi7qs3fvpmn3hx";
+    url = "https://pub.dartlang.org/packages/webkit_inspection_protocol/versions/1.2.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  xml = fetchzip {
+    sha256 = "0jwknkfcnb5svg6r01xjsj0aiw06mlx54pgay1ymaaqm2mjhyz01";
+    url = "https://pub.dartlang.org/packages/xml/versions/6.2.0.tar.gz";
+    stripRoot = false;
+    extension = "tar.gz";
+  };
+
+  yaml = fetchzip {
+    sha256 = "0mqqmzn3c9rr38b5xm312fz1vyp6vb36lm477r9hak77bxzpp0iw";
+    url = "https://pub.dartlang.org/packages/yaml/versions/3.1.1.tar.gz";
+    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.dartlang.org
+    ln -s ${analyzer} $out/hosted/pub.dartlang.org/analyzer-5.2.0
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${args} $out/hosted/pub.dartlang.org/args-2.3.1
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${async} $out/hosted/pub.dartlang.org/async-2.10.0
+
+    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.dartlang.org
+    ln -s ${build} $out/hosted/pub.dartlang.org/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.dartlang.org
+    ln -s ${build_daemon} $out/hosted/pub.dartlang.org/build_daemon-3.1.0
+
+    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.dartlang.org
+    ln -s ${build_runner} $out/hosted/pub.dartlang.org/build_runner-2.3.2
+
+    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.dartlang.org
+    ln -s ${built_collection} $out/hosted/pub.dartlang.org/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.dartlang.org
+    ln -s ${checked_yaml} $out/hosted/pub.dartlang.org/checked_yaml-2.0.1
+
+    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.dartlang.org
+    ln -s ${collection} $out/hosted/pub.dartlang.org/collection-1.17.0
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${convert} $out/hosted/pub.dartlang.org/convert-3.1.1
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${coverage} $out/hosted/pub.dartlang.org/coverage-1.6.1
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${crypto} $out/hosted/pub.dartlang.org/crypto-3.0.2
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${cryptography} $out/hosted/pub.dartlang.org/cryptography-2.0.5
+
+    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.dartlang.org
+    ln -s ${file} $out/hosted/pub.dartlang.org/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.dartlang.org
+    ln -s ${freezed} $out/hosted/pub.dartlang.org/freezed-2.1.1
+
+    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.dartlang.org
+    ln -s ${frontend_server_client} $out/hosted/pub.dartlang.org/frontend_server_client-3.1.0
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${glob} $out/hosted/pub.dartlang.org/glob-2.1.0
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${graphs} $out/hosted/pub.dartlang.org/graphs-2.2.0
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${hex} $out/hosted/pub.dartlang.org/hex-0.2.0
+
+    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.dartlang.org
+    ln -s ${http_parser} $out/hosted/pub.dartlang.org/http_parser-4.0.2
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${io} $out/hosted/pub.dartlang.org/io-1.0.3
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${js} $out/hosted/pub.dartlang.org/js-0.6.5
+
+    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.dartlang.org
+    ln -s ${json_serializable} $out/hosted/pub.dartlang.org/json_serializable-6.5.4
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${logging} $out/hosted/pub.dartlang.org/logging-1.0.2
+
+    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/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
+
+    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/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
+
+    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.dartlang.org
+    ln -s ${path} $out/hosted/pub.dartlang.org/path-1.8.2
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${pedantic} $out/hosted/pub.dartlang.org/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.dartlang.org
+    ln -s ${pinenacl} $out/hosted/pub.dartlang.org/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.dartlang.org
+    ln -s ${pub_semver} $out/hosted/pub.dartlang.org/pub_semver-2.1.2
+
+    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.dartlang.org
+    ln -s ${random_string} $out/hosted/pub.dartlang.org/random_string-2.3.1
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${saslprep} $out/hosted/pub.dartlang.org/saslprep-1.0.2
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${shelf} $out/hosted/pub.dartlang.org/shelf-1.4.0
+
+    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.dartlang.org
+    ln -s ${shelf_static} $out/hosted/pub.dartlang.org/shelf_static-1.1.1
+
+    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.dartlang.org
+    ln -s ${source_gen} $out/hosted/pub.dartlang.org/source_gen-1.2.6
+
+    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.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.dartlang.org
+    ln -s ${source_maps} $out/hosted/pub.dartlang.org/source_maps-0.10.11
+
+    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.dartlang.org
+    ln -s ${stack_trace} $out/hosted/pub.dartlang.org/stack_trace-1.11.0
+
+    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.dartlang.org
+    ln -s ${stream_transform} $out/hosted/pub.dartlang.org/stream_transform-2.1.0
+
+    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.dartlang.org
+    ln -s ${synchronized} $out/hosted/pub.dartlang.org/synchronized-3.0.0+2
+
+    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.dartlang.org
+    ln -s ${test} $out/hosted/pub.dartlang.org/test-1.22.0
+
+    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.dartlang.org
+    ln -s ${test_core} $out/hosted/pub.dartlang.org/test_core-0.4.20
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${timing} $out/hosted/pub.dartlang.org/timing-1.0.0
+
+    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.dartlang.org
+    ln -s ${unorm_dart} $out/hosted/pub.dartlang.org/unorm_dart-0.2.0
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${uuid} $out/hosted/pub.dartlang.org/uuid-3.0.5
+
+    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.dartlang.org
+    ln -s ${vm_service} $out/hosted/pub.dartlang.org/vm_service-9.4.0
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${watcher} $out/hosted/pub.dartlang.org/watcher-1.0.2
+
+    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.dartlang.org
+    ln -s ${webkit_inspection_protocol} $out/hosted/pub.dartlang.org/webkit_inspection_protocol-1.2.0
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${xml} $out/hosted/pub.dartlang.org/xml-6.2.0
+
+    mkdir -p $out/hosted/pub.dartlang.org
+    ln -s ${yaml} $out/hosted/pub.dartlang.org/yaml-3.1.1
+'';
+
+}

packages/moxxmpp/README.md

@@ -2,6 +2,24 @@
 
 A pure-Dart XMPP library written for Moxxy.
 
+## Usage
+
+Include the following as a dependency in your pubspec file:
+
+```
+ moxxmpp:
+    hosted: https://git.polynom.me/api/packages/Moxxy/pub
+    version: 0.2.0
+```
+
+You can find the documentation [here](https://moxxy.org/developers/docs/moxxmpp/).
+
 ## License
 
 See `./LICENSE`.
+
+## Support
+
+If you like what I do and you want to support me, feel free to donate to me on Ko-Fi.
+
+[<img src="https://codeberg.org/moxxy/moxxyv2/raw/branch/master/assets/repo/kofi.png" height="36" style="height: 36px; border: 0px;"></img>](https://ko-fi.com/papatutuwawa)

packages/moxxmpp/lib/moxxmpp.dart

@@ -1,6 +1,7 @@
 library moxxmpp;
 
 export 'package:moxxmpp/src/connection.dart';
+export 'package:moxxmpp/src/connectivity.dart';
 export 'package:moxxmpp/src/errors.dart';
 export 'package:moxxmpp/src/events.dart';
 export 'package:moxxmpp/src/iq.dart';
@@ -29,6 +30,7 @@ export 'package:moxxmpp/src/rfcs/rfc_2782.dart';
 export 'package:moxxmpp/src/rfcs/rfc_4790.dart';
 export 'package:moxxmpp/src/roster/errors.dart';
 export 'package:moxxmpp/src/roster/roster.dart';
+export 'package:moxxmpp/src/roster/state.dart';
 export 'package:moxxmpp/src/settings.dart';
 export 'package:moxxmpp/src/socket.dart';
 export 'package:moxxmpp/src/stanza.dart';
@@ -75,7 +77,9 @@ export 'package:moxxmpp/src/xeps/xep_0384/xep_0384.dart';
 export 'package:moxxmpp/src/xeps/xep_0385.dart';
 export 'package:moxxmpp/src/xeps/xep_0414.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';
 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';

packages/moxxmpp/lib/src/awaiter.dart

@@ -0,0 +1,94 @@
+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);
+
+  /// 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;
+  }
+}
+
+/// 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.
+///
+/// That means that when sending ```<iq to="example@some.server.example" id="abc123" />```,
+/// the response stanza must be from "example@some.server.example", have id "abc123" and
+/// be an iq stanza.
+///
+/// This class also handles some "edge cases" of RFC 6120, like an empty "from" attribute.
+class StanzaAwaiter {
+  /// The pending stanzas, identified by their surrogate key.
+  final Map<_StanzaSurrogateKey, Completer<XMLNode>> _pending = {};
+
+  /// The critical section for accessing [StanzaAwaiter._pending].
+  final Lock _lock = Lock();
+
+  /// Register a stanza as pending.
+  /// [to] is the value of the stanza's "to" attribute.
+  /// [id] is the value of the stanza's "id" attribute.
+  /// [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 {
+    final completer = await _lock.synchronized(() {
+      final completer = Completer<XMLNode>();
+      _pending[_StanzaSurrogateKey(to, id, tag)] = completer;
+      return completer;
+    });
+
+    return completer.future;
+  }
+
+  /// Checks if the stanza [stanza] is being awaited. [bareJid] is the bare JID of
+  /// the connection.
+  /// 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');
+
+    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(),
+      id,
+      stanza.tag,
+    );
+
+    return _lock.synchronized(() {
+      final completer = _pending[key];
+      if (completer != null) {
+        _pending.remove(key);
+        completer.complete(stanza);
+        return true;
+      }
+
+      return false;
+    });
+  }
+}

packages/moxxmpp/lib/src/buffer.dart

@@ -6,16 +6,21 @@ import 'package:xml/xml.dart';
 import 'package:xml/xml_events.dart';
 
 class XmlStreamBuffer extends StreamTransformerBase<String, XMLNode> {
-
+  XmlStreamBuffer()
-  XmlStreamBuffer() : _streamController = StreamController(), _decoder = const XmlNodeDecoder();
+      : _streamController = StreamController(),
+        _decoder = const XmlNodeDecoder();
   final StreamController<XMLNode> _streamController;
   final XmlNodeDecoder _decoder;
 
   @override
   Stream<XMLNode> bind(Stream<String> stream) {
-    stream.toXmlEvents().selectSubtreeEvents((event) {
+    stream
+        .toXmlEvents()
+        .selectSubtreeEvents((event) {
           return event.qualifiedName != 'stream:stream';
-    }).transform(_decoder).listen((nodes) {
+        })
+        .transform(_decoder)
+        .listen((nodes) {
           for (final node in nodes) {
             if (node.nodeType == XmlNodeType.ELEMENT) {
               _streamController.add(XMLNode.fromXmlElement(node as XmlElement));

packages/moxxmpp/lib/src/connection.dart

@@ -1,7 +1,10 @@
 import 'dart:async';
 import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
+import 'package:moxlib/moxlib.dart';
+import 'package:moxxmpp/src/awaiter.dart';
 import 'package:moxxmpp/src/buffer.dart';
+import 'package:moxxmpp/src/connectivity.dart';
 import 'package:moxxmpp/src/errors.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/iq.dart';
@@ -28,24 +31,38 @@ 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
 enum XmppConnectionState {
+  /// The XmppConnection instance is not connected to the server. This is either the
+  /// case before connecting or after disconnecting.
   notConnected,
+
+  /// We are currently trying to connect to the server.
   connecting,
+
+  /// We are currently connected to the server.
   connected,
+
+  /// We have received an unrecoverable error and the server killed the connection
   error
 }
 
+/// Metadata for [XmppConnection.sendStanza].
 enum StanzaFromType {
-  // Add the full JID to the stanza as the from attribute
+  /// Add the full JID to the stanza as the from attribute
   full,
-  // Add the bare JID to the stanza as the from attribute
+
+  /// Add the bare JID to the stanza as the from attribute
   bare,
-  // Add no JID as the from attribute
+
-  none
+  /// Add no JID as the from attribute
+  none,
 }
 
+/// Nonza describing the XMPP stream header.
 class StreamHeaderNonza extends XMLNode {
-  StreamHeaderNonza(String serverDomain) : super(
+  StreamHeaderNonza(String serverDomain)
+      : super(
           tag: 'stream:stream',
           attributes: <String, String>{
             'xmlns': stanzaXmlns,
@@ -58,50 +75,31 @@ class StreamHeaderNonza extends XMLNode {
         );
 }
 
+/// The result of an awaited connection.
 class XmppConnectionResult {
   const XmppConnectionResult(
-    this.success,
+    this.success, {
-    {
     this.error,
-    }
+  });
-  );
 
+  /// True if the connection was successful. False if it failed for any reason.
   final bool success;
+
   // If a connection attempt fails, i.e. success is false, then this indicates the
   // reason the connection failed.
   final XmppError? error;
 }
 
+/// This class is a connection to the server.
 class XmppConnection {
-  /// [_socket] is for debugging purposes.
-  /// [connectionPingDuration] is the duration after which a ping will be sent to keep
-  /// the connection open. Defaults to 15 minutes.
   XmppConnection(
     ReconnectionPolicy reconnectionPolicy,
-    this._socket,
+    ConnectivityManager connectivityManager,
-    {
+    this._socket, {
     this.connectionPingDuration = const Duration(minutes: 3),
     this.connectingTimeout = const Duration(minutes: 2),
-    }
+  })  : _reconnectionPolicy = reconnectionPolicy,
-  ) :
+        _connectivityManager = connectivityManager {
-    _connectionState = XmppConnectionState.notConnected,
-    _routingState = RoutingState.preConnection,
-    _eventStreamController = StreamController.broadcast(),
-    _resource = '',
-    _streamBuffer = XmlStreamBuffer(),
-    _uuid = const Uuid(),
-    _awaitingResponse = {},
-    _awaitingResponseLock = Lock(),
-    _xmppManagers = {},
-    _incomingStanzaHandlers = List.empty(growable: true),
-    _outgoingPreStanzaHandlers = List.empty(growable: true),
-    _outgoingPostStanzaHandlers = List.empty(growable: true),
-    _reconnectionPolicy = reconnectionPolicy,
-    _featureNegotiators = {},
-    _streamFeatures = List.empty(growable: true),
-    _negotiationLock = Lock(),
-    _isAuthenticated = false,
-    _log = Logger('XmppConnection') {
     // Allow the reconnection policy to perform reconnections by itself
     _reconnectionPolicy.register(
       _attemptReconnection,
@@ -114,69 +112,110 @@ class XmppConnection {
     _socket.getEventStream().listen(_handleSocketEvent);
   }
 
+  /// The state that the connection is currently in
+  XmppConnectionState _connectionState = XmppConnectionState.notConnected;
 
-  /// Connection properties
-  ///
-  /// The state that the connection currently is in
-  XmppConnectionState _connectionState;
   /// The socket that we are using for the connection and its data stream
   final BaseSocketWrapper _socket;
+
+  /// The data stream of the socket
   late final Stream<String> _socketStream;
-  /// Account settings
+
+  /// Connection settings
   late ConnectionSettings _connectionSettings;
+
   /// A policy on how to reconnect
   final ReconnectionPolicy _reconnectionPolicy;
-  /// A list of stanzas we are tracking with its corresponding critical section
-  final Map<String, Completer<XMLNode>> _awaitingResponse;
-  final Lock _awaitingResponseLock;
 
-  /// Helpers
+  /// The class responsible for preventing errors on initial connection due
-  ///
+  /// to no network.
-  final List<StanzaHandler> _incomingStanzaHandlers;
+  final ConnectivityManager _connectivityManager;
-  final List<StanzaHandler> _outgoingPreStanzaHandlers;
+
-  final List<StanzaHandler> _outgoingPostStanzaHandlers;
+  /// A helper for handling await semantics with stanzas
-  final StreamController<XmppEvent> _eventStreamController;
+  final StanzaAwaiter _stanzaAwaiter = StanzaAwaiter();
-  final Map<String, XmppManagerBase> _xmppManagers;
+
+  /// Sorted list of handlers that we call or incoming and outgoing stanzas
+  final List<StanzaHandler> _incomingStanzaHandlers =
+      List.empty(growable: true);
+  final List<StanzaHandler> _incomingPreStanzaHandlers =
+      List.empty(growable: true);
+  final List<StanzaHandler> _outgoingPreStanzaHandlers =
+      List.empty(growable: true);
+  final List<StanzaHandler> _outgoingPostStanzaHandlers =
+      List.empty(growable: true);
+  final StreamController<XmppEvent> _eventStreamController =
+      StreamController.broadcast();
+  final Map<String, XmppManagerBase> _xmppManagers = {};
 
-  /// Stream properties
-  ///
   /// Disco info we got after binding a resource (xmlns)
   final List<String> _serverFeatures = List.empty(growable: true);
+
   /// The buffer object to keep split up stanzas together
-  final XmlStreamBuffer _streamBuffer;
+  final XmlStreamBuffer _streamBuffer = XmlStreamBuffer();
+
   /// UUID object to generate stanza and origin IDs
-  final Uuid _uuid;
+  final Uuid _uuid = const Uuid();
+
   /// The time between sending a ping to keep the connection open
   // TODO(Unknown): Only start the timer if we did not send a stanza after n seconds
   final Duration connectionPingDuration;
+
   /// The time that we may spent in the "connecting" state
   final Duration connectingTimeout;
+
   /// The current state of the connection handling state machine.
-  RoutingState _routingState;
+  RoutingState _routingState = RoutingState.preConnection;
+
   /// The currently bound resource or '' if none has been bound yet.
-  String _resource;
+  String _resource = '';
+
   /// True if we are authenticated. False if not.
-  bool _isAuthenticated;
+  bool _isAuthenticated = false;
+
   /// Timer for the keep-alive ping.
   Timer? _connectionPingTimer;
+
   /// Timer for the connecting timeout
   Timer? _connectingTimeoutTimer;
+
   /// Completers for certain actions
   // ignore: use_late_for_private_fields_and_variables
   Completer<XmppConnectionResult>? _connectionCompleter;
-  /// Controls whether an XmppSocketClosureEvent triggers a reconnection.
-  bool _socketClosureTriggersReconnect = true;
 
   /// Negotiators
-  final Map<String, XmppFeatureNegotiatorBase> _featureNegotiators;
+  final Map<String, XmppFeatureNegotiatorBase> _featureNegotiators = {};
   XmppFeatureNegotiatorBase? _currentNegotiator;
-  final List<XMLNode> _streamFeatures;
+  final List<XMLNode> _streamFeatures = List.empty(growable: true);
+
   /// Prevent data from being passed to _currentNegotiator.negotiator while the negotiator
   /// is still running.
-  final Lock _negotiationLock;
+  final Lock _negotiationLock = Lock();
 
-  /// Misc
+  /// The logger for the class
-  final Logger _log;
+  final Logger _log = Logger('XmppConnection');
+
+  /// A value indicating whether a connection attempt is currently running or not
+  bool _isConnectionRunning = false;
+  final Lock _connectionRunningLock = Lock();
+
+  /// Enters the critical section for accessing [XmppConnection._isConnectionRunning]
+  /// and does the following:
+  /// - if _isConnectionRunning is false, set it to true and return false.
+  /// - if _isConnectionRunning is true, return true.
+  Future<bool> _testAndSetIsConnectionRunning() async =>
+      _connectionRunningLock.synchronized(() {
+        if (!_isConnectionRunning) {
+          _isConnectionRunning = true;
+          return false;
+        }
+
+        return true;
+      });
+
+  /// Enters the critical section for accessing [XmppConnection._isConnectionRunning]
+  /// and sets it to false.
+  Future<void> _resetIsConnectionRunning() async =>
+      _connectionRunningLock.synchronized(() => _isConnectionRunning = false);
 
   ReconnectionPolicy get reconnectionPolicy => _reconnectionPolicy;
 
@@ -186,14 +225,13 @@ class XmppConnection {
 
   /// Return the registered feature negotiator that has id [id]. Returns null if
   /// none can be found.
-  T? getNegotiatorById<T extends XmppFeatureNegotiatorBase>(String id) => _featureNegotiators[id] as T?;
+  T? getNegotiatorById<T extends XmppFeatureNegotiatorBase>(String id) =>
+      _featureNegotiators[id] as T?;
 
-  /// Registers an [XmppManagerBase] sub-class as a manager on this connection.
+  /// Registers a list of [XmppManagerBase] sub-classes as managers on this connection.
-  /// [sortHandlers] should NOT be touched. It specified if the handler priorities
+  Future<void> registerManagers(List<XmppManagerBase> managers) async {
-  /// should be set up. The only time this should be false is when called via
+    for (final manager in managers) {
-  /// [registerManagers].
+      _log.finest('Registering ${manager.id}');
-  void registerManager(XmppManagerBase manager, { bool sortHandlers = true }) {
-    _log.finest('Registering ${manager.getId()}');
       manager.register(
         XmppManagerAttributes(
           sendStanza: sendStanza,
@@ -209,40 +247,28 @@ class XmppConnection {
         ),
       );
 
-    final id = manager.getId();
+      _xmppManagers[manager.id] = manager;
-    _xmppManagers[id] = manager;
-
-    if (id == discoManager) {
-      // NOTE: It is intentional that we do not exclude the [DiscoManager] from this
-      //       loop. It may also register features.
-      for (final registeredManager in _xmppManagers.values) {
-        (manager as DiscoManager).addDiscoFeatures(registeredManager.getDiscoFeatures());
-      }
-    } else if (_xmppManagers.containsKey(discoManager)) {
-      (_xmppManagers[discoManager]! as DiscoManager).addDiscoFeatures(manager.getDiscoFeatures());
-    }
 
       _incomingStanzaHandlers.addAll(manager.getIncomingStanzaHandlers());
+      _incomingPreStanzaHandlers.addAll(manager.getIncomingPreStanzaHandlers());
       _outgoingPreStanzaHandlers.addAll(manager.getOutgoingPreStanzaHandlers());
-    _outgoingPostStanzaHandlers.addAll(manager.getOutgoingPostStanzaHandlers());
+      _outgoingPostStanzaHandlers
-    
+          .addAll(manager.getOutgoingPostStanzaHandlers());
-    if (sortHandlers) {
-      _incomingStanzaHandlers.sort(stanzaHandlerSortComparator);
-      _outgoingPreStanzaHandlers.sort(stanzaHandlerSortComparator);
-      _outgoingPostStanzaHandlers.sort(stanzaHandlerSortComparator);
-    }
-  }
-
-  /// Like [registerManager], but for a list of managers.
-  void registerManagers(List<XmppManagerBase> managers) {
-    for (final manager in managers) {
-      registerManager(manager, sortHandlers: false);
     }
 
     // Sort them
     _incomingStanzaHandlers.sort(stanzaHandlerSortComparator);
+    _incomingPreStanzaHandlers.sort(stanzaHandlerSortComparator);
     _outgoingPreStanzaHandlers.sort(stanzaHandlerSortComparator);
     _outgoingPostStanzaHandlers.sort(stanzaHandlerSortComparator);
+
+    // Run the post register callbacks
+    for (final manager in _xmppManagers.values) {
+      if (!manager.initialized) {
+        _log.finest('Running post-registration callback for ${manager.name}');
+        await manager.postRegisterCallback();
+      }
+    }
   }
 
   /// Register a list of negotiator with the connection.
@@ -283,12 +309,16 @@ class XmppConnection {
   }
 
   /// Returns the Manager with id [id] or null if such a manager is not registered.
-  T? getManagerById<T extends XmppManagerBase>(String id) => _xmppManagers[id] as T?;
+  T? getManagerById<T extends XmppManagerBase>(String id) =>
+      _xmppManagers[id] as T?;
 
   /// A [PresenceManager] is required, so have a wrapper for getting it.
   /// Returns the registered [PresenceManager].
   PresenceManager getPresenceManager() {
-    assert(_xmppManagers.containsKey(presenceManager), 'A PresenceManager is mandatory');
+    assert(
+      _xmppManagers.containsKey(presenceManager),
+      'A PresenceManager is mandatory',
+    );
 
     return getManagerById(presenceManager)!;
   }
@@ -296,7 +326,10 @@ class XmppConnection {
   /// A [DiscoManager] is required so, have a wrapper for getting it.
   /// Returns the registered [DiscoManager].
   DiscoManager getDiscoManager() {
-    assert(_xmppManagers.containsKey(discoManager), 'A DiscoManager is mandatory');
+    assert(
+      _xmppManagers.containsKey(discoManager),
+      'A DiscoManager is mandatory',
+    );
 
     return getManagerById(discoManager)!;
   }
@@ -304,7 +337,10 @@ class XmppConnection {
   /// A [RosterManager] is required, so have a wrapper for getting it.
   /// Returns the registered [RosterManager].
   RosterManager getRosterManager() {
-    assert(_xmppManagers.containsKey(rosterManager), 'A RosterManager is mandatory');
+    assert(
+      _xmppManagers.containsKey(rosterManager),
+      'A RosterManager is mandatory',
+    );
 
     return getManagerById(rosterManager)!;
   }
@@ -331,6 +367,13 @@ class XmppConnection {
 
   /// Attempts to reconnect to the server by following an exponential backoff.
   Future<void> _attemptReconnection() async {
+    if (await _testAndSetIsConnectionRunning()) {
+      _log.warning(
+        '_attemptReconnection is called but connection attempt is already running. Ignoring...',
+      );
+      return;
+    }
+
     _log.finest('_attemptReconnection: Setting state to notConnected');
     await _setConnectionState(XmppConnectionState.notConnected);
     _log.finest('_attemptReconnection: Done');
@@ -342,7 +385,7 @@ class XmppConnection {
     // Connect again
     // ignore: cascade_invocations
     _log.finest('Calling connect() from _attemptReconnection');
-    await connect();
+    await connect(waitForConnection: true);
   }
 
   /// Called when a stream ending error has occurred
@@ -353,8 +396,13 @@ class XmppConnection {
     // the connection result is being awaited, don't attempt a reconnection but instead
     // try to gracefully disconnect.
     if (_connectionCompleter != null) {
-      _log.info('Not triggering reconnection since connection result is being awaited');
+      _log.info(
-      await _disconnect(triggeredByUser: false, state: XmppConnectionState.error);
+        'Not triggering reconnection since connection result is being awaited',
+      );
+      await _disconnect(
+        triggeredByUser: false,
+        state: XmppConnectionState.error,
+      );
       _connectionCompleter?.complete(
         XmppConnectionResult(
           false,
@@ -365,7 +413,20 @@ class XmppConnection {
       return;
     }
 
+    if (!error.isRecoverable()) {
+      // We cannot recover this error
+      _log.severe(
+        'Since a $error is not recoverable, not attempting a reconnection',
+      );
       await _setConnectionState(XmppConnectionState.error);
+      await _sendEvent(
+        NonRecoverableErrorEvent(error),
+      );
+      return;
+    }
+
+    // The error is recoverable
+    await _setConnectionState(XmppConnectionState.notConnected);
     await _reconnectionPolicy.onFailure();
   }
 
@@ -374,11 +435,15 @@ class XmppConnection {
     if (event is XmppSocketErrorEvent) {
       await handleError(SocketError(event));
     } else if (event is XmppSocketClosureEvent) {
-      if (_socketClosureTriggersReconnect) {
+      if (!event.expected) {
-        _log.fine('Received XmppSocketClosureEvent. Reconnecting...');
+        _log.fine(
-        await _reconnectionPolicy.onFailure();
+          'Received unexpected XmppSocketClosureEvent. Reconnecting...',
+        );
+        await handleError(SocketError(XmppSocketErrorEvent(event)));
       } else {
-        _log.fine('Received XmppSocketClosureEvent. No reconnection attempt since _socketClosureTriggersReconnect is false...');
+        _log.fine(
+          'Received XmppSocketClosureEvent. No reconnection attempt since _socketClosureTriggersReconnect is false...',
+        );
       }
     }
   }
@@ -408,10 +473,8 @@ class XmppConnection {
 
   /// Returns true if we can send data through the socket.
   Future<bool> _canSendData() async {
-    return [
+    return [XmppConnectionState.connected, XmppConnectionState.connecting]
-      XmppConnectionState.connected,
+        .contains(await getConnectionState());
-      XmppConnectionState.connecting
-    ].contains(await getConnectionState());
   }
 
   /// Sends a [stanza] to the server. If stream management is enabled, then keeping track
@@ -423,29 +486,46 @@ class XmppConnection {
   /// If addId is true, then an 'id' attribute will be added to the stanza if [stanza] has
   /// none.
   // 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 }) async {
+  Future<XMLNode> sendStanza(
-    var stanza_ = stanza;
+    Stanza stanza, {
+    StanzaFromType addFrom = StanzaFromType.full,
+    bool addId = true,
+    bool awaitable = true,
+    bool encrypted = false,
+    bool forceEncryption = false,
+  }) async {
+    assert(
+      implies(addId == false && stanza.id == null, !awaitable),
+      'Cannot await a stanza with no 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());
     }
-    if (addFrom != StanzaFromType.none && (stanza_.from == null || stanza_.from == '')) {
+    if (addFrom != StanzaFromType.none &&
+        (stanza_.from == null || stanza_.from == '')) {
       switch (addFrom) {
-        case StanzaFromType.full: {
+        case StanzaFromType.full:
-          stanza_ = stanza_.copyWith(from: _connectionSettings.jid.withResource(_resource).toString());
+          {
+            stanza_ = stanza_.copyWith(
+              from: _connectionSettings.jid.withResource(_resource).toString(),
+            );
           }
           break;
-        case StanzaFromType.bare: {
+        case StanzaFromType.bare:
-          stanza_ = stanza_.copyWith(from: _connectionSettings.jid.toBare().toString());
+          {
+            stanza_ = stanza_.copyWith(
+              from: _connectionSettings.jid.toBare().toString(),
+            );
           }
           break;
-        case StanzaFromType.none: break;
+        case StanzaFromType.none:
+          break;
       }
     }
 
-    final id = stanza_.id!;
-
     _log.fine('Running pre stanza handlers..');
     final data = await _runOutgoingPreStanzaHandlers(
       stanza_,
@@ -455,6 +535,7 @@ class XmppConnection {
         null,
         stanza_,
         encrypted: encrypted,
+        forceEncryption: forceEncryption,
       ),
     );
     _log.fine('Done');
@@ -468,28 +549,33 @@ class XmppConnection {
         from: data.stanza.to,
         attributes: <String, String>{
           'type': 'error',
-          ...data.stanza.id != null ? {
+          ...data.stanza.id != null
+              ? {
                   'id': data.stanza.id!,
-          } : {},
+                }
+              : {},
         },
       );
     }
 
-    final prefix = data.encrypted ?
+    final prefix = data.encrypted ? '(Encrypted) ' : '';
-      '(Encrypted) ' :
-      '';
     _log.finest('==> $prefix${stanza_.toXml()}');
 
     final stanzaString = data.stanza.toXml();
 
     // ignore: cascade_invocations
-    _log.fine('Attempting to acquire lock for $id...');
+    _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'));
-    await _awaitingResponseLock.synchronized(() async {
-        _log.fine('Lock acquired for $id');
     if (awaitable) {
-          _awaitingResponse[id] = Completer();
+      future = 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.id!,
+        data.stanza.tag,
+      );
     }
 
     // This uses the StreamManager to behave like a send queue
@@ -514,13 +600,6 @@ class XmppConnection {
     );
     _log.fine('Done');
 
-        if (awaitable) {
-          future = _awaitingResponse[id]!.future;
-        }
-
-        _log.fine('Releasing lock for $id');
-    });
-
     return future;
   }
 
@@ -549,7 +628,9 @@ class XmppConnection {
     final oldState = _connectionState;
     _connectionState = state;
 
-    final sm = getNegotiatorById<StreamManagementNegotiator>(streamManagementNegotiator);
+    final sm = getNegotiatorById<StreamManagementNegotiator>(
+      streamManagementNegotiator,
+    );
     await _sendEvent(
       ConnectionStateChangedEvent(
         state,
@@ -560,7 +641,8 @@ class XmppConnection {
 
     if (state == XmppConnectionState.connected) {
       _log.finest('Starting _pingConnectionTimer');
-      _connectionPingTimer = Timer.periodic(connectionPingDuration, _pingConnectionOpen);
+      _connectionPingTimer =
+          Timer.periodic(connectionPingDuration, _pingConnectionOpen);
 
       // We are connected, so the timer can stop.
       _destroyConnectingTimer();
@@ -611,14 +693,20 @@ class XmppConnection {
       _log.finest('_pingConnectionTimer: Connected. Triggering a ping event.');
       unawaited(_sendEvent(SendPingEvent()));
     } else {
-      _log.finest('_pingConnectionTimer: Not connected. Not triggering an event.');
+      _log.finest(
+        '_pingConnectionTimer: Not connected. Not triggering an event.',
+      );
     }
   }
 
   /// Iterate over [handlers] and check if the handler matches [stanza]. If it does,
   /// call its callback and end the processing if the callback returned true; continue
   /// if it returned false.
-  Future<StanzaHandlerData> _runStanzaHandlers(List<StanzaHandler> handlers, Stanza stanza, { StanzaHandlerData? initial }) async {
+  Future<StanzaHandlerData> _runStanzaHandlers(
+    List<StanzaHandler> handlers,
+    Stanza stanza, {
+    StanzaHandlerData? initial,
+  }) async {
     var state = initial ?? StanzaHandlerData(false, false, null, stanza);
     for (final handler in handlers) {
       if (handler.matches(state.stanza)) {
@@ -630,15 +718,36 @@ class XmppConnection {
     return state;
   }
 
-  Future<StanzaHandlerData> _runIncomingStanzaHandlers(Stanza stanza) async {
+  Future<StanzaHandlerData> _runIncomingStanzaHandlers(
-    return _runStanzaHandlers(_incomingStanzaHandlers, stanza);
+    Stanza stanza, {
+    StanzaHandlerData? initial,
+  }) async {
+    return _runStanzaHandlers(
+      _incomingStanzaHandlers,
+      stanza,
+      initial: initial,
+    );
   }
 
-  Future<StanzaHandlerData> _runOutgoingPreStanzaHandlers(Stanza stanza, { StanzaHandlerData? initial }) async {
+  Future<StanzaHandlerData> _runIncomingPreStanzaHandlers(Stanza stanza) async {
-    return _runStanzaHandlers(_outgoingPreStanzaHandlers, stanza, initial: initial);
+    return _runStanzaHandlers(_incomingPreStanzaHandlers, stanza);
   }
 
-  Future<bool> _runOutgoingPostStanzaHandlers(Stanza stanza, { StanzaHandlerData? initial }) async {
+  Future<StanzaHandlerData> _runOutgoingPreStanzaHandlers(
+    Stanza stanza, {
+    StanzaHandlerData? initial,
+  }) async {
+    return _runStanzaHandlers(
+      _outgoingPreStanzaHandlers,
+      stanza,
+      initial: initial,
+    );
+  }
+
+  Future<bool> _runOutgoingPostStanzaHandlers(
+    Stanza stanza, {
+    StanzaHandlerData? initial,
+  }) async {
     final data = await _runStanzaHandlers(
       _outgoingPostStanzaHandlers,
       stanza,
@@ -654,14 +763,12 @@ class XmppConnection {
       _log.finest('<== ${nonza.toXml()}');
 
       var nonzaHandled = false;
-      await Future.forEach(
+      await Future.forEach(_xmppManagers.values,
-        _xmppManagers.values,
           (XmppManagerBase manager) async {
         final handled = await manager.runNonzaHandlers(nonza);
 
         if (!nonzaHandled && handled) nonzaHandled = true;
-        }
+      });
-      );
 
       if (!nonzaHandled) {
         _log.warning('Unhandled nonza received: ${nonza.toXml()}');
@@ -673,41 +780,45 @@ class XmppConnection {
 
     // Run the incoming stanza handlers and bounce with an error if no manager handled
     // it.
-    final incomingHandlers = await _runIncomingStanzaHandlers(stanza);
+    final incomingPreHandlers = await _runIncomingPreStanzaHandlers(stanza);
-    final prefix = incomingHandlers.encrypted ?
+    final prefix = incomingPreHandlers.encrypted &&
-      '(Encrypted) ' :
+            incomingPreHandlers.other['encryption_error'] == null
-      '';
+        ? '(Encrypted) '
-    _log.finest('<== $prefix${incomingHandlers.stanza.toXml()}');
+        : '';
-
+    _log.finest('<== $prefix${incomingPreHandlers.stanza.toXml()}');
-    // See if we are waiting for this stanza
-    final id = stanza.attributes['id'] as String?;
-    var awaited = false;
-    await _awaitingResponseLock.synchronized(() async {
-      if (id != null && _awaitingResponse.containsKey(id)) {
-        _awaitingResponse[id]!.complete(incomingHandlers.stanza);
-        _awaitingResponse.remove(id);
-        awaited = true;
-      }
-    });
 
+    final awaited = await _stanzaAwaiter.onData(
+      incomingPreHandlers.stanza,
+      _connectionSettings.jid.toBare(),
+    );
     if (awaited) {
       return;
     }
 
     // Only bounce if the stanza has neither been awaited, nor handled.
+    final incomingHandlers = await _runIncomingStanzaHandlers(
+      incomingPreHandlers.stanza,
+      initial: StanzaHandlerData(
+        false,
+        incomingPreHandlers.cancel,
+        incomingPreHandlers.cancelReason,
+        incomingPreHandlers.stanza,
+        encrypted: incomingPreHandlers.encrypted,
+        other: incomingPreHandlers.other,
+      ),
+    );
     if (!incomingHandlers.done) {
-      handleUnhandledStanza(this, stanza);
+      await handleUnhandledStanza(this, incomingPreHandlers);
     }
   }
 
   /// Returns true if all mandatory features in [features] have been negotiated.
   /// Otherwise returns false.
   bool _isMandatoryNegotiationDone(List<XMLNode> features) {
-    return features.every(
+    return features.every((XMLNode feature) {
-      (XMLNode feature) {
+      return feature.firstTag('required') == null &&
-        return feature.firstTag('required') == null && feature.tag != 'mechanisms';
+          feature.tag != 'mechanisms';
-      }
+    });
-    );
   }
 
   /// Returns true if we can still negotiate. Returns false if no negotiator is
@@ -719,18 +830,21 @@ class XmppConnection {
   /// Returns the next negotiator that matches [features]. Returns null if none can be
   /// picked. If [log] is true, then the list of matching negotiators will be logged.
   @visibleForTesting
-  XmppFeatureNegotiatorBase? getNextNegotiator(List<XMLNode> features, {bool log = true}) {
+  XmppFeatureNegotiatorBase? getNextNegotiator(
+    List<XMLNode> features, {
+    bool log = true,
+  }) {
     final matchingNegotiators = _featureNegotiators.values
-      .where(
+        .where((XmppFeatureNegotiatorBase negotiator) {
-        (XmppFeatureNegotiatorBase negotiator) {
+      return negotiator.state == NegotiatorState.ready &&
-          return negotiator.state == NegotiatorState.ready && negotiator.matchesFeature(features);
+          negotiator.matchesFeature(features);
-        }
+    }).toList()
-      )
-      .toList()
       ..sort((a, b) => b.priority.compareTo(a.priority));
 
     if (log) {
-      _log.finest('List of matching negotiators: ${matchingNegotiators.map((a) => a.id)}');
+      _log.finest(
+        'List of matching negotiators: ${matchingNegotiators.map((a) => a.id)}',
+      );
     }
 
     if (matchingNegotiators.isEmpty) return null;
@@ -742,12 +856,17 @@ class XmppConnection {
   /// a disco sweep among other things.
   Future<void> _onNegotiationsDone() async {
     // Set the connection state
+    await _resetIsConnectionRunning();
     await _setConnectionState(XmppConnectionState.connected);
 
     // Resolve the connection completion future
     _connectionCompleter?.complete(const XmppConnectionResult(true));
     _connectionCompleter = null;
 
+    // Tell consumers of the event stream that we're done with stream feature
+    // negotiations
+    await _sendEvent(StreamNegotiationsDoneEvent());
+
     // Send out initial presence
     await getPresenceManager().sendInitialPresence();
   }
@@ -755,7 +874,9 @@ class XmppConnection {
   Future<void> _executeCurrentNegotiator(XMLNode nonza) async {
     // If we don't have a negotiator get one
     _currentNegotiator ??= getNextNegotiator(_streamFeatures);
-    if (_currentNegotiator == null && _isMandatoryNegotiationDone(_streamFeatures) && !_isNegotiationPossible(_streamFeatures)) {
+    if (_currentNegotiator == null &&
+        _isMandatoryNegotiationDone(_streamFeatures) &&
+        !_isNegotiationPossible(_streamFeatures)) {
       _log.finest('Negotiations done!');
       _updateRoutingState(RoutingState.handleStanzas);
       await _onNegotiationsDone();
@@ -765,6 +886,7 @@ class XmppConnection {
     final result = await _currentNegotiator!.negotiate(nonza);
     if (result.isType<NegotiatorError>()) {
       _log.severe('Negotiator returned an error');
+      await _resetIsConnectionRunning();
       await handleError(result.get<NegotiatorError>());
       return;
     }
@@ -772,22 +894,25 @@ class XmppConnection {
     final state = result.get<NegotiatorState>();
     _currentNegotiator!.state = state;
     switch (state) {
-      case NegotiatorState.ready: return;
+      case NegotiatorState.ready:
+        return;
       case NegotiatorState.done:
         if (_currentNegotiator!.sendStreamHeaderWhenDone) {
           _currentNegotiator = null;
           _streamFeatures.clear();
           _sendStreamHeader();
         } else {
-        _streamFeatures
+          _streamFeatures.removeWhere((node) {
-          .removeWhere((node) {
+            return node.attributes['xmlns'] ==
-            return node.attributes['xmlns'] == _currentNegotiator!.negotiatingXmlns;
+                _currentNegotiator!.negotiatingXmlns;
           });
           _currentNegotiator = null;
 
-        if (_isMandatoryNegotiationDone(_streamFeatures) && !_isNegotiationPossible(_streamFeatures)) {
+          if (_isMandatoryNegotiationDone(_streamFeatures) &&
+              !_isNegotiationPossible(_streamFeatures)) {
             _log.finest('Negotiations done!');
             _updateRoutingState(RoutingState.handleStanzas);
+            await _resetIsConnectionRunning();
             await _onNegotiationsDone();
           } else {
             _currentNegotiator = getNextNegotiator(_streamFeatures);
@@ -806,11 +931,12 @@ class XmppConnection {
         _log.finest('Negotiator wants to continue later. Picking new one...');
         _currentNegotiator!.state = NegotiatorState.ready;
 
-      
+        if (_isMandatoryNegotiationDone(_streamFeatures) &&
-      if (_isMandatoryNegotiationDone(_streamFeatures) && !_isNegotiationPossible(_streamFeatures)) {
+            !_isNegotiationPossible(_streamFeatures)) {
           _log.finest('Negotiations done!');
 
           _updateRoutingState(RoutingState.handleStanzas);
+          await _resetIsConnectionRunning();
           await _onNegotiationsDone();
         } else {
           _log.finest('Picking new negotiator...');
@@ -824,9 +950,12 @@ class XmppConnection {
         }
         break;
       case NegotiatorState.skipRest:
-      _log.finest('Negotiator wants to skip the remaining negotiation... Negotiations (assumed) done!');
+        _log.finest(
+          'Negotiator wants to skip the remaining negotiation... Negotiations (assumed) done!',
+        );
 
         _updateRoutingState(RoutingState.handleStanzas);
+        await _resetIsConnectionRunning();
         await _onNegotiationsDone();
         break;
     }
@@ -890,13 +1019,17 @@ class XmppConnection {
 
     // Specific event handling
     if (event is ResourceBindingSuccessEvent) {
-      _log.finest('Received ResourceBindingSuccessEvent. Setting _resource to ${event.resource}');
+      _log.finest(
+        'Received ResourceBindingSuccessEvent. Setting _resource to ${event.resource}',
+      );
       setResource(event.resource);
 
       _log.finest('Resetting _serverFeatures');
       _serverFeatures.clear();
     } else if (event is AuthenticationSuccessEvent) {
-      _log.finest('Received AuthenticationSuccessEvent. Setting _isAuthenticated to true');
+      _log.finest(
+        'Received AuthenticationSuccessEvent. Setting _isAuthenticated to true',
+      );
       _isAuthenticated = true;
     }
 
@@ -912,9 +1045,7 @@ class XmppConnection {
     _socket.write(
       XMLNode(
         tag: 'xml',
-        attributes: <String, String>{
+        attributes: <String, String>{'version': '1.0'},
-          'version': '1.0'
-        },
         closeTag: false,
         isDeclaration: true,
         children: [
@@ -925,9 +1056,10 @@ class XmppConnection {
   }
 
   /// To be called when we lost the network connection.
-  void _onNetworkConnectionLost() {
+  Future<void> _onNetworkConnectionLost() async {
     _socket.close();
-    _setConnectionState(XmppConnectionState.notConnected);
+    await _resetIsConnectionRunning();
+    await _setConnectionState(XmppConnectionState.notConnected);
   }
 
   /// Attempt to gracefully close the session
@@ -935,9 +1067,11 @@ class XmppConnection {
     await _disconnect(state: XmppConnectionState.notConnected);
   }
 
-  Future<void> _disconnect({required XmppConnectionState state, bool triggeredByUser = true}) async {
+  Future<void> _disconnect({
-    _reconnectionPolicy.setShouldReconnect(false);
+    required XmppConnectionState state,
-    _socketClosureTriggersReconnect = false;
+    bool triggeredByUser = true,
+  }) async {
+    await _reconnectionPolicy.setShouldReconnect(false);
 
     if (triggeredByUser) {
       getPresenceManager().sendUnavailablePresence();
@@ -960,40 +1094,77 @@ class XmppConnection {
 
   /// Make sure that all required managers are registered
   void _runPreConnectionAssertions() {
-    assert(_xmppManagers.containsKey(presenceManager), 'A PresenceManager is mandatory');
+    assert(
-    assert(_xmppManagers.containsKey(rosterManager), 'A RosterManager is mandatory');
+      _xmppManagers.containsKey(presenceManager),
-    assert(_xmppManagers.containsKey(discoManager), 'A DiscoManager is mandatory');
+      'A PresenceManager is mandatory',
-    assert(_xmppManagers.containsKey(pingManager), 'A PingManager is mandatory');
+    );
+    assert(
+      _xmppManagers.containsKey(rosterManager),
+      'A RosterManager is mandatory',
+    );
+    assert(
+      _xmppManagers.containsKey(discoManager),
+      'A DiscoManager is mandatory',
+    );
+    assert(
+      _xmppManagers.containsKey(pingManager),
+      'A PingManager is mandatory',
+    );
   }
 
   /// Like [connect] but the Future resolves when the resource binding is either done or
   /// SASL has failed.
-  Future<XmppConnectionResult> connectAwaitable({ String? lastResource }) {
+  Future<XmppConnectionResult> connectAwaitable({
+    String? lastResource,
+    bool waitForConnection = false,
+  }) async {
     _runPreConnectionAssertions();
+    await _resetIsConnectionRunning();
     _connectionCompleter = Completer();
     _log.finest('Calling connect() from connectAwaitable');
-    connect(lastResource: lastResource);
+    await connect(
+      lastResource: lastResource,
+      waitForConnection: waitForConnection,
+      shouldReconnect: false,
+    );
     return _connectionCompleter!.future;
   }
 
   /// Start the connection process using the provided connection settings.
-  Future<void> connect({ String? lastResource }) async {
+  Future<void> connect({
-    if (_connectionState != XmppConnectionState.notConnected && _connectionState != XmppConnectionState.error) {
+    String? lastResource,
-      _log.fine('Cancelling this connection attempt as one appears to be already running.');
+    bool waitForConnection = false,
+    bool shouldReconnect = true,
+  }) async {
+    if (_connectionState != XmppConnectionState.notConnected &&
+        _connectionState != XmppConnectionState.error) {
+      _log.fine(
+        'Cancelling this connection attempt as one appears to be already running.',
+      );
       return;
     }
 
     _runPreConnectionAssertions();
-    _reconnectionPolicy.setShouldReconnect(true);
+    await _resetIsConnectionRunning();
 
     if (lastResource != null) {
       setResource(lastResource);
     }
 
+    if (shouldReconnect) {
+      await _reconnectionPolicy.setShouldReconnect(true);
+    }
+
     await _reconnectionPolicy.reset();
-    _socketClosureTriggersReconnect = true;
     await _sendEvent(ConnectingEvent());
 
+    // If requested, wait until we have a network connection
+    if (waitForConnection) {
+      _log.info('Waiting for okay from connectivityManager');
+      await _connectivityManager.waitForConnection();
+      _log.info('Got okay from connectivityManager');
+    }
+
     final smManager = getStreamManagementManager();
     String? host;
     int? port;

packages/moxxmpp/lib/src/connectivity.dart

@@ -0,0 +1,18 @@
+/// This manager class is responsible to tell the moxxmpp XmppConnection
+/// when a connection can be established or not, regarding the network availability.
+abstract class ConnectivityManager {
+  /// Returns true if a network connection is available. If not, returns false.
+  Future<bool> hasConnection();
+
+  /// Returns a future that resolves once we have a network connection.
+  Future<void> waitForConnection();
+}
+
+/// An implementation of [ConnectivityManager] that is always connected.
+class AlwaysConnectedConnectivityManager extends ConnectivityManager {
+  @override
+  Future<bool> hasConnection() async => true;
+
+  @override
+  Future<void> waitForConnection() async {}
+}

packages/moxxmpp/lib/src/errors.dart

@@ -1,20 +1,37 @@
 import 'package:moxxmpp/src/socket.dart';
 
 /// An internal error class
-abstract class XmppError {}
+// ignore: one_member_abstracts
+abstract class XmppError {
+  /// Return true if we can recover from the error by attempting a reconnection.
+  bool isRecoverable();
+}
 
 /// Returned if we could not establish a TCP connection
 /// to the server.
-class NoConnectionError extends XmppError {}
+class NoConnectionError extends XmppError {
+  @override
+  bool isRecoverable() => true;
+}
 
 /// Returned if a socket error occured
 class SocketError extends XmppError {
   SocketError(this.event);
   final XmppSocketErrorEvent event;
+
+  @override
+  bool isRecoverable() => true;
 }
 
 /// Returned if we time out
-class TimeoutError extends XmppError {}
+class TimeoutError extends XmppError {
+  @override
+  bool isRecoverable() => true;
+}
 
 /// Returned if we received a stream error
-class StreamError extends XmppError {}
+class StreamError extends XmppError {
+  // TODO(PapaTutuWawa): Be more precise
+  @override
+  bool isRecoverable() => true;
+}

packages/moxxmpp/lib/src/events.dart

@@ -1,14 +1,18 @@
 import 'package:moxxmpp/src/connection.dart';
+import 'package:moxxmpp/src/errors.dart';
 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/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';
@@ -51,6 +55,22 @@ class StreamResumedEvent extends XmppEvent {
 /// Triggered when stream resumption failed
 class StreamResumeFailedEvent extends XmppEvent {}
 
+/// Triggered when the roster has been modified
+class RosterUpdatedEvent extends XmppEvent {
+  RosterUpdatedEvent(this.removed, this.modified, this.added);
+
+  /// A list of bare JIDs that are removed from the roster
+  final List<String> removed;
+
+  /// A list of XmppRosterItems that are modified. Can be correlated with one's cache
+  /// using the jid attribute.
+  final List<XmppRosterItem> modified;
+
+  /// A list of XmppRosterItems that are added to the roster.
+  final List<XmppRosterItem> added;
+}
+
+/// Triggered when a message is received
 class MessageEvent extends XmppEvent {
   MessageEvent({
     required this.body,
@@ -75,6 +95,9 @@ class MessageEvent extends XmppEvent {
     this.funCancellation,
     this.messageRetraction,
     this.messageCorrectionId,
+    this.messageReactions,
+    this.messageProcessingHints,
+    this.stickerPackId,
   });
   final StanzaError? error;
   final String body;
@@ -97,6 +120,9 @@ class MessageEvent extends XmppEvent {
   final bool encrypted;
   final MessageRetractionData? messageRetraction;
   final String? messageCorrectionId;
+  final MessageReactions? messageReactions;
+  final List<MessageProcessingHint>? messageProcessingHints;
+  final String? stickerPackId;
   final Map<String, dynamic> other;
 }
 
@@ -162,7 +188,11 @@ class SubscriptionRequestReceivedEvent extends XmppEvent {
 
 /// Triggered when we receive a new or updated avatar
 class AvatarUpdatedEvent extends XmppEvent {
-  AvatarUpdatedEvent({ required this.jid, required this.base64, required this.hash });
+  AvatarUpdatedEvent({
+    required this.jid,
+    required this.base64,
+    required this.hash,
+  });
   final String jid;
   final String base64;
   final String hash;
@@ -211,3 +241,15 @@ class OmemoDeviceListUpdatedEvent extends XmppEvent {
   final JID jid;
   final List<int> deviceList;
 }
+
+/// Triggered when a reconnection is not performed due to a non-recoverable
+/// error.
+class NonRecoverableErrorEvent extends XmppEvent {
+  NonRecoverableErrorEvent(this.error);
+
+  /// The error in question.
+  final XmppError error;
+}
+
+/// Triggered when the stream negotiations are done.
+class StreamNegotiationsDoneEvent extends XmppEvent {}

packages/moxxmpp/lib/src/iq.dart

@@ -1,10 +1,31 @@
 import 'package:moxxmpp/src/connection.dart';
+import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/stanza.dart';
 
-bool handleUnhandledStanza(XmppConnection conn, Stanza stanza) {
+/// Bounce a stanza if it was not handled by any manager. [conn] is the connection object
-  if (stanza.type != 'error' && stanza.type != 'result') {
+/// to use for sending the stanza. [data] is the StanzaHandlerData of the unhandled
-    conn.sendStanza(stanza.errorReply('cancel', 'feature-not-implemented'));
+/// stanza.
-  }
+Future<void> handleUnhandledStanza(
+  XmppConnection conn,
+  StanzaHandlerData data,
+) async {
+  if (data.stanza.type != 'error' && data.stanza.type != 'result') {
+    final stanza = data.stanza.copyWith(
+      to: data.stanza.from,
+      from: data.stanza.to,
+      type: 'error',
+      children: [
+        buildErrorElement(
+          'cancel',
+          'feature-not-implemented',
+        ),
+      ],
+    );
 
-  return true;
+    await conn.sendStanza(
+      stanza,
+      awaitable: false,
+      forceEncryption: data.encrypted,
+    );
+  }
 }

packages/moxxmpp/lib/src/jid.dart

@@ -1,83 +1,79 @@
 import 'package:meta/meta.dart';
 
+/// Represents a Jabber ID in parsed form.
 @immutable
 class JID {
-
   const JID(this.local, this.domain, this.resource);
 
+  /// Parses the string [jid] into a JID instance.
   factory JID.fromString(String jid) {
-    // 0: Parsing either the local or domain part
+    // Algorithm taken from here: https://blog.samwhited.com/2021/02/xmpp-addresses/
-    // 1: Parsing the domain part
+    var localPart = '';
-    // 2: Parsing the resource
+    var domainPart = '';
-    var state = 0;
+    var resourcePart = '';
-    var buffer = '';
-    var local_ = '';
-    var domain_ = '';
-    var resource_ = '';
 
-    for (var i = 0; i < jid.length; i++) {
+    final slashParts = jid.split('/');
-      final c = jid[i];
+    if (slashParts.length == 1) {
-      final eol = i == jid.length - 1;
+      resourcePart = '';
-      
-      switch (state) {
-        case 0: {
-          if (c == '@') {
-            local_ = buffer;
-            buffer = '';
-            state = 1;
-          } else if (c == '/') {
-            domain_ = buffer;
-            buffer = '';
-            state = 2;
-          } else if (eol) {
-            domain_ = buffer + c;
     } else {
-            buffer += c;
+      resourcePart = slashParts.sublist(1).join('/');
-          }
-        }
-        break;
-        case 1: {
-          if (c == '/') {
-            domain_ = buffer;
-            buffer = '';
-            state = 2;
-          } else if (eol) {
-            domain_ = buffer;
 
-            if (c != ' ') {
+      assert(
-              domain_ = domain_ + c;
+        resourcePart.isNotEmpty,
-            }
+        'Resource part cannot be there and empty',
-          } else if (c != ' ') {
+      );
-            buffer += c;
-          }
-        }
-        break;
-        case 2: {
-          if (eol) {
-            resource_ = buffer;
-
-            if (c != ' ') {
-              resource_ = resource_ + c;
-            }
-          } else if (c != ''){
-            buffer += c;
-          }
-        }
-      }
     }
 
-    return JID(local_, domain_, resource_);
+    final atParts = slashParts.first.split('@');
+    if (atParts.length == 1) {
+      localPart = '';
+      domainPart = atParts.first;
+    } else {
+      localPart = atParts.first;
+      domainPart = atParts.sublist(1).join('@');
+
+      assert(localPart.isNotEmpty, 'Local part cannot be there and empty');
+    }
+
+    return JID(
+      localPart,
+      domainPart.endsWith('.')
+          ? domainPart.substring(0, domainPart.length - 1)
+          : domainPart,
+      resourcePart,
+    );
   }
   final String local;
   final String domain;
   final String resource;
 
+  /// Returns true if the JID is bare.
   bool isBare() => resource.isEmpty;
+
+  /// Returns true if the JID is full.
   bool isFull() => resource.isNotEmpty;
 
-  JID toBare() => JID(local, domain, '');
+  /// 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);
 
+  /// 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.
+  bool bareCompare(JID other, {bool ensureBare = false}) {
+    if (ensureBare && !other.isBare()) return false;
+
+    return local == other.local && domain == other.domain;
+  }
+
+  /// Converts to JID instance into its string representation of
+  /// localpart@domainpart/resource.
   @override
   String toString() {
     var result = '';
@@ -97,7 +93,9 @@ class JID {
   @override
   bool operator ==(Object other) {
     if (other is JID) {
-      return other.local == local && other.domain == domain && other.resource == resource;
+      return other.local == local &&
+          other.domain == domain &&
+          other.resource == resource;
     }
 
     return false;

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

@@ -1,5 +1,4 @@
 import 'dart:async';
-
 import 'package:moxxmpp/src/connection.dart';
 import 'package:moxxmpp/src/events.dart';
 import 'package:moxxmpp/src/jid.dart';
@@ -11,7 +10,6 @@ import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
 class XmppManagerAttributes {
-  
   XmppManagerAttributes({
     required this.sendStanza,
     required this.sendNonza,
@@ -24,8 +22,16 @@ class XmppManagerAttributes {
     required this.getConnection,
     required this.getNegotiatorById,
   });
+
   /// Send a stanza whose response can be awaited.
-  final Future<XMLNode> Function(Stanza stanza, { StanzaFromType addFrom, bool addId, bool awaitable, bool encrypted}) sendStanza;
+  final Future<XMLNode> Function(
+    Stanza stanza, {
+    StanzaFromType addFrom,
+    bool addId,
+    bool awaitable,
+    bool encrypted,
+    bool forceEncryption,
+  }) sendStanza;
 
   /// Send a nonza.
   final void Function(XMLNode) sendNonza;
@@ -51,5 +57,6 @@ class XmppManagerAttributes {
   /// Return the [XmppConnection] the manager is registered against.
   final XmppConnection Function() getConnection;
 
-  final T? Function<T extends XmppFeatureNegotiatorBase>(String) getNegotiatorById;
+  final T? Function<T extends XmppFeatureNegotiatorBase>(String)
+      getNegotiatorById;
 }

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

@@ -1,17 +1,28 @@
 import 'package:logging/logging.dart';
+import 'package:meta/meta.dart';
 import 'package:moxxmpp/src/events.dart';
 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/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_0198/xep_0198.dart';
 
 abstract class XmppManagerBase {
+  XmppManagerBase(this.id);
+
   late final XmppManagerAttributes _managerAttributes;
   late final Logger _log;
 
+  /// Flag indicating that the post registration callback has been called once.
+  bool initialized = false;
+
   /// Registers the callbacks from XmppConnection with the manager
   void register(XmppManagerAttributes attributes) {
     _managerAttributes = attributes;
-    _log = Logger(getName());
+    _log = Logger(name);
   }
 
   /// Returns the attributes that are registered with the manager.
@@ -21,28 +32,41 @@ abstract class XmppManagerBase {
   }
 
   /// Return the StanzaHandlers associated with this manager that deal with stanzas we
-  /// send. These are run before the stanza is sent.
+  /// send. These are run before the stanza is sent. The higher the value of the
+  /// handler's priority, the earlier it is run.
   List<StanzaHandler> getOutgoingPreStanzaHandlers() => [];
 
   /// Return the StanzaHandlers associated with this manager that deal with stanzas we
-  /// send. These are run after the stanza is sent.
+  /// send. These are run after the stanza is sent. The higher the value of the
+  /// handler's priority, the earlier it is run.
   List<StanzaHandler> getOutgoingPostStanzaHandlers() => [];
 
   /// Return the StanzaHandlers associated with this manager that deal with stanzas we
-  /// receive.
+  /// receive. The higher the value of the
+  /// handler's priority, the earlier it is run.
   List<StanzaHandler> getIncomingStanzaHandlers() => [];
 
-  /// Return the NonzaHandlers associated with this manager.
+  /// Return the StanzaHandlers associated with this manager that deal with stanza handlers
+  /// that have to run before the main ones run. This is useful, for example, for OMEMO
+  /// as we have to decrypt the stanza before we do anything else. The higher the value
+  /// of the handler's priority, the earlier it is run.
+  List<StanzaHandler> getIncomingPreStanzaHandlers() => [];
+
+  /// Return the NonzaHandlers associated with this manager. The higher the value of the
+  /// handler's priority, the earlier it is run.
   List<NonzaHandler> getNonzaHandlers() => [];
 
   /// Return a list of features that should be included in a disco response.
   List<String> getDiscoFeatures() => [];
 
-  /// Return the Id (akin to xmlns) of this manager.
+  /// Return a list of identities that should be included in a disco response.
-  String getId();
+  List<Identity> getDiscoIdentities() => [];
 
-  /// Return a name that will be used for logging.
+  /// Return the Id (akin to xmlns) of this manager.
-  String getName();
+  final String id;
+
+  /// The name of the manager.
+  String get name => toString();
 
   /// Return the logger for this manager.
   Logger get logger => _log;
@@ -53,20 +77,73 @@ abstract class XmppManagerBase {
   /// Returns true if the XEP is supported on the server. If not, returns false
   Future<bool> isSupported();
 
+  /// Called after the registration of all managers against the XmppConnection is done.
+  /// This method is only called once during the entire lifetime of it.
+  @mustCallSuper
+  Future<void> postRegisterCallback() async {
+    initialized = true;
+
+    final disco = getAttributes().getManagerById<DiscoManager>(discoManager);
+    if (disco != null) {
+      if (getDiscoFeatures().isNotEmpty) {
+        disco.addFeatures(getDiscoFeatures());
+      }
+
+      if (getDiscoIdentities().isNotEmpty) {
+        disco.addIdentities(getDiscoIdentities());
+      }
+    }
+  }
+
   /// Runs all NonzaHandlers of this Manager which match the nonza. Resolves to true if
   /// the nonza has been handled by one of the handlers. Resolves to false otherwise.
   Future<bool> runNonzaHandlers(XMLNode nonza) async {
     var handled = false;
-    await Future.forEach(
+    await Future.forEach(getNonzaHandlers(), (NonzaHandler handler) async {
-      getNonzaHandlers(),
-      (NonzaHandler handler) async {
       if (handler.matches(nonza)) {
         handled = true;
         await handler.callback(nonza);
       }
-      }
+    });
-    );
 
     return handled;
   }
+
+  /// Returns true, if the current stream negotiations resulted in a new stream. Useful
+  /// for plugins to reset their cache in case of a new stream.
+  /// The value only makes sense after receiving a StreamNegotiationsDoneEvent.
+  Future<bool> isNewStream() async {
+    final sm =
+        getAttributes().getManagerById<StreamManagementManager>(smManager);
+
+    return sm?.streamResumed == false;
+  }
+
+  /// Sends a reply of the stanza in [data] with [type]. Replaces the original stanza's
+  /// children with [children].
+  ///
+  /// Note that this function currently only accepts IQ stanzas.
+  Future<void> reply(
+    StanzaHandlerData data,
+    String type,
+    List<XMLNode> children,
+  ) async {
+    assert(
+      data.stanza.tag == 'iq',
+      'Reply makes little sense for non-IQ stanzas',
+    );
+
+    final stanza = data.stanza.copyWith(
+      to: data.stanza.from,
+      from: data.stanza.to,
+      type: type,
+      children: children,
+    );
+
+    await getAttributes().sendStanza(
+      stanza,
+      awaitable: false,
+      forceEncryption: data.encrypted,
+    );
+  }
 }

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

@@ -7,6 +7,7 @@ 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';
@@ -26,8 +27,7 @@ class StanzaHandlerData with _$StanzaHandlerData {
     dynamic cancelReason,
     // The stanza that is being dealt with. SHOULD NOT be overwritten, unless it is absolutely
     // necessary, e.g. with Message Carbons or OMEMO
-    Stanza stanza,
+    Stanza stanza, {
-    {
     // Whether the stanza is retransmitted. Only useful in the context of outgoing
     // stanza handlers. MUST NOT be overwritten.
     @Default(false) bool retransmitted,
@@ -49,6 +49,11 @@ class StanzaHandlerData with _$StanzaHandlerData {
     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
@@ -61,6 +66,9 @@ class StanzaHandlerData with _$StanzaHandlerData {
     MessageRetractionData? messageRetraction,
     // If non-null, then the message is a correction for the specified stanza Id
     String? lastMessageCorrectionSid,
-    }
+    // Reactions data
-  ) = _StanzaHandlerData;
+    MessageReactions? messageReactions,
+    // The Id of the sticker pack this sticker belongs to
+    String? stickerPackId,
+  }) = _StanzaHandlerData;
 }

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

@@ -48,6 +48,11 @@ mixin _$StanzaHandlerData {
   String? get funCancellation =>
       throw _privateConstructorUsedError; // Whether the stanza was received encrypted
   bool get encrypted =>
+      throw _privateConstructorUsedError; // If true, forces the encryption manager to encrypt to the JID, even if it
+// would not normally. In the case of OMEMO: If shouldEncrypt returns false
+// but forceEncryption is true, then the OMEMO manager will try to encrypt
+// to the JID anyway.
+  bool get forceEncryption =>
       throw _privateConstructorUsedError; // The stated type of encryption used, if any was used
   ExplicitEncryptionType? get encryptionType =>
       throw _privateConstructorUsedError; // Delayed Delivery
@@ -59,7 +64,11 @@ mixin _$StanzaHandlerData {
 // 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;
+  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 =>
@@ -90,11 +99,14 @@ abstract class $StanzaHandlerDataCopyWith<$Res> {
       String? funReplacement,
       String? funCancellation,
       bool encrypted,
+      bool forceEncryption,
       ExplicitEncryptionType? encryptionType,
       DelayedDelivery? delayedDelivery,
       Map<String, dynamic> other,
       MessageRetractionData? messageRetraction,
-      String? lastMessageCorrectionSid});
+      String? lastMessageCorrectionSid,
+      MessageReactions? messageReactions,
+      String? stickerPackId});
 }
 
 /// @nodoc
@@ -126,11 +138,14 @@ class _$StanzaHandlerDataCopyWithImpl<$Res>
     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
@@ -205,6 +220,10 @@ class _$StanzaHandlerDataCopyWithImpl<$Res>
           ? _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
@@ -225,6 +244,14 @@ class _$StanzaHandlerDataCopyWithImpl<$Res>
           ? _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?,
     ));
   }
 }
@@ -255,11 +282,14 @@ abstract class _$$_StanzaHandlerDataCopyWith<$Res>
       String? funReplacement,
       String? funCancellation,
       bool encrypted,
+      bool forceEncryption,
       ExplicitEncryptionType? encryptionType,
       DelayedDelivery? delayedDelivery,
       Map<String, dynamic> other,
       MessageRetractionData? messageRetraction,
-      String? lastMessageCorrectionSid});
+      String? lastMessageCorrectionSid,
+      MessageReactions? messageReactions,
+      String? stickerPackId});
 }
 
 /// @nodoc
@@ -293,11 +323,14 @@ class __$$_StanzaHandlerDataCopyWithImpl<$Res>
     Object? funReplacement = freezed,
     Object? funCancellation = freezed,
     Object? encrypted = freezed,
+    Object? forceEncryption = freezed,
     Object? encryptionType = freezed,
     Object? delayedDelivery = freezed,
     Object? other = freezed,
     Object? messageRetraction = freezed,
     Object? lastMessageCorrectionSid = freezed,
+    Object? messageReactions = freezed,
+    Object? stickerPackId = freezed,
   }) {
     return _then(_$_StanzaHandlerData(
       done == freezed
@@ -372,6 +405,10 @@ class __$$_StanzaHandlerDataCopyWithImpl<$Res>
           ? _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
@@ -392,6 +429,14 @@ class __$$_StanzaHandlerDataCopyWithImpl<$Res>
           ? _value.lastMessageCorrectionSid
           : lastMessageCorrectionSid // ignore: cast_nullable_to_non_nullable
               as String?,
+      messageReactions: messageReactions == freezed
+          ? _value.messageReactions
+          : messageReactions // ignore: cast_nullable_to_non_nullable
+              as MessageReactions?,
+      stickerPackId: stickerPackId == freezed
+          ? _value.stickerPackId
+          : stickerPackId // ignore: cast_nullable_to_non_nullable
+              as String?,
     ));
   }
 }
@@ -414,11 +459,14 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
       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.lastMessageCorrectionSid,
+      this.messageReactions,
+      this.stickerPackId})
       : _other = other;
 
 // Indicates to the runner that processing is now done. This means that all
@@ -476,6 +524,13 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
   @override
   @JsonKey()
   final bool encrypted;
+// If true, forces the encryption manager to encrypt to the JID, even if it
+// would not normally. In the case of OMEMO: If shouldEncrypt returns false
+// but forceEncryption is true, then the OMEMO manager will try to encrypt
+// to the JID anyway.
+  @override
+  @JsonKey()
+  final bool forceEncryption;
 // The stated type of encryption used, if any was used
   @override
   final ExplicitEncryptionType? encryptionType;
@@ -501,10 +556,16 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
 // 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, encryptionType: $encryptionType, delayedDelivery: $delayedDelivery, other: $other, messageRetraction: $messageRetraction, lastMessageCorrectionSid: $lastMessageCorrectionSid)';
+    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
@@ -536,6 +597,8 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
             const DeepCollectionEquality()
                 .equals(other.funCancellation, funCancellation) &&
             const DeepCollectionEquality().equals(other.encrypted, encrypted) &&
+            const DeepCollectionEquality()
+                .equals(other.forceEncryption, forceEncryption) &&
             const DeepCollectionEquality()
                 .equals(other.encryptionType, encryptionType) &&
             const DeepCollectionEquality()
@@ -544,7 +607,11 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
             const DeepCollectionEquality()
                 .equals(other.messageRetraction, messageRetraction) &&
             const DeepCollectionEquality().equals(
-                other.lastMessageCorrectionSid, lastMessageCorrectionSid));
+                other.lastMessageCorrectionSid, lastMessageCorrectionSid) &&
+            const DeepCollectionEquality()
+                .equals(other.messageReactions, messageReactions) &&
+            const DeepCollectionEquality()
+                .equals(other.stickerPackId, stickerPackId));
   }
 
   @override
@@ -568,11 +635,14 @@ class _$_StanzaHandlerData implements _StanzaHandlerData {
         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(lastMessageCorrectionSid),
+        const DeepCollectionEquality().hash(messageReactions),
+        const DeepCollectionEquality().hash(stickerPackId)
       ]);
 
   @JsonKey(ignore: true)
@@ -599,11 +669,14 @@ abstract class _StanzaHandlerData implements StanzaHandlerData {
       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}) = _$_StanzaHandlerData;
+      final String? lastMessageCorrectionSid,
+      final MessageReactions? messageReactions,
+      final String? stickerPackId}) = _$_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.
@@ -646,6 +719,11 @@ abstract class _StanzaHandlerData implements StanzaHandlerData {
   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
@@ -658,6 +736,10 @@ abstract class _StanzaHandlerData implements StanzaHandlerData {
   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 =>

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

@@ -5,7 +5,6 @@ import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
 abstract class Handler {
-
   const Handler(this.matchStanzas, {this.nonzaTag, this.nonzaXmlns});
   final String? nonzaTag;
   final String? nonzaXmlns;
@@ -20,7 +19,8 @@ abstract class Handler {
     }
 
     if (nonzaXmlns != null && nonzaTag != null) {
-      matches = (node.attributes['xmlns'] ?? '') == nonzaXmlns! && node.tag == nonzaTag!;
+      matches = (node.attributes['xmlns'] ?? '') == nonzaXmlns! &&
+          node.tag == nonzaTag!;
     }
 
     if (matchStanzas && nonzaTag == null) {
@@ -32,7 +32,6 @@ abstract class Handler {
 }
 
 class NonzaHandler extends Handler {
-
   NonzaHandler({
     required this.callback,
     String? nonzaTag,
@@ -46,7 +45,6 @@ class NonzaHandler extends Handler {
 }
 
 class StanzaHandler extends Handler {
-
   StanzaHandler({
     required this.callback,
     this.tagXmlns,
@@ -78,7 +76,9 @@ class StanzaHandler extends Handler {
     } else if (tagXmlns != null) {
       return listContains(
         node.children,
-        (XMLNode node_) => node_.attributes.containsKey('xmlns') && node_.attributes['xmlns'] == tagXmlns,
+        (XMLNode node_) =>
+            node_.attributes.containsKey('xmlns') &&
+            node_.attributes['xmlns'] == tagXmlns,
       );
     }
 
@@ -90,4 +90,5 @@ class StanzaHandler extends Handler {
   }
 }
 
-int stanzaHandlerSortComparator(StanzaHandler a, StanzaHandler b) => b.priority.compareTo(a.priority);
+int stanzaHandlerSortComparator(StanzaHandler a, StanzaHandler b) =>
+    b.priority.compareTo(a.priority);

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

@@ -1,28 +1,33 @@
-const smManager = 'im.moxxmpp.streammangementmanager';
+const smManager = 'org.moxxmpp.streammangementmanager';
-const discoManager = 'im.moxxmpp.discomanager';
+const discoManager = 'org.moxxmpp.discomanager';
-const messageManager = 'im.moxxmpp.messagemanager';
+const messageManager = 'org.moxxmpp.messagemanager';
-const rosterManager = 'im.moxxmpp.rostermanager';
+const rosterManager = 'org.moxxmpp.rostermanager';
-const presenceManager = 'im.moxxmpp.presencemanager';
+const presenceManager = 'org.moxxmpp.presencemanager';
-const csiManager = 'im.moxxmpp.csimanager';
+const csiManager = 'org.moxxmpp.csimanager';
-const carbonsManager = 'im.moxxmpp.carbonsmanager';
+const carbonsManager = 'org.moxxmpp.carbonsmanager';
-const vcardManager = 'im.moxxmpp.vcardmanager';
+const vcardManager = 'org.moxxmpp.vcardmanager';
-const pubsubManager = 'im.moxxmpp.pubsubmanager';
+const pubsubManager = 'org.moxxmpp.pubsubmanager';
-const userAvatarManager = 'im.moxxmpp.useravatarmanager';
+const userAvatarManager = 'org.moxxmpp.useravatarmanager';
-const stableIdManager = 'im.moxxmpp.stableidmanager';
+const stableIdManager = 'org.moxxmpp.stableidmanager';
-const simsManager = 'im.moxxmpp.simsmanager';
+const simsManager = 'org.moxxmpp.simsmanager';
-const messageDeliveryReceiptManager = 'im.moxxmpp.messagedeliveryreceiptmanager';
+const messageDeliveryReceiptManager =
-const chatMarkerManager = 'im.moxxmpp.chatmarkermanager';
+    'org.moxxmpp.messagedeliveryreceiptmanager';
-const oobManager = 'im.moxxmpp.oobmanager';
+const chatMarkerManager = 'org.moxxmpp.chatmarkermanager';
-const sfsManager = 'im.moxxmpp.sfsmanager';
+const oobManager = 'org.moxxmpp.oobmanager';
-const messageRepliesManager = 'im.moxxmpp.messagerepliesmanager';
+const sfsManager = 'org.moxxmpp.sfsmanager';
-const blockingManager = 'im.moxxmpp.blockingmanager';
+const messageRepliesManager = 'org.moxxmpp.messagerepliesmanager';
-const httpFileUploadManager = 'im.moxxmpp.httpfileuploadmanager';
+const blockingManager = 'org.moxxmpp.blockingmanager';
-const chatStateManager = 'im.moxxmpp.chatstatemanager';
+const httpFileUploadManager = 'org.moxxmpp.httpfileuploadmanager';
-const pingManager = 'im.moxxmpp.ping';
+const chatStateManager = 'org.moxxmpp.chatstatemanager';
-const fileUploadNotificationManager = 'im.moxxmpp.fileuploadnotificationmanager';
+const pingManager = 'org.moxxmpp.ping';
+const fileUploadNotificationManager =
+    'org.moxxmpp.fileuploadnotificationmanager';
 const omemoManager = 'org.moxxmpp.omemomanager';
 const emeManager = 'org.moxxmpp.ememanager';
 const cryptographicHashManager = 'org.moxxmpp.cryptographichashmanager';
 const delayedDeliveryManager = 'org.moxxmpp.delayeddeliverymanager';
 const messageRetractionManager = 'org.moxxmpp.messageretractionmanager';
 const lastMessageCorrectionManager = 'org.moxxmpp.lastmessagecorrectionmanager';
+const messageReactionsManager = 'org.moxxmpp.messagereactionsmanager';
+const stickersManager = 'org.moxxmpp.stickersmanager';
+const entityCapabilitiesManager = 'org.moxxmpp.entitycapabilities';

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

@@ -0,0 +1 @@
+

packages/moxxmpp/lib/src/message.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';
@@ -13,12 +14,20 @@ 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_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,
@@ -38,6 +47,10 @@ class MessageDetails {
     this.shouldEncrypt = false,
     this.messageRetraction,
     this.lastMessageCorrectionId,
+    this.messageReactions,
+    this.messageProcessingHints,
+    this.stickerPackId,
+    this.setOOBFallbackBody = true,
   });
   final String to;
   final String? body;
@@ -56,14 +69,14 @@ class MessageDetails {
   final bool shouldEncrypt;
   final MessageRetractionData? messageRetraction;
   final String? lastMessageCorrectionId;
+  final MessageReactions? messageReactions;
+  final String? stickerPackId;
+  final List<MessageProcessingHint>? messageProcessingHints;
+  final bool setOOBFallbackBody;
 }
 
 class MessageManager extends XmppManagerBase {
-  @override
+  MessageManager() : super(messageManager);
-  String getId() => messageManager;
-
-  @override
-  String getName() => 'MessageManager';
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -77,11 +90,21 @@ class MessageManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onMessage(Stanza _, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessage(
+    Stanza _,
+    StanzaHandlerData state,
+  ) async {
     final message = state.stanza;
     final body = message.firstTag('body');
 
-    getAttributes().sendEvent(MessageEvent(
+    final hints = List<MessageProcessingHint>.empty(growable: true);
+    for (final element
+        in message.findTagsByXmlns(messageProcessingHintsXmlns)) {
+      hints.add(messageProcessingHintFromXml(element));
+    }
+
+    getAttributes().sendEvent(
+      MessageEvent(
         body: body != null ? body.innerText() : '',
         fromJid: JID.fromString(message.attributes['from']! as String),
         toJid: JID.fromString(message.attributes['to']! as String),
@@ -102,9 +125,13 @@ class MessageManager extends XmppManagerBase {
         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),
-    ),);
+      ),
+    );
 
     return state.copyWith(done: true);
   }
@@ -115,6 +142,14 @@ class MessageManager extends XmppManagerBase {
   /// 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,
+      ),
+      'When quoting a message, then quoteFrom and quoteId must also be non-null',
+    );
+
     final stanza = Stanza.message(
       to: details.to,
       type: 'chat',
@@ -123,35 +158,30 @@ class MessageManager extends XmppManagerBase {
     );
 
     if (details.quoteBody != null) {
-      final fallback = '&gt; ${details.quoteBody!}';
+      final quote = QuoteData.fromBodies(details.quoteBody!, details.body!);
 
       stanza
         ..addChild(
-          XMLNode(tag: 'body', text: '$fallback\n${details.body}'),
+          XMLNode(tag: 'body', text: quote.body),
         )
         ..addChild(
           XMLNode.xmlns(
             tag: 'reply',
             xmlns: replyXmlns,
-            attributes: {
+            attributes: {'to': details.quoteFrom!, 'id': details.quoteId!},
-              'to': details.quoteFrom!,
-              'id': details.quoteId!
-            },
           ),
         )
         ..addChild(
           XMLNode.xmlns(
             tag: 'fallback',
             xmlns: fallbackXmlns,
-            attributes: {
+            attributes: {'for': replyXmlns},
-              'for': replyXmlns
-            },
             children: [
               XMLNode(
                 tag: 'body',
                 attributes: <String, String>{
                   'start': '0',
-                  'end': '${fallback.length}'
+                  'end': '${quote.fallbackLength}',
                 },
               )
             ],
@@ -159,7 +189,7 @@ class MessageManager extends XmppManagerBase {
         );
     } else {
       var body = details.body;
-      if (details.sfs != null) {
+      if (details.sfs != null && details.setOOBFallbackBody) {
         // TODO(Unknown): Maybe find a better solution
         final firstSource = details.sfs!.sources.first;
         if (firstSource is StatelessFileSharingUrlSource) {
@@ -171,10 +201,12 @@ class MessageManager extends XmppManagerBase {
         body = details.messageRetraction!.fallback;
       }
 
+      if (body != null) {
         stanza.addChild(
           XMLNode(tag: 'body', text: body),
         );
       }
+    }
 
     if (details.requestDeliveryReceipt) {
       stanza.addChild(makeMessageDeliveryRequest());
@@ -190,7 +222,8 @@ class MessageManager extends XmppManagerBase {
       stanza.addChild(details.sfs!.toXML());
 
       final source = details.sfs!.sources.first;
-      if (source is StatelessFileSharingUrlSource) {
+      if (source is StatelessFileSharingUrlSource &&
+          details.setOOBFallbackBody) {
         // SFS recommends OOB as a fallback
         stanza.addChild(constructOOBNode(OOBData(url: source.url)));
       }
@@ -199,7 +232,10 @@ class MessageManager extends XmppManagerBase {
     if (details.chatState != null) {
       stanza.addChild(
         // TODO(Unknown): Move this into xep_0085.dart
-        XMLNode.xmlns(tag: chatStateToString(details.chatState!), xmlns: chatStateXmlns),
+        XMLNode.xmlns(
+          tag: chatStateToString(details.chatState!),
+          xmlns: chatStateXmlns,
+        ),
       );
     }
 
@@ -262,6 +298,28 @@ class MessageManager extends XmppManagerBase {
       );
     }
 
+    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);
   }
 }

packages/moxxmpp/lib/src/namespaces.dart

@@ -28,9 +28,11 @@ const vCardTempUpdate = 'vcard-temp:x:update';
 const pubsubXmlns = 'http://jabber.org/protocol/pubsub';
 const pubsubEventXmlns = 'http://jabber.org/protocol/pubsub#event';
 const pubsubOwnerXmlns = 'http://jabber.org/protocol/pubsub#owner';
-const pubsubPublishOptionsXmlns = 'http://jabber.org/protocol/pubsub#publish-options';
+const pubsubPublishOptionsXmlns =
+    'http://jabber.org/protocol/pubsub#publish-options';
 const pubsubNodeConfigMax = 'http://jabber.org/protocol/pubsub#config-node-max';
-const pubsubNodeConfigMultiItems = 'http://jabber.org/protocol/pubsub#multi-items';
+const pubsubNodeConfigMultiItems =
+    'http://jabber.org/protocol/pubsub#multi-items';
 
 // XEP-0066
 const oobDataXmlns = 'jabber:x:oob';
@@ -123,9 +125,12 @@ const fasteningXmlns = 'urn:xmpp:fasten:0';
 // XEP-0424
 const messageRetractionXmlns = 'urn:xmpp:message-retract:0';
 
-// XEp-0428
+// XEP-0428
 const fallbackIndicationXmlns = 'urn:xmpp:fallback:0';
 
+// XEP-0444
+const messageReactionsXmlns = 'urn:xmpp:reactions:0';
+
 // XEP-0446
 const fileMetadataXmlns = 'urn:xmpp:file:metadata:0';
 
@@ -134,10 +139,15 @@ const sfsXmlns = 'urn:xmpp:sfs:0';
 
 // XEP-0448
 const sfsEncryptionXmlns = 'urn:xmpp:esfs:0';
-const sfsEncryptionAes128GcmNoPaddingXmlns = 'urn:xmpp:ciphers:aes-128-gcm-nopadding:0';
+const sfsEncryptionAes128GcmNoPaddingXmlns =
-const sfsEncryptionAes256GcmNoPaddingXmlns = 'urn:xmpp:ciphers:aes-256-gcm-nopadding:0';
+    'urn:xmpp:ciphers:aes-128-gcm-nopadding:0';
+const sfsEncryptionAes256GcmNoPaddingXmlns =
+    'urn:xmpp:ciphers:aes-256-gcm-nopadding:0';
 const sfsEncryptionAes256CbcPkcs7Xmlns = 'urn:xmpp:ciphers:aes-256-cbc-pkcs7:0';
 
+// XEP-0449
+const stickersXmlns = 'urn:xmpp:stickers:0';
+
 // XEP-0461
 const replyXmlns = 'urn:xmpp:reply:0';
 const fallbackXmlns = 'urn:xmpp:feature-fallback:0';

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

@@ -0,0 +1 @@
+

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

@@ -35,28 +35,41 @@ class NegotiatorAttributes {
     this.getSocket,
     this.isAuthenticated,
   );
+
   /// Sends the nonza nonza and optionally redacts it in logs if redact is not null.
   final void Function(XMLNode nonza, {String? redact}) sendNonza;
+
   /// Returns the connection settings.
   final ConnectionSettings Function() getConnectionSettings;
+
   /// Send an event event to the connection's event bus
   final Future<void> Function(XmppEvent event) sendEvent;
+
   /// Returns the negotiator with id id of the connection or null.
-  final T? Function<T extends XmppFeatureNegotiatorBase>(String) getNegotiatorById;
+  final T? Function<T extends XmppFeatureNegotiatorBase>(String)
+      getNegotiatorById;
+
   /// Returns the manager with id id of the connection or null.
   final T? Function<T extends XmppManagerBase>(String) getManagerById;
+
   /// Returns the full JID of the current account
   final JID Function() getFullJID;
+
   /// Returns the socket the negotiator is attached to
   final BaseSocketWrapper Function() getSocket;
+
   /// Returns true if the stream is authenticated. Returns false if not.
   final bool Function() isAuthenticated;
 }
 
 abstract class XmppFeatureNegotiatorBase {
+  XmppFeatureNegotiatorBase(
+    this.priority,
+    this.sendStreamHeaderWhenDone,
+    this.negotiatingXmlns,
+    this.id,
+  ) : state = NegotiatorState.ready;
 
-  XmppFeatureNegotiatorBase(this.priority, this.sendStreamHeaderWhenDone, this.negotiatingXmlns, this.id)
-    : state = NegotiatorState.ready;
   /// The priority regarding other negotiators. The higher, the earlier will the
   /// negotiator be used
   final int priority;
@@ -87,7 +100,8 @@ abstract class XmppFeatureNegotiatorBase {
     return firstWhereOrNull(
           features,
           (XMLNode feature) => feature.attributes['xmlns'] == negotiatingXmlns,
-    ) != null;
+        ) !=
+        null;
   }
 
   /// Called with the currently received nonza [nonza] when the negotiator is active.

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

@@ -8,25 +8,38 @@ import 'package:moxxmpp/src/types/result.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/xep_0198.dart';
 import 'package:uuid/uuid.dart';
 
-class ResourceBindingFailedError extends NegotiatorError {}
+class ResourceBindingFailedError extends NegotiatorError {
+  @override
+  bool isRecoverable() => true;
+}
 
+/// A negotiator that implements resource binding against a random server-provided
+/// resource.
 class ResourceBindingNegotiator extends XmppFeatureNegotiatorBase {
+  ResourceBindingNegotiator()
+      : super(0, false, bindXmlns, resourceBindingNegotiator);
 
-  ResourceBindingNegotiator() : _requestSent = false, super(0, false, bindXmlns, resourceBindingNegotiator);
+  /// Flag indicating the state of the negotiator:
-  bool _requestSent;
+  /// - True: We sent a binding request
+  /// - False: We have not yet sent the binding request
+  bool _requestSent = false;
 
   @override
   bool matchesFeature(List<XMLNode> features) {
     final sm = attributes.getManagerById<StreamManagementManager>(smManager);
     if (sm != null) {
-      return super.matchesFeature(features) && !sm.streamResumed && attributes.isAuthenticated();
+      return super.matchesFeature(features) &&
+          !sm.streamResumed &&
+          attributes.isAuthenticated();
     }
 
     return super.matchesFeature(features) && attributes.isAuthenticated();
   }
 
   @override
-  Future<Result<NegotiatorState, NegotiatorError>> negotiate(XMLNode nonza) async {
+  Future<Result<NegotiatorState, NegotiatorError>> negotiate(
+    XMLNode nonza,
+  ) async {
     if (!_requestSent) {
       final stanza = XMLNode.xmlns(
         tag: 'iq',
@@ -55,7 +68,8 @@ class ResourceBindingNegotiator extends XmppFeatureNegotiatorBase {
       final jid = bind.firstTag('jid')!;
       final resource = jid.innerText().split('/')[1];
 
-      await attributes.sendEvent(ResourceBindingSuccessEvent(resource: resource));
+      await attributes
+          .sendEvent(ResourceBindingSuccessEvent(resource: resource));
       return const Result(NegotiatorState.done);
     }
   }

packages/moxxmpp/lib/src/negotiators/sasl/errors.dart

@@ -1,3 +1,53 @@
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
+import 'package:moxxmpp/src/stringxml.dart';
 
-class SaslFailedError extends NegotiatorError {}
+abstract class SaslError extends NegotiatorError {
+  static SaslError fromFailure(XMLNode failure) {
+    XMLNode? error;
+    for (final child in failure.children) {
+      if (child.tag == 'text') continue;
+
+      error = child;
+      break;
+    }
+
+    switch (error?.tag) {
+      case 'credentials-expired':
+        return SaslCredentialsExpiredError();
+      case 'not-authorized':
+        return SaslNotAuthorizedError();
+      case 'account-disabled':
+        return SaslAccountDisabledError();
+    }
+
+    return SaslUnspecifiedError();
+  }
+}
+
+/// Triggered when the server returned us a <not-authorized /> failure during SASL
+/// (https://xmpp.org/rfcs/rfc6120.html#sasl-errors-not-authorized).
+class SaslNotAuthorizedError extends SaslError {
+  @override
+  bool isRecoverable() => false;
+}
+
+/// Triggered when the server returned us a <credentials-expired /> failure during SASL
+/// (https://xmpp.org/rfcs/rfc6120.html#sasl-errors-credentials-expired).
+class SaslCredentialsExpiredError extends SaslError {
+  @override
+  bool isRecoverable() => false;
+}
+
+/// Triggered when the server returned us a <account-disabled /> failure during SASL
+/// (https://xmpp.org/rfcs/rfc6120.html#sasl-errors-account-disabled).
+class SaslAccountDisabledError extends SaslError {
+  @override
+  bool isRecoverable() => false;
+}
+
+/// An unspecified SASL error, i.e. everything not matched by any more precise erorr
+/// class.
+class SaslUnspecifiedError extends SaslError {
+  @override
+  bool isRecoverable() => true;
+}

packages/moxxmpp/lib/src/negotiators/sasl/kv.dart

@@ -1,7 +1,4 @@
-enum ParserState {
+enum ParserState { variableName, variableValue }
-  variableName,
-  variableValue
-}
 
 /// Parse a string like "n,,n=user,r=fyko+d2lbbFgONRv9qkxdawL" into
 /// { "n": "user", "r": "fyko+d2lbbFgONRv9qkxdawL"}.
@@ -14,7 +11,8 @@ Map<String, String> parseKeyValue(String keyValueString) {
   for (var i = 0; i < keyValueString.length; i++) {
     final char = keyValueString[i];
     switch (state) {
-      case ParserState.variableName: {
+      case ParserState.variableName:
+        {
           if (char == '=') {
             state = ParserState.variableValue;
           } else if (char == ',') {
@@ -24,7 +22,8 @@ Map<String, String> parseKeyValue(String keyValueString) {
           }
         }
         break;
-      case ParserState.variableValue: {
+      case ParserState.variableValue:
+        {
           if (char == ',' || i == keyValueString.length - 1) {
             if (char != ',') {
               value += char;

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

@@ -4,8 +4,9 @@ import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
 abstract class SaslNegotiator extends XmppFeatureNegotiatorBase {
+  SaslNegotiator(int priority, String id, this.mechanismName)
+      : super(priority, true, saslXmlns, id);
 
-  SaslNegotiator(int priority, String id, this.mechanismName) : super(priority, true, saslXmlns, id);
   /// The name inside the <mechanism /> element
   final String mechanismName;
 
@@ -22,6 +23,7 @@ abstract class SaslNegotiator extends XmppFeatureNegotiatorBase {
     return firstWhereOrNull(
           mechanisms.children,
           (XMLNode mechanism) => mechanism.text == mechanismName,
-    ) != null;
+        ) !=
+        null;
   }
 }

packages/moxxmpp/lib/src/negotiators/sasl/nonza.dart

@@ -2,7 +2,8 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
 class SaslAuthNonza extends XMLNode {
-  SaslAuthNonza(String mechanism, String body) : super(
+  SaslAuthNonza(String mechanism, String body)
+      : super(
           tag: 'auth',
           attributes: <String, String>{
             'xmlns': saslXmlns,

packages/moxxmpp/lib/src/negotiators/sasl/plain.dart

@@ -10,8 +10,10 @@ import 'package:moxxmpp/src/stringxml.dart';
 import 'package:moxxmpp/src/types/result.dart';
 
 class SaslPlainAuthNonza extends SaslAuthNonza {
-  SaslPlainAuthNonza(String username, String password) : super(
+  SaslPlainAuthNonza(String username, String password)
-    'PLAIN', base64.encode(utf8.encode('\u0000$username\u0000$password')),
+      : super(
+          'PLAIN',
+          base64.encode(utf8.encode('\u0000$username\u0000$password')),
         );
 }
 
@@ -30,7 +32,9 @@ class SaslPlainNegotiator extends SaslNegotiator {
 
     if (super.matchesFeature(features)) {
       if (!attributes.getSocket().isSecure()) {
-        _log.warning('Refusing to match SASL feature due to unsecured connection');
+        _log.warning(
+          'Refusing to match SASL feature due to unsecured connection',
+        );
         return false;
       }
 
@@ -41,7 +45,9 @@ class SaslPlainNegotiator extends SaslNegotiator {
   }
 
   @override
-  Future<Result<NegotiatorState, NegotiatorError>> negotiate(XMLNode nonza) async {
+  Future<Result<NegotiatorState, NegotiatorError>> negotiate(
+    XMLNode nonza,
+  ) async {
     if (!_authSent) {
       final settings = attributes.getConnectionSettings();
       attributes.sendNonza(
@@ -59,7 +65,9 @@ class SaslPlainNegotiator extends SaslNegotiator {
         // We assume it's a <failure/>
         final error = nonza.children.first.tag;
         await attributes.sendEvent(AuthenticationFailedEvent(error));
-        return Result(SaslFailedError());
+        return Result(
+          SaslError.fromFailure(nonza),
+        );
       }
     }
   }

packages/moxxmpp/lib/src/negotiators/sasl/scram.dart

@@ -17,28 +17,30 @@ import 'package:saslprep/saslprep.dart';
 
 // NOTE: Inspired by https://github.com/vukoye/xmpp_dart/blob/3b1a0588562b9e591488c99d834088391840911d/lib/src/features/sasl/ScramSaslHandler.dart
 
-enum ScramHashType {
+enum ScramHashType { sha1, sha256, sha512 }
-  sha1,
-  sha256,
-  sha512
-}
 
 HashAlgorithm hashFromType(ScramHashType type) {
   switch (type) {
-    case ScramHashType.sha1: return Sha1();
+    case ScramHashType.sha1:
-    case ScramHashType.sha256: return Sha256();
+      return Sha1();
-    case ScramHashType.sha512: return Sha512();
+    case ScramHashType.sha256:
+      return Sha256();
+    case ScramHashType.sha512:
+      return Sha512();
   }
 }
 
 int pbkdfBitsFromHash(ScramHashType type) {
   switch (type) {
     // NOTE: SHA1 is 20 octets long => 20 octets * 8 bits/octet
-    case ScramHashType.sha1: return 160;
+    case ScramHashType.sha1:
+      return 160;
     // NOTE: SHA256 is 32 octets long => 32 octets * 8 bits/octet
-    case ScramHashType.sha256: return 256;
+    case ScramHashType.sha256:
+      return 256;
     // NOTE: SHA512 is 64 octets long => 64 octets * 8 bits/octet
-    case ScramHashType.sha512: return 512;
+    case ScramHashType.sha512:
+      return 512;
   }
 }
 
@@ -48,30 +50,39 @@ const scramSha512Mechanism = 'SCRAM-SHA-512';
 
 String mechanismNameFromType(ScramHashType type) {
   switch (type) {
-    case ScramHashType.sha1: return scramSha1Mechanism;
+    case ScramHashType.sha1:
-    case ScramHashType.sha256: return scramSha256Mechanism;
+      return scramSha1Mechanism;
-    case ScramHashType.sha512: return scramSha512Mechanism;
+    case ScramHashType.sha256:
+      return scramSha256Mechanism;
+    case ScramHashType.sha512:
+      return scramSha512Mechanism;
   }
 }
 
 String namespaceFromType(ScramHashType type) {
   switch (type) {
-    case ScramHashType.sha1: return saslScramSha1Negotiator;
+    case ScramHashType.sha1:
-    case ScramHashType.sha256: return saslScramSha256Negotiator;
+      return saslScramSha1Negotiator;
-    case ScramHashType.sha512: return saslScramSha512Negotiator;
+    case ScramHashType.sha256:
+      return saslScramSha256Negotiator;
+    case ScramHashType.sha512:
+      return saslScramSha512Negotiator;
   }
 }
 
 class SaslScramAuthNonza extends SaslAuthNonza {
   // This subclassing makes less sense here, but this is since the auth nonza here
   // requires knowledge of the inner state of the Negotiator.
-  SaslScramAuthNonza({ required ScramHashType type, required String body }) : super(
+  SaslScramAuthNonza({required ScramHashType type, required String body})
-    mechanismNameFromType(type), body,
+      : super(
+          mechanismNameFromType(type),
+          body,
         );
 }
 
 class SaslScramResponseNonza extends XMLNode {
-  SaslScramResponseNonza({ required String body }) : super(
+  SaslScramResponseNonza({required String body})
+      : super(
           tag: 'response',
           attributes: <String, String>{
             'xmlns': saslXmlns,
@@ -80,12 +91,7 @@ class SaslScramResponseNonza extends XMLNode {
         );
 }
 
-enum ScramState {
+enum ScramState { preSent, initialMessageSent, challengeResponseSent, error }
-  preSent,
-  initialMessageSent,
-  challengeResponseSent,
-  error
-}
 
 const gs2Header = 'n,,';
 
@@ -96,12 +102,16 @@ class SaslScramNegotiator extends SaslNegotiator {
     this.initialMessageNoGS2,
     this.clientNonce,
     this.hashType,
-  ) :
+  )   : _hash = hashFromType(hashType),
-    _hash = hashFromType(hashType),
         _serverSignature = '',
         _scramState = ScramState.preSent,
-    _log = Logger('SaslScramNegotiator(${mechanismNameFromType(hashType)})'),
+        _log =
-    super(priority, namespaceFromType(hashType), mechanismNameFromType(hashType));
+            Logger('SaslScramNegotiator(${mechanismNameFromType(hashType)})'),
+        super(
+          priority,
+          namespaceFromType(hashType),
+          mechanismNameFromType(hashType),
+        );
   String? clientNonce;
   String initialMessageNoGS2;
   final ScramHashType hashType;
@@ -122,7 +132,9 @@ class SaslScramNegotiator extends SaslNegotiator {
 
     final saltedPasswordRaw = await pbkdf2.deriveKey(
       secretKey: SecretKey(
-        utf8.encode(Saslprep.saslprep(attributes.getConnectionSettings().password)),
+        utf8.encode(
+          Saslprep.saslprep(attributes.getConnectionSettings().password),
+        ),
       ),
       nonce: base64.decode(salt),
     );
@@ -131,32 +143,46 @@ class SaslScramNegotiator extends SaslNegotiator {
 
   Future<List<int>> calculateClientKey(List<int> saltedPassword) async {
     return (await Hmac(_hash).calculateMac(
-        utf8.encode('Client Key'), secretKey: SecretKey(saltedPassword),
+      utf8.encode('Client Key'),
-    )).bytes;
+      secretKey: SecretKey(saltedPassword),
+    ))
+        .bytes;
   }
 
-  Future<List<int>> calculateClientSignature(String authMessage, List<int> storedKey) async {
+  Future<List<int>> calculateClientSignature(
+    String authMessage,
+    List<int> storedKey,
+  ) async {
     return (await Hmac(_hash).calculateMac(
       utf8.encode(authMessage),
       secretKey: SecretKey(storedKey),
-    )).bytes;
+    ))
+        .bytes;
   }
 
   Future<List<int>> calculateServerKey(List<int> saltedPassword) async {
     return (await Hmac(_hash).calculateMac(
       utf8.encode('Server Key'),
       secretKey: SecretKey(saltedPassword),
-    )).bytes;
+    ))
+        .bytes;
   }
 
-  Future<List<int>> calculateServerSignature(String authMessage, List<int> serverKey) async {
+  Future<List<int>> calculateServerSignature(
+    String authMessage,
+    List<int> serverKey,
+  ) async {
     return (await Hmac(_hash).calculateMac(
       utf8.encode(authMessage),
       secretKey: SecretKey(serverKey),
-    )).bytes;
+    ))
+        .bytes;
   }
 
-  List<int> calculateClientProof(List<int> clientKey, List<int> clientSignature) {
+  List<int> calculateClientProof(
+    List<int> clientKey,
+    List<int> clientSignature,
+  ) {
     final clientProof = List<int>.filled(clientKey.length, 0);
     for (var i = 0; i < clientKey.length; i++) {
       clientProof[i] = clientKey[i] ^ clientSignature[i];
@@ -170,14 +196,20 @@ class SaslScramNegotiator extends SaslNegotiator {
     final challenge = parseKeyValue(challengeString);
     final clientFinalMessageBare = 'c=biws,r=${challenge['r']!}';
 
-    final saltedPassword = await calculateSaltedPassword(challenge['s']!, int.parse(challenge['i']!));
+    final saltedPassword = await calculateSaltedPassword(
+      challenge['s']!,
+      int.parse(challenge['i']!),
+    );
     final clientKey = await calculateClientKey(saltedPassword);
     final storedKey = (await _hash.hash(clientKey)).bytes;
-    final authMessage = '$initialMessageNoGS2,$challengeString,$clientFinalMessageBare';
+    final authMessage =
-    final clientSignature = await calculateClientSignature(authMessage, storedKey);
+        '$initialMessageNoGS2,$challengeString,$clientFinalMessageBare';
+    final clientSignature =
+        await calculateClientSignature(authMessage, storedKey);
     final clientProof = calculateClientProof(clientKey, clientSignature);
     final serverKey = await calculateServerKey(saltedPassword);
-    _serverSignature = base64.encode(await calculateServerSignature(authMessage, serverKey));
+    _serverSignature =
+        base64.encode(await calculateServerSignature(authMessage, serverKey));
 
     return '$clientFinalMessageBare,p=${base64.encode(clientProof)}';
   }
@@ -186,7 +218,9 @@ class SaslScramNegotiator extends SaslNegotiator {
   bool matchesFeature(List<XMLNode> features) {
     if (super.matchesFeature(features)) {
       if (!attributes.getSocket().isSecure()) {
-        _log.warning('Refusing to match SASL feature due to unsecured connection');
+        _log.warning(
+          'Refusing to match SASL feature due to unsecured connection',
+        );
         return false;
       }
 
@@ -197,18 +231,27 @@ class SaslScramNegotiator extends SaslNegotiator {
   }
 
   @override
-  Future<Result<NegotiatorState, NegotiatorError>> negotiate(XMLNode nonza) async {
+  Future<Result<NegotiatorState, NegotiatorError>> negotiate(
+    XMLNode nonza,
+  ) async {
     switch (_scramState) {
       case ScramState.preSent:
         if (clientNonce == null || clientNonce == '') {
-          clientNonce = randomAlphaNumeric(40, provider: CoreRandomProvider.from(Random.secure()));
+          clientNonce = randomAlphaNumeric(
+            40,
+            provider: CoreRandomProvider.from(Random.secure()),
+          );
         }
 
-        initialMessageNoGS2 = 'n=${attributes.getConnectionSettings().jid.local},r=$clientNonce';
+        initialMessageNoGS2 =
+            'n=${attributes.getConnectionSettings().jid.local},r=$clientNonce';
 
         _scramState = ScramState.initialMessageSent;
         attributes.sendNonza(
-          SaslScramAuthNonza(body: base64.encode(utf8.encode(gs2Header + initialMessageNoGS2)), type: hashType),
+          SaslScramAuthNonza(
+            body: base64.encode(utf8.encode(gs2Header + initialMessageNoGS2)),
+            type: hashType,
+          ),
           redact: SaslScramAuthNonza(body: '******', type: hashType).toXml(),
         );
         return const Result(NegotiatorState.ready);
@@ -218,7 +261,9 @@ class SaslScramNegotiator extends SaslNegotiator {
           await attributes.sendEvent(AuthenticationFailedEvent(error));
 
           _scramState = ScramState.error;
-          return Result(SaslFailedError());
+          return Result(
+            SaslError.fromFailure(nonza),
+          );
         }
 
         final challengeBase64 = nonza.innerText();
@@ -236,23 +281,30 @@ class SaslScramNegotiator extends SaslNegotiator {
           final error = nonza.children.first.tag;
           await attributes.sendEvent(AuthenticationFailedEvent(error));
           _scramState = ScramState.error;
-          return Result(SaslFailedError());
+          return Result(
+            SaslError.fromFailure(nonza),
+          );
         }
 
         // NOTE: This assumes that the string is always "v=..." and contains no other parameters
-        final signature = parseKeyValue(utf8.decode(base64.decode(nonza.innerText())));
+        final signature =
+            parseKeyValue(utf8.decode(base64.decode(nonza.innerText())));
         if (signature['v']! != _serverSignature) {
           // TODO(Unknown): Notify of a signature mismatch
           //final error = nonza.children.first.tag;
           //attributes.sendEvent(AuthenticationFailedEvent(error));
           _scramState = ScramState.error;
-          return Result(SaslFailedError());
+          return Result(
+            SaslError.fromFailure(nonza),
+          );
         }
 
         await attributes.sendEvent(AuthenticationSuccessEvent());
         return const Result(NegotiatorState.done);
       case ScramState.error:
-        return Result(SaslFailedError());
+        return Result(
+          SaslError.fromFailure(nonza),
+        );
     }
   }
 

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

@@ -5,32 +5,35 @@ import 'package:moxxmpp/src/negotiators/negotiator.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 import 'package:moxxmpp/src/types/result.dart';
 
-enum _StartTlsState {
+enum _StartTlsState { ready, requested }
-  ready,
+
-  requested
+class StartTLSFailedError extends NegotiatorError {
+  @override
+  bool isRecoverable() => true;
 }
 
-class StartTLSFailedError extends NegotiatorError {}
-
 class StartTLSNonza extends XMLNode {
-  StartTLSNonza() : super.xmlns(
+  StartTLSNonza()
+      : super.xmlns(
           tag: 'starttls',
           xmlns: startTlsXmlns,
         );
 }
 
+/// A negotiator implementing StartTLS.
 class StartTlsNegotiator extends XmppFeatureNegotiatorBase {
+  StartTlsNegotiator() : super(10, true, startTlsXmlns, startTlsNegotiator);
 
-  StartTlsNegotiator()
+  /// The state of the negotiator.
-    : _state = _StartTlsState.ready,
+  _StartTlsState _state = _StartTlsState.ready;
-      _log = Logger('StartTlsNegotiator'),
-      super(10, true, startTlsXmlns, startTlsNegotiator);
-  _StartTlsState _state;
 
-  final Logger _log;
+  /// Logger.
+  final Logger _log = Logger('StartTlsNegotiator');
 
   @override
-  Future<Result<NegotiatorState, NegotiatorError>> negotiate(XMLNode nonza) async {
+  Future<Result<NegotiatorState, NegotiatorError>> negotiate(
+    XMLNode nonza,
+  ) async {
     switch (_state) {
       case _StartTlsState.ready:
         _log.fine('StartTLS is available. Performing StartTLS upgrade...');
@@ -38,13 +41,15 @@ class StartTlsNegotiator extends XmppFeatureNegotiatorBase {
         attributes.sendNonza(StartTLSNonza());
         return const Result(NegotiatorState.ready);
       case _StartTlsState.requested:
-        if (nonza.tag != 'proceed' || nonza.attributes['xmlns'] != startTlsXmlns) {
+        if (nonza.tag != 'proceed' ||
+            nonza.attributes['xmlns'] != startTlsXmlns) {
           _log.severe('Failed to perform StartTLS negotiation');
           return Result(StartTLSFailedError());
         }
 
         _log.fine('Securing socket');
-        final result = await attributes.getSocket()
+        final result = await attributes
+            .getSocket()
             .secure(attributes.getConnectionSettings().jid.domain);
         if (!result) {
           _log.severe('Failed to secure stream');

packages/moxxmpp/lib/src/ping.dart

@@ -4,17 +4,15 @@ import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/xeps/xep_0198/xep_0198.dart';
 
 class PingManager extends XmppManagerBase {
-  @override
+  PingManager() : super(pingManager);
-  String getId() => pingManager;
-
-  @override
-  String getName() => 'PingManager';
 
   @override
   Future<bool> isSupported() async => true;
 
   void _logWarning() {
-    logger.warning('Cannot send keepalives as SM is not available, the socket disallows whitespace pings and does not manage its own keepalives. Cannot guarantee that the connection survives.');
+    logger.warning(
+      'Cannot send keepalives as SM is not available, the socket disallows whitespace pings and does not manage its own keepalives. Cannot guarantee that the connection survives.',
+    );
   }
 
   @override
@@ -29,13 +27,17 @@ class PingManager extends XmppManagerBase {
         return;
       }
 
-      final stream = attrs.getManagerById(smManager) as StreamManagementManager?;
+      final stream =
+          attrs.getManagerById(smManager) as StreamManagementManager?;
       if (stream != null) {
-        if (stream.isStreamManagementEnabled() /*&& stream.getUnackedStanzaCount() > 0*/) {
+        if (stream
+            .isStreamManagementEnabled() /*&& stream.getUnackedStanzaCount() > 0*/) {
           logger.finest('Sending an ack ping as Stream Management is enabled');
           stream.sendAckRequestPing();
         } else if (attrs.getSocket().whitespacePingAllowed()) {
-          logger.finest('Sending a whitespace ping as Stream Management is not enabled');
+          logger.finest(
+            'Sending a whitespace ping as Stream Management is not enabled',
+          );
           attrs.getConnection().sendWhitespacePing();
         } else {
           _logWarning();

packages/moxxmpp/lib/src/presence.dart

@@ -8,23 +8,20 @@ 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/xep_0030/types.dart';
-import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
-import 'package:moxxmpp/src/xeps/xep_0115.dart';
-import 'package:moxxmpp/src/xeps/xep_0414.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 mandatory manager that handles initial presence sending, sending of subscription
+/// request management requests and triggers events for incoming presence stanzas.
 class PresenceManager extends XmppManagerBase {
-  PresenceManager(this._capHashNode) : _capabilityHash = null, super();
+  PresenceManager() : super(presenceManager);
-  String? _capabilityHash;
-  final String _capHashNode;
 
-  String get capabilityHashNode => _capHashNode;
+  /// The list of pre-send callbacks.
-  
+  final List<PresencePreSendCallback> _presenceCallbacks =
-  @override
+      List.empty(growable: true);
-  String getId() => presenceManager;
-
-  @override
-  String getName() => 'PresenceManager';
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -40,66 +37,63 @@ class PresenceManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onPresence(Stanza presence, StanzaHandlerData state) async {
+  /// Register the pre-send callback [callback].
+  void registerPreSendCallback(PresencePreSendCallback callback) {
+    _presenceCallbacks.add(callback);
+  }
+
+  Future<StanzaHandlerData> _onPresence(
+    Stanza presence,
+    StanzaHandlerData state,
+  ) async {
     final attrs = getAttributes();
     switch (presence.type) {
       case 'subscribe':
-      case 'subscribed': {
+      case 'subscribed':
+        {
           attrs.sendEvent(
-          SubscriptionRequestReceivedEvent(from: JID.fromString(presence.from!)),
+            SubscriptionRequestReceivedEvent(
+              from: JID.fromString(presence.from!),
+            ),
           );
           return state.copyWith(done: true);
         }
-      default: break;
+      default:
+        break;
     }
 
     if (presence.from != null) {
       logger.finest("Received presence from '${presence.from}'");
 
-      getAttributes().sendEvent(PresenceReceivedEvent(JID.fromString(presence.from!), presence));
+      getAttributes().sendEvent(
+        PresenceReceivedEvent(JID.fromString(presence.from!), presence),
+      );
       return state.copyWith(done: true);
     }
 
     return state;
   }
 
-  /// Returns the capability hash.
-  Future<String> getCapabilityHash() async {
-    final manager = getAttributes().getManagerById(discoManager)! as DiscoManager;
-    _capabilityHash ??= await calculateCapabilityHash(
-      DiscoInfo(
-        manager.getRegisteredDiscoFeatures(),
-        manager.getIdentities(),
-        [],
-        getAttributes().getFullJID(),
-      ),
-      getHashByName('sha-1')!,
-    );
-
-    return _capabilityHash!;
-  }
-  
   /// Sends the initial presence to enable receiving messages.
   Future<void> sendInitialPresence() async {
-    final attrs = getAttributes();
+    final children = List<XMLNode>.from([
-    attrs.sendNonza(
-      Stanza.presence(
-        from: attrs.getFullJID().toString(),
-        children: [
       XMLNode(
         tag: 'show',
         text: 'chat',
       ),
-          XMLNode.xmlns(
+    ]);
-            tag: 'c',
+
-            xmlns: capsXmlns,
+    for (final callback in _presenceCallbacks) {
-            attributes: {
+      children.addAll(
-              'hash': 'sha-1',
+        await callback(),
-              'node': _capHashNode,
+      );
-              'ver': await getCapabilityHash()
+    }
-            },
+
-          )
+    final attrs = getAttributes();
-        ],
+    attrs.sendNonza(
+      Stanza.presence(
+        from: attrs.getFullJID().toString(),
+        children: children,
       ),
     );
   }

packages/moxxmpp/lib/src/reconnect.dart

@@ -2,29 +2,45 @@ import 'dart:async';
 import 'dart:math';
 import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
+import 'package:moxxmpp/src/util/queue.dart';
 import 'package:synchronized/synchronized.dart';
 
-abstract class ReconnectionPolicy {
+/// A callback function to be called when the connection to the server has been lost.
+typedef ConnectionLostCallback = Future<void> Function();
 
-  ReconnectionPolicy()
+/// A function that, when called, causes the XmppConnection to connect to the server, if
-    : _shouldAttemptReconnection = false,
+/// another reconnection is not already running.
-      _isReconnecting = false,
+typedef PerformReconnectFunction = Future<void> Function();
-      _isReconnectingLock = Lock();
+
+abstract class ReconnectionPolicy {
   /// Function provided by XmppConnection that allows the policy
   /// to perform a reconnection.
-  Future<void> Function()? performReconnect;
+  PerformReconnectFunction? performReconnect;
+
   /// Function provided by XmppConnection that allows the policy
   /// to say that we lost the connection.
-  void Function()? triggerConnectionLost;
+  ConnectionLostCallback? triggerConnectionLost;
+
   /// Indicate if should try to reconnect.
-  bool _shouldAttemptReconnection;
+  bool _shouldAttemptReconnection = false;
+
   /// Indicate if a reconnection attempt is currently running.
-  bool _isReconnecting;
+  @protected
+  bool isReconnecting = false;
+
   /// And the corresponding lock
-  final Lock _isReconnectingLock;
+  @protected
+  final Lock lock = Lock();
+
+  /// The lock for accessing [_shouldAttemptReconnection]
+  @protected
+  final Lock shouldReconnectLock = Lock();
 
   /// Called by XmppConnection to register the policy.
-  void register(Future<void> Function() performReconnect, void Function() triggerConnectionLost) {
+  void register(
+    PerformReconnectFunction performReconnect,
+    ConnectionLostCallback triggerConnectionLost,
+  ) {
     this.performReconnect = performReconnect;
     this.triggerConnectionLost = triggerConnectionLost;
 
@@ -42,91 +58,131 @@ abstract class ReconnectionPolicy {
   /// Caled by the XmppConnection when the reconnection was successful.
   Future<void> onSuccess();
 
-  bool get shouldReconnect => _shouldAttemptReconnection;
+  Future<bool> getShouldReconnect() async {
+    return shouldReconnectLock.synchronized(() => _shouldAttemptReconnection);
+  }
 
   /// Set whether a reconnection attempt should be made.
-  void setShouldReconnect(bool value) {
+  Future<void> setShouldReconnect(bool value) async {
-    _shouldAttemptReconnection = value;
+    return shouldReconnectLock
+        .synchronized(() => _shouldAttemptReconnection = value);
   }
 
   /// Returns true if the manager is currently triggering a reconnection. If not, returns
   /// false.
   Future<bool> isReconnectionRunning() async {
-    return _isReconnectingLock.synchronized(() => _isReconnecting);
+    return lock.synchronized(() => isReconnecting);
   }
 
-  /// Set the _isReconnecting state to [value].
+  /// Set the isReconnecting state to [value].
   @protected
   Future<void> setIsReconnecting(bool value) async {
-    await _isReconnectingLock.synchronized(() async {
+    await lock.synchronized(() async {
-      _isReconnecting = value;
+      isReconnecting = value;
-    });
-  }
-
-  @protected
-  Future<bool> testAndSetIsReconnecting() async {
-    return _isReconnectingLock.synchronized(() {
-      if (_isReconnecting) {
-        return false;
-      } else {
-        _isReconnecting = true;
-        return true;
-      }
     });
   }
 }
 
 /// A simple reconnection strategy: Make the reconnection delays exponentially longer
 /// for every failed attempt.
-class ExponentialBackoffReconnectionPolicy extends ReconnectionPolicy {
+/// NOTE: This ReconnectionPolicy may be broken
-
+class RandomBackoffReconnectionPolicy extends ReconnectionPolicy {
-  ExponentialBackoffReconnectionPolicy(this._maxBackoffTime)
+  RandomBackoffReconnectionPolicy(
-  : _counter = 0,
+    this._minBackoffTime,
-    _log = Logger('ExponentialBackoffReconnectionPolicy'),
+    this._maxBackoffTime,
+  )   : assert(
+          _minBackoffTime < _maxBackoffTime,
+          '_minBackoffTime must be smaller than _maxBackoffTime',
+        ),
         super();
+
+  /// The maximum time in seconds that a backoff should be.
   final int _maxBackoffTime;
-  int _counter;
+
+  /// The minimum time in seconds that a backoff should be.
+  final int _minBackoffTime;
+
+  /// Backoff timer.
   Timer? _timer;
-  final Logger _log;
+
+  final Lock _timerLock = Lock();
+
+  /// Logger.
+  final Logger _log = Logger('RandomBackoffReconnectionPolicy');
+
+  /// Event queue
+  final AsyncQueue _eventQueue = AsyncQueue();
 
   /// Called when the backoff expired
   Future<void> _onTimerElapsed() async {
-    final isReconnecting = await isReconnectionRunning();
+    _log.fine('Timer elapsed. Waiting for lock');
-    if (shouldReconnect) {
+    await lock.synchronized(() async {
-      if (!isReconnecting) {
+      _log.fine('Lock aquired');
-        await setIsReconnecting(true);
+      if (!(await getShouldReconnect())) {
+        _log.fine(
+          'Backoff timer expired but getShouldReconnect() returned false',
+        );
+        return;
+      }
+
+      if (isReconnecting) {
+        _log.fine(
+          'Backoff timer expired but a reconnection is running, so doing nothing.',
+        );
+        return;
+      }
+
+      _log.fine('Triggering reconnect');
+      isReconnecting = true;
       await performReconnect!();
-      } else {
+    });
-        // Should never happen.
+
-        _log.fine('Backoff timer expired but reconnection is running, so doing nothing.');
+    await _timerLock.synchronized(() {
-      }
+      _timer?.cancel();
+      _timer = null;
+    });
   }
+
+  Future<void> _reset() async {
+    _log.finest('Resetting internal state');
+
+    await _timerLock.synchronized(() {
+      _timer?.cancel();
+      _timer = null;
+    });
+
+    await setIsReconnecting(false);
   }
 
   @override
   Future<void> reset() async {
-    _log.finest('Resetting internal state');
+    // ignore: unnecessary_lambdas
-    _counter = 0;
+    await _eventQueue.addJob(() => _reset());
-    await setIsReconnecting(false);
-
-    if (_timer != null) {
-      _timer!.cancel();
-      _timer = null;
   }
+
+  Future<void> _onFailure() async {
+    final shouldContinue = await _timerLock.synchronized(() {
+      return _timer == null;
+    });
+    if (!shouldContinue) {
+      _log.finest(
+        '_onFailure: Not backing off since _timer is already running',
+      );
+      return;
+    }
+
+    final seconds =
+        Random().nextInt(_maxBackoffTime - _minBackoffTime) + _minBackoffTime;
+    _log.finest('Failure occured. Starting random backoff with ${seconds}s');
+    _timer?.cancel();
+
+    _timer = Timer(Duration(seconds: seconds), _onTimerElapsed);
   }
 
   @override
   Future<void> onFailure() async {
-    _log.finest('Failure occured. Starting exponential backoff');
+    // ignore: unnecessary_lambdas
-    _counter++;
+    await _eventQueue.addJob(() => _onFailure());
-
-    if (_timer != null) {
-      _timer!.cancel();
-    }
-
-    // Wait at max 80 seconds.
-    final seconds = min(min(pow(2, _counter).toInt(), 80), _maxBackoffTime);
-    _timer = Timer(Duration(seconds: seconds), _onTimerElapsed);
   }
 
   @override
@@ -135,7 +191,7 @@ class ExponentialBackoffReconnectionPolicy extends ReconnectionPolicy {
   }
 }
 
-/// A stub reconnection policy for tests
+/// A stub reconnection policy for tests.
 @visibleForTesting
 class TestingReconnectionPolicy extends ReconnectionPolicy {
   TestingReconnectionPolicy() : super();

packages/moxxmpp/lib/src/rfcs/rfc_4790.dart

@@ -24,3 +24,28 @@ int ioctetSortComparator(String a, String b) {
 
   return 1;
 }
+
+int ioctetSortComparatorRaw(List<int> a, List<int> b) {
+  if (a.isEmpty && b.isEmpty) {
+    return 0;
+  }
+
+  if (a.isEmpty && b.isNotEmpty) {
+    return -1;
+  }
+
+  if (a.isNotEmpty && b.isEmpty) {
+    return 1;
+  }
+
+  if (a[0] == b[0]) {
+    return ioctetSortComparatorRaw(a.sublist(1), b.sublist(1));
+  }
+
+  // TODO(Unknown): Is this correct?
+  if (a[0] < b[0]) {
+    return -1;
+  }
+
+  return 1;
+}

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

@@ -1,5 +1,8 @@
-import 'package:moxxmpp/src/events.dart';
+import 'dart:async';
+import 'package:collection/collection.dart';
+import 'package:meta/meta.dart';
 import 'package:moxxmpp/src/jid.dart';
+import 'package:moxxmpp/src/managers/attributes.dart';
 import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
@@ -8,47 +11,83 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/namespaces.dart';
 import 'package:moxxmpp/src/negotiators/negotiator.dart';
 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 {
-  XmppRosterItem({ required this.jid, required this.subscription, this.ask, this.name, this.groups = const [] });
+  const XmppRosterItem({
+    required this.jid,
+    required this.subscription,
+    this.ask,
+    this.name,
+    this.groups = const [],
+  });
   final String jid;
   final String? name;
   final String subscription;
   final String? ask;
   final List<String> groups;
+
+  @override
+  bool operator ==(Object other) {
+    return other is XmppRosterItem &&
+        other.jid == jid &&
+        other.name == name &&
+        other.subscription == subscription &&
+        other.ask == ask &&
+        const ListEquality<String>().equals(other.groups, groups);
   }
 
-enum RosterRemovalResult {
+  @override
-  okay,
+  int get hashCode =>
-  error,
+      jid.hashCode ^
-  itemNotFound
+      name.hashCode ^
+      subscription.hashCode ^
+      ask.hashCode ^
+      groups.hashCode;
+
+  @override
+  String toString() {
+    return 'XmppRosterItem('
+        'jid: $jid, '
+        'name: $name, '
+        'subscription: $subscription, '
+        'ask: $ask, '
+        'groups: $groups)';
   }
+}
+
+enum RosterRemovalResult { okay, error, itemNotFound }
 
 class RosterRequestResult {
-  RosterRequestResult({ required this.items, this.ver });
+  RosterRequestResult(this.items, this.ver);
   List<XmppRosterItem> items;
   String? ver;
 }
 
-class RosterPushEvent extends XmppEvent {
+class RosterPushResult {
-  RosterPushEvent({ required this.item, this.ver });
+  RosterPushResult(this.item, this.ver);
   final XmppRosterItem item;
   final String? ver;
 }
 
 /// A Stub feature negotiator for finding out whether roster versioning is supported.
 class RosterFeatureNegotiator extends XmppFeatureNegotiatorBase {
-  RosterFeatureNegotiator() : _supported = false, super(11, false, rosterVersioningXmlns, rosterNegotiator);
+  RosterFeatureNegotiator()
+      : _supported = false,
+        super(11, false, rosterVersioningXmlns, rosterNegotiator);
 
   /// True if rosterVersioning is supported. False otherwise.
   bool _supported;
   bool get isSupported => _supported;
 
   @override
-  Future<Result<NegotiatorState, NegotiatorError>> negotiate(XMLNode nonza) async {
+  Future<Result<NegotiatorState, NegotiatorError>> negotiate(
+    XMLNode nonza,
+  ) async {
     // negotiate is only called when the negotiator matched, meaning the server
     // advertises roster versioning.
     _supported = true;
@@ -65,15 +104,16 @@ class RosterFeatureNegotiator extends XmppFeatureNegotiatorBase {
 
 /// This manager requires a RosterFeatureNegotiator to be registered.
 class RosterManager extends XmppManagerBase {
+  RosterManager(this._stateManager) : super(rosterManager);
 
-  RosterManager() : _rosterVersion = null, super();
+  /// The class managing the entire roster state.
-  String? _rosterVersion;
+  final BaseRosterStateManager _stateManager;
 
   @override
-  String getId() => rosterManager;
+  void register(XmppManagerAttributes attributes) {
-
+    super.register(attributes);
-  @override
+    _stateManager.register(attributes.sendEvent);
-  String getName() => 'RosterManager';
+  }
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -88,17 +128,10 @@ class RosterManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  /// Override-able functions
+  Future<StanzaHandlerData> _onRosterPush(
-  Future<void> commitLastRosterVersion(String version) async {}
+    Stanza stanza,
-  Future<void> loadLastRosterVersion() async {}
+    StanzaHandlerData state,
-
+  ) async {
-  void setRosterVersion(String ver) {
-    assert(_rosterVersion == null, 'A roster version must not be empty');
-
-    _rosterVersion = ver;
-  }
- 
-  Future<StanzaHandlerData> _onRosterPush(Stanza stanza, StanzaHandlerData state) async {
     final attrs = getAttributes();
     final from = stanza.attributes['from'] as String?;
     final selfJid = attrs.getConnectionSettings().jid;
@@ -109,11 +142,14 @@ class RosterManager extends XmppManagerBase {
     // - empty, i.e. not set
     // - a full JID of our own
     if (from != null && JID.fromString(from).toBare() != selfJid) {
-      logger.warning('Roster push invalid! Unexpected from attribute: ${stanza.toXml()}');
+      logger.warning(
+        'Roster push invalid! Unexpected from attribute: ${stanza.toXml()}',
+      );
       return state.copyWith(done: true);
     }
 
     final query = stanza.firstTag('query', xmlns: rosterXmlns)!;
+    logger.fine('Roster push: ${query.toXml()}');
     final item = query.firstTag('item');
 
     if (item == null) {
@@ -121,95 +157,106 @@ class RosterManager extends XmppManagerBase {
       return state.copyWith(done: true);
     }
 
-    if (query.attributes['ver'] != null) {
+    unawaited(
-      final ver = query.attributes['ver']! as String;
+      _stateManager.handleRosterPush(
-      await commitLastRosterVersion(ver);
+        RosterPushResult(
-      _rosterVersion = ver;
+          XmppRosterItem(
-    }
-    
-    attrs.sendEvent(RosterPushEvent(
-      item: XmppRosterItem(
             jid: item.attributes['jid']! as String,
             subscription: item.attributes['subscription']! as String,
             ask: item.attributes['ask'] as String?,
             name: item.attributes['name'] as String?,
           ),
-      ver: query.attributes['ver'] as String?,
+          query.attributes['ver'] as String?,
-    ),);
+        ),
-    await attrs.sendStanza(stanza.reply());
+      ),
+    );
+
+    await reply(
+      state,
+      'result',
+      [],
+    );
 
     return state.copyWith(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.
-  Future<Result<RosterRequestResult, RosterError>> _handleRosterResponse(XMLNode? query) async {
+  Future<Result<RosterRequestResult, RosterError>> _handleRosterResponse(
+    XMLNode? query,
+  ) async {
     final List<XmppRosterItem> items;
+    String? rosterVersion;
     if (query != null) {
-      items = query.children.map((item) => XmppRosterItem(
+      items = query.children
+          .map(
+            (item) => XmppRosterItem(
               name: item.attributes['name'] as String?,
               jid: item.attributes['jid']! as String,
               subscription: item.attributes['subscription']! as String,
               ask: item.attributes['ask'] as String?,
-        groups: item.findTags('group').map((groupNode) => groupNode.innerText()).toList(),
+              groups: item
-      ),).toList();
+                  .findTags('group')
+                  .map((groupNode) => groupNode.innerText())
+                  .toList(),
+            ),
+          )
+          .toList();
 
-      if (query.attributes['ver'] != null) {
+      rosterVersion = query.attributes['ver'] as String?;
-        final ver_ = query.attributes['ver']! as String;
-        await commitLastRosterVersion(ver_);
-        _rosterVersion = ver_;
-      }
     } 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');
+      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',
+      );
       return Result(NoQueryError());
     }
 
-    final ver = query.attributes['ver'] as String?;
+    final result = RosterRequestResult(
-    if (ver != null) {
+      items,
-      _rosterVersion = ver;
+      rosterVersion,
-      await commitLastRosterVersion(ver);
-    }
-    
-    return Result(
-      RosterRequestResult(
-        items: items,
-        ver: ver,
-      ),
     );
 
+    unawaited(
+      _stateManager.handleRosterFetch(result),
+    );
+
+    return Result(result);
   }
 
-  /// Requests the roster following RFC 6121 without using roster versioning.
+  /// Requests the roster following RFC 6121.
   Future<Result<RosterRequestResult, RosterError>> requestRoster() async {
     final attrs = getAttributes();
+    final query = XMLNode.xmlns(
+      tag: 'query',
+      xmlns: rosterXmlns,
+    );
+    final rosterVersion = await _stateManager.getRosterVersion();
+    if (rosterVersion != null && rosterVersioningAvailable()) {
+      query.attributes['ver'] = rosterVersion;
+    }
+
     final response = await attrs.sendStanza(
       Stanza.iq(
         type: 'get',
         children: [
-          XMLNode.xmlns(
+          query,
-            tag: 'query',
-            xmlns: rosterXmlns,
-          )
         ],
       ),
     );
 
     if (response.attributes['type'] != 'result') {
-      logger.warning('Error requesting roster without roster versioning: ${response.toXml()}');
+      logger.warning('Error requesting roster: ${response.toXml()}');
       return Result(UnknownError());
     }
 
-    final query = response.firstTag('query', xmlns: rosterXmlns);
+    final responseQuery = response.firstTag('query', xmlns: rosterXmlns);
-    return _handleRosterResponse(query);
+    return _handleRosterResponse(responseQuery);
   }
 
   /// Requests a series of roster pushes according to RFC6121. Requires that the server
   /// advertises urn:xmpp:features:rosterver in the stream features.
-  Future<Result<RosterRequestResult?, RosterError>> requestRosterPushes() async {
+  Future<Result<RosterRequestResult?, RosterError>>
-    if (_rosterVersion == null) {
+      requestRosterPushes() async {
-      await loadLastRosterVersion();
-    }
-
     final attrs = getAttributes();
     final result = await attrs.sendStanza(
       Stanza.iq(
@@ -219,7 +266,7 @@ class RosterManager extends XmppManagerBase {
             tag: 'query',
             xmlns: rosterXmlns,
             attributes: {
-              'ver': _rosterVersion ?? ''
+              'ver': await _stateManager.getRosterVersion() ?? '',
             },
           )
         ],
@@ -236,12 +283,18 @@ class RosterManager extends XmppManagerBase {
   }
 
   bool rosterVersioningAvailable() {
-    return getAttributes().getNegotiatorById<RosterFeatureNegotiator>(rosterNegotiator)!.isSupported;
+    return getAttributes()
+        .getNegotiatorById<RosterFeatureNegotiator>(rosterNegotiator)!
+        .isSupported;
   }
 
   /// Attempts to add [jid] with a title of [title] and groups [groups] to the roster.
   /// Returns true if the process was successful, false otherwise.
-  Future<bool> addToRoster(String jid, String title, { List<String>? groups }) async {
+  Future<bool> addToRoster(
+    String jid,
+    String title, {
+    List<String>? groups,
+  }) async {
     final attrs = getAttributes();
     final response = await attrs.sendStanza(
       Stanza.iq(
@@ -255,9 +308,13 @@ class RosterManager extends XmppManagerBase {
                 tag: 'item',
                 attributes: <String, String>{
                   'jid': jid,
-                  ...title == jid.split('@')[0] ? <String, String>{} : <String, String>{ 'name': title }
+                  ...title == jid.split('@')[0]
+                      ? <String, String>{}
+                      : <String, String>{'name': title}
                 },
-                children: (groups ?? []).map((group) => XMLNode(tag: 'group', text: group)).toList(),
+                children: (groups ?? [])
+                    .map((group) => XMLNode(tag: 'group', text: group))
+                    .toList(),
               )
             ],
           )

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

@@ -0,0 +1,235 @@
+import 'package:meta/meta.dart';
+import 'package:moxxmpp/src/events.dart';
+import 'package:moxxmpp/src/roster/roster.dart';
+import 'package:synchronized/synchronized.dart';
+
+class _RosterProcessTriple {
+  const _RosterProcessTriple(this.removed, this.modified, this.added);
+  final String? removed;
+  final XmppRosterItem? modified;
+  final XmppRosterItem? added;
+}
+
+class RosterCacheLoadResult {
+  const RosterCacheLoadResult(this.version, this.roster);
+  final String? version;
+  final List<XmppRosterItem> roster;
+}
+
+/// This class manages the roster state in order to correctly process and persist
+/// roster pushes and facilitate roster versioning requests.
+abstract class BaseRosterStateManager {
+  /// The cached version of the roster. If null, then it has not been loaded yet.
+  List<XmppRosterItem>? _currentRoster;
+
+  /// The cached version of the roster version.
+  String? _currentVersion;
+
+  /// A critical section locking both _currentRoster and _currentVersion.
+  final Lock _lock = Lock();
+
+  /// A function to send an XmppEvent to moxxmpp's main event bus
+  late void Function(XmppEvent) _sendEvent;
+
+  /// Overrideable function
+  /// Loads the old cached version of the roster and optionally that roster version
+  /// from persistent storage into a RosterCacheLoadResult object.
+  Future<RosterCacheLoadResult> loadRosterCache();
+
+  /// Overrideable function
+  /// Commits the roster data to persistent storage.
+  ///
+  /// [version] is the roster version string. If none was provided, then this value
+  /// is null.
+  ///
+  /// [removed] is a (possibly empty) list of bare JIDs that are removed from the
+  /// roster.
+  ///
+  /// [modified] is a (possibly empty) list of XmppRosterItems that are modified. Correlation with
+  /// the cache is done using its jid attribute.
+  ///
+  /// [added] is a (possibly empty) list of XmppRosterItems that are added by the
+  /// roster push or roster fetch request.
+  Future<void> commitRoster(
+    String? version,
+    List<String> removed,
+    List<XmppRosterItem> modified,
+    List<XmppRosterItem> added,
+  );
+
+  /// Internal function. Registers functions from the RosterManger against this
+  /// instance.
+  void register(void Function(XmppEvent) sendEvent) {
+    _sendEvent = sendEvent;
+  }
+
+  /// Load and cache or return the cached roster version.
+  Future<String?> getRosterVersion() async {
+    return _lock.synchronized(() async {
+      await _loadRosterCache();
+
+      return _currentVersion;
+    });
+  }
+
+  /// A wrapper around _commitRoster that also sends an event to moxxmpp's event
+  /// bus.
+  Future<void> _commitRoster(
+    String? version,
+    List<String> removed,
+    List<XmppRosterItem> modified,
+    List<XmppRosterItem> added,
+  ) async {
+    _sendEvent(
+      RosterUpdatedEvent(
+        removed,
+        modified,
+        added,
+      ),
+    );
+
+    await commitRoster(version, removed, modified, added);
+  }
+
+  /// Loads the cached roster data into memory, if that has not already happened.
+  /// NOTE: Must be called from within the _lock critical section.
+  Future<void> _loadRosterCache() async {
+    if (_currentRoster == null) {
+      final result = await loadRosterCache();
+
+      _currentRoster = result.roster;
+      _currentVersion = result.version;
+    }
+  }
+
+  /// Processes only single XmppRosterItem [item].
+  /// NOTE: Requires to be called from within the _lock critical section.
+  _RosterProcessTriple _handleRosterItem(XmppRosterItem item) {
+    if (item.subscription == 'remove') {
+      // The item has been removed
+      _currentRoster!.removeWhere((i) => i.jid == item.jid);
+      return _RosterProcessTriple(
+        item.jid,
+        null,
+        null,
+      );
+    }
+
+    final index = _currentRoster!.indexWhere((i) => i.jid == item.jid);
+    if (index == -1) {
+      // The item does not exist
+      _currentRoster!.add(item);
+      return _RosterProcessTriple(
+        null,
+        null,
+        item,
+      );
+    } else if (_currentRoster![index] != item) {
+      // The item is updated
+      _currentRoster![index] = item;
+      return _RosterProcessTriple(
+        null,
+        item,
+        null,
+      );
+    }
+
+    // Item has not been modified or added
+    return const _RosterProcessTriple(
+      null,
+      null,
+      null,
+    );
+  }
+
+  /// Handles a roster push from the RosterManager.
+  Future<void> handleRosterPush(RosterPushResult event) async {
+    await _lock.synchronized(() async {
+      await _loadRosterCache();
+
+      _currentVersion = event.ver;
+      final result = _handleRosterItem(event.item);
+
+      if (result.removed != null) {
+        return _commitRoster(
+          _currentVersion,
+          [result.removed!],
+          [],
+          [],
+        );
+      } else if (result.modified != null) {
+        return _commitRoster(
+          _currentVersion,
+          [],
+          [result.modified!],
+          [],
+        );
+      } else if (result.added != null) {
+        return _commitRoster(
+          _currentVersion,
+          [],
+          [],
+          [result.added!],
+        );
+      }
+    });
+  }
+
+  /// Handles the result from a roster fetch.
+  Future<void> handleRosterFetch(RosterRequestResult result) async {
+    await _lock.synchronized(() async {
+      final removed = List<String>.empty(growable: true);
+      final modified = List<XmppRosterItem>.empty(growable: true);
+      final added = List<XmppRosterItem>.empty(growable: true);
+
+      await _loadRosterCache();
+
+      _currentVersion = result.ver;
+      for (final item in result.items) {
+        final result = _handleRosterItem(item);
+
+        if (result.removed != null) removed.add(result.removed!);
+        if (result.modified != null) modified.add(result.modified!);
+        if (result.added != null) added.add(result.added!);
+      }
+
+      await _commitRoster(
+        _currentVersion,
+        removed,
+        modified,
+        added,
+      );
+    });
+  }
+
+  @visibleForTesting
+  List<XmppRosterItem> getRosterItems() => _currentRoster!;
+}
+
+@visibleForTesting
+class TestingRosterStateManager extends BaseRosterStateManager {
+  TestingRosterStateManager(
+    this.initialRosterVersion,
+    this.initialRoster,
+  );
+  final String? initialRosterVersion;
+  final List<XmppRosterItem> initialRoster;
+  int loadCount = 0;
+
+  @override
+  Future<RosterCacheLoadResult> loadRosterCache() async {
+    loadCount++;
+    return RosterCacheLoadResult(
+      initialRosterVersion,
+      initialRoster,
+    );
+  }
+
+  @override
+  Future<void> commitRoster(
+    String? version,
+    List<String> removed,
+    List<XmppRosterItem> modified,
+    List<XmppRosterItem> added,
+  ) async {}
+}

packages/moxxmpp/lib/src/routing.dart

@@ -1,6 +1 @@
-enum RoutingState {
+enum RoutingState { error, preConnection, negotiating, handleStanzas }
-  error,
-  preConnection,
-  negotiating,
-  handleStanzas
-}

packages/moxxmpp/lib/src/settings.dart

@@ -1,8 +1,12 @@
 import 'package:moxxmpp/src/jid.dart';
 
 class ConnectionSettings {
-
+  ConnectionSettings({
-  ConnectionSettings({ required this.jid, required this.password, required this.useDirectTLS, required this.allowPlainAuth });
+    required this.jid,
+    required this.password,
+    required this.useDirectTLS,
+    required this.allowPlainAuth,
+  });
   final JID jid;
   final String password;
   final bool useDirectTLS;

packages/moxxmpp/lib/src/socket.dart

@@ -5,13 +5,17 @@ abstract class XmppSocketEvent {}
 
 /// Triggered by the socket when an error occurs.
 class XmppSocketErrorEvent extends XmppSocketEvent {
-
   XmppSocketErrorEvent(this.error);
   final Object error;
 }
 
 /// Triggered when the socket is closed
-class XmppSocketClosureEvent extends XmppSocketEvent {}
+class XmppSocketClosureEvent extends XmppSocketEvent {
+  XmppSocketClosureEvent(this.expected);
+
+  /// Indicate that the socket did not close unexpectedly.
+  final bool expected;
+}
 
 /// This class is the base for a socket that XmppConnection can use.
 abstract class BaseSocketWrapper {

packages/moxxmpp/lib/src/stanza.dart

@@ -25,59 +25,83 @@ class StanzaError {
 
 class Stanza extends XMLNode {
   // ignore: use_super_parameters
-  Stanza({ this.to, this.from, this.type, this.id, List<XMLNode> children = const [], required String tag, Map<String, String> attributes = const {} }) : super(
+  Stanza({
+    this.to,
+    this.from,
+    this.type,
+    this.id,
+    List<XMLNode> children = const [],
+    required String tag,
+    Map<String, String> attributes = const {},
+  }) : super(
           tag: tag,
           attributes: <String, dynamic>{
             ...attributes,
-      ...type != null ? <String, dynamic>{ 'type': type } : <String, dynamic>{},
+            ...type != null
+                ? <String, dynamic>{'type': type}
+                : <String, dynamic>{},
             ...id != null ? <String, dynamic>{'id': id} : <String, dynamic>{},
             ...to != null ? <String, dynamic>{'to': to} : <String, dynamic>{},
-      ...from != null ? <String, dynamic>{ 'from': from } : <String, dynamic>{},
+            ...from != null
+                ? <String, dynamic>{'from': from}
+                : <String, dynamic>{},
             'xmlns': stanzaXmlns
           },
           children: children,
         );
 
-  factory Stanza.iq({ String? to, String? from, String? type, String? id, List<XMLNode> children = const [], Map<String, String>? attributes = const {} }) {
+  factory Stanza.iq({
+    String? to,
+    String? from,
+    String? type,
+    String? id,
+    List<XMLNode> children = const [],
+    Map<String, String>? attributes = const {},
+  }) {
     return Stanza(
       tag: 'iq',
       from: from,
       to: to,
       id: id,
       type: type,
-      attributes: <String, String>{
+      attributes: <String, String>{...attributes!, 'xmlns': stanzaXmlns},
-        ...attributes!,
-        'xmlns': stanzaXmlns
-      },
       children: children,
     );
   }
 
-  factory Stanza.presence({ String? to, String? from, String? type, String? id, List<XMLNode> children = const [], Map<String, String>? attributes = const {} }) {
+  factory Stanza.presence({
+    String? to,
+    String? from,
+    String? type,
+    String? id,
+    List<XMLNode> children = const [],
+    Map<String, String>? attributes = const {},
+  }) {
     return Stanza(
       tag: 'presence',
       from: from,
       to: to,
       id: id,
       type: type,
-      attributes: <String, String>{
+      attributes: <String, String>{...attributes!, 'xmlns': stanzaXmlns},
-        ...attributes!,
-        'xmlns': stanzaXmlns
-      },
       children: children,
     );
   }
-  factory Stanza.message({ String? to, String? from, String? type, String? id, List<XMLNode> children = const [], Map<String, String>? attributes = const {} }) {
+  factory Stanza.message({
+    String? to,
+    String? from,
+    String? type,
+    String? id,
+    List<XMLNode> children = const [],
+    Map<String, String>? attributes = const {},
+  }) {
     return Stanza(
       tag: 'message',
       from: from,
       to: to,
       id: id,
       type: type,
-      attributes: <String, String>{
+      attributes: <String, String>{...attributes!, 'xmlns': stanzaXmlns},
-        ...attributes!,
-        'xmlns': stanzaXmlns
-      },
       children: children,
     );
   }
@@ -92,8 +116,8 @@ class Stanza extends XMLNode {
       children: node.children,
       // TODO(Unknown): Remove to, from, id, and type
       // TODO(Unknown): Not sure if this is the correct way to approach this
-      attributes: node.attributes
+      attributes:
-        .map<String, String>((String key, dynamic value) {
+          node.attributes.map<String, String>((String key, dynamic value) {
         return MapEntry(key, value.toString());
       }),
     );
@@ -104,7 +128,13 @@ class Stanza extends XMLNode {
   String? type;
   String? id;
 
-  Stanza copyWith({ String? id, String? from, String? to, String? type, List<XMLNode>? children }) {
+  Stanza copyWith({
+    String? id,
+    String? from,
+    String? to,
+    String? type,
+    List<XMLNode>? children,
+  }) {
     return Stanza(
       tag: tag,
       to: to ?? this.to,
@@ -114,40 +144,29 @@ class Stanza extends XMLNode {
       children: children ?? this.children,
     );
   }
-  
-  Stanza reply({ List<XMLNode> children = const [] }) {
-    return copyWith(
-      from: attributes['to'] as String?,
-      to: attributes['from'] as String?,
-      type: tag == 'iq' ? 'result' : attributes['type'] as String?,
-      children: children,
-    );
 }
 
-  Stanza errorReply(String type, String condition, { String? text }) {
+/// Build an <error /> element with a child <[condition] type="[type]" />. If [text]
-   return copyWith(
+/// is not null, then the condition element will contain a <text /> element with [text]
-      from: attributes['to'] as String?,
+/// as the body.
-      to: attributes['from'] as String?,
+XMLNode buildErrorElement(String type, String condition, {String? text}) {
-      type: 'error',
+  return XMLNode(
-      children: [
-        XMLNode(
     tag: 'error',
     attributes: <String, dynamic>{'type': type},
     children: [
       XMLNode.xmlns(
         tag: condition,
         xmlns: fullStanzaXmlns,
-              children: text != null ?[
+        children: text != null
+            ? [
                 XMLNode.xmlns(
                   tag: 'text',
                   xmlns: fullStanzaXmlns,
                   text: text,
                 )
-              ] : [],
+              ]
-            )
+            : [],
-          ],
+      ),
-        )
     ],
   );
 }
-}

packages/moxxmpp/lib/src/stringxml.dart

@@ -1,7 +1,6 @@
 import 'package:xml/xml.dart';
 
 class XMLNode {
-
   XMLNode({
     required this.tag,
     this.attributes = const <String, dynamic>{},
@@ -17,7 +16,9 @@ class XMLNode {
     this.children = const [],
     this.closeTag = true,
     this.text,
-  }) : attributes = <String, String>{ 'xmlns': xmlns, ...attributes }, isDeclaration = false;
+  })  : attributes = <String, String>{'xmlns': xmlns, ...attributes},
+        isDeclaration = false;
+
   /// Because this API is better ;)
   /// Don't use in production. Just for testing
   factory XMLNode.fromXmlElement(XmlElement element) {
@@ -37,10 +38,12 @@ class XMLNode {
       return XMLNode(
         tag: element.name.qualified,
         attributes: attributes,
-        children: element.childElements.toList().map(XMLNode.fromXmlElement).toList(),
+        children:
+            element.childElements.toList().map(XMLNode.fromXmlElement).toList(),
       );
     }
   }
+
   /// Just for testing purposes
   factory XMLNode.fromString(String str) {
     return XMLNode.fromXmlElement(
@@ -63,7 +66,10 @@ class XMLNode {
   String renderAttributes() {
     return attributes.keys.map((String key) {
       final dynamic value = attributes[key];
-        assert(value is String || value is int, 'XML values must either be string or int');
+      assert(
+        value is String || value is int,
+        'XML values must either be string or int',
+      );
       if (value is String) {
         return "$key='$value'";
       } else {
@@ -124,11 +130,18 @@ class XMLNode {
   /// Returns all children whose tag is equal to [tag].
   List<XMLNode> findTags(String tag, {String? xmlns}) {
     return children.where((element) {
-      final xmlnsMatches = xmlns != null ? element.attributes['xmlns'] == xmlns : true;
+      final xmlnsMatches =
+          xmlns != null ? element.attributes['xmlns'] == xmlns : true;
       return element.tag == tag && xmlnsMatches;
     }).toList();
   }
 
+  List<XMLNode> findTagsByXmlns(String xmlns) {
+    return children
+        .where((element) => element.attributes['xmlns'] == xmlns)
+        .toList();
+  }
+
   /// Returns the inner text of the node. If none is set, returns the "".
   String innerText() {
     return text ?? '';

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

@@ -1,6 +1,9 @@
 class Result<T, V> {
-
+  const Result(this._data)
-  const Result(this._data) : assert(_data is T || _data is V, 'Invalid data type: Must be either $T or $V');
+      : 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;

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

@@ -0,0 +1,56 @@
+import 'dart:async';
+import 'dart:collection';
+import 'package:meta/meta.dart';
+import 'package:synchronized/synchronized.dart';
+
+/// A job to be submitted to an [AsyncQueue].
+typedef AsyncQueueJob = Future<void> 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].
+  final Lock _lock = Lock();
+
+  /// The actual job queue.
+  final Queue<AsyncQueueJob> _queue = Queue<AsyncQueueJob>();
+
+  /// Indicates whether we are currently executing a job.
+  bool _running = false;
+
+  @visibleForTesting
+  Queue<AsyncQueueJob> get queue => _queue;
+
+  @visibleForTesting
+  bool get isRunning => _running;
+
+  /// 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());
+      }
+    });
+  }
+
+  Future<void> clear() async {
+    await _lock.synchronized(_queue.clear);
+  }
+
+  Future<void> _popJob() async {
+    final job = _queue.removeFirst();
+    final future = job();
+    await future;
+
+    await _lock.synchronized(() {
+      if (_queue.isNotEmpty) {
+        unawaited(_popJob());
+      } else {
+        _running = false;
+      }
+    });
+  }
+}

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

@@ -0,0 +1,67 @@
+import 'dart:async';
+import 'package:meta/meta.dart';
+import 'package:synchronized/synchronized.dart';
+
+/// This class allows for multiple asynchronous code places to wait on the
+/// same computation of type [V], indentified by a key of type [K].
+class WaitForTracker<K, V> {
+  /// The mapping of key -> Completer for the pending tasks.
+  final Map<K, List<Completer<V>>> _tracker = {};
+
+  /// The lock for accessing _tracker.
+  final Lock _lock = Lock();
+
+  /// Wait for a task with key [key]. If there was no such task already
+  /// present, returns null. If one or more tasks were already present, returns
+  /// a future that will resolve to the result of the first task.
+  Future<Future<V>?> waitFor(K key) async {
+    final result = await _lock.synchronized(() {
+      if (_tracker.containsKey(key)) {
+        // The task already exists. Just append outselves
+        final completer = Completer<V>();
+        _tracker[key]!.add(completer);
+        return completer;
+      }
+
+      // The task does not exist yet
+      _tracker[key] = List<Completer<V>>.empty(growable: true);
+      return null;
+    });
+
+    return result?.future;
+  }
+
+  /// Resolve a task with key [key] to [value].
+  Future<void> resolve(K key, V value) async {
+    await _lock.synchronized(() {
+      if (!_tracker.containsKey(key)) return;
+
+      for (final completer in _tracker[key]!) {
+        completer.complete(value);
+      }
+
+      _tracker.remove(key);
+    });
+  }
+
+  Future<void> resolveAll(V value) async {
+    await _lock.synchronized(() {
+      for (final key in _tracker.keys) {
+        for (final completer in _tracker[key]!) {
+          completer.complete(value);
+        }
+      }
+    });
+  }
+
+  /// Remove all tasks from the tracker.
+  Future<void> clear() async {
+    await _lock.synchronized(_tracker.clear);
+  }
+
+  @visibleForTesting
+  bool hasTasksRunning() => _tracker.isNotEmpty;
+
+  @visibleForTesting
+  List<Completer<V>> getRunningTasks(K key) => _tracker[key]!;
+}

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

@@ -8,17 +8,20 @@ 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.attributes['xmlns'] == fileThumbnailsXmlns,
+    'Invalid element xmlns',
+  );
   assert(node.tag == 'file-thumbnail', 'Invalid element name');
 
   switch (node.attributes['type']!) {
-    case blurhashThumbnailType: {
+    case blurhashThumbnailType:
+      {
         final hash = node.firstTag('blurhash')!.innerText();
         return BlurhashThumbnail(hash);
       }

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

@@ -11,13 +11,7 @@ import 'package:moxxmpp/src/xeps/xep_0446.dart';
 const fileUploadNotificationXmlns = 'proto:urn:xmpp:fun:0';
 
 class FileUploadNotificationManager extends XmppManagerBase {
-  FileUploadNotificationManager() : super();
+  FileUploadNotificationManager() : super(fileUploadNotificationManager);
-
-  @override
-  String getId() => fileUploadNotificationManager;
-
-  @override
-  String getName() => 'FileUploadNotificationManager';
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -47,8 +41,12 @@ class FileUploadNotificationManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onFileUploadNotificationReceived(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onFileUploadNotificationReceived(
-    final funElement = message.firstTag('file-upload', xmlns: fileUploadNotificationXmlns)!;
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
+    final funElement =
+        message.firstTag('file-upload', xmlns: fileUploadNotificationXmlns)!;
     return state.copyWith(
       fun: FileMetadataData.fromXML(
         funElement.firstTag('file', xmlns: fileMetadataXmlns)!,
@@ -56,15 +54,23 @@ class FileUploadNotificationManager extends XmppManagerBase {
     );
   }
 
-  Future<StanzaHandlerData> _onFileUploadNotificationReplacementReceived(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onFileUploadNotificationReplacementReceived(
-    final element = message.firstTag('replaces', xmlns: fileUploadNotificationXmlns)!;
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
+    final element =
+        message.firstTag('replaces', xmlns: fileUploadNotificationXmlns)!;
     return state.copyWith(
       funReplacement: element.attributes['id']! as String,
     );
   }
 
-  Future<StanzaHandlerData> _onFileUploadNotificationCancellationReceived(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onFileUploadNotificationCancellationReceived(
-    final element = message.firstTag('cancels', xmlns: fileUploadNotificationXmlns)!;
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
+    final element =
+        message.firstTag('cancels', xmlns: fileUploadNotificationXmlns)!;
     return state.copyWith(
       funCancellation: element.attributes['id']! as String,
     );

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

@@ -3,7 +3,6 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
 class DataFormOption {
-
   const DataFormOption({required this.value, this.label});
   final String? label;
   final String value;
@@ -11,7 +10,9 @@ class DataFormOption {
   XMLNode toXml() {
     return XMLNode(
       tag: 'option',
-      attributes: label != null ? <String, dynamic>{ 'label': label } : <String, dynamic>{},
+      attributes: label != null
+          ? <String, dynamic>{'label': label}
+          : <String, dynamic>{},
       children: [
         XMLNode(
           tag: 'value',
@@ -23,7 +24,6 @@ class DataFormOption {
 }
 
 class DataFormField {
-
   const DataFormField({
     required this.options,
     required this.values,
@@ -45,9 +45,13 @@ class DataFormField {
     return XMLNode(
       tag: 'field',
       attributes: <String, dynamic>{
-        ...varAttr != null ? <String, dynamic>{ 'var': varAttr } : <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>{}
+        ...label != null
+            ? <String, dynamic>{'label': label}
+            : <String, dynamic>{}
       },
       children: [
         ...description != null ? [XMLNode(tag: 'desc', text: description)] : [],
@@ -60,7 +64,6 @@ class DataFormField {
 }
 
 class DataForm {
-
   const DataForm({
     required this.type,
     required this.instructions,
@@ -84,18 +87,18 @@ class DataForm {
     return XMLNode.xmlns(
       tag: 'x',
       xmlns: dataFormsXmlns,
-      attributes: {
+      attributes: {'type': type},
-        'type': type
-      },
       children: [
         ...instructions.map((i) => XMLNode(tag: 'instruction', text: i)),
         ...title != null ? [XMLNode(tag: 'title', text: title)] : [],
         ...fields.map((field) => field.toXml()),
         ...reported.map((report) => report.toXml()),
-        ...items.map((item) => XMLNode(
+        ...items.map(
+          (item) => XMLNode(
             tag: 'item',
             children: item.map((i) => i.toXml()).toList(),
-          ),),
+          ),
+        ),
       ],
     );
   }
@@ -131,10 +134,19 @@ DataForm parseDataForm(XMLNode x) {
 
   final type = x.attributes['type']! as String;
   final title = x.firstTag('title')?.innerText();
-  final instructions = x.findTags('instructions').map((i) => i.innerText()).toList();
+  final instructions =
+      x.findTags('instructions').map((i) => i.innerText()).toList();
   final fields = x.findTags('field').map(_parseDataFormField).toList();
-  final reported = x.firstTag('reported')?.findTags('field').map((i) => _parseDataFormField(i.firstTag('field')!)).toList() ?? [];
+  final reported = x
-  final items = x.findTags('item').map((i) => i.findTags('field').map(_parseDataFormField).toList()).toList();
+          .firstTag('reported')
+          ?.findTags('field')
+          .map((i) => _parseDataFormField(i.firstTag('field')!))
+          .toList() ??
+      [];
+  final items = x
+      .findTags('item')
+      .map((i) => i.findTags('field').map(_parseDataFormField).toList())
+      .toList();
 
   return DataForm(
     type: type,

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

@@ -0,0 +1,21 @@
+import 'package:meta/meta.dart';
+
+@internal
+@immutable
+class DiscoCacheKey {
+  const DiscoCacheKey(this.jid, this.node);
+
+  /// The JID we're requesting disco data from.
+  final String jid;
+
+  /// Optionally the node we are requesting from.
+  final String? node;
+
+  @override
+  bool operator ==(Object other) {
+    return other is DiscoCacheKey && jid == other.jid && node == other.node;
+  }
+
+  @override
+  int get hashCode => jid.hashCode ^ node.hashCode;
+}

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

@@ -5,21 +5,29 @@ import 'package:moxxmpp/src/stringxml.dart';
 // TODO(PapaTutuWawa): Move types into types.dart
 
 Stanza buildDiscoInfoQueryStanza(String entity, String? node) {
-  return Stanza.iq(to: entity, type: 'get', children: [
+  return Stanza.iq(
+    to: entity,
+    type: 'get',
+    children: [
       XMLNode.xmlns(
         tag: 'query',
         xmlns: discoInfoXmlns,
         attributes: node != null ? {'node': node} : {},
       )
-  ],);
+    ],
+  );
 }
 
 Stanza buildDiscoItemsQueryStanza(String entity, {String? node}) {
-  return Stanza.iq(to: entity, type: 'get', children: [
+  return Stanza.iq(
+    to: entity,
+    type: 'get',
+    children: [
       XMLNode.xmlns(
         tag: 'query',
         xmlns: discoItemsXmlns,
         attributes: node != null ? {'node': node} : {},
       )
-  ],);
+    ],
+  );
 }

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

@@ -1,10 +1,16 @@
+import 'package:meta/meta.dart';
 import 'package:moxxmpp/src/jid.dart';
+import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 import 'package:moxxmpp/src/xeps/xep_0004.dart';
 
 class Identity {
-
+  const Identity({
-  const Identity({ required this.category, required this.type, this.name, this.lang });
+    required this.category,
+    required this.type,
+    this.name,
+    this.lang,
+  });
   final String category;
   final String type;
   final String? name;
@@ -17,30 +23,109 @@ class Identity {
         'category': category,
         'type': type,
         'name': name,
-        ...lang == null ? <String, dynamic>{} : <String, dynamic>{ 'xml:lang': lang }
+        ...lang == null
+            ? <String, dynamic>{}
+            : <String, dynamic>{'xml:lang': lang}
       },
     );
   }
 }
 
+@immutable
 class DiscoInfo {
-
   const DiscoInfo(
     this.features,
     this.identities,
     this.extendedInfo,
+    this.node,
     this.jid,
   );
+
+  factory DiscoInfo.fromQuery(XMLNode query, JID jid) {
+    final features = List<String>.empty(growable: true);
+    final identities = List<Identity>.empty(growable: true);
+    final extendedInfo = List<DataForm>.empty(growable: true);
+
+    for (final element in query.children) {
+      if (element.tag == 'feature') {
+        features.add(element.attributes['var']! as String);
+      } else if (element.tag == 'identity') {
+        identities.add(
+          Identity(
+            category: element.attributes['category']! as String,
+            type: element.attributes['type']! as String,
+            name: element.attributes['name'] as String?,
+          ),
+        );
+      } else if (element.tag == 'x' &&
+          element.attributes['xmlns'] == dataFormsXmlns) {
+        extendedInfo.add(
+          parseDataForm(element),
+        );
+      }
+    }
+
+    return DiscoInfo(
+      features,
+      identities,
+      extendedInfo,
+      query.attributes['node'] as String?,
+      jid,
+    );
+  }
+
   final List<String> features;
   final List<Identity> identities;
   final List<DataForm> extendedInfo;
-  final JID jid;
+  final String? node;
+  final JID? jid;
+
+  XMLNode toXml() {
+    return XMLNode.xmlns(
+      tag: 'query',
+      xmlns: discoInfoXmlns,
+      attributes: node != null
+          ? <String, String>{
+              'node': node!,
+            }
+          : <String, String>{},
+      children: [
+        ...identities.map((identity) => identity.toXMLNode()),
+        ...features.map(
+          (feature) => XMLNode(
+            tag: 'feature',
+            attributes: {
+              'var': feature,
+            },
+          ),
+        ),
+        if (extendedInfo.isNotEmpty) ...extendedInfo.map((ei) => ei.toXml()),
+      ],
+    );
+  }
 }
 
+@immutable
 class DiscoItem {
-
   const DiscoItem({required this.jid, this.node, this.name});
   final String jid;
   final String? node;
   final String? name;
+
+  XMLNode toXml() {
+    final attributes = {
+      'jid': jid,
+    };
+    if (node != null) {
+      attributes['node'] = node!;
+    }
+    if (name != null) {
+      attributes['name'] = name!;
+    }
+
+    return XMLNode(
+      tag: 'node',
+      attributes: attributes,
+    );
+  }
 }

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

@@ -1,5 +1,6 @@
 import 'dart:async';
 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';
@@ -7,62 +8,74 @@ 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/types/result.dart';
-import 'package:moxxmpp/src/xeps/xep_0004.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';
 import 'package:moxxmpp/src/xeps/xep_0030/helpers.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/types.dart';
 import 'package:moxxmpp/src/xeps/xep_0115.dart';
 import 'package:synchronized/synchronized.dart';
 
-@immutable
+/// Callback that is called when a disco#info requests is received on a given node.
-class DiscoCacheKey {
+typedef DiscoInfoRequestCallback = Future<DiscoInfo> Function();
 
-  const DiscoCacheKey(this.jid, this.node);
+/// Callback that is called when a disco#items requests is received on a given node.
-  final String jid;
+typedef DiscoItemsRequestCallback = Future<List<DiscoItem>> Function();
-  final String? node;
-
-  @override
-  bool operator ==(Object other) {
-    return other is DiscoCacheKey && jid == other.jid && node == other.node;
-  }
-  
-  @override
-  int get hashCode => jid.hashCode ^ node.hashCode;
-}
 
+/// This manager implements XEP-0030 by providing a way of performing disco#info and
+/// disco#items requests and answering those requests.
+/// A caching mechanism is also provided.
 class DiscoManager extends XmppManagerBase {
+  /// [identities] is a list of disco identities that should be added by default
+  /// to a disco#info response.
+  DiscoManager(List<Identity> identities)
+      : _identities = List<Identity>.from(identities),
+        super(discoManager);
 
-  DiscoManager()
-    : _features = List.empty(growable: true),
-      _capHashCache = {},
-      _capHashInfoCache = {},
-      _discoInfoCache = {},
-      _runningInfoQueries = {},
-      _cacheLock = Lock(),
-      super();
   /// Our features
-  final List<String> _features;
+  final List<String> _features = List.empty(growable: true);
 
-  // Map full JID to Capability hashes
+  /// Disco identities that we advertise
-  final Map<String, CapabilityHashInfo> _capHashCache;
+  final List<Identity> _identities;
-  // Map capability hash to the disco info
+
-  final Map<String, DiscoInfo> _capHashInfoCache;
+  /// Map full JID to Capability hashes
-  // Map full JID to Disco Info
+  final Map<String, CapabilityHashInfo> _capHashCache = {};
-  final Map<DiscoCacheKey, DiscoInfo> _discoInfoCache;
+
-  // Mapping the full JID to a list of running requests
+  /// Map capability hash to the disco info
-  final Map<DiscoCacheKey, List<Completer<Result<DiscoError, DiscoInfo>>>> _runningInfoQueries;
+  final Map<String, DiscoInfo> _capHashInfoCache = {};
-  // Cache lock
+
-  final Lock _cacheLock;
+  /// 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>>
+      _discoInfoTracker = WaitForTracker();
+
+  /// The tracker for tracking disco#info queries that are in flight.
+  final WaitForTracker<DiscoCacheKey, Result<DiscoError, List<DiscoItem>>>
+      _discoItemsTracker = WaitForTracker();
+
+  /// Cache lock
+  final Lock _cacheLock = Lock();
+
+  /// disco#info callbacks: node -> Callback
+  final Map<String, DiscoInfoRequestCallback> _discoInfoCallbacks = {};
+
+  /// disco#items callbacks: node -> Callback
+  final Map<String, DiscoItemsRequestCallback> _discoItemsCallbacks = {};
+
+  /// The list of identities that are registered.
+  List<Identity> get identities => _identities;
+
+  /// The list of disco features that are registered.
+  List<String> get features => _features;
 
   @visibleForTesting
-  bool hasInfoQueriesRunning() => _runningInfoQueries.isNotEmpty;
+  WaitForTracker<DiscoCacheKey, Result<DiscoError, DiscoInfo>>
-
+      get infoTracker => _discoInfoTracker;
-  @visibleForTesting
-  List<Completer<Result<DiscoError, DiscoInfo>>> getRunningInfoQueries(DiscoCacheKey key) => _runningInfoQueries[key]!;
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -80,12 +93,6 @@ class DiscoManager extends XmppManagerBase {
         ),
       ];
 
-  @override
-  String getId() => discoManager;
-
-  @override
-  String getName() => 'DiscoManager';
-
   @override
   List<String> getDiscoFeatures() => [discoInfoXmlns, discoItemsXmlns];
 
@@ -96,7 +103,21 @@ class DiscoManager extends XmppManagerBase {
   Future<void> onXmppEvent(XmppEvent event) async {
     if (event is PresenceReceivedEvent) {
       await _onPresence(event.jid, event.presence);
-    } else if (event is StreamResumeFailedEvent) {
+    } 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.resumed) return;
+
+      // Cancel all waiting requests
+      await _discoInfoTracker.resolveAll(
+        Result<DiscoError, DiscoInfo>(UnknownDiscoError()),
+      );
+      await _discoItemsTracker.resolveAll(
+        Result<DiscoError, List<DiscoItem>>(UnknownDiscoError()),
+      );
+
       await _cacheLock.synchronized(() async {
         // Clear the cache
         _discoInfoCache.clear();
@@ -104,9 +125,19 @@ class DiscoManager extends XmppManagerBase {
     }
   }
 
+  /// Register a callback [callback] for a disco#info query on [node].
+  void registerInfoCallback(String node, DiscoInfoRequestCallback callback) {
+    _discoInfoCallbacks[node] = callback;
+  }
+
+  /// Register a callback [callback] for a disco#items query on [node].
+  void registerItemsCallback(String node, DiscoItemsRequestCallback callback) {
+    _discoItemsCallbacks[node] = callback;
+  }
+
   /// 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 addDiscoFeatures(List<String> features) {
+  void addFeatures(List<String> features) {
     for (final feat in features) {
       if (!_features.contains(feat)) {
         _features.add(feat);
@@ -114,6 +145,16 @@ class DiscoManager extends XmppManagerBase {
     }
   }
 
+  /// Adds a list of identities to the possible disco info response.
+  /// This function only adds features that are not already present in the disco features.
+  void addIdentities(List<Identity> identities) {
+    for (final identity in identities) {
+      if (!_identities.contains(identity)) {
+        _identities.add(identity);
+      }
+    }
+  }
+
   Future<void> _onPresence(JID from, Stanza presence) async {
     final c = presence.firstTag('c', xmlns: capsXmlns);
     if (c == null) return;
@@ -134,8 +175,11 @@ class DiscoManager extends XmppManagerBase {
     if (cached) return;
 
     // Request the cap hash
-    logger.finest("Received capability hash we don't know about. Requesting it...");
+    logger.finest(
-    final result = await discoInfoQuery(from.toString(), node: '${info.node}#${info.ver}');
+      "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 {
@@ -144,178 +188,130 @@ class DiscoManager extends XmppManagerBase {
     });
   }
 
-  /// Returns the list of disco features registered.
+  /// Returns the [DiscoInfo] object that would be used as the response to a disco#info
-  List<String> getRegisteredDiscoFeatures() => _features;
+  /// query against our bare JID with no node. The results node attribute is set
+  /// to [node].
+  DiscoInfo getDiscoInfo(String? node) {
+    return DiscoInfo(
+      _features,
+      _identities,
+      const [],
+      node,
+      null,
+    );
+  }
 
-  /// May be overriden. Specifies the identities which will be returned in a disco info response.
+  Future<StanzaHandlerData> _onDiscoInfoRequest(
-  List<Identity> getIdentities() => const [ Identity(category: 'client', type: 'pc', name: 'moxxmpp', lang: 'en') ];
+    Stanza stanza,
-  
+    StanzaHandlerData state,
-  Future<StanzaHandlerData> _onDiscoInfoRequest(Stanza stanza, StanzaHandlerData state) async {
+  ) async {
     if (stanza.type != 'get') return state;
 
-    final presence = getAttributes().getManagerById(presenceManager)! as PresenceManager;
+    final query = stanza.firstTag('query', xmlns: discoInfoXmlns)!;
-    final query = stanza.firstTag('query')!;
     final node = query.attributes['node'] as String?;
-    final capHash = await presence.getCapabilityHash();
-    final isCapabilityNode = node == '${presence.capabilityHashNode}#$capHash';
 
-    if (!isCapabilityNode && node != null) {
+    if (_discoInfoCallbacks.containsKey(node)) {
-      await getAttributes().sendStanza(Stanza.iq(
+      // We can now assume that node != null
-            to: stanza.from,
+      final result = await _discoInfoCallbacks[node]!();
-            from: stanza.to,
+      await reply(
-            id: stanza.id,
+        state,
-            type: 'error',
+        'result',
-            children: [
+        [
-              XMLNode.xmlns(
+          result.toXml(),
-                tag: 'query',
-                // TODO(PapaTutuWawa): Why are we copying the xmlns?
-                xmlns: query.attributes['xmlns']! as String,
-                attributes: <String, String>{
-                  'node': node
-                },
-              ),
-              XMLNode(
-                tag: 'error',
-                attributes: <String, String>{
-                  'type': 'cancel'
-                },
-                children: [
-                  XMLNode.xmlns(
-                    tag: 'not-allowed',
-                    xmlns: fullStanzaXmlns,
-                  )
         ],
-              )
-            ],
-          )
-      ,);
-
-      return state.copyWith(done: true);
-    }
-
-    await getAttributes().sendStanza(stanza.reply(
-        children: [
-          XMLNode.xmlns(
-            tag: 'query',
-            xmlns: discoInfoXmlns,
-            attributes: {
-              ...!isCapabilityNode ? {} : {
-                'node': '${presence.capabilityHashNode}#$capHash'
-              }
-            },
-            children: [
-              ...getIdentities().map((identity) => identity.toXMLNode()),
-              ..._features.map((feat) {
-                return XMLNode(
-                  tag: 'feature',
-                  attributes: <String, dynamic>{ 'var': feat },
       );
-              }),
-            ],
-          ),
-        ],
-    ),);
 
       return state.copyWith(done: true);
     }
 
-  Future<StanzaHandlerData> _onDiscoItemsRequest(Stanza stanza, StanzaHandlerData state) async {
+    await reply(
+      state,
+      'result',
+      [
+        getDiscoInfo(node).toXml(),
+      ],
+    );
+
+    return state.copyWith(done: true);
+  }
+
+  Future<StanzaHandlerData> _onDiscoItemsRequest(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
     if (stanza.type != 'get') return state;
 
-    final query = stanza.firstTag('query')!;
+    final query = stanza.firstTag('query', xmlns: discoItemsXmlns)!;
-    if (query.attributes['node'] != null) {
+    final node = query.attributes['node'] as String?;
-      // TODO(Unknown): Handle the node we specified for XEP-0115
+    if (_discoItemsCallbacks.containsKey(node)) {
-      await getAttributes().sendStanza(
+      final result = await _discoItemsCallbacks[node]!();
-        Stanza.iq(
+      await reply(
-          to: stanza.from,
+        state,
-          from: stanza.to,
+        'result',
-          id: stanza.id,
+        [
-          type: 'error',
-          children: [
-            XMLNode.xmlns(
-              tag: 'query',
-              // TODO(PapaTutuWawa): Why copy the xmlns?
-              xmlns: query.attributes['xmlns']! as String,
-              attributes: <String, String>{
-                'node': query.attributes['node']! as String,
-              },
-            ),
-            XMLNode(
-              tag: 'error',
-              attributes: <String, dynamic>{
-                'type': 'cancel'
-              },
-              children: [
-                XMLNode.xmlns(
-                  tag: 'not-allowed',
-                  xmlns: fullStanzaXmlns,
-                ),
-              ],
-            ),
-          ],
-        ),
-      );
-      return state.copyWith(done: true);
-    }
-
-    await getAttributes().sendStanza(
-      stanza.reply(
-        children: [
           XMLNode.xmlns(
             tag: 'query',
             xmlns: discoItemsXmlns,
+            attributes: <String, String>{
+              'node': node!,
+            },
+            children: result.map((item) => item.toXml()).toList(),
           ),
         ],
-      ),
       );
+
       return state.copyWith(done: true);
     }
 
-  Future<void> _exitDiscoInfoCriticalSection(DiscoCacheKey key, Result<DiscoError, DiscoInfo> result) async {
+    return state;
-    return _cacheLock.synchronized(() async {
-      // Complete all futures
-      for (final completer in _runningInfoQueries[key]!) {
-        completer.complete(result);
   }
 
+  Future<void> _exitDiscoInfoCriticalSection(
+    DiscoCacheKey key,
+    Result<DiscoError, DiscoInfo> result,
+  ) async {
+    await _cacheLock.synchronized(() async {
       // Add to cache if it is a result
       if (result.isType<DiscoInfo>()) {
         _discoInfoCache[key] = result.get<DiscoInfo>();
       }
-      
-      // Remove from the request cache
-      _runningInfoQueries.remove(key);
     });
+
+    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, { String? node}) async {
+  Future<Result<DiscoError, DiscoInfo>> discoInfoQuery(
+    String entity, {
+    String? node,
+    bool shouldEncrypt = true,
+  }) async {
     final cacheKey = DiscoCacheKey(entity, node);
     DiscoInfo? info;
-    Completer<Result<DiscoError, DiscoInfo>>? completer;
+    final ffuture = await _cacheLock
-    await _cacheLock.synchronized(() async {
+        .synchronized<Future<Future<Result<DiscoError, DiscoInfo>>?>?>(
+            () async {
       // Check if we already know what the JID supports
       if (_discoInfoCache.containsKey(cacheKey)) {
         info = _discoInfoCache[cacheKey];
+        return null;
       } else {
-        // Is a request running?
+        return _discoInfoTracker.waitFor(cacheKey);
-        if (_runningInfoQueries.containsKey(cacheKey)) {
-          completer = Completer();
-          _runningInfoQueries[cacheKey]!.add(completer!);
-        } else {
-          _runningInfoQueries[cacheKey] = List.from(<Completer<DiscoInfo?>>[]);
-        }
       }
     });
 
     if (info != null) {
       return Result<DiscoError, DiscoInfo>(info);
-    } else if (completer != null) {
+    } else {
-      return completer!.future;
+      final future = await ffuture;
+      if (future != null) {
+        return future;
+      }
     }
 
     final stanza = await getAttributes().sendStanza(
       buildDiscoInfoQueryStanza(entity, node),
+      encrypted: !shouldEncrypt,
     );
     final query = stanza.firstTag('query');
     if (query == null) {
@@ -324,34 +320,17 @@ class DiscoManager extends XmppManagerBase {
       return result;
     }
 
-    final error = stanza.firstTag('error');
+    if (stanza.attributes['type'] == 'error') {
-    if (error != null && stanza.attributes['type'] == 'error') {
+      //final error = stanza.firstTag('error');
       final result = Result<DiscoError, DiscoInfo>(ErrorResponseDiscoError());
       await _exitDiscoInfoCriticalSection(cacheKey, result);
       return result;
     }
 
-    final features = List<String>.empty(growable: true);
-    final identities = List<Identity>.empty(growable: true);
-
-    for (final element in query.children) {
-      if (element.tag == 'feature') {
-        features.add(element.attributes['var']! as String);
-      } else if (element.tag == 'identity') {
-        identities.add(Identity(
-          category: element.attributes['category']! as String,
-          type: element.attributes['type']! as String,
-          name: element.attributes['name'] as String?,
-        ),);
-      }
-    }
-
     final result = Result<DiscoError, DiscoInfo>(
-      DiscoInfo(
+      DiscoInfo.fromQuery(
-        features,
+        query,
-        identities,
+        JID.fromString(entity),
-        query.findTags('x', xmlns: dataFormsXmlns).map(parseDataForm).toList(),
-        JID.fromString(stanza.attributes['from']! as String),
       ),
     );
     await _exitDiscoInfoCriticalSection(cacheKey, result);
@@ -359,30 +338,61 @@ class DiscoManager extends XmppManagerBase {
   }
 
   /// Sends a disco items query to the (full) jid [entity], optionally with node=[node].
-  Future<Result<DiscoError, List<DiscoItem>>> discoItemsQuery(String entity, { String? node }) async {
+  Future<Result<DiscoError, List<DiscoItem>>> discoItemsQuery(
-    final stanza = await getAttributes()
+    String entity, {
-      .sendStanza(buildDiscoItemsQueryStanza(entity, node: node)) as Stanza;
+    String? node,
-
+    bool shouldEncrypt = true,
-    final query = stanza.firstTag('query');
+  }) async {
-    if (query == null) return Result(InvalidResponseDiscoError());
+    final key = DiscoCacheKey(entity, node);
-
+    final future = await _discoItemsTracker.waitFor(key);
-    final error = stanza.firstTag('error');
+    if (future != null) {
-    if (error != null && stanza.type == 'error') {
+      return future;
-      //print("Disco Items error: " + error.toXml());
-      return Result(ErrorResponseDiscoError());
     }
 
-    final items = query.findTags('item').map((node) => DiscoItem(
+    final stanza = await getAttributes().sendStanza(
+      buildDiscoItemsQueryStanza(entity, node: node),
+      encrypted: !shouldEncrypt,
+    ) as Stanza;
+
+    final query = stanza.firstTag('query');
+    if (query == null) {
+      final result =
+          Result<DiscoError, List<DiscoItem>>(InvalidResponseDiscoError());
+      await _discoItemsTracker.resolve(key, result);
+      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,
             node: node.attributes['node'] as String?,
             name: node.attributes['name'] as String?,
-    ),).toList();
+          ),
+        )
+        .toList();
 
-    return Result(items);
+    final result = Result<DiscoError, List<DiscoItem>>(items);
+    await _discoItemsTracker.resolve(key, result);
+    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 {
+  Future<Result<DiscoError, DiscoInfo>> discoInfoCapHashQuery(
+    String jid,
+    String node,
+    String ver,
+  ) async {
     return discoInfoQuery(jid, node: '$node#$ver');
   }
 

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

@@ -7,15 +7,20 @@ 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 {}
+
+class UnknownVCardError extends VCardError {}
+
+class InvalidVCardError extends VCardError {}
 
 class VCardPhoto {
-
   const VCardPhoto({this.binval});
   final String? binval;
 }
 
 class VCard {
-
   const VCard({this.nickname, this.url, this.photo});
   final String? nickname;
   final String? url;
@@ -23,15 +28,8 @@ class VCard {
 }
 
 class VCardManager extends XmppManagerBase {
-
+  VCardManager() : super(vcardManager);
-  VCardManager() : _lastHash = {}, super();
+  final Map<String, String> _lastHash = {};
-  final Map<String, String> _lastHash;
-  
-  @override
-  String getId() => vcardManager;
-
-  @override
-  String getName() => 'vCardManager';
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -51,7 +49,10 @@ class VCardManager extends XmppManagerBase {
     _lastHash[jid] = hash;
   }
 
-  Future<StanzaHandlerData> _onPresence(Stanza presence, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onPresence(
+    Stanza presence,
+    StanzaHandlerData state,
+  ) async {
     final x = presence.firstTag('x', xmlns: vCardTempUpdate)!;
     final hash = x.firstTag('photo')!.innerText();
 
@@ -59,12 +60,18 @@ class VCardManager extends XmppManagerBase {
     final lastHash = _lastHash[from];
     if (lastHash != hash) {
       _lastHash[from] = hash;
-      final vcard = await requestVCard(from);
+      final vcardResult = await requestVCard(from);
 
-      if (vcard != null) {
+      if (vcardResult.isType<VCard>()) {
-        final binval = vcard.photo?.binval;
+        final binval = vcardResult.get<VCard>().photo?.binval;
         if (binval != null) {
-          getAttributes().sendEvent(AvatarUpdatedEvent(jid: from, base64: binval, hash: hash));
+          getAttributes().sendEvent(
+            AvatarUpdatedEvent(
+              jid: from,
+              base64: binval,
+              hash: hash,
+            ),
+          );
         } else {
           logger.warning('No avatar data found');
         }
@@ -95,7 +102,7 @@ class VCardManager extends XmppManagerBase {
     );
   }
 
-  Future<VCard?> requestVCard(String jid) async {
+  Future<Result<VCardError, VCard>> requestVCard(String jid) async {
     final result = await getAttributes().sendStanza(
       Stanza.iq(
         to: jid,
@@ -107,12 +114,17 @@ class VCardManager extends XmppManagerBase {
           )
         ],
       ),
+      encrypted: true,
     );
 
-    if (result.attributes['type'] != 'result') return null;
+    if (result.attributes['type'] != 'result') {
+      return Result(UnknownVCardError());
+    }
     final vcard = result.firstTag('vCard', xmlns: vCardTempXmlns);
-    if (vcard == null) return null;
+    if (vcard == null) {
+      return Result(UnknownVCardError());
+    }
 
-    return _parseVCard(vcard);
+    return Result(_parseVCard(vcard));
   }
 }

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

@@ -16,7 +16,6 @@ import 'package:moxxmpp/src/xeps/xep_0060/errors.dart';
 import 'package:moxxmpp/src/xeps/xep_0060/helpers.dart';
 
 class PubSubPublishOptions {
-
   const PubSubPublishOptions({
     this.accessModel,
     this.maxItems,
@@ -38,30 +37,37 @@ class PubSubPublishOptions {
           varAttr: 'FORM_TYPE',
           type: 'hidden',
         ),
-        ...accessModel != null ? [
+        ...accessModel != null
+            ? [
                 DataFormField(
                   options: [],
                   isRequired: false,
                   values: [accessModel!],
                   varAttr: 'pubsub#access_model',
                 )
-          ] : [],
+              ]
-        ...maxItems != null ? [
+            : [],
+        ...maxItems != null
+            ? [
                 DataFormField(
                   options: [],
                   isRequired: false,
                   values: [maxItems!],
                   varAttr: 'pubsub#max_items',
                 ),
-        ] : [],
+              ]
+            : [],
       ],
     ).toXml();
   }
 }
 
 class PubSubItem {
-
+  const PubSubItem({
-  const PubSubItem({ required this.id, required this.node, required this.payload });
+    required this.id,
+    required this.node,
+    required this.payload,
+  });
   final String id;
   final String node;
   final XMLNode payload;
@@ -71,11 +77,7 @@ class PubSubItem {
 }
 
 class PubSubManager extends XmppManagerBase {
-  @override
+  PubSubManager() : super(pubsubManager);
-  String getId() => pubsubManager;
-
-  @override
-  String getName() => 'PubsubManager';
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -90,20 +92,25 @@ class PubSubManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onPubsubMessage(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onPubsubMessage(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     logger.finest('Received PubSub event');
     final event = message.firstTag('event', xmlns: pubsubEventXmlns)!;
     final items = event.firstTag('items')!;
     final item = items.firstTag('item')!;
 
-    getAttributes().sendEvent(PubSubNotificationEvent(
+    getAttributes().sendEvent(
+      PubSubNotificationEvent(
         item: PubSubItem(
           id: item.attributes['id']! as String,
           node: items.attributes['node']! as String,
           payload: item.children[0],
         ),
         from: message.attributes['from']! as String,
-    ),);
+      ),
+    );
 
     return state.copyWith(done: true);
   }
@@ -113,7 +120,9 @@ class PubSubManager extends XmppManagerBase {
     final response = await dm.discoItemsQuery(jid, node: node);
     var count = 0;
     if (response.isType<DiscoError>()) {
-      logger.warning('_getNodeItemCount: disco#items query failed. Assuming no items.');
+      logger.warning(
+        '_getNodeItemCount: disco#items query failed. Assuming no items.',
+      );
     } else {
       count = response.get<List<DiscoItem>>().length;
     }
@@ -121,19 +130,27 @@ class PubSubManager extends XmppManagerBase {
     return count;
   }
 
-  Future<PubSubPublishOptions> _preprocessPublishOptions(String jid, String node, PubSubPublishOptions options) async {
+  Future<PubSubPublishOptions> _preprocessPublishOptions(
+    String jid,
+    String node,
+    PubSubPublishOptions options,
+  ) async {
     if (options.maxItems != null) {
       final dm = getAttributes().getManagerById<DiscoManager>(discoManager)!;
       final result = await dm.discoInfoQuery(jid);
       if (result.isType<DiscoError>()) {
         if (options.maxItems == 'max') {
-          logger.severe('disco#info query failed and options.maxItems is set to "max".');
+          logger.severe(
+            'disco#info query failed and options.maxItems is set to "max".',
+          );
           return options;
         }
       }
 
-      final nodeMultiItemsSupported = result.isType<DiscoInfo>() && result.get<DiscoInfo>().features.contains(pubsubNodeConfigMultiItems);
+      final nodeMultiItemsSupported = result.isType<DiscoInfo>() &&
-      final nodeMaxSupported = result.isType<DiscoInfo>() && result.get<DiscoInfo>().features.contains(pubsubNodeConfigMax);
+          result.get<DiscoInfo>().features.contains(pubsubNodeConfigMultiItems);
+      final nodeMaxSupported = result.isType<DiscoInfo>() &&
+          result.get<DiscoInfo>().features.contains(pubsubNodeConfigMax);
       if (options.maxItems != null && !nodeMultiItemsSupported) {
         // TODO(PapaTutuWawa): Here, we need to admit defeat
         logger.finest('PubSub host does not support multi-items!');
@@ -142,7 +159,9 @@ class PubSubManager extends XmppManagerBase {
           accessModel: options.accessModel,
         );
       } else if (options.maxItems == 'max' && !nodeMaxSupported) {
-        logger.finest('PubSub host does not support node-config-max. Working around it');
+        logger.finest(
+          'PubSub host does not support node-config-max. Working around it',
+        );
         final count = await _getNodeItemCount(jid, node) + 1;
 
         return PubSubPublishOptions(
@@ -179,13 +198,19 @@ class PubSubManager extends XmppManagerBase {
       ),
     );
 
-    if (result.attributes['type'] != 'result') return Result(UnknownPubSubError());
+    if (result.attributes['type'] != 'result') {
+      return Result(UnknownPubSubError());
+    }
 
     final pubsub = result.firstTag('pubsub', xmlns: pubsubXmlns);
-    if (pubsub == null) return Result(UnknownPubSubError());
+    if (pubsub == null) {
+      return Result(UnknownPubSubError());
+    }
 
     final subscription = pubsub.firstTag('subscription');
-    if (subscription == null) return Result(UnknownPubSubError());
+    if (subscription == null) {
+      return Result(UnknownPubSubError());
+    }
 
     return Result(subscription.attributes['subscription'] == 'subscribed');
   }
@@ -214,13 +239,19 @@ class PubSubManager extends XmppManagerBase {
       ),
     );
 
-    if (result.attributes['type'] != 'result') return Result(UnknownPubSubError());
+    if (result.attributes['type'] != 'result') {
+      return Result(UnknownPubSubError());
+    }
 
     final pubsub = result.firstTag('pubsub', xmlns: pubsubXmlns);
-    if (pubsub == null) return Result(UnknownPubSubError());
+    if (pubsub == null) {
+      return Result(UnknownPubSubError());
+    }
 
     final subscription = pubsub.firstTag('subscription');
-    if (subscription == null) return Result(UnknownPubSubError());
+    if (subscription == null) {
+      return Result(UnknownPubSubError());
+    }
 
     return Result(subscription.attributes['subscription'] == 'none');
   }
@@ -233,8 +264,7 @@ class PubSubManager extends XmppManagerBase {
     XMLNode payload, {
     String? id,
     PubSubPublishOptions? options,
-    }
+  }) async {
-  ) async {
     return _publish(
       jid,
       node,
@@ -252,8 +282,7 @@ class PubSubManager extends XmppManagerBase {
     PubSubPublishOptions? options,
     // Should, if publishing fails, try to reconfigure and publish again?
     bool tryConfigureAndPublish = true,
-    }
+  }) async {
-  ) async {
     PubSubPublishOptions? pubOptions;
     if (options != null) {
       pubOptions = await _preprocessPublishOptions(jid, node, options);
@@ -274,17 +303,21 @@ class PubSubManager extends XmppManagerBase {
                 children: [
                   XMLNode(
                     tag: 'item',
-                    attributes: id != null ? <String, String>{ 'id': id } : <String, String>{},
+                    attributes: id != null
+                        ? <String, String>{'id': id}
+                        : <String, String>{},
                     children: [payload],
                   )
                 ],
               ),
-              ...options != null ? [
+              ...options != null
+                  ? [
                       XMLNode(
                         tag: 'publish-options',
                         children: [options.toXml()],
                       ),
-              ] : [],
+                    ]
+                  : [],
             ],
           )
         ],
@@ -308,10 +341,16 @@ class PubSubManager extends XmppManagerBase {
           options: options,
           tryConfigureAndPublish: false,
         );
-        if (publishResult.isType<PubSubError>()) return publishResult;
+        if (publishResult.isType<PubSubError>()) {
-      } else if (error is EjabberdMaxItemsError && tryConfigureAndPublish && options != null) {
+          return publishResult;
+        }
+      } else if (error is EjabberdMaxItemsError &&
+          tryConfigureAndPublish &&
+          options != null) {
         // TODO(Unknown): Remove once ejabberd fixes the bug. See errors.dart for more info.
-        logger.warning('Publish failed due to the server rejecting the usage of "max" for "max_items" in publish options. Configuring...');
+        logger.warning(
+          'Publish failed due to the server rejecting the usage of "max" for "max_items" in publish options. Configuring...',
+        );
         final count = await _getNodeItemCount(jid, node) + 1;
         return publish(
           jid,
@@ -329,20 +368,31 @@ class PubSubManager extends XmppManagerBase {
     }
 
     final pubsubElement = result.firstTag('pubsub', xmlns: pubsubXmlns);
-    if (pubsubElement == null) return Result(MalformedResponseError());
+    if (pubsubElement == null) {
+      return Result(MalformedResponseError());
+    }
 
     final publishElement = pubsubElement.firstTag('publish');
-    if (publishElement == null) return Result(MalformedResponseError());
+    if (publishElement == null) {
+      return Result(MalformedResponseError());
+    }
 
     final item = publishElement.firstTag('item');
-    if (item == null) return Result(MalformedResponseError());
+    if (item == null) {
+      return Result(MalformedResponseError());
+    }
 
-    if (id != null) return Result(item.attributes['id'] == id);
+    if (id != null) {
+      return Result(item.attributes['id'] == id);
+    }
 
     return const Result(true);
   }
 
-  Future<Result<PubSubError, List<PubSubItem>>> getItems(String jid, String node) async {
+  Future<Result<PubSubError, List<PubSubItem>>> getItems(
+    String jid,
+    String node,
+  ) async {
     final result = await getAttributes().sendStanza(
       Stanza.iq(
         type: 'get',
@@ -359,26 +409,31 @@ class PubSubManager extends XmppManagerBase {
       ),
     );
 
-    if (result.attributes['type'] != 'result') return Result(getPubSubError(result));
+    if (result.attributes['type'] != 'result') {
+      return Result(getPubSubError(result));
+    }
 
     final pubsub = result.firstTag('pubsub', xmlns: pubsubXmlns);
-    if (pubsub == null) return Result(getPubSubError(result));
+    if (pubsub == null) {
+      return Result(getPubSubError(result));
+    }
 
-    final items = pubsub
+    final items = pubsub.firstTag('items')!.children.map((item) {
-      .firstTag('items')!
-      .children.map((item) {
       return PubSubItem(
         id: item.attributes['id']! as String,
         payload: item.children[0],
         node: node,
       );
-      })
+    }).toList();
-      .toList();
 
     return Result(items);
   }
 
-  Future<Result<PubSubError, PubSubItem>> getItem(String jid, String node, String id) async {
+  Future<Result<PubSubError, PubSubItem>> getItem(
+    String jid,
+    String node,
+    String id,
+  ) async {
     final result = await getAttributes().sendStanza(
       Stanza.iq(
         type: 'get',
@@ -404,7 +459,9 @@ class PubSubManager extends XmppManagerBase {
       ),
     );
 
-    if (result.attributes['type'] != 'result') return Result(getPubSubError(result));
+    if (result.attributes['type'] != 'result') {
+      return Result(getPubSubError(result));
+    }
 
     final pubsub = result.firstTag('pubsub', xmlns: pubsubXmlns);
     if (pubsub == null) return Result(getPubSubError(result));
@@ -421,7 +478,11 @@ class PubSubManager extends XmppManagerBase {
     return Result(item);
   }
 
-  Future<Result<PubSubError, bool>> configure(String jid, String node, PubSubPublishOptions options) async {
+  Future<Result<PubSubError, bool>> configure(
+    String jid,
+    String node,
+    PubSubPublishOptions options,
+  ) async {
     final attrs = getAttributes();
 
     // Request the form
@@ -445,7 +506,9 @@ class PubSubManager extends XmppManagerBase {
         ],
       ),
     );
-    if (form.attributes['type'] != 'result') return Result(getPubSubError(form));
+    if (form.attributes['type'] != 'result') {
+      return Result(getPubSubError(form));
+    }
 
     final submit = await attrs.sendStanza(
       Stanza.iq(
@@ -470,7 +533,9 @@ class PubSubManager extends XmppManagerBase {
         ],
       ),
     );
-    if (submit.attributes['type'] != 'result') return Result(getPubSubError(form));
+    if (submit.attributes['type'] != 'result') {
+      return Result(getPubSubError(form));
+    }
 
     return const Result(true);
   }
@@ -505,7 +570,11 @@ class PubSubManager extends XmppManagerBase {
     return const Result(true);
   }
 
-  Future<Result<PubSubError, bool>> retract(JID host, String node, String itemId) async {
+  Future<Result<PubSubError, bool>> retract(
+    JID host,
+    String node,
+    String itemId,
+  ) async {
     final request = await getAttributes().sendStanza(
       Stanza.iq(
         type: 'set',

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

@@ -8,7 +8,6 @@ import 'package:moxxmpp/src/stringxml.dart';
 
 /// A data class representing the jabber:x:oob tag.
 class OOBData {
-
   const OOBData({this.url, this.desc});
   final String? url;
   final String? desc;
@@ -32,11 +31,7 @@ XMLNode constructOOBNode(OOBData data) {
 }
 
 class OOBManager extends XmppManagerBase {
-  @override
+  OOBManager() : super(oobManager);
-  String getName() => 'OOBName';
-
-  @override
-  String getId() => oobManager;
 
   @override
   List<String> getDiscoFeatures() => [oobDataXmlns];
@@ -56,7 +51,10 @@ class OOBManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onMessage(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessage(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     final x = message.firstTag('x', xmlns: oobDataXmlns)!;
     final url = x.firstTag('url');
     final desc = x.firstTag('desc');

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

@@ -3,21 +3,24 @@ 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';
 
-class UserAvatar {
+abstract class AvatarError {}
 
+class UnknownAvatarError extends AvatarError {}
+
+class UserAvatar {
   const UserAvatar({required this.base64, required this.hash});
   final String base64;
   final String hash;
 }
 
 class UserAvatarMetadata {
-
   const UserAvatarMetadata(
     this.id,
     this.length,
@@ -25,30 +28,41 @@ class UserAvatarMetadata {
     this.height,
     this.mime,
   );
+
   /// The amount of bytes in the file
   final int length;
+
   /// The identifier of the avatar
   final String id;
+
   /// Image proportions
   final int width;
   final int height;
+
   /// The MIME type of the avatar
   final String mime;
 }
 
 /// NOTE: This class requires a PubSubManager
 class UserAvatarManager extends XmppManagerBase {
-  @override
+  UserAvatarManager() : super(userAvatarManager);
-  String getId() => userAvatarManager;
 
-  @override
+  PubSubManager _getPubSubManager() =>
-  String getName() => 'UserAvatarManager';
+      getAttributes().getManagerById(pubsubManager)! as PubSubManager;
-
-  PubSubManager _getPubSubManager() => getAttributes().getManagerById(pubsubManager)! as PubSubManager;
 
   @override
   Future<void> onXmppEvent(XmppEvent event) async {
     if (event is PubSubNotificationEvent) {
+      if (event.item.node != userAvatarDataXmlns) return;
+
+      if (event.item.payload.tag != 'data' ||
+          event.item.payload.attributes['xmlns'] != userAvatarDataXmlns) {
+        logger.warning(
+          'Received avatar update from ${event.from} but the payload is invalid. Ignoring...',
+        );
+        return;
+      }
+
       getAttributes().sendEvent(
         AvatarUpdatedEvent(
           jid: event.from,
@@ -65,27 +79,31 @@ class UserAvatarManager extends XmppManagerBase {
 
   /// Requests the avatar from [jid]. Returns the avatar data if the request was
   /// successful. Null otherwise
-  // TODO(Unknown): Migrate to Resultsv2
+  Future<Result<AvatarError, UserAvatar>> getUserAvatar(String jid) async {
-  Future<UserAvatar?> getUserAvatar(String jid) async {
     final pubsub = _getPubSubManager();
     final resultsRaw = await pubsub.getItems(jid, userAvatarDataXmlns);
-    if (resultsRaw.isType<PubSubError>()) return null;
+    if (resultsRaw.isType<PubSubError>()) return Result(UnknownAvatarError());
 
     final results = resultsRaw.get<List<PubSubItem>>();
-    if (results.isEmpty) return null;
+    if (results.isEmpty) return Result(UnknownAvatarError());
 
     final item = results[0];
-    return UserAvatar(
+    return Result(
+      UserAvatar(
         base64: item.payload.innerText(),
         hash: item.id,
+      ),
     );
   }
 
   /// Publish the avatar data, [base64], on the pubsub node using [hash] as
   /// the item id. [hash] must be the SHA-1 hash of the image data, while
   /// [base64] must be the base64-encoded version of the image data.
-  // TODO(Unknown): Migrate to Resultsv2
+  Future<Result<AvatarError, bool>> publishUserAvatar(
-  Future<bool> publishUserAvatar(String base64, String hash, bool public) async {
+    String base64,
+    String hash,
+    bool public,
+  ) async {
     final pubsub = _getPubSubManager();
     final result = await pubsub.publish(
       getAttributes().getFullJID().toBare().toString(),
@@ -101,14 +119,18 @@ class UserAvatarManager extends XmppManagerBase {
       ),
     );
 
-    return !result.isType<PubSubError>();
+    if (result.isType<PubSubError>()) return Result(UnknownAvatarError());
+
+    return const Result(true);
   }
 
   /// Publish avatar metadata [metadata] to the User Avatar's metadata node. If [public]
   /// is true, then the node will be set to an 'open' access model. If [public] is false,
   /// then the node will be set to an 'roster' access model.
-  // TODO(Unknown): Migrate to Resultsv2
+  Future<Result<AvatarError, bool>> publishUserAvatarMetadata(
-  Future<bool> publishUserAvatarMetadata(UserAvatarMetadata metadata, bool public) async {
+    UserAvatarMetadata metadata,
+    bool public,
+  ) async {
     final pubsub = _getPubSubManager();
     final result = await pubsub.publish(
       getAttributes().getFullJID().toBare().toString(),
@@ -135,39 +157,41 @@ class UserAvatarManager extends XmppManagerBase {
       ),
     );
 
-    return result.isType<PubSubError>();
+    if (result.isType<PubSubError>()) return Result(UnknownAvatarError());
+    return const Result(true);
   }
 
   /// Subscribe the data and metadata node of [jid].
-  // TODO(Unknown): Migrate to Resultsv2
+  Future<Result<AvatarError, bool>> subscribe(String jid) async {
-  Future<bool> subscribe(String jid) async {
     await _getPubSubManager().subscribe(jid, userAvatarDataXmlns);
     await _getPubSubManager().subscribe(jid, userAvatarMetadataXmlns);
 
-    return true;
+    return const Result(true);
   }
 
   /// Unsubscribe the data and metadata node of [jid].
-  // TODO(Unknown): Migrate to Resultsv2
+  Future<Result<AvatarError, bool>> unsubscribe(String jid) async {
-  Future<bool> unsubscribe(String jid) async {
     await _getPubSubManager().unsubscribe(jid, userAvatarDataXmlns);
     await _getPubSubManager().subscribe(jid, userAvatarMetadataXmlns);
 
-    return true;
+    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.
-  // TODO(Unknown): Migrate to Resultsv2
+  Future<Result<AvatarError, String>> getAvatarId(String jid) async {
-  Future<String?> getAvatarId(String jid) async {
     final disco = getAttributes().getManagerById(discoManager)! as DiscoManager;
-    final response = await disco.discoItemsQuery(jid, node: userAvatarDataXmlns);
+    final response = await disco.discoItemsQuery(
-    if (response.isType<DiscoError>()) return null;
+      jid,
+      node: userAvatarDataXmlns,
+      shouldEncrypt: false,
+    );
+    if (response.isType<DiscoError>()) return Result(UnknownAvatarError());
 
     final items = response.get<List<DiscoItem>>();
-    if (items.isEmpty) return null;
+    if (items.isEmpty) return Result(UnknownAvatarError());
 
-    return items.first.name;
+    return Result(items.first.name);
   }
 }

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

@@ -6,48 +6,45 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
-enum ChatState {
+enum ChatState { active, composing, paused, inactive, gone }
-  active,
-  composing,
-  paused,
-  inactive,
-  gone
-}
 
 ChatState chatStateFromString(String raw) {
   switch (raw) {
-    case 'active': {
+    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: {
+    default:
+      {
         return ChatState.gone;
       }
   }
 }
+
 String chatStateToString(ChatState state) => state.toString().split('.').last;
 
 class ChatStateManager extends XmppManagerBase {
+  ChatStateManager() : super(chatStateManager);
+
   @override
   List<String> getDiscoFeatures() => [chatStateXmlns];
 
-  @override
-  String getName() => 'ChatStateManager';
-
-  @override
-  String getId() => chatStateManager;
-
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
         StanzaHandler(
@@ -62,32 +59,41 @@ class ChatStateManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onChatStateReceived(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onChatStateReceived(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     final element = state.stanza.firstTagByXmlns(chatStateXmlns)!;
     ChatState? chatState;
 
     switch (element.tag) {
-      case 'active': {
+      case 'active':
+        {
           chatState = ChatState.active;
         }
         break;
-      case 'composing': {
+      case 'composing':
+        {
           chatState = ChatState.composing;
         }
         break;
-      case 'paused': {
+      case 'paused':
+        {
           chatState = ChatState.paused;
         }
         break;
-      case 'inactive': {
+      case 'inactive':
+        {
           chatState = ChatState.inactive;
         }
         break;
-      case 'gone': {
+      case 'gone':
+        {
           chatState = ChatState.gone;
         }
         break;
-      default: {
+      default:
+        {
           logger.warning("Received invalid chat state '${element.tag}'");
         }
     }
@@ -97,7 +103,11 @@ class ChatStateManager extends XmppManagerBase {
 
   /// Send a chat state notification to [to]. You can specify the type attribute
   /// of the message with [messageType].
-  void sendChatState(ChatState state, String to, { String messageType = 'chat' }) {
+  void sendChatState(
+    ChatState state,
+    String to, {
+    String messageType = 'chat',
+  }) {
     final tagName = state.toString().split('.').last;
 
     getAttributes().sendStanza(

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

@@ -1,10 +1,18 @@
 import 'dart:convert';
 import 'package:cryptography/cryptography.dart';
+import 'package:meta/meta.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/presence.dart';
 import 'package:moxxmpp/src/rfcs/rfc_4790.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_0414.dart';
 
+@immutable
 class CapabilityHashInfo {
-
   const CapabilityHashInfo(this.ver, this.node, this.hash);
   final String ver;
   final String node;
@@ -13,10 +21,16 @@ class CapabilityHashInfo {
 
 /// Calculates the Entitiy Capability hash according to XEP-0115 based on the
 /// disco information.
-Future<String> calculateCapabilityHash(DiscoInfo info, HashAlgorithm algorithm) async {
+Future<String> calculateCapabilityHash(
+  DiscoInfo info,
+  HashAlgorithm algorithm,
+) async {
   final buffer = StringBuffer();
   final identitiesSorted = info.identities
-    .map((Identity i) => '${i.category}/${i.type}/${i.lang ?? ""}/${i.name ?? ""}')
+      .map(
+        (Identity i) =>
+            '${i.category}/${i.type}/${i.lang ?? ""}/${i.name ?? ""}',
+      )
       .toList();
   // ignore: cascade_invocations
   identitiesSorted.sort(ioctetSortComparator);
@@ -28,7 +42,8 @@ Future<String> calculateCapabilityHash(DiscoInfo info, HashAlgorithm algorithm)
 
   if (info.extendedInfo.isNotEmpty) {
     final sortedExt = info.extendedInfo
-      ..sort((a, b) => ioctetSortComparator(
+      ..sort(
+        (a, b) => ioctetSortComparator(
           a.getFieldByVar('FORM_TYPE')!.values.first,
           b.getFieldByVar('FORM_TYPE')!.values.first,
         ),
@@ -37,7 +52,9 @@ Future<String> calculateCapabilityHash(DiscoInfo info, HashAlgorithm algorithm)
     for (final ext in sortedExt) {
       buffer.write('${ext.getFieldByVar("FORM_TYPE")!.values.first}<');
 
-      final sortedFields = ext.fields..sort((a, b) => ioctetSortComparator(
+      final sortedFields = ext.fields
+        ..sort(
+          (a, b) => ioctetSortComparator(
             a.varAttr!,
             b.varAttr!,
           ),
@@ -55,5 +72,84 @@ Future<String> calculateCapabilityHash(DiscoInfo info, HashAlgorithm algorithm)
     }
   }
 
-  return base64.encode((await algorithm.hash(utf8.encode(buffer.toString()))).bytes);
+  return base64
+      .encode((await algorithm.hash(utf8.encode(buffer.toString()))).bytes);
+}
+
+/// A manager implementing the advertising of XEP-0115. It responds to the
+/// disco#info requests on the specified node with the information provided by
+/// the DiscoManager.
+/// NOTE: This manager requires that the DiscoManager is also registered.
+class EntityCapabilitiesManager extends XmppManagerBase {
+  EntityCapabilitiesManager(this._capabilityHashBase)
+      : super(entityCapabilitiesManager);
+
+  /// The string that is both the node under which we advertise the disco info
+  /// and the base for the actual node on which we respond to disco#info requests.
+  final String _capabilityHashBase;
+
+  /// The cached capability hash.
+  String? _capabilityHash;
+
+  @override
+  Future<bool> isSupported() async => true;
+
+  @override
+  List<String> getDiscoFeatures() => [capsXmlns];
+
+  /// Computes, if required, the capability hash of the data provided by
+  /// the DiscoManager.
+  Future<String> getCapabilityHash() async {
+    _capabilityHash ??= await calculateCapabilityHash(
+      getAttributes()
+          .getManagerById<DiscoManager>(discoManager)!
+          .getDiscoInfo(null),
+      getHashByName('sha-1')!,
+    );
+
+    return _capabilityHash!;
+  }
+
+  Future<String> _getNode() async {
+    final hash = await getCapabilityHash();
+    return '$_capabilityHashBase#$hash';
+  }
+
+  Future<DiscoInfo> _onInfoQuery() async {
+    return getAttributes()
+        .getManagerById<DiscoManager>(discoManager)!
+        .getDiscoInfo(await _getNode());
+  }
+
+  Future<List<XMLNode>> _prePresenceSent() async {
+    return [
+      XMLNode.xmlns(
+        tag: 'c',
+        xmlns: capsXmlns,
+        attributes: {
+          'hash': 'sha-1',
+          'node': _capabilityHashBase,
+          'ver': await getCapabilityHash(),
+        },
+      ),
+    ];
+  }
+
+  @override
+  Future<void> postRegisterCallback() async {
+    await super.postRegisterCallback();
+
+    getAttributes()
+        .getManagerById<DiscoManager>(discoManager)!
+        .registerInfoCallback(
+          await _getNode(),
+          _onInfoQuery,
+        );
+
+    getAttributes()
+        .getManagerById<PresenceManager>(presenceManager)!
+        .registerPreSendCallback(
+          _prePresenceSent,
+        );
+  }
 }

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

@@ -24,15 +24,11 @@ XMLNode makeMessageDeliveryResponse(String id) {
 }
 
 class MessageDeliveryReceiptManager extends XmppManagerBase {
+  MessageDeliveryReceiptManager() : super(messageDeliveryReceiptManager);
+
   @override
   List<String> getDiscoFeatures() => [deliveryXmlns];
 
-  @override
-  String getName() => 'MessageDeliveryReceiptManager';
-
-  @override
-  String getId() => messageDeliveryReceiptManager;
-
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
         StanzaHandler(
@@ -56,15 +52,24 @@ class MessageDeliveryReceiptManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onDeliveryRequestReceived(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onDeliveryRequestReceived(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     return state.copyWith(deliveryReceiptRequested: true);
   }
 
-  Future<StanzaHandlerData> _onDeliveryReceiptReceived(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onDeliveryReceiptReceived(
+    Stanza message,
+    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)) {
+      if (!['origin-id', 'stanza-id', 'delay', 'store', 'received']
-        logger.info("Won't handle stanza as delivery receipt because we found an '${item.tag}' element");
+          .contains(item.tag)) {
+        logger.info(
+          "Won't handle stanza as delivery receipt because we found an '${item.tag}' element",
+        );
 
         return state.copyWith(done: true);
       }

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

@@ -9,16 +9,10 @@ import 'package:moxxmpp/src/stringxml.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
 
 class BlockingManager extends XmppManagerBase {
-  BlockingManager() : _supported = false, _gotSupported = false, super();
+  BlockingManager() : super(blockingManager);
 
-  bool _supported;
+  bool _supported = false;
-  bool _gotSupported;
+  bool _gotSupported = false;
-
-  @override
-  String getId() => blockingManager;
-
-  @override
-  String getName() => 'BlockingManager';
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -52,25 +46,37 @@ class BlockingManager extends XmppManagerBase {
 
   @override
   Future<void> onXmppEvent(XmppEvent event) async {
-    if (event is StreamResumeFailedEvent) {
+    if (event is StreamNegotiationsDoneEvent) {
+      final newStream = await isNewStream();
+      if (newStream) {
         _gotSupported = false;
         _supported = false;
       }
     }
+  }
 
-  Future<StanzaHandlerData> _blockPush(Stanza iq, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _blockPush(
+    Stanza iq,
+    StanzaHandlerData state,
+  ) async {
     final block = iq.firstTag('block', xmlns: blockingXmlns)!;
 
     getAttributes().sendEvent(
       BlocklistBlockPushEvent(
-        items: block.findTags('item').map((i) => i.attributes['jid']! as String).toList(),
+        items: block
+            .findTags('item')
+            .map((i) => i.attributes['jid']! as String)
+            .toList(),
       ),
     );
 
     return state.copyWith(done: true);
   }
 
-  Future<StanzaHandlerData> _unblockPush(Stanza iq, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _unblockPush(
+    Stanza iq,
+    StanzaHandlerData state,
+  ) async {
     final unblock = iq.firstTag('unblock', xmlns: blockingXmlns)!;
     final items = unblock.findTags('item');
 
@@ -97,14 +103,12 @@ class BlockingManager extends XmppManagerBase {
           XMLNode.xmlns(
             tag: 'block',
             xmlns: blockingXmlns,
-            children: items
+            children: items.map((item) {
-              .map((item) {
               return XMLNode(
                 tag: 'item',
                 attributes: <String, String>{'jid': item},
               );
-              })
+            }).toList(),
-              .toList(),
           )
         ],
       ),
@@ -139,10 +143,14 @@ class BlockingManager extends XmppManagerBase {
           XMLNode.xmlns(
             tag: 'unblock',
             xmlns: blockingXmlns,
-            children: items.map((item) => XMLNode(
+            children: items
+                .map(
+                  (item) => XMLNode(
                     tag: 'item',
                     attributes: <String, String>{'jid': item},
-            ),).toList(),
+                  ),
+                )
+                .toList(),
           )
         ],
       ),
@@ -165,6 +173,9 @@ class BlockingManager extends XmppManagerBase {
     );
 
     final blocklist = result.firstTag('blocklist', xmlns: blockingXmlns)!;
-    return blocklist.findTags('item').map((item) => item.attributes['jid']! as String).toList();
+    return blocklist
+        .findTags('item')
+        .map((item) => item.attributes['jid']! as String)
+        .toList();
   }
 }

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

@@ -54,25 +54,32 @@ class StreamManagementNegotiator extends XmppFeatureNegotiatorBase {
     } else {
       // We cannot do a stream resumption
       final br = attributes.getNegotiatorById(resourceBindingNegotiator);
-      return super.matchesFeature(features) && br?.state == NegotiatorState.done && attributes.isAuthenticated();
+      return super.matchesFeature(features) &&
+          br?.state == NegotiatorState.done &&
+          attributes.isAuthenticated();
     }
   }
 
   @override
-  Future<Result<NegotiatorState, NegotiatorError>> negotiate(XMLNode nonza) async {
+  Future<Result<NegotiatorState, NegotiatorError>> negotiate(
+    XMLNode nonza,
+  ) async {
     // negotiate is only called when we matched the stream feature, so we know
     // that the server advertises it.
     _supported = true;
 
     switch (_state) {
       case _StreamManagementNegotiatorState.ready:
-        final sm = attributes.getManagerById<StreamManagementManager>(smManager)!;
+        final sm =
+            attributes.getManagerById<StreamManagementManager>(smManager)!;
         final srid = sm.state.streamResumptionId;
         final h = sm.state.s2c;
 
         // Attempt stream resumption first
         if (srid != null) {
-          _log.finest('Found stream resumption Id. Attempting to perform stream resumption');
+          _log.finest(
+            'Found stream resumption Id. Attempting to perform stream resumption',
+          );
           _state = _StreamManagementNegotiatorState.resumeRequested;
           attributes.sendNonza(StreamManagementResumeNonza(srid, h));
         } else {
@@ -86,7 +93,10 @@ class StreamManagementNegotiator extends XmppFeatureNegotiatorBase {
         if (nonza.tag == 'resumed') {
           _log.finest('Stream Management resumption successful');
 
-            assert(attributes.getFullJID().resource != '', 'Resume only works when we already have a resource bound and know about it');
+          assert(
+            attributes.getFullJID().resource != '',
+            'Resume only works when we already have a resource bound and know about it',
+          );
 
           final csi = attributes.getManagerById(csiManager) as CSIManager?;
           if (csi != null) {
@@ -101,9 +111,12 @@ class StreamManagementNegotiator extends XmppFeatureNegotiatorBase {
           return const Result(NegotiatorState.skipRest);
         } else {
           // We assume it is <failed />
-            _log.info('Stream resumption failed. Expected <resumed />, got ${nonza.tag}, Proceeding with new stream...');
+          _log.info(
+            'Stream resumption failed. Expected <resumed />, got ${nonza.tag}, Proceeding with new stream...',
+          );
           await attributes.sendEvent(StreamResumeFailedEvent());
-            final sm = attributes.getManagerById<StreamManagementManager>(smManager)!;
+          final sm =
+              attributes.getManagerById<StreamManagementManager>(smManager)!;
 
           // 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.
@@ -121,7 +134,8 @@ class StreamManagementNegotiator extends XmppFeatureNegotiatorBase {
           _log.finest('Stream Management enabled');
 
           final id = nonza.attributes['id'] as String?;
-          if (id != null && ['true', '1'].contains(nonza.attributes['resume'])) {
+          if (id != null &&
+              ['true', '1'].contains(nonza.attributes['resume'])) {
             _log.info('Stream Resumption available');
           }
 

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

@@ -2,17 +2,16 @@ import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stringxml.dart';
 
 class StreamManagementEnableNonza extends XMLNode {
-  StreamManagementEnableNonza() : super(
+  StreamManagementEnableNonza()
+      : super(
           tag: 'enable',
-    attributes: <String, String>{
+          attributes: <String, String>{'xmlns': smXmlns, 'resume': 'true'},
-      'xmlns': smXmlns,
-      'resume': 'true'
-    },
         );
 }
 
 class StreamManagementResumeNonza extends XMLNode {
-  StreamManagementResumeNonza(String id, int h) : super(
+  StreamManagementResumeNonza(String id, int h)
+      : super(
           tag: 'resume',
           attributes: <String, String>{
             'xmlns': smXmlns,
@@ -23,17 +22,16 @@ class StreamManagementResumeNonza extends XMLNode {
 }
 
 class StreamManagementAckNonza extends XMLNode {
-  StreamManagementAckNonza(int h) : super(
+  StreamManagementAckNonza(int h)
+      : super(
           tag: 'a',
-    attributes: <String, String>{
+          attributes: <String, String>{'xmlns': smXmlns, 'h': h.toString()},
-      'xmlns': smXmlns,
-      'h': h.toString()
-    },
         );
 }
 
 class StreamManagementRequestNonza extends XMLNode {
-  StreamManagementRequestNonza() : super(
+  StreamManagementRequestNonza()
+      : super(
           tag: 'r',
           attributes: <String, String>{
             'xmlns': smXmlns,

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

@@ -7,13 +7,12 @@ part 'state.g.dart';
 class StreamManagementState with _$StreamManagementState {
   factory StreamManagementState(
     int c2s,
-    int s2c,
+    int s2c, {
-    {
     String? streamResumptionLocation,
     String? streamResumptionId,
-    }
+  }) = _StreamManagementState;
-  ) = _StreamManagementState;
 
   // JSON
-  factory StreamManagementState.fromJson(Map<String, dynamic> json) => _$StreamManagementStateFromJson(json);
+  factory StreamManagementState.fromJson(Map<String, dynamic> json) =>
+      _$StreamManagementStateFromJson(json);
 }

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

@@ -21,40 +21,41 @@ const xmlUintMax = 4294967296; // 2**32
 typedef StanzaAckedCallback = bool Function(Stanza stanza);
 
 class StreamManagementManager extends XmppManagerBase {
-
   StreamManagementManager({
     this.ackTimeout = const Duration(seconds: 30),
-  })
+  }) : super(smManager);
-  : _state = StreamManagementState(0, 0),
+
-    _unackedStanzas = {},
-    _stateLock = Lock(),
-    _streamManagementEnabled = false,
-    _lastAckTimestamp = -1,
-    _pendingAcks = 0,
-    _streamResumed = false,
-    _ackLock = Lock();
   /// The queue of stanzas that are not (yet) acked
-  final Map<int, Stanza> _unackedStanzas;
+  final Map<int, Stanza> _unackedStanzas = {};
+
   /// Commitable state of the StreamManagementManager
-  StreamManagementState _state;
+  StreamManagementState _state = StreamManagementState(0, 0);
+
   /// Mutex lock for _state
-  final Lock _stateLock;
+  final Lock _stateLock = Lock();
+
   /// If the have enabled SM on the stream yet
-  bool _streamManagementEnabled;
+  bool _streamManagementEnabled = false;
+
   /// If the current stream has been resumed;
-  bool _streamResumed;
+  bool _streamResumed = false;
+
   /// The time in which the response to an ack is still valid. Counts as a timeout
   /// otherwise
   @internal
   final Duration ackTimeout;
+
   /// The time at which the last ack has been sent
-  int _lastAckTimestamp;
+  int _lastAckTimestamp = -1;
+
   /// The timer to see if we timed the connection out
   Timer? _ackTimer;
+
   /// Counts how many acks we're waiting for
-  int _pendingAcks;
+  int _pendingAcks = 0;
+
   /// Lock for both [_lastAckTimestamp] and [_pendingAcks].
-  final Lock _ackLock;
+  final Lock _ackLock = Lock();
 
   /// Functions for testing
   @visibleForTesting
@@ -82,7 +83,11 @@ class StreamManagementManager extends XmppManagerBase {
 
   @override
   Future<bool> isSupported() async {
-    return getAttributes().getNegotiatorById<StreamManagementNegotiator>(streamManagementNegotiator)!.isSupported;
+    return getAttributes()
+        .getNegotiatorById<StreamManagementNegotiator>(
+          streamManagementNegotiator,
+        )!
+        .isSupported;
   }
 
   /// Returns the amount of stanzas waiting to get acked
@@ -121,12 +126,6 @@ class StreamManagementManager extends XmppManagerBase {
 
   bool get streamResumed => _streamResumed;
 
-  @override
-  String getId() => smManager;
-
-  @override
-  String getName() => 'StreamManagementManager';
-
   @override
   List<NonzaHandler> getNonzaHandlers() => [
         NonzaHandler(
@@ -142,7 +141,7 @@ class StreamManagementManager extends XmppManagerBase {
       ];
 
   @override
-  List<StanzaHandler> getIncomingStanzaHandlers() => [
+  List<StanzaHandler> getIncomingPreStanzaHandlers() => [
         StanzaHandler(
           callback: _onServerStanzaReceived,
           priority: 9999,
@@ -185,9 +184,18 @@ class StreamManagementManager extends XmppManagerBase {
       _disableStreamManagement();
       _streamResumed = false;
     } else if (event is ConnectionStateChangedEvent) {
-      if (event.state == XmppConnectionState.connected) {
+      switch (event.state) {
+        case XmppConnectionState.connected:
           // Push out all pending stanzas
           await onStreamResumed(0);
+          break;
+        case XmppConnectionState.error:
+        case XmppConnectionState.notConnected:
+          _stopAckTimer();
+          break;
+        case XmppConnectionState.connecting:
+          // NOOP
+          break;
       }
     }
   }
@@ -219,7 +227,8 @@ class StreamManagementManager extends XmppManagerBase {
     _ackLock.synchronized(() async {
       final now = DateTime.now().millisecondsSinceEpoch;
 
-      if (now - _lastAckTimestamp >= ackTimeout.inMilliseconds && _pendingAcks > 0) {
+      if (now - _lastAckTimestamp >= ackTimeout.inMilliseconds &&
+          _pendingAcks > 0) {
         _stopAckTimer();
         await getAttributes().getConnection().reconnectionPolicy.onFailure();
       }
@@ -318,7 +327,9 @@ class StreamManagementManager extends XmppManagerBase {
       }
 
       if (h > _state.c2s) {
-          logger.info('C2S height jumped from ${_state.c2s} (local) to $h (remote).');
+        logger.info(
+          'C2S height jumped from ${_state.c2s} (local) to $h (remote).',
+        );
         // ignore: cascade_invocations
         logger.info('Proceeding with $h as local C2S counter.');
 
@@ -342,6 +353,7 @@ class StreamManagementManager extends XmppManagerBase {
       logger.fine('_incrementC2S: Releasing lock...');
     });
   }
+
   Future<void> _incrementS2C() async {
     logger.fine('_incrementS2C: Waiting to aquire lock...');
     await _stateLock.synchronized(() async {
@@ -353,13 +365,19 @@ class StreamManagementManager extends XmppManagerBase {
   }
 
   /// Called whenever we receive a stanza from the server.
-  Future<StanzaHandlerData> _onServerStanzaReceived(Stanza stanza, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onServerStanzaReceived(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
     await _incrementS2C();
     return state;
   }
 
   /// Called whenever we send a stanza.
-  Future<StanzaHandlerData> _onClientStanzaSent(Stanza stanza, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onClientStanzaSent(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
     await _incrementC2S();
     _unackedStanzas[_state.c2s] = stanza;
 

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

@@ -8,19 +8,13 @@ import 'package:moxxmpp/src/stanza.dart';
 
 @immutable
 class DelayedDelivery {
-
   const DelayedDelivery(this.from, this.timestamp);
   final DateTime timestamp;
   final String from;
 }
 
 class DelayedDeliveryManager extends XmppManagerBase {
-
+  DelayedDeliveryManager() : super(delayedDeliveryManager);
-  @override
-  String getId() => delayedDeliveryManager;
-
-  @override
-  String getName() => 'DelayedDeliveryManager';
 
   @override
   Future<bool> isSupported() async => true;
@@ -34,7 +28,10 @@ class DelayedDeliveryManager extends XmppManagerBase {
         ),
       ];
 
-  Future<StanzaHandlerData> _onIncomingMessage(Stanza stanza, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onIncomingMessage(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
     final delay = stanza.firstTag('delay', xmlns: delayedDeliveryXmlns);
     if (delay == null) return state;
 

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

@@ -12,27 +12,26 @@ import 'package:moxxmpp/src/stringxml.dart';
 import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
 import 'package:moxxmpp/src/xeps/xep_0297.dart';
 
+/// This manager class implements support for XEP-0280.
 class CarbonsManager extends XmppManagerBase {
+  CarbonsManager() : super(carbonsManager);
 
-  CarbonsManager() : _isEnabled = false, _supported = false, _gotSupported = false, super();
+  /// Indicates that message carbons are enabled.
-  bool _isEnabled;
+  bool _isEnabled = false;
-  bool _supported;
+
-  bool _gotSupported;
+  /// Indicates that the server supports message carbons.
+  bool _supported = false;
+
+  /// Indicates that we know that [CarbonsManager._supported] is accurate.
+  bool _gotSupported = false;
 
   @override
-  String getId() => carbonsManager;
+  List<StanzaHandler> getIncomingPreStanzaHandlers() => [
-
-  @override
-  String getName() => 'CarbonsManager';
-
-  @override
-  List<StanzaHandler> getIncomingStanzaHandlers() => [
         StanzaHandler(
           stanzaTag: 'message',
           tagName: 'received',
           tagXmlns: carbonsXmlns,
           callback: _onMessageReceived,
-      // Before all managers the message manager depends on
           priority: -98,
         ),
         StanzaHandler(
@@ -40,7 +39,6 @@ class CarbonsManager extends XmppManagerBase {
           tagName: 'sent',
           tagXmlns: carbonsXmlns,
           callback: _onMessageSent,
-      // Before all managers the message manager depends on
           priority: -98,
         )
       ];
@@ -61,23 +59,20 @@ class CarbonsManager extends XmppManagerBase {
 
   @override
   Future<void> onXmppEvent(XmppEvent event) async {
-    if (event is ServerDiscoDoneEvent && !_isEnabled) {
+    if (event is StreamNegotiationsDoneEvent) {
-      final attrs = getAttributes();
+      // Reset disco cache info on a new stream
-
+      final newStream = await isNewStream();
-      if (attrs.isFeatureSupported(carbonsXmlns)) {
+      if (newStream) {
-        logger.finest('Message carbons supported. Enabling...');
-        await enableCarbons();
-        logger.finest('Message carbons enabled');
-      } else {
-        logger.info('Message carbons not supported.');
-      }
-    } else if (event is StreamResumeFailedEvent) {
         _gotSupported = false;
         _supported = false;
       }
     }
+  }
 
-  Future<StanzaHandlerData> _onMessageReceived(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessageReceived(
+    Stanza message,
+    StanzaHandlerData state,
+  ) 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);
@@ -91,7 +86,10 @@ class CarbonsManager extends XmppManagerBase {
     );
   }
 
-  Future<StanzaHandlerData> _onMessageSent(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessageSent(
+    Stanza message,
+    StanzaHandlerData state,
+  ) 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);
@@ -105,9 +103,14 @@ class CarbonsManager extends XmppManagerBase {
     );
   }
 
+  /// Send a request to the server, asking it to enable Message Carbons.
+  ///
+  /// Returns true if carbons were enabled. False, if not.
   Future<bool> enableCarbons() async {
-    final result = await getAttributes().sendStanza(
+    final attrs = getAttributes();
+    final result = await attrs.sendStanza(
       Stanza.iq(
+        to: attrs.getFullJID().toBare().toString(),
         type: 'set',
         children: [
           XMLNode.xmlns(
@@ -132,6 +135,9 @@ class CarbonsManager extends XmppManagerBase {
     return true;
   }
 
+  /// Send a request to the server, asking it to disable Message Carbons.
+  ///
+  /// Returns true if carbons were disabled. False, if not.
   Future<bool> disableCarbons() async {
     final result = await getAttributes().sendStanza(
       Stanza.iq(
@@ -159,12 +165,23 @@ class CarbonsManager extends XmppManagerBase {
     return true;
   }
 
+  /// True if Message Carbons are enabled. False, if not.
+  bool get isEnabled => _isEnabled;
+
   @visibleForTesting
   void forceEnable() {
     _isEnabled = true;
   }
 
+  /// Checks if a carbon sent by [senderJid] is valid to prevent vulnerabilities like
+  /// the ones listed at https://xmpp.org/extensions/xep-0280.html#security.
+  ///
+  /// Returns true if the carbon is valid. Returns false if not.
   bool isCarbonValid(JID senderJid) {
-    return _isEnabled && senderJid == getAttributes().getConnectionSettings().jid.toBare();
+    return _isEnabled &&
+        getAttributes().getFullJID().bareCompare(
+              senderJid,
+              ensureBare: true,
+            );
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0297.dart

@@ -4,7 +4,10 @@ import 'package:moxxmpp/src/stringxml.dart';
 
 /// Extracts the message stanza from the <forwarded /> node.
 Stanza unpackForwarded(XMLNode forwarded) {
-  assert(forwarded.attributes['xmlns'] == forwardedXmlns, 'Invalid element xmlns');
+  assert(
+    forwarded.attributes['xmlns'] == forwardedXmlns,
+    'Invalid element xmlns',
+  );
   assert(forwarded.tag == 'forwarded', 'Invalid element name');
 
   // NOTE: We only use this XEP (for now) in the context of Message Carbons

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

@@ -61,11 +61,7 @@ HashFunction hashFunctionFromName(String name) {
 }
 
 class CryptographicHashManager extends XmppManagerBase {
-  @override
+  CryptographicHashManager() : super(cryptographicHashManager);
-  String getId() => cryptographicHashManager;
-
-  @override
-  String getName() => 'CryptographicHashManager';
 
   @override
   Future<bool> isSupported() async => true;
@@ -80,8 +76,11 @@ class CryptographicHashManager extends XmppManagerBase {
         '$hashFunctionNameBaseXmlns:$hashBlake2b512',
       ];
 
-  static Future<List<int>> hashFromData(List<int> data, HashFunction function) async {
+  static Future<List<int>> hashFromData(
-    // TODO(PapaTutuWawa): Implemen the others as well
+    List<int> data,
+    HashFunction function,
+  ) async {
+    // TODO(PapaTutuWawa): Implement the others as well
     HashAlgorithm algo;
     switch (function) {
       case HashFunction.sha256:

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

@@ -17,11 +17,7 @@ XMLNode makeLastMessageCorrectionEdit(String id) {
 }
 
 class LastMessageCorrectionManager extends XmppManagerBase {
-  @override
+  LastMessageCorrectionManager() : super(lastMessageCorrectionManager);
-  String getName() => 'LastMessageCorrectionManager';
-
-  @override
-  String getId() => lastMessageCorrectionManager;
 
   @override
   List<String> getDiscoFeatures() => [lmcXmlns];
@@ -41,7 +37,10 @@ class LastMessageCorrectionManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onMessage(Stanza stanza, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessage(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
     final edit = stanza.firstTag('replace', xmlns: lmcXmlns)!;
     return state.copyWith(
       lastMessageCorrectionSid: edit.attributes['id']! as String,

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

@@ -16,7 +16,10 @@ XMLNode makeChatMarkerMarkable() {
 }
 
 XMLNode makeChatMarker(String tag, String id) {
-  assert(['received', 'displayed', 'acknowledged'].contains(tag), 'Invalid chat marker');
+  assert(
+    ['received', 'displayed', 'acknowledged'].contains(tag),
+    'Invalid chat marker',
+  );
   return XMLNode.xmlns(
     tag: tag,
     xmlns: chatMarkersXmlns,
@@ -25,11 +28,7 @@ XMLNode makeChatMarker(String tag, String id) {
 }
 
 class ChatMarkerManager extends XmppManagerBase {
-  @override
+  ChatMarkerManager() : super(chatMarkerManager);
-  String getName() => 'ChatMarkerManager';
-
-  @override
-  String getId() => chatMarkerManager;
 
   @override
   List<String> getDiscoFeatures() => [chatMarkersXmlns];
@@ -48,7 +47,10 @@ class ChatMarkerManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onMessage(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessage(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     final marker = message.firstTagByXmlns(chatMarkersXmlns)!;
 
     // Handle the <markable /> explicitly
@@ -57,11 +59,13 @@ class ChatMarkerManager extends XmppManagerBase {
     if (!['received', 'displayed', 'acknowledged'].contains(marker.tag)) {
       logger.warning("Unknown message marker '${marker.tag}' found.");
     } else {
-      getAttributes().sendEvent(ChatMarkerEvent(
+      getAttributes().sendEvent(
+        ChatMarkerEvent(
           from: JID.fromString(message.from!),
           type: marker.tag,
           id: marker.attributes['id']! as String,
-      ),);
+        ),
+      );
     }
 
     return state.copyWith(done: true);

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

@@ -8,8 +8,22 @@ enum MessageProcessingHint {
   store,
 }
 
-/// NOTE: We do not define a function for turning a Message Processing Hint element into
+MessageProcessingHint messageProcessingHintFromXml(XMLNode element) {
-///       an enum value since the elements do not concern us as a client.
+  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;
+  }
+
+  assert(false, 'Invalid Message Processing Hint: ${element.tag}');
+  return MessageProcessingHint.noStore;
+}
+
 extension XmlExtension on MessageProcessingHint {
   XMLNode toXml() {
     String tag;

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

@@ -7,33 +7,33 @@ import 'package:moxxmpp/src/stringxml.dart';
 import 'package:moxxmpp/src/types/result.dart';
 
 class CSIActiveNonza extends XMLNode {
-  CSIActiveNonza() : super(
+  CSIActiveNonza()
+      : super(
           tag: 'active',
-    attributes: <String, String>{
+          attributes: <String, String>{'xmlns': csiXmlns},
-      'xmlns': csiXmlns
-    },
         );
 }
 
 class CSIInactiveNonza extends XMLNode {
-  CSIInactiveNonza() : super(
+  CSIInactiveNonza()
+      : super(
           tag: 'inactive',
-    attributes: <String, String>{
+          attributes: <String, String>{'xmlns': csiXmlns},
-      'xmlns': csiXmlns
-    },
         );
 }
 
 /// A Stub negotiator that is just for "intercepting" the stream feature.
 class CSINegotiator extends XmppFeatureNegotiatorBase {
-  CSINegotiator() : _supported = false, super(11, false, csiXmlns, csiNegotiator);
+  CSINegotiator() : super(11, false, csiXmlns, csiNegotiator);
 
   /// True if CSI is supported. False otherwise.
-  bool _supported;
+  bool _supported = false;
   bool get isSupported => _supported;
 
   @override
-  Future<Result<NegotiatorState, NegotiatorError>> negotiate(XMLNode nonza) async {
+  Future<Result<NegotiatorState, NegotiatorError>> negotiate(
+    XMLNode nonza,
+  ) async {
     // negotiate is only called when the negotiator matched, meaning the server
     // advertises CSI.
     _supported = true;
@@ -50,19 +50,15 @@ class CSINegotiator extends XmppFeatureNegotiatorBase {
 
 /// The manager requires a CSINegotiator to be registered as a feature negotiator.
 class CSIManager extends XmppManagerBase {
+  CSIManager() : super(csiManager);
 
-  CSIManager() : _isActive = true, super();
+  bool _isActive = true;
-  bool _isActive; 
-
-  @override
-  String getId() => csiManager;
-
-  @override
-  String getName() => 'CSIManager';
 
   @override
   Future<bool> isSupported() async {
-    return getAttributes().getNegotiatorById<CSINegotiator>(csiNegotiator)!.isSupported;
+    return getAttributes()
+        .getNegotiatorById<CSINegotiator>(csiNegotiator)!
+        .isSupported;
   }
 
   /// To be called after a stream has been resumed as CSI does not

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

@@ -13,7 +13,6 @@ import 'package:moxxmpp/src/xeps/xep_0030/xep_0030.dart';
 /// 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;
@@ -29,11 +28,7 @@ XMLNode makeOriginIdElement(String id) {
 }
 
 class StableIdManager extends XmppManagerBase {
-  @override
+  StableIdManager() : super(stableIdManager);
-  String getName() => 'StableIdManager';
-
-  @override
-  String getId() => stableIdManager;
 
   @override
   List<String> getDiscoFeatures() => [stableIdXmlns];
@@ -51,7 +46,10 @@ class StableIdManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onMessage(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessage(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     final from = JID.fromString(message.attributes['from']! as String);
     String? originId;
     String? stanzaId;
@@ -79,10 +77,14 @@ class StableIdManager extends XmppManagerBase {
           stanzaId = stanzaIdTag.attributes['id']! as String;
           stanzaIdBy = stanzaIdTag.attributes['by']! as String;
         } else {
-          logger.finest('${from.toString()} does not support $stableIdXmlns. Ignoring stanza id... ');
+          logger.finest(
+            '${from.toString()} does not support $stableIdXmlns. Ignoring stanza id... ',
+          );
         }
       } else {
-        logger.finest('Failed to find out if ${from.toString()} supports $stableIdXmlns. Ignoring... ');
+        logger.finest(
+          'Failed to find out if ${from.toString()} supports $stableIdXmlns. Ignoring... ',
+        );
       }
     }
 

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

@@ -41,22 +41,27 @@ Map<String, String> prepareHeaders(Map<String, String> headers) {
 }
 
 class HttpFileUploadManager extends XmppManagerBase {
-  HttpFileUploadManager() : _gotSupported = false, _supported = false, super();
+  HttpFileUploadManager() : super(httpFileUploadManager);
+
+  /// The entity that we will request file uploads from, if discovered.
   JID? _entityJid;
+
+  /// The maximum file upload file size, if advertised and discovered.
   int? _maxUploadSize;
-  bool _gotSupported;
-  bool _supported;
 
-  @override
+  /// Flag, if we every tried to discover the upload entity.
-  String getId() => httpFileUploadManager;
+  bool _gotSupported = false;
 
-  @override
+  /// Flag, if we can use HTTP File Upload
-  String getName() => 'HttpFileUploadManager';
+  bool _supported = false;
 
   /// 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 listContains(
+      info.identities,
+      (Identity id) => id.category == 'store' && id.type == 'file',
+    );
   }
 
   /// Extract the maximum filesize in octets from the disco response. Returns null
@@ -75,19 +80,24 @@ class HttpFileUploadManager extends XmppManagerBase {
 
   @override
   Future<void> onXmppEvent(XmppEvent event) async {
-    if (event is StreamResumeFailedEvent) {
+    if (event is StreamNegotiationsDoneEvent) {
+      final newStream = await isNewStream();
+      if (newStream) {
         _gotSupported = false;
         _supported = false;
         _entityJid = null;
         _maxUploadSize = null;
       }
     }
+  }
 
   @override
   Future<bool> isSupported() async {
     if (_gotSupported) return _supported;
 
-    final result = await getAttributes().getManagerById<DiscoManager>(discoManager)!.performDiscoSweep();
+    final result = await getAttributes()
+        .getManagerById<DiscoManager>(discoManager)!
+        .performDiscoSweep();
     if (result.isType<DiscoError>()) {
       _gotSupported = false;
       _supported = false;
@@ -97,7 +107,8 @@ class HttpFileUploadManager extends XmppManagerBase {
     final infos = result.get<List<DiscoInfo>>();
     _gotSupported = true;
     for (final info in infos) {
-      if (_containsFileUploadIdentity(info) && info.features.contains(httpFileUploadXmlns)) {
+      if (_containsFileUploadIdentity(info) &&
+          info.features.contains(httpFileUploadXmlns)) {
         logger.info('Discovered HTTP File Upload for ${info.jid}');
 
         _entityJid = info.jid;
@@ -114,16 +125,26 @@ class HttpFileUploadManager extends XmppManagerBase {
   /// the file's size in octets. [contentType] is optional and refers to the file's
   /// Mime type.
   /// Returns an [HttpFileUploadSlot] if the request was successful; null otherwise.
-  Future<Result<HttpFileUploadSlot, HttpFileUploadError>> requestUploadSlot(String filename, int filesize, { String? contentType }) async {
+  Future<Result<HttpFileUploadSlot, HttpFileUploadError>> requestUploadSlot(
-    if (!(await isSupported())) return Result(NoEntityKnownError());
+    String filename,
+    int filesize, {
+    String? contentType,
+  }) async {
+    if (!(await isSupported())) {
+      return Result(NoEntityKnownError());
+    }
 
     if (_entityJid == null) {
-      logger.warning('Attempted to request HTTP File Upload slot but no entity is known to send this request to.');
+      logger.warning(
+        'Attempted to request HTTP File Upload slot but no entity is known to send this request to.',
+      );
       return Result(NoEntityKnownError());
     }
 
     if (_maxUploadSize != null && filesize > _maxUploadSize!) {
-      logger.warning('Attempted to request HTTP File Upload slot for a file that exceeds the filesize limit');
+      logger.warning(
+        'Attempted to request HTTP File Upload slot for a file that exceeds the filesize limit',
+      );
       return Result(FileTooBigError());
     }
 

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

@@ -18,25 +18,39 @@ enum ExplicitEncryptionType {
 
 String _explicitEncryptionTypeToString(ExplicitEncryptionType type) {
   switch (type) {
-    case ExplicitEncryptionType.otr: return emeOtr;
+    case ExplicitEncryptionType.otr:
-    case ExplicitEncryptionType.legacyOpenPGP: return emeLegacyOpenPGP;
+      return emeOtr;
-    case ExplicitEncryptionType.openPGP: return emeOpenPGP;
+    case ExplicitEncryptionType.legacyOpenPGP:
-    case ExplicitEncryptionType.omemo: return emeOmemo;
+      return emeLegacyOpenPGP;
-    case ExplicitEncryptionType.omemo1: return emeOmemo1;
+    case ExplicitEncryptionType.openPGP:
-    case ExplicitEncryptionType.omemo2: return emeOmemo2;
+      return emeOpenPGP;
-    case ExplicitEncryptionType.unknown: return '';
+    case ExplicitEncryptionType.omemo:
+      return emeOmemo;
+    case ExplicitEncryptionType.omemo1:
+      return emeOmemo1;
+    case ExplicitEncryptionType.omemo2:
+      return emeOmemo2;
+    case ExplicitEncryptionType.unknown:
+      return '';
   }
 }
 
 ExplicitEncryptionType _explicitEncryptionTypeFromString(String str) {
   switch (str) {
-    case emeOtr: return ExplicitEncryptionType.otr;
+    case emeOtr:
-    case emeLegacyOpenPGP: return ExplicitEncryptionType.legacyOpenPGP;
+      return ExplicitEncryptionType.otr;
-    case emeOpenPGP: return ExplicitEncryptionType.openPGP;
+    case emeLegacyOpenPGP:
-    case emeOmemo: return ExplicitEncryptionType.omemo;
+      return ExplicitEncryptionType.legacyOpenPGP;
-    case emeOmemo1: return ExplicitEncryptionType.omemo1;
+    case emeOpenPGP:
-    case emeOmemo2: return ExplicitEncryptionType.omemo2;
+      return ExplicitEncryptionType.openPGP;
-    default: return ExplicitEncryptionType.unknown;
+    case emeOmemo:
+      return ExplicitEncryptionType.omemo;
+    case emeOmemo1:
+      return ExplicitEncryptionType.omemo1;
+    case emeOmemo2:
+      return ExplicitEncryptionType.omemo2;
+    default:
+      return ExplicitEncryptionType.unknown;
   }
 }
 
@@ -53,15 +67,7 @@ XMLNode buildEmeElement(ExplicitEncryptionType type) {
 }
 
 class EmeManager extends XmppManagerBase {
-
+  EmeManager() : super(emeManager);
-  EmeManager() : super();
-
-  @override
-  String getId() => emeManager;
-
-  @override
-  String getName() => 'EmeManager';
-
   @override
   Future<bool> isSupported() async => true;
 
@@ -79,7 +85,10 @@ class EmeManager extends XmppManagerBase {
         ),
       ];
 
-  Future<StanzaHandlerData> _onStanzaReceived(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onStanzaReceived(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     final encryption = message.firstTag('encryption', xmlns: emeXmlns)!;
 
     return state.copyWith(

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

@@ -15,6 +15,7 @@ bool checkAffixElements(XMLNode envelope, String sender, JID ourJid) {
   if (to == null) return false;
   final encReceiver = JID.fromString(to);
 
-  return encSender.toBare().toString() == JID.fromString(sender).toBare().toString() &&
+  return encSender.toBare().toString() ==
+          JID.fromString(sender).toBare().toString() &&
       encReceiver.toBare().toString() == ourJid.toBare().toString();
 }

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

@@ -7,3 +7,5 @@ class InvalidAffixElementsException with Exception {}
 class OmemoNotSupportedForContactException extends OmemoError {}
 
 class EncryptionFailedException with Exception {}
+
+class InvalidEnvelopePayloadException with Exception {}

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

@@ -46,7 +46,8 @@ XMLNode bundleToXML(OmemoBundle bundle) {
   for (final pk in bundle.opksEncoded.entries) {
     prekeys.add(
       XMLNode(
-        tag: 'pk', attributes: <String, String>{
+        tag: 'pk',
+        attributes: <String, String>{
           'id': '${pk.key}',
         },
         text: pk.value,

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

@@ -1,6 +1,5 @@
 /// A simple wrapper class for defining elements that should not be encrypted.
 class DoNotEncrypt {
-
   const DoNotEncrypt(this.tag, this.xmlns);
   final String tag;
   final String xmlns;

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

@@ -1,8 +1,6 @@
 import 'dart:async';
-import 'dart:collection';
 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';
@@ -18,6 +16,7 @@ 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';
+import 'package:moxxmpp/src/xeps/xep_0280.dart';
 import 'package:moxxmpp/src/xeps/xep_0334.dart';
 import 'package:moxxmpp/src/xeps/xep_0380.dart';
 import 'package:moxxmpp/src/xeps/xep_0384/crypto.dart';
@@ -25,7 +24,7 @@ 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:synchronized/synchronized.dart';
+import 'package:xml/xml.dart';
 
 const _doNotEncryptList = [
   // XEP-0033
@@ -43,49 +42,33 @@ const _doNotEncryptList = [
   DoNotEncrypt('stanza-id', stableIdXmlns),
 ];
 
-abstract class OmemoManager extends XmppManagerBase {
+@mustCallSuper
-  OmemoManager() : _handlerLock = Lock(), _handlerFutures = {}, super();
+abstract class BaseOmemoManager extends XmppManagerBase {
-
+  BaseOmemoManager() : super(omemoManager);
-  final Lock _handlerLock;
-  final Map<JID, Queue<Completer<void>>> _handlerFutures;
-
-  final Map<JID, List<int>> _deviceMap = {};
-
-  // Mapping whether we already tried to subscribe to the JID's devices node
-  final Map<JID, bool> _subscriptionMap = {};
-  
-  @override
-  String getId() => omemoManager;
-
-  @override
-  String getName() => 'OmemoManager';
 
   // TODO(Unknown): Technically, this is not always true
   @override
   Future<bool> isSupported() async => true;
 
   @override
-  List<StanzaHandler> getIncomingStanzaHandlers() => [
+  List<StanzaHandler> getIncomingPreStanzaHandlers() => [
         StanzaHandler(
           stanzaTag: 'iq',
           tagXmlns: omemoXmlns,
           tagName: 'encrypted',
           callback: _onIncomingStanza,
-      priority: 9999,
         ),
         StanzaHandler(
           stanzaTag: 'presence',
           tagXmlns: omemoXmlns,
           tagName: 'encrypted',
           callback: _onIncomingStanza,
-      priority: 9999,
         ),
         StanzaHandler(
           stanzaTag: 'message',
           tagXmlns: omemoXmlns,
           tagName: 'encrypted',
           callback: _onIncomingStanza,
-      priority: -98,
         ),
       ];
 
@@ -127,58 +110,27 @@ abstract class OmemoManager extends XmppManagerBase {
       } else {
         // Someone published to their device list node
         logger.finest('Got devices $ids');
-        _deviceMap[jid] = ids;
       }
 
+      // Tell the OmemoManager
+      (await getOmemoManager()).onDeviceListUpdate(jid.toString(), ids);
+
       // Generate an event
       getAttributes().sendEvent(OmemoDeviceListUpdatedEvent(jid, ids));
     }
   }
 
   @visibleForOverriding
-  Future<OmemoSessionManager> getSessionManager();
+  Future<OmemoManager> getOmemoManager();
-
-  /// Wrapper around using getSessionManager and then calling encryptToJids on it.
-  Future<EncryptionResult> _encryptToJids(List<String> jids, String? plaintext, { List<OmemoBundle>? newSessions }) async {
-    final session = await getSessionManager();
-    return session.encryptToJids(jids, plaintext, newSessions: newSessions);
-  }
-
-  /// Wrapper around using getSessionManager and then calling encryptToJids on it.
-  Future<String?> _decryptMessage(List<int>? ciphertext, String senderJid, int senderDeviceId, List<EncryptedKey> keys, int sendTimestamp) async {
-    final session = await getSessionManager();
-    return session.decryptMessage(
-      ciphertext,
-      senderJid,
-      senderDeviceId,
-      keys,
-      sendTimestamp,
-    );
-  }
 
   /// Wrapper around using getSessionManager and then calling getDeviceId on it.
-  Future<int> _getDeviceId() async {
+  Future<int> _getDeviceId() async => (await getOmemoManager()).getDeviceId();
-    final session = await getSessionManager();
-    return session.getDeviceId();
-  }
 
   /// Wrapper around using getSessionManager and then calling getDeviceId on it.
   Future<OmemoBundle> _getDeviceBundle() async {
-    final session = await getSessionManager();
+    final om = await getOmemoManager();
-    return session.getDeviceBundle();
+    final device = await om.getDevice();
-  }
+    return device.toBundle();
-
-  /// Wrapper around using getSessionManager and then calling isRatchetAcknowledged on it.
-  Future<bool> _isRatchetAcknowledged(String jid, int deviceId) async {
-    final session = await getSessionManager();
-    return session.isRatchetAcknowledged(jid, deviceId);
-  }
-
-  /// Wrapper around checking if [jid] appears in the session manager's device map.
-  Future<bool> _hasSessionWith(String jid) async {
-    final session = await getSessionManager();
-    final deviceMap = await session.getDeviceMap();
-    return deviceMap.containsKey(jid);
   }
 
   /// Determines what child elements of a stanza should be encrypted. If shouldEncrypt
@@ -205,11 +157,9 @@ abstract class OmemoManager extends XmppManagerBase {
   /// an attached payload, if [children] is not null, or an empty OMEMO message if
   /// [children] is null. This function takes care of creating the affix elements as
   /// specified by both XEP-0420 and XEP-0384.
-  /// [jids] is the list of JIDs the payload should be encrypted for.
+  /// [toJid] is the list of JIDs the payload should be encrypted for.
-  Future<XMLNode> _encryptChildren(List<XMLNode>? children, List<String> jids, String toJid, List<OmemoBundle> newSessions) async {
+  String _buildEnvelope(List<XMLNode> children, String toJid) {
-    XMLNode? payload;
+    final payload = XMLNode.xmlns(
-    if (children != null) {
-      payload = XMLNode.xmlns(
       tag: 'envelope',
       xmlns: sceXmlns,
       children: [
@@ -217,7 +167,6 @@ abstract class OmemoManager extends XmppManagerBase {
           tag: 'content',
           children: children,
         ),
-
         XMLNode(
           tag: 'rpad',
           text: generateRpad(),
@@ -245,16 +194,17 @@ abstract class OmemoManager extends XmppManagerBase {
         */
       ],
     );
+
+    return payload.toXml();
   }
 
-    final encryptedEnvelope = await _encryptToJids(
+  XMLNode _buildEncryptedElement(
-      jids,
+    EncryptionResult result,
-      payload?.toXml(),
+    String recipientJid,
-      newSessions: newSessions,
+    int deviceId,
-    );
+  ) {
-
     final keyElements = <String, List<XMLNode>>{};
-    for (final key in encryptedEnvelope.encryptedKeys) {
+    for (final key in result.encryptedKeys) {
       final keyElement = XMLNode(
         tag: 'key',
         attributes: <String, String>{
@@ -282,11 +232,11 @@ abstract class OmemoManager extends XmppManagerBase {
     }).toList();
 
     var payloadElement = <XMLNode>[];
-    if (payload != null) {
+    if (result.ciphertext != null) {
       payloadElement = [
         XMLNode(
           tag: 'payload',
-          text: base64.encode(encryptedEnvelope.ciphertext!),
+          text: base64.encode(result.ciphertext!),
         ),
       ];
     }
@@ -299,7 +249,7 @@ abstract class OmemoManager extends XmppManagerBase {
         XMLNode(
           tag: 'header',
           attributes: <String, String>{
-            'sid': (await _getDeviceId()).toString(),
+            'sid': deviceId.toString(),
           },
           children: keysElements,
         ),
@@ -307,136 +257,21 @@ abstract class OmemoManager extends XmppManagerBase {
     );
   }
 
-  /// A logging wrapper around acking the ratchet with [jid] with identifier [deviceId].
+  /// For usage with omemo_dart's OmemoManager.
-  Future<void> _ackRatchet(String jid, int deviceId) async {
+  Future<void> sendEmptyMessageImpl(
-    logger.finest('Acking ratchet $jid:$deviceId');
+    EncryptionResult result,
-    final session = await getSessionManager();
+    String toJid,
-    await session.ratchetAcknowledged(jid, deviceId);
+  ) async {
-  }
-
-  /// Figure out if new sessions need to be built. [toJid] is the JID of the entity we
-  /// want to send a message to. [children] refers to the unencrypted children of the
-  /// message. They are required to be passed because shouldIgnoreUnackedRatchets is
-  /// called here.
-  ///
-  /// Either returns a list of bundles we "need" to build a session with or an OmemoError.
-  Future<Result<OmemoError, List<OmemoBundle>>> _findNewSessions(JID toJid, List<XMLNode> children) async {
-    final ownJid = getAttributes().getFullJID().toBare();
-    final session = await getSessionManager();
-    final ownId = await session.getDeviceId();
-
-    // Ignore our own device if it is the only published device on our devices node
-    if (toJid.toBare() == ownJid) {
-      final deviceList = await getDeviceList(ownJid);
-      if (deviceList.isType<List<int>>()) {
-        final devices = deviceList.get<List<int>>();
-        if (devices.length == 1 && devices.first == ownId) {
-          return const Result(<OmemoBundle>[]);
-        }
-      }
-    }
-
-    final newSessions = List<OmemoBundle>.empty(growable: true);
-    final sessionAvailable = await _hasSessionWith(toJid.toString());   
-    if (!sessionAvailable) {
-      logger.finest('No session for $toJid. Retrieving bundles to build a new session.');
-      final result = await retrieveDeviceBundles(toJid);
-      if (result.isType<List<OmemoBundle>>()) {
-        final bundles = result.get<List<OmemoBundle>>();
-
-        if (ownJid == toJid) {
-          logger.finest('Requesting bundles for own JID. Ignoring current device');
-          newSessions.addAll(bundles.where((bundle) => bundle.id != ownId));
-        } else {
-          newSessions.addAll(bundles);
-        }
-      } else {
-        logger.warning('Failed to retrieve device bundles for $toJid');
-        return Result(OmemoNotSupportedForContactException());
-      }
-
-      if (!_subscriptionMap.containsKey(toJid)) {
-        await subscribeToDeviceList(toJid);
-      }
-    } else {
-      final toBare = toJid.toBare();
-      final ratchetSessions = (await session.getDeviceMap())[toBare.toString()]!;
-      final deviceMapRaw = await getDeviceList(toBare);
-      if (!_subscriptionMap.containsKey(toBare)) {
-        unawaited(subscribeToDeviceList(toBare));
-      }
-
-      if (deviceMapRaw.isType<OmemoError>()) {
-        logger.warning('Failed to get device list');
-        return Result(UnknownOmemoError());
-      }
-
-      final deviceList = deviceMapRaw.get<List<int>>();
-      for (final id in deviceList) {
-        // We already have a session with that device
-        if (ratchetSessions.contains(id)) continue;
-
-        // Ignore requests for our own device.
-        if (toJid == ownJid && id == ownId) {
-          logger.finest('Attempted to request bundle for our own device $id, which is the current device. Skipping request...');
-          continue;
-        }
-
-        logger.finest('Retrieving bundle for $toJid:$id');
-        final bundle = await retrieveDeviceBundle(toJid, id);
-        if (bundle.isType<OmemoBundle>()) {
-          newSessions.add(bundle.get<OmemoBundle>());
-        } else {
-          logger.warning('Failed to retrieve bundle for $toJid:$id');
-        }
-      }
-    }
-    
-    return Result(newSessions);
-  }
-
-  /// Sends an empty Omemo message to [toJid].
-  ///
-  /// If [findNewSessions] is true, then
-  /// new devices will be looked for first before sending the message. This means that
-  /// the new sessions will be included in the empty Omemo message. If false, then no
-  /// new sessions will be looked for before encrypting.
-  ///
-  /// [calledFromCriticalSection] MUST NOT be used from outside the manager. If true, then
-  /// sendEmptyMessage will not attempt to enter the critical section guarding the
-  /// encryption and decryption. If false, then the critical section will be entered before
-  /// encryption and left after sending the message.
-  Future<void> sendEmptyMessage(JID toJid, {
-    bool findNewSessions = false,
-    @protected
-    bool calledFromCriticalSection = false,
-  }) async {
-    if (!calledFromCriticalSection) {
-      final completer = await _handlerEntry(toJid);
-      if (completer != null) {
-        await completer.future;
-      }
-    }
-
-    var newSessions = <OmemoBundle>[];
-    if (findNewSessions) {
-      final result = await _findNewSessions(toJid, <XMLNode>[]);
-      if (!result.isType<OmemoError>()) newSessions = result.get<List<OmemoBundle>>();
-    }
-
-    final empty = await _encryptChildren(
-      null,
-      [toJid.toString()],
-      toJid.toString(),
-      newSessions,
-    );
-
     await getAttributes().sendStanza(
       Stanza.message(
-        to: toJid.toString(),
+        to: toJid,
         type: 'chat',
         children: [
-          empty,
+          _buildEncryptedElement(
+            result,
+            toJid,
+            await _getDeviceId(),
+          ),
 
           // Add a storage hint in case this is a message
           // Taken from the example at
@@ -447,13 +282,34 @@ abstract class OmemoManager extends XmppManagerBase {
       awaitable: false,
       encrypted: true,
     );
-
-    if (!calledFromCriticalSection) {
-      await _handlerExit(toJid);
-    }
   }
 
-  Future<StanzaHandlerData> _onOutgoingStanza(Stanza stanza, StanzaHandlerData state) async {
+  /// Send a heartbeat message to [jid].
+  Future<void> sendOmemoHeartbeat(String jid) async {
+    final om = await getOmemoManager();
+    await om.sendOmemoHeartbeat(jid);
+  }
+
+  /// For usage with omemo_dart's OmemoManager
+  Future<List<int>?> fetchDeviceList(String jid) async {
+    final result = await getDeviceList(JID.fromString(jid));
+    if (result.isType<OmemoError>()) return null;
+
+    return result.get<List<int>>();
+  }
+
+  /// For usage with omemo_dart's OmemoManager
+  Future<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>();
+  }
+
+  Future<StanzaHandlerData> _onOutgoingStanza(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
     if (state.encrypted) {
       logger.finest('Not encrypting since state.encrypted is true');
       return state;
@@ -461,43 +317,22 @@ abstract class OmemoManager extends XmppManagerBase {
 
     if (stanza.to == null) {
       // We cannot encrypt in this case.
+      logger.finest('Not encrypting since stanza.to is null');
       return state;
     }
 
     final toJid = JID.fromString(stanza.to!).toBare();
-    if (!(await shouldEncryptStanza(toJid, stanza))) {
+    final shouldEncryptResult = await shouldEncryptStanza(toJid, stanza);
-      logger.finest('shouldEncryptStanza returned false for message to $toJid. Not encrypting.');
+    if (!shouldEncryptResult && !state.forceEncryption) {
+      logger.finest(
+        'Not encrypting stanza for $toJid: Both shouldEncryptStanza and forceEncryption are false.',
+      );
       return state;
     } else {
-      logger.finest('shouldEncryptStanza returned true for message to $toJid.');
+      logger.finest(
-    }
+        'Encrypting stanza for $toJid: shouldEncryptResult=$shouldEncryptResult, forceEncryption=${state.forceEncryption}',
-    
-    final completer = await _handlerEntry(toJid);
-    if (completer != null) {
-      await completer.future;
-    }
-
-    final newSessions = List<OmemoBundle>.empty(growable: true);
-    // Try to find new sessions for [toJid].
-    final resultToJid = await _findNewSessions(toJid, stanza.children);
-    if (resultToJid.isType<List<OmemoBundle>>()) {
-      newSessions.addAll(resultToJid.get<List<OmemoBundle>>());
-    } else {
-      if (resultToJid.isType<OmemoNotSupportedForContactException>()) {
-        await _handlerExit(toJid);
-        return state.copyWith(
-          cancel: true,
-          cancelReason: resultToJid.get<OmemoNotSupportedForContactException>(),
       );
     }
-    }
-
-    // Try to find new sessions for our own Jid.
-    final ownJid = getAttributes().getFullJID().toBare();
-    final resultOwnJid = await _findNewSessions(ownJid, stanza.children);
-    if (resultOwnJid.isType<List<OmemoBundle>>()) {
-      newSessions.addAll(resultOwnJid.get<List<OmemoBundle>>());
-    }
 
     final toEncrypt = List<XMLNode>.empty(growable: true);
     final children = List<XMLNode>.empty(growable: true);
@@ -509,76 +344,63 @@ abstract class OmemoManager extends XmppManagerBase {
       }
     }
 
-    final jidsToEncryptFor = <String>[JID.fromString(stanza.to!).toBare().toString()];
+    logger.finest('Beginning encryption');
-    // Prevent encrypting to self if there is only one device (ours).
+    final carbonsEnabled = getAttributes()
-    if (await _hasSessionWith(ownJid.toString())) {
+            .getManagerById<CarbonsManager>(carbonsManager)
-      jidsToEncryptFor.add(ownJid.toString());
+            ?.isEnabled ??
-    }
+        false;
-
+    final om = await getOmemoManager();
-    try {
+    final result = await om.onOutgoingStanza(
-      logger.finest('Encrypting stanza');
+      OmemoOutgoingStanza(
-      final encrypted = await _encryptChildren(
+        [
-        toEncrypt,
+          toJid.toString(),
-        jidsToEncryptFor,
+          if (carbonsEnabled) getAttributes().getFullJID().toBare().toString(),
-        stanza.to!,
+        ],
-        newSessions,
+        _buildEnvelope(toEncrypt, toJid.toString()),
+      ),
     );
     logger.finest('Encryption done');
 
-      children.add(encrypted);
+    if (!result.isSuccess(2)) {
-
+      final other = Map<String, dynamic>.from(state.other);
-      // Only add EME when sending a message
+      other['encryption_error_jids'] = result.jidEncryptionErrors;
-      if (stanza.tag == 'message') {
+      other['encryption_error_devices'] = result.deviceEncryptionErrors;
-        children.add(buildEmeElement(ExplicitEncryptionType.omemo2));
+      return state.copyWith(
+        other: other,
+        // 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
+            ? OmemoNotSupportedForContactException()
+            : UnknownOmemoError(),
+        cancel: true,
+      );
     }
 
+    final encrypted = _buildEncryptedElement(
+      result,
+      toJid.toString(),
+      await _getDeviceId(),
+    );
+    children.add(encrypted);
+
+    // Only add message specific metadata when actually sending a message
+    if (stanza.tag == 'message') {
+      children
+        // Add EME data
+        ..add(buildEmeElement(ExplicitEncryptionType.omemo2))
         // 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.
-      if (stanza.tag == 'message') {
+        ..add(MessageProcessingHint.store.toXml());
-        children.add(MessageProcessingHint.store.toXml());
     }
 
-      await _handlerExit(toJid);
     return state.copyWith(
       stanza: state.stanza.copyWith(
         children: children,
       ),
       encrypted: true,
     );
-    } catch (ex) {
-      logger.severe('Encryption failed! $ex');
-      await _handlerExit(toJid);
-      return state.copyWith(
-        cancel: true,
-        cancelReason: EncryptionFailedException(),
-        other: {
-          ...state.other,
-          'encryption_error': ex,
-        },
-      );
-    }
-  }
-
-  /// This function returns true if the encryption scheme should ignore unacked ratchets
-  /// and don't try to build a new ratchet even though there are unacked ones.
-  /// The current logic is that chat states with no body ignore the "ack" state of the
-  /// ratchets.
-  ///
-  /// This function may be overriden. By default, the ack status of the ratchet is ignored
-  /// if we're sending a message containing chatstates or chat markers and the message does
-  /// not contain a <body /> element.
-  @visibleForOverriding
-  bool shouldIgnoreUnackedRatchets(List<XMLNode> children) {
-    return listContains(
-      children,
-      (XMLNode child) {
-        return child.attributes['xmlns'] == chatStateXmlns || child.attributes['xmlns'] == chatMarkersXmlns;
-      },
-    ) && !listContains(
-      children,
-      (XMLNode child) => child.tag == 'body',
-    );
   }
 
   /// This function is called whenever a message is to be encrypted. If it returns true,
@@ -587,48 +409,15 @@ abstract class OmemoManager extends XmppManagerBase {
   @visibleForOverriding
   Future<bool> shouldEncryptStanza(JID toJid, Stanza stanza);
 
-  /// Wrapper function that attempts to enter the encryption/decryption critical section.
+  Future<StanzaHandlerData> _onIncomingStanza(
-  /// In case the critical section could be entered, null is returned. If not, then a
+    Stanza stanza,
-  /// Completer is returned whose future will resolve once the critical section can be
+    StanzaHandlerData state,
-  /// entered.
+  ) async {
-  Future<Completer<void>?> _handlerEntry(JID fromJid) async {
-    return _handlerLock.synchronized(() {
-      if (_handlerFutures.containsKey(fromJid)) {
-        final c = Completer<void>();
-        _handlerFutures[fromJid]!.addLast(c);
-        return c;
-      }
-
-      _handlerFutures[fromJid] = Queue();
-      return null;
-    });
-  }
-
-  /// Wrapper function that exits the critical section.
-  Future<void> _handlerExit(JID fromJid) async {
-    await _handlerLock.synchronized(() {
-      if (_handlerFutures.containsKey(fromJid)) {
-        if (_handlerFutures[fromJid]!.isEmpty) {
-          _handlerFutures.remove(fromJid);
-          return;
-        }
-
-        _handlerFutures[fromJid]!.removeFirst().complete();
-      }
-    });
-  }
-  
-  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 fromJid = JID.fromString(stanza.from!).toBare();
-    final completer = await _handlerEntry(fromJid);
-    if (completer != null) {
-      await completer.future;
-    }
-    
     final header = encrypted.firstTag('header')!;
     final payloadElement = encrypted.firstTag('payload');
     final keys = List<EncryptedKey>.empty(growable: true);
@@ -649,56 +438,60 @@ abstract class OmemoManager extends XmppManagerBase {
     final ourJid = getAttributes().getFullJID();
     final sid = int.parse(header.attributes['sid']! as String);
 
-    // Ensure that if we receive a message from a device that we don't know about, we
+    final om = await getOmemoManager();
-    // ensure that _deviceMap is up-to-date.
+    final result = await om.onIncomingStanza(
-    final devices = _deviceMap[fromJid] ?? <int>[];
+      OmemoIncomingStanza(
-    if (!devices.contains(sid)) {
-      await getDeviceList(fromJid);
-    }
-
-    String? decrypted;
-    try {
-      decrypted = await _decryptMessage(
-        payloadElement != null ? base64.decode(payloadElement.innerText()) : null,
         fromJid.toString(),
         sid,
+        state.delayedDelivery?.timestamp.millisecondsSinceEpoch ??
+            DateTime.now().millisecondsSinceEpoch,
         keys,
-        state.delayedDelivery?.timestamp.millisecondsSinceEpoch ?? DateTime.now().millisecondsSinceEpoch,
+        payloadElement?.innerText(),
+      ),
     );
-    } catch (ex) {
-      logger.warning('Error occurred during message decryption: $ex');
 
-      await _handlerExit(fromJid);
+    final other = Map<String, dynamic>.from(state.other);
+    var children = stanza.children;
+    if (result.error != null) {
+      other['encryption_error'] = result.error;
+    } else {
+      children = stanza.children
+          .where(
+            (child) =>
+                child.tag != 'encrypted' ||
+                child.attributes['xmlns'] != omemoXmlns,
+          )
+          .toList();
+    }
+
+    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(
-        other: {
+          encrypted: true,
-          ...state.other,
+          other: other,
-          'encryption_error': ex,
-        },
         );
       }
 
-    final isAcked = await _isRatchetAcknowledged(fromJid.toString(), sid);
+      final envelopeChildren = envelope.firstTag('content')?.children;
-    if (!isAcked) {
+      if (envelopeChildren != null) {
-      // Unacked ratchet decrypted this message
+        children.addAll(
-      if (decrypted != null) {
+          // Do not add forbidden elements from the envelope
-        // The message is not empty, i.e. contains content
+          envelopeChildren.where(shouldEncryptElement),
-        logger.finest('Received non-empty OMEMO encrypted message for unacked ratchet. Acking with empty OMEMO message.');
+        );
+      } else {
+        logger.warning('Invalid envelope element: No <content /> element');
+      }
 
-        await _ackRatchet(fromJid.toString(), sid);
-        await sendEmptyMessage(fromJid, calledFromCriticalSection: true);
-
-        final envelope = XMLNode.fromString(decrypted);
-        final children = stanza.children.where(
-          (child) => child.tag != 'encrypted' || child.attributes['xmlns'] != omemoXmlns,
-        ).toList()
-          ..addAll(envelope.firstTag('content')!.children);
-
-        final other = Map<String, dynamic>.from(state.other);
       if (!checkAffixElements(envelope, stanza.from!, ourJid)) {
         other['encryption_error'] = InvalidAffixElementsException();
       }
+    }
 
-        await _handlerExit(fromJid);
     return state.copyWith(
       encrypted: true,
       stanza: Stanza(
@@ -712,94 +505,52 @@ abstract class OmemoManager extends XmppManagerBase {
       ),
       other: other,
     );
-      } else {
-        logger.info('Received empty OMEMO message for unacked ratchet. Marking $fromJid:$sid as acked');
-        await _ackRatchet(fromJid.toString(), sid);
-
-        final ownId = await (await getSessionManager()).getDeviceId();
-        final kex = keys.any((key) => key.kex && key.rid == ownId);
-        if (kex) {
-          logger.info('Empty OMEMO message contained a kex. Answering.');
-          await sendEmptyMessage(fromJid, calledFromCriticalSection: true);
-        }
-
-        await _handlerExit(fromJid);
-        return state;
-      }
-    } else {
-      // The ratchet that decrypted the message was acked
-      if (decrypted != null) {
-        final envelope = XMLNode.fromString(decrypted);
-
-        final children = stanza.children.where(
-          (child) => child.tag != 'encrypted' || child.attributes['xmlns'] != omemoXmlns,
-        ).toList()
-          ..addAll(envelope.firstTag('content')!.children);
-
-        final other = Map<String, dynamic>.from(state.other);
-        if (!checkAffixElements(envelope, stanza.from!, ourJid)) {
-          other['encryption_error'] = InvalidAffixElementsException();
-        }
-        
-        await _handlerExit(fromJid);
-        return state.copyWith(
-          encrypted: true,
-          stanza: Stanza(
-            to: stanza.to,
-            from: stanza.from,
-            id: stanza.id,
-            type: stanza.type,
-            children: children,
-            tag: stanza.tag,
-            attributes: Map<String, String>.from(stanza.attributes),
-          ),
-          other: other,
-        );
-      } else {
-        logger.info('Received empty OMEMO message on acked ratchet. Doing nothing');
-        await _handlerExit(fromJid);
-        return state;
-      }
-    }
   }
 
   /// Convenience function that attempts to retrieve the raw XML payload from the
   /// device list PubSub node.
   ///
   /// On success, returns the XML data. On failure, returns an OmemoError.
-  Future<Result<OmemoError, XMLNode>> _retrieveDeviceListPayload(JID jid) async {
+  Future<Result<OmemoError, XMLNode>> _retrieveDeviceListPayload(
+    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().toString(), omemoDevicesXmlns);
     if (result.isType<PubSubError>()) return Result(UnknownOmemoError());
     return Result(result.get<List<PubSubItem>>().first.payload);
   }
 
   /// Retrieves the OMEMO device list from [jid].
   Future<Result<OmemoError, List<int>>> getDeviceList(JID jid) async {
-    if (_deviceMap.containsKey(jid)) return Result(_deviceMap[jid]);
-
     final itemsRaw = await _retrieveDeviceListPayload(jid);
     if (itemsRaw.isType<OmemoError>()) return Result(UnknownOmemoError());
 
-    final ids = itemsRaw.get<XMLNode>().children
+    final ids = itemsRaw
+        .get<XMLNode>()
+        .children
         .map((child) => int.parse(child.attributes['id']! as String))
         .toList();
-    _deviceMap[jid] = ids;
     return Result(ids);
   }
 
   /// 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(JID jid) async {
+  Future<Result<OmemoError, List<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);
     if (bundlesRaw.isType<PubSubError>()) return Result(UnknownOmemoError());
 
-    final bundles = bundlesRaw.get<List<PubSubItem>>().map(
+    final bundles = bundlesRaw
+        .get<List<PubSubItem>>()
+        .map(
           (bundle) => bundleFromXML(jid, int.parse(bundle.id), bundle.payload),
-    ).toList();
+        )
+        .toList();
 
     return Result(bundles);
   }
@@ -807,7 +558,10 @@ abstract class OmemoManager 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(JID jid, int deviceId) async {
+  Future<Result<OmemoError, OmemoBundle>> retrieveDeviceBundle(
+    JID jid,
+    int deviceId,
+  ) async {
     final pm = getAttributes().getManagerById<PubSubManager>(pubsubManager)!;
     final bareJid = jid.toBare().toString();
     final item = await pm.getItem(bareJid, omemoBundlesXmlns, '$deviceId');
@@ -882,13 +636,9 @@ abstract class OmemoManager extends XmppManagerBase {
   }
 
   /// Subscribes to the device list PubSub node of [jid].
-  Future<void> subscribeToDeviceList(JID jid) async {
+  Future<void> subscribeToDeviceListImpl(String jid) async {
     final pm = getAttributes().getManagerById<PubSubManager>(pubsubManager)!;
-    final result = await pm.subscribe(jid.toString(), omemoDevicesXmlns);
+    await pm.subscribe(jid, omemoDevicesXmlns);
-
-    if (!result.isType<PubSubError>()) {
-      _subscriptionMap[jid] = true;
-    }
   }
 
   /// Attempts to find out if [jid] supports omemo:2.
@@ -902,7 +652,8 @@ abstract class OmemoManager extends XmppManagerBase {
     if (items.isType<DiscoError>()) return Result(UnknownOmemoError());
 
     final nodes = items.get<List<DiscoItem>>();
-    final result = nodes.any((item) => item.node == omemoDevicesXmlns) && nodes.any((item) => item.node == omemoBundlesXmlns);
+    final result = nodes.any((item) => item.node == omemoDevicesXmlns) &&
+        nodes.any((item) => item.node == omemoBundlesXmlns);
     return Result(result);
   }
 

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

@@ -8,8 +8,14 @@ import 'package:moxxmpp/src/stringxml.dart';
 import 'package:moxxmpp/src/xeps/staging/extensible_file_thumbnails.dart';
 
 class StatelessMediaSharingData {
-
+  const StatelessMediaSharingData({
-  const StatelessMediaSharingData({ required this.mediaType, required this.size, required this.description, required this.hashes, required this.url, required this.thumbnails });
+    required this.mediaType,
+    required this.size,
+    required this.description,
+    required this.hashes,
+    required this.url,
+    required this.thumbnails,
+  });
   final String mediaType;
   final int size;
   final String description;
@@ -30,7 +36,8 @@ StatelessMediaSharingData parseSIMSElement(XMLNode node) {
   }
 
   var url = '';
-  final references = file.firstTag('sources')!.findTags('reference', xmlns: referenceXmlns);
+  final references =
+      file.firstTag('sources')!.findTags('reference', xmlns: referenceXmlns);
   for (final i in references) {
     if (i.attributes['type'] != 'data') continue;
 
@@ -44,7 +51,8 @@ StatelessMediaSharingData parseSIMSElement(XMLNode node) {
   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) {
+    if (child.tag == 'file-thumbnail' &&
+        child.attributes['xmlns'] == fileThumbnailsXmlns) {
       final thumb = parseFileThumbnailElement(child);
       if (thumb != null) {
         thumbnails.add(thumb);
@@ -63,11 +71,7 @@ StatelessMediaSharingData parseSIMSElement(XMLNode node) {
 }
 
 class SIMSManager extends XmppManagerBase {
-  @override
+  SIMSManager() : super(simsManager);
-  String getName() => 'SIMSManager';
-
-  @override
-  String getId() => simsManager;
 
   @override
   List<String> getDiscoFeatures() => [simsXmlns];
@@ -87,7 +91,10 @@ class SIMSManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onMessage(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessage(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     final references = message.findTags('reference', xmlns: referenceXmlns);
     for (final ref in references) {
       final sims = ref.firstTag('media-sharing', xmlns: simsXmlns);

packages/moxxmpp/lib/src/xeps/xep_0414.dart

@@ -1,7 +1,6 @@
 import 'package:cryptography/cryptography.dart';
 
 class InvalidHashAlgorithmException implements Exception {
-
   InvalidHashAlgorithmException(this.name);
   final String name;
 
@@ -11,16 +10,20 @@ class InvalidHashAlgorithmException implements Exception {
 /// Returns the hash algorithm specified by its name, according to XEP-0414.
 HashAlgorithm? getHashByName(String name) {
   switch (name) {
-    case 'sha-1': return Sha1();
+    case 'sha-1':
-    case 'sha-256': return Sha256();
+      return Sha1();
-    case 'sha-512': return Sha512();
+    case 'sha-256':
+      return Sha256();
+    case 'sha-512':
+      return Sha512();
     // NOTE: cryptography provides an implementation of blake2b, however,
     //       I have no idea what it's output length is and you cannot set
     //       one. => New dependency
     // TODO(Unknown): Implement
     //case "blake2b-256": ;
     // hashLengthInBytes == 64 => 512?
-    case 'blake2b-512': Blake2b();
+    case 'blake2b-512':
+      Blake2b();
     // NOTE: cryptography does not provide SHA3 hashes => New dependency
     // TODO(Unknown): Implement
     //case "sha3-256": ;

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

@@ -12,11 +12,7 @@ class MessageRetractionData {
 }
 
 class MessageRetractionManager extends XmppManagerBase {
-  @override
+  MessageRetractionManager() : super(messageRetractionManager);
-  String getName() => 'MessageRetractionManager';
-
-  @override
-  String getId() => messageRetractionManager;
 
   @override
   List<String> getDiscoFeatures() => [messageRetractionXmlns];
@@ -34,7 +30,10 @@ class MessageRetractionManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onMessage(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessage(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     final applyTo = message.firstTag('apply-to', xmlns: fasteningXmlns);
     if (applyTo == null) {
       return state;
@@ -45,14 +44,13 @@ class MessageRetractionManager extends XmppManagerBase {
       return state;
     }
 
-    final isFallbackBody = message.firstTag('fallback', xmlns: fallbackIndicationXmlns) != null;
+    final isFallbackBody =
+        message.firstTag('fallback', xmlns: fallbackIndicationXmlns) != null;
 
     return state.copyWith(
       messageRetraction: MessageRetractionData(
         applyTo.attributes['id']! as String,
-        isFallbackBody ?
+        isFallbackBody ? message.firstTag('body')?.innerText() : null,
-          message.firstTag('body')?.innerText() :
-          null,
       ),
     );
   }

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

@@ -0,0 +1,68 @@
+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';
+
+class MessageReactions {
+  const MessageReactions(this.messageId, this.emojis);
+  final String messageId;
+  final List<String> emojis;
+
+  XMLNode toXml() {
+    return XMLNode.xmlns(
+      tag: 'reactions',
+      xmlns: messageReactionsXmlns,
+      attributes: <String, String>{
+        'id': messageId,
+      },
+      children: emojis.map((emoji) {
+        return XMLNode(
+          tag: 'reaction',
+          text: emoji,
+        );
+      }).toList(),
+    );
+  }
+}
+
+class MessageReactionsManager extends XmppManagerBase {
+  MessageReactionsManager() : super(messageReactionsManager);
+
+  @override
+  List<String> getDiscoFeatures() => [messageReactionsXmlns];
+
+  @override
+  List<StanzaHandler> getIncomingStanzaHandlers() => [
+        StanzaHandler(
+          stanzaTag: 'message',
+          tagName: 'reactions',
+          tagXmlns: messageReactionsXmlns,
+          callback: _onReactionsReceived,
+          // Before the message handler
+          priority: -99,
+        ),
+      ];
+
+  @override
+  Future<bool> isSupported() async => true;
+
+  Future<StanzaHandlerData> _onReactionsReceived(
+    Stanza message,
+    StanzaHandlerData state,
+  ) 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(),
+      ),
+    );
+  }
+}

packages/moxxmpp/lib/src/xeps/xep_0446.dart

@@ -4,7 +4,6 @@ import 'package:moxxmpp/src/xeps/staging/extensible_file_thumbnails.dart';
 import 'package:moxxmpp/src/xeps/xep_0300.dart';
 
 class FileMetadataData {
-
   const FileMetadataData({
     this.mediaType,
     this.width,
@@ -19,13 +18,18 @@ class FileMetadataData {
 
   /// Parse [node] as a FileMetadataData element.
   factory FileMetadataData.fromXML(XMLNode node) {
-    assert(node.attributes['xmlns'] == fileMetadataXmlns, 'Invalid element xmlns');
+    assert(
+      node.attributes['xmlns'] == fileMetadataXmlns,
+      'Invalid element xmlns',
+    );
     assert(node.tag == 'file', 'Invalid element anme');
 
     final lengthElement = node.firstTag('length');
-    final length = lengthElement != null ? int.parse(lengthElement.innerText()) : null;
+    final length =
+        lengthElement != null ? int.parse(lengthElement.innerText()) : null;
     final sizeElement = node.firstTag('size');
-    final size = sizeElement != null ? int.parse(sizeElement.innerText()) : null;
+    final size =
+        sizeElement != null ? int.parse(sizeElement.innerText()) : null;
 
     final hashes = <String, String>{};
     for (final e in node.findTags('hash')) {
@@ -83,13 +87,27 @@ class FileMetadataData {
       children: List.empty(growable: true),
     );
 
-    if (mediaType != null) node.addChild(XMLNode(tag: 'media-type', text: mediaType));
+    if (mediaType != null) {
-    if (width != null) node.addChild(XMLNode(tag: 'width', text: '$width'));
+      node.addChild(XMLNode(tag: 'media-type', text: mediaType));
-    if (height != null) node.addChild(XMLNode(tag: 'height', text: '$height'));
+    }
-    if (desc != null) node.addChild(XMLNode(tag: 'desc', text: desc));
+    if (width != null) {
-    if (length != null) node.addChild(XMLNode(tag: 'length', text: length.toString()));
+      node.addChild(XMLNode(tag: 'width', text: '$width'));
-    if (name != null) node.addChild(XMLNode(tag: 'name', text: name));
+    }
-    if (size != null) node.addChild(XMLNode(tag: 'size', text: size.toString()));
+    if (height != null) {
+      node.addChild(XMLNode(tag: 'height', text: '$height'));
+    }
+    if (desc != null) {
+      node.addChild(XMLNode(tag: 'desc', text: desc));
+    }
+    if (length != null) {
+      node.addChild(XMLNode(tag: 'length', text: length.toString()));
+    }
+    if (name != null) {
+      node.addChild(XMLNode(tag: 'name', text: name));
+    }
+    if (size != null) {
+      node.addChild(XMLNode(tag: 'size', text: size.toString()));
+    }
 
     for (final hash in hashes.entries) {
       node.addChild(

packages/moxxmpp/lib/src/xeps/xep_0447.dart

@@ -18,13 +18,17 @@ abstract class StatelessFileSharingSource {
 
 /// Implementation for url-data source elements.
 class StatelessFileSharingUrlSource extends StatelessFileSharingSource {
-
   StatelessFileSharingUrlSource(this.url);
 
   factory StatelessFileSharingUrlSource.fromXml(XMLNode element) {
-    assert(element.attributes['xmlns'] == urlDataXmlns, 'Element has the wrong xmlns');
+    assert(
+      element.attributes['xmlns'] == urlDataXmlns,
+      'Element has the wrong xmlns',
+    );
 
-    return StatelessFileSharingUrlSource(element.attributes['target']! as String);
+    return StatelessFileSharingUrlSource(
+      element.attributes['target']! as String,
+    );
   }
 
   final String url;
@@ -41,18 +45,20 @@ class StatelessFileSharingUrlSource extends StatelessFileSharingSource {
   }
 }
 
-class StatelessFileSharingData {
+/// Finds the <sources/> element in [node] and returns the list of
-
+/// StatelessFileSharingSources contained with it.
-  const StatelessFileSharingData(this.metadata, this.sources);
+/// If [checkXmlns] is true, then the sources element must also have an xmlns attribute
-
+/// of "urn:xmpp:sfs:0".
-  /// Parse [node] as a StatelessFileSharingData element.
+List<StatelessFileSharingSource> processStatelessFileSharingSources(
-  factory StatelessFileSharingData.fromXML(XMLNode node) {
+  XMLNode node, {
-    assert(node.attributes['xmlns'] == sfsXmlns, 'Invalid element xmlns');
+  bool checkXmlns = true,
-    assert(node.tag == 'file-sharing', 'Invalid element name');
+}) {
-
   final sources = List<StatelessFileSharingSource>.empty(growable: true);
 
-    final sourcesElement = node.firstTag('sources')!;
+  final sourcesElement = node.firstTag(
+    'sources',
+    xmlns: checkXmlns ? sfsXmlns : null,
+  )!;
   for (final source in sourcesElement.children) {
     if (source.attributes['xmlns'] == urlDataXmlns) {
       sources.add(StatelessFileSharingUrlSource.fromXml(source));
@@ -61,9 +67,21 @@ class StatelessFileSharingData {
     }
   }
 
+  return sources;
+}
+
+class StatelessFileSharingData {
+  const StatelessFileSharingData(this.metadata, this.sources);
+
+  /// Parse [node] as a StatelessFileSharingData element.
+  factory StatelessFileSharingData.fromXML(XMLNode node) {
+    assert(node.attributes['xmlns'] == sfsXmlns, 'Invalid element xmlns');
+    assert(node.tag == 'file-sharing', 'Invalid element name');
+
     return StatelessFileSharingData(
       FileMetadataData.fromXML(node.firstTag('file')!),
-      sources,
+      // TODO(PapaTutuWawa): This is a work around for Stickers where the source element has a XMLNS but SFS does not have one.
+      processStatelessFileSharingSources(node, checkXmlns: false),
     );
   }
 
@@ -78,9 +96,7 @@ class StatelessFileSharingData {
         metadata.toXML(),
         XMLNode(
           tag: 'sources',
-          children: sources
+          children: sources.map((source) => source.toXml()).toList(),
-            .map((source) => source.toXml())
-            .toList(),
         ),
       ],
     );
@@ -89,17 +105,14 @@ class StatelessFileSharingData {
   StatelessFileSharingUrlSource? getFirstUrlSource() {
     return firstWhereOrNull(
       sources,
-      (StatelessFileSharingSource source) => source is StatelessFileSharingUrlSource,
+      (StatelessFileSharingSource source) =>
+          source is StatelessFileSharingUrlSource,
     ) as StatelessFileSharingUrlSource?;
   }
 }
 
 class SFSManager extends XmppManagerBase {
-  @override
+  SFSManager() : super(sfsManager);
-  String getName() => 'SFSManager';
-
-  @override
-  String getId() => sfsManager;
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -116,11 +129,16 @@ class SFSManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onMessage(Stanza message, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessage(
+    Stanza message,
+    StanzaHandlerData state,
+  ) async {
     final sfs = message.firstTag('file-sharing', xmlns: sfsXmlns)!;
 
     return state.copyWith(
-      sfs: StatelessFileSharingData.fromXML(sfs),
+      sfs: StatelessFileSharingData.fromXML(
+        sfs,
+      ),
     );
   }
 }

packages/moxxmpp/lib/src/xeps/xep_0448.dart

@@ -38,10 +38,18 @@ SFSEncryptionType encryptionTypeFromNamespace(String xmlns) {
 }
 
 class StatelessFileSharingEncryptedSource extends StatelessFileSharingSource {
-
+  StatelessFileSharingEncryptedSource(
-  StatelessFileSharingEncryptedSource(this.encryption, this.key, this.iv, this.hashes, this.source);
+    this.encryption,
+    this.key,
+    this.iv,
+    this.hashes,
+    this.source,
+  );
   factory StatelessFileSharingEncryptedSource.fromXml(XMLNode element) {
-    assert(element.attributes['xmlns'] == sfsEncryptionXmlns, 'Element has invalid xmlns');
+    assert(
+      element.attributes['xmlns'] == sfsEncryptionXmlns,
+      'Element has invalid xmlns',
+    );
 
     final key = base64Decode(element.firstTag('key')!.text!);
     final iv = base64Decode(element.firstTag('iv')!.text!);
@@ -50,7 +58,8 @@ class StatelessFileSharingEncryptedSource extends StatelessFileSharingSource {
     // Find the first URL source
     final source = firstWhereOrNull(
       sources,
-      (XMLNode child) => child.tag == 'url-data' && child.attributes['xmlns'] == urlDataXmlns,
+      (XMLNode child) =>
+          child.tag == 'url-data' && child.attributes['xmlns'] == urlDataXmlns,
     )!;
 
     // Find hashes
@@ -91,7 +100,8 @@ class StatelessFileSharingEncryptedSource extends StatelessFileSharingSource {
           tag: 'iv',
           text: base64Encode(iv),
         ),
-        ...hashes.entries.map((hash) => constructHashElement(hash.key, hash.value)),
+        ...hashes.entries
+            .map((hash) => constructHashElement(hash.key, hash.value)),
         XMLNode.xmlns(
           tag: 'sources',
           xmlns: sfsXmlns,

packages/moxxmpp/lib/src/xeps/xep_0449.dart

@@ -0,0 +1,322 @@
+import 'dart:convert';
+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/rfcs/rfc_4790.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_0060/errors.dart';
+import 'package:moxxmpp/src/xeps/xep_0060/xep_0060.dart';
+import 'package:moxxmpp/src/xeps/xep_0300.dart';
+import 'package:moxxmpp/src/xeps/xep_0446.dart';
+import 'package:moxxmpp/src/xeps/xep_0447.dart';
+
+class Sticker {
+  const Sticker(this.metadata, this.sources, this.suggests);
+
+  factory Sticker.fromXML(XMLNode node) {
+    assert(node.tag == 'item', 'sticker has wrong tag');
+
+    return Sticker(
+      FileMetadataData.fromXML(
+        node.firstTag('file', xmlns: fileMetadataXmlns)!,
+      ),
+      processStatelessFileSharingSources(node, checkXmlns: false),
+      {},
+    );
+  }
+
+  final FileMetadataData metadata;
+  final List<StatelessFileSharingSource> sources;
+  // Language -> suggestion
+  final Map<String, String> suggests;
+
+  XMLNode toPubSubXML() {
+    final suggestsElements = suggests.keys.map((suggest) {
+      Map<String, String> attrs;
+      if (suggest.isEmpty) {
+        attrs = {};
+      } else {
+        attrs = {
+          'xml:lang': suggest,
+        };
+      }
+
+      return XMLNode(
+        tag: 'suggest',
+        attributes: attrs,
+        text: suggests[suggest],
+      );
+    });
+
+    return XMLNode(
+      tag: 'item',
+      children: [
+        metadata.toXML(),
+        ...sources.map((source) => source.toXml()),
+        ...suggestsElements,
+      ],
+    );
+  }
+}
+
+class StickerPack {
+  const StickerPack(
+    this.id,
+    this.name,
+    this.summary,
+    this.hashAlgorithm,
+    this.hashValue,
+    this.stickers,
+    this.restricted,
+  );
+
+  factory StickerPack.fromXML(
+    String id,
+    XMLNode node, {
+    bool hashAvailable = true,
+  }) {
+    assert(node.tag == 'pack', 'node has wrong tag');
+    assert(node.attributes['xmlns'] == stickersXmlns, 'node has wrong XMLNS');
+
+    var hashAlgorithm = HashFunction.sha256;
+    var hashValue = '';
+    if (hashAvailable) {
+      final hash = node.firstTag('hash', xmlns: hashXmlns)!;
+      hashAlgorithm = hashFunctionFromName(hash.attributes['algo']! as String);
+      hashValue = hash.innerText();
+    }
+
+    return StickerPack(
+      id,
+      node.firstTag('name')!.innerText(),
+      node.firstTag('summary')!.innerText(),
+      hashAlgorithm,
+      hashValue,
+      node.children
+          .where((e) => e.tag == 'item')
+          .map<Sticker>(Sticker.fromXML)
+          .toList(),
+      node.firstTag('restricted') != null,
+    );
+  }
+
+  final String id;
+  // TODO(PapaTutuWawa): Turn name and summary into a Map as it may contain a xml:lang
+  final String name;
+  final String summary;
+  final HashFunction hashAlgorithm;
+  final String hashValue;
+  final List<Sticker> stickers;
+  final bool restricted;
+
+  /// When using the fromXML factory to parse a description of a sticker pack with a
+  /// yet unknown hash, then this function can be used in order to apply the freshly
+  /// calculated hash to the object.
+  StickerPack copyWithId(HashFunction newHashFunction, String newId) {
+    return StickerPack(
+      newId,
+      name,
+      summary,
+      newHashFunction,
+      newId,
+      stickers,
+      restricted,
+    );
+  }
+
+  XMLNode toXML() {
+    return XMLNode.xmlns(
+      tag: 'pack',
+      xmlns: stickersXmlns,
+      children: [
+        // Pack metadata
+        XMLNode(
+          tag: 'name',
+          text: name,
+        ),
+        XMLNode(
+          tag: 'summary',
+          text: summary,
+        ),
+        constructHashElement(
+          hashAlgorithm.toName(),
+          hashValue,
+        ),
+
+        ...restricted ? [XMLNode(tag: 'restricted')] : [],
+
+        // Stickers
+        ...stickers.map((sticker) => sticker.toPubSubXML()),
+      ],
+    );
+  }
+
+  /// Calculates the sticker pack's hash as specified by XEP-0449.
+  Future<String> getHash(HashFunction hashFunction) async {
+    // Build the meta string
+    final metaTmp = [
+      <int>[
+        ...utf8.encode('name'),
+        0x1f,
+        0x1f,
+        ...utf8.encode(name),
+        0x1f,
+        0x1e,
+      ],
+      <int>[
+        ...utf8.encode('summary'),
+        0x1f,
+        0x1f,
+        ...utf8.encode(summary),
+        0x1f,
+        0x1e,
+      ],
+    ]..sort(ioctetSortComparatorRaw);
+    final metaString = List<int>.empty(growable: true);
+    for (final m in metaTmp) {
+      metaString.addAll(m);
+    }
+    metaString.add(0x1c);
+
+    // Build item hashes
+    final items = List<List<int>>.empty(growable: true);
+    for (final sticker in stickers) {
+      final tmp = List<int>.empty(growable: true)
+        ..addAll(utf8.encode(sticker.metadata.desc!))
+        ..add(0x1e);
+
+      final hashes = List<List<int>>.empty(growable: true);
+      for (final hash in sticker.metadata.hashes.keys) {
+        hashes.add([
+          ...utf8.encode(hash),
+          0x1f,
+          ...utf8.encode(sticker.metadata.hashes[hash]!),
+          0x1f,
+          0x1e,
+        ]);
+      }
+      hashes.sort(ioctetSortComparatorRaw);
+
+      for (final hash in hashes) {
+        tmp.addAll(hash);
+      }
+      tmp.add(0x1d);
+      items.add(tmp);
+    }
+    items.sort(ioctetSortComparatorRaw);
+    final stickersString = List<int>.empty(growable: true);
+    for (final item in items) {
+      stickersString.addAll(item);
+    }
+    stickersString.add(0x1c);
+
+    // Calculate the hash
+    final rawHash = await CryptographicHashManager.hashFromData(
+      [
+        ...metaString,
+        ...stickersString,
+      ],
+      hashFunction,
+    );
+    return base64.encode(rawHash).substring(0, 24);
+  }
+}
+
+class StickersManager extends XmppManagerBase {
+  StickersManager() : super(stickersManager);
+
+  @override
+  Future<bool> isSupported() async => true;
+
+  @override
+  List<StanzaHandler> getIncomingStanzaHandlers() => [
+        StanzaHandler(
+          stanzaTag: 'message',
+          tagXmlns: stickersXmlns,
+          tagName: 'sticker',
+          callback: _onIncomingMessage,
+          priority: -99,
+        ),
+      ];
+
+  Future<StanzaHandlerData> _onIncomingMessage(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
+    final sticker = stanza.firstTag('sticker', xmlns: stickersXmlns)!;
+    return state.copyWith(
+      stickerPackId: sticker.attributes['pack']! as String,
+    );
+  }
+
+  /// Publishes the StickerPack [pack] to the PubSub node of [jid]. If specified, then
+  /// [accessModel] will be used as the PubSub node's access model.
+  ///
+  /// On success, returns true. On failure, returns a PubSubError.
+  Future<Result<PubSubError, bool>> publishStickerPack(
+    JID jid,
+    StickerPack pack, {
+    String? accessModel,
+  }) async {
+    assert(pack.id != '', 'The sticker pack must have an id');
+    final pm = getAttributes().getManagerById<PubSubManager>(pubsubManager)!;
+
+    return pm.publish(
+      jid.toBare().toString(),
+      stickersXmlns,
+      pack.toXML(),
+      id: pack.id,
+      options: PubSubPublishOptions(
+        maxItems: 'max',
+        accessModel: accessModel,
+      ),
+    );
+  }
+
+  /// Removes the sticker pack with id [id] from the PubSub node of [jid].
+  ///
+  /// On success, returns the true. On failure, returns a PubSubError.
+  Future<Result<PubSubError, bool>> retractStickerPack(
+    JID jid,
+    String id,
+  ) async {
+    final pm = getAttributes().getManagerById<PubSubManager>(pubsubManager)!;
+
+    return pm.retract(
+      jid,
+      stickersXmlns,
+      id,
+    );
+  }
+
+  /// Fetches the sticker pack with id [id] from [jid].
+  ///
+  /// On success, returns the StickerPack. On failure, returns a PubSubError.
+  Future<Result<PubSubError, StickerPack>> fetchStickerPack(
+    JID jid,
+    String id,
+  ) async {
+    final pm = getAttributes().getManagerById<PubSubManager>(pubsubManager)!;
+    final stickerPackDataRaw = await pm.getItem(
+      jid.toBare().toString(),
+      stickersXmlns,
+      id,
+    );
+    if (stickerPackDataRaw.isType<PubSubError>()) {
+      return Result(stickerPackDataRaw.get<PubSubError>());
+    }
+
+    final stickerPackData = stickerPackDataRaw.get<PubSubItem>();
+    final stickerPack = StickerPack.fromXML(
+      stickerPackData.id,
+      stickerPackData.payload,
+    );
+
+    return Result(stickerPack);
+  }
+}

packages/moxxmpp/lib/src/xeps/xep_0461.dart

@@ -1,3 +1,4 @@
+import 'package:meta/meta.dart';
 import 'package:moxxmpp/src/managers/base.dart';
 import 'package:moxxmpp/src/managers/data.dart';
 import 'package:moxxmpp/src/managers/handlers.dart';
@@ -5,26 +6,69 @@ import 'package:moxxmpp/src/managers/namespaces.dart';
 import 'package:moxxmpp/src/namespaces.dart';
 import 'package:moxxmpp/src/stanza.dart';
 
+/// Data summarizing the XEP-0461 data.
 class ReplyData {
-
   const ReplyData({
-      required this.to,
     required this.id,
+    this.to,
     this.start,
     this.end,
   });
-  final String to;
+
+  /// The bare JID to whom the reply applies to
+  final String? to;
+
+  /// The stanza ID of the message that is replied to
   final String id;
+
+  /// The start of the fallback body (inclusive)
   final int? start;
+
+  /// The end of the fallback body (exclusive)
   final int? end;
+
+  /// Applies the metadata to the received body [body] in order to remove the fallback.
+  /// If either [ReplyData.start] or [ReplyData.end] are null, then body is returned as
+  /// is.
+  String removeFallback(String body) {
+    if (start == null || end == null) return body;
+
+    return body.replaceRange(start!, end, '');
+  }
 }
 
+/// Internal class describing how to build a message with a quote fallback body.
+@visibleForTesting
+class QuoteData {
+  const QuoteData(this.body, this.fallbackLength);
+
+  /// Takes the body of the message we want to quote [quoteBody] and the content of
+  /// the reply [body] and computes the fallback body and its length.
+  factory QuoteData.fromBodies(String quoteBody, String body) {
+    final fallback = quoteBody.split('\n').map((line) => '> $line\n').join();
+
+    return QuoteData(
+      '$fallback$body',
+      fallback.length,
+    );
+  }
+
+  /// The new body with fallback data at the beginning
+  final String body;
+
+  /// The length of the fallback data
+  final int fallbackLength;
+}
+
+/// A manager implementing support for parsing XEP-0461 metadata. The
+/// MessageRepliesManager itself does not modify the body of the message.
 class MessageRepliesManager extends XmppManagerBase {
-  @override
+  MessageRepliesManager() : super(messageRepliesManager);
-  String getName() => 'MessageRepliesManager';
 
   @override
-  String getId() => messageRepliesManager;
+  List<String> getDiscoFeatures() => [
+        replyXmlns,
+      ];
 
   @override
   List<StanzaHandler> getIncomingStanzaHandlers() => [
@@ -41,10 +85,13 @@ class MessageRepliesManager extends XmppManagerBase {
   @override
   Future<bool> isSupported() async => true;
 
-  Future<StanzaHandlerData> _onMessage(Stanza stanza, StanzaHandlerData state) async {
+  Future<StanzaHandlerData> _onMessage(
+    Stanza stanza,
+    StanzaHandlerData state,
+  ) async {
     final reply = stanza.firstTag('reply', xmlns: replyXmlns)!;
     final id = reply.attributes['id']! as String;
-    final to = reply.attributes['to']! as String;
+    final to = reply.attributes['to'] as String?;
     int? start;
     int? end;
 
@@ -56,11 +103,13 @@ class MessageRepliesManager extends XmppManagerBase {
       end = int.parse(body.attributes['end']! as String);
     }
 
-    return state.copyWith(reply: ReplyData(
+    return state.copyWith(
+      reply: ReplyData(
         id: id,
         to: to,
         start: start,
         end: end,
-    ),);
+      ),
+    );
   }
 }

packages/moxxmpp/moxxmpp.doap

@@ -0,0 +1,276 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'
+         xmlns='http://usefulinc.com/ns/doap#'
+	 xmlns:foaf='http://xmlns.com/foaf/0.1/'
+	 xmlns:xmpp='https://linkmauve.fr/ns/xmpp-doap#'>
+  <Project xml:lang='en'>
+    <name>moxxmpp</name>
+    <created>2021-12-26</created>
+    <homepage rdf:resource='https://codeberg.org/moxxy/moxxmpp'/>
+    <os>Linux</os>
+    <os>Windows</os>
+    <os>macOS</os>
+    <os>Android</os>
+    <os>iOS</os>
+
+    <programming-language>Dart</programming-language>
+
+    <maintainer>
+      <foaf:Person>
+	<foaf:name>Alexander "Polynomdivision"</foaf:name>
+	<foaf:homepage rdf:resource="https://blog.polynom.me" />
+      </foaf:Person>
+    </maintainer>
+
+    <implements rdf:resource="https://xmpp.org/rfcs/rfc6120.html" />
+
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0004.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>2.13.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0030.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>2.5rc3</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0054.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>1.2</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0060.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>1.24.1</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0066.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:note xml:lang="en">Only jabber:x:oob</xmpp:note>
+	<xmpp:version>1.5</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0084.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:note xml:lang="en">Receiving data</xmpp:note>
+	<xmpp:version>1.1.4</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0085.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>2.1</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0115.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>1.5.2</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0153.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>1.1</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0184.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>1.4.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0191.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>1.3.0</xmpp:version>
+	<xmpp:note xml:lang="en">Not plugged into the UI</xmpp:note>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0198.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>1.6</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0280.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>1.0.1</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0297.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:note xml:lang="en">Exists only as part of support for XEP-0280</xmpp:note>
+	<xmpp:version>1.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0300.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:note xml:lang="en">Supports only Sha256, Sha512 and blake2b512</xmpp:note>
+	<xmpp:version>1.0.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0308.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>1.2.1</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0333.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:note xml:lang="en">Read-only support</xmpp:note>
+	<xmpp:version>0.4</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0334.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:note xml:lang="en">Write-only support</xmpp:note>
+	<xmpp:version>0.3.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0352.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>1.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0359.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>0.6.1</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0363.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>1.1.0</xmpp:version>
+	<xmpp:note xml:lang="en">Only handles the success case; not accessible via the App</xmpp:note>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0368.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>1.1.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0380.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>0.4.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0384.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>0.8.3</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0420.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>0.4.1</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0424.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>0.3.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0444.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>0.1.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0446.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>0.2.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0447.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>0.1.2</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0448.html" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>0.2.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0449.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>0.1.1</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0461.html" />
+	<xmpp:status>complete</xmpp:status>
+	<xmpp:version>0.2.0</xmpp:version>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://codeberg.org/moxxy/custom-xeps/src/branch/master/xep-xxxx-extensible-file-thumbnails.md" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>0.2.1</xmpp:version>
+	<xmpp:note xml:lang="en">Only Blurhash is implemented</xmpp:note>
+      </xmpp:SupportedXep>
+    </implements>
+    <implements>
+      <xmpp:SupportedXep>
+	<xmpp:xep rdf:resource="https://codeberg.org/moxxy/custom-xeps/src/branch/master/xep-xxxx-file-upload-notification.md" />
+	<xmpp:status>partial</xmpp:status>
+	<xmpp:version>0.0.5</xmpp:version>
+	<xmpp:note xml:lang="en">Sending and receiving implemented; cancellation not implemented</xmpp:note>
+      </xmpp:SupportedXep>
+    </implements>
+  </Project>
+</rdf:RDF>

packages/moxxmpp/pub2nix.lock

@@ -0,0 +1,653 @@
+packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 50.0.0
+    sha256: 1hyd5pmjcfyvfwhsc0wq6k0229abmqq5zn95g31hh42bklb2gci5
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 5.2.0
+    sha256: 0niy5b3w39aywpjpw5a84pxdilhh3zzv1c22x8ywml756pybmj4r
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.3.1
+    sha256: 0c78zkzg2d2kzw1qrpiyrj1qvm4pr0yhnzapbqk347m780ha408g
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.10.0
+    sha256: 00hhylamsjcqmcbxlsrfimri63gb384l31r9mqvacn6c6bvk4yfx
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.1
+    sha256: 0hxq8072hb89q9s91xlz9fvrjxfy7hw6jkdwkph5dp77df841kmj
+  build:
+    dependency: transitive
+    description:
+      name: build
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.3.1
+    sha256: 1x6nkii6kqy6y7ck0151yfhc9lp2nvbhznnhdi2mxr8afk6jxigd
+  build_config:
+    dependency: transitive
+    description:
+      name: build_config
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.1.1
+    sha256: 092rrbhbdy9fk50jqb1fwj1sfk415fi43irvsd0hk5w90gn8vazj
+  build_daemon:
+    dependency: transitive
+    description:
+      name: build_daemon
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.1.0
+    sha256: 0b6hnwjc3gi5g7cnpy8xyiqigcrs0xp51c7y7v1pqn9v75g25w6j
+  build_resolvers:
+    dependency: transitive
+    description:
+      name: build_resolvers
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.0
+    sha256: 0fnrisgq6rnvbqsf8v43hb11kr1qq6azrxbsvx3wwimd37nxx8m5
+  build_runner:
+    dependency: direct dev
+    description:
+      name: build_runner
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.3.2
+    sha256: 0246bxl9rxgil55fhfzi7csd9a56blj9s1j1z79717hiyzsr60x6
+  build_runner_core:
+    dependency: transitive
+    description:
+      name: build_runner_core
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 7.2.7
+    sha256: 0bpil0fw0dag3vbnin9p945ymi7xjgkiy7jrq9j52plljf7cnf5z
+  built_collection:
+    dependency: transitive
+    description:
+      name: built_collection
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 5.1.1
+    sha256: 0bqjahxr42q84w91nhv3n4cr580l3s3ffx3vgzyyypgqnrck0hv3
+  built_value:
+    dependency: transitive
+    description:
+      name: built_value
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 8.4.2
+    sha256: 0sslr4258snvcj8qhbdk6wapka174als0viyxddwqlnhs7dlci8i
+  checked_yaml:
+    dependency: transitive
+    description:
+      name: checked_yaml
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.0.1
+    sha256: 1gf7ankc5jb7mk17br87ajv05pfg6vb8nf35ay6c35w8jp70ra7k
+  code_builder:
+    dependency: transitive
+    description:
+      name: code_builder
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 4.3.0
+    sha256: 1vl9dl23yd0zjw52ndrazijs6dw83fg1rvyb2gfdpd6n1lj9nbhg
+  collection:
+    dependency: direct main
+    description:
+      name: collection
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.17.0
+    sha256: 1iyl3v3j7mj3sxjf63b1kc182fwrwd04mjp5x2i61hic8ihfw545
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.1.1
+    sha256: 0adsigjk3l1c31i6k91p28dqyjlgwiqrs4lky5djrm2scf8k6cri
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.6.1
+    sha256: 0akbg1yp2h4vprc8r9xvrpgvp5d26h7m80h5sbzgr5dlis1bcw0d
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.0.2
+    sha256: 1kjfb8fvdxazmv9ps2iqdhb8kcr31115h0nwn6v4xmr71k8jb8ds
+  cryptography:
+    dependency: direct main
+    description:
+      name: cryptography
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.0.5
+    sha256: 0jqph45d9lbhdakprnb84c3qhk4aq05hhb1pmn8w23yhl41ypijs
+  dart_style:
+    dependency: transitive
+    description:
+      name: dart_style
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.2.4
+    sha256: 01wg15kalbjlh4i3xbawc9zk8yrk28qhak7xp7mlwn2syhdckn7v
+  file:
+    dependency: transitive
+    description:
+      name: file
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 6.1.4
+    sha256: 0ajcfblf8d4dicp1sgzkbrhd0b0v0d8wl70jsnf5drjck3p3ppk7
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.0.1
+    sha256: 1m8cdfqp9d6w1cik3fwz9bai1wf9j11rjv2z0zlv7ich87q9kkjk
+  freezed:
+    dependency: direct main
+    description:
+      name: freezed
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.1
+    sha256: 1i9s4djf4vlz56zqn8brcck3n7sk07qay23wmaan991cqydd10iq
+  freezed_annotation:
+    dependency: direct main
+    description:
+      name: freezed_annotation
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.0
+    sha256: 0ym120dh1lpfnb68gxh1finm8p9l445q5x10aw8269y469b9k9z3
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.1.0
+    sha256: 0nv4avkv2if9hdcfzckz36f3mclv7vxchivrg8j3miaqhnjvv4bj
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.0
+    sha256: 0a6gbwsbz6rkg35dkff0zv88rvcflqdmda90hdfpn7jp1z1w9rhs
+  graphs:
+    dependency: transitive
+    description:
+      name: graphs
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.2.0
+    sha256: 0cr6dgs1a7ln2ir5gd0kiwpn787lk4dwhqfjv8876hkkr1rv80m9
+  hex:
+    dependency: direct main
+    description:
+      name: hex
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 0.2.0
+    sha256: 19w3f90mdiy06a6kf8hlwc4jn4cxixkj106kc3g3bis27ar7smkh
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.2.1
+    sha256: 1zdcm04z85jahb2hs7qs85rh974kw49hffhy9cn1gfda3077dvql
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 4.0.2
+    sha256: 027c4sjkhkkx3sk1aqs6s4djb87syi9h521qpm1bf21bq3gga5jd
+  io:
+    dependency: transitive
+    description:
+      name: io
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.0.3
+    sha256: 1bp5l8hkrp6fjj7zw9af51hxyp52sjspc5558lq0lmi453l0czni
+  js:
+    dependency: transitive
+    description:
+      name: js
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 0.6.5
+    sha256: 13fbxgyg1v6bmzvxamg6494vk3923fn3mgxj6f4y476aqwk99n50
+  json_annotation:
+    dependency: transitive
+    description:
+      name: json_annotation
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 4.7.0
+    sha256: 1p9nvn33psx2zbalhyqjw8gr4agd76jj5jq0fdz0i584c7l77bby
+  json_serializable:
+    dependency: direct main
+    description:
+      name: json_serializable
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 6.5.4
+    sha256: 04d7laaxrbiybcgbv3y223hy8d6n9f84h5lv9sv79zd9ffzkb2hg
+  logging:
+    dependency: direct main
+    description:
+      name: logging
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.0.2
+    sha256: 0hl1mjh662c44ci7z60x92i0jsyqg1zm6k6fc89n9pdcxsqdpwfs
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 0.12.13
+    sha256: 0pjgc38clnjbv124n8bh724db1wcc4kk125j7dxl0icz7clvm0p0
+  meta:
+    dependency: direct main
+    description:
+      name: meta
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.8.0
+    sha256: 01kqdd25nln5a219pr94s66p27m0kpqz0wpmwnm24kdy3ngif1v5
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.0.2
+    sha256: 1dr3qikzvp10q1saka7azki5gk2kkf2v7k9wfqjsyxmza2zlv896
+  moxlib:
+    dependency: direct main
+    description:
+      name: moxlib
+      url: https://git.polynom.me/api/packages/Moxxy/pub/
+    archive_url: https://git.polynom.me/moxxy/-/packages/pub/moxlib/0.1.5/files/57
+    source: hosted
+    version: 0.1.5
+    sha256: 1j52xglpwy8c7dbylc3f6vrh0p52xhhwqs4h0qcqk8c1rvjn5czq
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.0.1
+    sha256: 0i0gfc2yqa09182vc01lj47qpq98kfm9m8h4n8c5fby0mjd0lvyx
+  omemo_dart:
+    dependency: direct main
+    description:
+      name: omemo_dart
+      url: https://git.polynom.me/api/packages/PapaTutuWawa/pub/
+    archive_url: https://git.polynom.me/PapaTutuWawa/-/packages/pub/omemo_dart/0.4.3/files/92
+    source: hosted
+    version: 0.4.3
+    sha256: 09x3jqa11hjdjp31nxnz91j6jssbc2f8a1lh44fmkc0d79hs8bbi
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.0
+    sha256: 1d4l0i4cby344zj45f5shrg2pkw1i1jn03kx0qqh0l7gh1ha7bpc
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.8.2
+    sha256: 16ggdh29ciy7h8sdshhwmxn6dd12sfbykf2j82c56iwhhlljq181
+  pedantic:
+    dependency: transitive
+    description:
+      name: pedantic
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.11.1
+    sha256: 10ch0h3hi6cfwiz2ihfkh6m36m75c0m7fd0wwqaqggffsj2dn8ad
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 5.1.0
+    sha256: 1pqqqqiy9ald24qsi24q9qrr0zphgpsrnrv9rlx4vwr6xak7d8c0
+  pinenacl:
+    dependency: transitive
+    description:
+      name: pinenacl
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 0.5.1
+    sha256: 0didjgva658z90hbcmhd0y8w1b8v86dp6gabfhylnw1aixl47cxg
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.5.1
+    sha256: 0wmzs46hjszv3ayhr1p5l7xza7q9rkg2q9z4swmhdqmhlz3c50x4
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.2
+    sha256: 1vsj5c1f2dza4l5zmjix4zh65lp8gsg6pw01h57pijx2id0g4bwi
+  pubspec_parse:
+    dependency: transitive
+    description:
+      name: pubspec_parse
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.2.1
+    sha256: 19dmr9k4wsqjnhlzp1lbrw8dv7a1gnwmr8l5j9zlw407rmfg20d1
+  random_string:
+    dependency: direct main
+    description:
+      name: random_string
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.3.1
+    sha256: 11cjiv75sgldvk3x7w6j77lgi08r6737wm94m3ylabylsr6zdyff
+  saslprep:
+    dependency: direct main
+    description:
+      name: saslprep
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.0.2
+    sha256: 04lss0xvm6p801p8306jdxg7k0b28kr6n65dz2f57dkca237kcw7
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.4.0
+    sha256: 0x2xl7glrnq0hdxpy2i94a4wxbdrd6dm46hvhzgjn8alsm8z0wz1
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.0.1
+    sha256: 199rbdbifj46lg3iynznnsbs8zr4dfcw0s7wan8v73nvpqvli82q
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.1.1
+    sha256: 1kqbaslz7bna9lldda3ibrjg0gczbzlwgm9cic8shg0bnl0v3s34
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.0.3
+    sha256: 0rr87nx2wdf9alippxiidqlgi82fbprnsarr1jswg9qin0yy4jpn
+  source_gen:
+    dependency: transitive
+    description:
+      name: source_gen
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.2.6
+    sha256: 1kxgx782lzpjhv736h0pz3lnxpcgiy05h0ysy0q77gix8q09i1hz
+  source_helper:
+    dependency: transitive
+    description:
+      name: source_helper
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.3.3
+    sha256: 044kzmzlfpx93s4raz5avijahizmvai0zvl0lbm4wi93ynhdp1pd
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.1
+    sha256: 0b5d4c5n5qd3j8n10gp1khhr508wfl3819bhk6xnl34qxz8n032k
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 0.10.11
+    sha256: 18ixrlz3l2alk3hp0884qj0mcgzhxmjpg6nq0n1200pfy62pc4z6
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.9.1
+    sha256: 1lq4sy7lw15qsv9cijf6l48p16qr19r7njzwr4pxn8vv1kh6rb86
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.11.0
+    sha256: 0bggqvvpkrfvqz24bnir4959k0c45azc3zivk4lyv3mvba6092na
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.1
+    sha256: 054by84c60yxphr3qgg6f82gg6d22a54aqjp265anlm8dwz1ji32
+  stream_transform:
+    dependency: transitive
+    description:
+      name: stream_transform
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.1.0
+    sha256: 0jq6767v9ds17i2nd6mdd9i0f7nvsgg3dz74d0v54x66axjgr0gp
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.2.0
+    sha256: 0p1r0v2923avwfg03rk0pmc6f21m0zxpcx6i57xygd25k6hdfi00
+  synchronized:
+    dependency: direct main
+    description:
+      name: synchronized
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.0.0+2
+    sha256: 1j6108cq1hbcqpwhk9sah8q3gcidd7222bzhha2nk9syxhzqy82i
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.2.1
+    sha256: 1x8nspxaccls0sxjamp703yp55yxdvhj6wg21lzwd296i9rwlxh9
+  test:
+    dependency: direct dev
+    description:
+      name: test
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.22.0
+    sha256: 08kimbjvkdw3bkj7za36p3yqdr8dnlb5v30c250kvdncb7k09h4x
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 0.4.16
+    sha256: 0mfyjpqkkmaqdh7xygrydx12591wq9ll816f61n80dc6rmkdx7px
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 0.4.20
+    sha256: 1r8dnvkxxvh55z1c8lrsja1m0dkf5i4lgwwqixcx0mqvxx5w3005
+  timing:
+    dependency: transitive
+    description:
+      name: timing
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.0.0
+    sha256: 0a02znvy0fbzr0n4ai67pp8in7w6m768aynkk1kp5lnmgy17ppsg
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.3.1
+    sha256: 1x402bvyzdmdvmyqhyfamjxf54p9j8sa8ns2n5dwsdhnfqbw859g
+  unorm_dart:
+    dependency: transitive
+    description:
+      name: unorm_dart
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 0.2.0
+    sha256: 05kyk2764yz14pzgx00i7h5b1lzh8kjqnxspfzyf8z920bcgbz0v
+  uuid:
+    dependency: direct main
+    description:
+      name: uuid
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.0.5
+    sha256: 12lsynr07lw9848jknmzxvzn3ia12xdj07iiva0vg0qjvpq7ladg
+  very_good_analysis:
+    dependency: direct dev
+    description:
+      name: very_good_analysis
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.1.0
+    sha256: 1p2dh8aahbqyyqfzbsxswafgxnmxgisjq2xfp008skyh7imk6sz4
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 9.4.0
+    sha256: 05xaxaxzyfls6jklw1hzws2jmina1cjk10gbl7a63djh1ghnzjb5
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.0.2
+    sha256: 1sk7gvwa7s0h4l652qrgbh7l8wyqc6nr6lki8m4rj55720p0fnyg
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 2.2.0
+    sha256: 147amn05v1f1a1grxjr7yzgshrczjwijwiywggsv6dgic8kxyj5a
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 1.2.0
+    sha256: 0z400dzw7gf68a3wm95xi2mf461iigkyq6x69xgi7qs3fvpmn3hx
+  xml:
+    dependency: direct main
+    description:
+      name: xml
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 6.2.0
+    sha256: 0jwknkfcnb5svg6r01xjsj0aiw06mlx54pgay1ymaaqm2mjhyz01
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      url: https://pub.dartlang.org
+    source: hosted
+    version: 3.1.1
+    sha256: 0mqqmzn3c9rr38b5xm312fz1vyp6vb36lm477r9hak77bxzpp0iw
+sdks:
+  dart: '>=2.18.0 <3.0.0'