v18.0.0-rc.2

Co-authored-by: Lars Richard <lars.richard@iserv.eu>
(cherry picked from commit 81d884f899)

Co-authored-by: schmop <lars.richard@rocketmail.com>

.editorconfig

@@ -21,3 +21,6 @@ insert_final_newline = true
 indent_style = space
 indent_size = 4
 trim_trailing_whitespace = true
+
+[*.{yml,yaml}]
+indent_size = 2

.github/codecov.yml

@@ -1,12 +0,0 @@
-codecov:
-  allow_coverage_offsets: True
-coverage:
-  status:
-    project: off
-    patch: off
-comment:
-  layout: "diff, files"
-  behavior: default
-  require_changes: false
-  require_base: no
-  require_head: no

.github/workflows/notify-downstream.yaml

@@ -0,0 +1,25 @@
+name: Notify Downstream Projects
+on:
+  push:
+    branches: [ develop ]
+concurrency: ${{ github.workflow }}-${{ github.ref }}
+jobs:
+  notify-downstream:
+    continue-on-error: true
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - repo: vector-im/element-web
+            event: element-web-notify
+          - repo: matrix-org/matrix-react-sdk
+            event: upstream-sdk-notify
+
+    runs-on: ubuntu-latest
+    steps:
+      - name: Notify matrix-react-sdk repo that a new SDK build is on develop so it can CI against it
+        uses: peter-evans/repository-dispatch@v1
+        with:
+          token: ${{ secrets.ELEMENT_BOT_TOKEN }}
+          repository: ${{ matrix.repo }}
+          event-type: ${{ matrix.event }}

.github/workflows/pr_details.yml

@@ -0,0 +1,59 @@
+# Find details about the PR associated with this ref
+# Outputs:
+#  prnumber: the ID number of the associated PR
+#  headref: the name of the head branch of the PR
+#  baseref: the name of the base branch of the PR
+name: PR Details
+on:
+  workflow_call:
+    inputs:
+      owner:
+        type: string
+        required: true
+        description: The github username of the owner of the head branch
+      branch:
+        type: string
+        required: true
+        description: The name of the head branch
+    outputs:
+      pr_id:
+        description: The ID of the PR found
+        value: ${{ jobs.prdetails.outputs.pr_id }}
+      head_branch:
+        description: The head branch of the PR found
+        value: ${{ jobs.prdetails.outputs.head_branch }}
+      base_branch:
+        description: The base branch of the PR found
+        value: ${{ jobs.prdetails.outputs.base_branch }}
+
+jobs:
+  prdetails:
+    name: Find PR Details
+    runs-on: ubuntu-latest
+    steps:
+      - name: "🔍 Read PR details"
+        id: details
+        # We need to find the PR number that corresponds to the branch, which we do by searching the GH API
+        # The workflow_run event includes a list of pull requests, but it doesn't get populated for
+        # forked PRs: https://docs.github.com/en/rest/reference/checks#create-a-check-run
+        run: |
+          head_branch='${{ inputs.owner }}:${{ inputs.branch }}'
+          echo "Head branch: $head_branch"
+          pulls_uri="https://api.github.com/repos/${{ github.repository }}/pulls?head=$(jq -Rr '@uri' <<<$head_branch)"
+          pr_data=$(curl -s -H 'Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}' "$pulls_uri")
+
+          pr_number=$(jq -r '.[] | .number' <<< "$pr_data")
+          echo "PR number: $pr_number"
+          echo "::set-output name=prnumber::$pr_number"
+
+          head_ref=$(jq -r '.[] | .head.ref' <<< "$pr_data")
+          echo "Head ref: $head_ref"
+          echo "::set-output name=headref::$head_ref"
+
+          base_ref=$(jq -r '.[] | .base.ref' <<< "$pr_data")
+          echo "Base ref: $base_ref"
+          echo "::set-output name=baseref::$base_ref"
+    outputs:
+      pr_id: ${{ steps.details.outputs.prnumber }}
+      head_branch: ${{ steps.details.outputs.headref }}
+      base_branch: ${{ steps.details.outputs.baseref }}

.github/workflows/preview_changelog.yaml

@@ -1,12 +0,0 @@
-name: Preview Changelog
-on:
-  pull_request_target:
-    types: [ opened, edited, labeled ]
-jobs:
-    changelog:
-        runs-on: ubuntu-latest
-        steps:
-            - name: Preview Changelog
-              uses: matrix-org/allchange@main
-              with:
-                  ghToken: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pull_request.yaml

@@ -0,0 +1,28 @@
+name: Pull Request
+on:
+  pull_request_target:
+    types: [ opened, edited, labeled, unlabeled, synchronize ]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  changelog:
+    name: Preview Changelog
+    if: github.event.action != 'synchronize'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: matrix-org/allchange@main
+        with:
+          ghToken: ${{ secrets.GITHUB_TOKEN }}
+
+  enforce-label:
+    name: Enforce Labels
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: read
+    steps:
+      - uses: yogevbd/enforce-label-action@2.1.0
+        with:
+          REQUIRED_LABELS_ANY: "T-Defect,T-Deprecation,T-Enhancement,T-Task"
+          BANNED_LABELS: "X-Blocked"
+          BANNED_LABELS_DESCRIPTION: "Preventing merge whilst PR is marked blocked!"

.github/workflows/sonarcloud.yml

@@ -0,0 +1,91 @@
+name: SonarCloud
+on:
+  workflow_call:
+    inputs:
+      repo:
+        type: string
+        required: true
+        description: The full name of the repo in org/repo format
+      head_branch:
+        type: string
+        required: true
+        description: The name of the head branch
+      # We cannot use ${{ github.sha }} here as for pull requests it'll be a simulated merge commit instead
+      revision:
+        type: string
+        required: true
+        description: The git revision with which this sonar run should be associated
+
+      # Coverage specific parameters, assumes coverage reports live in a /coverage/ directory
+      coverage_workflow_name:
+        type: string
+        required: false
+        description: The name of the workflow which uploaded the `coverage` artifact, if any
+      coverage_run_id:
+        type: string
+        required: false
+        description: The run_id of the workflow which upload the coverage relevant to this run
+
+      # PR specific parameters
+      pr_id:
+        type: string
+        required: false
+        description: The ID number of the PR if this workflow is being triggered due to one
+      base_branch:
+        type: string
+        required: false
+        description: The base branch of the PR if this workflow is being triggered due to one
+
+      # Org specific parameters
+      main_branch:
+        type: string
+        required: false
+        description: The default branch of the repository
+        default: "develop"
+    secrets:
+      SONAR_TOKEN:
+        required: true
+jobs:
+  analysis:
+    name: Analysis
+    runs-on: ubuntu-latest
+    steps:
+      - name: "🧮 Checkout code"
+        uses: actions/checkout@v3
+        with:
+          repository: ${{ inputs.repo }}
+          ref: ${{ inputs.head_branch }} # checkout commit that triggered this workflow
+          fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
+
+      # Fetch develop so that Sonar can identify new issues in PR builds
+      - name: "📕 Fetch ${{ inputs.main_branch }}"
+        if: inputs.head_branch != inputs.main_branch
+        run: git rev-parse HEAD && git fetch origin ${{ inputs.main_branch }}:${{ inputs.main_branch }} && git status && git rev-parse HEAD
+
+      # There's a 'download artifact' action, but it hasn't been updated for the workflow_run action
+      # (https://github.com/actions/download-artifact/issues/60) so instead we get this mess:
+      - name: "📥 Download Coverage Report"
+        uses: dawidd6/action-download-artifact@v2
+        if: inputs.coverage_workflow_name
+        with:
+          workflow: ${{ inputs.coverage_workflow_name }}
+          run_id: ${{ inputs.coverage_run_id }}
+          name: coverage
+          path: coverage
+
+      - name: "🔍 Read package.json version"
+        id: version
+        uses: martinbeentjes/npm-get-version-action@main
+
+      - name: "🩻 SonarCloud Scan"
+        uses: SonarSource/sonarcloud-github-action@master
+        with:
+          args: >
+            -Dsonar.projectVersion=${{ steps.version.outputs.current-version }}
+            -Dsonar.scm.revision=${{ inputs.revision }}
+            -Dsonar.pullrequest.key=${{ inputs.pr_id }}
+            -Dsonar.pullrequest.branch=${{ inputs.pr_id && inputs.head_branch }}
+            -Dsonar.pullrequest.base=${{ inputs.pr_id && inputs.base_branch }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # Needed to get PR information, if any
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}

.github/workflows/sonarqube.yml

@@ -0,0 +1,37 @@
+name: SonarQube
+on:
+  workflow_run:
+    workflows: [ "Tests" ]
+    types:
+      - completed
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  prdetails:
+    name: ℹ️ PR Details
+    if: github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request'
+    uses: matrix-org/matrix-js-sdk/.github/workflows/pr_details.yml@develop
+    with:
+      owner: ${{ github.event.workflow_run.head_repository.owner.login }}
+      branch: ${{ github.event.workflow_run.head_branch }}
+
+  sonarqube:
+    name: 🩻 SonarQube
+    needs: prdetails
+    # Only wait for prdetails if it isn't skipped
+    if: |
+      always() &&
+      (needs.prdetails.result == 'success' || needs.prdetails.result == 'skipped') &&
+      github.event.workflow_run.conclusion == 'success'
+    uses: matrix-org/matrix-js-sdk/.github/workflows/sonarcloud.yml@develop
+    with:
+      repo: ${{ github.event.workflow_run.head_repository.full_name }}
+      pr_id: ${{ needs.prdetails.outputs.pr_id }}
+      head_branch: ${{ needs.prdetails.outputs.head_branch || github.event.workflow_run.head_branch }}
+      base_branch: ${{ needs.prdetails.outputs.base_branch }}
+      revision: ${{ github.event.workflow_run.head_sha }}
+      coverage_workflow_name: tests.yml
+      coverage_run_id: ${{ github.event.workflow_run.id }}
+    secrets:
+      SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}

.github/workflows/static_analysis.yml

@@ -0,0 +1,56 @@
+name: Static Analysis
+on:
+  pull_request: { }
+  push:
+    branches: [ develop, master ]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  ts_lint:
+    name: "Typescript Syntax Check"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v3
+        with:
+          cache: 'yarn'
+
+      - name: Install Deps
+        run: "yarn install"
+
+      - name: Typecheck
+        run: "yarn run lint:types"
+
+  js_lint:
+    name: "ESLint"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v3
+        with:
+          cache: 'yarn'
+
+      - name: Install Deps
+        run: "yarn install"
+
+      - name: Run Linter
+        run: "yarn run lint:js"
+
+  docs:
+    name: "JSDoc Checker"
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v3
+        with:
+          cache: 'yarn'
+
+      - name: Install Deps
+        run: "yarn install"
+
+      - name: Generate Docs
+        run: "yarn run gendoc"

.github/workflows/test_coverage.yml

@@ -1,32 +0,0 @@
-name: Test coverage
-on:
-  pull_request: {}
-  push:
-    branches: [develop, main, master]
-jobs:
-  test-coverage:
-    runs-on: ubuntu-latest
-    env:
-      # This must be set for fetchdep.sh to get the right branch
-      PR_NUMBER: ${{github.event.number}}
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-        with:
-          # If this is a pull request, make sure we check out its head rather than the
-          # automatically generated merge commit, so that the coverage diff excludes
-          # unrelated changes in the base branch
-          ref: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || '' }}
-
-      - name: Yarn cache
-        uses: c-hive/gha-yarn-cache@v2
-
-      - name: Run tests with coverage
-        run: "yarn install && yarn build && yarn coverage"
-
-      - name: Upload coverage
-        uses: codecov/codecov-action@v2
-        with:
-          fail_ci_if_error: false
-          verbose: true
-          override_commit: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.sha || '' }}

.github/workflows/tests.yml

@@ -0,0 +1,37 @@
+name: Tests
+on:
+  pull_request: { }
+  push:
+    branches: [ develop, master ]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  jest:
+    name: Jest
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Yarn cache
+        uses: actions/setup-node@v3
+        with:
+          cache: 'yarn'
+
+      - name: Install dependencies
+        run: "yarn install"
+
+      - name: Build
+        run: "yarn build"
+
+      - name: Run tests with coverage
+        run: "yarn coverage --ci"
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: coverage
+          path: |
+            coverage
+            !coverage/lcov-report

.github/workflows/upgrade_dependencies.yml

@@ -0,0 +1,38 @@
+name: Upgrade Dependencies
+on:
+  workflow_dispatch: { }
+  workflow_call:
+    secrets:
+      ELEMENT_BOT_TOKEN:
+        required: true
+jobs:
+  upgrade:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions/setup-node@v3
+        with:
+          cache: 'yarn'
+
+      - name: Upgrade
+        run: yarn upgrade && yarn install
+
+      - name: Create Pull Request
+        id: cpr
+        uses: peter-evans/create-pull-request@v4
+        with:
+          token: ${{ secrets.ELEMENT_BOT_TOKEN }}
+          branch: actions/upgrade-deps
+          delete-branch: true
+          title: Upgrade dependencies
+          labels: |
+            Dependencies
+            T-Task
+          
+      - name: Enable automerge
+        uses: peter-evans/enable-pull-request-automerge@v2
+        if: steps.cpr.outputs.pull-request-operation == 'created'
+        with:
+          token: ${{ secrets.ELEMENT_BOT_TOKEN }}
+          pull-request-number: ${{ steps.cpr.outputs.pull-request-number }}

CHANGELOG.md

@@ -1,3 +1,26 @@
+Changes in [18.0.0-rc.2](https://github.com/matrix-org/matrix-js-sdk/releases/tag/v18.0.0-rc.2) (2022-05-20)
+============================================================================================================
+
+## 🐛 Bug Fixes
+ * Catch promise errors in degradable ([\#2388](https://github.com/matrix-org/matrix-js-sdk/pull/2388)). Fixes #2384.
+
+Changes in [18.0.0-rc.1](https://github.com/matrix-org/matrix-js-sdk/releases/tag/v18.0.0-rc.1) (2022-05-17)
+============================================================================================================
+
+Changes in [17.2.0](https://github.com/matrix-org/matrix-js-sdk/releases/tag/v17.2.0) (2022-05-10)
+==================================================================================================
+
+## ✨ Features
+ * Live location sharing: handle encrypted messages in processBeaconEvents ([\#2327](https://github.com/matrix-org/matrix-js-sdk/pull/2327)).
+
+## 🐛 Bug Fixes
+ * Fix race conditions around threads ([\#2331](https://github.com/matrix-org/matrix-js-sdk/pull/2331)). Fixes vector-im/element-web#21627.
+ * Ignore m.replace relations on state events, they're invalid ([\#2306](https://github.com/matrix-org/matrix-js-sdk/pull/2306)). Fixes vector-im/element-web#21851.
+ * fix example in readme ([\#2315](https://github.com/matrix-org/matrix-js-sdk/pull/2315)).
+ * Don't decrement the length count of a thread when root redacted ([\#2314](https://github.com/matrix-org/matrix-js-sdk/pull/2314)).
+ * Prevent attempt to create thread with id "undefined" ([\#2308](https://github.com/matrix-org/matrix-js-sdk/pull/2308)).
+ * Update threads handling for replies-to-thread-responses as per MSC update ([\#2305](https://github.com/matrix-org/matrix-js-sdk/pull/2305)). Fixes vector-im/element-web#19678.
+
 Changes in [17.1.0](https://github.com/matrix-org/matrix-js-sdk/releases/tag/v17.1.0) (2022-04-26)
 ==================================================================================================
 
@@ -684,7 +707,7 @@ Changes in [11.0.0-rc.1](https://github.com/matrix-org/matrix-js-sdk/releases/ta
 BREAKING CHANGES
 ---
 
- * `MatrixCall` and related APIs have been redesigned to support multiple streams 
+ * `MatrixCall` and related APIs have been redesigned to support multiple streams
    (see [\#1660](https://github.com/matrix-org/matrix-js-sdk/pull/1660) for more details)
 
 All changes
@@ -1357,7 +1380,7 @@ BREAKING CHANGES
 ---
 
 * `RoomState` events changed to use a Map instead of an object, which changes the collection APIs available to access them.
- 
+
 All Changes
 ---
 

CONTRIBUTING.md

@@ -243,3 +243,15 @@ on Git 2.17+ you can mass signoff using rebase:
 ```
 git rebase --signoff origin/develop
 ```
+
+Merge Strategy
+==============
+
+The preferred method for merging pull requests is squash merging to keep the
+commit history trim, but it is up to the discretion of the team member merging
+the change. When stacking pull requests, you may wish to do the following:
+
+1. Branch from develop to your branch (branch1), push commits onto it and open a pull request
+2. Branch from your base branch (branch1) to your work branch (branch2), push commits and open a pull request configuring the base to be branch1, saying in the description that it is based on your other PR.
+3. Merge the first PR using a merge commit otherwise your stacked PR will need a rebase. Github will automatically adjust the base branch of your other PR to be develop.
+

README.md

@@ -1,3 +1,11 @@
+[![npm](https://img.shields.io/npm/v/matrix-js-sdk)](https://www.npmjs.com/package/matrix-js-sdk)
+![Tests](https://github.com/matrix-org/matrix-js-sdk/actions/workflows/tests.yml/badge.svg)
+![Static Analysis](https://github.com/matrix-org/matrix-js-sdk/actions/workflows/static_analysis.yml/badge.svg)
+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=matrix-js-sdk&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=matrix-js-sdk)
+[![Coverage](https://sonarcloud.io/api/project_badges/measure?project=matrix-js-sdk&metric=coverage)](https://sonarcloud.io/summary/new_code?id=matrix-js-sdk)
+[![Vulnerabilities](https://sonarcloud.io/api/project_badges/measure?project=matrix-js-sdk&metric=vulnerabilities)](https://sonarcloud.io/summary/new_code?id=matrix-js-sdk)
+[![Bugs](https://sonarcloud.io/api/project_badges/measure?project=matrix-js-sdk&metric=bugs)](https://sonarcloud.io/summary/new_code?id=matrix-js-sdk)
+
 Matrix Javascript SDK
 =====================
 
@@ -16,7 +24,7 @@ attached to ``window`` through which you can access the SDK. See below for how t
 include libolm to enable end-to-end-encryption.
 
 The browser bundle supports recent versions of browsers. Typically this is ES2015
-or `> 0.5%, last 2 versions, Firefox ESR, not dead` if using 
+or `> 0.5%, last 2 versions, Firefox ESR, not dead` if using
 [browserlists](https://github.com/browserslist/browserslist).
 
 Please check [the working browser example](examples/browser) for more information.
@@ -26,11 +34,11 @@ In Node.js
 
 Ensure you have the latest LTS version of Node.js installed.
 
-This SDK targets Node 10 for compatibility, which translates to ES6. If you're using
+This SDK targets Node 12 for compatibility, which translates to ES6. If you're using
 a bundler like webpack you'll likely have to transpile dependencies, including this
 SDK, to match your target browsers.
 
-Using `yarn` instead of `npm` is recommended. Please see the Yarn [install guide](https://classic.yarnpkg.com/en/docs/install) 
+Using `yarn` instead of `npm` is recommended. Please see the Yarn [install guide](https://classic.yarnpkg.com/en/docs/install)
 if you do not have it already.
 
 ``yarn add matrix-js-sdk``
@@ -307,7 +315,7 @@ The SDK supports end-to-end encryption via the Olm and Megolm protocols, using
 [libolm](https://gitlab.matrix.org/matrix-org/olm). It is left up to the
 application to make libolm available, via the ``Olm`` global.
 
-It is also necessary to call ``matrixClient.initCrypto()`` after creating a new
+It is also necessary to call ``await matrixClient.initCrypto()`` after creating a new
 ``MatrixClient`` (but **before** calling ``matrixClient.startClient()``) to
 initialise the crypto layer.
 

package.json

@@ -1,7 +1,10 @@
 {
   "name": "matrix-js-sdk",
-  "version": "17.1.0",
+  "version": "18.0.0-rc.2",
   "description": "Matrix Client-Server SDK for Javascript",
+  "engines": {
+    "node": ">=12.9.0"
+  },
   "scripts": {
     "prepublishOnly": "yarn build",
     "start": "echo THIS IS FOR LEGACY PURPOSES ONLY. && babel src -w -s -d lib --verbose --extensions \".ts,.js\"",
@@ -97,6 +100,7 @@
     "fake-indexeddb": "^3.1.2",
     "jest": "^26.6.3",
     "jest-localstorage-mock": "^2.4.6",
+    "jest-sonar-reporter": "^2.0.0",
     "jsdoc": "^3.6.6",
     "matrix-mock-request": "^1.2.3",
     "rimraf": "^3.0.2",
@@ -113,9 +117,14 @@
       "<rootDir>/src/**/*.{js,ts}"
     ],
     "coverageReporters": [
-      "text",
-      "json"
-    ]
+      "text-summary",
+      "lcov"
+    ],
+    "testResultsProcessor": "jest-sonar-reporter"
+  },
+  "jestSonar": {
+    "reportPath": "coverage",
+    "sonar56x": true
   },
   "typings": "./lib/index.d.ts"
 }

sonar-project.properties

@@ -0,0 +1,16 @@
+sonar.projectKey=matrix-js-sdk
+sonar.organization=matrix-org
+
+# Encoding of the source code. Default is default system encoding
+#sonar.sourceEncoding=UTF-8
+
+sonar.sources=src
+sonar.tests=spec
+sonar.exclusions=docs,examples,git-hooks
+
+sonar.typescript.tsconfigPath=./tsconfig.json
+sonar.javascript.lcov.reportPaths=coverage/lcov.info
+sonar.coverage.exclusions=spec/**/*
+sonar.testExecutionReportPaths=coverage/test-report.xml
+
+sonar.lang.patterns.ts=**/*.ts,**/*.tsx

spec/browserify/sync-browserify.spec.js

@@ -47,7 +47,7 @@ describe("Browserify Test", function() {
         httpBackend.stop();
     });
 
-    it("Sync", async function() {
+    it("Sync", function() {
         const event = utils.mkMembership({
             room: ROOM_ID,
             mship: "join",
@@ -71,7 +71,7 @@ describe("Browserify Test", function() {
         };
 
         httpBackend.when("GET", "/sync").respond(200, syncData);
-        return await Promise.race([
+        return Promise.race([
             httpBackend.flushAllExpected(),
             new Promise((_, reject) => {
                 client.once("sync.unexpectedError", reject);

spec/integ/matrix-client-event-timeline.spec.js

@@ -526,8 +526,7 @@ describe("MatrixClient event timelines", function() {
                     return {
                         original_event: THREAD_ROOT,
                         chunk: [THREAD_REPLY],
-                        next_batch: "next_batch_token0",
-                        prev_batch: "prev_batch_token0",
+                        // no next batch as this is the oldest end of the timeline
                     };
                 });
 
@@ -536,8 +535,8 @@ describe("MatrixClient event timelines", function() {
 
             const timeline = await timelinePromise;
 
-            expect(timeline.getEvents().find(e => e.getId() === THREAD_ROOT.event_id));
-            expect(timeline.getEvents().find(e => e.getId() === THREAD_REPLY.event_id));
+            expect(timeline.getEvents().find(e => e.getId() === THREAD_ROOT.event_id)).toBeTruthy();
+            expect(timeline.getEvents().find(e => e.getId() === THREAD_REPLY.event_id)).toBeTruthy();
         });
     });
 

spec/integ/matrix-client-methods.spec.js

@@ -1,3 +1,19 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 import * as utils from "../test-utils/test-utils";
 import { CRYPTO_ENABLED } from "../../src/client";
 import { MatrixEvent } from "../../src/models/event";
@@ -797,7 +813,7 @@ describe("MatrixClient", function() {
             ]);
         });
 
-        it("sends reply to thread responses to thread timeline only", () => {
+        it("sends reply to thread responses to main timeline only", () => {
             client.clientOpts = { experimentalThreadSupport: true };
 
             const threadRootEvent = buildEventPollStartThreadRoot();
@@ -814,15 +830,180 @@ describe("MatrixClient", function() {
 
             expect(timeline).toEqual([
                 threadRootEvent,
+                replyToThreadResponse,
             ]);
 
             expect(threaded).toEqual([
                 threadRootEvent,
                 eventMessageInThread,
-                replyToThreadResponse,
             ]);
         });
     });
+
+    describe("getThirdpartyUser", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = [{
+                userid: "@Bob",
+                protocol: "irc",
+                fields: {},
+            }];
+
+            const prom = client.getThirdpartyUser("irc", {});
+            httpBackend.when("GET", "/thirdparty/user/irc").respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("getThirdpartyLocation", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = [{
+                alias: "#alias",
+                protocol: "irc",
+                fields: {},
+            }];
+
+            const prom = client.getThirdpartyLocation("irc", {});
+            httpBackend.when("GET", "/thirdparty/location/irc").respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("getPushers", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = {
+                pushers: [],
+            };
+
+            const prom = client.getPushers();
+            httpBackend.when("GET", "/pushers").respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("getKeyChanges", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = {
+                changed: [],
+                left: [],
+            };
+
+            const prom = client.getKeyChanges("old", "new");
+            httpBackend.when("GET", "/keys/changes").check((req) => {
+                expect(req.queryParams.from).toEqual("old");
+                expect(req.queryParams.to).toEqual("new");
+            }).respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("getDevices", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = {
+                devices: [],
+            };
+
+            const prom = client.getDevices();
+            httpBackend.when("GET", "/devices").respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("getDevice", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = {
+                device_id: "DEADBEEF",
+                display_name: "NotAPhone",
+                last_seen_ip: "127.0.0.1",
+                last_seen_ts: 1,
+            };
+
+            const prom = client.getDevice("DEADBEEF");
+            httpBackend.when("GET", "/devices/DEADBEEF").respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("getThreePids", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = {
+                threepids: [],
+            };
+
+            const prom = client.getThreePids();
+            httpBackend.when("GET", "/account/3pid").respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("deleteAlias", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = {};
+            const prom = client.deleteAlias("#foo:bar");
+            httpBackend.when("DELETE", "/directory/room/" + encodeURIComponent("#foo:bar")).respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("deleteRoomTag", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = {};
+            const prom = client.deleteRoomTag("!roomId:server", "u.tag");
+            const url = `/user/${encodeURIComponent(userId)}/rooms/${encodeURIComponent("!roomId:server")}/tags/u.tag`;
+            httpBackend.when("DELETE", url).respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("getRoomTags", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = {
+                tags: {
+                    "u.tag": {
+                        order: 0.5,
+                    },
+                },
+            };
+
+            const prom = client.getRoomTags("!roomId:server");
+            const url = `/user/${encodeURIComponent(userId)}/rooms/${encodeURIComponent("!roomId:server")}/tags`;
+            httpBackend.when("GET", url).respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
+
+    describe("requestRegisterEmailToken", () => {
+        it("should hit the expected API endpoint", async () => {
+            const response = {
+                sid: "random_sid",
+                submit_url: "https://foobar.matrix/_matrix/matrix",
+            };
+
+            httpBackend.when("GET", "/_matrix/client/versions").respond(200, {
+                versions: ["r0.5.0"],
+            });
+
+            const prom = client.requestRegisterEmailToken("bob@email", "secret", 1);
+            httpBackend.when("POST", "/register/email/requestToken").check(req => {
+                expect(req.data).toStrictEqual({
+                    email: "bob@email",
+                    client_secret: "secret",
+                    send_attempt: 1,
+                });
+            }).respond(200, response);
+            await httpBackend.flush();
+            expect(await prom).toStrictEqual(response);
+        });
+    });
 });
 
 function withThreadId(event, newThreadId) {

spec/unit/content-helpers.spec.ts

@@ -17,7 +17,13 @@ limitations under the License.
 import { REFERENCE_RELATION } from "matrix-events-sdk";
 
 import { LocationAssetType, M_ASSET, M_LOCATION, M_TIMESTAMP } from "../../src/@types/location";
-import { makeBeaconContent, makeBeaconInfoContent } from "../../src/content-helpers";
+import { M_TOPIC } from "../../src/@types/topic";
+import {
+    makeBeaconContent,
+    makeBeaconInfoContent,
+    makeTopicContent,
+    parseTopicContent,
+} from "../../src/content-helpers";
 
 describe('Beacon content helpers', () => {
     describe('makeBeaconInfoContent()', () => {
@@ -122,3 +128,68 @@ describe('Beacon content helpers', () => {
         });
     });
 });
+
+describe('Topic content helpers', () => {
+    describe('makeTopicContent()', () => {
+        it('creates fully defined event content without html', () => {
+            expect(makeTopicContent("pizza")).toEqual({
+                topic: "pizza",
+                [M_TOPIC.name]: [{
+                    body: "pizza",
+                    mimetype: "text/plain",
+                }],
+            });
+        });
+
+        it('creates fully defined event content with html', () => {
+            expect(makeTopicContent("pizza", "<b>pizza</b>")).toEqual({
+                topic: "pizza",
+                [M_TOPIC.name]: [{
+                    body: "pizza",
+                    mimetype: "text/plain",
+                }, {
+                    body: "<b>pizza</b>",
+                    mimetype: "text/html",
+                }],
+            });
+        });
+    });
+
+    describe('parseTopicContent()', () => {
+        it('parses event content with plain text topic without mimetype', () => {
+            expect(parseTopicContent({
+                topic: "pizza",
+                [M_TOPIC.name]: [{
+                    body: "pizza",
+                }],
+            })).toEqual({
+                text: "pizza",
+            });
+        });
+
+        it('parses event content with plain text topic', () => {
+            expect(parseTopicContent({
+                topic: "pizza",
+                [M_TOPIC.name]: [{
+                    body: "pizza",
+                    mimetype: "text/plain",
+                }],
+            })).toEqual({
+                text: "pizza",
+            });
+        });
+
+        it('parses event content with html topic', () => {
+            expect(parseTopicContent({
+                topic: "pizza",
+                [M_TOPIC.name]: [{
+                    body: "<b>pizza</b>",
+                    mimetype: "text/html",
+                }],
+            })).toEqual({
+                text: "pizza",
+                html: "<b>pizza</b>",
+            });
+        });
+    });
+});

spec/unit/crypto/cross-signing.spec.js

@@ -883,4 +883,138 @@ describe("Cross Signing", function() {
         expect(bobTrust3.isCrossSigningVerified()).toBeTruthy();
         expect(bobTrust3.isTofu()).toBeTruthy();
     });
+
+    it(
+        "should observe that our own device is cross-signed, even if this device doesn't trust the key",
+        async function() {
+            const { client: alice } = await makeTestClient(
+                { userId: "@alice:example.com", deviceId: "Osborne2" },
+            );
+            alice.uploadDeviceSigningKeys = async () => {};
+            alice.uploadKeySignatures = async () => {};
+
+            // Generate Alice's SSK etc
+            const aliceMasterSigning = new global.Olm.PkSigning();
+            const aliceMasterPrivkey = aliceMasterSigning.generate_seed();
+            const aliceMasterPubkey = aliceMasterSigning.init_with_seed(aliceMasterPrivkey);
+            const aliceSigning = new global.Olm.PkSigning();
+            const alicePrivkey = aliceSigning.generate_seed();
+            const alicePubkey = aliceSigning.init_with_seed(alicePrivkey);
+            const aliceSSK = {
+                user_id: "@alice:example.com",
+                usage: ["self_signing"],
+                keys: {
+                    ["ed25519:" + alicePubkey]: alicePubkey,
+                },
+            };
+            const sskSig = aliceMasterSigning.sign(anotherjson.stringify(aliceSSK));
+            aliceSSK.signatures = {
+                "@alice:example.com": {
+                    ["ed25519:" + aliceMasterPubkey]: sskSig,
+                },
+            };
+
+            // Alice's device downloads the keys, but doesn't trust them yet
+            alice.crypto.deviceList.storeCrossSigningForUser("@alice:example.com", {
+                keys: {
+                    master: {
+                        user_id: "@alice:example.com",
+                        usage: ["master"],
+                        keys: {
+                            ["ed25519:" + aliceMasterPubkey]: aliceMasterPubkey,
+                        },
+                    },
+                    self_signing: aliceSSK,
+                },
+                firstUse: 1,
+                unsigned: {},
+            });
+
+            // Alice has a second device that's cross-signed
+            const aliceCrossSignedDevice = {
+                user_id: "@alice:example.com",
+                device_id: "Dynabook",
+                algorithms: ["m.olm.curve25519-aes-sha256", "m.megolm.v1.aes-sha"],
+                keys: {
+                    "curve25519:Dynabook": "somePubkey",
+                    "ed25519:Dynabook": "someOtherPubkey",
+                },
+            };
+            const sig = aliceSigning.sign(anotherjson.stringify(aliceCrossSignedDevice));
+            aliceCrossSignedDevice.signatures = {
+                "@alice:example.com": {
+                    ["ed25519:" + alicePubkey]: sig,
+                },
+            };
+            alice.crypto.deviceList.storeDevicesForUser("@alice:example.com", {
+                Dynabook: aliceCrossSignedDevice,
+            });
+
+            // We don't trust the cross-signing keys yet...
+            expect(alice.checkDeviceTrust(aliceCrossSignedDevice.device_id).isCrossSigningVerified()).toBeFalsy();
+            // ... but we do acknowledge that the device is signed by them
+            expect(alice.checkIfOwnDeviceCrossSigned(aliceCrossSignedDevice.device_id)).toBeTruthy();
+        },
+    );
+
+    it("should observe that our own device isn't cross-signed", async function() {
+        const { client: alice } = await makeTestClient(
+            { userId: "@alice:example.com", deviceId: "Osborne2" },
+        );
+        alice.uploadDeviceSigningKeys = async () => {};
+        alice.uploadKeySignatures = async () => {};
+
+        // Generate Alice's SSK etc
+        const aliceMasterSigning = new global.Olm.PkSigning();
+        const aliceMasterPrivkey = aliceMasterSigning.generate_seed();
+        const aliceMasterPubkey = aliceMasterSigning.init_with_seed(aliceMasterPrivkey);
+        const aliceSigning = new global.Olm.PkSigning();
+        const alicePrivkey = aliceSigning.generate_seed();
+        const alicePubkey = aliceSigning.init_with_seed(alicePrivkey);
+        const aliceSSK = {
+            user_id: "@alice:example.com",
+            usage: ["self_signing"],
+            keys: {
+                ["ed25519:" + alicePubkey]: alicePubkey,
+            },
+        };
+        const sskSig = aliceMasterSigning.sign(anotherjson.stringify(aliceSSK));
+        aliceSSK.signatures = {
+            "@alice:example.com": {
+                ["ed25519:" + aliceMasterPubkey]: sskSig,
+            },
+        };
+
+        // Alice's device downloads the keys
+        alice.crypto.deviceList.storeCrossSigningForUser("@alice:example.com", {
+            keys: {
+                master: {
+                    user_id: "@alice:example.com",
+                    usage: ["master"],
+                    keys: {
+                        ["ed25519:" + aliceMasterPubkey]: aliceMasterPubkey,
+                    },
+                },
+                self_signing: aliceSSK,
+            },
+            firstUse: 1,
+            unsigned: {},
+        });
+
+        // Alice has a second device that's also not cross-signed
+        const aliceNotCrossSignedDevice = {
+            user_id: "@alice:example.com",
+            device_id: "Dynabook",
+            algorithms: ["m.olm.curve25519-aes-sha256", "m.megolm.v1.aes-sha"],
+            keys: {
+                "curve25519:Dynabook": "somePubkey",
+                "ed25519:Dynabook": "someOtherPubkey",
+            },
+        };
+        alice.crypto.deviceList.storeDevicesForUser("@alice:example.com", {
+            Dynabook: aliceNotCrossSignedDevice,
+        });
+
+        expect(alice.checkIfOwnDeviceCrossSigned(aliceNotCrossSignedDevice.device_id)).toBeFalsy();
+    });
 });

spec/unit/interactive-auth.spec.js

@@ -18,6 +18,8 @@ limitations under the License.
 import { logger } from "../../src/logger";
 import { InteractiveAuth } from "../../src/interactive-auth";
 import { MatrixError } from "../../src/http-api";
+import { sleep } from "../../src/utils";
+import { randomString } from "../../src/randomstring";
 
 // Trivial client object to test interactive auth
 // (we do not need TestClient here)
@@ -172,4 +174,107 @@ describe("InteractiveAuth", function() {
             expect(error.message).toBe('No appropriate authentication flow found');
         });
     });
+
+    describe("requestEmailToken", () => {
+        it("increases auth attempts", async () => {
+            const doRequest = jest.fn();
+            const stateUpdated = jest.fn();
+            const requestEmailToken = jest.fn();
+            requestEmailToken.mockImplementation(async () => ({ sid: "" }));
+
+            const ia = new InteractiveAuth({
+                matrixClient: new FakeClient(),
+                doRequest, stateUpdated, requestEmailToken,
+            });
+
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 1, undefined);
+            requestEmailToken.mockClear();
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 2, undefined);
+            requestEmailToken.mockClear();
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 3, undefined);
+            requestEmailToken.mockClear();
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 4, undefined);
+            requestEmailToken.mockClear();
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 5, undefined);
+        });
+
+        it("increases auth attempts", async () => {
+            const doRequest = jest.fn();
+            const stateUpdated = jest.fn();
+            const requestEmailToken = jest.fn();
+            requestEmailToken.mockImplementation(async () => ({ sid: "" }));
+
+            const ia = new InteractiveAuth({
+                matrixClient: new FakeClient(),
+                doRequest, stateUpdated, requestEmailToken,
+            });
+
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 1, undefined);
+            requestEmailToken.mockClear();
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 2, undefined);
+            requestEmailToken.mockClear();
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 3, undefined);
+            requestEmailToken.mockClear();
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 4, undefined);
+            requestEmailToken.mockClear();
+            await ia.requestEmailToken();
+            expect(requestEmailToken).toHaveBeenLastCalledWith(undefined, ia.getClientSecret(), 5, undefined);
+        });
+
+        it("passes errors through", async () => {
+            const doRequest = jest.fn();
+            const stateUpdated = jest.fn();
+            const requestEmailToken = jest.fn();
+            requestEmailToken.mockImplementation(async () => {
+                throw new Error("unspecific network error");
+            });
+
+            const ia = new InteractiveAuth({
+                matrixClient: new FakeClient(),
+                doRequest, stateUpdated, requestEmailToken,
+            });
+
+            expect(async () => await ia.requestEmailToken()).rejects.toThrowError("unspecific network error");
+        });
+
+        it("only starts one request at a time", async () => {
+            const doRequest = jest.fn();
+            const stateUpdated = jest.fn();
+            const requestEmailToken = jest.fn();
+            requestEmailToken.mockImplementation(() => sleep(500, { sid: "" }));
+
+            const ia = new InteractiveAuth({
+                matrixClient: new FakeClient(),
+                doRequest, stateUpdated, requestEmailToken,
+            });
+
+            await Promise.all([ia.requestEmailToken(), ia.requestEmailToken(), ia.requestEmailToken()]);
+            expect(requestEmailToken).toHaveBeenCalledTimes(1);
+        });
+
+        it("stores result in email sid", async () => {
+            const doRequest = jest.fn();
+            const stateUpdated = jest.fn();
+            const requestEmailToken = jest.fn();
+            const sid = randomString(24);
+            requestEmailToken.mockImplementation(() => sleep(500, { sid }));
+
+            const ia = new InteractiveAuth({
+                matrixClient: new FakeClient(),
+                doRequest, stateUpdated, requestEmailToken,
+            });
+
+            await ia.requestEmailToken();
+            expect(ia.getEmailSid()).toEqual(sid);
+        });
+    });
 });

spec/unit/matrix-client.spec.ts

@@ -29,10 +29,11 @@ import {
 import { MEGOLM_ALGORITHM } from "../../src/crypto/olmlib";
 import { EventStatus, MatrixEvent } from "../../src/models/event";
 import { Preset } from "../../src/@types/partials";
+import { ReceiptType } from "../../src/@types/read_receipts";
 import * as testUtils from "../test-utils/test-utils";
 import { makeBeaconInfoContent } from "../../src/content-helpers";
 import { M_BEACON_INFO } from "../../src/@types/beacon";
-import { Room } from "../../src";
+import { ContentHelpers, Room } from "../../src";
 import { makeBeaconEvent } from "../test-utils/beacon";
 
 jest.useFakeTimers();
@@ -90,7 +91,12 @@ describe("MatrixClient", function() {
     let pendingLookup = null;
     function httpReq(cb, method, path, qp, data, prefix) {
         if (path === KEEP_ALIVE_PATH && acceptKeepalives) {
-            return Promise.resolve();
+            return Promise.resolve({
+                unstable_features: {
+                    "org.matrix.msc3440.stable": true,
+                },
+                versions: ["r0.6.0", "r0.6.1"],
+            });
         }
         const next = httpLookups.shift();
         const logLine = (
@@ -811,9 +817,7 @@ describe("MatrixClient", function() {
                     }
                 },
             },
-            threads: {
-                get: jest.fn(),
-            },
+            getThread: jest.fn(),
             addPendingEvent: jest.fn(),
             updatePendingEvent: jest.fn(),
             reEmitter: {
@@ -994,6 +998,46 @@ describe("MatrixClient", function() {
         });
     });
 
+    describe("read-markers and read-receipts", () => {
+        it("setRoomReadMarkers", () => {
+            client.setRoomReadMarkersHttpRequest = jest.fn();
+            const room = {
+                hasPendingEvent: jest.fn().mockReturnValue(false),
+                addLocalEchoReceipt: jest.fn(),
+            };
+            const rrEvent = new MatrixEvent({ event_id: "read_event_id" });
+            const rpEvent = new MatrixEvent({ event_id: "read_private_event_id" });
+            client.getRoom = () => room;
+
+            client.setRoomReadMarkers(
+                "room_id",
+                "read_marker_event_id",
+                rrEvent,
+                rpEvent,
+            );
+
+            expect(client.setRoomReadMarkersHttpRequest).toHaveBeenCalledWith(
+                "room_id",
+                "read_marker_event_id",
+                "read_event_id",
+                "read_private_event_id",
+            );
+            expect(room.addLocalEchoReceipt).toHaveBeenCalledTimes(2);
+            expect(room.addLocalEchoReceipt).toHaveBeenNthCalledWith(
+                1,
+                client.credentials.userId,
+                rrEvent,
+                ReceiptType.Read,
+            );
+            expect(room.addLocalEchoReceipt).toHaveBeenNthCalledWith(
+                2,
+                client.credentials.userId,
+                rpEvent,
+                ReceiptType.ReadPrivate,
+            );
+        });
+    });
+
     describe("beacons", () => {
         const roomId = '!room:server.org';
         const content = makeBeaconInfoContent(100, true);
@@ -1047,7 +1091,7 @@ describe("MatrixClient", function() {
                 expect(roomStateProcessSpy).not.toHaveBeenCalled();
             });
 
-            it('calls room states processBeaconEvents with m.beacon events', () => {
+            it('calls room states processBeaconEvents with events', () => {
                 const room = new Room(roomId, client, userId);
                 const roomStateProcessSpy = jest.spyOn(room.currentState, 'processBeaconEvents');
 
@@ -1055,11 +1099,46 @@ describe("MatrixClient", function() {
                 const beaconEvent = makeBeaconEvent(userId);
 
                 client.processBeaconEvents(room, [messageEvent, beaconEvent]);
-                expect(roomStateProcessSpy).toHaveBeenCalledWith([beaconEvent]);
+                expect(roomStateProcessSpy).toHaveBeenCalledWith([messageEvent, beaconEvent], client);
             });
         });
     });
 
+    describe("setRoomTopic", () => {
+        const roomId = "!foofoofoofoofoofoo:matrix.org";
+        const createSendStateEventMock = (topic: string, htmlTopic?: string) => {
+            return jest.fn()
+                .mockImplementation((roomId: string, eventType: string, content: any, stateKey: string) => {
+                    expect(roomId).toEqual(roomId);
+                    expect(eventType).toEqual(EventType.RoomTopic);
+                    expect(content).toMatchObject(ContentHelpers.makeTopicContent(topic, htmlTopic));
+                    expect(stateKey).toBeUndefined();
+                    return Promise.resolve();
+                });
+        };
+
+        it("is called with plain text topic and sends state event", async () => {
+            const sendStateEvent = createSendStateEventMock("pizza");
+            client.sendStateEvent = sendStateEvent;
+            await client.setRoomTopic(roomId, "pizza");
+            expect(sendStateEvent).toHaveBeenCalledTimes(1);
+        });
+
+        it("is called with plain text topic and callback and sends state event", async () => {
+            const sendStateEvent = createSendStateEventMock("pizza");
+            client.sendStateEvent = sendStateEvent;
+            await client.setRoomTopic(roomId, "pizza", () => {});
+            expect(sendStateEvent).toHaveBeenCalledTimes(1);
+        });
+
+        it("is called with plain text and HTML topic and sends state event", async () => {
+            const sendStateEvent = createSendStateEventMock("pizza", "<b>pizza</b>");
+            client.sendStateEvent = sendStateEvent;
+            await client.setRoomTopic(roomId, "pizza", "<b>pizza</b>");
+            expect(sendStateEvent).toHaveBeenCalledTimes(1);
+        });
+    });
+
     describe("setPassword", () => {
         const auth = { session: 'abcdef', type: 'foo' };
         const newPassword = 'newpassword';

spec/unit/models/event.spec.ts

@@ -57,4 +57,31 @@ describe('MatrixEvent', () => {
         expect(a.toSnapshot().isEquivalentTo(a)).toBe(true);
         expect(a.toSnapshot().isEquivalentTo(b)).toBe(false);
     });
+
+    it("should prune clearEvent when being redacted", () => {
+        const ev = new MatrixEvent({
+            type: "m.room.message",
+            content: {
+                body: "Test",
+            },
+            event_id: "$event1:server",
+        });
+
+        expect(ev.getContent().body).toBe("Test");
+        expect(ev.getWireContent().body).toBe("Test");
+        ev.makeEncrypted("m.room.encrypted", { ciphertext: "xyz" }, "", "");
+        expect(ev.getContent().body).toBe("Test");
+        expect(ev.getWireContent().body).toBeUndefined();
+        expect(ev.getWireContent().ciphertext).toBe("xyz");
+
+        const redaction = new MatrixEvent({
+            type: "m.room.redaction",
+            redacts: ev.getId(),
+        });
+
+        ev.makeRedacted(redaction);
+        expect(ev.getContent().body).toBeUndefined();
+        expect(ev.getWireContent().body).toBeUndefined();
+        expect(ev.getWireContent().ciphertext).toBeUndefined();
+    });
 });

spec/unit/models/thread.spec.ts

@@ -0,0 +1,28 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { Thread } from "../../../src/models/thread";
+
+describe('Thread', () => {
+    describe("constructor", () => {
+        it("should explode for element-web#22141 logging", () => {
+            // Logging/debugging for https://github.com/vector-im/element-web/issues/22141
+            expect(() => {
+                new Thread("$event", undefined, {} as any); // deliberate cast to test error case
+            }).toThrow("element-web#22141: A thread requires a room in order to function");
+        });
+    });
+});

spec/unit/pushprocessor.spec.js

@@ -1,5 +1,6 @@
 import * as utils from "../test-utils/test-utils";
 import { PushProcessor } from "../../src/pushprocessor";
+import { EventType } from "../../src";
 
 describe('NotificationService', function() {
     const testUserId = "@ali:matrix.org";
@@ -208,6 +209,7 @@ describe('NotificationService', function() {
                 msgtype: "m.text",
             },
         });
+        matrixClient.pushRules = PushProcessor.rewriteDefaultRules(matrixClient.pushRules);
         pushProcessor = new PushProcessor(matrixClient);
     });
 
@@ -295,6 +297,21 @@ describe('NotificationService', function() {
         expect(actions.tweaks.highlight).toEqual(false);
     });
 
+    it('should not bing on room server ACL changes', function() {
+        testEvent = utils.mkEvent({
+            type: EventType.RoomServerAcl,
+            room: testRoomId,
+            user: "@alfred:localhost",
+            event: true,
+            content: {},
+        });
+
+        const actions = pushProcessor.actionsForEvent(testEvent);
+        expect(actions.tweaks.highlight).toBeFalsy();
+        expect(actions.tweaks.sound).toBeFalsy();
+        expect(actions.notify).toBeFalsy();
+    });
+
     // invalid
 
     it('should gracefully handle bad input.', function() {

spec/unit/relations.spec.ts

@@ -130,4 +130,49 @@ describe("Relations", function() {
             await relationsCreated;
         }
     });
+
+    it("should ignore m.replace for state events", async () => {
+        const userId = "@bob:example.com";
+        const room = new Room("room123", null, userId);
+        const relations = new Relations("m.replace", "m.room.topic", room);
+
+        // Create an instance of a state event with rel_type m.replace
+        const originalTopic = new MatrixEvent({
+            "sender": userId,
+            "type": "m.room.topic",
+            "event_id": "$orig",
+            "room_id": room.roomId,
+            "content": {
+                "topic": "orig",
+            },
+            "state_key": "",
+        });
+        const badlyEditedTopic = new MatrixEvent({
+            "sender": userId,
+            "type": "m.room.topic",
+            "event_id": "$orig",
+            "room_id": room.roomId,
+            "content": {
+                "topic": "topic",
+                "m.new_content": {
+                    "topic": "edit",
+                },
+                "m.relates_to": {
+                    "event_id": "$orig",
+                    "rel_type": "m.replace",
+                },
+            },
+            "state_key": "",
+        });
+
+        await relations.setTargetEvent(originalTopic);
+        expect(originalTopic.replacingEvent()).toBe(null);
+        expect(originalTopic.getContent().topic).toBe("orig");
+
+        await relations.addEvent(badlyEditedTopic);
+        expect(originalTopic.replacingEvent()).toBe(null);
+        expect(originalTopic.getContent().topic).toBe("orig");
+        expect(badlyEditedTopic.replacingEvent()).toBe(null);
+        expect(badlyEditedTopic.getContent().topic).toBe("topic");
+    });
 });

spec/unit/room-state.spec.js

@@ -3,6 +3,12 @@ import { makeBeaconEvent, makeBeaconInfoEvent } from "../test-utils/beacon";
 import { filterEmitCallsByEventType } from "../test-utils/emitter";
 import { RoomState, RoomStateEvent } from "../../src/models/room-state";
 import { BeaconEvent, getBeaconInfoIdentifier } from "../../src/models/beacon";
+import { EventType, RelationType } from "../../src/@types/event";
+import {
+    MatrixEvent,
+    MatrixEventEvent,
+} from "../../src/models/event";
+import { M_BEACON } from "../../src/@types/beacon";
 
 describe("RoomState", function() {
     const roomId = "!foo:bar";
@@ -717,52 +723,238 @@ describe("RoomState", function() {
         const beacon1 = makeBeaconInfoEvent(userA, roomId, {}, '$beacon1', '$beacon1');
         const beacon2 = makeBeaconInfoEvent(userB, roomId, {}, '$beacon2', '$beacon2');
 
+        const mockClient = { decryptEventIfNeeded: jest.fn() };
+
+        beforeEach(() => {
+            mockClient.decryptEventIfNeeded.mockClear();
+        });
+
         it('does nothing when state has no beacons', () => {
             const emitSpy = jest.spyOn(state, 'emit');
-            state.processBeaconEvents([makeBeaconEvent(userA, { beaconInfoId: '$beacon1' })]);
+            state.processBeaconEvents([makeBeaconEvent(userA, { beaconInfoId: '$beacon1' })], mockClient);
             expect(emitSpy).not.toHaveBeenCalled();
+            expect(mockClient.decryptEventIfNeeded).not.toHaveBeenCalled();
         });
 
         it('does nothing when there are no events', () => {
             state.setStateEvents([beacon1, beacon2]);
             const emitSpy = jest.spyOn(state, 'emit').mockClear();
-            state.processBeaconEvents([]);
+            state.processBeaconEvents([], mockClient);
             expect(emitSpy).not.toHaveBeenCalled();
+            expect(mockClient.decryptEventIfNeeded).not.toHaveBeenCalled();
         });
 
-        it('discards events for beacons that are not in state', () => {
-            const location = makeBeaconEvent(userA, {
-                beaconInfoId: 'some-other-beacon',
+        describe('without encryption', () => {
+            it('discards events for beacons that are not in state', () => {
+                const location = makeBeaconEvent(userA, {
+                    beaconInfoId: 'some-other-beacon',
+                });
+                const otherRelatedEvent = new MatrixEvent({
+                    sender: userA,
+                    type: EventType.RoomMessage,
+                    content: {
+                        ['m.relates_to']: {
+                            event_id: 'whatever',
+                        },
+                    },
+                });
+                state.setStateEvents([beacon1, beacon2]);
+                const emitSpy = jest.spyOn(state, 'emit').mockClear();
+                state.processBeaconEvents([location, otherRelatedEvent], mockClient);
+                expect(emitSpy).not.toHaveBeenCalled();
+            });
+
+            it('discards events that are not beacon type', () => {
+                // related to beacon1
+                const otherRelatedEvent = new MatrixEvent({
+                    sender: userA,
+                    type: EventType.RoomMessage,
+                    content: {
+                        ['m.relates_to']: {
+                            rel_type: RelationType.Reference,
+                            event_id: beacon1.getId(),
+                        },
+                    },
+                });
+                state.setStateEvents([beacon1, beacon2]);
+                const emitSpy = jest.spyOn(state, 'emit').mockClear();
+                state.processBeaconEvents([otherRelatedEvent], mockClient);
+                expect(emitSpy).not.toHaveBeenCalled();
+            });
+
+            it('adds locations to beacons', () => {
+                const location1 = makeBeaconEvent(userA, {
+                    beaconInfoId: '$beacon1', timestamp: Date.now() + 1,
+                });
+                const location2 = makeBeaconEvent(userA, {
+                    beaconInfoId: '$beacon1', timestamp: Date.now() + 2,
+                });
+                const location3 = makeBeaconEvent(userB, {
+                    beaconInfoId: 'some-other-beacon',
+                });
+
+                state.setStateEvents([beacon1, beacon2], mockClient);
+
+                expect(state.beacons.size).toEqual(2);
+
+                const beaconInstance = state.beacons.get(getBeaconInfoIdentifier(beacon1));
+                const addLocationsSpy = jest.spyOn(beaconInstance, 'addLocations');
+
+                state.processBeaconEvents([location1, location2, location3], mockClient);
+
+                expect(addLocationsSpy).toHaveBeenCalledTimes(2);
+                // only called with locations for beacon1
+                expect(addLocationsSpy).toHaveBeenCalledWith([location1]);
+                expect(addLocationsSpy).toHaveBeenCalledWith([location2]);
             });
-            state.setStateEvents([beacon1, beacon2]);
-            const emitSpy = jest.spyOn(state, 'emit').mockClear();
-            state.processBeaconEvents([location]);
-            expect(emitSpy).not.toHaveBeenCalled();
         });
 
-        it('adds locations to beacons', () => {
-            const location1 = makeBeaconEvent(userA, {
-                beaconInfoId: '$beacon1', timestamp: Date.now() + 1,
+        describe('with encryption', () => {
+            const beacon1RelationContent = { ['m.relates_to']: {
+                rel_type: RelationType.Reference,
+                event_id: beacon1.getId(),
+            } };
+            const relatedEncryptedEvent = new MatrixEvent({
+                sender: userA,
+                type: EventType.RoomMessageEncrypted,
+                content: beacon1RelationContent,
             });
-            const location2 = makeBeaconEvent(userA, {
-                beaconInfoId: '$beacon1', timestamp: Date.now() + 2,
+            const decryptingRelatedEvent = new MatrixEvent({
+                sender: userA,
+                type: EventType.RoomMessageEncrypted,
+                content: beacon1RelationContent,
             });
-            const location3 = makeBeaconEvent(userB, {
-                beaconInfoId: 'some-other-beacon',
+            jest.spyOn(decryptingRelatedEvent, 'isBeingDecrypted').mockReturnValue(true);
+
+            const failedDecryptionRelatedEvent = new MatrixEvent({
+                sender: userA,
+                type: EventType.RoomMessageEncrypted,
+                content: beacon1RelationContent,
+            });
+            jest.spyOn(failedDecryptionRelatedEvent, 'isDecryptionFailure').mockReturnValue(true);
+
+            it('discards events without relations', () => {
+                const unrelatedEvent = new MatrixEvent({
+                    sender: userA,
+                    type: EventType.RoomMessageEncrypted,
+                });
+                state.setStateEvents([beacon1, beacon2]);
+                const emitSpy = jest.spyOn(state, 'emit').mockClear();
+                state.processBeaconEvents([unrelatedEvent], mockClient);
+                expect(emitSpy).not.toHaveBeenCalled();
+                // discard unrelated events early
+                expect(mockClient.decryptEventIfNeeded).not.toHaveBeenCalled();
             });
 
-            state.setStateEvents([beacon1, beacon2]);
+            it('discards events for beacons that are not in state', () => {
+                const location = makeBeaconEvent(userA, {
+                    beaconInfoId: 'some-other-beacon',
+                });
+                const otherRelatedEvent = new MatrixEvent({
+                    sender: userA,
+                    type: EventType.RoomMessageEncrypted,
+                    content: {
+                        ['m.relates_to']: {
+                            rel_type: RelationType.Reference,
+                            event_id: 'whatever',
+                        },
+                    },
+                });
+                state.setStateEvents([beacon1, beacon2]);
 
-            expect(state.beacons.size).toEqual(2);
+                const beacon = state.beacons.get(getBeaconInfoIdentifier(beacon1));
+                const addLocationsSpy = jest.spyOn(beacon, 'addLocations').mockClear();
+                state.processBeaconEvents([location, otherRelatedEvent], mockClient);
+                expect(addLocationsSpy).not.toHaveBeenCalled();
+                // discard unrelated events early
+                expect(mockClient.decryptEventIfNeeded).not.toHaveBeenCalled();
+            });
 
-            const beaconInstance = state.beacons.get(getBeaconInfoIdentifier(beacon1));
-            const addLocationsSpy = jest.spyOn(beaconInstance, 'addLocations');
+            it('decrypts related events if needed', () => {
+                const location = makeBeaconEvent(userA, {
+                    beaconInfoId: beacon1.getId(),
+                });
+                state.setStateEvents([beacon1, beacon2]);
+                state.processBeaconEvents([location, relatedEncryptedEvent], mockClient);
+                // discard unrelated events early
+                expect(mockClient.decryptEventIfNeeded).toHaveBeenCalledTimes(2);
+            });
 
-            state.processBeaconEvents([location1, location2, location3]);
+            it('listens for decryption on events that are being decrypted', () => {
+                const decryptingRelatedEvent = new MatrixEvent({
+                    sender: userA,
+                    type: EventType.RoomMessageEncrypted,
+                    content: beacon1RelationContent,
+                });
+                jest.spyOn(decryptingRelatedEvent, 'isBeingDecrypted').mockReturnValue(true);
+                // spy on event.once
+                const eventOnceSpy = jest.spyOn(decryptingRelatedEvent, 'once');
 
-            expect(addLocationsSpy).toHaveBeenCalledTimes(1);
-            // only called with locations for beacon1
-            expect(addLocationsSpy).toHaveBeenCalledWith([location1, location2]);
+                state.setStateEvents([beacon1, beacon2]);
+                state.processBeaconEvents([decryptingRelatedEvent], mockClient);
+
+                // listener was added
+                expect(eventOnceSpy).toHaveBeenCalled();
+            });
+
+            it('listens for decryption on events that have decryption failure', () => {
+                const failedDecryptionRelatedEvent = new MatrixEvent({
+                    sender: userA,
+                    type: EventType.RoomMessageEncrypted,
+                    content: beacon1RelationContent,
+                });
+                jest.spyOn(failedDecryptionRelatedEvent, 'isDecryptionFailure').mockReturnValue(true);
+                // spy on event.once
+                const eventOnceSpy = jest.spyOn(decryptingRelatedEvent, 'once');
+
+                state.setStateEvents([beacon1, beacon2]);
+                state.processBeaconEvents([decryptingRelatedEvent], mockClient);
+
+                // listener was added
+                expect(eventOnceSpy).toHaveBeenCalled();
+            });
+
+            it('discard events that are not m.beacon type after decryption', () => {
+                const decryptingRelatedEvent = new MatrixEvent({
+                    sender: userA,
+                    type: EventType.RoomMessageEncrypted,
+                    content: beacon1RelationContent,
+                });
+                jest.spyOn(decryptingRelatedEvent, 'isBeingDecrypted').mockReturnValue(true);
+                state.setStateEvents([beacon1, beacon2]);
+                const beacon = state.beacons.get(getBeaconInfoIdentifier(beacon1));
+                const addLocationsSpy = jest.spyOn(beacon, 'addLocations').mockClear();
+                state.processBeaconEvents([decryptingRelatedEvent], mockClient);
+
+                // this event is a message after decryption
+                decryptingRelatedEvent.type = EventType.RoomMessage;
+                decryptingRelatedEvent.emit(MatrixEventEvent.Decrypted);
+
+                expect(addLocationsSpy).not.toHaveBeenCalled();
+            });
+
+            it('adds locations to beacons after decryption', () => {
+                const decryptingRelatedEvent = new MatrixEvent({
+                    sender: userA,
+                    type: EventType.RoomMessageEncrypted,
+                    content: beacon1RelationContent,
+                });
+                const locationEvent = makeBeaconEvent(userA, {
+                    beaconInfoId: '$beacon1', timestamp: Date.now() + 1,
+                });
+                jest.spyOn(decryptingRelatedEvent, 'isBeingDecrypted').mockReturnValue(true);
+                state.setStateEvents([beacon1, beacon2]);
+                const beacon = state.beacons.get(getBeaconInfoIdentifier(beacon1));
+                const addLocationsSpy = jest.spyOn(beacon, 'addLocations').mockClear();
+                state.processBeaconEvents([decryptingRelatedEvent], mockClient);
+
+                // update type after '''decryption'''
+                decryptingRelatedEvent.event.type = M_BEACON.name;
+                decryptingRelatedEvent.event.content = locationEvent.content;
+                decryptingRelatedEvent.emit(MatrixEventEvent.Decrypted);
+
+                expect(addLocationsSpy).toHaveBeenCalledWith([decryptingRelatedEvent]);
+            });
         });
     });
 });

spec/unit/room.spec.ts

@@ -23,6 +23,7 @@ import * as utils from "../test-utils/test-utils";
 import {
     DuplicateStrategy,
     EventStatus,
+    EventTimelineSet,
     EventType,
     JoinRule,
     MatrixEvent,
@@ -31,12 +32,13 @@ import {
     RoomEvent,
 } from "../../src";
 import { EventTimeline } from "../../src/models/event-timeline";
-import { Room } from "../../src/models/room";
+import { IWrappedReceipt, Room } from "../../src/models/room";
 import { RoomState } from "../../src/models/room-state";
 import { UNSTABLE_ELEMENT_FUNCTIONAL_USERS } from "../../src/@types/event";
 import { TestClient } from "../TestClient";
 import { emitPromise } from "../test-utils/test-utils";
-import { ThreadEvent } from "../../src/models/thread";
+import { ReceiptType } from "../../src/@types/read_receipts";
+import { Thread, ThreadEvent } from "../../src/models/thread";
 
 describe("Room", function() {
     const roomId = "!foo:bar";
@@ -1471,16 +1473,13 @@ describe("Room", function() {
                 isRoomEncrypted: function() {
                     return false;
                 },
-                http: {
-                    serverResponse,
-                    authedRequest: function() {
-                        if (this.serverResponse instanceof Error) {
-                            return Promise.reject(this.serverResponse);
-                        } else {
-                            return Promise.resolve({ chunk: this.serverResponse });
-                        }
-                    },
-                },
+                members: jest.fn().mockImplementation(() => {
+                    if (serverResponse instanceof Error) {
+                        return Promise.reject(serverResponse);
+                    } else {
+                        return Promise.resolve({ chunk: serverResponse });
+                    }
+                }),
                 store: {
                     storageResponse,
                     storedMembers: null,
@@ -1547,7 +1546,7 @@ describe("Room", function() {
             }
             expect(hasThrown).toEqual(true);
 
-            client.http.serverResponse = [memberEvent];
+            client.members.mockReturnValue({ chunk: [memberEvent] });
             await room.loadMembersIfNeeded();
             const memberA = room.getMember("@user_a:bar");
             expect(memberA.name).toEqual("User A");
@@ -1917,7 +1916,7 @@ describe("Room", function() {
                 },
             });
 
-            room.createThread(undefined, [eventWithoutARootEvent]);
+            room.createThread("$000", undefined, [eventWithoutARootEvent]);
 
             const rootEvent = new MatrixEvent({
                 event_id: "$666",
@@ -1935,7 +1934,16 @@ describe("Room", function() {
                 },
             });
 
-            expect(() => room.createThread(rootEvent, [])).not.toThrow();
+            expect(() => room.createThread(rootEvent.getId(), rootEvent, [])).not.toThrow();
+        });
+
+        it("creating thread from edited event should not conflate old versions of the event", () => {
+            const message = mkMessage();
+            const edit = mkEdit(message);
+            message.makeReplaced(edit);
+
+            const thread = room.createThread("$000", message, [], true);
+            expect(thread).toHaveLength(0);
         });
 
         it("Edits update the lastReply event", async () => {
@@ -1962,14 +1970,16 @@ describe("Room", function() {
                 },
             });
 
+            let prom = emitPromise(room, ThreadEvent.New);
             room.addLiveEvents([randomMessage, threadRoot, threadResponse]);
-            const thread = await emitPromise(room, ThreadEvent.New);
+            const thread = await prom;
 
             expect(thread.replyToEvent).toBe(threadResponse);
             expect(thread.replyToEvent.getContent().body).toBe(threadResponse.getContent().body);
 
+            prom = emitPromise(thread, ThreadEvent.Update);
             room.addLiveEvents([threadResponseEdit]);
-            await emitPromise(thread, ThreadEvent.Update);
+            await prom;
             expect(thread.replyToEvent.getContent().body).toBe(threadResponseEdit.getContent()["m.new_content"].body);
         });
 
@@ -1996,15 +2006,17 @@ describe("Room", function() {
                 },
             });
 
+            let prom = emitPromise(room, ThreadEvent.New);
             room.addLiveEvents([threadRoot, threadResponse1, threadResponse2]);
-            const thread = await emitPromise(room, ThreadEvent.New);
+            const thread = await prom;
 
             expect(thread).toHaveLength(2);
             expect(thread.replyToEvent.getId()).toBe(threadResponse2.getId());
 
+            prom = emitPromise(thread, ThreadEvent.Update);
             const threadResponse1Redaction = mkRedaction(threadResponse1);
             room.addLiveEvents([threadResponse1Redaction]);
-            await emitPromise(thread, ThreadEvent.Update);
+            await prom;
             expect(thread).toHaveLength(1);
             expect(thread.replyToEvent.getId()).toBe(threadResponse2.getId());
         });
@@ -2033,19 +2045,57 @@ describe("Room", function() {
                 },
             });
 
+            const prom = emitPromise(room, ThreadEvent.New);
             room.addLiveEvents([threadRoot, threadResponse1, threadResponse2, threadResponse2Reaction]);
-            const thread = await emitPromise(room, ThreadEvent.New);
+            const thread = await prom;
 
             expect(thread).toHaveLength(2);
             expect(thread.replyToEvent.getId()).toBe(threadResponse2.getId());
 
             const threadResponse2ReactionRedaction = mkRedaction(threadResponse2Reaction);
             room.addLiveEvents([threadResponse2ReactionRedaction]);
-            await emitPromise(thread, ThreadEvent.Update);
             expect(thread).toHaveLength(2);
             expect(thread.replyToEvent.getId()).toBe(threadResponse2.getId());
         });
 
+        it("should not decrement the length when the thread root is redacted", async () => {
+            room.client.supportsExperimentalThreads = () => true;
+
+            const threadRoot = mkMessage();
+            const threadResponse1 = mkThreadResponse(threadRoot);
+            threadResponse1.localTimestamp += 1000;
+            const threadResponse2 = mkThreadResponse(threadRoot);
+            threadResponse2.localTimestamp += 2000;
+            const threadResponse2Reaction = mkReaction(threadResponse2);
+
+            room.client.fetchRoomEvent = (eventId: string) => Promise.resolve({
+                ...threadRoot.event,
+                unsigned: {
+                    "age": 123,
+                    "m.relations": {
+                        "m.thread": {
+                            latest_event: threadResponse2.event,
+                            count: 2,
+                            current_user_participated: true,
+                        },
+                    },
+                },
+            });
+
+            let prom = emitPromise(room, ThreadEvent.New);
+            room.addLiveEvents([threadRoot, threadResponse1, threadResponse2, threadResponse2Reaction]);
+            const thread = await prom;
+
+            expect(thread).toHaveLength(2);
+            expect(thread.replyToEvent.getId()).toBe(threadResponse2.getId());
+
+            prom = emitPromise(room, ThreadEvent.Update);
+            const threadRootRedaction = mkRedaction(threadRoot);
+            room.addLiveEvents([threadRootRedaction]);
+            await prom;
+            expect(thread).toHaveLength(2);
+        });
+
         it("Redacting the lastEvent finds a new lastEvent", async () => {
             room.client.supportsExperimentalThreads = () => true;
 
@@ -2069,21 +2119,24 @@ describe("Room", function() {
                 },
             });
 
+            let prom = emitPromise(room, ThreadEvent.New);
             room.addLiveEvents([threadRoot, threadResponse1, threadResponse2]);
-            const thread = await emitPromise(room, ThreadEvent.New);
+            const thread = await prom;
 
             expect(thread).toHaveLength(2);
             expect(thread.replyToEvent.getId()).toBe(threadResponse2.getId());
 
+            prom = emitPromise(room, ThreadEvent.Update);
             const threadResponse2Redaction = mkRedaction(threadResponse2);
             room.addLiveEvents([threadResponse2Redaction]);
-            await emitPromise(thread, ThreadEvent.Update);
+            await prom;
             expect(thread).toHaveLength(1);
             expect(thread.replyToEvent.getId()).toBe(threadResponse1.getId());
 
+            prom = emitPromise(room, ThreadEvent.Update);
             const threadResponse1Redaction = mkRedaction(threadResponse1);
             room.addLiveEvents([threadResponse1Redaction]);
-            await emitPromise(thread, ThreadEvent.Update);
+            await prom;
             expect(thread).toHaveLength(0);
             expect(thread.replyToEvent.getId()).toBe(threadRoot.getId());
         });
@@ -2154,36 +2207,32 @@ describe("Room", function() {
             expect(room.eventShouldLiveIn(threadReaction2Redaction, events, roots).threadId).toBe(threadRoot.getId());
         });
 
-        it("reply to thread response and its relations&redactions should be only in thread timeline", () => {
+        it("reply to thread response and its relations&redactions should be only in main timeline", () => {
             const threadRoot = mkMessage();
             const threadResponse1 = mkThreadResponse(threadRoot);
             const reply1 = mkReply(threadResponse1);
-            const threadReaction1 = mkReaction(reply1);
-            const threadReaction2 = mkReaction(reply1);
-            const threadReaction2Redaction = mkRedaction(reply1);
+            const reaction1 = mkReaction(reply1);
+            const reaction2 = mkReaction(reply1);
+            const reaction2Redaction = mkRedaction(reply1);
 
             const roots = new Set([threadRoot.getId()]);
             const events = [
                 threadRoot,
                 threadResponse1,
                 reply1,
-                threadReaction1,
-                threadReaction2,
-                threadReaction2Redaction,
+                reaction1,
+                reaction2,
+                reaction2Redaction,
             ];
 
-            expect(room.eventShouldLiveIn(reply1, events, roots).shouldLiveInRoom).toBeFalsy();
-            expect(room.eventShouldLiveIn(reply1, events, roots).shouldLiveInThread).toBeTruthy();
-            expect(room.eventShouldLiveIn(reply1, events, roots).threadId).toBe(threadRoot.getId());
-            expect(room.eventShouldLiveIn(threadReaction1, events, roots).shouldLiveInRoom).toBeFalsy();
-            expect(room.eventShouldLiveIn(threadReaction1, events, roots).shouldLiveInThread).toBeTruthy();
-            expect(room.eventShouldLiveIn(threadReaction1, events, roots).threadId).toBe(threadRoot.getId());
-            expect(room.eventShouldLiveIn(threadReaction2, events, roots).shouldLiveInRoom).toBeFalsy();
-            expect(room.eventShouldLiveIn(threadReaction2, events, roots).shouldLiveInThread).toBeTruthy();
-            expect(room.eventShouldLiveIn(threadReaction2, events, roots).threadId).toBe(threadRoot.getId());
-            expect(room.eventShouldLiveIn(threadReaction2Redaction, events, roots).shouldLiveInRoom).toBeFalsy();
-            expect(room.eventShouldLiveIn(threadReaction2Redaction, events, roots).shouldLiveInThread).toBeTruthy();
-            expect(room.eventShouldLiveIn(threadReaction2Redaction, events, roots).threadId).toBe(threadRoot.getId());
+            expect(room.eventShouldLiveIn(reply1, events, roots).shouldLiveInRoom).toBeTruthy();
+            expect(room.eventShouldLiveIn(reply1, events, roots).shouldLiveInThread).toBeFalsy();
+            expect(room.eventShouldLiveIn(reaction1, events, roots).shouldLiveInRoom).toBeTruthy();
+            expect(room.eventShouldLiveIn(reaction1, events, roots).shouldLiveInThread).toBeFalsy();
+            expect(room.eventShouldLiveIn(reaction2, events, roots).shouldLiveInRoom).toBeTruthy();
+            expect(room.eventShouldLiveIn(reaction2, events, roots).shouldLiveInThread).toBeFalsy();
+            expect(room.eventShouldLiveIn(reaction2Redaction, events, roots).shouldLiveInRoom).toBeTruthy();
+            expect(room.eventShouldLiveIn(reaction2Redaction, events, roots).shouldLiveInThread).toBeFalsy();
         });
 
         it("reply to reply to thread root should only be in the main timeline", () => {
@@ -2205,5 +2254,70 @@ describe("Room", function() {
             expect(room.eventShouldLiveIn(reply2, events, roots).shouldLiveInRoom).toBeTruthy();
             expect(room.eventShouldLiveIn(reply2, events, roots).shouldLiveInThread).toBeFalsy();
         });
+
+        it("should aggregate relations in thread event timeline set", () => {
+            Thread.setServerSideSupport(true, true);
+            const threadRoot = mkMessage();
+            const rootReaction = mkReaction(threadRoot);
+            const threadResponse = mkThreadResponse(threadRoot);
+            const threadReaction = mkReaction(threadResponse);
+
+            const events = [
+                threadRoot,
+                rootReaction,
+                threadResponse,
+                threadReaction,
+            ];
+
+            room.addLiveEvents(events);
+
+            const thread = threadRoot.getThread();
+            expect(thread.rootEvent).toBe(threadRoot);
+
+            const rootRelations = thread.timelineSet.getRelationsForEvent(
+                threadRoot.getId(),
+                RelationType.Annotation,
+                EventType.Reaction,
+            ).getSortedAnnotationsByKey();
+            expect(rootRelations).toHaveLength(1);
+            expect(rootRelations[0][0]).toEqual(rootReaction.getRelation().key);
+            expect(rootRelations[0][1].size).toEqual(1);
+            expect(rootRelations[0][1].has(rootReaction)).toBeTruthy();
+
+            const responseRelations = thread.timelineSet.getRelationsForEvent(
+                threadResponse.getId(),
+                RelationType.Annotation,
+                EventType.Reaction,
+            ).getSortedAnnotationsByKey();
+            expect(responseRelations).toHaveLength(1);
+            expect(responseRelations[0][0]).toEqual(threadReaction.getRelation().key);
+            expect(responseRelations[0][1].size).toEqual(1);
+            expect(responseRelations[0][1].has(threadReaction)).toBeTruthy();
+        });
+    });
+
+    describe("getEventReadUpTo()", () => {
+        const client = new TestClient(userA).client;
+        const room = new Room(roomId, client, userA);
+
+        it("handles missing receipt type", () => {
+            room.getReadReceiptForUserId = (userId, ignore, receiptType) => {
+                return receiptType === ReceiptType.ReadPrivate ? { eventId: "eventId" } as IWrappedReceipt : null;
+            };
+
+            expect(room.getEventReadUpTo(userA)).toEqual("eventId");
+        });
+
+        it("prefers older receipt", () => {
+            room.getReadReceiptForUserId = (userId, ignore, receiptType) => {
+                return (receiptType === ReceiptType.Read
+                    ? { eventId: "eventId1" }
+                    : { eventId: "eventId2" }
+                    ) as IWrappedReceipt;
+            };
+            room.getUnfilteredTimelineSet = () => ({ compareEventOrdering: (event1, event2) => 1 } as EventTimelineSet);
+
+            expect(room.getEventReadUpTo(userA)).toEqual("eventId1");
+        });
     });
 });

spec/unit/sync-accumulator.spec.js

@@ -15,6 +15,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+import { ReceiptType } from "../../src/@types/read_receipts";
 import { SyncAccumulator } from "../../src/sync-accumulator";
 
 // The event body & unsigned object get frozen to assert that they don't get altered
@@ -294,10 +295,13 @@ describe("SyncAccumulator", function() {
             room_id: "!foo:bar",
             content: {
                 "$event1:localhost": {
-                    "m.read": {
+                    [ReceiptType.Read]: {
                         "@alice:localhost": { ts: 1 },
                         "@bob:localhost": { ts: 2 },
                     },
+                    [ReceiptType.ReadPrivate]: {
+                        "@dan:localhost": { ts: 4 },
+                    },
                     "some.other.receipt.type": {
                         "@should_be_ignored:localhost": { key: "val" },
                     },
@@ -309,7 +313,7 @@ describe("SyncAccumulator", function() {
             room_id: "!foo:bar",
             content: {
                 "$event2:localhost": {
-                    "m.read": {
+                    [ReceiptType.Read]: {
                         "@bob:localhost": { ts: 2 }, // clobbers event1 receipt
                         "@charlie:localhost": { ts: 3 },
                     },
@@ -337,12 +341,15 @@ describe("SyncAccumulator", function() {
             room_id: "!foo:bar",
             content: {
                 "$event1:localhost": {
-                    "m.read": {
+                    [ReceiptType.Read]: {
                         "@alice:localhost": { ts: 1 },
                     },
+                    [ReceiptType.ReadPrivate]: {
+                        "@dan:localhost": { ts: 4 },
+                    },
                 },
                 "$event2:localhost": {
-                    "m.read": {
+                    [ReceiptType.Read]: {
                         "@bob:localhost": { ts: 2 },
                         "@charlie:localhost": { ts: 3 },
                     },

spec/unit/webrtc/call.spec.ts

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import { TestClient } from '../../TestClient';
-import { MatrixCall, CallErrorCode, CallEvent } from '../../../src/webrtc/call';
+import { MatrixCall, CallErrorCode, CallEvent, supportsMatrixCall } from '../../../src/webrtc/call';
 import { SDPStreamMetadataKey, SDPStreamMetadataPurpose } from '../../../src/webrtc/callEventTypes';
 import { RoomMember } from "../../../src";
 
@@ -505,4 +505,40 @@ describe('Call', function() {
             return sender?.track?.kind === "video";
         }).track.id).toBe("video_track");
     });
+
+    describe("supportsMatrixCall", () => {
+        it("should return true when the environment is right", () => {
+            expect(supportsMatrixCall()).toBe(true);
+        });
+
+        it("should return false if window or document are undefined", () => {
+            global.window = undefined;
+            expect(supportsMatrixCall()).toBe(false);
+            global.window = prevWindow;
+            global.document = undefined;
+            expect(supportsMatrixCall()).toBe(false);
+        });
+
+        it("should return false if RTCPeerConnection throws", () => {
+            // @ts-ignore - writing to window as we are simulating browser edge-cases
+            global.window = {};
+            Object.defineProperty(global.window, "RTCPeerConnection", {
+                get: () => {
+                    throw Error("Secure mode, naaah!");
+                },
+            });
+            expect(supportsMatrixCall()).toBe(false);
+        });
+
+        it("should return false if RTCPeerConnection & RTCSessionDescription " +
+            "& RTCIceCandidate & mediaDevices are unavailable",
+        () => {
+            global.window.RTCPeerConnection = undefined;
+            global.window.RTCSessionDescription = undefined;
+            global.window.RTCIceCandidate = undefined;
+            // @ts-ignore - writing to a read-only property as we are simulating faulty browsers
+            global.navigator.mediaDevices = undefined;
+            expect(supportsMatrixCall()).toBe(false);
+        });
+    });
 });

spec/unit/webrtc/callEventHandler.spec.ts

@@ -0,0 +1,54 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { TestClient } from '../../TestClient';
+import { ClientEvent, EventType, MatrixEvent, RoomEvent } from "../../../src";
+import { CallEventHandler, CallEventHandlerEvent } from "../../../src/webrtc/callEventHandler";
+import { SyncState } from "../../../src/sync";
+
+describe("callEventHandler", () => {
+    it("should ignore a call if invite & hangup come within a single sync", () => {
+        const testClient = new TestClient();
+        const client = testClient.client;
+        client.callEventHandler = new CallEventHandler(client);
+        client.callEventHandler.start();
+
+        // Fire off call invite then hangup within a single sync
+        const callInvite = new MatrixEvent({
+            type: EventType.CallInvite,
+            content: {
+                call_id: "123",
+            },
+        });
+        client.emit(RoomEvent.Timeline, callInvite);
+
+        const callHangup = new MatrixEvent({
+            type: EventType.CallHangup,
+            content: {
+                call_id: "123",
+            },
+        });
+        client.emit(RoomEvent.Timeline, callHangup);
+
+        const incomingCallEmitted = jest.fn();
+        client.on(CallEventHandlerEvent.Incoming, incomingCallEmitted);
+
+        client.getSyncState = jest.fn().mockReturnValue(SyncState.Syncing);
+        client.emit(ClientEvent.Sync);
+
+        expect(incomingCallEmitted).not.toHaveBeenCalled();
+    });
+});

src/@types/global.d.ts

@@ -23,6 +23,7 @@ declare global {
     // use `number` as the return type in all cases for global.set{Interval,Timeout},
     // so we don't accidentally use the methods on NodeJS.Timeout - they only exist in a subset of environments.
     // The overload for clear{Interval,Timeout} is resolved as expected.
+    // We use `ReturnType<typeof setTimeout>` in the code to be agnostic of if this definition gets loaded.
     function setInterval(handler: TimerHandler, timeout: number, ...arguments: any[]): number;
     function setTimeout(handler: TimerHandler, timeout: number, ...arguments: any[]): number;
 

src/@types/read_receipts.ts

@@ -0,0 +1,21 @@
+/*
+Copyright 2022 Šimon Brandner <simon.bra.ag@gmail.com>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+export enum ReceiptType {
+    Read = "m.read",
+    FullyRead = "m.fully_read",
+    ReadPrivate = "org.matrix.msc2285.read.private"
+}

src/@types/requests.ts

@@ -17,9 +17,11 @@ limitations under the License.
 import { Callback } from "../client";
 import { IContent, IEvent } from "../models/event";
 import { Preset, Visibility } from "./partials";
-import { SearchKey } from "./search";
+import { IEventWithRoomId, SearchKey } from "./search";
 import { IRoomEventFilter } from "../filter";
 import { Direction } from "../models/event-timeline";
+import { PushRuleAction } from "./PushRules";
+import { IRoomEvent } from "../sync-accumulator";
 
 // allow camelcase as these are things that go onto the wire
 /* eslint-disable camelcase */
@@ -155,4 +157,50 @@ export interface IRelationsResponse {
     prev_batch?: string;
 }
 
+export interface IContextResponse {
+    end: string;
+    start: string;
+    state: IEventWithRoomId[];
+    events_before: IEventWithRoomId[];
+    events_after: IEventWithRoomId[];
+    event: IEventWithRoomId;
+}
+
+export interface IEventsResponse {
+    chunk: IEventWithRoomId[];
+    end: string;
+    start: string;
+}
+
+export interface INotification {
+    actions: PushRuleAction[];
+    event: IRoomEvent;
+    profile_tag?: string;
+    read: boolean;
+    room_id: string;
+    ts: number;
+}
+
+export interface INotificationsResponse {
+    next_token: string;
+    notifications: INotification[];
+}
+
+export interface IFilterResponse {
+    filter_id: string;
+}
+
+export interface ITagsResponse {
+    tags: {
+        [tagId: string]: {
+            order: number;
+        };
+    };
+}
+
+export interface IStatusResponse extends IPresenceOpts {
+    currently_active?: boolean;
+    last_active_ago?: number;
+}
+
 /* eslint-enable camelcase */

src/@types/topic.ts

@@ -0,0 +1,62 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { EitherAnd, IMessageRendering } from "matrix-events-sdk";
+
+import { UnstableValue } from "../NamespacedValue";
+
+/**
+ * Extensible topic event type based on MSC3765
+ * https://github.com/matrix-org/matrix-spec-proposals/pull/3765
+ */
+
+/**
+ * Eg
+ * {
+ *      "type": "m.room.topic,
+ *      "state_key": "",
+ *      "content": {
+ *          "topic": "All about **pizza**",
+ *          "m.topic": [{
+ *              "body": "All about **pizza**",
+ *              "mimetype": "text/plain",
+ *          }, {
+ *              "body": "All about <b>pizza</b>",
+ *              "mimetype": "text/html",
+ *          }],
+ *      }
+ * }
+ */
+
+/**
+ * The event type for an m.topic event (in content)
+ */
+export const M_TOPIC = new UnstableValue("m.topic", "org.matrix.msc3765.topic");
+
+/**
+ * The event content for an m.topic event (in content)
+ */
+export type MTopicContent = IMessageRendering[];
+
+/**
+ * The event definition for an m.topic event (in content)
+ */
+export type MTopicEvent = EitherAnd<{ [M_TOPIC.name]: MTopicContent }, { [M_TOPIC.altName]: MTopicContent }>;
+
+/**
+ * The event content for an m.room.topic event
+ */
+export type MRoomTopicEventContent = { topic: string } & MTopicEvent;

src/autodiscovery.ts

@@ -17,8 +17,6 @@ limitations under the License.
 
 /** @module auto-discovery */
 
-import { URL as NodeURL } from "url";
-
 import { IClientWellKnown, IWellKnownConfig } from "./client";
 import { logger } from './logger';
 
@@ -249,21 +247,20 @@ export class AutoDiscovery {
 
         // Step 7: Copy any other keys directly into the clientConfig. This is for
         // things like custom configuration of services.
-        Object.keys(wellknown)
-            .map((k) => {
-                if (k === "m.homeserver" || k === "m.identity_server") {
-                    // Only copy selected parts of the config to avoid overwriting
-                    // properties computed by the validation logic above.
-                    const notProps = ["error", "state", "base_url"];
-                    for (const prop of Object.keys(wellknown[k])) {
-                        if (notProps.includes(prop)) continue;
-                        clientConfig[k][prop] = wellknown[k][prop];
-                    }
-                } else {
-                    // Just copy the whole thing over otherwise
-                    clientConfig[k] = wellknown[k];
+        Object.keys(wellknown).forEach((k) => {
+            if (k === "m.homeserver" || k === "m.identity_server") {
+                // Only copy selected parts of the config to avoid overwriting
+                // properties computed by the validation logic above.
+                const notProps = ["error", "state", "base_url"];
+                for (const prop of Object.keys(wellknown[k])) {
+                    if (notProps.includes(prop)) continue;
+                    clientConfig[k][prop] = wellknown[k][prop];
                 }
-            });
+            } else {
+                // Just copy the whole thing over otherwise
+                clientConfig[k] = wellknown[k];
+            }
+        });
 
         // Step 8: Give the config to the caller (finally)
         return Promise.resolve(clientConfig);
@@ -373,16 +370,11 @@ export class AutoDiscovery {
         if (!url) return false;
 
         try {
-            // We have to try and parse the URL using the NodeJS URL
-            // library if we're on NodeJS and use the browser's URL
-            // library when we're in a browser. To accomplish this, we
-            // try the NodeJS version first and fall back to the browser.
             let parsed = null;
             try {
-                if (NodeURL) parsed = new NodeURL(url);
-                else parsed = new URL(url);
-            } catch (e) {
                 parsed = new URL(url);
+            } catch (e) {
+                logger.error("Could not parse url", e);
             }
 
             if (!parsed || !parsed.hostname) return false;
@@ -411,14 +403,14 @@ export class AutoDiscovery {
      * the following properties:
      *   raw: The JSON object returned by the server.
      *   action: One of SUCCESS, IGNORE, or FAIL_PROMPT.
-     *   reason: Relatively human readable description of what went wrong.
+     *   reason: Relatively human-readable description of what went wrong.
      *   error: The actual Error, if one exists.
      * @param {string} url The URL to fetch a JSON object from.
      * @return {Promise<object>} Resolves to the returned state.
      * @private
      */
-    private static async fetchWellKnownObject(url: string): Promise<IWellKnownConfig> {
-        return new Promise(function(resolve, reject) {
+    private static fetchWellKnownObject(url: string): Promise<IWellKnownConfig> {
+        return new Promise(function(resolve) {
             // eslint-disable-next-line
             const request = require("./matrix").getRequest();
             if (!request) throw new Error("No request library available");

src/content-helpers.ts

@@ -16,7 +16,7 @@ limitations under the License.
 
 /** @module ContentHelpers */
 
-import { REFERENCE_RELATION } from "matrix-events-sdk";
+import { isProvided, REFERENCE_RELATION } from "matrix-events-sdk";
 
 import { MBeaconEventContent, MBeaconInfoContent, MBeaconInfoEventContent } from "./@types/beacon";
 import { MsgType } from "./@types/event";
@@ -32,6 +32,7 @@ import {
     MAssetContent,
     LegacyLocationEventContent,
 } from "./@types/location";
+import { MRoomTopicEventContent, MTopicContent, M_TOPIC } from "./@types/topic";
 
 /**
  * Generates the content for a HTML Message event
@@ -190,6 +191,34 @@ export const parseLocationEvent = (wireEventContent: LocationEventWireContent):
     return makeLocationContent(fallbackText, geoUri, timestamp, description, assetType);
 };
 
+/**
+ * Topic event helpers
+ */
+export type MakeTopicContent = (
+    topic: string,
+    htmlTopic?: string,
+) => MRoomTopicEventContent;
+
+export const makeTopicContent: MakeTopicContent = (topic, htmlTopic) => {
+    const renderings = [{ body: topic, mimetype: "text/plain" }];
+    if (isProvided(htmlTopic)) {
+        renderings.push({ body: htmlTopic, mimetype: "text/html" });
+    }
+    return { topic, [M_TOPIC.name]: renderings };
+};
+
+export type TopicState = {
+    text: string;
+    html?: string;
+};
+
+export const parseTopicContent = (content: MRoomTopicEventContent): TopicState => {
+    const mtopic = M_TOPIC.findIn<MTopicContent>(content);
+    const text = mtopic?.find(r => !isProvided(r.mimetype) || r.mimetype === "text/plain")?.body ?? content.topic;
+    const html = mtopic?.find(r => r.mimetype === "text/html")?.body;
+    return { text, html };
+};
+
 /**
  * Beacon event helpers
  */

src/crypto/CrossSigning.ts

@@ -171,7 +171,7 @@ export class CrossSigningInfo {
      */
     public async isStoredInSecretStorage(secretStorage: SecretStorage): Promise<Record<string, object>> {
         // check what SSSS keys have encrypted the master key (if any)
-        const stored = await secretStorage.isStored("m.cross_signing.master", false) || {};
+        const stored = await secretStorage.isStored("m.cross_signing.master") || {};
         // then check which of those SSSS keys have also encrypted the SSK and USK
         function intersect(s: Record<string, ISecretStorageKeyInfo>) {
             for (const k of Object.keys(stored)) {
@@ -181,7 +181,7 @@ export class CrossSigningInfo {
             }
         }
         for (const type of ["self_signing", "user_signing"]) {
-            intersect(await secretStorage.isStored(`m.cross_signing.${type}`, false) || {});
+            intersect(await secretStorage.isStored(`m.cross_signing.${type}`) || {});
         }
         return Object.keys(stored).length ? stored : null;
     }

src/crypto/DeviceList.ts

@@ -95,7 +95,7 @@ export class DeviceList extends TypedEventEmitter<EmittedEvents, CryptoEventHand
     // The time the save is scheduled for
     private savePromiseTime: number = null;
     // The timer used to delay the save
-    private saveTimer: number = null;
+    private saveTimer: ReturnType<typeof setTimeout> = null;
     // True if we have fetched data from the server or loaded a non-empty
     // set of device data from the store
     private hasFetched: boolean = null;
@@ -122,7 +122,7 @@ export class DeviceList extends TypedEventEmitter<EmittedEvents, CryptoEventHand
             'readonly', [IndexedDBCryptoStore.STORE_DEVICE_DATA], (txn) => {
                 this.cryptoStore.getEndToEndDeviceData(txn, (deviceData) => {
                     this.hasFetched = Boolean(deviceData && deviceData.devices);
-                    this.devices = deviceData ? deviceData.devices : {},
+                    this.devices = deviceData ? deviceData.devices : {};
                     this.crossSigningInfo = deviceData ?
                         deviceData.crossSigningInfo || {} : {};
                     this.deviceTrackingStatus = deviceData ?
@@ -190,7 +190,7 @@ export class DeviceList extends TypedEventEmitter<EmittedEvents, CryptoEventHand
 
         let savePromise = this.savePromise;
         if (savePromise === null) {
-            savePromise = new Promise((resolve, reject) => {
+            savePromise = new Promise((resolve) => {
                 this.resolveSavePromise = resolve;
             });
             this.savePromise = savePromise;
@@ -309,10 +309,10 @@ export class DeviceList extends TypedEventEmitter<EmittedEvents, CryptoEventHand
      */
     private getDevicesFromStore(userIds: string[]): DeviceInfoMap {
         const stored: DeviceInfoMap = {};
-        userIds.map((u) => {
+        userIds.forEach((u) => {
             stored[u] = {};
             const devices = this.getStoredDevicesForUser(u) || [];
-            devices.map(function(dev) {
+            devices.forEach(function(dev) {
                 stored[u][dev.deviceId] = dev;
             });
         });
@@ -942,7 +942,7 @@ async function updateStoredDeviceKeysForUser(
 async function storeDeviceKeys(
     olmDevice: OlmDevice,
     userStore: Record<string, DeviceInfo>,
-    deviceResult: any, // TODO types
+    deviceResult: IDownloadKeyResult["device_keys"]["user_id"]["device_id"],
 ): Promise<boolean> {
     if (!deviceResult.keys) {
         // no keys?

src/crypto/OlmDevice.ts

@@ -909,12 +909,12 @@ export class OlmDevice {
         await this.cryptoStore.storeEndToEndSessionProblem(deviceKey, type, fixed);
     }
 
-    public async sessionMayHaveProblems(deviceKey: string, timestamp: number): Promise<IProblem> {
-        return await this.cryptoStore.getEndToEndSessionProblem(deviceKey, timestamp);
+    public sessionMayHaveProblems(deviceKey: string, timestamp: number): Promise<IProblem> {
+        return this.cryptoStore.getEndToEndSessionProblem(deviceKey, timestamp);
     }
 
-    public async filterOutNotifiedErrorDevices(devices: IOlmDevice[]): Promise<IOlmDevice[]> {
-        return await this.cryptoStore.filterOutNotifiedErrorDevices(devices);
+    public filterOutNotifiedErrorDevices(devices: IOlmDevice[]): Promise<IOlmDevice[]> {
+        return this.cryptoStore.filterOutNotifiedErrorDevices(devices);
     }
 
     // Outbound group session

src/crypto/OutgoingRoomKeyRequestManager.ts

@@ -78,7 +78,7 @@ export enum RoomKeyRequestState {
 export class OutgoingRoomKeyRequestManager {
     // handle for the delayed call to sendOutgoingRoomKeyRequests. Non-null
     // if the callback has been set, or if it is still running.
-    private sendOutgoingRoomKeyRequestsTimer: number = null;
+    private sendOutgoingRoomKeyRequestsTimer: ReturnType<typeof setTimeout> = null;
 
     // sanity check to ensure that we don't end up with two concurrent runs
     // of sendOutgoingRoomKeyRequests
@@ -189,9 +189,7 @@ export class OutgoingRoomKeyRequestManager {
                             // in state ROOM_KEY_REQUEST_STATES.SENT, so we must have
                             // raced with another tab to mark the request cancelled.
                             // Try again, to make sure the request is resent.
-                            return await this.queueRoomKeyRequest(
-                                requestBody, recipients, resend,
-                            );
+                            return this.queueRoomKeyRequest(requestBody, recipients, resend);
                         }
 
                         // We don't want to wait for the timer, so we send it

src/crypto/SecretStorage.ts

@@ -329,7 +329,7 @@ export class SecretStorage {
             // encoded, since this is how a key would normally be stored.
             if (encInfo.passthrough) return encodeBase64(decryption.get_private_key());
 
-            return await decryption.decrypt(encInfo);
+            return decryption.decrypt(encInfo);
         } finally {
             if (decryption && decryption.free) decryption.free();
         }
@@ -339,21 +339,15 @@ export class SecretStorage {
      * Check if a secret is stored on the server.
      *
      * @param {string} name the name of the secret
-     * @param {boolean} checkKey check if the secret is encrypted by a trusted key
      *
      * @return {object?} map of key name to key info the secret is encrypted
      *     with, or null if it is not present or not encrypted with a trusted
      *     key
      */
-    public async isStored(name: string, checkKey: boolean): Promise<Record<string, ISecretStorageKeyInfo> | null> {
+    public async isStored(name: string): Promise<Record<string, ISecretStorageKeyInfo> | null> {
         // check if secret exists
         const secretInfo = await this.accountDataAdapter.getAccountDataFromServer<ISecretInfo>(name);
-        if (!secretInfo) return null;
-        if (!secretInfo.encrypted) {
-            return null;
-        }
-
-        if (checkKey === undefined) checkKey = true;
+        if (!secretInfo?.encrypted) return null;
 
         const ret = {};
 
@@ -598,11 +592,11 @@ export class SecretStorage {
 
         if (keys[keyId].algorithm === SECRET_STORAGE_ALGORITHM_V1_AES) {
             const decryption = {
-                encrypt: async function(secret: string): Promise<IEncryptedPayload> {
-                    return await encryptAES(secret, privateKey, name);
+                encrypt: function(secret: string): Promise<IEncryptedPayload> {
+                    return encryptAES(secret, privateKey, name);
                 },
-                decrypt: async function(encInfo: IEncryptedPayload): Promise<string> {
-                    return await decryptAES(encInfo, privateKey, name);
+                decrypt: function(encInfo: IEncryptedPayload): Promise<string> {
+                    return decryptAES(encInfo, privateKey, name);
                 },
             };
             return [keyId, decryption];

src/crypto/aes.ts

@@ -250,7 +250,7 @@ async function deriveKeysBrowser(key: Uint8Array, name: string): Promise<[Crypto
         ['sign', 'verify'],
     );
 
-    return await Promise.all([aesProm, hmacProm]);
+    return Promise.all([aesProm, hmacProm]);
 }
 
 export function encryptAES(data: string, key: Uint8Array, name: string, ivStr?: string): Promise<IEncryptedPayload> {

src/crypto/algorithms/olm.ts

@@ -70,7 +70,7 @@ class OlmEncryption extends EncryptionAlgorithm {
             return Promise.resolve();
         }
 
-        this.prepPromise = this.crypto.downloadKeys(roomMembers).then((res) => {
+        this.prepPromise = this.crypto.downloadKeys(roomMembers).then(() => {
             return this.crypto.ensureOlmSessionsForUsers(roomMembers);
         }).then(() => {
             this.sessionPrepared = true;
@@ -144,7 +144,7 @@ class OlmEncryption extends EncryptionAlgorithm {
             }
         }
 
-        return await Promise.all(promises).then(() => encryptedContent);
+        return Promise.all(promises).then(() => encryptedContent);
     }
 }
 
@@ -261,7 +261,7 @@ class OlmDecryption extends DecryptionAlgorithm {
      *
      * @return {string} payload, if decrypted successfully.
      */
-    private async decryptMessage(theirDeviceIdentityKey: string, message: IMessage): Promise<string> {
+    private decryptMessage(theirDeviceIdentityKey: string, message: IMessage): Promise<string> {
         // This is a wrapper that serialises decryptions of prekey messages, because
         // otherwise we race between deciding we have no active sessions for the message
         // and creating a new one, which we can only do once because it removes the OTK.
@@ -274,7 +274,7 @@ class OlmDecryption extends DecryptionAlgorithm {
             });
             // we want the error, but don't propagate it to the next decryption
             this.olmDevice.olmPrekeyPromise = myPromise.catch(() => {});
-            return await myPromise;
+            return myPromise;
         }
     }
 

src/crypto/backup.ts

@@ -132,18 +132,18 @@ export class BackupManager {
         if (!Algorithm) {
             throw new Error("Unknown backup algorithm: " + info.algorithm);
         }
-        if (!(typeof info.auth_data === "object")) {
+        if (typeof info.auth_data !== "object") {
             throw new Error("Invalid backup data returned");
         }
         return Algorithm.checkBackupVersion(info);
     }
 
-    public static async makeAlgorithm(info: IKeyBackupInfo, getKey: GetKey): Promise<BackupAlgorithm> {
+    public static makeAlgorithm(info: IKeyBackupInfo, getKey: GetKey): Promise<BackupAlgorithm> {
         const Algorithm = algorithmsByName[info.algorithm];
         if (!Algorithm) {
             throw new Error("Unknown backup algorithm");
         }
-        return await Algorithm.init(info.auth_data, getKey);
+        return Algorithm.init(info.auth_data, getKey);
     }
 
     public async enableKeyBackup(info: IKeyBackupInfo): Promise<void> {
@@ -375,9 +375,7 @@ export class BackupManager {
             );
             if (device) {
                 sigInfo.device = device;
-                sigInfo.deviceTrust = await this.baseApis.checkDeviceTrust(
-                    this.baseApis.getUserId(), sigInfo.deviceId,
-                );
+                sigInfo.deviceTrust = this.baseApis.checkDeviceTrust(this.baseApis.getUserId(), sigInfo.deviceId);
                 try {
                     await verifySignature(
                         this.baseApis.crypto.olmDevice,
@@ -430,7 +428,7 @@ export class BackupManager {
             // requests from different clients hitting the server all at
             // the same time when a new key is sent
             const delay = Math.random() * maxDelay;
-            await sleep(delay, undefined);
+            await sleep(delay);
             let numFailures = 0; // number of consecutive failures
             for (;;) {
                 if (!this.algorithm) {
@@ -464,7 +462,7 @@ export class BackupManager {
                 }
                 if (numFailures) {
                     // exponential backoff if we have failures
-                    await sleep(1000 * Math.pow(2, Math.min(numFailures - 1, 4)), undefined);
+                    await sleep(1000 * Math.pow(2, Math.min(numFailures - 1, 4)));
                 }
             }
         } finally {
@@ -476,8 +474,8 @@ export class BackupManager {
      * Take some e2e keys waiting to be backed up and send them
      * to the backup.
      *
-     * @param {integer} limit Maximum number of keys to back up
-     * @returns {integer} Number of sessions backed up
+     * @param {number} limit Maximum number of keys to back up
+     * @returns {number} Number of sessions backed up
      */
     public async backupPendingKeys(limit: number): Promise<number> {
         const sessions = await this.baseApis.crypto.cryptoStore.getSessionsNeedingBackup(limit);
@@ -495,7 +493,7 @@ export class BackupManager {
                 rooms[roomId] = { sessions: {} };
             }
 
-            const sessionData = await this.baseApis.crypto.olmDevice.exportInboundGroupSession(
+            const sessionData = this.baseApis.crypto.olmDevice.exportInboundGroupSession(
                 session.senderKey, session.sessionId, session.sessionData,
             );
             sessionData.algorithm = MEGOLM_ALGORITHM;
@@ -779,15 +777,15 @@ export class Aes256 implements BackupAlgorithm {
 
     public get untrusted() { return false; }
 
-    async encryptSession(data: Record<string, any>): Promise<any> {
+    public encryptSession(data: Record<string, any>): Promise<any> {
         const plainText: Record<string, any> = Object.assign({}, data);
         delete plainText.session_id;
         delete plainText.room_id;
         delete plainText.first_known_index;
-        return await encryptAES(JSON.stringify(plainText), this.key, data.session_id);
+        return encryptAES(JSON.stringify(plainText), this.key, data.session_id);
     }
 
-    async decryptSessions(sessions: Record<string, IKeyBackupSession>): Promise<IMegolmSessionData[]> {
+    public async decryptSessions(sessions: Record<string, IKeyBackupSession>): Promise<IMegolmSessionData[]> {
         const keys: IMegolmSessionData[] = [];
 
         for (const [sessionId, sessionData] of Object.entries(sessions)) {
@@ -802,7 +800,7 @@ export class Aes256 implements BackupAlgorithm {
         return keys;
     }
 
-    async keyMatches(key: Uint8Array): Promise<boolean> {
+    public async keyMatches(key: Uint8Array): Promise<boolean> {
         if (this.authData.mac) {
             const { mac } = await calculateKeyCheck(key, this.authData.iv);
             return this.authData.mac.replace(/=+$/g, '') === mac.replace(/=+/g, '');

src/crypto/dehydration.ts

@@ -61,11 +61,13 @@ export class DehydrationManager {
     private key: Uint8Array;
     private keyInfo: {[props: string]: any};
     private deviceDisplayName: string;
+
     constructor(private readonly crypto: Crypto) {
         this.getDehydrationKeyFromCache();
     }
-    async getDehydrationKeyFromCache(): Promise<void> {
-        return await this.crypto.cryptoStore.doTxn(
+
+    public getDehydrationKeyFromCache(): Promise<void> {
+        return this.crypto.cryptoStore.doTxn(
             'readonly',
             [IndexedDBCryptoStore.STORE_ACCOUNT],
             (txn) => {
@@ -93,7 +95,7 @@ export class DehydrationManager {
     }
 
     /** set the key, and queue periodic dehydration to the server in the background */
-    async setKeyAndQueueDehydration(
+    public async setKeyAndQueueDehydration(
         key: Uint8Array, keyInfo: {[props: string]: any} = {},
         deviceDisplayName: string = undefined,
     ): Promise<void> {
@@ -104,7 +106,7 @@ export class DehydrationManager {
         }
     }
 
-    async setKey(
+    public async setKey(
         key: Uint8Array, keyInfo: {[props: string]: any} = {},
         deviceDisplayName: string = undefined,
     ): Promise<boolean> {
@@ -148,7 +150,7 @@ export class DehydrationManager {
     }
 
     /** returns the device id of the newly created dehydrated device */
-    async dehydrateDevice(): Promise<string> {
+    public async dehydrateDevice(): Promise<string> {
         if (this.inProgress) {
             logger.log("Dehydration already in progress -- not starting new dehydration");
             return;

src/crypto/index.ts

@@ -58,7 +58,7 @@ import { keyFromPassphrase } from './key_passphrase';
 import { decodeRecoveryKey, encodeRecoveryKey } from './recoverykey';
 import { VerificationRequest } from "./verification/request/VerificationRequest";
 import { InRoomChannel, InRoomRequests } from "./verification/request/InRoomChannel";
-import { ToDeviceChannel, ToDeviceRequests } from "./verification/request/ToDeviceChannel";
+import { ToDeviceChannel, ToDeviceRequests, Request } from "./verification/request/ToDeviceChannel";
 import { IllegalMethod } from "./verification/IllegalMethod";
 import { KeySignatureUploadError } from "../errors";
 import { calculateKeyCheck, decryptAES, encryptAES } from './aes';
@@ -309,7 +309,7 @@ export class Crypto extends TypedEventEmitter<CryptoEvent, CryptoEventHandlerMap
 
     private oneTimeKeyCount: number;
     private needsNewFallback: boolean;
-    private fallbackCleanup?: number; // setTimeout ID
+    private fallbackCleanup?: ReturnType<typeof setTimeout>;
 
     /**
      * Cryptography bits
@@ -402,7 +402,7 @@ export class Crypto extends TypedEventEmitter<CryptoEvent, CryptoEventHandlerMap
 
             // try to get key from app
             if (this.baseApis.cryptoCallbacks && this.baseApis.cryptoCallbacks.getBackupKey) {
-                return await this.baseApis.cryptoCallbacks.getBackupKey();
+                return this.baseApis.cryptoCallbacks.getBackupKey();
             }
 
             throw new Error("Unable to get private key");
@@ -690,7 +690,7 @@ export class Crypto extends TypedEventEmitter<CryptoEvent, CryptoEventHandlerMap
 
             // Cross-sign own device
             const device = this.deviceList.getStoredDevice(this.userId, this.deviceId);
-            const deviceSignature = await crossSigningInfo.signDevice(this.userId, device) as ISignedKey;
+            const deviceSignature = await crossSigningInfo.signDevice(this.userId, device);
             builder.addKeySignature(this.userId, this.deviceId, deviceSignature);
 
             // Sign message key backup with cross-signing master key
@@ -1026,7 +1026,7 @@ export class Crypto extends TypedEventEmitter<CryptoEvent, CryptoEventHandlerMap
             const decodedBackupKey = new Uint8Array(olmlib.decodeBase64(
                 fixedBackupKey || sessionBackupKey,
             ));
-            await builder.addSessionBackupPrivateKeyToCache(decodedBackupKey);
+            builder.addSessionBackupPrivateKeyToCache(decodedBackupKey);
         } else if (this.backupManager.getKeyBackupEnabled()) {
             // key backup is enabled but we don't have a session backup key in SSSS: see if we have one in
             // the cache or the user can provide one, and if so, write it to SSSS
@@ -1076,11 +1076,8 @@ export class Crypto extends TypedEventEmitter<CryptoEvent, CryptoEventHandlerMap
         return this.secretStorage.get(name);
     }
 
-    public isSecretStored(
-        name: string,
-        checkKey?: boolean,
-    ): Promise<Record<string, ISecretStorageKeyInfo> | null> {
-        return this.secretStorage.isStored(name, checkKey);
+    public isSecretStored(name: string): Promise<Record<string, ISecretStorageKeyInfo> | null> {
+        return this.secretStorage.isStored(name);
     }
 
     public requestSecret(name: string, devices: string[]): ISecretRequest {
@@ -1423,6 +1420,25 @@ export class Crypto extends TypedEventEmitter<CryptoEvent, CryptoEventHandlerMap
         }
     }
 
+    /**
+     * Check whether one of our own devices is cross-signed by our
+     * user's stored keys, regardless of whether we trust those keys yet.
+     *
+     * @param {string} deviceId The ID of the device to check
+     *
+     * @returns {boolean} true if the device is cross-signed
+     */
+    public checkIfOwnDeviceCrossSigned(deviceId: string): boolean {
+        const device = this.deviceList.getStoredDevice(this.userId, deviceId);
+        const userCrossSigning = this.deviceList.getStoredCrossSigningForUser(this.userId);
+        return userCrossSigning.checkDeviceTrust(
+            userCrossSigning,
+            device,
+            false,
+            true,
+        ).isCrossSigningVerified();
+    }
+
     /*
      * Event handler for DeviceList's userNewDevices event
      */
@@ -2302,8 +2318,8 @@ export class Crypto extends TypedEventEmitter<CryptoEvent, CryptoEventHandlerMap
         userId: string,
         deviceId: string,
         transactionId: string = null,
-    ): any { // TODO types
-        let request;
+    ): VerificationBase<any, any> {
+        let request: Request;
         if (transactionId) {
             request = this.toDeviceVerificationRequests.getRequestBySenderAndTxnId(userId, transactionId);
             if (!request) {
@@ -2871,7 +2887,7 @@ export class Crypto extends TypedEventEmitter<CryptoEvent, CryptoEventHandlerMap
         } else {
             const content = event.getWireContent();
             const alg = this.getRoomDecryptor(event.getRoomId(), content.algorithm);
-            return await alg.decryptEvent(event);
+            return alg.decryptEvent(event);
         }
     }
 

src/crypto/key_passphrase.ts

@@ -38,7 +38,7 @@ interface IKey {
     iterations: number;
 }
 
-export async function keyFromAuthData(authData: IAuthData, password: string): Promise<Uint8Array> {
+export function keyFromAuthData(authData: IAuthData, password: string): Promise<Uint8Array> {
     if (!global.Olm) {
         throw new Error("Olm is not available");
     }
@@ -50,7 +50,7 @@ export async function keyFromAuthData(authData: IAuthData, password: string): Pr
         );
     }
 
-    return await deriveKey(
+    return deriveKey(
         password, authData.private_key_salt,
         authData.private_key_iterations,
         authData.private_key_bits || DEFAULT_BITSIZE,

src/crypto/recoverykey.ts

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import bs58 from 'bs58';
+import * as bs58 from 'bs58';
 
 // picked arbitrarily but to try & avoid clashing with any bitcoin ones
 // (which are also base58 encoded, but bitcoin's involve a lot more hashing)

src/crypto/store/indexeddb-crypto-store-backend.ts

@@ -873,7 +873,7 @@ export class Backend implements CryptoStore {
 
     public doTxn<T>(
         mode: Mode,
-        stores: Iterable<string>,
+        stores: string | string[],
         func: (txn: IDBTransaction) => T,
         log: PrefixedLogger = logger,
     ): Promise<T> {

src/crypto/verification/Base.ts

@@ -55,7 +55,7 @@ export class VerificationBase<
     private cancelled = false;
     private _done = false;
     private promise: Promise<void> = null;
-    private transactionTimeoutTimer: number = null;
+    private transactionTimeoutTimer: ReturnType<typeof setTimeout> = null;
     protected expectedEvent: string;
     private resolve: () => void;
     private reject: (e: Error | MatrixEvent) => void;

src/crypto/verification/SAS.ts

@@ -193,6 +193,7 @@ function calculateMAC(olmSAS: OlmSAS, method: string) {
 }
 
 const calculateKeyAgreement = {
+    // eslint-disable-next-line @typescript-eslint/naming-convention
     "curve25519-hkdf-sha256": function(sas: SAS, olmSAS: OlmSAS, bytes: number): Uint8Array {
         const ourInfo = `${sas.baseApis.getUserId()}|${sas.baseApis.deviceId}|`
               + `${sas.ourSASPubKey}|`;

src/crypto/verification/request/InRoomChannel.ts

@@ -184,7 +184,7 @@ export class InRoomChannel implements IVerificationChannel {
      * @param {boolean} isLiveEvent whether this is an even received through sync or not
      * @returns {Promise} a promise that resolves when any requests as an answer to the passed-in event are sent.
      */
-    public async handleEvent(event: MatrixEvent, request: VerificationRequest, isLiveEvent = false): Promise<void> {
+    public handleEvent(event: MatrixEvent, request: VerificationRequest, isLiveEvent = false): Promise<void> {
         // prevent processing the same event multiple times, as under
         // some circumstances Room.timeline can get emitted twice for the same event
         if (request.hasEventId(event.getId())) {
@@ -221,8 +221,7 @@ export class InRoomChannel implements IVerificationChannel {
         const isRemoteEcho = !!event.getUnsigned().transaction_id;
         const isSentByUs = event.getSender() === this.client.getUserId();
 
-        return await request.handleEvent(
-            type, event, isLiveEvent, isRemoteEcho, isSentByUs);
+        return request.handleEvent(type, event, isLiveEvent, isRemoteEcho, isSentByUs);
     }
 
     /**

src/crypto/verification/request/VerificationRequest.ts

@@ -95,7 +95,7 @@ export class VerificationRequest<
     private eventsByUs = new Map<string, MatrixEvent>();
     private eventsByThem = new Map<string, MatrixEvent>();
     private _observeOnly = false;
-    private timeoutTimer: number = null;
+    private timeoutTimer: ReturnType<typeof setTimeout> = null;
     private _accepting = false;
     private _declining = false;
     private verifierHasFinished = false;
@@ -796,8 +796,7 @@ export class VerificationRequest<
     }
 
     private setupTimeout(phase: Phase): void {
-        const shouldTimeout = !this.timeoutTimer && !this.observeOnly &&
-            phase === PHASE_REQUESTED;
+        const shouldTimeout = !this.timeoutTimer && !this.observeOnly && phase === PHASE_REQUESTED;
 
         if (shouldTimeout) {
             this.timeoutTimer = setTimeout(this.cancelOnTimeout, this.timeout);
@@ -814,15 +813,15 @@ export class VerificationRequest<
         }
     }
 
-    private cancelOnTimeout = () => {
+    private cancelOnTimeout = async () => {
         try {
             if (this.initiatedByMe) {
-                this.cancel({
+                await this.cancel({
                     reason: "Other party didn't accept in time",
                     code: "m.timeout",
                 });
             } else {
-                this.cancel({
+                await this.cancel({
                     reason: "User didn't accept in time",
                     code: "m.timeout",
                 });

src/http-api.ts

@@ -30,7 +30,7 @@ import type { Request as _Request, CoreOptions } from "request";
 import * as callbacks from "./realtime-callbacks";
 import { IUploadOpts } from "./@types/requests";
 import { IAbortablePromise, IUsageLimit } from "./@types/partials";
-import { IDeferred } from "./utils";
+import { IDeferred, sleep } from "./utils";
 import { Callback } from "./client";
 import * as utils from "./utils";
 import { logger } from './logger';
@@ -1055,7 +1055,7 @@ interface IErrorJson extends Partial<IUsageLimit> {
  * @prop {string} name Same as MatrixError.errcode but with a default unknown string.
  * @prop {string} message The Matrix 'error' value, e.g. "Missing token."
  * @prop {Object} data The raw Matrix error JSON used to construct this object.
- * @prop {integer} httpStatus The numeric HTTP status code given
+ * @prop {number} httpStatus The numeric HTTP status code given
  */
 export class MatrixError extends Error {
     public readonly errcode: string;
@@ -1105,7 +1105,7 @@ export class AbortError extends Error {
  * @return {any} the result of the network operation
  * @throws {ConnectionError} If after maxAttempts the callback still throws ConnectionError
  */
-export async function retryNetworkOperation<T>(maxAttempts: number, callback: () => T): Promise<T> {
+export async function retryNetworkOperation<T>(maxAttempts: number, callback: () => Promise<T>): Promise<T> {
     let attempts = 0;
     let lastConnectionError = null;
     while (attempts < maxAttempts) {
@@ -1114,9 +1114,9 @@ export async function retryNetworkOperation<T>(maxAttempts: number, callback: ()
                 const timeout = 1000 * Math.pow(2, attempts);
                 logger.log(`network operation failed ${attempts} times,` +
                     ` retrying in ${timeout}ms...`);
-                await new Promise(r => setTimeout(r, timeout));
+                await sleep(timeout);
             }
-            return await callback();
+            return callback();
         } catch (err) {
             if (err instanceof ConnectionError) {
                 attempts += 1;

src/index.ts

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import request from "request";
+import * as request from "request";
 
 import * as matrixcs from "./matrix";
 import * as utils from "./utils";

src/interactive-auth.ts

@@ -203,6 +203,8 @@ export class InteractiveAuth {
     private chosenFlow: IFlow = null;
     private currentStage: string = null;
 
+    private emailAttempt = 1;
+
     // if we are currently trying to submit an auth dict (which includes polling)
     // the promise the will resolve/reject when it completes
     private submitPromise: Promise<void> = null;
@@ -408,6 +410,34 @@ export class InteractiveAuth {
         this.emailSid = sid;
     }
 
+    /**
+     * Requests a new email token and sets the email sid for the validation session
+     */
+    public requestEmailToken = async () => {
+        if (!this.requestingEmailToken) {
+            logger.trace("Requesting email token. Attempt: " + this.emailAttempt);
+            // If we've picked a flow with email auth, we send the email
+            // now because we want the request to fail as soon as possible
+            // if the email address is not valid (ie. already taken or not
+            // registered, depending on what the operation is).
+            this.requestingEmailToken = true;
+            try {
+                const requestTokenResult = await this.requestEmailTokenCallback(
+                    this.inputs.emailAddress,
+                    this.clientSecret,
+                    this.emailAttempt++,
+                    this.data.session,
+                );
+                this.emailSid = requestTokenResult.sid;
+                logger.trace("Email token request succeeded");
+            } finally {
+                this.requestingEmailToken = false;
+            }
+        } else {
+            logger.warn("Could not request email token: Already requesting");
+        }
+    };
+
     /**
      * Fire off a request, and either resolve the promise, or call
      * startAuthStage.
@@ -458,24 +488,9 @@ export class InteractiveAuth {
                 return;
             }
 
-            if (
-                !this.emailSid &&
-                !this.requestingEmailToken &&
-                this.chosenFlow.stages.includes(AuthType.Email)
-            ) {
-                // If we've picked a flow with email auth, we send the email
-                // now because we want the request to fail as soon as possible
-                // if the email address is not valid (ie. already taken or not
-                // registered, depending on what the operation is).
-                this.requestingEmailToken = true;
+            if (!this.emailSid && this.chosenFlow.stages.includes(AuthType.Email)) {
                 try {
-                    const requestTokenResult = await this.requestEmailTokenCallback(
-                        this.inputs.emailAddress,
-                        this.clientSecret,
-                        1, // TODO: Multiple send attempts?
-                        this.data.session,
-                    );
-                    this.emailSid = requestTokenResult.sid;
+                    await this.requestEmailToken();
                     // NB. promise is not resolved here - at some point, doRequest
                     // will be called again and if the user has jumped through all
                     // the hoops correctly, auth will be complete and the request
@@ -491,8 +506,6 @@ export class InteractiveAuth {
                     // send the email, for whatever reason.
                     this.attemptAuthDeferred.reject(e);
                     this.attemptAuthDeferred = null;
-                } finally {
-                    this.requestingEmailToken = false;
                 }
             }
         }

src/matrix.ts

@@ -17,8 +17,7 @@ limitations under the License.
 import { MemoryCryptoStore } from "./crypto/store/memory-crypto-store";
 import { MemoryStore } from "./store/memory";
 import { MatrixScheduler } from "./scheduler";
-import { MatrixClient } from "./client";
-import { ICreateClientOpts } from "./client";
+import { MatrixClient, ICreateClientOpts } from "./client";
 import { DeviceTrustLevel } from "./crypto/CrossSigning";
 import { ISecretStorageKeyInfo } from "./crypto/api";
 
@@ -153,7 +152,7 @@ export interface ICryptoCallbacks {
 export function createClient(opts: ICreateClientOpts | string) {
     if (typeof opts === "string") {
         opts = {
-            "baseUrl": opts as string,
+            "baseUrl": opts,
         };
     }
     opts.request = opts.request || requestInstance;

src/models/beacon.ts

@@ -54,7 +54,7 @@ export class Beacon extends TypedEventEmitter<Exclude<BeaconEvent, BeaconEvent.N
     public readonly roomId: string;
     private _beaconInfo: BeaconInfoState;
     private _isLive: boolean;
-    private livenessWatchInterval: number;
+    private livenessWatchInterval: ReturnType<typeof setInterval>;
     private _latestLocationState: BeaconLocationState | undefined;
 
     constructor(

src/models/event-timeline-set.ts

@@ -28,7 +28,6 @@ import { EventType, RelationType } from "../@types/event";
 import { RoomState } from "./room-state";
 import { TypedEventEmitter } from "./typed-event-emitter";
 
-// var DEBUG = false;
 const DEBUG = true;
 
 let debuglog: (...args: any[]) => void;
@@ -852,14 +851,13 @@ export class EventTimelineSet extends TypedEventEmitter<EmittedEvents, EventTime
         }
         let relationsWithEventType = relationsWithRelType[eventType];
 
-        let relatesToEvent: MatrixEvent;
         if (!relationsWithEventType) {
             relationsWithEventType = relationsWithRelType[eventType] = new Relations(
                 relationType,
                 eventType,
                 this.room,
             );
-            relatesToEvent = this.findEventById(relatesToEventId) || this.room.getPendingEvent(relatesToEventId);
+            const relatesToEvent = this.findEventById(relatesToEventId) || this.room.getPendingEvent(relatesToEventId);
             if (relatesToEvent) {
                 relationsWithEventType.setTargetEvent(relatesToEvent);
             }

src/models/event.ts

@@ -1043,7 +1043,7 @@ export class MatrixEvent extends TypedEventEmitter<EmittedEvents, MatrixEventHan
      *   caused a change in the actual visibility of this event, either by making it
      *   visible (if it was hidden), by making it hidden (if it was visible) or by
      *   changing the reason (if it was hidden).
-     * @param visibilityEvent event holding a hide/unhide payload, or nothing
+     * @param visibilityChange event holding a hide/unhide payload, or nothing
      *   if the event is being reset to its original visibility (presumably
      *   by a visibility event being redacted).
      */
@@ -1065,9 +1065,7 @@ export class MatrixEvent extends TypedEventEmitter<EmittedEvents, MatrixEventHan
                     reason: reason,
                 });
             }
-            if (change) {
-                this.emit(MatrixEventEvent.VisibilityChange, this, visible);
-            }
+            this.emit(MatrixEventEvent.VisibilityChange, this, visible);
         }
     }
 
@@ -1112,23 +1110,21 @@ export class MatrixEvent extends TypedEventEmitter<EmittedEvents, MatrixEventHan
         }
         this.event.unsigned.redacted_because = redactionEvent.event as IEvent;
 
-        let key;
-        for (key in this.event) {
-            if (!this.event.hasOwnProperty(key)) {
-                continue;
-            }
-            if (!REDACT_KEEP_KEYS.has(key)) {
+        for (const key in this.event) {
+            if (this.event.hasOwnProperty(key) && !REDACT_KEEP_KEYS.has(key)) {
                 delete this.event[key];
             }
         }
 
+        // If the event is encrypted prune the decrypted bits
+        if (this.isEncrypted()) {
+            this.clearEvent = null;
+        }
+
         const keeps = REDACT_KEEP_CONTENT_MAP[this.getType()] || {};
         const content = this.getContent();
-        for (key in content) {
-            if (!content.hasOwnProperty(key)) {
-                continue;
-            }
-            if (!keeps[key]) {
+        for (const key in content) {
+            if (content.hasOwnProperty(key) && !keeps[key]) {
                 delete content[key];
             }
         }
@@ -1303,8 +1299,7 @@ export class MatrixEvent extends TypedEventEmitter<EmittedEvents, MatrixEventHan
     public isRelation(relType: string = undefined): boolean {
         // Relation info is lifted out of the encrypted content when sent to
         // encrypted rooms, so we have to check `getWireContent` for this.
-        const content = this.getWireContent();
-        const relation = content && content["m.relates_to"];
+        const relation = this.getWireContent()?.["m.relates_to"];
         return relation && relation.rel_type && relation.event_id &&
             ((relType && relation.rel_type === relType) || !relType);
     }
@@ -1336,6 +1331,10 @@ export class MatrixEvent extends TypedEventEmitter<EmittedEvents, MatrixEventHan
         if (this.isRedacted() && newEvent) {
             return;
         }
+        // don't allow state events to be replaced using this mechanism as per MSC2676
+        if (this.isState()) {
+            return;
+        }
         if (this._replacingEvent !== newEvent) {
             this._replacingEvent = newEvent;
             this.emit(MatrixEventEvent.Replaced, this);
@@ -1586,7 +1585,7 @@ const REDACT_KEEP_KEYS = new Set([
     'content', 'unsigned', 'origin_server_ts',
 ]);
 
-// a map from event type to the .content keys we keep when an event is redacted
+// a map from state event type to the .content keys we keep when an event is redacted
 const REDACT_KEEP_CONTENT_MAP = {
     [EventType.RoomMember]: { 'membership': 1 },
     [EventType.RoomCreate]: { 'creator': 1 },

src/models/room-state.ts

@@ -22,15 +22,13 @@ import { RoomMember } from "./room-member";
 import { logger } from '../logger';
 import * as utils from "../utils";
 import { EventType } from "../@types/event";
-import { MatrixEvent } from "./event";
+import { MatrixEvent, MatrixEventEvent } from "./event";
 import { MatrixClient } from "../client";
 import { GuestAccess, HistoryVisibility, IJoinRuleEventContent, JoinRule } from "../@types/partials";
 import { TypedEventEmitter } from "./typed-event-emitter";
-import { Beacon, BeaconEvent, BeaconEventHandlerMap } from "./beacon";
+import { Beacon, BeaconEvent, BeaconEventHandlerMap, getBeaconInfoIdentifier, BeaconIdentifier } from "./beacon";
 import { TypedReEmitter } from "../ReEmitter";
-import { M_BEACON_INFO } from "../@types/beacon";
-import { getBeaconInfoIdentifier } from "./beacon";
-import { BeaconIdentifier } from "..";
+import { M_BEACON, M_BEACON_INFO } from "../@types/beacon";
 
 // possible statuses for out-of-band member loading
 enum OobStatus {
@@ -411,7 +409,7 @@ export class RoomState extends TypedEventEmitter<EmittedEvents, EventHandlerMap>
         this.emit(RoomStateEvent.Update, this);
     }
 
-    public processBeaconEvents(events: MatrixEvent[]): void {
+    public processBeaconEvents(events: MatrixEvent[], matrixClient: MatrixClient): void {
         if (
             !events.length ||
             // discard locations if we have no beacons
@@ -420,24 +418,38 @@ export class RoomState extends TypedEventEmitter<EmittedEvents, EventHandlerMap>
             return;
         }
 
-        // names are confusing here
-        // a Beacon is the parent event, but event type is 'm.beacon_info'
-        // a location is the 'child' related to the Beacon, but the event type is 'm.beacon'
-        // group locations by beaconInfo event id
-        const locationEventsByBeaconEventId = events.reduce<Record<string, MatrixEvent[]>>((acc, event) => {
-            const beaconInfoEventId = event.getRelation()?.event_id;
-            if (!acc[beaconInfoEventId]) {
-                acc[beaconInfoEventId] = [];
-            }
-            acc[beaconInfoEventId].push(event);
-            return acc;
-        }, {});
+        const beaconByEventIdDict: Record<string, Beacon> =
+            [...this.beacons.values()].reduce((dict, beacon) => ({ ...dict, [beacon.beaconInfoId]: beacon }), {});
 
-        Object.entries(locationEventsByBeaconEventId).forEach(([beaconInfoEventId, events]) => {
-            const beacon = [...this.beacons.values()].find(beacon => beacon.beaconInfoId === beaconInfoEventId);
+        const processBeaconRelation = (beaconInfoEventId: string, event: MatrixEvent): void => {
+            if (!M_BEACON.matches(event.getType())) {
+                return;
+            }
+
+            const beacon = beaconByEventIdDict[beaconInfoEventId];
 
             if (beacon) {
-                beacon.addLocations(events);
+                beacon.addLocations([event]);
+            }
+        };
+
+        events.forEach((event: MatrixEvent) => {
+            const relatedToEventId = event.getRelation()?.event_id;
+            // not related to a beacon we know about
+            // discard
+            if (!beaconByEventIdDict[relatedToEventId]) {
+                return;
+            }
+
+            matrixClient.decryptEventIfNeeded(event);
+
+            if (event.isBeingDecrypted() || event.isDecryptionFailure()) {
+                // add an event listener for once the event is decrypted.
+                event.once(MatrixEventEvent.Decrypted, async () => {
+                    processBeaconRelation(relatedToEventId, event);
+                });
+            } else {
+                processBeaconRelation(relatedToEventId, event);
             }
         });
     }

src/models/room.ts

@@ -22,7 +22,7 @@ import { EventTimelineSet, DuplicateStrategy } from "./event-timeline-set";
 import { Direction, EventTimeline } from "./event-timeline";
 import { getHttpUriForMxc } from "../content-repo";
 import * as utils from "../utils";
-import { defer, normalize } from "../utils";
+import { normalize } from "../utils";
 import { IEvent, IThreadBundledRelationship, MatrixEvent, MatrixEventEvent, MatrixEventHandlerMap } from "./event";
 import { EventStatus } from "./event-status";
 import { RoomMember } from "./room-member";
@@ -46,8 +46,9 @@ import {
     FILTER_RELATED_BY_SENDERS,
     ThreadFilterType,
 } from "./thread";
-import { Method } from "../http-api";
 import { TypedEventEmitter } from "./typed-event-emitter";
+import { ReceiptType } from "../@types/read_receipts";
+import { IStateEventWithRoomId } from "../@types/search";
 
 // These constants are used as sane defaults when the homeserver doesn't support
 // the m.room_versions capability. In practice, KNOWN_SAFE_ROOM_VERSION should be
@@ -55,10 +56,10 @@ import { TypedEventEmitter } from "./typed-event-emitter";
 // room versions which are considered okay for people to run without being asked
 // to upgrade (ie: "stable"). Eventually, we should remove these when all homeservers
 // return an m.room_versions capability.
-const KNOWN_SAFE_ROOM_VERSION = '6';
-const SAFE_ROOM_VERSIONS = ['1', '2', '3', '4', '5', '6'];
+const KNOWN_SAFE_ROOM_VERSION = '9';
+const SAFE_ROOM_VERSIONS = ['1', '2', '3', '4', '5', '6', '7', '8', '9'];
 
-function synthesizeReceipt(userId: string, event: MatrixEvent, receiptType: string): MatrixEvent {
+function synthesizeReceipt(userId: string, event: MatrixEvent, receiptType: ReceiptType): MatrixEvent {
     // console.log("synthesizing receipt for "+event.getId());
     return new MatrixEvent({
         content: {
@@ -93,13 +94,13 @@ interface IReceipt {
     ts: number;
 }
 
-interface IWrappedReceipt {
+export interface IWrappedReceipt {
     eventId: string;
     data: IReceipt;
 }
 
 interface ICachedReceipt {
-    type: string;
+    type: ReceiptType;
     userId: string;
     data: IReceipt;
 }
@@ -108,7 +109,7 @@ type ReceiptCache = {[eventId: string]: ICachedReceipt[]};
 
 interface IReceiptContent {
     [eventId: string]: {
-        [type: string]: {
+        [key in ReceiptType]: {
             [userId: string]: IReceipt;
         };
     };
@@ -214,8 +215,6 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
     private getTypeWarning = false;
     private getVersionWarning = false;
     private membersPromise?: Promise<boolean>;
-    // Map from threadId to pending Thread instance created by createThreadFetchRoot
-    private threadPromises = new Map<string, Promise<Thread>>();
 
     // XXX: These should be read-only
     /**
@@ -266,7 +265,7 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
     /**
      * @experimental
      */
-    public threads = new Map<string, Thread>();
+    private threads = new Map<string, Thread>();
     public lastThread: Thread;
 
     /**
@@ -788,16 +787,9 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
         }
     }
 
-    private async loadMembersFromServer(): Promise<IEvent[]> {
+    private async loadMembersFromServer(): Promise<IStateEventWithRoomId[]> {
         const lastSyncToken = this.client.store.getSyncToken();
-        const queryString = utils.encodeParams({
-            not_membership: "leave",
-            at: lastSyncToken,
-        });
-        const path = utils.encodeUri("/rooms/$roomId/members?" + queryString,
-            { $roomId: this.roomId });
-        const http = this.client.http;
-        const response = await http.authedRequest<{ chunk: IEvent[] }>(undefined, Method.Get, path);
+        const response = await this.client.members(this.roomId, undefined, "leave", lastSyncToken);
         return response.chunk;
     }
 
@@ -806,12 +798,13 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
         let fromServer = false;
         let rawMembersEvents = await this.client.store.getOutOfBandMembers(this.roomId);
         // If the room is encrypted, we always fetch members from the server at
-        // least once, in case the latest state wasn't persisted properly.  Note
+        // least once, in case the latest state wasn't persisted properly. Note
         // that this function is only called once (unless loading the members
         // fails), since loadMembersIfNeeded always returns this.membersPromise
         // if set, which will be the result of the first (successful) call.
         if (rawMembersEvents === null ||
-            (this.client.isCryptoEnabled() && this.client.isRoomEncrypted(this.roomId))) {
+            (this.client.isCryptoEnabled() && this.client.isRoomEncrypted(this.roomId))
+        ) {
             fromServer = true;
             rawMembersEvents = await this.loadMembersFromServer();
             logger.log(`LL: got ${rawMembersEvents.length} ` +
@@ -857,7 +850,7 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
             if (fromServer) {
                 const oobMembers = this.currentState.getMembers()
                     .filter((m) => m.isOutOfBand())
-                    .map((m) => m.events.member.event as IEvent);
+                    .map((m) => m.events.member.event as IStateEventWithRoomId);
                 logger.log(`LL: telling store to write ${oobMembers.length}`
                     + ` members for room ${this.roomId}`);
                 const store = this.client.store;
@@ -1132,14 +1125,14 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
      * The aliases returned by this function may not necessarily
      * still point to this room.
      * @return {array} The room's alias as an array of strings
+     * @deprecated this uses m.room.aliases events, replaced by Room::getAltAliases()
      */
     public getAliases(): string[] {
         const aliasStrings: string[] = [];
 
         const aliasEvents = this.currentState.getStateEvents(EventType.RoomAliases);
         if (aliasEvents) {
-            for (let i = 0; i < aliasEvents.length; ++i) {
-                const aliasEvent = aliasEvents[i];
+            for (const aliasEvent of aliasEvents) {
                 if (Array.isArray(aliasEvent.getContent().aliases)) {
                     const filteredAliases = aliasEvent.getContent<{ aliases: string[] }>().aliases.filter(a => {
                         if (typeof(a) !== "string") return false;
@@ -1149,7 +1142,7 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
                         // It's probably valid by here.
                         return true;
                     });
-                    Array.prototype.push.apply(aliasStrings, filteredAliases);
+                    aliasStrings.push(...filteredAliases);
                 }
             }
         }
@@ -1214,9 +1207,7 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
      * @experimental
      */
     public getThread(eventId: string): Thread {
-        return this.getThreads().find(thread => {
-            return thread.id === eventId;
-        });
+        return this.threads.get(eventId);
     }
 
     /**
@@ -1530,7 +1521,7 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
             }
 
             if (!this.getThread(rootEvent.getId())) {
-                this.createThread(rootEvent, [], true);
+                this.createThread(rootEvent.getId(), rootEvent, [], true);
             }
         }
 
@@ -1612,16 +1603,6 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
             };
         }
 
-        // A reply directly to a thread response is shown as part of the thread only, this is to provide a better
-        // experience when communicating with users using clients without full threads support
-        if (parentEvent?.isThreadRelation) {
-            return {
-                shouldLiveInRoom: false,
-                shouldLiveInThread: true,
-                threadId: parentEvent.threadRootId,
-            };
-        }
-
         // We've exhausted all scenarios, can safely assume that this event should live in the room timeline only
         return {
             shouldLiveInRoom: true,
@@ -1636,58 +1617,14 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
         return threadId ? this.getThread(threadId) : null;
     }
 
-    public async createThreadFetchRoot(
-        threadId: string,
-        events?: MatrixEvent[],
-        toStartOfTimeline?: boolean,
-    ): Promise<Thread | null> {
+    private addThreadedEvents(threadId: string, events: MatrixEvent[], toStartOfTimeline = false): void {
         let thread = this.getThread(threadId);
 
-        if (!thread) {
-            const deferred = defer<Thread | null>();
-            this.threadPromises.set(threadId, deferred.promise);
-
-            let rootEvent = this.findEventById(threadId);
-            // If the rootEvent does not exist in the local stores, then fetch it from the server.
-            try {
-                const eventData = await this.client.fetchRoomEvent(this.roomId, threadId);
-                const mapper = this.client.getEventMapper();
-                rootEvent = mapper(eventData); // will merge with existing event object if such is known
-            } catch (e) {
-                logger.error("Failed to fetch thread root to construct thread with", e);
-            } finally {
-                this.threadPromises.delete(threadId);
-                // The root event might be not be visible to the person requesting it.
-                // If it wasn't fetched successfully the thread will work in "limited" mode and won't
-                // benefit from all the APIs a homeserver can provide to enhance the thread experience
-                thread = this.createThread(rootEvent, events, toStartOfTimeline);
-                if (thread) {
-                    rootEvent?.setThread(thread);
-                }
-                deferred.resolve(thread);
-            }
-        }
-
-        return thread;
-    }
-
-    private async addThreadedEvents(events: MatrixEvent[], threadId: string, toStartOfTimeline = false): Promise<void> {
-        let thread = this.getThread(threadId);
-        if (this.threadPromises.has(threadId)) {
-            thread = await this.threadPromises.get(threadId);
-        }
-
-        events = events.filter(e => e.getId() !== threadId); // filter out any root events
-
         if (thread) {
-            for (const event of events) {
-                await thread.addEvent(event, toStartOfTimeline);
-            }
+            thread.addEvents(events, toStartOfTimeline);
         } else {
-            thread = await this.createThreadFetchRoot(threadId, events, toStartOfTimeline);
-        }
-
-        if (thread) {
+            const rootEvent = this.findEventById(threadId) ?? events.find(e => e.getId() === threadId);
+            thread = this.createThread(threadId, rootEvent, events, toStartOfTimeline);
             this.emit(ThreadEvent.Update, thread);
         }
     }
@@ -1696,75 +1633,77 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
      * Adds events to a thread's timeline. Will fire "Thread.update"
      * @experimental
      */
-    public async processThreadedEvents(events: MatrixEvent[], toStartOfTimeline: boolean): Promise<unknown> {
+    public processThreadedEvents(events: MatrixEvent[], toStartOfTimeline: boolean): void {
         events.forEach(this.applyRedaction);
 
         const eventsByThread: { [threadId: string]: MatrixEvent[] } = {};
         for (const event of events) {
-            const { threadId } = this.eventShouldLiveIn(event);
-            if (!eventsByThread[threadId]) {
+            const { threadId, shouldLiveInThread } = this.eventShouldLiveIn(event);
+            if (shouldLiveInThread && !eventsByThread[threadId]) {
                 eventsByThread[threadId] = [];
             }
-            eventsByThread[threadId].push(event);
+            eventsByThread[threadId]?.push(event);
         }
 
-        return Promise.all(Object.entries(eventsByThread).map(([threadId, events]) => (
-            this.addThreadedEvents(events, threadId, toStartOfTimeline)
-        )));
+        Object.entries(eventsByThread).map(([threadId, threadEvents]) => (
+            this.addThreadedEvents(threadId, threadEvents, toStartOfTimeline)
+        ));
     }
 
     public createThread(
+        threadId: string,
         rootEvent: MatrixEvent | undefined,
         events: MatrixEvent[] = [],
         toStartOfTimeline: boolean,
-    ): Thread | undefined {
+    ): Thread {
         if (rootEvent) {
             const tl = this.getTimelineForEvent(rootEvent.getId());
             const relatedEvents = tl?.getTimelineSet().getAllRelationsEventForEvent(rootEvent.getId());
-            if (relatedEvents) {
-                events = events.concat(relatedEvents);
+            if (relatedEvents?.length) {
+                // Include all relations of the root event, given it'll be visible in both timelines,
+                // except `m.replace` as that will already be applied atop the event using `MatrixEvent::makeReplaced`
+                events = events.concat(relatedEvents.filter(e => !e.isRelation(RelationType.Replace)));
             }
         }
 
-        const thread = new Thread(rootEvent, {
+        const thread = new Thread(threadId, rootEvent, {
             initialEvents: events,
             room: this,
             client: this.client,
         });
+
         // If we managed to create a thread and figure out its `id` then we can use it
-        if (thread.id) {
-            this.threads.set(thread.id, thread);
-            this.reEmitter.reEmit(thread, [
-                ThreadEvent.Update,
-                ThreadEvent.NewReply,
-                RoomEvent.Timeline,
-                RoomEvent.TimelineReset,
-            ]);
+        this.threads.set(thread.id, thread);
+        this.reEmitter.reEmit(thread, [
+            ThreadEvent.Update,
+            ThreadEvent.NewReply,
+            RoomEvent.Timeline,
+            RoomEvent.TimelineReset,
+        ]);
 
-            if (!this.lastThread || this.lastThread.rootEvent?.localTimestamp < rootEvent?.localTimestamp) {
-                this.lastThread = thread;
-            }
-
-            this.emit(ThreadEvent.New, thread, toStartOfTimeline);
-
-            if (this.threadsReady) {
-                this.threadsTimelineSets.forEach(timelineSet => {
-                    if (thread.rootEvent) {
-                        if (Thread.hasServerSideSupport) {
-                            timelineSet.addLiveEvent(thread.rootEvent);
-                        } else {
-                            timelineSet.addEventToTimeline(
-                                thread.rootEvent,
-                                timelineSet.getLiveTimeline(),
-                                toStartOfTimeline,
-                            );
-                        }
-                    }
-                });
-            }
-
-            return thread;
+        if (!this.lastThread || this.lastThread.rootEvent?.localTimestamp < rootEvent?.localTimestamp) {
+            this.lastThread = thread;
         }
+
+        this.emit(ThreadEvent.New, thread, toStartOfTimeline);
+
+        if (this.threadsReady) {
+            this.threadsTimelineSets.forEach(timelineSet => {
+                if (thread.rootEvent) {
+                    if (Thread.hasServerSideSupport) {
+                        timelineSet.addLiveEvent(thread.rootEvent);
+                    } else {
+                        timelineSet.addEventToTimeline(
+                            thread.rootEvent,
+                            timelineSet.getLiveTimeline(),
+                            toStartOfTimeline,
+                        );
+                    }
+                }
+            });
+        }
+
+        return thread;
     }
 
     private applyRedaction = (event: MatrixEvent): void => {
@@ -1856,7 +1795,7 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
         // Don't synthesize RR for m.room.redaction as this causes the RR to go missing.
         if (event.sender && event.getType() !== EventType.RoomRedaction) {
             this.addReceipt(synthesizeReceipt(
-                event.sender.userId, event, "m.read",
+                event.sender.userId, event, ReceiptType.Read,
             ), true);
 
             // Any live events from a user could be taken as implicit
@@ -2205,33 +2144,30 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
         }
 
         const threadRoots = this.findThreadRoots(events);
-        const threadInfos = events.map(e => this.eventShouldLiveIn(e, events, threadRoots));
         const eventsByThread: { [threadId: string]: MatrixEvent[] } = {};
 
-        for (let i = 0; i < events.length; i++) {
+        for (const event of events) {
             // TODO: We should have a filter to say "only add state event types X Y Z to the timeline".
-            this.processLiveEvent(events[i]);
+            this.processLiveEvent(event);
 
             const {
                 shouldLiveInRoom,
                 shouldLiveInThread,
                 threadId,
-            } = threadInfos[i];
+            } = this.eventShouldLiveIn(event, events, threadRoots);
 
-            if (shouldLiveInThread) {
-                if (!eventsByThread[threadId]) {
-                    eventsByThread[threadId] = [];
-                }
-                eventsByThread[threadId].push(events[i]);
+            if (shouldLiveInThread && !eventsByThread[threadId]) {
+                eventsByThread[threadId] = [];
             }
+            eventsByThread[threadId]?.push(event);
 
             if (shouldLiveInRoom) {
-                this.addLiveEvent(events[i], duplicateStrategy, fromCache);
+                this.addLiveEvent(event, duplicateStrategy, fromCache);
             }
         }
 
         Object.entries(eventsByThread).forEach(([threadId, threadEvents]) => {
-            this.addThreadedEvents(threadEvents, threadId, false);
+            this.addThreadedEvents(threadId, threadEvents, false);
         });
     }
 
@@ -2381,14 +2317,23 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
      */
     public getUsersReadUpTo(event: MatrixEvent): string[] {
         return this.getReceiptsForEvent(event).filter(function(receipt) {
-            return receipt.type === "m.read";
+            return [ReceiptType.Read, ReceiptType.ReadPrivate].includes(receipt.type);
         }).map(function(receipt) {
             return receipt.userId;
         });
     }
 
-    public getReadReceiptForUserId(userId: string, ignoreSynthesized = false): IWrappedReceipt | null {
-        const [realReceipt, syntheticReceipt] = this.receipts["m.read"]?.[userId] ?? [];
+    /**
+     * Gets the latest receipt for a given user in the room
+     * @param userId The id of the user for which we want the receipt
+     * @param ignoreSynthesized Whether to ignore synthesized receipts or not
+     * @param receiptType Optional. The type of the receipt we want to get
+     * @returns the latest receipts of the chosen type for the chosen user
+     */
+    public getReadReceiptForUserId(
+        userId: string, ignoreSynthesized = false, receiptType = ReceiptType.Read,
+    ): IWrappedReceipt | null {
+        const [realReceipt, syntheticReceipt] = this.receipts[receiptType]?.[userId] ?? [];
         if (ignoreSynthesized) {
             return realReceipt;
         }
@@ -2406,8 +2351,25 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
      * @return {String} ID of the latest event that the given user has read, or null.
      */
     public getEventReadUpTo(userId: string, ignoreSynthesized = false): string | null {
-        const readReceipt = this.getReadReceiptForUserId(userId, ignoreSynthesized);
-        return readReceipt?.eventId ?? null;
+        const timelineSet = this.getUnfilteredTimelineSet();
+        const publicReadReceipt = this.getReadReceiptForUserId(userId, ignoreSynthesized, ReceiptType.Read);
+        const privateReadReceipt = this.getReadReceiptForUserId(userId, ignoreSynthesized, ReceiptType.ReadPrivate);
+
+        // If we have both, compare them
+        let comparison: number | undefined;
+        if (publicReadReceipt?.eventId && privateReadReceipt?.eventId) {
+            comparison = timelineSet.compareEventOrdering(publicReadReceipt?.eventId, privateReadReceipt?.eventId);
+        }
+
+        // If we didn't get a comparison try to compare the ts of the receipts
+        if (!comparison) comparison = publicReadReceipt?.data?.ts - privateReadReceipt?.data?.ts;
+
+        // The public receipt is more likely to drift out of date so the private
+        // one has precedence
+        if (!comparison) return privateReadReceipt?.eventId ?? publicReadReceipt?.eventId ?? null;
+
+        // If public read receipt is older, return the private one
+        return (comparison < 0) ? privateReadReceipt?.eventId : publicReadReceipt?.eventId;
     }
 
     /**
@@ -2560,7 +2522,7 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
                     }
                     this.receiptCacheByEventId[eventId].push({
                         userId: userId,
-                        type: receiptType,
+                        type: receiptType as ReceiptType,
                         data: receipt,
                     });
                 });
@@ -2573,9 +2535,9 @@ export class Room extends TypedEventEmitter<EmittedEvents, RoomEventHandlerMap>
      * client the fact that we've sent one.
      * @param {string} userId The user ID if the receipt sender
      * @param {MatrixEvent} e The event that is to be acknowledged
-     * @param {string} receiptType The type of receipt
+     * @param {ReceiptType} receiptType The type of receipt
      */
-    public addLocalEchoReceipt(userId: string, e: MatrixEvent, receiptType: string): void {
+    public addLocalEchoReceipt(userId: string, e: MatrixEvent, receiptType: ReceiptType): void {
         this.addReceipt(synthesizeReceipt(userId, e, receiptType), true);
     }
 

src/models/thread.ts

@@ -70,16 +70,21 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
     public readonly room: Room;
     public readonly client: MatrixClient;
 
-    public initialEventsFetched = false;
-
-    public readonly id: string;
+    public initialEventsFetched = !Thread.hasServerSideSupport;
 
     constructor(
-        public readonly rootEvent: MatrixEvent | undefined,
+        public readonly id: string,
+        public rootEvent: MatrixEvent | undefined,
         opts: IThreadOpts,
     ) {
         super();
 
+        if (!opts?.room) {
+            // Logging/debugging for https://github.com/vector-im/element-web/issues/22141
+            // Hope is that we end up with a more obvious stack trace.
+            throw new Error("element-web#22141: A thread requires a room in order to function");
+        }
+
         this.room = opts.room;
         this.client = opts.client;
         this.timelineSet = new EventTimelineSet(this.room, {
@@ -99,12 +104,33 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
         this.room.on(RoomEvent.LocalEchoUpdated, this.onEcho);
         this.timelineSet.on(RoomEvent.Timeline, this.onEcho);
 
-        // If we weren't able to find the root event, it's probably missing,
-        // and we define the thread ID from one of the thread relation
-        this.id = rootEvent?.getId() ?? opts?.initialEvents?.find(event => event.isThreadRelation)?.relationEventId;
-        this.initialiseThread(this.rootEvent);
+        if (opts.initialEvents) {
+            this.addEvents(opts.initialEvents, false);
+        }
+        // even if this thread is thought to be originating from this client, we initialise it as we may be in a
+        // gappy sync and a thread around this event may already exist.
+        this.initialiseThread();
 
-        opts?.initialEvents?.forEach(event => this.addEvent(event, false));
+        this.rootEvent?.setThread(this);
+    }
+
+    private async fetchRootEvent(): Promise<void> {
+        this.rootEvent = this.room.findEventById(this.id);
+        // If the rootEvent does not exist in the local stores, then fetch it from the server.
+        try {
+            const eventData = await this.client.fetchRoomEvent(this.roomId, this.id);
+            const mapper = this.client.getEventMapper();
+            this.rootEvent = mapper(eventData); // will merge with existing event object if such is known
+        } catch (e) {
+            logger.error("Failed to fetch thread root to construct thread with", e);
+        }
+
+        // The root event might be not be visible to the person requesting it.
+        // If it wasn't fetched successfully the thread will work in "limited" mode and won't
+        // benefit from all the APIs a homeserver can provide to enhance the thread experience
+        this.rootEvent?.setThread(this);
+
+        this.emit(ThreadEvent.Update, this);
     }
 
     public static setServerSideSupport(hasServerSideSupport: boolean, useStable: boolean): void {
@@ -119,6 +145,7 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
     private onBeforeRedaction = (event: MatrixEvent, redaction: MatrixEvent) => {
         if (event?.isRelation(THREAD_RELATION_TYPE.name) &&
             this.room.eventShouldLiveIn(event).threadId === this.id &&
+            event.getId() !== this.id && // the root event isn't counted in the length so ignore this redaction
             !redaction.status // only respect it when it succeeds
         ) {
             this.replyCount--;
@@ -179,6 +206,11 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
         }
     }
 
+    public addEvents(events: MatrixEvent[], toStartOfTimeline: boolean): void {
+        events.forEach(ev => this.addEvent(ev, toStartOfTimeline, false));
+        this.emit(ThreadEvent.Update, this);
+    }
+
     /**
      * Add an event to the thread and updates
      * the tail/root references if needed
@@ -186,43 +218,60 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
      * @param event The event to add
      * @param {boolean} toStartOfTimeline whether the event is being added
      * to the start (and not the end) of the timeline.
+     * @param {boolean} emit whether to emit the Update event if the thread was updated or not.
      */
-    public async addEvent(event: MatrixEvent, toStartOfTimeline: boolean): Promise<void> {
+    public addEvent(event: MatrixEvent, toStartOfTimeline: boolean, emit = true): void {
+        event.setThread(this);
+
+        if (!this._currentUserParticipated && event.getSender() === this.client.getUserId()) {
+            this._currentUserParticipated = true;
+        }
+
+        if ([RelationType.Annotation, RelationType.Replace].includes(event.getRelation()?.rel_type as RelationType)) {
+            // Apply annotations and replace relations to the relations of the timeline only
+            this.timelineSet.setRelationsTarget(event);
+            this.timelineSet.aggregateRelations(event);
+            return;
+        }
+
         // Add all incoming events to the thread's timeline set when there's  no server support
         if (!Thread.hasServerSideSupport) {
             // all the relevant membership info to hydrate events with a sender
             // is held in the main room timeline
             // We want to fetch the room state from there and pass it down to this thread
             // timeline set to let it reconcile an event with its relevant RoomMember
-
-            event.setThread(this);
             this.addEventToTimeline(event, toStartOfTimeline);
 
-            await this.client.decryptEventIfNeeded(event, {});
+            this.client.decryptEventIfNeeded(event, {});
         } else if (!toStartOfTimeline &&
             this.initialEventsFetched &&
-            event.localTimestamp > this.lastReply().localTimestamp
+            event.localTimestamp > this.lastReply()?.localTimestamp
         ) {
-            await this.fetchEditsWhereNeeded(event);
+            this.fetchEditsWhereNeeded(event);
             this.addEventToTimeline(event, false);
         }
 
-        if (!this._currentUserParticipated && event.getSender() === this.client.getUserId()) {
-            this._currentUserParticipated = true;
-        }
-
         // If no thread support exists we want to count all thread relation
         // added as a reply. We can't rely on the bundled relationships count
-        if (!Thread.hasServerSideSupport && event.isRelation(THREAD_RELATION_TYPE.name)) {
+        if ((!Thread.hasServerSideSupport || !this.rootEvent) && event.isRelation(THREAD_RELATION_TYPE.name)) {
             this.replyCount++;
         }
 
-        this.emit(ThreadEvent.Update, this);
+        if (emit) {
+            this.emit(ThreadEvent.Update, this);
+        }
     }
 
-    private initialiseThread(rootEvent: MatrixEvent | undefined): void {
-        const bundledRelationship = rootEvent
-            ?.getServerAggregatedRelation<IThreadBundledRelationship>(THREAD_RELATION_TYPE.name);
+    private getRootEventBundledRelationship(rootEvent = this.rootEvent): IThreadBundledRelationship {
+        return rootEvent?.getServerAggregatedRelation<IThreadBundledRelationship>(THREAD_RELATION_TYPE.name);
+    }
+
+    private async initialiseThread(): Promise<void> {
+        let bundledRelationship = this.getRootEventBundledRelationship();
+        if (Thread.hasServerSideSupport && !bundledRelationship) {
+            await this.fetchRootEvent();
+            bundledRelationship = this.getRootEventBundledRelationship();
+        }
 
         if (Thread.hasServerSideSupport && bundledRelationship) {
             this.replyCount = bundledRelationship.count;
@@ -235,6 +284,8 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
 
             this.fetchEditsWhereNeeded(event);
         }
+
+        this.emit(ThreadEvent.Update, this);
     }
 
     // XXX: Workaround for https://github.com/matrix-org/matrix-spec-proposals/pull/2676/files#r827240084
@@ -252,24 +303,10 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
         }));
     }
 
-    public async fetchInitialEvents(): Promise<{
-        originalEvent: MatrixEvent;
-        events: MatrixEvent[];
-        nextBatch?: string;
-        prevBatch?: string;
-    } | null> {
-        if (!Thread.hasServerSideSupport) {
-            this.initialEventsFetched = true;
-            return null;
-        }
-
-        try {
-            const response = await this.fetchEvents();
-            this.initialEventsFetched = true;
-            return response;
-        } catch (e) {
-            return null;
-        }
+    public async fetchInitialEvents(): Promise<void> {
+        if (this.initialEventsFetched) return;
+        await this.fetchEvents();
+        this.initialEventsFetched = true;
     }
 
     private setEventMetadata(event: MatrixEvent): void {
@@ -318,7 +355,7 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
      * A getter for the last event added to the thread
      */
     public get replyToEvent(): MatrixEvent {
-        return this.lastEvent;
+        return this.lastEvent ?? this.lastReply();
     }
 
     public get events(): MatrixEvent[] {
@@ -337,7 +374,7 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
         return this.timelineSet.getLiveTimeline();
     }
 
-    public async fetchEvents(opts: IRelationsRequestOpts = { limit: 20 }): Promise<{
+    public async fetchEvents(opts: IRelationsRequestOpts = { limit: 20, direction: Direction.Backward }): Promise<{
         originalEvent: MatrixEvent;
         events: MatrixEvent[];
         nextBatch?: string;
@@ -369,7 +406,7 @@ export class Thread extends TypedEventEmitter<EmittedEvents, EventHandlerMap> {
             return this.client.decryptEventIfNeeded(event);
         }));
 
-        const prependEvents = !opts.direction || opts.direction === Direction.Backward;
+        const prependEvents = (opts.direction ?? Direction.Backward) === Direction.Backward;
 
         this.timelineSet.addEventsToTimeline(
             events,

src/models/user.ts

@@ -27,8 +27,6 @@ export enum UserEvent {
     Presence = "User.presence",
     CurrentlyActive = "User.currentlyActive",
     LastPresenceTs = "User.lastPresenceTs",
-    /* @deprecated */
-    _UnstableStatusMessage = "User.unstable_statusMessage",
 }
 
 export type UserEventHandlerMap = {
@@ -37,7 +35,6 @@ export type UserEventHandlerMap = {
     [UserEvent.Presence]: (event: MatrixEvent | undefined, user: User) => void;
     [UserEvent.CurrentlyActive]: (event: MatrixEvent | undefined, user: User) => void;
     [UserEvent.LastPresenceTs]: (event: MatrixEvent | undefined, user: User) => void;
-    [UserEvent._UnstableStatusMessage]: (user: User) => void;
 };
 
 export class User extends TypedEventEmitter<UserEvent, UserEventHandlerMap> {
@@ -59,8 +56,6 @@ export class User extends TypedEventEmitter<UserEvent, UserEventHandlerMap> {
             presence: null,
             profile: null,
         };
-    // eslint-disable-next-line camelcase
-    public unstable_statusMessage = "";
 
     /**
      * Construct a new User. A User must have an ID and can optionally have extra
@@ -81,9 +76,6 @@ export class User extends TypedEventEmitter<UserEvent, UserEventHandlerMap> {
      *                when a user was last active.
      * @prop {Boolean} currentlyActive Whether we should consider lastActiveAgo to be
      *               an approximation and that the user should be seen as active 'now'
-     * @prop {string} unstable_statusMessage The status message for the user, if known. This is
-     *                different from the presenceStatusMsg in that this is not tied to
-     *                the user's presence, and should be represented differently.
      * @prop {Object} events The events describing this user.
      * @prop {MatrixEvent} events.presence The m.presence event for this user.
      */
@@ -219,19 +211,6 @@ export class User extends TypedEventEmitter<UserEvent, UserEventHandlerMap> {
     public getLastActiveTs(): number {
         return this.lastPresenceTs - this.lastActiveAgo;
     }
-
-    /**
-     * Manually set the user's status message.
-     * @param {MatrixEvent} event The <code>im.vector.user_status</code> event.
-     * @fires module:client~MatrixClient#event:"User.unstable_statusMessage"
-     */
-    // eslint-disable-next-line
-    public unstable_updateStatusMessage(event: MatrixEvent): void {
-        if (!event.getContent()) this.unstable_statusMessage = "";
-        else this.unstable_statusMessage = event.getContent()["status"];
-        this.updateModifiedTime();
-        this.emit(UserEvent._UnstableStatusMessage, this);
-    }
 }
 
 /**

src/pushprocessor.ts

@@ -34,6 +34,7 @@ import {
     PushRuleSet,
     TweakName,
 } from "./@types/PushRules";
+import { EventType } from "./@types/event";
 
 /**
  * @module pushprocessor
@@ -55,31 +56,6 @@ const RULEKINDS_IN_ORDER = [
 //   2. We often want to start using push rules ahead of the server supporting them,
 //      and so we can put them here.
 const DEFAULT_OVERRIDE_RULES: IPushRule[] = [
-    {
-        // For homeservers which don't support MSC1930 yet
-        rule_id: ".m.rule.tombstone",
-        default: true,
-        enabled: true,
-        conditions: [
-            {
-                kind: ConditionKind.EventMatch,
-                key: "type",
-                pattern: "m.room.tombstone",
-            },
-            {
-                kind: ConditionKind.EventMatch,
-                key: "state_key",
-                pattern: "",
-            },
-        ],
-        actions: [
-            PushRuleActionName.Notify,
-            {
-                set_tweak: TweakName.Highlight,
-                value: true,
-            },
-        ],
-    },
     {
         // For homeservers which don't support MSC2153 yet
         rule_id: ".m.rule.reaction",
@@ -96,6 +72,22 @@ const DEFAULT_OVERRIDE_RULES: IPushRule[] = [
             PushRuleActionName.DontNotify,
         ],
     },
+    {
+        // For homeservers which don't support MSC3786 yet
+        rule_id: ".org.matrix.msc3786.rule.room.server_acl",
+        default: true,
+        enabled: true,
+        conditions: [
+            {
+                kind: ConditionKind.EventMatch,
+                key: "type",
+                pattern: EventType.RoomServerAcl,
+            },
+        ],
+        actions: [
+            PushRuleActionName.DontNotify,
+        ],
+    },
 ];
 
 export interface IActionsObject {
@@ -300,7 +292,7 @@ export class PushProcessor {
 
         const memberCount = room.currentState.getJoinedMemberCount();
 
-        const m = cond.is.match(/^([=<>]*)([0-9]*)$/);
+        const m = cond.is.match(/^([=<>]*)(\d*)$/);
         if (!m) {
             return false;
         }

src/store/index.ts

@@ -17,11 +17,12 @@ limitations under the License.
 import { EventType } from "../@types/event";
 import { Room } from "../models/room";
 import { User } from "../models/user";
-import { IEvent, MatrixEvent } from "../models/event";
+import { MatrixEvent } from "../models/event";
 import { Filter } from "../filter";
 import { RoomSummary } from "../models/room-summary";
 import { IMinimalEvent, IRooms, ISyncResponse } from "../sync-accumulator";
 import { IStartClientOpts } from "../client";
+import { IStateEventWithRoomId } from "../@types/search";
 
 export interface ISavedSync {
     nextBatch: string;
@@ -36,7 +37,11 @@ export interface ISavedSync {
 export interface IStore {
     readonly accountData: Record<string, MatrixEvent>; // type : content
 
-    /** @return {Promise<bool>} whether or not the database was newly created in this session. */
+    // XXX: The indexeddb store exposes a non-standard emitter for the "degraded" event
+    // for when it falls back to being a memory store due to errors.
+    on?: (event: string, handler: (...args: any[]) => void) => void;
+
+    /** @return {Promise<boolean>} whether or not the database was newly created in this session. */
     isNewlyCreated(): Promise<boolean>;
 
     /**
@@ -104,7 +109,7 @@ export interface IStore {
     /**
      * No-op.
      * @param {Room} room
-     * @param {integer} limit
+     * @param {number} limit
      * @return {Array}
      */
     scrollback(room: Room, limit: number): MatrixEvent[];
@@ -204,9 +209,9 @@ export interface IStore {
      */
     deleteAllData(): Promise<void>;
 
-    getOutOfBandMembers(roomId: string): Promise<IEvent[] | null>;
+    getOutOfBandMembers(roomId: string): Promise<IStateEventWithRoomId[] | null>;
 
-    setOutOfBandMembers(roomId: string, membershipEvents: IEvent[]): Promise<void>;
+    setOutOfBandMembers(roomId: string, membershipEvents: IStateEventWithRoomId[]): Promise<void>;
 
     clearOutOfBandMembers(roomId: string): Promise<void>;
 

src/store/indexeddb-backend.ts

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import { ISavedSync } from "./index";
-import { IEvent, IStartClientOpts, ISyncResponse } from "..";
+import { IEvent, IStartClientOpts, IStateEventWithRoomId, ISyncResponse } from "..";
 
 export interface IIndexedDBBackend {
     connect(): Promise<void>;
@@ -25,8 +25,8 @@ export interface IIndexedDBBackend {
     getSavedSync(): Promise<ISavedSync>;
     getNextBatchToken(): Promise<string>;
     clearDatabase(): Promise<void>;
-    getOutOfBandMembers(roomId: string): Promise<IEvent[] | null>;
-    setOutOfBandMembers(roomId: string, membershipEvents: IEvent[]): Promise<void>;
+    getOutOfBandMembers(roomId: string): Promise<IStateEventWithRoomId[] | null>;
+    setOutOfBandMembers(roomId: string, membershipEvents: IStateEventWithRoomId[]): Promise<void>;
     clearOutOfBandMembers(roomId: string): Promise<void>;
     getUserPresenceEvents(): Promise<UserTuple[]>;
     getClientOptions(): Promise<IStartClientOpts>;

src/store/indexeddb-local-backend.ts

@@ -18,7 +18,7 @@ import { IMinimalEvent, ISyncData, ISyncResponse, SyncAccumulator } from "../syn
 import * as utils from "../utils";
 import * as IndexedDBHelpers from "../indexeddb-helpers";
 import { logger } from '../logger';
-import { IEvent, IStartClientOpts } from "..";
+import { IStartClientOpts, IStateEventWithRoomId } from "..";
 import { ISavedSync } from "./index";
 import { IIndexedDBBackend, UserTuple } from "./indexeddb-backend";
 
@@ -229,15 +229,15 @@ export class LocalIndexedDBStoreBackend implements IIndexedDBBackend {
      * @returns {Promise<event[]>} the events, potentially an empty array if OOB loading didn't yield any new members
      * @returns {null} in case the members for this room haven't been stored yet
      */
-    public getOutOfBandMembers(roomId: string): Promise<IEvent[] | null> {
-        return new Promise<IEvent[] | null>((resolve, reject) => {
+    public getOutOfBandMembers(roomId: string): Promise<IStateEventWithRoomId[] | null> {
+        return new Promise<IStateEventWithRoomId[] | null>((resolve, reject) => {
             const tx = this.db.transaction(["oob_membership_events"], "readonly");
             const store = tx.objectStore("oob_membership_events");
             const roomIndex = store.index("room");
             const range = IDBKeyRange.only(roomId);
             const request = roomIndex.openCursor(range);
 
-            const membershipEvents: IEvent[] = [];
+            const membershipEvents: IStateEventWithRoomId[] = [];
             // did we encounter the oob_written marker object
             // amongst the results? That means OOB member
             // loading already happened for this room
@@ -278,7 +278,7 @@ export class LocalIndexedDBStoreBackend implements IIndexedDBBackend {
      * @param {string} roomId
      * @param {event[]} membershipEvents the membership events to store
      */
-    public async setOutOfBandMembers(roomId: string, membershipEvents: IEvent[]): Promise<void> {
+    public async setOutOfBandMembers(roomId: string, membershipEvents: IStateEventWithRoomId[]): Promise<void> {
         logger.log(`LL: backend about to store ${membershipEvents.length}` +
             ` members for ${roomId}`);
         const tx = this.db.transaction(["oob_membership_events"], "readwrite");
@@ -530,9 +530,7 @@ export class LocalIndexedDBStoreBackend implements IIndexedDBBackend {
             const txn = this.db.transaction(["client_options"], "readonly");
             const store = txn.objectStore("client_options");
             return selectQuery(store, undefined, (cursor) => {
-                if (cursor.value && cursor.value && cursor.value.options) {
-                    return cursor.value.options;
-                }
+                return cursor.value?.options;
             }).then((results) => results[0]);
         });
     }

src/store/indexeddb-remote-backend.ts

@@ -18,7 +18,7 @@ import { logger } from "../logger";
 import { defer, IDeferred } from "../utils";
 import { ISavedSync } from "./index";
 import { IStartClientOpts } from "../client";
-import { IEvent, ISyncResponse } from "..";
+import { IStateEventWithRoomId, ISyncResponse } from "..";
 import { IIndexedDBBackend, UserTuple } from "./indexeddb-backend";
 
 export class RemoteIndexedDBStoreBackend implements IIndexedDBBackend {
@@ -97,7 +97,7 @@ export class RemoteIndexedDBStoreBackend implements IIndexedDBBackend {
      * @returns {event[]} the events, potentially an empty array if OOB loading didn't yield any new members
      * @returns {null} in case the members for this room haven't been stored yet
      */
-    public getOutOfBandMembers(roomId: string): Promise<IEvent[] | null> {
+    public getOutOfBandMembers(roomId: string): Promise<IStateEventWithRoomId[] | null> {
         return this.doCmd('getOutOfBandMembers', [roomId]);
     }
 
@@ -109,7 +109,7 @@ export class RemoteIndexedDBStoreBackend implements IIndexedDBBackend {
      * @param {event[]} membershipEvents the membership events to store
      * @returns {Promise} when all members have been stored
      */
-    public setOutOfBandMembers(roomId: string, membershipEvents: IEvent[]): Promise<void> {
+    public setOutOfBandMembers(roomId: string, membershipEvents: IStateEventWithRoomId[]): Promise<void> {
         return this.doCmd('setOutOfBandMembers', [roomId, membershipEvents]);
     }
 

src/store/indexeddb.ts

@@ -26,6 +26,7 @@ import { ISavedSync } from "./index";
 import { IIndexedDBBackend } from "./indexeddb-backend";
 import { ISyncResponse } from "../sync-accumulator";
 import { TypedEventEmitter } from "../models/typed-event-emitter";
+import { IStateEventWithRoomId } from "../@types/search";
 
 /**
  * This is an internal module. See {@link IndexedDBStore} for the public class.
@@ -242,7 +243,7 @@ export class IndexedDBStore extends MemoryStore {
      * @returns {event[]} the events, potentially an empty array if OOB loading didn't yield any new members
      * @returns {null} in case the members for this room haven't been stored yet
      */
-    public getOutOfBandMembers = this.degradable((roomId: string): Promise<IEvent[]> => {
+    public getOutOfBandMembers = this.degradable((roomId: string): Promise<IStateEventWithRoomId[]> => {
         return this.backend.getOutOfBandMembers(roomId);
     }, "getOutOfBandMembers");
 
@@ -254,10 +255,13 @@ export class IndexedDBStore extends MemoryStore {
      * @param {event[]} membershipEvents the membership events to store
      * @returns {Promise} when all members have been stored
      */
-    public setOutOfBandMembers = this.degradable((roomId: string, membershipEvents: IEvent[]): Promise<void> => {
-        super.setOutOfBandMembers(roomId, membershipEvents);
-        return this.backend.setOutOfBandMembers(roomId, membershipEvents);
-    }, "setOutOfBandMembers");
+    public setOutOfBandMembers = this.degradable(
+        (roomId: string, membershipEvents: IStateEventWithRoomId[]): Promise<void> => {
+            super.setOutOfBandMembers(roomId, membershipEvents);
+            return this.backend.setOutOfBandMembers(roomId, membershipEvents);
+        },
+        "setOutOfBandMembers",
+    );
 
     public clearOutOfBandMembers = this.degradable((roomId: string) => {
         super.clearOutOfBandMembers(roomId);
@@ -293,7 +297,7 @@ export class IndexedDBStore extends MemoryStore {
 
         return async (...args) => {
             try {
-                return func.call(this, ...args);
+                return await func.call(this, ...args);
             } catch (e) {
                 logger.error("IndexedDBStore failure, degrading to MemoryStore", e);
                 this.emitter.emit("degraded", e);

src/store/memory.ts

@@ -22,13 +22,14 @@ limitations under the License.
 import { EventType } from "../@types/event";
 import { Room } from "../models/room";
 import { User } from "../models/user";
-import { IEvent, MatrixEvent } from "../models/event";
+import { MatrixEvent } from "../models/event";
 import { RoomState, RoomStateEvent } from "../models/room-state";
 import { RoomMember } from "../models/room-member";
 import { Filter } from "../filter";
 import { ISavedSync, IStore } from "./index";
 import { RoomSummary } from "../models/room-summary";
 import { ISyncResponse } from "../sync-accumulator";
+import { IStateEventWithRoomId } from "../@types/search";
 
 function isValidFilterId(filterId: string): boolean {
     const isValidStr = typeof filterId === "string" &&
@@ -60,7 +61,7 @@ export class MemoryStore implements IStore {
     private filters: Record<string, Record<string, Filter>> = {};
     public accountData: Record<string, MatrixEvent> = {}; // type : content
     private readonly localStorage: Storage;
-    private oobMembers: Record<string, IEvent[]> = {}; // roomId: [member events]
+    private oobMembers: Record<string, IStateEventWithRoomId[]> = {}; // roomId: [member events]
     private clientOptions = {};
 
     constructor(opts: IOpts = {}) {
@@ -198,7 +199,7 @@ export class MemoryStore implements IStore {
     /**
      * Retrieve scrollback for this room.
      * @param {Room} room The matrix room
-     * @param {integer} limit The max number of old events to retrieve.
+     * @param {number} limit The max number of old events to retrieve.
      * @return {Array<Object>} An array of objects which will be at most 'limit'
      * length and at least 0. The objects are the raw event JSON.
      */
@@ -389,7 +390,7 @@ export class MemoryStore implements IStore {
      * @returns {event[]} the events, potentially an empty array if OOB loading didn't yield any new members
      * @returns {null} in case the members for this room haven't been stored yet
      */
-    public getOutOfBandMembers(roomId: string): Promise<IEvent[] | null> {
+    public getOutOfBandMembers(roomId: string): Promise<IStateEventWithRoomId[] | null> {
         return Promise.resolve(this.oobMembers[roomId] || null);
     }
 
@@ -401,7 +402,7 @@ export class MemoryStore implements IStore {
      * @param {event[]} membershipEvents the membership events to store
      * @returns {Promise} when all members have been stored
      */
-    public setOutOfBandMembers(roomId: string, membershipEvents: IEvent[]): Promise<void> {
+    public setOutOfBandMembers(roomId: string, membershipEvents: IStateEventWithRoomId[]): Promise<void> {
         this.oobMembers[roomId] = membershipEvents;
         return Promise.resolve();
     }

src/store/stub.ts

@@ -22,11 +22,12 @@ limitations under the License.
 import { EventType } from "../@types/event";
 import { Room } from "../models/room";
 import { User } from "../models/user";
-import { IEvent, MatrixEvent } from "../models/event";
+import { MatrixEvent } from "../models/event";
 import { Filter } from "../filter";
 import { ISavedSync, IStore } from "./index";
 import { RoomSummary } from "../models/room-summary";
 import { ISyncResponse } from "../sync-accumulator";
+import { IStateEventWithRoomId } from "../@types/search";
 
 /**
  * Construct a stub store. This does no-ops on most store methods.
@@ -122,7 +123,7 @@ export class StubStore implements IStore {
     /**
      * No-op.
      * @param {Room} room
-     * @param {integer} limit
+     * @param {number} limit
      * @return {Array}
      */
     public scrollback(room: Room, limit: number): MatrixEvent[] {
@@ -242,11 +243,11 @@ export class StubStore implements IStore {
         return Promise.resolve();
     }
 
-    public getOutOfBandMembers(): Promise<IEvent[]> {
+    public getOutOfBandMembers(): Promise<IStateEventWithRoomId[]> {
         return Promise.resolve(null);
     }
 
-    public setOutOfBandMembers(roomId: string, membershipEvents: IEvent[]): Promise<void> {
+    public setOutOfBandMembers(roomId: string, membershipEvents: IStateEventWithRoomId[]): Promise<void> {
         return Promise.resolve();
     }
 

src/sync-accumulator.ts

@@ -24,6 +24,7 @@ import { deepCopy } from "./utils";
 import { IContent, IUnsigned } from "./models/event";
 import { IRoomSummary } from "./models/room-summary";
 import { EventType } from "./@types/event";
+import { ReceiptType } from "./@types/read_receipts";
 
 interface IOpts {
     maxTimelineEntries?: number;
@@ -49,7 +50,6 @@ export interface IRoomEvent extends IMinimalEvent {
     event_id: string;
     sender: string;
     origin_server_ts: number;
-    unsigned?: IUnsigned;
     /** @deprecated - legacy field */
     age?: number;
 }
@@ -157,6 +157,7 @@ interface IRoom {
     _readReceipts: {
         [userId: string]: {
             data: IMinimalEvent;
+            type: ReceiptType;
             eventId: string;
         };
     };
@@ -416,16 +417,31 @@ export class SyncAccumulator {
                 // of a hassle to work with. We'll inflate this back out when
                 // getJSON() is called.
                 Object.keys(e.content).forEach((eventId) => {
-                    if (!e.content[eventId]["m.read"]) {
+                    if (!e.content[eventId][ReceiptType.Read] && !e.content[eventId][ReceiptType.ReadPrivate]) {
                         return;
                     }
-                    Object.keys(e.content[eventId]["m.read"]).forEach((userId) => {
-                        // clobber on user ID
-                        currentData._readReceipts[userId] = {
-                            data: e.content[eventId]["m.read"][userId],
-                            eventId: eventId,
-                        };
-                    });
+                    const read = e.content[eventId][ReceiptType.Read];
+                    if (read) {
+                        Object.keys(read).forEach((userId) => {
+                            // clobber on user ID
+                            currentData._readReceipts[userId] = {
+                                data: e.content[eventId][ReceiptType.Read][userId],
+                                type: ReceiptType.Read,
+                                eventId: eventId,
+                            };
+                        });
+                    }
+                    const readPrivate = e.content[eventId][ReceiptType.ReadPrivate];
+                    if (readPrivate) {
+                        Object.keys(readPrivate).forEach((userId) => {
+                            // clobber on user ID
+                            currentData._readReceipts[userId] = {
+                                data: e.content[eventId][ReceiptType.ReadPrivate][userId],
+                                type: ReceiptType.ReadPrivate,
+                                eventId: eventId,
+                            };
+                        });
+                    }
                 });
             });
         }
@@ -552,11 +568,12 @@ export class SyncAccumulator {
             Object.keys(roomData._readReceipts).forEach((userId) => {
                 const receiptData = roomData._readReceipts[userId];
                 if (!receiptEvent.content[receiptData.eventId]) {
-                    receiptEvent.content[receiptData.eventId] = {
-                        "m.read": {},
-                    };
+                    receiptEvent.content[receiptData.eventId] = {};
                 }
-                receiptEvent.content[receiptData.eventId]["m.read"][userId] = (
+                if (!receiptEvent.content[receiptData.eventId][receiptData.type]) {
+                    receiptEvent.content[receiptData.eventId][receiptData.type] = {};
+                }
+                receiptEvent.content[receiptData.eventId][receiptData.type][userId] = (
                     receiptData.data
                 );
             });

src/sync.ts

@@ -54,6 +54,7 @@ import { IPushRules } from "./@types/PushRules";
 import { RoomStateEvent } from "./models/room-state";
 import { RoomMemberEvent } from "./models/room-member";
 import { BeaconEvent } from "./models/beacon";
+import { IEventsResponse } from "./@types/requests";
 
 const DEBUG = true;
 
@@ -152,7 +153,7 @@ export class SyncApi {
     private syncStateData: ISyncStateData = null; // additional data (eg. error object for failed sync)
     private catchingUp = false;
     private running = false;
-    private keepAliveTimer: number = null;
+    private keepAliveTimer: ReturnType<typeof setTimeout> = null;
     private connectionReturnedDefer: IDeferred<boolean> = null;
     private notifEvents: MatrixEvent[] = []; // accumulator of sync events in the current sync response
     private failedSyncCount = 0; // Number of consecutive failed /sync requests
@@ -274,7 +275,7 @@ export class SyncApi {
             getFilterName(client.credentials.userId, "LEFT_ROOMS"), filter,
         ).then(function(filterId) {
             qps.filter = filterId;
-            return client.http.authedRequest<any>( // TODO types
+            return client.http.authedRequest<ISyncResponse>(
                 undefined, Method.Get, "/sync", qps as any, undefined, localTimeoutMs,
             );
         }).then(async (data) => {
@@ -409,8 +410,7 @@ export class SyncApi {
         }
 
         // FIXME: gut wrenching; hard-coded timeout values
-        // TODO types
-        this.client.http.authedRequest<any>(undefined, Method.Get, "/events", {
+        this.client.http.authedRequest<IEventsResponse>(undefined, Method.Get, "/events", {
             room_id: peekRoom.roomId,
             timeout: String(30 * 1000),
             from: token,
@@ -874,7 +874,7 @@ export class SyncApi {
 
     private doSyncRequest(syncOptions: ISyncOptions, syncToken: string): IRequestPromise<ISyncResponse> {
         const qps = this.getSyncParams(syncOptions, syncToken);
-        return this.client.http.authedRequest( // TODO types
+        return this.client.http.authedRequest<ISyncResponse>(
             undefined, Method.Get, "/sync", qps as any, undefined,
             qps.timeout + BUFFER_PERIOD_MS,
         );
@@ -1295,16 +1295,6 @@ export class SyncApi {
                 if (e.isState() && e.getType() == "m.room.encryption" && this.opts.crypto) {
                     await this.opts.crypto.onCryptoEvent(e);
                 }
-                if (e.isState() && e.getType() === "im.vector.user_status") {
-                    let user = client.store.getUser(e.getStateKey());
-                    if (user) {
-                        user.unstable_updateStatusMessage(e);
-                    } else {
-                        user = createNewUser(client, e.getStateKey());
-                        user.unstable_updateStatusMessage(e);
-                        client.store.storeUser(user);
-                    }
-                }
             };
 
             await utils.promiseMapSeries(stateEvents, processRoomEvent);
@@ -1400,7 +1390,7 @@ export class SyncApi {
      * Starts polling the connectivity check endpoint
      * @param {number} delay How long to delay until the first poll.
      *        defaults to a short, randomised interval (to prevent
-     *        tightlooping if /versions succeeds but /sync etc. fail).
+     *        tight-looping if /versions succeeds but /sync etc. fail).
      * @return {promise} which resolves once the connection returns
      */
     private startKeepAlives(delay?: number): Promise<boolean> {

src/utils.ts

@@ -23,7 +23,7 @@ limitations under the License.
 import unhomoglyph from "unhomoglyph";
 import promiseRetry from "p-retry";
 
-import type NodeCrypto from "crypto";
+import type * as NodeCrypto from "crypto";
 import { MatrixEvent } from ".";
 import { M_TIMESTAMP } from "./@types/location";
 
@@ -464,8 +464,8 @@ export function defer<T = void>(): IDeferred<T> {
 }
 
 export async function promiseMapSeries<T>(
-    promises: T[],
-    fn: (t: T) => void,
+    promises: Array<T | Promise<T>>,
+    fn: (t: T) => Promise<unknown> | void, // if async/promise we don't care about the type as we only await resolution
 ): Promise<void> {
     for (const o of promises) {
         await fn(await o);
@@ -473,7 +473,7 @@ export async function promiseMapSeries<T>(
 }
 
 export function promiseTry<T>(fn: () => T | Promise<T>): Promise<T> {
-    return new Promise((resolve) => resolve(fn()));
+    return Promise.resolve(fn());
 }
 
 // Creates and awaits all promises, running no more than `chunkSize` at the same time
@@ -676,7 +676,13 @@ export function prevString(s: string, alphabet = DEFAULT_ALPHABET): string {
 export function lexicographicCompare(a: string, b: string): number {
     // Dev note: this exists because I'm sad that you can use math operators on strings, so I've
     // hidden the operation in this function.
-    return (a < b) ? -1 : ((a === b) ? 0 : 1);
+    if (a < b) {
+        return -1;
+    } else if (a > b) {
+        return 1;
+    } else {
+        return 0;
+    }
 }
 
 const collator = new Intl.Collator();

src/webrtc/call.ts

@@ -298,7 +298,7 @@ export class MatrixCall extends TypedEventEmitter<CallEvent, CallEventHandlerMap
     // yet, null if we have but they didn't send a party ID.
     private opponentPartyId: string;
     private opponentCaps: CallCapabilities;
-    private inviteTimeout: number;
+    private inviteTimeout: ReturnType<typeof setTimeout>;
 
     // The logic of when & if a call is on hold is nontrivial and explained in is*OnHold
     // This flag represents whether we want the other party to be on hold
@@ -322,7 +322,7 @@ export class MatrixCall extends TypedEventEmitter<CallEvent, CallEventHandlerMap
 
     private remoteSDPStreamMetadata: SDPStreamMetadata;
 
-    private callLengthInterval: number;
+    private callLengthInterval: ReturnType<typeof setInterval>;
     private callLength = 0;
 
     constructor(opts: CallOpts) {
@@ -708,9 +708,9 @@ export class MatrixCall extends TypedEventEmitter<CallEvent, CallEventHandlerMap
 
         const statsReport = await this.peerConn.getStats();
         const stats = [];
-        for (const item of statsReport) {
+        statsReport.forEach(item => {
             stats.push(item[1]);
-        }
+        });
 
         return stats;
     }
@@ -988,9 +988,7 @@ export class MatrixCall extends TypedEventEmitter<CallEvent, CallEventHandlerMap
      * @param {string} desktopCapturerSourceId optional id of the desktop capturer source to use
      * @returns {boolean} new screensharing state
      */
-    public async setScreensharingEnabled(
-        enabled: boolean, desktopCapturerSourceId?: string,
-    ): Promise<boolean> {
+    public async setScreensharingEnabled(enabled: boolean, desktopCapturerSourceId?: string): Promise<boolean> {
         // Skip if there is nothing to do
         if (enabled && this.isScreensharing()) {
             logger.warn(`There is already a screensharing stream - there is nothing to do!`);
@@ -1002,7 +1000,7 @@ export class MatrixCall extends TypedEventEmitter<CallEvent, CallEventHandlerMap
 
         // Fallback to replaceTrack()
         if (!this.opponentSupportsSDPStreamMetadata()) {
-            return await this.setScreensharingEnabledWithoutMetadataSupport(enabled, desktopCapturerSourceId);
+            return this.setScreensharingEnabledWithoutMetadataSupport(enabled, desktopCapturerSourceId);
         }
 
         logger.debug(`Set screensharing enabled? ${enabled}`);
@@ -2264,6 +2262,37 @@ function setTracksEnabled(tracks: Array<MediaStreamTrack>, enabled: boolean): vo
     }
 }
 
+export function supportsMatrixCall(): boolean {
+    // typeof prevents Node from erroring on an undefined reference
+    if (typeof(window) === 'undefined' || typeof(document) === 'undefined') {
+        // NB. We don't log here as apps try to create a call object as a test for
+        // whether calls are supported, so we shouldn't fill the logs up.
+        return false;
+    }
+
+    // Firefox throws on so little as accessing the RTCPeerConnection when operating in a secure mode.
+    // There's some information at https://bugzilla.mozilla.org/show_bug.cgi?id=1542616 though the concern
+    // is that the browser throwing a SecurityError will brick the client creation process.
+    try {
+        const supported = Boolean(
+            window.RTCPeerConnection || window.RTCSessionDescription ||
+            window.RTCIceCandidate || navigator.mediaDevices,
+        );
+        if (!supported) {
+            /* istanbul ignore if */ // Adds a lot of noise to test runs, so disable logging there.
+            if (process.env.NODE_ENV !== "test") {
+                logger.error("WebRTC is not supported in this browser / environment");
+            }
+            return false;
+        }
+    } catch (e) {
+        logger.error("Exception thrown when trying to access WebRTC", e);
+        return false;
+    }
+
+    return true;
+}
+
 /**
  * DEPRECATED
  * Use client.createCall()
@@ -2277,34 +2306,8 @@ function setTracksEnabled(tracks: Array<MediaStreamTrack>, enabled: boolean): vo
  * since it's only possible to set this option on outbound calls.
  * @return {MatrixCall} the call or null if the browser doesn't support calling.
  */
-export function createNewMatrixCall(client: any, roomId: string, options?: CallOpts): MatrixCall {
-    // typeof prevents Node from erroring on an undefined reference
-    if (typeof(window) === 'undefined' || typeof(document) === 'undefined') {
-        // NB. We don't log here as apps try to create a call object as a test for
-        // whether calls are supported, so we shouldn't fill the logs up.
-        return null;
-    }
-
-    // Firefox throws on so little as accessing the RTCPeerConnection when operating in
-    // a secure mode. There's some information at https://bugzilla.mozilla.org/show_bug.cgi?id=1542616
-    // though the concern is that the browser throwing a SecurityError will brick the
-    // client creation process.
-    try {
-        const supported = Boolean(
-            window.RTCPeerConnection || window.RTCSessionDescription ||
-            window.RTCIceCandidate || navigator.mediaDevices,
-        );
-        if (!supported) {
-            // Adds a lot of noise to test runs, so disable logging there.
-            if (process.env.NODE_ENV !== "test") {
-                logger.error("WebRTC is not supported in this browser / environment");
-            }
-            return null;
-        }
-    } catch (e) {
-        logger.error("Exception thrown when trying to access WebRTC", e);
-        return null;
-    }
+export function createNewMatrixCall(client: any, roomId: string, options?: CallOpts): MatrixCall | null {
+    if (!supportsMatrixCall()) return null;
 
     const optionsForceTURN = options ? options.forceTURN : false;
 

src/webrtc/callEventHandler.ts

@@ -72,21 +72,17 @@ export class CallEventHandler {
                 this.client.decryptEventIfNeeded(event);
             }));
 
-            const ignoreCallIds = new Set<String>();
+            const ignoreCallIds = new Set<string>();
             // inspect the buffer and mark all calls which have been answered
             // or hung up before passing them to the call event handler.
             for (const ev of this.callEventBuffer) {
-                if (ev.getType() === EventType.CallAnswer ||
-                        ev.getType() === EventType.CallHangup) {
+                if (ev.getType() === EventType.CallAnswer || ev.getType() === EventType.CallHangup) {
                     ignoreCallIds.add(ev.getContent().call_id);
                 }
             }
             // now loop through the buffer chronologically and inject them
             for (const e of this.callEventBuffer) {
-                if (
-                    e.getType() === EventType.CallInvite &&
-                    ignoreCallIds.has(e.getContent().call_id)
-                ) {
+                if (e.getType() === EventType.CallInvite && ignoreCallIds.has(e.getContent().call_id)) {
                     // This call has previously been answered or hung up: ignore it
                     continue;
                 }
@@ -191,7 +187,7 @@ export class CallEventHandler {
             }
 
             // Were we trying to call that user (room)?
-            let existingCall;
+            let existingCall: MatrixCall;
             for (const thisCall of this.calls.values()) {
                 const isCalling = [CallState.WaitLocalMedia, CallState.CreateOffer, CallState.InviteSent].includes(
                     thisCall.state,

src/webrtc/callFeed.ts

@@ -69,7 +69,7 @@ export class CallFeed extends TypedEventEmitter<CallFeedEvent, EventHandlerMap>
     private frequencyBinCount: Float32Array;
     private speakingThreshold = SPEAKING_THRESHOLD;
     private speaking = false;
-    private volumeLooperTimeout: number;
+    private volumeLooperTimeout: ReturnType<typeof setTimeout>;
 
     constructor(opts: ICallFeedOpts) {
         super();