appease linter

Co-authored-by: Robin <robin@robin.town>

.eslintrc.cjs

@@ -8,7 +8,7 @@ Please see LICENSE in the repository root for full details.
 `;
 
 module.exports = {
-  plugins: ["matrix-org", "rxjs", "jsdoc"],
+  plugins: ["matrix-org", "rxjs"],
   extends: [
     "plugin:matrix-org/react",
     "plugin:matrix-org/a11y",
@@ -26,13 +26,6 @@ module.exports = {
     node: true,
   },
   rules: {
-    "jsdoc/no-types": "error",
-    "jsdoc/empty-tags": "error",
-    "jsdoc/check-property-names": "error",
-    "jsdoc/check-values": "error",
-    "jsdoc/check-param-names": "warn",
-    // "jsdoc/require-param": "warn",
-    "jsdoc/require-param-description": "warn",
     "matrix-org/require-copyright-header": ["error", COPYRIGHT_HEADER],
     "jsx-a11y/media-has-caption": "off",
     "react/display-name": "error",
@@ -50,29 +43,6 @@ module.exports = {
     // To encourage good usage of RxJS:
     "rxjs/no-exposed-subjects": "error",
     "rxjs/finnish": ["error", { names: { "^this$": false } }],
-    "no-restricted-imports": [
-      "error",
-      {
-        paths: ["matrix-widget-api", "matrix-js-sdk"].flatMap((lib) =>
-          ["src", "src/", "src/index", "lib", "lib/", "lib/index"]
-            .map((path) => `${lib}/${path}`)
-            .map((name) => ({ name, message: `Please use ${lib} instead` })),
-        ),
-        patterns: [
-          ...["matrix-widget-api"].map((lib) => ({
-            group: ["src", "src/", "src/**", "lib", "lib/", "lib/**"].map(
-              (path) => `${lib}/${path}`,
-            ),
-            message: `Please use ${lib} instead`,
-          })),
-          // XXX: We use /lib in lots of places, so allow for now.
-          ...["matrix-js-sdk"].map((lib) => ({
-            group: ["src", "src/", "src/**"].map((path) => `${lib}/${path}`),
-            message: `Please use ${lib} instead`,
-          })),
-        ],
-      },
-    ],
   },
   overrides: [
     {
@@ -82,23 +52,6 @@ module.exports = {
         "no-console": ["error"],
       },
     },
-    {
-      files: [
-        "**/*.test.ts",
-        "**/*.test.tsx",
-        "**/test.ts",
-        "**/test.tsx",
-        "**/test-**",
-      ],
-      rules: {
-        "jsdoc/no-types": "off",
-        "jsdoc/empty-tags": "off",
-        "jsdoc/check-property-names": "off",
-        "jsdoc/check-values": "off",
-        "jsdoc/check-param-names": "off",
-        "jsdoc/require-param-description": "off",
-      },
-    },
   ],
   settings: {
     react: {

.github/workflows/blocked.yaml

@@ -10,7 +10,7 @@ jobs:
       pull-requests: read
     steps:
       - name: Add notice
-        uses: actions/github-script@f28e40c7f34bde8b3046d885e986cb6290c5673b # v7
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
         if: contains(github.event.pull_request.labels.*.name, 'X-Blocked')
         with:
           script: |

.github/workflows/build-and-publish-docker.yaml

@@ -23,7 +23,7 @@ jobs:
       packages: write
     steps:
       - name: Check it out
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: 📥 Download artifact
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
@@ -34,7 +34,7 @@ jobs:
           path: dist
 
       - name: Log in to container registry
-        uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -42,7 +42,7 @@ jobs:
 
       - name: Extract metadata (tags, labels) for Docker
         id: meta
-        uses: docker/metadata-action@318604b99e75e41977312d83839a89be02ca4893 # v5.9.0
+        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: ${{ inputs.docker_tags}}
@@ -50,10 +50,10 @@ jobs:
             org.opencontainers.image.licenses=AGPL-3.0-only OR LicenseRef-Element-Commercial
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
+        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
+        uses: docker/build-push-action@14487ce63c7a62a4a324b0bfb37086795e31c6c1 # v6.16.0
         with:
           context: .
           platforms: linux/amd64,linux/arm64

.github/workflows/build-element-call.yaml

@@ -32,7 +32,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: Enable Corepack
         run: corepack enable
       - name: Yarn cache

.github/workflows/lint.yaml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: Enable Corepack
         run: corepack enable
       - name: Yarn cache

.github/workflows/publish-embedded-packages.yaml

@@ -85,7 +85,7 @@ jobs:
         run: find ${{ env.FILENAME_PREFIX }} -type f -print0 | sort -z | xargs -0 sha256sum | tee ${{ env.FILENAME_PREFIX }}.sha256
       - name: Upload
         if: ${{ needs.versioning.outputs.DRY_RUN == 'false' }}
-        uses: softprops/action-gh-release@a06a81a03ee405af7f2048a818ed3f03bbf83c7b # v2
+        uses: softprops/action-gh-release@da05d552573ad5aba039eaac05058a918a7bf631 # v2
         with:
           files: |
             ${{ env.FILENAME_PREFIX }}.tar.gz
@@ -100,10 +100,10 @@ jobs:
       ARTIFACT_VERSION: ${{ steps.artifact_version.outputs.ARTIFACT_VERSION }}
     permissions:
       contents: read
-      id-token: write # Allow npm to authenticate as a trusted publisher
+      id-token: write # required for the provenance flag on npm publish
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: 📥 Download built element-call artifact
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
@@ -126,6 +126,8 @@ jobs:
           npm version ${{ needs.versioning.outputs.PREFIXED_VERSION }} --no-git-tag-version
           echo "ARTIFACT_VERSION=$(jq '.version' --raw-output package.json)" >> "$GITHUB_ENV"
           npm publish --provenance --access public --tag ${{ needs.versioning.outputs.TAG }} ${{ needs.versioning.outputs.DRY_RUN == 'true' && '--dry-run' || '' }}
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_RELEASE_TOKEN }}
 
       - id: artifact_version
         name: Output artifact version
@@ -142,7 +144,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: 📥 Download built element-call artifact
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
@@ -197,7 +199,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
           path: element-call
 
@@ -210,7 +212,7 @@ jobs:
           path: element-call/embedded/ios/Sources/dist
 
       - name: Checkout element-call-swift
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
           repository: element-hq/element-call-swift
           path: element-call-swift
@@ -262,7 +264,7 @@ jobs:
           echo "iOS: ${{ needs.publish_ios.outputs.ARTIFACT_VERSION }}"
       - name: Add release notes
         if: ${{ needs.versioning.outputs.DRY_RUN == 'false' }}
-        uses: softprops/action-gh-release@a06a81a03ee405af7f2048a818ed3f03bbf83c7b # v2
+        uses: softprops/action-gh-release@da05d552573ad5aba039eaac05058a918a7bf631 # v2
         with:
           append_body: true
           body: |

.github/workflows/publish.yaml

@@ -42,7 +42,7 @@ jobs:
       - name: Create Checksum
         run: find ${{ env.FILENAME_PREFIX }} -type f -print0 | sort -z | xargs -0 sha256sum | tee ${{ env.FILENAME_PREFIX }}.sha256
       - name: Upload
-        uses: softprops/action-gh-release@a06a81a03ee405af7f2048a818ed3f03bbf83c7b # v2
+        uses: softprops/action-gh-release@da05d552573ad5aba039eaac05058a918a7bf631 # v2
         with:
           files: |
             ${{ env.FILENAME_PREFIX }}.tar.gz
@@ -68,7 +68,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Add release note
-        uses: softprops/action-gh-release@a06a81a03ee405af7f2048a818ed3f03bbf83c7b # v2
+        uses: softprops/action-gh-release@da05d552573ad5aba039eaac05058a918a7bf631 # v2
         with:
           append_body: true
           body: |

.github/workflows/test.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: Enable Corepack
         run: corepack enable
       - name: Yarn cache
@@ -22,7 +22,7 @@ jobs:
       - name: Vitest
         run: "yarn run test:coverage"
       - name: Upload to codecov
-        uses: codecov/codecov-action@5a1091511ad55cbe89839c7260b706298ca349f7 # v5
+        uses: codecov/codecov-action@18283e04ce6e62d37312384ff67231eb8fd56d24 # v5
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
         with:
@@ -30,10 +30,10 @@ jobs:
           fail_ci_if_error: true
   playwright:
     name: Run end-to-end tests
-    timeout-minutes: 60
+    timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
       - name: Enable Corepack
         run: corepack enable
       - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4

.github/workflows/translations-download.yaml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout the code
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Enable Corepack
         run: corepack enable
@@ -42,7 +42,7 @@ jobs:
 
       - name: Create Pull Request
         id: cpr
-        uses: peter-evans/create-pull-request@84ae59a2cdc2258d6fa0732dd66352dddae2a412 # v7.0.9
+        uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8
         with:
           token: ${{ secrets.ELEMENT_BOT_TOKEN }}
           branch: actions/localazy-download

.github/workflows/translations-upload.yaml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout the code
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Upload
         uses: localazy/upload@27e6b5c0fddf4551596b42226b1c24124335d24a # v1

.node-version

@@ -1 +1 @@
-24
+22

backend/dev_homeserver.yaml

@@ -38,8 +38,6 @@ experimental_features:
   # MSC4222 needed for syncv2 state_after. This allow clients to
   # correctly track the state of the room.
   msc4222_enabled: true
-  # sticky events for matrixRTC user state
-  msc4354_enabled: true
 
 # The maximum allowed duration by which sent events can be delayed, as
 # per MSC4140. Must be a positive value if set.  Defaults to no

codecov.yaml

@@ -13,6 +13,7 @@ coverage:
         informational: true
     patch:
       default:
-        # Enforce 80% coverage on all lines that a PR
+        # Encourage (but don't enforce) 80% coverage on all lines that a PR
         # touches
         target: 80%
+        informational: true

config/config_netlify_preview.json

@@ -18,7 +18,7 @@
     "api_host": "https://posthog-element-call.element.io"
   },
   "rageshake": {
-    "submit_url": "https://rageshakes.element.io/api/submit"
+    "submit_url": "https://element.io/bugreports/submit"
   },
   "sentry": {
     "environment": "netlify-pr-preview",

dev-backend-docker-compose.yml

@@ -47,7 +47,7 @@ services:
       - ecbackend
 
   livekit:
-    image: livekit/livekit-server:v1.9.4
+    image: livekit/livekit-server:latest
     pull_policy: always
     hostname: livekit-sfu
     command: --dev --config /etc/livekit.yaml
@@ -67,7 +67,7 @@ services:
       - ecbackend
 
   livekit-1:
-    image: livekit/livekit-server:v1.9.4
+    image: livekit/livekit-server:latest
     pull_policy: always
     hostname: livekit-sfu-1
     command: --dev --config /etc/livekit.yaml

docs/self-hosting.md

@@ -136,8 +136,8 @@ handle @jwt_service {
   reverse_proxy http://[::1]:8080 {
     header_up Host {host}
     header_up X-Forwarded-Server {host}
-    header_up X-Real-IP {remote_host}
-    header_up X-Forwarded-For {remote_host}
+    header_up X-Real-IP {remote_addr}
+    header_up X-Forwarded-For {remote_addr}
   }
 }
 
@@ -146,8 +146,8 @@ handle {
   reverse_proxy http://localhost:7880 {
     header_up Host {host}
     header_up X-Forwarded-Server {host}
-    header_up X-Real-IP {remote_host}
-    header_up X-Forwarded-For {remote_host}
+    header_up X-Real-IP {remote_addr}
+    header_up X-Forwarded-For {remote_addr}
   }
 }
 ```
@@ -283,7 +283,6 @@ self-hosters and developers working with Element Call.
 - [MatrixRTC with Synology Container Manager (Docker)](https://ztfr.de/matrixrtc-with-synology-container-manager-docker/)
 - [Encrypted & Scalable Video Calls: How to deploy an Element Call backend with Synapse Using Docker-Compose](https://willlewis.co.uk/blog/posts/deploy-element-call-backend-with-synapse-and-docker-compose/)
 - [Element Call einrichten: Verschlüsselte Videoanrufe mit Element X und Matrix Synapse](https://www.cleveradmin.de/blog/2025/04/matrixrtc-element-call-backend-einrichten/)
-- [MatrixRTC Back-End for Synapse with Docker Compose and Traefik](https://forge.avontech.net/kstro1/matrixrtc-docker-traefik/)
 
 ## 🛠️ Tools
 

docs/url-params.md

@@ -96,6 +96,6 @@ These parameters are only supported in the [embedded](./embedded-standalone.md)
 | -------------------- | -------------------------------------------------------------------------- | -------- | ---------------------------------------------------------------------------------------------------------------------------------- |
 | `posthogApiHost`     | Posthog server URL                                                         | No       | e.g. `https://posthog-element-call.element.io`. Only supported in embedded package. In full package the value from config is used. |
 | `posthogApiKey`      | Posthog project API key                                                    | No       | Only supported in embedded package. In full package the value from config is used.                                                 |
-| `rageshakeSubmitUrl` | Rageshake server URL endpoint                                              | No       | e.g. `https://rageshakes.element.io/api/submit`. In full package the value from config is used.                                    |
+| `rageshakeSubmitUrl` | Rageshake server URL endpoint                                              | No       | e.g. `https://element.io/bugreports/submit`. In full package the value from config is used.                                        |
 | `sentryDsn`          | Sentry [DSN](https://docs.sentry.io/concepts/key-terms/dsn-explainer/)     | No       | In full package the value from config is used.                                                                                     |
 | `sentryEnvironment`  | Sentry [environment](https://docs.sentry.io/concepts/key-terms/key-terms/) | No       | In full package the value from config is used.                                                                                     |

embedded/android/gradle/libs.versions.toml

@@ -2,11 +2,11 @@
 # https://docs.gradle.org/current/userguide/platforms.html#sub::toml-dependencies-format
 
 [versions]
-android_gradle_plugin = "8.13.1"
+android_gradle_plugin = "8.11.1"
 
 [libraries]
 android_gradle_plugin = { module = "com.android.tools.build:gradle", version.ref = "android_gradle_plugin" }
 
 [plugins]
 android_library = { id = "com.android.library", version.ref = "android_gradle_plugin" }
-maven_publish = { id = "com.vanniktech.maven.publish", version = "0.35.0" }
+maven_publish = { id = "com.vanniktech.maven.publish", version = "0.34.0" }

knip.ts

@@ -9,7 +9,7 @@ import { type KnipConfig } from "knip";
 
 export default {
   vite: {
-    config: ["vite.config.ts", "vite-embedded.config.ts", "vite-sdk.config.ts"],
+    config: ["vite.config.ts", "vite-embedded.config.ts"],
   },
   entry: ["src/main.tsx", "i18next-parser.config.ts"],
   ignoreBinaries: [

locales/en/app.json

@@ -64,14 +64,6 @@
   "developer_mode": {
     "always_show_iphone_earpiece": "Show iPhone earpiece option on all platforms",
     "crypto_version": "Crypto version: {{version}}",
-    "custom_livekit_url": {
-      "current_url": "Currently set to: ",
-      "from_config": "Currently, no overwrite is set. Url from well-known or config is used.",
-      "label": "Custom Livekit-url",
-      "reset": "Reset overwrite",
-      "save": "Save",
-      "saving": "Saving..."
-    },
     "debug_tile_layout_label": "Debug tile layout",
     "device_id": "Device ID: {{id}}",
     "duplicate_tiles_label": "Number of additional tile copies per participant",
@@ -80,24 +72,12 @@
     "livekit_server_info": "LiveKit Server Info",
     "livekit_sfu": "LiveKit SFU: {{url}}",
     "matrix_id": "Matrix ID: {{id}}",
-    "matrixRTCMode": {
-      "Comptibility": {
-        "description": "Compatible with homeservers that do not support sticky events (but all other EC clients are v0.17.0 or later)",
-        "label": "Compatibility: state events & multi SFU"
-      },
-      "Legacy": {
-        "description": "Compatible with old versions of EC that do not support multi SFU",
-        "label": "Legacy: state events & oldest membership SFU"
-      },
-      "Matrix_2_0": {
-        "description": "Compatible only with homservers supporting sticky events and all EC clients v0.17.0 or later",
-        "label": "Matrix 2.0: sticky events & multi SFU"
-      },
-      "title": "MatrixRTC mode"
-    },
     "mute_all_audio": "Mute all audio (participants, reactions, join sounds)",
     "show_connection_stats": "Show connection statistics",
-    "url_params": "URL parameters"
+    "show_non_member_tiles": "Show tiles for non-member media",
+    "url_params": "URL parameters",
+    "use_new_membership_manager": "Use the new implementation of the call MembershipManager",
+    "use_to_device_key_transport": "Use to device key transport. This will fallback to room key transport when another call member sent a room key"
   },
   "disconnected_banner": "Connectivity to the server has been lost.",
   "error": {
@@ -108,14 +88,11 @@
     "connection_lost_description": "You were disconnected from the call.",
     "e2ee_unsupported": "Incompatible browser",
     "e2ee_unsupported_description": "Your web browser does not support encrypted calls. Supported browsers include Chrome, Safari, and Firefox 117+.",
-    "failed_to_start_livekit": "Failed to start Livekit connection",
     "generic": "Something went wrong",
     "generic_description": "Submitting debug logs will help us track down the problem.",
     "insufficient_capacity": "Insufficient capacity",
     "insufficient_capacity_description": "The server has reached its maximum capacity and you cannot join the call at this time. Try again later, or contact your server admin if the problem persists.",
-    "matrix_rtc_transport_missing": "The server is not configured to work with {{brand}}. Please contact your server admin (Domain: {{domain}}, Error Code: {{ errorCode }}).",
-    "membership_manager": "Membership Manager Error",
-    "membership_manager_description": "The Membership Manager had to shut down. This is caused by many consequtive failed network requests.",
+    "matrix_rtc_focus_missing": "The server is not configured to work with {{brand}}. Please contact your server admin (Domain: {{domain}}, Error Code: {{ errorCode }}).",
     "open_elsewhere": "Opened in another tab",
     "open_elsewhere_description": "{{brand}} has been opened in another tab. If that doesn't sound right, try reloading the page.",
     "room_creation_restricted": "Failed to create call",

package.json

@@ -13,8 +13,6 @@
     "build:embedded": "yarn build:full --config vite-embedded.config.js",
     "build:embedded:production": "yarn build:embedded",
     "build:embedded:development": "yarn build:embedded --mode development",
-    "build:sdk": "yarn build:full --config vite-sdk.config.js",
-    "build:sdk:development": "yarn build:sdk --mode development",
     "serve": "vite preview",
     "prettier:check": "prettier -c .",
     "prettier:format": "prettier -w .",
@@ -46,7 +44,7 @@
     "@formatjs/intl-segmenter": "^11.7.3",
     "@livekit/components-core": "^0.12.0",
     "@livekit/components-react": "^2.0.0",
-    "@livekit/protocol": "^1.42.2",
+    "@livekit/protocol": "^1.38.0",
     "@livekit/track-processors": "^0.5.5",
     "@mediapipe/tasks-vision": "^0.10.18",
     "@opentelemetry/api": "^1.4.0",
@@ -56,7 +54,7 @@
     "@opentelemetry/sdk-trace-base": "^2.0.0",
     "@opentelemetry/sdk-trace-web": "^2.0.0",
     "@opentelemetry/semantic-conventions": "^1.25.1",
-    "@playwright/test": "^1.57.0",
+    "@playwright/test": "^1.52.0",
     "@radix-ui/react-dialog": "^1.0.4",
     "@radix-ui/react-slider": "^1.1.2",
     "@radix-ui/react-visually-hidden": "^1.0.3",
@@ -73,7 +71,7 @@
     "@types/grecaptcha": "^3.0.9",
     "@types/jsdom": "^21.1.7",
     "@types/lodash-es": "^4.17.12",
-    "@types/node": "^24.0.0",
+    "@types/node": "^22.0.0",
     "@types/pako": "^2.0.3",
     "@types/qrcode": "^1.5.5",
     "@types/react": "^19.0.0",
@@ -95,14 +93,12 @@
     "eslint-config-prettier": "^10.0.0",
     "eslint-plugin-deprecate": "^0.8.2",
     "eslint-plugin-import": "^2.26.0",
-    "eslint-plugin-jsdoc": "^61.5.0",
     "eslint-plugin-jsx-a11y": "^6.5.1",
     "eslint-plugin-matrix-org": "2.1.0",
     "eslint-plugin-react": "^7.29.4",
     "eslint-plugin-react-hooks": "^5.0.0",
     "eslint-plugin-rxjs": "^5.0.3",
     "eslint-plugin-unicorn": "^56.0.0",
-    "fetch-mock": "11.1.5",
     "global-jsdom": "^26.0.0",
     "i18next": "^24.0.0",
     "i18next-browser-languagedetector": "^8.0.0",
@@ -112,9 +108,8 @@
     "livekit-client": "^2.13.0",
     "lodash-es": "^4.17.21",
     "loglevel": "^1.9.1",
-    "matrix-js-sdk": "matrix-org/matrix-js-sdk#2218ec4e3102e841ba3e794e1c492c0a5aa6c1c3",
-    "matrix-widget-api": "^1.14.0",
-    "node-stdlib-browser": "^1.3.1",
+    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#head=develop",
+    "matrix-widget-api": "^1.13.0",
     "normalize.css": "^8.0.1",
     "observable-hooks": "^4.2.3",
     "pako": "^2.0.4",
@@ -137,7 +132,6 @@
     "vite": "^7.0.0",
     "vite-plugin-generate-file": "^0.3.0",
     "vite-plugin-html": "^3.2.2",
-    "vite-plugin-node-stdlib-browser": "^0.2.1",
     "vite-plugin-svgr": "^4.0.0",
     "vitest": "^3.0.0",
     "vitest-axe": "^1.0.0-pre.3"

playwright.config.ts

@@ -38,7 +38,6 @@ export default defineConfig({
   projects: [
     {
       name: "chromium",
-      testIgnore: "**/mobile/**",
       use: {
         ...devices["Desktop Chrome"],
         permissions: [
@@ -57,9 +56,9 @@ export default defineConfig({
         },
       },
     },
+
     {
       name: "firefox",
-      testIgnore: "**/mobile/**",
       use: {
         ...devices["Desktop Firefox"],
         ignoreHTTPSErrors: true,
@@ -71,27 +70,6 @@ export default defineConfig({
         },
       },
     },
-    {
-      name: "mobile",
-      testMatch: "**/mobile/**",
-      use: {
-        ...devices["Pixel 7"],
-        ignoreHTTPSErrors: true,
-        permissions: [
-          "clipboard-write",
-          "clipboard-read",
-          "microphone",
-          "camera",
-        ],
-        launchOptions: {
-          args: [
-            "--use-fake-ui-for-media-stream",
-            "--use-fake-device-for-media-stream",
-            "--mute-audio",
-          ],
-        },
-      },
-    },
 
     // No safari for now, until I find a solution to fix `Not allowed to request resource` due to calling
     // clear http to the homeserver

playwright/errors.spec.ts

@@ -7,8 +7,6 @@ Please see LICENSE in the repository root for full details.
 
 import { expect, test } from "@playwright/test";
 
-import { createJTWToken } from "./fixtures/jwt-token";
-
 test("Should show error screen if fails to get JWT token", async ({ page }) => {
   await page.goto("/");
 
@@ -77,12 +75,7 @@ test("Should automatically retry non fatal JWT errors", async ({
 
 test("Should show error screen if call creation is restricted", async ({
   page,
-  browserName,
 }) => {
-  test.skip(
-    browserName === "firefox",
-    "The is test is not working on firefox CI environment.",
-  );
   await page.goto("/");
 
   // We need the socket connection to fail, but this cannot be done by using the websocket route.
@@ -95,7 +88,7 @@ test("Should show error screen if call creation is restricted", async ({
         contentType: "application/json",
         body: JSON.stringify({
           url: "wss://badurltotricktest/livekit/sfu",
-          jwt: createJTWToken("@fake:user", "!fake:room"),
+          jwt: "FAKE",
         }),
       }),
   );

playwright/fixtures/fixture-mobile-create.ts

@@ -1,73 +0,0 @@
-/*
-Copyright 2025 New Vector Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-import { type Browser, type Page, test, expect } from "@playwright/test";
-
-export interface MobileCreateFixtures {
-  asMobile: {
-    creatorPage: Page;
-    inviteLink: string;
-  };
-}
-
-export const mobileTest = test.extend<MobileCreateFixtures>({
-  asMobile: async ({ browser }, pUse) => {
-    const fixtures = await createCallAndInvite(browser);
-    await pUse({
-      creatorPage: fixtures.page,
-      inviteLink: fixtures.inviteLink,
-    });
-  },
-});
-
-/**
- * Create a call and generate an invite link
- */
-async function createCallAndInvite(
-  browser: Browser,
-): Promise<{ page: Page; inviteLink: string }> {
-  const creatorContext = await browser.newContext({ reducedMotion: "reduce" });
-  const creatorPage = await creatorContext.newPage();
-
-  await creatorPage.goto("/");
-
-  // ========
-  // ARRANGE: The first user creates a call as guest, join it, then click the invite button to copy the invite link
-  // ========
-  await creatorPage.getByTestId("home_callName").click();
-  await creatorPage.getByTestId("home_callName").fill("Welcome");
-  await creatorPage.getByTestId("home_displayName").click();
-  await creatorPage.getByTestId("home_displayName").fill("Inviter");
-  await creatorPage.getByTestId("home_go").click();
-  await expect(creatorPage.locator("video")).toBeVisible();
-
-  await creatorPage
-    .getByRole("button", { name: "Continue in browser" })
-    .click();
-  // join
-  await creatorPage.getByTestId("lobby_joinCall").click();
-
-  // Get the invite link
-  await creatorPage.getByRole("button", { name: "Invite" }).click();
-  await expect(
-    creatorPage.getByRole("heading", { name: "Invite to this call" }),
-  ).toBeVisible();
-  await expect(creatorPage.getByRole("img", { name: "QR Code" })).toBeVisible();
-  await expect(creatorPage.getByTestId("modal_inviteLink")).toBeVisible();
-  await expect(creatorPage.getByTestId("modal_inviteLink")).toBeVisible();
-  await creatorPage.getByTestId("modal_inviteLink").click();
-
-  const inviteLink = (await creatorPage.evaluate(
-    "navigator.clipboard.readText()",
-  )) as string;
-  expect(inviteLink).toContain("room/#/");
-
-  return {
-    page: creatorPage,
-    inviteLink,
-  };
-}

playwright/fixtures/jwt-token.ts

@@ -1,22 +0,0 @@
-/*
-Copyright 2025 New Vector Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-export function createJTWToken(sub: string, room: string): string {
-  return [
-    {}, // header
-    {
-      // payload
-      sub,
-      video: {
-        room,
-      },
-    },
-    {}, // signature
-  ]
-    .map((d) => global.btoa(JSON.stringify(d)))
-    .join(".");
-}

playwright/fixtures/widget-user.ts

@@ -67,6 +67,7 @@ const CONFIG_JSON = {
 
 /**
  * Set the Element Call URL in the dev tool settings using `window.mxSettingsStore` via `page.evaluate`.
+ * @param page
  */
 const setDevToolElementCallDevUrl = process.env.USE_DOCKER
   ? async (page: Page): Promise<void> => {
@@ -110,27 +111,19 @@ async function registerUser(
   await page.getByRole("textbox", { name: "Confirm password" }).click();
   await page.getByRole("textbox", { name: "Confirm password" }).fill(PASSWORD);
   await page.getByRole("button", { name: "Register" }).click();
-
+  const continueButton = page.getByRole("button", { name: "Continue" });
+  try {
+    await expect(continueButton).toBeVisible({ timeout: 5000 });
+    await page
+      .getByRole("textbox", { name: "Password", exact: true })
+      .fill(PASSWORD);
+    await continueButton.click();
+  } catch {
+    // continueButton not visible, continue as normal
+  }
   await expect(
     page.getByRole("heading", { name: `Welcome ${username}` }),
   ).toBeVisible();
-
-  const browserUnsupportedToast = page
-    .getByText("Element does not support this browser")
-    .locator("..")
-    .locator("..");
-
-  // Dismiss incompatible browser toast
-  const dismissButton = browserUnsupportedToast.getByRole("button", {
-    name: "Dismiss",
-  });
-  try {
-    await expect(dismissButton).toBeVisible({ timeout: 700 });
-    await dismissButton.click();
-  } catch {
-    // dismissButton not visible, continue as normal
-  }
-
   await setDevToolElementCallDevUrl(page);
 
   const clientHandle = await page.evaluateHandle(() =>
@@ -166,11 +159,7 @@ export const widgetTest = test.extend<MyFixtures>({
     } = await registerUser(browser, userB);
 
     // Invite the second user
-    await ewPage1
-      .getByRole("navigation", { name: "Room list" })
-      .getByRole("button", { name: "New conversation" })
-      .click();
-
+    await ewPage1.getByRole("button", { name: "Add", exact: true }).click();
     await ewPage1.getByRole("menuitem", { name: "New Room" }).click();
     await ewPage1.getByRole("textbox", { name: "Name" }).fill("Welcome Room");
     await ewPage1.getByRole("button", { name: "Create room" }).click();

playwright/mobile/create-call-mobile.spec.ts

@@ -1,115 +0,0 @@
-/*
-Copyright 2025 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-import { expect, test } from "@playwright/test";
-
-import { mobileTest } from "../fixtures/fixture-mobile-create.ts";
-
-test("@mobile Start a new call then leave and show the feedback screen", async ({
-  page,
-}) => {
-  await page.goto("/");
-
-  await page.getByTestId("home_callName").click();
-  await page.getByTestId("home_callName").fill("HelloCall");
-  await page.getByTestId("home_displayName").click();
-  await page.getByTestId("home_displayName").fill("John Doe");
-  await page.getByTestId("home_go").click();
-
-  // await page.pause();
-  await expect(page.locator("video")).toBeVisible();
-  await expect(page.getByTestId("lobby_joinCall")).toBeVisible();
-
-  await page.getByRole("button", { name: "Continue in browser" }).click();
-  // Join the call
-  await page.getByTestId("lobby_joinCall").click();
-
-  // Ensure that the call is connected
-  await page
-    .locator("div")
-    .filter({ hasText: /^HelloCall$/ })
-    .click();
-  // Check the number of participants
-  await expect(page.locator("div").filter({ hasText: /^1$/ })).toBeVisible();
-  // The tooltip with the name should be visible
-  await expect(page.getByTestId("name_tag")).toContainText("John Doe");
-
-  // leave the call
-  await page.getByTestId("incall_leave").click();
-  await expect(page.getByRole("heading")).toContainText(
-    "John Doe, your call has ended. How did it go?",
-  );
-  await expect(page.getByRole("main")).toContainText(
-    "Why not finish by setting up a password to keep your account?",
-  );
-
-  await expect(
-    page.getByRole("link", { name: "Not now, return to home screen" }),
-  ).toBeVisible();
-});
-
-mobileTest(
-  "Test earpiece overlay in controlledAudioDevices mode",
-  async ({ asMobile, browser }) => {
-    test.slow(); // Triples the timeout
-    const { creatorPage, inviteLink } = asMobile;
-
-    // ========
-    // ACT: The other user use the invite link to join the call as a guest
-    // ========
-    const guestInviteeContext = await browser.newContext({
-      reducedMotion: "reduce",
-    });
-    const guestPage = await guestInviteeContext.newPage();
-    await guestPage.goto(inviteLink + "&controlledAudioDevices=true");
-
-    await guestPage
-      .getByRole("button", { name: "Continue in browser" })
-      .click();
-
-    await guestPage.getByTestId("joincall_displayName").fill("Invitee");
-    await expect(guestPage.getByTestId("joincall_joincall")).toBeVisible();
-    await guestPage.getByTestId("joincall_joincall").click();
-    await guestPage.getByTestId("lobby_joinCall").click();
-
-    // ========
-    // ASSERT: check that there are two members in the call
-    // ========
-
-    // There should be two participants now
-    await expect(
-      guestPage.getByTestId("roomHeader_participants_count"),
-    ).toContainText("2");
-    expect(await guestPage.getByTestId("videoTile").count()).toBe(2);
-
-    // Same in creator page
-    await expect(
-      creatorPage.getByTestId("roomHeader_participants_count"),
-    ).toContainText("2");
-    expect(await creatorPage.getByTestId("videoTile").count()).toBe(2);
-
-    // TEST: control audio devices from the invitee page
-
-    await guestPage.evaluate(() => {
-      window.controls.setAvailableAudioDevices([
-        { id: "speaker", name: "Speaker", isSpeaker: true },
-        { id: "earpiece", name: "Handset", isEarpiece: true },
-        { id: "headphones", name: "Headphones" },
-      ]);
-      window.controls.setAudioDevice("earpiece");
-    });
-    await expect(
-      guestPage.getByRole("heading", { name: "Handset Mode" }),
-    ).toBeVisible();
-    await expect(
-      guestPage.getByRole("button", { name: "Back to Speaker Mode" }),
-    ).toBeVisible();
-
-    // Should auto-mute the video when earpiece is selected
-    await expect(guestPage.getByTestId("incall_videomute")).toBeDisabled();
-  },
-);

playwright/sfu-reconnect-bug.spec.ts

@@ -68,6 +68,11 @@ test("When creator left, avoid reconnect to the same SFU", async ({
     reducedMotion: "reduce",
   });
   const guestCPage = await guestC.newPage();
+  let sfuGetCallCount = 0;
+  await guestCPage.route("**/livekit/jwt/sfu/get", async (route) => {
+    sfuGetCallCount++;
+    await route.continue();
+  });
   // Track WebSocket connections
   let wsConnectionCount = 0;
   await guestCPage.routeWebSocket("**", (ws) => {
@@ -95,4 +100,5 @@ test("When creator left, avoid reconnect to the same SFU", async ({
   // https://github.com/element-hq/element-call/issues/3344
   // The app used to request a new jwt token then to reconnect to the SFU
   expect(wsConnectionCount).toBe(1);
+  expect(sfuGetCallCount).toBe(2 /* the first one is for the warmup */);
 });

sdk/README.md

@@ -1,35 +0,0 @@
-# SDK mode
-
-EC can be build in sdk mode. This will result in a compiled js file that can be imported in very simple webapps.
-
-It allows to use matrixRTC in combination with livekit without relying on element call.
-
-This is done by instantiating the call view model and exposing some useful behaviors (observables) and methods.
-
-This folder contains an example index.html file that showcases the sdk in use (hosted on localhost:8123 with a webserver ellowing cors (for example `npx serve -l 81234 --cors`)) as a godot engine HTML export template.
-
-## Widgets
-
-The sdk mode is particularly interesting to be used in widgets where you do not need to pay attention to matrix login/cs api ...
-To create a widget see the example index.html file in this folder. And add it to EW via:
-`/addwidget <widgetUrl>` (see **url parameters** for more details on `<widgetUrl>`)
-
-### url parameters
-
-```
-widgetId = $matrix_widget_id
-perParticipantE2EE = true
-userId = $matrix_user_id
-deviceId = $org.matrix.msc3819.matrix_device_id
-baseUrl = $org.matrix.msc4039.matrix_base_url
-```
-
-`parentUrl = // will be inserted automatically`
-
-Full template use as `<widgetUrl>`:
-
-```
-http://localhost:3000?widgetId=$matrix_widget_id&perParticipantE2EE=true&userId=$matrix_user_id&deviceId=$org.matrix.msc3819.matrix_device_id&baseUrl=$org.matrix.msc4039.matrix_base_url&roomId=$matrix_room_id
-```
-
-the `$` prefixed variables will be replaced by EW on widget instantiation. (e.g. `$matrix_user_id` -> `@user:example.com` (url encoding will also be applied automatically by EW) -> `%40user%3Aexample.com`)

sdk/helper.ts

@@ -1,55 +0,0 @@
-/*
-Copyright 2025 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-/**
- * This file contains helper functions and types for the MatrixRTC SDK.
- */
-
-import { logger as rootLogger } from "matrix-js-sdk/lib/logger";
-import { scan } from "rxjs";
-
-import { widget as _widget } from "../src/widget";
-import { type LivekitRoomItem } from "../src/state/CallViewModel/CallViewModel";
-
-export const logger = rootLogger.getChild("[MatrixRTCSdk]");
-
-if (!_widget) throw Error("No widget. This webapp can only start as a widget");
-export const widget = _widget;
-
-export const tryMakeSticky = (): void => {
-  logger.info("try making sticky MatrixRTCSdk");
-  void widget.api
-    .setAlwaysOnScreen(true)
-    .then(() => {
-      logger.info("sticky MatrixRTCSdk");
-    })
-    .catch((error) => {
-      logger.error("failed to make sticky MatrixRTCSdk", error);
-    });
-};
-export const TEXT_LK_TOPIC = "matrixRTC";
-/**
- * simple helper operator to combine the last emitted and the current emitted value of a rxjs observable
- *
- * I think there should be a builtin for this but i did not find it...
- */
-export const currentAndPrev = scan<
-  LivekitRoomItem[],
-  {
-    prev: LivekitRoomItem[];
-    current: LivekitRoomItem[];
-  }
->(
-  ({ current: lastCurrentVal }, items) => ({
-    prev: lastCurrentVal,
-    current: items,
-  }),
-  {
-    prev: [],
-    current: [],
-  },
-);

sdk/index.html

@@ -1,87 +0,0 @@
-<!doctype html>
-<html>
-  <head>
-    <title>Godot MatrixRTC Widget</title>
-    <meta charset="utf-8" />
-    <script type="module">
-      // TODO use the url where the matrixrtc-sdk.js file from dist is hosted
-      import { createMatrixRTCSdk } from "http://localhost:8123/matrixrtc-sdk.js";
-
-      try {
-        window.matrixRTCSdk = await createMatrixRTCSdk(
-          "com.github.toger5.godot-game",
-        );
-        console.info("createMatrixRTCSdk was created!");
-      } catch (e) {
-        console.error("createMatrixRTCSdk", e);
-      }
-      const sdk = window.matrixRTCSdk;
-
-      // This is the main bridging interface to godot
-      window.matrixRTCSdkGodot = {
-        dataObs: sdk.data$,
-        memberObs: sdk.members$,
-        // join: sdk.join, // lets stick with autojoin for now
-        sendData: sdk.sendData,
-        leave: sdk.leave,
-        connectedObs: sdk.connected$,
-      };
-
-      console.info("matrixRTCSdk join ", sdk);
-      const connectionState = sdk.join();
-      console.info("matrixRTCSdk joined");
-
-      const div = document.getElementById("data");
-      div.innerHTML = "<h3>Data:</h3>";
-
-      sdk.data$.subscribe((data) => {
-        const child = document.createElement("p");
-        child.innerHTML = JSON.stringify(data);
-        div.appendChild(child);
-        // TODO forward to godot
-      });
-
-      sdk.members$.subscribe((memberObjects) => {
-        // reset div
-        const div = document.getElementById("members");
-        div.innerHTML = "<h3>Members:</h3>";
-
-        // create member list
-        const members = memberObjects.map((member) => member.membership.sender);
-        console.info("members changed", members);
-        for (const m of members) {
-          console.info("member", m);
-          const child = document.createElement("p");
-          child.innerHTML = m;
-          div.appendChild(child);
-        }
-      });
-
-      sdk.connected$.subscribe((connected) => {
-        console.info("connected changed", connected);
-        const div = document.getElementById("connect_status");
-        div.innerHTML = connected ? "Connected" : "Disconnected";
-      });
-
-      let engine = new Engine($GODOT_CONFIG);
-      engine.startGame();
-    </script>
-    <!--// TODO use it as godot HTML template-->
-    <script src="$GODOT_URL"></script>
-  </head>
-  <body>
-    <canvas id="canvas"></canvas>
-    <div
-      id="overlay"
-      style="position: absolute; top: 0; right: 0; background-color: #ffffff10"
-    >
-      <div id="connect_status"></div>
-      <button onclick="window.matrixRTCSdk.leave();">Leave</button>
-      <button onclick="window.matrixRTCSdk.sendData({prop: 'Hello, world!'});">
-        Send Text
-      </button>
-      <div id="members"></div>
-      <div id="data"></div>
-    </div>
-  </body>
-</html>

sdk/main.ts

@@ -1,308 +0,0 @@
-/*
-Copyright 2025 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-/**
- * This file is the entrypoint for the sdk build of element call: `yarn build:sdk`
- * use in widgets.
- * It exposes the `createMatrixRTCSdk` which creates the `MatrixRTCSdk` interface (see below) that
- * can be used to join a rtc session and exchange realtime data.
- * It takes care of all the tricky bits:
- *  - sending delayed events
- *  - finding the right sfu
- *  - handling the media stream
- *  - sending join/leave state or sticky events
- *  - setting up encryption and scharing keys
- */
-
-import {
-  combineLatest,
-  map,
-  type Observable,
-  of,
-  shareReplay,
-  Subject,
-  switchMap,
-  tap,
-} from "rxjs";
-import {
-  type CallMembership,
-  MatrixRTCSession,
-  MatrixRTCSessionEvent,
-} from "matrix-js-sdk/lib/matrixrtc";
-import {
-  type Room as LivekitRoom,
-  type TextStreamReader,
-  type LocalParticipant,
-  type RemoteParticipant,
-} from "livekit-client";
-
-// TODO how can this get fixed? to just be part of `livekit-client`
-// Can this be done in the tsconfig.json
-import { type TextStreamInfo } from "../node_modules/livekit-client/dist/src/room/types";
-import { type Behavior, constant } from "../src/state/Behavior";
-import { createCallViewModel$ } from "../src/state/CallViewModel/CallViewModel";
-import { ObservableScope } from "../src/state/ObservableScope";
-import { getUrlParams } from "../src/UrlParams";
-import { MuteStates } from "../src/state/MuteStates";
-import { MediaDevices } from "../src/state/MediaDevices";
-import { E2eeType } from "../src/e2ee/e2eeType";
-import {
-  currentAndPrev,
-  logger,
-  TEXT_LK_TOPIC,
-  tryMakeSticky,
-  widget,
-} from "./helper";
-import { ElementWidgetActions } from "../src/widget";
-import { type Connection } from "../src/state/CallViewModel/remoteMembers/Connection";
-
-interface MatrixRTCSdk {
-  /**
-   * observe connected$ to track the state.
-   * @returns
-   */
-  join: () => void;
-  /** @throws on leave errors */
-  leave: () => void;
-  data$: Observable<{ sender: string; data: string }>;
-  /**
-   * flattened list of members
-   */
-  members$: Behavior<
-    {
-      connection: Connection | null;
-      membership: CallMembership;
-      participant: LocalParticipant | RemoteParticipant | null;
-    }[]
-  >;
-  /** Use the LocalMemberConnectionState returned from `join` for a more detailed connection state  */
-  connected$: Behavior<boolean>;
-  sendData?: (data: unknown) => Promise<void>;
-}
-
-export async function createMatrixRTCSdk(
-  application: string = "m.call",
-  id: string = "",
-): Promise<MatrixRTCSdk> {
-  logger.info("Hello");
-  const client = await widget.client;
-  logger.info("client created");
-  const scope = new ObservableScope();
-  const { roomId } = getUrlParams();
-  if (roomId === null) throw Error("could not get roomId from url params");
-
-  const room = client.getRoom(roomId);
-  if (room === null) throw Error("could not get room from client");
-
-  const mediaDevices = new MediaDevices(scope);
-  const muteStates = new MuteStates(scope, mediaDevices, constant(true));
-  const slot = { application, id };
-  const rtcSession = new MatrixRTCSession(
-    client,
-    room,
-    MatrixRTCSession.sessionMembershipsForSlot(room, slot),
-    slot,
-  );
-  const callViewModel = createCallViewModel$(
-    scope,
-    rtcSession,
-    room,
-    mediaDevices,
-    muteStates,
-    { encryptionSystem: { kind: E2eeType.PER_PARTICIPANT } },
-    of({}),
-    of({}),
-    constant({ supported: false, processor: undefined }),
-  );
-  logger.info("CallViewModelCreated");
-  // create data listener
-  const data$ = new Subject<{ sender: string; data: string }>();
-
-  const lkTextStreamHandlerFunction = async (
-    reader: TextStreamReader,
-    participantInfo: { identity: string },
-    livekitRoom: LivekitRoom,
-  ): Promise<void> => {
-    const info = reader.info;
-    logger.info(
-      `Received text stream from ${participantInfo.identity}\n` +
-        `  Topic: ${info.topic}\n` +
-        `  Timestamp: ${info.timestamp}\n` +
-        `  ID: ${info.id}\n` +
-        `  Size: ${info.size}`, // Optional, only available if the stream was sent with `sendText`
-    );
-
-    const participants = callViewModel.livekitRoomItems$.value.find(
-      (i) => i.livekitRoom === livekitRoom,
-    )?.participants;
-    if (participants && participants.includes(participantInfo.identity)) {
-      const text = await reader.readAll();
-      logger.info(`Received text: ${text}`);
-      data$.next({ sender: participantInfo.identity, data: text });
-    } else {
-      logger.warn(
-        "Received text from unknown participant",
-        participantInfo.identity,
-      );
-    }
-  };
-
-  const livekitRoomItemsSub = callViewModel.livekitRoomItems$
-    .pipe(
-      tap((beforecurrentAndPrev) => {
-        logger.info(
-          `LiveKit room items updated: ${beforecurrentAndPrev.length}`,
-          beforecurrentAndPrev,
-        );
-      }),
-      currentAndPrev,
-      tap((aftercurrentAndPrev) => {
-        logger.info(
-          `LiveKit room items updated: ${aftercurrentAndPrev.current.length}, ${aftercurrentAndPrev.prev.length}`,
-          aftercurrentAndPrev,
-        );
-      }),
-    )
-    .subscribe({
-      next: ({ prev, current }) => {
-        const prevRooms = prev.map((i) => i.livekitRoom);
-        const currentRooms = current.map((i) => i.livekitRoom);
-        const addedRooms = currentRooms.filter((r) => !prevRooms.includes(r));
-        const removedRooms = prevRooms.filter((r) => !currentRooms.includes(r));
-        addedRooms.forEach((r) => {
-          logger.info(`Registering text stream handler for room `);
-          r.registerTextStreamHandler(
-            TEXT_LK_TOPIC,
-            (reader, participantInfo) =>
-              void lkTextStreamHandlerFunction(reader, participantInfo, r),
-          );
-        });
-        removedRooms.forEach((r) => {
-          logger.info(`Unregistering text stream handler for room `);
-          r.unregisterTextStreamHandler(TEXT_LK_TOPIC);
-        });
-      },
-      complete: () => {
-        logger.info("Livekit room items subscription completed");
-        for (const item of callViewModel.livekitRoomItems$.value) {
-          logger.info("unregistering room item from room", item.url);
-          item.livekitRoom.unregisterTextStreamHandler(TEXT_LK_TOPIC);
-        }
-      },
-    });
-
-  // create sendData function
-  const sendFn: Behavior<(data: string) => Promise<TextStreamInfo>> =
-    scope.behavior(
-      callViewModel.localMatrixLivekitMember$.pipe(
-        switchMap((m) => {
-          if (!m)
-            return of((data: string): never => {
-              throw Error("local membership not yet ready.");
-            });
-          return m.participant.value$.pipe(
-            map((p) => {
-              if (p === null) {
-                return (data: string): never => {
-                  throw Error("local participant not yet ready to send data.");
-                };
-              } else {
-                return async (data: string): Promise<TextStreamInfo> =>
-                  p.sendText(data, { topic: TEXT_LK_TOPIC });
-              }
-            }),
-          );
-        }),
-      ),
-    );
-
-  const sendData = async (data: unknown): Promise<void> => {
-    const dataString = JSON.stringify(data);
-    logger.info("try sending: ", dataString);
-    try {
-      await Promise.resolve();
-      const info = await sendFn.value(dataString);
-      logger.info(`Sent text with stream ID: ${info.id}`);
-    } catch (e) {
-      logger.error("failed sending: ", dataString, e);
-    }
-  };
-
-  // after hangup gets called
-  const leaveSubs = callViewModel.leave$.subscribe(() => {
-    const scheduleWidgetCloseOnLeave = async (): Promise<void> => {
-      const leaveResolver = Promise.withResolvers<void>();
-      logger.info("waiting for RTC leave");
-      rtcSession.on(MatrixRTCSessionEvent.JoinStateChanged, (isJoined) => {
-        logger.info("received RTC join update: ", isJoined);
-        if (!isJoined) leaveResolver.resolve();
-      });
-      await leaveResolver.promise;
-      logger.info("send Unstick");
-      await widget.api
-        .setAlwaysOnScreen(false)
-        .catch((e) =>
-          logger.error(
-            "Failed to set call widget `alwaysOnScreen` to false",
-            e,
-          ),
-        );
-      logger.info("send Close");
-      await widget.api.transport
-        .send(ElementWidgetActions.Close, {})
-        .catch((e) => logger.error("Failed to send close action", e));
-    };
-
-    // schedule close first and then leave (scope.end)
-    void scheduleWidgetCloseOnLeave();
-
-    // actual hangup (ending scope will send the leave event.. its kinda odd. since you might end up closing the widget too fast)
-    scope.end();
-  });
-
-  logger.info("createMatrixRTCSdk done");
-
-  return {
-    join: (): void => {
-      // first lets try making the widget sticky
-      tryMakeSticky();
-      callViewModel.join();
-    },
-    leave: (): void => {
-      callViewModel.hangup();
-      leaveSubs.unsubscribe();
-      livekitRoomItemsSub.unsubscribe();
-    },
-    data$,
-    connected$: callViewModel.connected$,
-    members$: scope.behavior(
-      callViewModel.matrixLivekitMembers$.pipe(
-        switchMap((members) => {
-          const listOfMemberObservables = members.map((member) =>
-            combineLatest([
-              member.connection$,
-              member.membership$,
-              member.participant.value$,
-            ]).pipe(
-              map(([connection, membership, participant]) => ({
-                connection,
-                membership,
-                participant,
-              })),
-              // using shareReplay instead of a Behavior here because the behavior would need
-              // a tricky scope.end() setup.
-              shareReplay({ bufferSize: 1, refCount: true }),
-            ),
-          );
-          return combineLatest(listOfMemberObservables);
-        }),
-      ),
-      [],
-    ),
-    sendData,
-  };
-}

src/MediaDevicesContext.ts

@@ -23,6 +23,14 @@ export function useMediaDevices(): MediaDevices {
   return mediaDevices;
 }
 
+export const useIsEarpiece = (): boolean => {
+  const devices = useMediaDevices();
+  const audioOutput = useObservableEagerState(devices.audioOutput.selected$);
+  const available = useObservableEagerState(devices.audioOutput.available$);
+  if (!audioOutput?.id) return false;
+  return available.get(audioOutput.id)?.type === "earpiece";
+};
+
 /**
  * A convenience hook to get the audio node configuration for the earpiece.
  * It will check the `useAsEarpiece` of the `audioOutput` device and return

src/RTCConnectionStats.tsx

@@ -19,26 +19,10 @@ import mediaViewStyles from "../src/tile/MediaView.module.css";
 interface Props {
   audio?: RTCInboundRtpStreamStats | RTCOutboundRtpStreamStats;
   video?: RTCInboundRtpStreamStats | RTCOutboundRtpStreamStats;
-  focusUrl?: string;
 }
 
-const extractDomain = (url: string): string => {
-  try {
-    const parsedUrl = new URL(url);
-    return parsedUrl.hostname; // Returns "kdk.cpm"
-  } catch (error) {
-    console.error("Invalid URL:", error);
-    return url;
-  }
-};
-
 // This is only used in developer mode for debugging purposes, so we don't need full localization
-export const RTCConnectionStats: FC<Props> = ({
-  audio,
-  video,
-  focusUrl,
-  ...rest
-}) => {
+export const RTCConnectionStats: FC<Props> = ({ audio, video, ...rest }) => {
   const [showModal, setShowModal] = useState(false);
   const [modalContents, setModalContents] = useState<
     "video" | "audio" | "none"
@@ -71,13 +55,6 @@ export const RTCConnectionStats: FC<Props> = ({
           </pre>
         </div>
       </Modal>
-      {focusUrl && (
-        <div>
-          <Text as="span" size="xs" title="focusURL">
-            &nbsp;{extractDomain(focusUrl)}
-          </Text>
-        </div>
-      )}
       {audio && (
         <div>
           <Button

src/UrlParams.test.ts

@@ -332,42 +332,6 @@ describe("UrlParams", () => {
       expect(computeUrlParams("?intent=join_existing").skipLobby).toBe(false);
     });
   });
-
-  describe("noiseSuppression", () => {
-    it("defaults to true", () => {
-      expect(computeUrlParams().noiseSuppression).toBe(true);
-    });
-
-    it("is parsed", () => {
-      expect(
-        computeUrlParams("?intent=start_call&noiseSuppression=true")
-          .noiseSuppression,
-      ).toBe(true);
-      expect(
-        computeUrlParams("?intent=start_call&noiseSuppression&bar=foo")
-          .noiseSuppression,
-      ).toBe(true);
-      expect(computeUrlParams("?noiseSuppression=false").noiseSuppression).toBe(
-        false,
-      );
-    });
-  });
-
-  describe("echoCancellation", () => {
-    it("defaults to true", () => {
-      expect(computeUrlParams().echoCancellation).toBe(true);
-    });
-
-    it("is parsed", () => {
-      expect(computeUrlParams("?echoCancellation=true").echoCancellation).toBe(
-        true,
-      );
-      expect(computeUrlParams("?echoCancellation=false").echoCancellation).toBe(
-        false,
-      );
-    });
-  });
-
   describe("header", () => {
     it("uses header if provided", () => {
       expect(computeUrlParams("?header=app_bar&hideHeader=true").header).toBe(

src/UrlParams.ts

@@ -233,17 +233,6 @@ export interface UrlConfiguration {
    */
   waitForCallPickup: boolean;
 
-  /**
-   * Whether to enable echo cancellation for audio capture.
-   * Defaults to true.
-   */
-  echoCancellation?: boolean;
-  /**
-   * Whether to enable noise suppression for audio capture.
-   * Defaults to true.
-   */
-  noiseSuppression?: boolean;
-
   callIntent?: RTCCallIntent;
 }
 interface IntentAndPlatformDerivedConfiguration {
@@ -536,8 +525,6 @@ export const computeUrlParams = (search = "", hash = ""): UrlParams => {
     ]),
     waitForCallPickup: parser.getFlag("waitForCallPickup"),
     autoLeaveWhenOthersLeft: parser.getFlag("autoLeave"),
-    noiseSuppression: parser.getFlagParam("noiseSuppression", true),
-    echoCancellation: parser.getFlagParam("echoCancellation", true),
   };
 
   // Log the final configuration for debugging purposes.

src/analytics/PosthogAnalytics.ts

@@ -247,8 +247,9 @@ export class PosthogAnalytics {
           // wins, and the first writer will send tracking with an ID that doesn't match the one on the server
           // until the next time account data is refreshed and this function is called (most likely on next
           // page load). This will happen pretty infrequently, so we can tolerate the possibility.
-          analyticsID = analyticsIdGenerator();
-          await this.setAccountAnalyticsId(analyticsID);
+          const accountDataAnalyticsId = analyticsIdGenerator();
+          await this.setAccountAnalyticsId(accountDataAnalyticsId);
+          analyticsID = await this.hashedEcAnalyticsId(accountDataAnalyticsId);
         }
       } catch (e) {
         // The above could fail due to network requests, but not essential to starting the application,
@@ -269,14 +270,37 @@ export class PosthogAnalytics {
 
   private async getAnalyticsId(): Promise<string | null> {
     const client: MatrixClient = window.matrixclient;
+    let accountAnalyticsId: string | null;
     if (widget) {
-      return getUrlParams().posthogUserId;
+      accountAnalyticsId = getUrlParams().posthogUserId;
     } else {
       const accountData = await client.getAccountDataFromServer(
         PosthogAnalytics.ANALYTICS_EVENT_TYPE,
       );
-      return accountData?.id ?? null;
+      accountAnalyticsId = accountData?.id ?? null;
     }
+    if (accountAnalyticsId) {
+      // we dont just use the element web analytics ID because that would allow to associate
+      // users between the two posthog instances. By using a hash from the username and the element web analytics id
+      // it is not possible to conclude the element web posthog user id from the element call user id and vice versa.
+      return await this.hashedEcAnalyticsId(accountAnalyticsId);
+    }
+    return null;
+  }
+
+  private async hashedEcAnalyticsId(
+    accountAnalyticsId: string,
+  ): Promise<string> {
+    const client: MatrixClient = window.matrixclient;
+    const posthogIdMaterial = "ec" + accountAnalyticsId + client.getUserId();
+    const bufferForPosthogId = await crypto.subtle.digest(
+      "sha-256",
+      new TextEncoder().encode(posthogIdMaterial),
+    );
+    const view = new Int32Array(bufferForPosthogId);
+    return Array.from(view)
+      .map((b) => Math.abs(b).toString(16).padStart(2, "0"))
+      .join("");
   }
 
   private async setAccountAnalyticsId(analyticsID: string): Promise<void> {

src/button/ReactionToggleButton.test.tsx

@@ -6,22 +6,21 @@ Please see LICENSE in the repository root for full details.
 */
 
 import { act, render } from "@testing-library/react";
-import { expect, test, vi } from "vitest";
+import { expect, test } from "vitest";
 import { TooltipProvider } from "@vector-im/compound-web";
 import { userEvent } from "@testing-library/user-event";
 import { type ReactNode } from "react";
+import { type MatrixRTCSession } from "matrix-js-sdk/lib/matrixrtc";
 
 import { ReactionToggleButton } from "./ReactionToggleButton";
 import { ElementCallReactionEventType } from "../reactions";
-import { type CallViewModel } from "../state/CallViewModel/CallViewModel";
+import { type CallViewModel } from "../state/CallViewModel";
 import { getBasicCallViewModelEnvironment } from "../utils/test-viewmodel";
 import { alice, local, localRtcMember } from "../utils/test-fixtures";
 import { type MockRTCSession } from "../utils/test";
 import { ReactionsSenderProvider } from "../reactions/useReactionsSender";
 
-vi.mock("livekit-client/e2ee-worker?worker");
-
-const localIdent = `${localRtcMember.userId}:${localRtcMember.deviceId}`;
+const localIdent = `${localRtcMember.sender}:${localRtcMember.deviceId}`;
 
 function TestComponent({
   rtcSession,
@@ -34,7 +33,7 @@ function TestComponent({
     <TooltipProvider>
       <ReactionsSenderProvider
         vm={vm}
-        rtcSession={rtcSession.asMockedSession()}
+        rtcSession={rtcSession as unknown as MatrixRTCSession}
       >
         <ReactionToggleButton vm={vm} identifier={localIdent} />
       </ReactionsSenderProvider>

src/button/ReactionToggleButton.tsx

@@ -33,7 +33,7 @@ import {
   ReactionsRowSize,
 } from "../reactions";
 import { Modal } from "../Modal";
-import { type CallViewModel } from "../state/CallViewModel/CallViewModel";
+import { type CallViewModel } from "../state/CallViewModel";
 import { useBehavior } from "../useBehavior";
 
 interface InnerButtonProps extends ComponentPropsWithoutRef<"button"> {

src/config/ConfigOptions.ts

@@ -122,7 +122,7 @@ export interface ConfigOptions {
     delayed_leave_event_delay_ms?: number;
 
     /**
-     * The time (in milliseconds) after which we consider a delayed event restart http request to have failed.
+     * The time (in milliseconds) after which a we consider a delayed event restart http request to have failed.
      * Setting this to a lower value will result in more frequent retries but also a higher chance of failiour.
      *
      * In the presence of network packet loss (hurting TCP connections), the custom delayedEventRestartLocalTimeoutMs

src/e2ee/sharedKeyManagement.ts

@@ -34,8 +34,8 @@ const getRoomSharedKeyLocalStorageKey = (roomId: string): string =>
   `room-shared-key-${roomId}`;
 
 /**
- * An up-to-date shared key for the room. Either from local storage or the value from `setInitialValue`.
- * @param roomId The room ID we want the shared key for.
+ * An upto-date shared key for the room. Either from local storage or the value from `setInitialValue`.
+ * @param roomId
  * @param setInitialValue The value we get from the URL. The hook will overwrite the local storage value with this.
  * @returns [roomSharedKey, setRoomSharedKey] like a react useState hook.
  */

src/grid/GridLayout.tsx

@@ -14,7 +14,7 @@ import {
 import { distinctUntilChanged } from "rxjs";
 import { useObservableEagerState } from "observable-hooks";
 
-import { type GridLayout as GridLayoutModel } from "../state/layout-types.ts";
+import { type GridLayout as GridLayoutModel } from "../state/CallViewModel";
 import styles from "./GridLayout.module.css";
 import { useInitial } from "../useInitial";
 import { type CallLayout, arrangeTiles } from "./CallLayout";

src/grid/OneOnOneLayout.tsx

@@ -9,7 +9,7 @@ import { type ReactNode, useCallback, useMemo } from "react";
 import { useObservableEagerState } from "observable-hooks";
 import classNames from "classnames";
 
-import { type OneOnOneLayout as OneOnOneLayoutModel } from "../state/layout-types.ts";
+import { type OneOnOneLayout as OneOnOneLayoutModel } from "../state/CallViewModel";
 import { type CallLayout, arrangeTiles } from "./CallLayout";
 import styles from "./OneOnOneLayout.module.css";
 import { type DragCallback, useUpdateLayout } from "./Grid";

src/grid/SpotlightExpandedLayout.tsx

@@ -7,7 +7,7 @@ Please see LICENSE in the repository root for full details.
 
 import { type ReactNode, useCallback } from "react";
 
-import { type SpotlightExpandedLayout as SpotlightExpandedLayoutModel } from "../state/layout-types.ts";
+import { type SpotlightExpandedLayout as SpotlightExpandedLayoutModel } from "../state/CallViewModel";
 import { type CallLayout } from "./CallLayout";
 import { type DragCallback, useUpdateLayout } from "./Grid";
 import styles from "./SpotlightExpandedLayout.module.css";

src/grid/SpotlightLandscapeLayout.tsx

@@ -10,7 +10,7 @@ import { useObservableEagerState } from "observable-hooks";
 import classNames from "classnames";
 
 import { type CallLayout } from "./CallLayout";
-import { type SpotlightLandscapeLayout as SpotlightLandscapeLayoutModel } from "../state/layout-types.ts";
+import { type SpotlightLandscapeLayout as SpotlightLandscapeLayoutModel } from "../state/CallViewModel";
 import styles from "./SpotlightLandscapeLayout.module.css";
 import { useUpdateLayout, useVisibleTiles } from "./Grid";
 

src/grid/SpotlightPortraitLayout.tsx

@@ -10,7 +10,7 @@ import { useObservableEagerState } from "observable-hooks";
 import classNames from "classnames";
 
 import { type CallLayout, arrangeTiles } from "./CallLayout";
-import { type SpotlightPortraitLayout as SpotlightPortraitLayoutModel } from "../state/layout-types.ts";
+import { type SpotlightPortraitLayout as SpotlightPortraitLayoutModel } from "../state/CallViewModel";
 import styles from "./SpotlightPortraitLayout.module.css";
 import { useUpdateLayout, useVisibleTiles } from "./Grid";
 import { useBehavior } from "../useBehavior";

src/home/useGroupCallRooms.ts

@@ -113,49 +113,19 @@ const roomIsJoinable = (room: Room): boolean => {
   }
 };
 
-/**
- * Determines if a given room has call events in it, and therefore
- * is likely to be a call room.
- * @param room The Matrix room instance.
- * @returns `true` if the room has call events.
- */
 const roomHasCallMembershipEvents = (room: Room): boolean => {
-  // Check our room membership first, to rule out any rooms
-  // we can't have a call in.
-  const myMembership = room.getMyMembership();
-  if (myMembership === KnownMembership.Knock) {
-    // Assume that a room you've knocked on is able to hold calls
-    return true;
-  } else if (myMembership !== KnownMembership.Join) {
-    // Otherwise, non-joined rooms should never show up.
-    return false;
-  }
-
-  // Legacy member state checks (cheaper to check.)
-  const timeline = room.getLiveTimeline();
-  if (
-    timeline
-      .getState(EventTimeline.FORWARDS)
-      ?.events?.has(EventType.GroupCallMemberPrefix)
-  ) {
-    return true;
-  }
-
-  // Check for *active* calls using sticky events.
-  for (const sticky of room._unstable_getStickyEvents()) {
-    if (sticky.getType() === EventType.RTCMembership) {
+  switch (room.getMyMembership()) {
+    case KnownMembership.Join:
+      return !!room
+        .getLiveTimeline()
+        .getState(EventTimeline.FORWARDS)
+        ?.events?.get(EventType.GroupCallMemberPrefix);
+    case KnownMembership.Knock:
+      // Assume that a room you've knocked on is able to hold calls
       return true;
-    }
+    default:
+      return false;
   }
-
-  // Otherwise, check recent event history to see if anyone had
-  // sent a call membership in here.
-  return timeline.getEvents().some(
-    (e) =>
-      // Membership events only count if both of these are true
-      e.unstableStickyInfo && e.getType() === EventType.GroupCallMemberPrefix,
-  );
-  // Otherwise, it's *unlikely* this room was ever a call.
 };
 
 export function useGroupCallRooms(client: MatrixClient): GroupCallRoom[] {

src/livekit/MatrixAudioRenderer.test.tsx

@@ -6,28 +6,20 @@ Please see LICENSE in the repository root for full details.
 */
 
 import { afterEach, beforeEach, expect, it, vi } from "vitest";
-import { render, type RenderResult } from "@testing-library/react";
+import { render } from "@testing-library/react";
+import { type CallMembership } from "matrix-js-sdk/lib/matrixrtc";
 import {
   getTrackReferenceId,
   type TrackReference,
 } from "@livekit/components-core";
-import {
-  type Participant,
-  type RemoteAudioTrack,
-  type Room,
-  Track,
-} from "livekit-client";
+import { type RemoteAudioTrack } from "livekit-client";
 import { type ReactNode } from "react";
 import { useTracks } from "@livekit/components-react";
 
 import { testAudioContext } from "../useAudioContext.test";
 import * as MediaDevicesContext from "../MediaDevicesContext";
-import { LivekitRoomAudioRenderer } from "./MatrixAudioRenderer";
-import {
-  mockMediaDevices,
-  mockRemoteParticipant,
-  mockTrack,
-} from "../utils/test";
+import { MatrixAudioRenderer } from "./MatrixAudioRenderer";
+import { mockMediaDevices, mockTrack } from "../utils/test";
 
 export const TestAudioContextConstructor = vi.fn(() => testAudioContext);
 
@@ -56,203 +48,42 @@ vi.mock("@livekit/components-react", async (importOriginal) => {
   };
 });
 
-let tracks: TrackReference[] = [];
-
-/**
- * Render the test component with given rtc members and livekit participant identities.
- *
- * It is possible to have rtc members that are not in livekit (e.g. not yet joined) and vice versa.
- *
- * @param rtcMembers - Array of active rtc members with userId and deviceId.
- * @param livekitParticipantIdentities - Array of livekit participant (that are publishing).
- * @param explicitTracks - Array of tracks available in livekit, if not provided, one audio track per livekitParticipantIdentities will be created.
- * */
-
-function renderTestComponent(
-  rtcMembers: { userId: string; deviceId: string }[],
-  livekitParticipantIdentities: string[],
-  explicitTracks?: {
-    participantId: string;
-    kind: Track.Kind;
-    source: Track.Source;
-  }[],
-): RenderResult {
-  const liveKitParticipants = livekitParticipantIdentities.map((identity) =>
-    mockRemoteParticipant({ identity }),
-  );
-  const participants = rtcMembers.flatMap(({ userId, deviceId }) => {
-    const p = liveKitParticipants.find(
-      (p) => p.identity === `${userId}:${deviceId}`,
-    );
-    return p === undefined ? [] : [p];
-  });
-  const livekitRoom = {
-    remoteParticipants: new Map<string, Participant>(
-      liveKitParticipants.map((p) => [p.identity, p]),
-    ),
-  } as unknown as Room;
-
-  if (explicitTracks?.length ?? 0 > 0) {
-    tracks = explicitTracks!.map(({ participantId, source, kind }) => {
-      const participant =
-        liveKitParticipants.find((p) => p.identity === participantId) ??
-        mockRemoteParticipant({ identity: participantId });
-      return mockTrack(participant, kind, source);
-    });
-  } else {
-    tracks = participants.map((p) => mockTrack(p));
-  }
-
-  vi.mocked(useTracks).mockReturnValue(tracks);
-  return render(
-    <MediaDevicesProvider value={mockMediaDevices({})}>
-      <LivekitRoomAudioRenderer
-        validIdentities={participants.map((p) => p.identity)}
-        livekitRoom={livekitRoom}
-        url={""}
-      />
-    </MediaDevicesProvider>,
-  );
-}
+const tracks = [mockTrack("test:123")];
+vi.mocked(useTracks).mockReturnValue(tracks);
 
 it("should render for member", () => {
-  const { container, queryAllByTestId } = renderTestComponent(
-    [{ userId: "@alice", deviceId: "DEV0" }],
-    ["@alice:DEV0"],
+  const { container, queryAllByTestId } = render(
+    <MediaDevicesProvider value={mockMediaDevices({})}>
+      <MatrixAudioRenderer
+        members={[{ sender: "test", deviceId: "123" }] as CallMembership[]}
+      />
+    </MediaDevicesProvider>,
   );
   expect(container).toBeTruthy();
   expect(queryAllByTestId("audio")).toHaveLength(1);
 });
 
 it("should not render without member", () => {
-  const { container, queryAllByTestId } = renderTestComponent(
-    [{ userId: "@bob", deviceId: "DEV0" }],
-    ["@alice:DEV0"],
+  const memberships = [
+    { sender: "othermember", deviceId: "123" },
+  ] as CallMembership[];
+  const { container, queryAllByTestId } = render(
+    <MediaDevicesProvider value={mockMediaDevices({})}>
+      <MatrixAudioRenderer members={memberships} />
+    </MediaDevicesProvider>,
   );
   expect(container).toBeTruthy();
   expect(queryAllByTestId("audio")).toHaveLength(0);
 });
 
-const TEST_CASES: {
-  name: string;
-  rtcUsers: { userId: string; deviceId: string }[];
-  livekitParticipantIdentities: string[];
-  explicitTracks?: {
-    participantId: string;
-    kind: Track.Kind;
-    source: Track.Source;
-  }[];
-  expectedAudioTracks: number;
-}[] = [
-  {
-    name: "single user single device",
-    rtcUsers: [
-      { userId: "@alice", deviceId: "DEV0" },
-      { userId: "@alice", deviceId: "DEV1" },
-      { userId: "@bob", deviceId: "DEV0" },
-    ],
-    livekitParticipantIdentities: ["@alice:DEV0", "@bob:DEV0", "@alice:DEV1"],
-    expectedAudioTracks: 3,
-  },
-  // Charlie is a rtc member but not in livekit
-  {
-    name: "Charlie is rtc member but not in livekit",
-    rtcUsers: [
-      { userId: "@alice", deviceId: "DEV0" },
-      { userId: "@bob", deviceId: "DEV0" },
-      { userId: "@charlie", deviceId: "DEV0" },
-    ],
-    livekitParticipantIdentities: ["@alice:DEV0", "@bob:DEV0"],
-    expectedAudioTracks: 2,
-  },
-  // Charlie is in livekit but not rtc member
-  {
-    name: "Charlie is in livekit but not rtc member",
-    rtcUsers: [
-      { userId: "@alice", deviceId: "DEV0" },
-      { userId: "@bob", deviceId: "DEV0" },
-    ],
-    livekitParticipantIdentities: ["@alice:DEV0", "@bob:DEV0", "@charlie:DEV0"],
-    expectedAudioTracks: 2,
-  },
-  {
-    name: "no audio track, only video track",
-    rtcUsers: [{ userId: "@alice", deviceId: "DEV0" }],
-    livekitParticipantIdentities: ["@alice:DEV0"],
-    explicitTracks: [
-      {
-        participantId: "@alice:DEV0",
-        kind: Track.Kind.Video,
-        source: Track.Source.Camera,
-      },
-    ],
-    expectedAudioTracks: 0,
-  },
-  {
-    name: "Audio track from unknown source",
-    rtcUsers: [{ userId: "@alice", deviceId: "DEV0" }],
-    livekitParticipantIdentities: ["@alice:DEV0"],
-    explicitTracks: [
-      {
-        participantId: "@alice:DEV0",
-        kind: Track.Kind.Audio,
-        source: Track.Source.Unknown,
-      },
-    ],
-    expectedAudioTracks: 1,
-  },
-  {
-    name: "Audio track from other device",
-    rtcUsers: [{ userId: "@alice", deviceId: "DEV0" }],
-    livekitParticipantIdentities: ["@alice:DEV0"],
-    explicitTracks: [
-      {
-        participantId: "@alice:DEV1",
-        kind: Track.Kind.Audio,
-        source: Track.Source.Microphone,
-      },
-    ],
-    expectedAudioTracks: 0,
-  },
-  {
-    name: "two audio tracks, microphone and screenshare",
-    rtcUsers: [{ userId: "@alice", deviceId: "DEV0" }],
-    livekitParticipantIdentities: ["@alice:DEV0"],
-    explicitTracks: [
-      {
-        participantId: "@alice:DEV0",
-        kind: Track.Kind.Audio,
-        source: Track.Source.Microphone,
-      },
-      {
-        participantId: "@alice:DEV0",
-        kind: Track.Kind.Audio,
-        source: Track.Source.ScreenShareAudio,
-      },
-    ],
-    expectedAudioTracks: 2,
-  },
-];
-
-it.each(TEST_CASES)(
-  `should render sound test cases $name`,
-  ({
-    rtcUsers,
-    livekitParticipantIdentities,
-    explicitTracks,
-    expectedAudioTracks,
-  }) => {
-    const { queryAllByTestId } = renderTestComponent(
-      rtcUsers,
-      livekitParticipantIdentities,
-      explicitTracks,
-    );
-    expect(queryAllByTestId("audio")).toHaveLength(expectedAudioTracks);
-  },
-);
-
 it("should not setup audioContext gain and pan if there is no need to.", () => {
-  renderTestComponent([{ userId: "@bob", deviceId: "DEV0" }], ["@bob:DEV0"]);
+  render(
+    <MediaDevicesProvider value={mockMediaDevices({})}>
+      <MatrixAudioRenderer
+        members={[{ sender: "test", deviceId: "123" }] as CallMembership[]}
+      />
+    </MediaDevicesProvider>,
+  );
   const audioTrack = tracks[0].publication.track! as RemoteAudioTrack;
 
   expect(audioTrack.setAudioContext).toHaveBeenCalledTimes(1);
@@ -269,8 +100,13 @@ it("should setup audioContext gain and pan", () => {
     pan: 1,
     volume: 0.1,
   });
-
-  renderTestComponent([{ userId: "@bob", deviceId: "DEV0" }], ["@bob:DEV0"]);
+  render(
+    <MediaDevicesProvider value={mockMediaDevices({})}>
+      <MatrixAudioRenderer
+        members={[{ sender: "test", deviceId: "123" }] as CallMembership[]}
+      />
+    </MediaDevicesProvider>,
+  );
 
   const audioTrack = tracks[0].publication.track! as RemoteAudioTrack;
   expect(audioTrack.setAudioContext).toHaveBeenCalled();

src/livekit/MatrixAudioRenderer.tsx

@@ -6,16 +6,15 @@ Please see LICENSE in the repository root for full details.
 */
 
 import { getTrackReferenceId } from "@livekit/components-core";
-import { type Room as LivekitRoom } from "livekit-client";
 import { type RemoteAudioTrack, Track } from "livekit-client";
-import { useEffect, useMemo, useState, type ReactNode } from "react";
+import { useEffect, useMemo, useRef, useState, type ReactNode } from "react";
 import {
   useTracks,
   AudioTrack,
   type AudioTrackProps,
 } from "@livekit/components-react";
+import { type CallMembership } from "matrix-js-sdk/lib/matrixrtc";
 import { logger } from "matrix-js-sdk/lib/logger";
-import { type ParticipantId } from "matrix-js-sdk/lib/matrixrtc";
 
 import { useEarpieceAudioConfig } from "../MediaDevicesContext";
 import { useReactiveState } from "../useReactiveState";
@@ -23,16 +22,11 @@ import * as controls from "../controls";
 
 export interface MatrixAudioRendererProps {
   /**
-   * The service URL of the LiveKit room.
-   */
-  url: string;
-  livekitRoom: LivekitRoom;
-  /**
-   * The list of participant identities to render audio for.
+   * The list of participants to render audio for.
    * This list needs to be composed based on the matrixRTC members so that we do not play audio from users
-   * that are not expected to be in the rtc session (local user is excluded).
+   * that are not expected to be in the rtc session.
    */
-  validIdentities: ParticipantId[];
+  members: CallMembership[];
   /**
    * If set to `true`, mutes all audio tracks rendered by the component.
    * @remarks
@@ -41,9 +35,9 @@ export interface MatrixAudioRendererProps {
   muted?: boolean;
 }
 
-const prefixedLogger = logger.getChild("[MatrixAudioRenderer]");
 /**
- * Takes care of handling remote participants’ audio tracks and makes sure that microphones and screen share are audible.
+ * The `MatrixAudioRenderer` component is a drop-in solution for adding audio to your LiveKit app.
+ * It takes care of handling remote participants’ audio tracks and makes sure that microphones and screen share are audible.
  *
  * It also takes care of the earpiece audio configuration for iOS devices.
  * This is done by using the WebAudio API to create a stereo pan effect that mimics the earpiece audio.
@@ -55,12 +49,35 @@ const prefixedLogger = logger.getChild("[MatrixAudioRenderer]");
  * ```
  * @public
  */
-export function LivekitRoomAudioRenderer({
-  url,
-  livekitRoom,
-  validIdentities,
+export function MatrixAudioRenderer({
+  members,
   muted,
 }: MatrixAudioRendererProps): ReactNode {
+  const validIdentities = useMemo(
+    () =>
+      new Set(members?.map((member) => `${member.sender}:${member.deviceId}`)),
+    [members],
+  );
+
+  const loggedInvalidIdentities = useRef(new Set<string>());
+
+  /**
+   * Log an invalid livekit track identity.
+   * A invalid identity is one that does not match any of the matrix rtc members.
+   *
+   * @param identity The identity of the track that is invalid
+   * @param validIdentities The list of valid identities
+   */
+  const logInvalid = (identity: string, validIdentities: Set<string>): void => {
+    if (loggedInvalidIdentities.current.has(identity)) return;
+    logger.warn(
+      `[MatrixAudioRenderer] Audio track ${identity} has no matching matrix call member`,
+      `current members: ${Array.from(validIdentities.values())}`,
+      `track will not get rendered`,
+    );
+    loggedInvalidIdentities.current.add(identity);
+  };
+
   const tracks = useTracks(
     [
       Track.Source.Microphone,
@@ -70,25 +87,25 @@ export function LivekitRoomAudioRenderer({
     {
       updateOnlyOn: [],
       onlySubscribed: true,
-      room: livekitRoom,
     },
-  )
-    // Only keep audio tracks
-    .filter((ref) => ref.publication.kind === Track.Kind.Audio)
-    // Only keep tracks from participants that are in the validIdentities list
-    .filter((ref) => {
-      const isValid = validIdentities.includes(ref.participant.identity);
-      if (!isValid) {
-        // Log that there is an invalid identity, that means that someone is publishing audio that is not expected to be in the call.
-        prefixedLogger.warn(
-          `Audio track ${ref.participant.identity} from ${url} has no matching matrix call member`,
-          `current members: ${validIdentities.join()}`,
-          `track will not get rendered`,
-        );
-        return false;
-      }
-      return true;
-    });
+  ).filter((ref) => {
+    const isValid = validIdentities?.has(ref.participant.identity);
+    if (!isValid && !ref.participant.isLocal)
+      logInvalid(ref.participant.identity, validIdentities);
+    return (
+      !ref.participant.isLocal &&
+      ref.publication.kind === Track.Kind.Audio &&
+      isValid
+    );
+  });
+  useEffect(() => {
+    if (!tracks.some((t) => !validIdentities.has(t.participant.identity))) {
+      logger.debug(
+        `[MatrixAudioRenderer] All audio tracks have a matching matrix call member identity.`,
+      );
+      loggedInvalidIdentities.current.clear();
+    }
+  }, [tracks, validIdentities]);
 
   // This component is also (in addition to the "only play audio for connected members" logic above)
   // responsible for mimicking earpiece audio on iPhones.
@@ -166,11 +183,7 @@ interface StereoPanAudioTrackProps {
  * It main purpose is to remount the AudioTrack component when switching from
  * audioContext to normal audio playback.
  * As of now the AudioTrack component does not support adding audio nodes while being mounted.
- * @param props The component props
- * @param props.trackRef The track reference
- * @param props.muted If the track should be muted
- * @param props.audioContext The audio context to use
- * @param props.audioNodes The audio nodes to use
+ * @param param0
  * @returns
  */
 function AudioTrackWithAudioNodes({

src/livekit/TrackProcessorContext.tsx

@@ -19,22 +19,14 @@ import {
   useMemo,
 } from "react";
 import { type LocalVideoTrack } from "livekit-client";
-import { combineLatest, map, type Observable } from "rxjs";
-import { useObservable } from "observable-hooks";
 
 import {
   backgroundBlur as backgroundBlurSettings,
   useSetting,
 } from "../settings/settings";
 import { BlurBackgroundTransformer } from "./BlurBackgroundTransformer";
-import { type Behavior } from "../state/Behavior";
-import { type ObservableScope } from "../state/ObservableScope";
 
-//TODO-MULTI-SFU: This is not yet fully there.
-// it is a combination of exposing observable and react hooks.
-// preferably we should not make this a context anymore and instead just a vm?
-
-export type ProcessorState = {
+type ProcessorState = {
   supported: boolean | undefined;
   processor: undefined | ProcessorWrapper<BackgroundOptions>;
 };
@@ -50,43 +42,6 @@ export function useTrackProcessor(): ProcessorState {
   return state;
 }
 
-export function useTrackProcessorObservable$(): Observable<ProcessorState> {
-  const state = use(ProcessorContext);
-  if (state === undefined)
-    throw new Error(
-      "useTrackProcessor must be used within a ProcessorProvider",
-    );
-  const state$ = useObservable(
-    (init$) => init$.pipe(map(([init]) => init)),
-    [state],
-  );
-
-  return state$;
-}
-
-/**
- * Updates your video tracks to always use the given processor.
- */
-export const trackProcessorSync = (
-  scope: ObservableScope,
-  videoTrack$: Behavior<LocalVideoTrack | null>,
-  processor$: Behavior<ProcessorState>,
-): void => {
-  combineLatest([videoTrack$, processor$])
-    .pipe(scope.bind())
-    .subscribe(([videoTrack, processorState]) => {
-      if (!processorState) return;
-      if (!videoTrack) return;
-      const { processor } = processorState;
-      if (processor && !videoTrack.getProcessor()) {
-        void videoTrack.setProcessor(processor);
-      }
-      if (!processor && videoTrack.getProcessor()) {
-        void videoTrack.stopProcessor();
-      }
-    });
-};
-
 export const useTrackProcessorSync = (
   videoTrack: LocalVideoTrack | null,
 ): void => {

src/livekit/openIDSFU.test.ts

@@ -1,112 +0,0 @@
-/*
-Copyright 2025 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-import {
-  beforeEach,
-  afterEach,
-  describe,
-  expect,
-  it,
-  type MockedObject,
-  vitest,
-} from "vitest";
-import fetchMock from "fetch-mock";
-
-import { getSFUConfigWithOpenID, type OpenIDClientParts } from "./openIDSFU";
-import { testJWTToken } from "../utils/test-fixtures";
-
-const sfuUrl = "https://sfu.example.org";
-
-describe("getSFUConfigWithOpenID", () => {
-  let matrixClient: MockedObject<OpenIDClientParts>;
-  beforeEach(() => {
-    matrixClient = {
-      getOpenIdToken: vitest.fn(),
-      getDeviceId: vitest.fn(),
-    };
-  });
-  afterEach(() => {
-    vitest.clearAllMocks();
-    fetchMock.reset();
-  });
-  it("should handle fetching a token", async () => {
-    fetchMock.post("https://sfu.example.org/sfu/get", () => {
-      return {
-        status: 200,
-        body: { url: sfuUrl, jwt: testJWTToken },
-      };
-    });
-    const config = await getSFUConfigWithOpenID(
-      matrixClient,
-      "https://sfu.example.org",
-      "!example_room_id",
-    );
-    expect(config).toEqual({
-      jwt: testJWTToken,
-      url: sfuUrl,
-      livekitIdentity: "@me:example.org:ABCDEF",
-      livekitAlias: "!example_room_id",
-    });
-    void (await fetchMock.flush());
-  });
-  it("should fail if the SFU errors", async () => {
-    fetchMock.post("https://sfu.example.org/sfu/get", () => {
-      return {
-        status: 500,
-        body: { error: "Test failure" },
-      };
-    });
-    try {
-      await getSFUConfigWithOpenID(
-        matrixClient,
-        "https://sfu.example.org",
-        "!example_room_id",
-      );
-    } catch (ex) {
-      expect(((ex as Error).cause as Error).message).toEqual(
-        "SFU Config fetch failed with status code 500",
-      );
-      void (await fetchMock.flush());
-      return;
-    }
-    expect.fail("Expected test to throw;");
-  });
-
-  it("should retry fetching the openid token", async () => {
-    let count = 0;
-    matrixClient.getOpenIdToken.mockImplementation(async () => {
-      count++;
-      if (count < 2) {
-        throw Error("Test failure");
-      }
-      return Promise.resolve({
-        token_type: "Bearer",
-        access_token: "foobar",
-        matrix_server_name: "example.org",
-        expires_in: 30,
-      });
-    });
-    fetchMock.post("https://sfu.example.org/sfu/get", () => {
-      return {
-        status: 200,
-        body: { url: sfuUrl, jwt: testJWTToken },
-      };
-    });
-    const config = await getSFUConfigWithOpenID(
-      matrixClient,
-      "https://sfu.example.org",
-      "!example_room_id",
-    );
-    expect(config).toEqual({
-      jwt: testJWTToken,
-      url: sfuUrl,
-      livekitIdentity: "@me:example.org:ABCDEF",
-      livekitAlias: "!example_room_id",
-    });
-    void (await fetchMock.flush());
-  });
-});

src/livekit/openIDSFU.ts

@@ -7,51 +7,25 @@ Please see LICENSE in the repository root for full details.
 
 import { type IOpenIDToken, type MatrixClient } from "matrix-js-sdk";
 import { logger } from "matrix-js-sdk/lib/logger";
+import { type MatrixRTCSession } from "matrix-js-sdk/lib/matrixrtc";
+import { useEffect, useState } from "react";
+import { type LivekitFocus } from "matrix-js-sdk/lib/matrixrtc";
 
+import { useActiveLivekitFocus } from "../room/useActiveFocus";
+import { useErrorBoundary } from "../useErrorBoundary";
 import { FailToGetOpenIdToken } from "../utils/errors";
 import { doNetworkOperationWithRetry } from "../utils/matrix";
 
-/**
- * Configuration and access tokens provided by the SFU on successful authentication.
- */
 export interface SFUConfig {
   url: string;
   jwt: string;
-  livekitAlias: string;
-  livekitIdentity: string;
 }
 
-/**
- * Decoded details from the JWT.
- */
-interface SFUJWTPayload {
-  /**
-   * Expiration time for the JWT.
-   * Note: This value is in seconds since Unix epoch.
-   */
-  exp: number;
-  /**
-   * Name of the instance which authored the JWT
-   */
-  iss: string;
-  /**
-   * Time at which the JWT can start to be used.
-   * Note: This value is in seconds since Unix epoch.
-   */
-  nbf: number;
-  /**
-   * Subject. The Livekit alias in this context.
-   */
-  sub: string;
-  /**
-   * The set of permissions for the user.
-   */
-  video: {
-    canPublish: boolean;
-    canSubscribe: boolean;
-    room: string;
-    roomJoin: boolean;
-  };
+export function sfuConfigEquals(a?: SFUConfig, b?: SFUConfig): boolean {
+  if (a === undefined && b === undefined) return true;
+  if (a === undefined || b === undefined) return false;
+
+  return a.jwt === b.jwt && a.url === b.url;
 }
 
 // The bits we need from MatrixClient
@@ -59,21 +33,39 @@ export type OpenIDClientParts = Pick<
   MatrixClient,
   "getOpenIdToken" | "getDeviceId"
 >;
-/**
- * Gets a bearer token from the homeserver and then use it to authenticate
- * to the matrix RTC backend in order to get acces to the SFU.
- * It has built-in retry for calls to the homeserver with a backoff policy.
- * @param client The Matrix client
- * @param serviceUrl The URL of the livekit SFU service
- * @param matrixRoomId The Matrix room ID for which to get the SFU config
- * @returns Object containing the token information
- * @throws FailToGetOpenIdToken
- */
+
+export function useOpenIDSFU(
+  client: OpenIDClientParts,
+  rtcSession: MatrixRTCSession,
+): SFUConfig | undefined {
+  const [sfuConfig, setSFUConfig] = useState<SFUConfig | undefined>(undefined);
+
+  const activeFocus = useActiveLivekitFocus(rtcSession);
+  const { showErrorBoundary } = useErrorBoundary();
+
+  useEffect(() => {
+    if (activeFocus) {
+      getSFUConfigWithOpenID(client, activeFocus).then(
+        (sfuConfig) => {
+          setSFUConfig(sfuConfig);
+        },
+        (e) => {
+          showErrorBoundary(new FailToGetOpenIdToken(e));
+          logger.error("Failed to get SFU config", e);
+        },
+      );
+    } else {
+      setSFUConfig(undefined);
+    }
+  }, [client, activeFocus, showErrorBoundary]);
+
+  return sfuConfig;
+}
+
 export async function getSFUConfigWithOpenID(
   client: OpenIDClientParts,
-  serviceUrl: string,
-  matrixRoomId: string,
-): Promise<SFUConfig> {
+  activeFocus: LivekitFocus,
+): Promise<SFUConfig | undefined> {
   let openIdToken: IOpenIDToken;
   try {
     openIdToken = await doNetworkOperationWithRetry(async () =>
@@ -86,26 +78,26 @@ export async function getSFUConfigWithOpenID(
   }
   logger.debug("Got openID token", openIdToken);
 
-  logger.info(`Trying to get JWT for focus ${serviceUrl}...`);
-  const sfuConfig = await getLiveKitJWT(
-    client,
-    serviceUrl,
-    matrixRoomId,
-    openIdToken,
-  );
-  logger.info(`Got JWT from call's active focus URL.`);
+  try {
+    logger.info(
+      `Trying to get JWT from call's active focus URL of ${activeFocus.livekit_service_url}...`,
+    );
+    const sfuConfig = await getLiveKitJWT(
+      client,
+      activeFocus.livekit_service_url,
+      activeFocus.livekit_alias,
+      openIdToken,
+    );
+    logger.info(`Got JWT from call's active focus URL.`);
 
-  // Pull the details from the JWT
-  const [, payloadStr] = sfuConfig.jwt.split(".");
-  // TODO: Prefer Uint8Array.fromBase64 when widely available
-  const payload = JSON.parse(global.atob(payloadStr)) as SFUJWTPayload;
-  return {
-    jwt: sfuConfig.jwt,
-    url: sfuConfig.url,
-    livekitAlias: payload.video.room,
-    // NOTE: Currently unused.
-    livekitIdentity: payload.sub,
-  };
+    return sfuConfig;
+  } catch (e) {
+    logger.warn(
+      `Failed to get JWT from RTC session's active focus URL of ${activeFocus.livekit_service_url}.`,
+      e,
+    );
+    return undefined;
+  }
 }
 
 async function getLiveKitJWT(
@@ -113,7 +105,7 @@ async function getLiveKitJWT(
   livekitServiceURL: string,
   roomName: string,
   openIDToken: IOpenIDToken,
-): Promise<{ url: string; jwt: string }> {
+): Promise<SFUConfig> {
   try {
     const res = await fetch(livekitServiceURL + "/sfu/get", {
       method: "POST",
@@ -131,6 +123,6 @@ async function getLiveKitJWT(
     }
     return await res.json();
   } catch (e) {
-    throw new Error("SFU Config fetch failed with exception", { cause: e });
+    throw new Error("SFU Config fetch failed with exception " + e);
   }
 }

src/livekit/useECConnectionState.test.tsx

@@ -0,0 +1,184 @@
+/*
+Copyright 2025 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { type FC, useCallback, useState } from "react";
+import { describe, expect, test, vi, vitest } from "vitest";
+import {
+  ConnectionError,
+  ConnectionErrorReason,
+  type Room,
+} from "livekit-client";
+import userEvent from "@testing-library/user-event";
+import { render, screen } from "@testing-library/react";
+import { MemoryRouter } from "react-router-dom";
+import { sleep } from "matrix-js-sdk/lib/utils";
+
+import { useECConnectionState } from "./useECConnectionState";
+import { type SFUConfig } from "./openIDSFU";
+import { GroupCallErrorBoundary } from "../room/GroupCallErrorBoundary.tsx";
+
+test.each<[string, ConnectionError]>([
+  [
+    "LiveKit hits track limit",
+    new ConnectionError("", ConnectionErrorReason.InternalError, 503),
+  ],
+  [
+    "LiveKit hits room participant limit",
+    new ConnectionError("", ConnectionErrorReason.ServerUnreachable, 200),
+  ],
+  [
+    "LiveKit Cloud hits connection limit",
+    new ConnectionError("", ConnectionErrorReason.NotAllowed, 429),
+  ],
+])(
+  "useECConnectionState throws error when %s hits track limit",
+  async (_server, error) => {
+    const mockRoom = {
+      on: () => {},
+      off: () => {},
+      once: () => {},
+      connect: () => {
+        throw error;
+      },
+      localParticipant: {
+        getTrackPublication: () => {},
+        createTracks: () => [],
+      },
+    } as unknown as Room;
+
+    const TestComponent: FC = () => {
+      const [sfuConfig, setSfuConfig] = useState<SFUConfig | undefined>(
+        undefined,
+      );
+      const connect = useCallback(
+        () => setSfuConfig({ url: "URL", jwt: "JWT token" }),
+        [],
+      );
+      useECConnectionState("default", false, mockRoom, sfuConfig);
+      return <button onClick={connect}>Connect</button>;
+    };
+
+    const user = userEvent.setup();
+    render(
+      <MemoryRouter>
+        <GroupCallErrorBoundary recoveryActionHandler={vi.fn()} widget={null}>
+          <TestComponent />
+        </GroupCallErrorBoundary>
+      </MemoryRouter>,
+    );
+    await user.click(screen.getByRole("button", { name: "Connect" }));
+    screen.getByText("Insufficient capacity");
+  },
+);
+
+describe("Leaking connection prevention", () => {
+  function createTestComponent(mockRoom: Room): FC {
+    const TestComponent: FC = () => {
+      const [sfuConfig, setSfuConfig] = useState<SFUConfig | undefined>(
+        undefined,
+      );
+      const connect = useCallback(
+        () => setSfuConfig({ url: "URL", jwt: "JWT token" }),
+        [],
+      );
+      useECConnectionState("default", false, mockRoom, sfuConfig);
+      return <button onClick={connect}>Connect</button>;
+    };
+    return TestComponent;
+  }
+
+  test("Should cancel pending connections when the component is unmounted", async () => {
+    const connectCall = vi.fn();
+    const pendingConnection = Promise.withResolvers<void>();
+    // let pendingDisconnection = Promise.withResolvers<void>()
+    const disconnectMock = vi.fn();
+
+    const mockRoom = {
+      on: () => {},
+      off: () => {},
+      once: () => {},
+      connect: async () => {
+        connectCall.call(undefined);
+        return await pendingConnection.promise;
+      },
+      disconnect: disconnectMock,
+      localParticipant: {
+        getTrackPublication: () => {},
+        createTracks: () => [],
+      },
+    } as unknown as Room;
+
+    const TestComponent = createTestComponent(mockRoom);
+
+    const { unmount } = render(<TestComponent />);
+    const user = userEvent.setup();
+    await user.click(screen.getByRole("button", { name: "Connect" }));
+
+    expect(connectCall).toHaveBeenCalled();
+    // unmount while the connection is pending
+    unmount();
+
+    // resolve the pending connection
+    pendingConnection.resolve();
+
+    await vitest.waitUntil(
+      () => {
+        return disconnectMock.mock.calls.length > 0;
+      },
+      {
+        timeout: 1000,
+        interval: 100,
+      },
+    );
+
+    // There should be some cleaning up to avoid leaking an open connection
+    expect(disconnectMock).toHaveBeenCalledTimes(1);
+  });
+
+  test("Should cancel about to open but not yet opened connection", async () => {
+    const createTracksCall = vi.fn();
+    const pendingCreateTrack = Promise.withResolvers<void>();
+    // let pendingDisconnection = Promise.withResolvers<void>()
+    const disconnectMock = vi.fn();
+    const connectMock = vi.fn();
+
+    const mockRoom = {
+      on: () => {},
+      off: () => {},
+      once: () => {},
+      connect: connectMock,
+      disconnect: disconnectMock,
+      localParticipant: {
+        getTrackPublication: () => {},
+        createTracks: async () => {
+          createTracksCall.call(undefined);
+          await pendingCreateTrack.promise;
+          return [];
+        },
+      },
+    } as unknown as Room;
+
+    const TestComponent = createTestComponent(mockRoom);
+
+    const { unmount } = render(<TestComponent />);
+    const user = userEvent.setup();
+    await user.click(screen.getByRole("button", { name: "Connect" }));
+
+    expect(createTracksCall).toHaveBeenCalled();
+    // unmount while createTracks is pending
+    unmount();
+
+    // resolve createTracks
+    pendingCreateTrack.resolve();
+
+    // Yield to the event loop to let the connection attempt finish
+    await sleep(100);
+
+    // The operation should have been aborted before even calling connect.
+    expect(connectMock).not.toHaveBeenCalled();
+  });
+});

src/livekit/useECConnectionState.ts

@@ -0,0 +1,362 @@
+/*
+Copyright 2023, 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import {
+  ConnectionError,
+  ConnectionState,
+  type LocalTrack,
+  type Room,
+  RoomEvent,
+  Track,
+} from "livekit-client";
+import { useCallback, useEffect, useRef, useState } from "react";
+import { logger } from "matrix-js-sdk/lib/logger";
+import * as Sentry from "@sentry/react";
+
+import { type SFUConfig, sfuConfigEquals } from "./openIDSFU";
+import { PosthogAnalytics } from "../analytics/PosthogAnalytics";
+import {
+  ElementCallError,
+  InsufficientCapacityError,
+  SFURoomCreationRestrictedError,
+  UnknownCallError,
+} from "../utils/errors.ts";
+import { AbortHandle } from "../utils/abortHandle.ts";
+
+/*
+ * Additional values for states that a call can be in, beyond what livekit
+ * provides in ConnectionState. Also reconnects the call if the SFU Config
+ * changes.
+ */
+export enum ECAddonConnectionState {
+  // We are switching from one focus to another (or between livekit room aliases on the same focus)
+  ECSwitchingFocus = "ec_switching_focus",
+  // The call has just been initialised and is waiting for credentials to arrive before attempting
+  // to connect. This distinguishes from the 'Disconnected' state which is now just for when livekit
+  // gives up on connectivity and we consider the call to have failed.
+  ECWaiting = "ec_waiting",
+}
+
+export type ECConnectionState = ConnectionState | ECAddonConnectionState;
+
+// This is mostly necessary because an empty useRef is an empty object
+// which is truthy, so we can't just use Boolean(currentSFUConfig.current)
+function sfuConfigValid(sfuConfig?: SFUConfig): boolean {
+  return Boolean(sfuConfig?.url) && Boolean(sfuConfig?.jwt);
+}
+
+async function doConnect(
+  livekitRoom: Room,
+  sfuConfig: SFUConfig,
+  audioEnabled: boolean,
+  initialDeviceId: string | undefined,
+  abortHandle: AbortHandle,
+): Promise<void> {
+  // Always create an audio track manually.
+  // livekit (by default) keeps the mic track open when you mute, but if you start muted,
+  // doesn't publish it until you unmute. We want to publish it from the start so we're
+  // always capturing audio: it helps keep bluetooth headsets in the right mode and
+  // mobile browsers to know we're doing a call.
+  if (
+    livekitRoom!.localParticipant.getTrackPublication(Track.Source.Microphone)
+  ) {
+    logger.warn(
+      "Pre-creating audio track but participant already appears to have an microphone track: this shouldn't happen!",
+    );
+    Sentry.captureMessage(
+      "Pre-creating audio track but participant already appears to have an microphone track!",
+    );
+    return;
+  }
+
+  logger.info("Pre-creating microphone track");
+  let preCreatedAudioTrack: LocalTrack | undefined;
+  try {
+    const audioTracks = await livekitRoom!.localParticipant.createTracks({
+      audio: { deviceId: initialDeviceId },
+    });
+
+    if (audioTracks.length < 1) {
+      logger.info("Tried to pre-create local audio track but got no tracks");
+    } else {
+      preCreatedAudioTrack = audioTracks[0];
+    }
+    // There was a yield point previously (awaiting for the track to be created) so we need to check
+    // if the operation was cancelled and stop connecting if needed.
+    if (abortHandle.isAborted()) {
+      logger.info(
+        "[Lifecycle] Signal Aborted: Pre-created audio track but connection aborted",
+      );
+      preCreatedAudioTrack?.stop();
+      return;
+    }
+
+    logger.info("Pre-created microphone track");
+  } catch (e) {
+    logger.error("Failed to pre-create microphone track", e);
+  }
+
+  if (!audioEnabled) {
+    await preCreatedAudioTrack?.mute();
+    // There was a yield point. Check if the operation was cancelled and stop connecting.
+    if (abortHandle.isAborted()) {
+      logger.info(
+        "[Lifecycle] Signal Aborted: Pre-created audio track but connection aborted",
+      );
+      preCreatedAudioTrack?.stop();
+      return;
+    }
+  }
+
+  // check again having awaited for the track to create
+  if (
+    livekitRoom!.localParticipant.getTrackPublication(Track.Source.Microphone)
+  ) {
+    logger.warn(
+      "Pre-created audio track but participant already appears to have an microphone track: this shouldn't happen!",
+    );
+    preCreatedAudioTrack?.stop();
+    return;
+  }
+
+  logger.info("[Lifecycle] Connecting & publishing");
+  try {
+    await connectAndPublish(livekitRoom, sfuConfig, preCreatedAudioTrack, []);
+    if (abortHandle.isAborted()) {
+      logger.info(
+        "[Lifecycle] Signal Aborted: Connected but operation was cancelled. Force disconnect",
+      );
+      livekitRoom?.disconnect().catch((err) => {
+        logger.error("Failed to disconnect from SFU", err);
+      });
+      return;
+    }
+  } catch (e) {
+    preCreatedAudioTrack?.stop();
+    logger.debug("Stopped precreated audio tracks.");
+    throw e;
+  }
+}
+
+/**
+ * Connect to the SFU and publish specific tracks, if provided.
+ * This is very specific to what we need to do: for instance, we don't
+ * currently have a need to prepublish video tracks. We just prepublish
+ * a mic track at the start of a call and copy any srceenshare tracks over
+ * when switching focus (because we can't re-acquire them without the user
+ * going through the dialog to choose them again).
+ */
+async function connectAndPublish(
+  livekitRoom: Room,
+  sfuConfig: SFUConfig,
+  micTrack: LocalTrack | undefined,
+  screenshareTracks: MediaStreamTrack[],
+): Promise<void> {
+  const tracker = PosthogAnalytics.instance.eventCallConnectDuration;
+  // Track call connect duration
+  tracker.cacheConnectStart();
+  livekitRoom.once(RoomEvent.SignalConnected, tracker.cacheWsConnect);
+
+  try {
+    logger.info(`[Lifecycle] Connecting to livekit room ${sfuConfig!.url} ...`);
+    await livekitRoom!.connect(sfuConfig!.url, sfuConfig!.jwt);
+    logger.info(`[Lifecycle] ... connected to livekit room`);
+  } catch (e) {
+    logger.error("[Lifecycle] Failed to connect", e);
+    // LiveKit uses 503 to indicate that the server has hit its track limits.
+    // https://github.com/livekit/livekit/blob/fcb05e97c5a31812ecf0ca6f7efa57c485cea9fb/pkg/service/rtcservice.go#L171
+    // It also errors with a status code of 200 (yes, really) for room
+    // participant limits.
+    // LiveKit Cloud uses 429 for connection limits.
+    // Either way, all these errors can be explained as "insufficient capacity".
+    if (e instanceof ConnectionError) {
+      if (e.status === 503 || e.status === 200 || e.status === 429) {
+        throw new InsufficientCapacityError();
+      }
+      if (e.status === 404) {
+        // error msg is "Could not establish signal connection: requested room does not exist"
+        // The room does not exist. There are two different modes of operation for the SFU:
+        // - the room is created on the fly when connecting (livekit `auto_create` option)
+        // - Only authorized users can create rooms, so the room must exist before connecting (done by the auth jwt service)
+        // In the first case there will not be a 404, so we are in the second case.
+        throw new SFURoomCreationRestrictedError();
+      }
+    }
+    throw e;
+  }
+
+  // remove listener in case the connect promise rejects before `SignalConnected` is emitted.
+  livekitRoom.off(RoomEvent.SignalConnected, tracker.cacheWsConnect);
+  tracker.track({ log: true });
+
+  if (micTrack) {
+    logger.info(`Publishing precreated mic track`);
+    await livekitRoom.localParticipant.publishTrack(micTrack, {
+      source: Track.Source.Microphone,
+    });
+  }
+
+  logger.info(
+    `Publishing ${screenshareTracks.length} precreated screenshare tracks`,
+  );
+  for (const st of screenshareTracks) {
+    livekitRoom.localParticipant
+      .publishTrack(st, {
+        source: Track.Source.ScreenShare,
+      })
+      .catch((e) => {
+        logger.error("Failed to publish screenshare track", e);
+      });
+  }
+}
+
+export function useECConnectionState(
+  initialDeviceId: string | undefined,
+  initialAudioEnabled: boolean,
+  livekitRoom?: Room,
+  sfuConfig?: SFUConfig,
+): ECConnectionState {
+  const [connState, setConnState] = useState(
+    sfuConfig && livekitRoom
+      ? livekitRoom.state
+      : ECAddonConnectionState.ECWaiting,
+  );
+
+  const [isSwitchingFocus, setSwitchingFocus] = useState(false);
+  const [isInDoConnect, setIsInDoConnect] = useState(false);
+  const [error, setError] = useState<ElementCallError | null>(null);
+  if (error !== null) throw error;
+
+  const onConnStateChanged = useCallback((state: ConnectionState) => {
+    if (state == ConnectionState.Connected) setSwitchingFocus(false);
+    setConnState(state);
+  }, []);
+
+  useEffect(() => {
+    const oldRoom = livekitRoom;
+
+    if (livekitRoom) {
+      livekitRoom.on(RoomEvent.ConnectionStateChanged, onConnStateChanged);
+    }
+
+    return (): void => {
+      if (oldRoom)
+        oldRoom.off(RoomEvent.ConnectionStateChanged, onConnStateChanged);
+    };
+  }, [livekitRoom, onConnStateChanged]);
+
+  const doFocusSwitch = useCallback(async (): Promise<void> => {
+    const screenshareTracks: MediaStreamTrack[] = [];
+    for (const t of livekitRoom!.localParticipant.videoTrackPublications.values()) {
+      if (t.track && t.source == Track.Source.ScreenShare) {
+        const newTrack = t.track.mediaStreamTrack.clone();
+        newTrack.enabled = true;
+        screenshareTracks.push(newTrack);
+      }
+    }
+
+    // Flag that we're currently switching focus. This will get reset when the
+    // connection state changes back to connected in onConnStateChanged above.
+    setSwitchingFocus(true);
+    await livekitRoom?.disconnect();
+    setIsInDoConnect(true);
+    try {
+      await connectAndPublish(
+        livekitRoom!,
+        sfuConfig!,
+        undefined,
+        screenshareTracks,
+      );
+    } finally {
+      setIsInDoConnect(false);
+    }
+  }, [livekitRoom, sfuConfig]);
+
+  const currentSFUConfig = useRef(Object.assign({}, sfuConfig));
+
+  // Protection against potential leaks, where the component to be unmounted and there is
+  // still a pending doConnect promise. This would lead the user to still be in the call even
+  // if the component is unmounted.
+  const abortHandlesBag = useRef(new Set<AbortHandle>());
+
+  // This is a cleanup function that will be called when the component is about to be unmounted.
+  // It will cancel all abortHandles in the bag
+  useEffect(() => {
+    const bag = abortHandlesBag.current;
+    return (): void => {
+      bag.forEach((handle) => {
+        handle.abort();
+      });
+    };
+  }, []);
+
+  // Id we are transitioning from a valid config to another valid one, we need
+  // to explicitly switch focus
+  useEffect(() => {
+    if (
+      sfuConfigValid(sfuConfig) &&
+      sfuConfigValid(currentSFUConfig.current) &&
+      !sfuConfigEquals(currentSFUConfig.current, sfuConfig)
+    ) {
+      logger.info(
+        `SFU config changed! URL was ${currentSFUConfig.current?.url} now ${sfuConfig?.url}`,
+      );
+
+      doFocusSwitch().catch((e) => {
+        logger.error("Failed to switch focus", e);
+      });
+    } else if (
+      !sfuConfigValid(currentSFUConfig.current) &&
+      sfuConfigValid(sfuConfig)
+    ) {
+      // if we're transitioning from an invalid config to a valid one (ie. connecting)
+      // then do an initial connection, including publishing the microphone track:
+      // livekit (by default) keeps the mic track open when you mute, but if you start muted,
+      // doesn't publish it until you unmute. We want to publish it from the start so we're
+      // always capturing audio: it helps keep bluetooth headsets in the right mode and
+      // mobile browsers to know we're doing a call.
+      setIsInDoConnect(true);
+      const abortHandle = new AbortHandle();
+      abortHandlesBag.current.add(abortHandle);
+      doConnect(
+        livekitRoom!,
+        sfuConfig!,
+        initialAudioEnabled,
+        initialDeviceId,
+        abortHandle,
+      )
+        .catch((e) => {
+          if (e instanceof ElementCallError) {
+            setError(e); // Bubble up any error screens to React
+          } else if (e instanceof Error) {
+            setError(new UnknownCallError(e));
+          } else logger.error("Failed to connect to SFU", e);
+        })
+        .finally(() => {
+          abortHandlesBag.current.delete(abortHandle);
+          setIsInDoConnect(false);
+        });
+    }
+
+    currentSFUConfig.current = Object.assign({}, sfuConfig);
+  }, [
+    sfuConfig,
+    livekitRoom,
+    initialDeviceId,
+    initialAudioEnabled,
+    doFocusSwitch,
+  ]);
+
+  // Because we create audio tracks by hand, there's more to connecting than
+  // just what LiveKit does in room.connect, and we should continue to return
+  // ConnectionState.Connecting for the entire duration of the doConnect promise
+  return isSwitchingFocus
+    ? ECAddonConnectionState.ECSwitchingFocus
+    : isInDoConnect
+      ? ConnectionState.Connecting
+      : connState;
+}

src/livekit/useLivekit.ts

@@ -0,0 +1,431 @@
+/*
+Copyright 2023, 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import {
+  ConnectionState,
+  type E2EEManagerOptions,
+  ExternalE2EEKeyProvider,
+  type LocalTrackPublication,
+  LocalVideoTrack,
+  Room,
+  type RoomOptions,
+  Track,
+} from "livekit-client";
+import { useEffect, useRef } from "react";
+import E2EEWorker from "livekit-client/e2ee-worker?worker";
+import { logger } from "matrix-js-sdk/lib/logger";
+import { type MatrixRTCSession } from "matrix-js-sdk/lib/matrixrtc";
+import { useObservable, useObservableEagerState } from "observable-hooks";
+import {
+  map,
+  NEVER,
+  type Observable,
+  type Subscription,
+  switchMap,
+} from "rxjs";
+
+import { defaultLiveKitOptions } from "./options";
+import { type SFUConfig } from "./openIDSFU";
+import { type MuteStates } from "../room/MuteStates";
+import { useMediaDevices } from "../MediaDevicesContext";
+import {
+  type ECConnectionState,
+  useECConnectionState,
+} from "./useECConnectionState";
+import { MatrixKeyProvider } from "../e2ee/matrixKeyProvider";
+import { E2eeType } from "../e2ee/e2eeType";
+import { type EncryptionSystem } from "../e2ee/sharedKeyManagement";
+import {
+  useTrackProcessor,
+  useTrackProcessorSync,
+} from "./TrackProcessorContext";
+import { observeTrackReference$ } from "../state/MediaViewModel";
+import { useUrlParams } from "../UrlParams";
+import { useInitial } from "../useInitial";
+import { getValue } from "../utils/observable";
+import { type SelectedDevice } from "../state/MediaDevices";
+
+interface UseLivekitResult {
+  livekitRoom?: Room;
+  connState: ECConnectionState;
+}
+
+export function useLivekit(
+  rtcSession: MatrixRTCSession,
+  muteStates: MuteStates,
+  sfuConfig: SFUConfig | undefined,
+  e2eeSystem: EncryptionSystem,
+): UseLivekitResult {
+  const { controlledAudioDevices } = useUrlParams();
+
+  const initialMuteStates = useInitial(() => muteStates);
+
+  const devices = useMediaDevices();
+  const initialAudioInputId = useInitial(
+    () => getValue(devices.audioInput.selected$)?.id,
+  );
+
+  // Store if audio/video are currently updating. If to prohibit unnecessary calls
+  // to setMicrophoneEnabled/setCameraEnabled
+  const audioMuteUpdating = useRef(false);
+  const videoMuteUpdating = useRef(false);
+  // Store the current button mute state that gets passed to this hook via props.
+  // We need to store it for awaited code that relies on the current value.
+  const buttonEnabled = useRef({
+    audio: initialMuteStates.audio.enabled,
+    video: initialMuteStates.video.enabled,
+  });
+
+  const { processor } = useTrackProcessor();
+
+  // Only ever create the room once via useInitial.
+  const room = useInitial(() => {
+    logger.info("[LivekitRoom] Create LiveKit room");
+
+    let e2ee: E2EEManagerOptions | undefined;
+    if (e2eeSystem.kind === E2eeType.PER_PARTICIPANT) {
+      logger.info("Created MatrixKeyProvider (per participant)");
+      e2ee = {
+        keyProvider: new MatrixKeyProvider(),
+        worker: new E2EEWorker(),
+      };
+    } else if (e2eeSystem.kind === E2eeType.SHARED_KEY && e2eeSystem.secret) {
+      logger.info("Created ExternalE2EEKeyProvider (shared key)");
+      e2ee = {
+        keyProvider: new ExternalE2EEKeyProvider(),
+        worker: new E2EEWorker(),
+      };
+    }
+
+    const roomOptions: RoomOptions = {
+      ...defaultLiveKitOptions,
+      videoCaptureDefaults: {
+        ...defaultLiveKitOptions.videoCaptureDefaults,
+        deviceId: getValue(devices.videoInput.selected$)?.id,
+        processor,
+      },
+      audioCaptureDefaults: {
+        ...defaultLiveKitOptions.audioCaptureDefaults,
+        deviceId: initialAudioInputId,
+      },
+      audioOutput: {
+        // When using controlled audio devices, we don't want to set the
+        // deviceId here, because it will be set by the native app.
+        // (also the id does not need to match a browser device id)
+        deviceId: controlledAudioDevices
+          ? undefined
+          : getValue(devices.audioOutput.selected$)?.id,
+      },
+      e2ee,
+    };
+    // We have to create the room manually here due to a bug inside
+    // @livekit/components-react. JSON.stringify() is used in deps of a
+    // useEffect() with an argument that references itself, if E2EE is enabled
+    const room = new Room(roomOptions);
+    room.setE2EEEnabled(e2eeSystem.kind !== E2eeType.NONE).catch((e) => {
+      logger.error("Failed to set E2EE enabled on room", e);
+    });
+
+    return room;
+  });
+
+  // Setup and update the keyProvider which was create by `createRoom`
+  useEffect(() => {
+    const e2eeOptions = room.options.e2ee;
+    if (
+      e2eeSystem.kind === E2eeType.NONE ||
+      !(e2eeOptions && "keyProvider" in e2eeOptions)
+    )
+      return;
+
+    if (e2eeSystem.kind === E2eeType.PER_PARTICIPANT) {
+      (e2eeOptions.keyProvider as MatrixKeyProvider).setRTCSession(rtcSession);
+    } else if (e2eeSystem.kind === E2eeType.SHARED_KEY && e2eeSystem.secret) {
+      (e2eeOptions.keyProvider as ExternalE2EEKeyProvider)
+        .setKey(e2eeSystem.secret)
+        .catch((e) => {
+          logger.error("Failed to set shared key for E2EE", e);
+        });
+    }
+  }, [room.options.e2ee, e2eeSystem, rtcSession]);
+
+  // Sync the requested track processors with LiveKit
+  useTrackProcessorSync(
+    useObservableEagerState(
+      useObservable(
+        (room$) =>
+          room$.pipe(
+            switchMap(([room]) =>
+              observeTrackReference$(
+                room.localParticipant,
+                Track.Source.Camera,
+              ),
+            ),
+            map((trackRef) => {
+              const track = trackRef?.publication?.track;
+              return track instanceof LocalVideoTrack ? track : null;
+            }),
+          ),
+        [room],
+      ),
+    ),
+  );
+
+  const connectionState = useECConnectionState(
+    initialAudioInputId,
+    initialMuteStates.audio.enabled,
+    room,
+    sfuConfig,
+  );
+
+  // Log errors when local participant has issues publishing a track.
+  useEffect(() => {
+    const localTrackUnpublishedFn = (
+      publication: LocalTrackPublication,
+    ): void => {
+      logger.info(
+        "Local track unpublished",
+        publication.trackName,
+        publication.trackInfo,
+      );
+    };
+    const mediaDevicesErrorFn = (error: Error): void => {
+      logger.warn("Media devices error when publishing a track", error);
+    };
+
+    room.localParticipant.on("localTrackUnpublished", localTrackUnpublishedFn);
+    room.localParticipant.on("mediaDevicesError", mediaDevicesErrorFn);
+
+    return (): void => {
+      room.localParticipant.off(
+        "localTrackUnpublished",
+        localTrackUnpublishedFn,
+      );
+      room.localParticipant.off("mediaDevicesError", mediaDevicesErrorFn);
+    };
+  }, [room.localParticipant]);
+
+  useEffect(() => {
+    // Sync the requested mute states with LiveKit's mute states. We do it this
+    // way around rather than using LiveKit as the source of truth, so that the
+    // states can be consistent throughout the lobby and loading screens.
+    // It's important that we only do this in the connected state, because
+    // LiveKit's internal mute states aren't consistent during connection setup,
+    // and setting tracks to be enabled during this time causes errors.
+    if (room !== undefined && connectionState === ConnectionState.Connected) {
+      const participant = room.localParticipant;
+      // Always update the muteButtonState Ref so that we can read the current
+      // state in awaited blocks.
+      buttonEnabled.current = {
+        audio: muteStates.audio.enabled,
+        video: muteStates.video.enabled,
+      };
+
+      enum MuteDevice {
+        Microphone,
+        Camera,
+      }
+
+      const syncMuteState = async (
+        iterCount: number,
+        type: MuteDevice,
+      ): Promise<void> => {
+        // The approach for muting is to always bring the actual livekit state in sync with the button
+        // This allows for a very predictable and reactive behavior for the user.
+        // (the new state is the old state when pressing the button n times (where n is even))
+        // (the new state is different to the old state when pressing the button n times (where n is uneven))
+        // In case there are issues with the device there might be situations where setMicrophoneEnabled/setCameraEnabled
+        // return immediately. This should be caught with the Error("track with new mute state could not be published").
+        // For now we are still using an iterCount to limit the recursion loop to 10.
+        // This could happen if the device just really does not want to turn on (hardware based issue)
+        // but the mute button is in unmute state.
+        // For now our fail mode is to just stay in this state.
+        // TODO: decide for a UX on how that fail mode should be treated (disable button, hide button, sync button back to muted without user input)
+
+        if (iterCount > 10) {
+          logger.error(
+            "Stop trying to sync the input device with current mute state after 10 failed tries",
+          );
+          return;
+        }
+        let devEnabled;
+        let btnEnabled;
+        let updating;
+        switch (type) {
+          case MuteDevice.Microphone:
+            devEnabled = participant.isMicrophoneEnabled;
+            btnEnabled = buttonEnabled.current.audio;
+            updating = audioMuteUpdating.current;
+            break;
+          case MuteDevice.Camera:
+            devEnabled = participant.isCameraEnabled;
+            btnEnabled = buttonEnabled.current.video;
+            updating = videoMuteUpdating.current;
+            break;
+        }
+        if (devEnabled !== btnEnabled && !updating) {
+          try {
+            let trackPublication;
+            switch (type) {
+              case MuteDevice.Microphone:
+                audioMuteUpdating.current = true;
+                trackPublication = await participant.setMicrophoneEnabled(
+                  buttonEnabled.current.audio,
+                  room.options.audioCaptureDefaults,
+                );
+                audioMuteUpdating.current = false;
+                break;
+              case MuteDevice.Camera:
+                videoMuteUpdating.current = true;
+                trackPublication = await participant.setCameraEnabled(
+                  buttonEnabled.current.video,
+                  room.options.videoCaptureDefaults,
+                );
+                videoMuteUpdating.current = false;
+                break;
+            }
+
+            if (trackPublication) {
+              // await participant.setMicrophoneEnabled can return immediately in some instances,
+              // so that participant.isMicrophoneEnabled !== buttonEnabled.current.audio still holds true.
+              // This happens if the device is still in a pending state
+              // "sleeping" here makes sure we let react do its thing so that participant.isMicrophoneEnabled is updated,
+              // so we do not end up in a recursion loop.
+              await new Promise((r) => setTimeout(r, 100));
+
+              // track got successfully changed to mute/unmute
+              // Run the check again after the change is done. Because the user
+              // can update the state (presses mute button) while the device is enabling
+              // itself we need might need to update the mute state right away.
+              // This async recursion makes sure that setCamera/MicrophoneEnabled is
+              // called as little times as possible.
+              await syncMuteState(iterCount + 1, type);
+            } else {
+              throw new Error(
+                "track with new mute state could not be published",
+              );
+            }
+          } catch (e) {
+            if ((e as DOMException).name === "NotAllowedError") {
+              logger.error(
+                "Fatal error while syncing mute state: resetting",
+                e,
+              );
+              if (type === MuteDevice.Microphone) {
+                audioMuteUpdating.current = false;
+                muteStates.audio.setEnabled?.(false);
+              } else {
+                videoMuteUpdating.current = false;
+                muteStates.video.setEnabled?.(false);
+              }
+            } else {
+              logger.error(
+                "Failed to sync audio mute state with LiveKit (will retry to sync in 1s):",
+                e,
+              );
+              setTimeout(() => {
+                syncMuteState(iterCount + 1, type).catch((e) => {
+                  logger.error(
+                    `Failed to sync ${MuteDevice[type]} mute state with LiveKit iterCount=${iterCount + 1}`,
+                    e,
+                  );
+                });
+              }, 1000);
+            }
+          }
+        }
+      };
+
+      syncMuteState(0, MuteDevice.Microphone).catch((e) => {
+        logger.error("Failed to sync audio mute state with LiveKit", e);
+      });
+      syncMuteState(0, MuteDevice.Camera).catch((e) => {
+        logger.error("Failed to sync video mute state with LiveKit", e);
+      });
+    }
+  }, [room, muteStates, connectionState]);
+
+  useEffect(() => {
+    // Sync the requested devices with LiveKit's devices
+    if (room !== undefined && connectionState === ConnectionState.Connected) {
+      const syncDevice = (
+        kind: MediaDeviceKind,
+        selected$: Observable<SelectedDevice | undefined>,
+      ): Subscription =>
+        selected$.subscribe((device) => {
+          logger.info(
+            "[LivekitRoom] syncDevice room.getActiveDevice(kind) !== d.id :",
+            room.getActiveDevice(kind),
+            " !== ",
+            device?.id,
+          );
+          if (
+            device !== undefined &&
+            room.getActiveDevice(kind) !== device.id
+          ) {
+            room
+              .switchActiveDevice(kind, device.id)
+              .catch((e) =>
+                logger.error(`Failed to sync ${kind} device with LiveKit`, e),
+              );
+          }
+        });
+
+      const subscriptions = [
+        syncDevice("audioinput", devices.audioInput.selected$),
+        !controlledAudioDevices
+          ? syncDevice("audiooutput", devices.audioOutput.selected$)
+          : undefined,
+        syncDevice("videoinput", devices.videoInput.selected$),
+        // Restart the audio input track whenever we detect that the active media
+        // device has changed to refer to a different hardware device. We do this
+        // for the sake of Chrome, which provides a "default" device that is meant
+        // to match the system's default audio input, whatever that may be.
+        // This is special-cased for only audio inputs because we need to dig around
+        // in the LocalParticipant object for the track object and there's not a nice
+        // way to do that generically. There is usually no OS-level default video capture
+        // device anyway, and audio outputs work differently.
+        devices.audioInput.selected$
+          .pipe(switchMap((device) => device?.hardwareDeviceChange$ ?? NEVER))
+          .subscribe(() => {
+            const activeMicTrack = Array.from(
+              room.localParticipant.audioTrackPublications.values(),
+            ).find((d) => d.source === Track.Source.Microphone)?.track;
+
+            if (
+              activeMicTrack &&
+              // only restart if the stream is still running: LiveKit will detect
+              // when a track stops & restart appropriately, so this is not our job.
+              // Plus, we need to avoid restarting again if the track is already in
+              // the process of being restarted.
+              activeMicTrack.mediaStreamTrack.readyState !== "ended"
+            ) {
+              // Restart the track, which will cause Livekit to do another
+              // getUserMedia() call with deviceId: default to get the *new* default device.
+              // Note that room.switchActiveDevice() won't work: Livekit will ignore it because
+              // the deviceId hasn't changed (was & still is default).
+              room.localParticipant
+                .getTrackPublication(Track.Source.Microphone)
+                ?.audioTrack?.restartTrack()
+                .catch((e) => {
+                  logger.error(`Failed to restart audio device track`, e);
+                });
+            }
+          }),
+      ];
+
+      return (): void => {
+        for (const s of subscriptions) s?.unsubscribe();
+      };
+    }
+  }, [room, devices, connectionState, controlledAudioDevices]);
+
+  return {
+    connState: connectionState,
+    livekitRoom: room,
+  };
+}

src/main.tsx

@@ -24,7 +24,6 @@ import { App } from "./App";
 import { init as initRageshake } from "./settings/rageshake";
 import { Initializer } from "./initializer";
 import { AppViewModel } from "./state/AppViewModel";
-import { globalScope } from "./state/ObservableScope";
 
 window.setLKLogLevel = setLKLogLevel;
 
@@ -62,7 +61,7 @@ Initializer.initBeforeReact()
   .then(() => {
     root.render(
       <StrictMode>
-        <App vm={new AppViewModel(globalScope)} />
+        <App vm={new AppViewModel()} />
       </StrictMode>,
     );
   })

src/reactions/RaisedHandIndicator.test.tsx

@@ -5,7 +5,7 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE in the repository root for full details.
 */
 
-import { beforeEach, describe, expect, test, vi } from "vitest";
+import { describe, expect, test } from "vitest";
 import { render, configure } from "@testing-library/react";
 
 import { RaisedHandIndicator } from "./RaisedHandIndicator";
@@ -15,13 +15,6 @@ configure({
 });
 
 describe("RaisedHandIndicator", () => {
-  const fixedTime = new Date("2025-01-01T12:00:00.000Z");
-
-  beforeEach(() => {
-    vi.useFakeTimers();
-    vi.setSystemTime(fixedTime);
-  });
-
   test("renders nothing when no hand has been raised", () => {
     const { container } = render(<RaisedHandIndicator />);
     expect(container.firstChild).toBeNull();

src/reactions/ReactionsReader.test.tsx

@@ -7,6 +7,7 @@ Please see LICENSE in the repository root for full details.
 
 import { renderHook } from "@testing-library/react";
 import { afterEach, test, vitest } from "vitest";
+import { type MatrixRTCSession } from "matrix-js-sdk/lib/matrixrtc";
 import {
   RoomEvent as MatrixRoomEvent,
   MatrixEvent,
@@ -23,7 +24,7 @@ import {
   localRtcMember,
 } from "../utils/test-fixtures";
 import { getBasicRTCSession } from "../utils/test-viewmodel";
-import { testScope, withTestScheduler } from "../utils/test";
+import { withTestScheduler } from "../utils/test";
 import { ElementCallReactionEventType, ReactionSet } from ".";
 
 afterEach(() => {
@@ -37,8 +38,7 @@ test("handles a hand raised reaction", () => {
   withTestScheduler(({ schedule, expectObservable }) => {
     renderHook(() => {
       const { raisedHands$ } = new ReactionsReader(
-        testScope(),
-        rtcSession.asMockedSession(),
+        rtcSession as unknown as MatrixRTCSession,
       );
       schedule("ab", {
         a: () => {},
@@ -48,7 +48,7 @@ test("handles a hand raised reaction", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: EventType.Reaction,
               origin_server_ts: localTimestamp.getTime(),
               content: {
@@ -68,7 +68,7 @@ test("handles a hand raised reaction", () => {
       expectObservable(raisedHands$).toBe("ab", {
         a: {},
         b: {
-          [`${localRtcMember.userId}:${localRtcMember.deviceId}`]: {
+          [`${localRtcMember.sender}:${localRtcMember.deviceId}`]: {
             reactionEventId,
             membershipEventId: localRtcMember.eventId,
             time: localTimestamp,
@@ -86,8 +86,7 @@ test("handles a redaction", () => {
   withTestScheduler(({ schedule, expectObservable }) => {
     renderHook(() => {
       const { raisedHands$ } = new ReactionsReader(
-        testScope(),
-        rtcSession.asMockedSession(),
+        rtcSession as unknown as MatrixRTCSession,
       );
       schedule("abc", {
         a: () => {},
@@ -97,7 +96,7 @@ test("handles a redaction", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: EventType.Reaction,
               origin_server_ts: localTimestamp.getTime(),
               content: {
@@ -119,7 +118,7 @@ test("handles a redaction", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: EventType.RoomRedaction,
               redacts: reactionEventId,
             }),
@@ -131,7 +130,7 @@ test("handles a redaction", () => {
       expectObservable(raisedHands$).toBe("abc", {
         a: {},
         b: {
-          [`${localRtcMember.userId}:${localRtcMember.deviceId}`]: {
+          [`${localRtcMember.sender}:${localRtcMember.deviceId}`]: {
             reactionEventId,
             membershipEventId: localRtcMember.eventId,
             time: localTimestamp,
@@ -150,8 +149,7 @@ test("handles waiting for event decryption", () => {
   withTestScheduler(({ schedule, expectObservable }) => {
     renderHook(() => {
       const { raisedHands$ } = new ReactionsReader(
-        testScope(),
-        rtcSession.asMockedSession(),
+        rtcSession as unknown as MatrixRTCSession,
       );
       schedule("abc", {
         a: () => {},
@@ -159,7 +157,7 @@ test("handles waiting for event decryption", () => {
           const encryptedEvent = new MatrixEvent({
             room_id: rtcSession.room.roomId,
             event_id: reactionEventId,
-            sender: localRtcMember.userId,
+            sender: localRtcMember.sender,
             type: EventType.Reaction,
             origin_server_ts: localTimestamp.getTime(),
             content: {
@@ -186,7 +184,7 @@ test("handles waiting for event decryption", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: EventType.Reaction,
               origin_server_ts: localTimestamp.getTime(),
               content: {
@@ -202,7 +200,7 @@ test("handles waiting for event decryption", () => {
       expectObservable(raisedHands$).toBe("a-c", {
         a: {},
         c: {
-          [`${localRtcMember.userId}:${localRtcMember.deviceId}`]: {
+          [`${localRtcMember.sender}:${localRtcMember.deviceId}`]: {
             reactionEventId,
             membershipEventId: localRtcMember.eventId,
             time: localTimestamp,
@@ -220,8 +218,7 @@ test("hands rejecting events without a proper membership", () => {
   withTestScheduler(({ schedule, expectObservable }) => {
     renderHook(() => {
       const { raisedHands$ } = new ReactionsReader(
-        testScope(),
-        rtcSession.asMockedSession(),
+        rtcSession as unknown as MatrixRTCSession,
       );
       schedule("ab", {
         a: () => {},
@@ -231,7 +228,7 @@ test("hands rejecting events without a proper membership", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: EventType.Reaction,
               origin_server_ts: localTimestamp.getTime(),
               content: {
@@ -266,8 +263,7 @@ test("handles a reaction", () => {
   withTestScheduler(({ schedule, time, expectObservable }) => {
     renderHook(() => {
       const { reactions$ } = new ReactionsReader(
-        testScope(),
-        rtcSession.asMockedSession(),
+        rtcSession as unknown as MatrixRTCSession,
       );
       schedule(`abc`, {
         a: () => {},
@@ -277,7 +273,7 @@ test("handles a reaction", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: ElementCallReactionEventType,
               content: {
                 emoji: reaction.emoji,
@@ -302,7 +298,7 @@ test("handles a reaction", () => {
         {
           a: {},
           b: {
-            [`${localRtcMember.userId}:${localRtcMember.deviceId}`]: {
+            [`${localRtcMember.sender}:${localRtcMember.deviceId}`]: {
               reactionOption: reaction,
               expireAfter: new Date(REACTION_ACTIVE_TIME_MS),
             },
@@ -325,8 +321,7 @@ test("ignores bad reaction events", () => {
   withTestScheduler(({ schedule, expectObservable }) => {
     renderHook(() => {
       const { reactions$ } = new ReactionsReader(
-        testScope(),
-        rtcSession.asMockedSession(),
+        rtcSession as unknown as MatrixRTCSession,
       );
       schedule("ab", {
         a: () => {},
@@ -337,7 +332,7 @@ test("ignores bad reaction events", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: ElementCallReactionEventType,
               content: {},
             }),
@@ -352,7 +347,7 @@ test("ignores bad reaction events", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: ElementCallReactionEventType,
               content: {
                 emoji: reaction.emoji,
@@ -373,7 +368,7 @@ test("ignores bad reaction events", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: aliceRtcMember.userId,
+              sender: aliceRtcMember.sender,
               type: ElementCallReactionEventType,
               content: {
                 emoji: reaction.emoji,
@@ -394,7 +389,7 @@ test("ignores bad reaction events", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: ElementCallReactionEventType,
               content: {
                 name: reaction.name,
@@ -414,7 +409,7 @@ test("ignores bad reaction events", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: ElementCallReactionEventType,
               content: {
                 emoji: " ",
@@ -450,8 +445,7 @@ test("that reactions cannot be spammed", () => {
   withTestScheduler(({ schedule, expectObservable }) => {
     renderHook(() => {
       const { reactions$ } = new ReactionsReader(
-        testScope(),
-        rtcSession.asMockedSession(),
+        rtcSession as unknown as MatrixRTCSession,
       );
       schedule("abcd", {
         a: () => {},
@@ -461,7 +455,7 @@ test("that reactions cannot be spammed", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: ElementCallReactionEventType,
               content: {
                 emoji: reactionA.emoji,
@@ -483,7 +477,7 @@ test("that reactions cannot be spammed", () => {
             new MatrixEvent({
               room_id: rtcSession.room.roomId,
               event_id: reactionEventId,
-              sender: localRtcMember.userId,
+              sender: localRtcMember.sender,
               type: ElementCallReactionEventType,
               content: {
                 emoji: reactionB.emoji,
@@ -508,7 +502,7 @@ test("that reactions cannot be spammed", () => {
         {
           a: {},
           b: {
-            [`${localRtcMember.userId}:${localRtcMember.deviceId}`]: {
+            [`${localRtcMember.sender}:${localRtcMember.deviceId}`]: {
               reactionOption: reactionA,
               expireAfter: new Date(REACTION_ACTIVE_TIME_MS),
             },

src/reactions/ReactionsReader.ts

@@ -18,7 +18,7 @@ import {
   EventType,
   RoomEvent as MatrixRoomEvent,
 } from "matrix-js-sdk";
-import { BehaviorSubject, delay } from "rxjs";
+import { BehaviorSubject, delay, type Subscription } from "rxjs";
 
 import {
   ElementCallReactionEventType,
@@ -28,7 +28,6 @@ import {
   type RaisedHandInfo,
   type ReactionInfo,
 } from ".";
-import { type ObservableScope } from "../state/ObservableScope";
 
 export const REACTION_ACTIVE_TIME_MS = 3000;
 
@@ -55,13 +54,12 @@ export class ReactionsReader {
    */
   public readonly reactions$ = this.reactionsSubject$.asObservable();
 
-  public constructor(
-    private readonly scope: ObservableScope,
-    private readonly rtcSession: MatrixRTCSession,
-  ) {
+  private readonly reactionsSub: Subscription;
+
+  public constructor(private readonly rtcSession: MatrixRTCSession) {
     // Hide reactions after a given time.
-    this.reactionsSubject$
-      .pipe(delay(REACTION_ACTIVE_TIME_MS), this.scope.bind())
+    this.reactionsSub = this.reactionsSubject$
+      .pipe(delay(REACTION_ACTIVE_TIME_MS))
       .subscribe((reactions) => {
         const date = new Date();
         const nextEntries = Object.fromEntries(
@@ -73,38 +71,15 @@ export class ReactionsReader {
         this.reactionsSubject$.next(nextEntries);
       });
 
-    // TODO: Convert this class to the functional reactive style and get rid of
-    // all this manual setup and teardown for event listeners
-
     this.rtcSession.room.on(MatrixRoomEvent.Timeline, this.handleReactionEvent);
-    this.scope.onEnd(() =>
-      this.rtcSession.room.off(
-        MatrixRoomEvent.Timeline,
-        this.handleReactionEvent,
-      ),
-    );
-
     this.rtcSession.room.on(
       MatrixRoomEvent.Redaction,
       this.handleReactionEvent,
     );
-    this.scope.onEnd(() =>
-      this.rtcSession.room.off(
-        MatrixRoomEvent.Redaction,
-        this.handleReactionEvent,
-      ),
-    );
-
     this.rtcSession.room.client.on(
       MatrixEventEvent.Decrypted,
       this.handleReactionEvent,
     );
-    this.scope.onEnd(() =>
-      this.rtcSession.room.client.off(
-        MatrixEventEvent.Decrypted,
-        this.handleReactionEvent,
-      ),
-    );
 
     // We listen for a local echo to get the real event ID, as timeline events
     // may still be sending.
@@ -112,33 +87,21 @@ export class ReactionsReader {
       MatrixRoomEvent.LocalEchoUpdated,
       this.handleReactionEvent,
     );
-    this.scope.onEnd(() =>
-      this.rtcSession.room.off(
-        MatrixRoomEvent.LocalEchoUpdated,
-        this.handleReactionEvent,
-      ),
-    );
 
-    this.rtcSession.on(
+    rtcSession.on(
       MatrixRTCSessionEvent.MembershipsChanged,
       this.onMembershipsChanged,
     );
-    this.scope.onEnd(() =>
-      this.rtcSession.off(
-        MatrixRTCSessionEvent.MembershipsChanged,
-        this.onMembershipsChanged,
-      ),
-    );
 
     // Run this once to ensure we have fetched the state from the call.
     this.onMembershipsChanged([]);
   }
 
   /**
-   * Fetches any hand wave reactions by the given sender on the given
+   * Fetchest any hand wave reactions by the given sender on the given
    * membership event.
-   * @param membershipEventId - The user membership event id.
-   * @param expectedSender - The expected sender of the reaction.
+   * @param membershipEventId
+   * @param expectedSender
    * @returns A MatrixEvent if one was found.
    */
   private getLastReactionEvent(
@@ -167,7 +130,7 @@ export class ReactionsReader {
   private onMembershipsChanged = (oldMemberships: CallMembership[]): void => {
     // Remove any raised hands for users no longer joined to the call.
     for (const identifier of Object.keys(this.raisedHandsSubject$.value).filter(
-      (rhId) => oldMemberships.find((u) => u.userId == rhId),
+      (rhId) => oldMemberships.find((u) => u.sender == rhId),
     )) {
       this.removeRaisedHand(identifier);
     }
@@ -175,10 +138,10 @@ export class ReactionsReader {
     // For each member in the call, check to see if a reaction has
     // been raised and adjust.
     for (const m of this.rtcSession.memberships) {
-      if (!m.userId || !m.eventId) {
+      if (!m.sender || !m.eventId) {
         continue;
       }
-      const identifier = `${m.userId}:${m.deviceId}`;
+      const identifier = `${m.sender}:${m.deviceId}`;
       if (
         this.raisedHandsSubject$.value[identifier] &&
         this.raisedHandsSubject$.value[identifier].membershipEventId !==
@@ -188,13 +151,13 @@ export class ReactionsReader {
         // was raised, reset.
         this.removeRaisedHand(identifier);
       }
-      const reaction = this.getLastReactionEvent(m.eventId, m.userId);
+      const reaction = this.getLastReactionEvent(m.eventId, m.sender);
       if (reaction) {
         const eventId = reaction?.getId();
         if (!eventId) {
           continue;
         }
-        this.addRaisedHand(`${m.userId}:${m.deviceId}`, {
+        this.addRaisedHand(`${m.sender}:${m.deviceId}`, {
           membershipEventId: m.eventId,
           reactionEventId: eventId,
           time: new Date(reaction.localTimestamp),
@@ -256,7 +219,7 @@ export class ReactionsReader {
 
       const membershipEventId = content?.["m.relates_to"]?.event_id;
       const membershipEvent = this.rtcSession.memberships.find(
-        (e) => e.eventId === membershipEventId && e.userId === sender,
+        (e) => e.eventId === membershipEventId && e.sender === sender,
       );
       // Check to see if this reaction was made to a membership event (and the
       // sender of the reaction matches the membership)
@@ -266,8 +229,7 @@ export class ReactionsReader {
         );
         return;
       }
-      // TODO refactor to use memer id `membershipEvent.membershipID` (needs to happen in combination with other memberId refactors)
-      const identifier = `${membershipEvent.userId}:${membershipEvent.deviceId}`;
+      const identifier = `${membershipEvent.sender}:${membershipEvent.deviceId}`;
 
       if (!content.emoji) {
         logger.warn(`Reaction had no emoji from ${reactionEventId}`);
@@ -316,7 +278,7 @@ export class ReactionsReader {
       // Check to see if this reaction was made to a membership event (and the
       // sender of the reaction matches the membership)
       const membershipEvent = this.rtcSession.memberships.find(
-        (e) => e.eventId === membershipEventId && e.userId === sender,
+        (e) => e.eventId === membershipEventId && e.sender === sender,
       );
       if (!membershipEvent) {
         logger.warn(
@@ -327,7 +289,7 @@ export class ReactionsReader {
 
       if (content?.["m.relates_to"].key === "🖐️") {
         this.addRaisedHand(
-          `${membershipEvent.userId}:${membershipEvent.deviceId}`,
+          `${membershipEvent.sender}:${membershipEvent.deviceId}`,
           {
             reactionEventId,
             membershipEventId,
@@ -347,4 +309,31 @@ export class ReactionsReader {
       this.removeRaisedHand(targetUser);
     }
   };
+
+  /**
+   * Stop listening for events.
+   */
+  public destroy(): void {
+    this.rtcSession.off(
+      MatrixRTCSessionEvent.MembershipsChanged,
+      this.onMembershipsChanged,
+    );
+    this.rtcSession.room.off(
+      MatrixRoomEvent.Timeline,
+      this.handleReactionEvent,
+    );
+    this.rtcSession.room.off(
+      MatrixRoomEvent.Redaction,
+      this.handleReactionEvent,
+    );
+    this.rtcSession.room.client.off(
+      MatrixEventEvent.Decrypted,
+      this.handleReactionEvent,
+    );
+    this.rtcSession.room.off(
+      MatrixRoomEvent.LocalEchoUpdated,
+      this.handleReactionEvent,
+    );
+    this.reactionsSub.unsubscribe();
+  }
 }

src/reactions/__snapshots__/RaisedHandIndicator.test.tsx.snap

@@ -15,7 +15,7 @@ exports[`RaisedHandIndicator > renders a smaller indicator when miniature is spe
     </span>
   </div>
   <p>
-    00:00
+    00:01
   </p>
 </div>
 `;
@@ -35,7 +35,7 @@ exports[`RaisedHandIndicator > renders an indicator when a hand has been raised
     </span>
   </div>
   <p>
-    00:00
+    00:01
   </p>
 </div>
 `;
@@ -55,7 +55,7 @@ exports[`RaisedHandIndicator > renders an indicator when a hand has been raised
     </span>
   </div>
   <p>
-    01:00
+    01:01
   </p>
 </div>
 `;

src/reactions/useReactionsSender.tsx

@@ -20,7 +20,7 @@ import { logger } from "matrix-js-sdk/lib/logger";
 import { useMatrixRTCSessionMemberships } from "../useMatrixRTCSessionMemberships";
 import { useClientState } from "../ClientContext";
 import { ElementCallReactionEventType, type ReactionOption } from ".";
-import { type CallViewModel } from "../state/CallViewModel/CallViewModel";
+import { type CallViewModel } from "../state/CallViewModel";
 import { useBehavior } from "../useBehavior";
 
 interface ReactionsSenderContextType {
@@ -65,7 +65,7 @@ export const ReactionsSenderProvider = ({
   const myMembershipEvent = useMemo(
     () =>
       memberships.find(
-        (m) => m.userId === myUserId && m.deviceId === myDeviceId,
+        (m) => m.sender === myUserId && m.deviceId === myDeviceId,
       )?.eventId,
     [memberships, myUserId, myDeviceId],
   );

src/room/CallEventAudioRenderer.test.tsx

@@ -7,6 +7,7 @@ Please see LICENSE in the repository root for full details.
 
 import { render } from "@testing-library/react";
 import {
+  afterAll,
   beforeEach,
   expect,
   type MockedFunction,
@@ -15,17 +16,9 @@ import {
   afterEach,
 } from "vitest";
 import { act } from "react";
-import { type RoomMember } from "matrix-js-sdk";
-import {
-  type LivekitTransport,
-  type CallMembership,
-} from "matrix-js-sdk/lib/matrixrtc";
+import { type CallMembership } from "matrix-js-sdk/lib/matrixrtc";
 
-import {
-  exampleTransport,
-  mockMatrixRoomMember,
-  mockRtcMembership,
-} from "../utils/test";
+import { mockRtcMembership } from "../utils/test";
 import { CallEventAudioRenderer } from "./CallEventAudioRenderer";
 import { useAudioContext } from "../useAudioContext";
 import { prefetchSounds } from "../soundUtils";
@@ -33,23 +26,21 @@ import { getBasicCallViewModelEnvironment } from "../utils/test-viewmodel";
 import {
   alice,
   aliceRtcMember,
-  bob,
   bobRtcMember,
   local,
   localRtcMember,
 } from "../utils/test-fixtures";
-import { MAX_PARTICIPANT_COUNT_FOR_SOUND } from "../state/CallViewModel/CallViewModel";
+import { MAX_PARTICIPANT_COUNT_FOR_SOUND } from "../state/CallViewModel";
 
-vitest.mock("livekit-client/e2ee-worker?worker");
 vitest.mock("../useAudioContext");
 vitest.mock("../soundUtils");
-vitest.mock("../rtcSessionHelpers", async (importOriginal) => ({
-  ...(await importOriginal()),
-  makeTransport: (): [LivekitTransport] => [exampleTransport],
-}));
 
 afterEach(() => {
-  vitest.clearAllMocks();
+  vitest.resetAllMocks();
+});
+
+afterAll(() => {
+  vitest.restoreAllMocks();
 });
 
 let playSound: MockedFunction<
@@ -79,7 +70,6 @@ test("plays one sound when entering a call", () => {
   const { vm, rtcMemberships$ } = getBasicCallViewModelEnvironment([
     local,
     alice,
-    bob,
   ]);
   render(<CallEventAudioRenderer vm={vm} />);
 
@@ -94,7 +84,6 @@ test("plays a sound when a user joins", () => {
   const { vm, rtcMemberships$ } = getBasicCallViewModelEnvironment([
     local,
     alice,
-    bob,
   ]);
   render(<CallEventAudioRenderer vm={vm} />);
 
@@ -133,16 +122,15 @@ test("does not play a sound before the call is successful", () => {
 });
 
 test("plays no sound when the participant list is more than the maximum size", () => {
-  const mockMembers: RoomMember[] = [local];
   const mockRtcMemberships: CallMembership[] = [localRtcMember];
   for (let i = 0; i < MAX_PARTICIPANT_COUNT_FOR_SOUND; i++) {
-    const membership = mockRtcMembership(`@user${i}:example.org`, `DEVICE${i}`);
-    mockMembers.push(mockMatrixRoomMember(membership));
-    mockRtcMemberships.push(membership);
+    mockRtcMemberships.push(
+      mockRtcMembership(`@user${i}:example.org`, `DEVICE${i}`),
+    );
   }
 
   const { vm, rtcMemberships$ } = getBasicCallViewModelEnvironment(
-    mockMembers,
+    [local, alice],
     mockRtcMemberships,
   );
 
@@ -162,14 +150,12 @@ test("plays one sound when a hand is raised", () => {
   const { vm, handRaisedSubject$ } = getBasicCallViewModelEnvironment([
     local,
     alice,
-    bob,
   ]);
   render(<CallEventAudioRenderer vm={vm} />);
 
   act(() => {
     handRaisedSubject$.next({
-      // TODO: What is this string supposed to be?
-      [`${bobRtcMember.userId}:${bobRtcMember.deviceId}`]: {
+      [bobRtcMember.callId]: {
         time: new Date(),
         membershipEventId: "",
         reactionEventId: "",

src/room/CallEventAudioRenderer.tsx

@@ -7,7 +7,7 @@ Please see LICENSE in the repository root for full details.
 
 import { type ReactNode, useEffect } from "react";
 
-import { type CallViewModel } from "../state/CallViewModel/CallViewModel";
+import { type CallViewModel } from "../state/CallViewModel";
 import joinCallSoundMp3 from "../sound/join_call.mp3";
 import joinCallSoundOgg from "../sound/join_call.ogg";
 import leftCallSoundMp3 from "../sound/left_call.mp3";

src/room/EarpieceOverlay.module.css

@@ -7,17 +7,34 @@
   align-items: center;
   justify-content: center;
   gap: var(--cpd-space-2x);
-  transition: opacity 200ms;
+}
+
+@keyframes fade-in {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 1;
+  }
 }
 
 .overlay[data-show="true"] {
-  opacity: 1;
+  animation: fade-in 200ms;
+}
+
+@keyframes fade-out {
+  from {
+    opacity: 1;
+  }
+  to {
+    opacity: 0;
+    display: none;
+  }
 }
 
 .overlay[data-show="false"] {
-  opacity: 0;
+  animation: fade-out 130ms forwards;
   pointer-events: none;
-  transition-duration: 130ms;
 }
 
 .overlay::before {

src/room/GroupCallErrorBoundary.test.tsx

@@ -26,7 +26,7 @@ import {
   E2EENotSupportedError,
   type ElementCallError,
   InsufficientCapacityError,
-  MatrixRTCTransportMissingError,
+  MatrixRTCFocusMissingError,
   UnknownCallError,
 } from "../utils/errors.ts";
 import { mockConfig } from "../utils/test.ts";
@@ -34,7 +34,7 @@ import { ElementWidgetActions, type WidgetHelpers } from "../widget.ts";
 
 test.each([
   {
-    error: new MatrixRTCTransportMissingError("example.com"),
+    error: new MatrixRTCFocusMissingError("example.com"),
     expectedTitle: "Call is not supported",
   },
   {
@@ -85,7 +85,7 @@ test.each([
 );
 
 test("should render the error page with link back to home", async () => {
-  const error = new MatrixRTCTransportMissingError("example.com");
+  const error = new MatrixRTCFocusMissingError("example.com");
   const TestComponent = (): ReactNode => {
     throw error;
   };
@@ -106,7 +106,7 @@ test("should render the error page with link back to home", async () => {
   await screen.findByText("Call is not supported");
   expect(screen.getByText(/Domain: example\.com/i)).toBeInTheDocument();
   expect(
-    screen.getByText(/Error Code: MISSING_MATRIX_RTC_TRANSPORT/i),
+    screen.getByText(/Error Code: MISSING_MATRIX_RTC_FOCUS/i),
   ).toBeInTheDocument();
 
   await screen.findByRole("button", { name: "Return to home screen" });
@@ -213,7 +213,7 @@ describe("Rageshake button", () => {
 });
 
 test("should have a close button in widget mode", async () => {
-  const error = new MatrixRTCTransportMissingError("example.com");
+  const error = new MatrixRTCFocusMissingError("example.com");
   const TestComponent = (): ReactNode => {
     throw error;
   };

src/room/GroupCallErrorBoundary.tsx

@@ -22,7 +22,6 @@ import {
   WebBrowserIcon,
 } from "@vector-im/compound-design-tokens/assets/web/icons";
 import { Button } from "@vector-im/compound-web";
-import { logger } from "matrix-js-sdk/lib/logger";
 
 import {
   ConnectionLostError,
@@ -54,7 +53,7 @@ const ErrorPage: FC<ErrorPageProps> = ({
   widget,
 }: ErrorPageProps): ReactElement => {
   const { t } = useTranslation();
-  logger.error("Error boundary caught:", error);
+
   let icon: ComponentType<SVGAttributes<SVGElement>>;
   switch (error.category) {
     case ErrorCategory.CONFIGURATION_ISSUE:

src/room/GroupCallView.test.tsx

@@ -5,10 +5,6 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE in the repository root for full details.
 */
 
-// TODO-MULTI-SFU: Restore or discard these tests. The role of GroupCallView has
-// changed (it no longer manages the connection to the same extent), so they may
-// need extra work to adapt.
-
 import {
   beforeEach,
   expect,
@@ -29,8 +25,8 @@ import userEvent from "@testing-library/user-event";
 import { type RelationsContainer } from "matrix-js-sdk/lib/models/relations-container";
 import { useState } from "react";
 import { TooltipProvider } from "@vector-im/compound-web";
-import { type ITransport } from "matrix-widget-api";
 
+import { type MuteStates } from "./MuteStates";
 import { prefetchSounds } from "../soundUtils";
 import { useAudioContext } from "../useAudioContext";
 import { ActiveCall } from "./InCallView";
@@ -44,14 +40,13 @@ import {
   MockRTCSession,
 } from "../utils/test";
 import { GroupCallView } from "./GroupCallView";
-import { ElementWidgetActions, type WidgetHelpers } from "../widget";
+import { type WidgetHelpers } from "../widget";
 import { LazyEventEmitter } from "../LazyEventEmitter";
-import { MatrixRTCTransportMissingError } from "../utils/errors";
+import { MatrixRTCFocusMissingError } from "../utils/errors";
 import { ProcessorProvider } from "../livekit/TrackProcessorContext";
 import { MediaDevicesContext } from "../MediaDevicesContext";
 import { HeaderStyle } from "../UrlParams";
 import { constant } from "../state/Behavior";
-import { type MuteStates } from "../state/MuteStates.ts";
 
 vi.mock("../soundUtils");
 vi.mock("../useAudioContext");
@@ -78,13 +73,12 @@ const leaveRTCSession = vi.hoisted(() =>
   ),
 );
 
-// vi.mock("../rtcSessionHelpers", async (importOriginal) => {
-//   // TODO: perhaps there is a more elegant way to manage the type import here?
-//   // eslint-disable-next-line @typescript-eslint/consistent-type-imports
-//   const orig = await importOriginal<typeof import("../rtcSessionHelpers")>();
-//   // TODO: leaveRTCSession no longer exists! Tests need adapting.
-//   return { ...orig, enterRTCSession, leaveRTCSession };
-// });
+vi.mock("../rtcSessionHelpers", async (importOriginal) => {
+  // TODO: perhaps there is a more elegant way to manage the type import here?
+  // eslint-disable-next-line @typescript-eslint/consistent-type-imports
+  const orig = await importOriginal<typeof import("../rtcSessionHelpers")>();
+  return { ...orig, enterRTCSession, leaveRTCSession };
+});
 
 let playSound: MockedFunction<
   NonNullable<ReturnType<typeof useAudioContext>>["playSound"]
@@ -109,14 +103,10 @@ beforeEach(() => {
   });
   // A trivial implementation of Active call to ensure we are testing GroupCallView exclusively here.
   (ActiveCall as MockedFunction<typeof ActiveCall>).mockImplementation(
-    ({ onLeft: onLeave }) => {
+    ({ onLeave }) => {
       return (
         <div>
           <button onClick={() => onLeave("user")}>Leave</button>
-          <button onClick={() => onLeave("allOthersLeft")}>
-            SimulateOtherLeft
-          </button>
-          <button onClick={() => onLeave("error")}>SimulateErrorLeft</button>
         </div>
       );
     },
@@ -127,12 +117,12 @@ function createGroupCallView(
   widget: WidgetHelpers | null,
   joined = true,
 ): {
-  rtcSession: MatrixRTCSession;
+  rtcSession: MockRTCSession;
   getByText: ReturnType<typeof render>["getByText"];
 } {
   const client = {
     getUser: () => null,
-    getUserId: () => localRtcMember.userId,
+    getUserId: () => localRtcMember.sender,
     getDeviceId: () => localRtcMember.deviceId,
     getRoom: (rId) => (rId === roomId ? room : null),
   } as Partial<MatrixClient> as MatrixClient;
@@ -160,8 +150,7 @@ function createGroupCallView(
   const muteState = {
     audio: { enabled: false },
     video: { enabled: false },
-    // TODO-MULTI-SFU: This cast isn't valid, it's likely the cause of some current test failures
-  } as unknown as MuteStates;
+  } as MuteStates;
   const { getByText } = render(
     <BrowserRouter>
       <TooltipProvider>
@@ -174,12 +163,10 @@ function createGroupCallView(
               preload={false}
               skipLobby={false}
               header={HeaderStyle.Standard}
-              rtcSession={rtcSession.asMockedSession()}
+              rtcSession={rtcSession as unknown as MatrixRTCSession}
+              isJoined={joined}
               muteStates={muteState}
               widget={widget}
-              // TODO-MULTI-SFU: Make joined and setJoined work
-              joined={true}
-              setJoined={function (value: boolean): void {}}
             />
           </ProcessorProvider>
         </MediaDevicesContext>
@@ -188,11 +175,11 @@ function createGroupCallView(
   );
   return {
     getByText,
-    rtcSession: rtcSession.asMockedSession(),
+    rtcSession,
   };
 }
 
-test.skip("GroupCallView plays a leave sound asynchronously in SPA mode", async () => {
+test("GroupCallView plays a leave sound asynchronously in SPA mode", async () => {
   const user = userEvent.setup();
   const { getByText, rtcSession } = createGroupCallView(null);
   const leaveButton = getByText("Leave");
@@ -209,7 +196,7 @@ test.skip("GroupCallView plays a leave sound asynchronously in SPA mode", async
   await waitFor(() => expect(leaveRTCSession).toHaveResolved());
 });
 
-test.skip("GroupCallView plays a leave sound synchronously in widget mode", async () => {
+test("GroupCallView plays a leave sound synchronously in widget mode", async () => {
   const user = userEvent.setup();
   const widget = {
     api: {
@@ -248,113 +235,7 @@ test.skip("GroupCallView plays a leave sound synchronously in widget mode", asyn
   expect(leaveRTCSession).toHaveBeenCalledOnce();
 });
 
-test.skip("Should close widget when all other left and have time to play a sound", async () => {
-  const user = userEvent.setup();
-  const widgetClosedCalled = Promise.withResolvers<void>();
-  const widgetSendMock = vi.fn().mockImplementation((action: string) => {
-    if (action === ElementWidgetActions.Close) {
-      widgetClosedCalled.resolve();
-    }
-  });
-  const widgetStopMock = vi.fn().mockResolvedValue(undefined);
-  const widget = {
-    api: {
-      setAlwaysOnScreen: vi.fn().mockResolvedValue(true),
-      transport: {
-        send: widgetSendMock,
-        reply: vi.fn().mockResolvedValue(undefined),
-        stop: widgetStopMock,
-      } as unknown as ITransport,
-    } as Partial<WidgetHelpers["api"]>,
-    lazyActions: new LazyEventEmitter(),
-  };
-  const resolvePlaySound = Promise.withResolvers<void>();
-  playSound = vi.fn().mockReturnValue(resolvePlaySound);
-  (useAudioContext as MockedFunction<typeof useAudioContext>).mockReturnValue({
-    playSound,
-    playSoundLooping: vitest.fn(),
-    soundDuration: {},
-  });
-
-  const { getByText } = createGroupCallView(widget as WidgetHelpers);
-  const leaveButton = getByText("SimulateOtherLeft");
-  await user.click(leaveButton);
-  await flushPromises();
-  expect(widgetSendMock).not.toHaveBeenCalled();
-  resolvePlaySound.resolve();
-  await flushPromises();
-
-  expect(playSound).toHaveBeenCalledWith("left");
-
-  await widgetClosedCalled.promise;
-  await flushPromises();
-  expect(widgetStopMock).toHaveBeenCalledOnce();
-});
-
-test("Should close widget when all other left", async () => {
-  const user = userEvent.setup();
-  const widgetClosedCalled = Promise.withResolvers<void>();
-  const widgetSendMock = vi.fn().mockImplementation((action: string) => {
-    if (action === ElementWidgetActions.Close) {
-      widgetClosedCalled.resolve();
-    }
-  });
-  const widgetStopMock = vi.fn().mockResolvedValue(undefined);
-  const widget = {
-    api: {
-      setAlwaysOnScreen: vi.fn().mockResolvedValue(true),
-      transport: {
-        send: widgetSendMock,
-        reply: vi.fn().mockResolvedValue(undefined),
-        stop: widgetStopMock,
-      } as unknown as ITransport,
-    } as Partial<WidgetHelpers["api"]>,
-    lazyActions: new LazyEventEmitter(),
-  };
-
-  const { getByText } = createGroupCallView(widget as WidgetHelpers);
-  const leaveButton = getByText("SimulateOtherLeft");
-  await user.click(leaveButton);
-  await flushPromises();
-
-  await widgetClosedCalled.promise;
-  await flushPromises();
-  expect(widgetStopMock).toHaveBeenCalledOnce();
-});
-
-test("Should not close widget when auto leave due to error", async () => {
-  const user = userEvent.setup();
-
-  const widgetStopMock = vi.fn().mockResolvedValue(undefined);
-  const widgetSendMock = vi.fn().mockResolvedValue(undefined);
-  const widget = {
-    api: {
-      setAlwaysOnScreen: vi.fn().mockResolvedValue(true),
-      transport: {
-        send: widgetSendMock,
-        reply: vi.fn().mockResolvedValue(undefined),
-        stop: widgetStopMock,
-      } as unknown as ITransport,
-    } as Partial<WidgetHelpers["api"]>,
-    lazyActions: new LazyEventEmitter(),
-  };
-
-  const alwaysOnScreenSpy = vi.spyOn(widget.api, "setAlwaysOnScreen");
-
-  const { getByText } = createGroupCallView(widget as WidgetHelpers);
-  const leaveButton = getByText("SimulateErrorLeft");
-  await user.click(leaveButton);
-  await flushPromises();
-
-  // When onLeft is called, we first set always on screen to false
-  await waitFor(() => expect(alwaysOnScreenSpy).toHaveBeenCalledWith(false));
-  await flushPromises();
-  // But then we do not close the widget automatically
-  expect(widgetStopMock).not.toHaveBeenCalledOnce();
-  expect(widgetSendMock).not.toHaveBeenCalledOnce();
-});
-
-test.skip("GroupCallView leaves the session when an error occurs", async () => {
+test("GroupCallView leaves the session when an error occurs", async () => {
   (ActiveCall as MockedFunction<typeof ActiveCall>).mockImplementation(() => {
     const [error, setError] = useState<Error | null>(null);
     if (error !== null) throw error;
@@ -375,10 +256,9 @@ test.skip("GroupCallView leaves the session when an error occurs", async () => {
   );
 });
 
-test.skip("GroupCallView shows errors that occur during joining", async () => {
+test("GroupCallView shows errors that occur during joining", async () => {
   const user = userEvent.setup();
-  // This should not mock this error that deep. it should only mock the CallViewModel.
-  enterRTCSession.mockRejectedValue(new MatrixRTCTransportMissingError(""));
+  enterRTCSession.mockRejectedValue(new MatrixRTCFocusMissingError(""));
   onTestFinished(() => {
     enterRTCSession.mockReset();
   });

src/room/GroupCallView.tsx

@@ -38,9 +38,10 @@ import { PosthogAnalytics } from "../analytics/PosthogAnalytics";
 import { useProfile } from "../profile/useProfile";
 import { findDeviceByName } from "../utils/media";
 import { ActiveCall } from "./InCallView";
-import { type MuteStates } from "../state/MuteStates";
+import { MUTE_PARTICIPANT_COUNT, type MuteStates } from "./MuteStates";
 import { useMediaDevices } from "../MediaDevicesContext";
 import { useMatrixRTCSessionMemberships } from "../useMatrixRTCSessionMemberships";
+import { enterRTCSession, leaveRTCSession } from "../rtcSessionHelpers";
 import {
   saveKeyForRoom,
   useRoomEncryptionSystem,
@@ -49,12 +50,7 @@ import { useRoomAvatar } from "./useRoomAvatar";
 import { useRoomName } from "./useRoomName";
 import { useJoinRule } from "./useJoinRule";
 import { InviteModal } from "./InviteModal";
-import {
-  getUrlParams,
-  HeaderStyle,
-  type UrlParams,
-  useUrlParams,
-} from "../UrlParams";
+import { HeaderStyle, type UrlParams, useUrlParams } from "../UrlParams";
 import { E2eeType } from "../e2ee/e2eeType";
 import { useAudioContext } from "../useAudioContext";
 import {
@@ -70,17 +66,16 @@ import {
   UnknownCallError,
 } from "../utils/errors.ts";
 import { GroupCallErrorBoundary } from "./GroupCallErrorBoundary.tsx";
+import {
+  useNewMembershipManager as useNewMembershipManagerSetting,
+  useExperimentalToDeviceTransport as useExperimentalToDeviceTransportSetting,
+  useSetting,
+} from "../settings/settings";
 import { useTypedEventEmitter } from "../useEvents";
 import { muteAllAudio$ } from "../state/MuteAllAudioModel.ts";
 import { useAppBarTitle } from "../AppBar.tsx";
 import { useBehavior } from "../useBehavior.ts";
 
-/**
- * If there already are this many participants in the call, we automatically mute
- * the user.
- */
-export const MUTE_PARTICIPANT_COUNT = 8;
-
 declare global {
   interface Window {
     rtcSession?: MatrixRTCSession;
@@ -95,8 +90,7 @@ interface Props {
   skipLobby: UrlParams["skipLobby"];
   header: HeaderStyle;
   rtcSession: MatrixRTCSession;
-  joined: boolean;
-  setJoined: (value: boolean) => void;
+  isJoined: boolean;
   muteStates: MuteStates;
   widget: WidgetHelpers | null;
 }
@@ -109,8 +103,7 @@ export const GroupCallView: FC<Props> = ({
   skipLobby,
   header,
   rtcSession,
-  joined,
-  setJoined,
+  isJoined,
   muteStates,
   widget,
 }) => {
@@ -131,10 +124,20 @@ export const GroupCallView: FC<Props> = ({
   // This should use `useEffectEvent` (only available in experimental versions)
   useEffect(() => {
     if (memberships.length >= MUTE_PARTICIPANT_COUNT)
-      muteStates.audio.setEnabled$.value?.(false);
+      muteStates.audio.setEnabled?.(false);
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, []);
 
+  // Update our member event when our mute state changes.
+  useEffect(() => {
+    if (!isJoined) {
+      return;
+    }
+    void rtcSession.updateCallIntent(
+      muteStates.video.enabled ? "video" : "audio",
+    );
+  }, [rtcSession, isJoined, muteStates.video.enabled]);
+
   useEffect(() => {
     logger.info("[Lifecycle] GroupCallView Component mounted");
     return (): void => {
@@ -159,8 +162,6 @@ export const GroupCallView: FC<Props> = ({
     };
   }, [rtcSession]);
 
-  // TODO move this into the callViewModel LocalMembership.ts
-  // We might actually not need this at all. Since we get into fatalError on those errors already?
   useTypedEventEmitter(
     rtcSession,
     MatrixRTCSessionEvent.MembershipManagerError,
@@ -184,6 +185,10 @@ export const GroupCallView: FC<Props> = ({
     password: passwordFromUrl,
   } = useUrlParams();
   const e2eeSystem = useRoomEncryptionSystem(room.roomId);
+  const [useNewMembershipManager] = useSetting(useNewMembershipManagerSetting);
+  const [useExperimentalToDeviceTransport] = useSetting(
+    useExperimentalToDeviceTransportSetting,
+  );
 
   // Save the password once we start the groupCallView
   useEffect(() => {
@@ -208,7 +213,7 @@ export const GroupCallView: FC<Props> = ({
 
   // Count each member only once, regardless of how many devices they use
   const participantCount = useMemo(
-    () => new Set<string>(memberships.map((m) => m.userId!)).size,
+    () => new Set<string>(memberships.map((m) => m.sender!)).size,
     [memberships],
   );
 
@@ -218,9 +223,12 @@ export const GroupCallView: FC<Props> = ({
   const enterRTCSessionOrError = useCallback(
     async (rtcSession: MatrixRTCSession): Promise<void> => {
       try {
-        setJoined(true);
-        // TODO-MULTI-SFU what to do with error handling now that we don't use this function?
-        // @BillCarsonFr
+        await enterRTCSession(
+          rtcSession,
+          perParticipantE2EE,
+          useNewMembershipManager,
+          useExperimentalToDeviceTransport,
+        );
       } catch (e) {
         if (e instanceof ElementCallError) {
           setExternalError(e);
@@ -232,9 +240,12 @@ export const GroupCallView: FC<Props> = ({
           setExternalError(error);
         }
       }
-      return Promise.resolve();
     },
-    [setJoined],
+    [
+      perParticipantE2EE,
+      useExperimentalToDeviceTransport,
+      useNewMembershipManager,
+    ],
   );
 
   useEffect(() => {
@@ -253,7 +264,7 @@ export const GroupCallView: FC<Props> = ({
         if (!deviceId) {
           logger.warn("Unknown audio input: " + audioInput);
           // override the default mute state
-          latestMuteStates.current!.audio.setEnabled$.value?.(false);
+          latestMuteStates.current!.audio.setEnabled?.(false);
         } else {
           logger.debug(
             `Found audio input ID ${deviceId} for name ${audioInput}`,
@@ -267,7 +278,7 @@ export const GroupCallView: FC<Props> = ({
         if (!deviceId) {
           logger.warn("Unknown video input: " + videoInput);
           // override the default mute state
-          latestMuteStates.current!.video.setEnabled$.value?.(false);
+          latestMuteStates.current!.video.setEnabled?.(false);
         } else {
           logger.debug(
             `Found video input ID ${deviceId} for name ${videoInput}`,
@@ -283,7 +294,7 @@ export const GroupCallView: FC<Props> = ({
         const onJoin = (ev: CustomEvent<IWidgetApiRequest>): void => {
           (async (): Promise<void> => {
             await defaultDeviceSetup(ev.detail.data as unknown as JoinCallData);
-            setJoined(true);
+            await enterRTCSessionOrError(rtcSession);
             widget.api.transport.reply(ev.detail, {});
           })().catch((e) => {
             logger.error("Error joining RTC session on preload", e);
@@ -295,7 +306,11 @@ export const GroupCallView: FC<Props> = ({
         };
       } else {
         // No lobby and no preload: we enter the rtc session right away
-        setJoined(true);
+        (async (): Promise<void> => {
+          await enterRTCSessionOrError(rtcSession);
+        })().catch((e) => {
+          logger.error("Error joining RTC session immediately", e);
+        });
       }
     }
   }, [
@@ -306,88 +321,61 @@ export const GroupCallView: FC<Props> = ({
     perParticipantE2EE,
     mediaDevices,
     latestMuteStates,
-    setJoined,
+    enterRTCSessionOrError,
+    useNewMembershipManager,
   ]);
 
-  // TODO refactor this + "joined" to just one callState
   const [left, setLeft] = useState(false);
 
   const navigate = useNavigate();
 
-  // TODO split this into leave and onDisconnect
-  const onLeft = useCallback(
+  const onLeave = useCallback(
     (
-      reason: "timeout" | "user" | "allOthersLeft" | "decline" | "error",
+      cause: "user" | "error" = "user",
+      playSound: CallEventSounds = "left",
     ): void => {
-      let playSound: CallEventSounds = "left";
-      if (reason === "timeout" || reason === "decline") playSound = reason;
-
-      setJoined(false);
-      setLeft(true);
       const audioPromise = leaveSoundContext.current?.playSound(playSound);
-      // We need to wait until the callEnded event is tracked on PostHog,
-      // otherwise the iframe may get killed first.
+      // In embedded/widget mode the iFrame will be killed right after the call ended prohibiting the posthog event from getting sent,
+      // therefore we want the event to be sent instantly without getting queued/batched.
+      const sendInstantly = !!widget;
+      setLeft(true);
+      // we need to wait until the callEnded event is tracked on posthog.
+      // Otherwise the iFrame gets killed before the callEnded event got tracked.
       const posthogRequest = new Promise((resolve) => {
-        // To increase the likelihood of the PostHog event being sent out in
-        // widget mode before the iframe is killed, we ask it to skip the
-        // usual queuing/batching of requests.
-        const sendInstantly = widget !== null;
         PosthogAnalytics.instance.eventCallEnded.track(
           room.roomId,
           rtcSession.memberships.length,
           sendInstantly,
           rtcSession,
         );
-        // Unfortunately the PostHog library provides no way to await the
-        // tracking of an event, but we don't really want it to hold up the
-        // closing of the widget that long anyway, so giving it 10 ms will do.
         window.setTimeout(resolve, 10);
       });
 
-      void Promise.all([audioPromise, posthogRequest])
-        .catch((e) =>
-          logger.error(
-            "Failed to play leave audio and/or send PostHog leave event",
-            e,
-          ),
-        )
+      leaveRTCSession(
+        rtcSession,
+        cause,
+        // Wait for the sound in widget mode (it's not long)
+        Promise.all([audioPromise, posthogRequest]),
+      )
+        // Only sends matrix leave event. The Livekit session will disconnect once the ActiveCall-view unmounts.
         .then(async () => {
           if (
             !isPasswordlessUser &&
             !confineToRoom &&
             !PosthogAnalytics.instance.isEnabled()
-          )
-            void navigate("/");
-
-          if (widget) {
-            // After this point the iframe could die at any moment!
-            try {
-              await widget.api.setAlwaysOnScreen(false);
-            } catch (e) {
-              logger.error(
-                "Failed to set call widget `alwaysOnScreen` to false",
-                e,
-              );
-            }
-            // On a normal user hangup we can shut down and close the widget. But if an
-            // error occurs we should keep the widget open until the user reads it.
-            if (reason != "error" && !getUrlParams().returnToLobby) {
-              try {
-                await widget.api.transport.send(ElementWidgetActions.Close, {});
-              } catch (e) {
-                logger.error("Failed to send close action", e);
-              }
-              widget.api.transport.stop();
-            }
+          ) {
+            await navigate("/");
           }
+        })
+        .catch((e) => {
+          logger.error("Error leaving RTC session", e);
         });
     },
     [
-      setJoined,
       leaveSoundContext,
       widget,
-      room.roomId,
       rtcSession,
+      room.roomId,
       isPasswordlessUser,
       confineToRoom,
       navigate,
@@ -395,12 +383,25 @@ export const GroupCallView: FC<Props> = ({
   );
 
   useEffect(() => {
-    if (widget && joined)
+    if (widget && isJoined) {
       // set widget to sticky once joined.
       widget.api.setAlwaysOnScreen(true).catch((e) => {
         logger.error("Error calling setAlwaysOnScreen(true)", e);
       });
-  }, [widget, joined, rtcSession]);
+
+      const onHangup = (ev: CustomEvent<IWidgetApiRequest>): void => {
+        widget.api.transport.reply(ev.detail, {});
+        // Only sends matrix leave event. The Livekit session will disconnect once the ActiveCall-view unmounts.
+        leaveRTCSession(rtcSession, "user").catch((e) => {
+          logger.error("Failed to leave RTC session", e);
+        });
+      };
+      widget.lazyActions.once(ElementWidgetActions.HangupCall, onHangup);
+      return (): void => {
+        widget.lazyActions.off(ElementWidgetActions.HangupCall, onHangup);
+      };
+    }
+  }, [widget, isJoined, rtcSession]);
 
   const joinRule = useJoinRule(room);
 
@@ -435,7 +436,7 @@ export const GroupCallView: FC<Props> = ({
         client={client}
         matrixInfo={matrixInfo}
         muteStates={muteStates}
-        onEnter={() => setJoined(true)}
+        onEnter={async () => enterRTCSessionOrError(rtcSession)}
         confineToRoom={confineToRoom}
         hideHeader={header === HeaderStyle.None}
         participantCount={participantCount}
@@ -453,7 +454,7 @@ export const GroupCallView: FC<Props> = ({
       throw externalError;
     };
     body = <ErrorComponent />;
-  } else if (joined) {
+  } else if (isJoined) {
     body = (
       <>
         {shareModal}
@@ -462,7 +463,7 @@ export const GroupCallView: FC<Props> = ({
           matrixInfo={matrixInfo}
           rtcSession={rtcSession as MatrixRTCSession}
           matrixRoom={room}
-          onLeft={onLeft}
+          onLeave={onLeave}
           header={header}
           muteStates={muteStates}
           e2eeSystem={e2eeSystem}
@@ -523,7 +524,7 @@ export const GroupCallView: FC<Props> = ({
       }}
       onError={
         (/**error*/) => {
-          if (rtcSession.isJoined()) onLeft("error");
+          if (rtcSession.isJoined()) onLeave("error");
         }
       }
     >

src/room/InCallView.test.tsx

@@ -13,15 +13,18 @@ import {
   type MockedFunction,
   vi,
 } from "vitest";
-import { render, type RenderResult } from "@testing-library/react";
+import { act, render, type RenderResult } from "@testing-library/react";
 import { type MatrixClient, JoinRule, type RoomState } from "matrix-js-sdk";
+import { type MatrixRTCSession } from "matrix-js-sdk/lib/matrixrtc";
 import { type RelationsContainer } from "matrix-js-sdk/lib/models/relations-container";
 import { type LocalParticipant } from "livekit-client";
 import { of } from "rxjs";
 import { BrowserRouter } from "react-router-dom";
 import { TooltipProvider } from "@vector-im/compound-web";
 import { RoomContext, useLocalParticipant } from "@livekit/components-react";
+import { RoomAndToDeviceEvents } from "matrix-js-sdk/lib/matrixrtc/RoomAndToDeviceKeyTransport";
 
+import { type MuteStates } from "./MuteStates";
 import { InCallView } from "./InCallView";
 import {
   mockLivekitRoom,
@@ -29,7 +32,6 @@ import {
   mockMatrixRoom,
   mockMatrixRoomMember,
   mockMediaDevices,
-  mockMuteStates,
   mockRemoteParticipant,
   mockRtcMembership,
   type MockRTCSession,
@@ -37,12 +39,19 @@ import {
 import { E2eeType } from "../e2ee/e2eeType";
 import { getBasicCallViewModelEnvironment } from "../utils/test-viewmodel";
 import { alice, local } from "../utils/test-fixtures";
+import {
+  developerMode as developerModeSetting,
+  useExperimentalToDeviceTransport as useExperimentalToDeviceTransportSetting,
+} from "../settings/settings";
 import { ReactionsSenderProvider } from "../reactions/useReactionsSender";
 import { useRoomEncryptionSystem } from "../e2ee/sharedKeyManagement";
-import { LivekitRoomAudioRenderer } from "../livekit/MatrixAudioRenderer";
+import { MatrixAudioRenderer } from "../livekit/MatrixAudioRenderer";
 import { MediaDevicesContext } from "../MediaDevicesContext";
 import { HeaderStyle } from "../UrlParams";
 
+// vi.hoisted(() => {
+//   localStorage = {} as unknown as Storage;
+// });
 vi.hoisted(
   () =>
     (global.ImageData = class MockImageData {
@@ -55,7 +64,6 @@ vi.mock("../useAudioContext");
 vi.mock("../tile/GridTile");
 vi.mock("../tile/SpotlightTile");
 vi.mock("@livekit/components-react");
-vi.mock("livekit-client/e2ee-worker?worker");
 vi.mock("../e2ee/sharedKeyManagement");
 vi.mock("../livekit/MatrixAudioRenderer");
 vi.mock("react-use-measure", () => ({
@@ -80,7 +88,7 @@ beforeEach(() => {
 
   // MatrixAudioRenderer is tested separately.
   (
-    LivekitRoomAudioRenderer as MockedFunction<typeof LivekitRoomAudioRenderer>
+    MatrixAudioRenderer as MockedFunction<typeof MatrixAudioRenderer>
   ).mockImplementation((_props) => {
     return <div>mocked: MatrixAudioRenderer</div>;
   });
@@ -103,10 +111,9 @@ function createInCallView(): RenderResult & {
 } {
   const client = {
     getUser: () => null,
-    getUserId: () => localRtcMember.userId,
+    getUserId: () => localRtcMember.sender,
     getDeviceId: () => localRtcMember.deviceId,
     getRoom: (rId) => (rId === roomId ? room : null),
-    getDomain: () => "example.com",
   } as Partial<MatrixClient> as MatrixClient;
   const room = mockMatrixRoom({
     relations: {
@@ -117,8 +124,7 @@ function createInCallView(): RenderResult & {
     } as unknown as RelationsContainer,
     client,
     roomId,
-    // getMember: (userId) => roomMembers.get(userId) ?? null,
-    getMembers: () => Array.from(roomMembers.values()),
+    getMember: (userId) => roomMembers.get(userId) ?? null,
     getMxcAvatarUrl: () => null,
     hasEncryptionStateEvent: vi.fn().mockReturnValue(true),
     getCanonicalAlias: () => null,
@@ -127,7 +133,10 @@ function createInCallView(): RenderResult & {
     } as Partial<RoomState> as RoomState,
   });
 
-  const muteState = mockMuteStates();
+  const muteState = {
+    audio: { enabled: false },
+    video: { enabled: false },
+  } as MuteStates;
   const livekitRoom = mockLivekitRoom(
     {
       localParticipant,
@@ -144,14 +153,14 @@ function createInCallView(): RenderResult & {
       <MediaDevicesContext value={mockMediaDevices({})}>
         <ReactionsSenderProvider
           vm={vm}
-          rtcSession={rtcSession.asMockedSession()}
+          rtcSession={rtcSession as unknown as MatrixRTCSession}
         >
           <TooltipProvider>
             <RoomContext value={livekitRoom}>
               <InCallView
                 client={client}
                 header={HeaderStyle.Standard}
-                rtcSession={rtcSession.asMockedSession()}
+                rtcSession={rtcSession as unknown as MatrixRTCSession}
                 muteStates={muteState}
                 vm={vm}
                 matrixInfo={{
@@ -167,6 +176,10 @@ function createInCallView(): RenderResult & {
                   },
                 }}
                 matrixRoom={room}
+                livekitRoom={livekitRoom}
+                onLeave={function (): void {
+                  throw new Error("Function not implemented.");
+                }}
                 onShareClick={null}
               />
             </RoomContext>
@@ -188,4 +201,71 @@ describe("InCallView", () => {
       expect(container).toMatchSnapshot();
     });
   });
+  describe("toDevice label", () => {
+    it("is shown if setting activated and room encrypted", () => {
+      useRoomEncryptionSystemMock.mockReturnValue({
+        kind: E2eeType.PER_PARTICIPANT,
+      });
+      useExperimentalToDeviceTransportSetting.setValue(true);
+      developerModeSetting.setValue(true);
+      const { getByText } = createInCallView();
+      expect(getByText("using to Device key transport")).toBeInTheDocument();
+    });
+
+    it("is not shown in unenecrypted room", () => {
+      useRoomEncryptionSystemMock.mockReturnValue({
+        kind: E2eeType.NONE,
+      });
+      useExperimentalToDeviceTransportSetting.setValue(true);
+      developerModeSetting.setValue(true);
+      const { queryByText } = createInCallView();
+      expect(
+        queryByText("using to Device key transport"),
+      ).not.toBeInTheDocument();
+    });
+
+    it("is hidden once fallback was triggered", async () => {
+      useRoomEncryptionSystemMock.mockReturnValue({
+        kind: E2eeType.PER_PARTICIPANT,
+      });
+      useExperimentalToDeviceTransportSetting.setValue(true);
+      developerModeSetting.setValue(true);
+      const { rtcSession, queryByText } = createInCallView();
+      expect(queryByText("using to Device key transport")).toBeInTheDocument();
+      expect(rtcSession).toBeDefined();
+      await act(() =>
+        rtcSession.emit(RoomAndToDeviceEvents.EnabledTransportsChanged, {
+          toDevice: true,
+          room: true,
+        }),
+      );
+      expect(
+        queryByText("using to Device key transport"),
+      ).not.toBeInTheDocument();
+    });
+
+    it("is not shown if setting is disabled", () => {
+      useExperimentalToDeviceTransportSetting.setValue(false);
+      developerModeSetting.setValue(true);
+      useRoomEncryptionSystemMock.mockReturnValue({
+        kind: E2eeType.PER_PARTICIPANT,
+      });
+      const { queryByText } = createInCallView();
+      expect(
+        queryByText("using to Device key transport"),
+      ).not.toBeInTheDocument();
+    });
+
+    it("is not shown if developer mode is disabled", () => {
+      useExperimentalToDeviceTransportSetting.setValue(true);
+      developerModeSetting.setValue(false);
+      useRoomEncryptionSystemMock.mockReturnValue({
+        kind: E2eeType.PER_PARTICIPANT,
+      });
+      const { queryByText } = createInCallView();
+      expect(
+        queryByText("using to Device key transport"),
+      ).not.toBeInTheDocument();
+    });
+  });
 });

src/room/InCallView.tsx

@@ -5,7 +5,9 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE in the repository root for full details.
 */
 
+import { RoomContext, useLocalParticipant } from "@livekit/components-react";
 import { IconButton, Text, Tooltip } from "@vector-im/compound-web";
+import { ConnectionState, type Room as LivekitRoom } from "livekit-client";
 import { type MatrixClient, type Room as MatrixRoom } from "matrix-js-sdk";
 import {
   type FC,
@@ -23,8 +25,13 @@ import useMeasure from "react-use-measure";
 import { type MatrixRTCSession } from "matrix-js-sdk/lib/matrixrtc";
 import classNames from "classnames";
 import { BehaviorSubject, map } from "rxjs";
-import { useObservable } from "observable-hooks";
-import { logger as rootLogger } from "matrix-js-sdk/lib/logger";
+import {
+  useObservable,
+  useObservableEagerState,
+  useSubscription,
+} from "observable-hooks";
+import { logger } from "matrix-js-sdk/lib/logger";
+import { RoomAndToDeviceEvents } from "matrix-js-sdk/lib/matrixrtc/RoomAndToDeviceKeyTransport";
 import {
   VoiceCallSolidIcon,
   VolumeOnSolidIcon,
@@ -52,21 +59,26 @@ import { type OTelGroupCallMembership } from "../otel/OTelGroupCallMembership";
 import { SettingsModal, defaultSettingsTab } from "../settings/SettingsModal";
 import { useRageshakeRequestModal } from "../settings/submit-rageshake";
 import { RageshakeRequestModal } from "./RageshakeRequestModal";
+import { useLivekit } from "../livekit/useLivekit.ts";
 import { useWakeLock } from "../useWakeLock";
 import { useMergedRefs } from "../useMergedRefs";
-import { type MuteStates } from "../state/MuteStates";
+import { type MuteStates } from "./MuteStates";
 import { type MatrixInfo } from "./VideoPreview";
 import { InviteButton } from "../button/InviteButton";
 import { LayoutToggle } from "./LayoutToggle";
+import { useOpenIDSFU } from "../livekit/openIDSFU";
 import {
-  type CallViewModel,
-  createCallViewModel$,
+  CallViewModel,
   type GridMode,
-} from "../state/CallViewModel/CallViewModel.ts";
+  type Layout,
+} from "../state/CallViewModel";
 import { Grid, type TileProps } from "../grid/Grid";
 import { useInitial } from "../useInitial";
 import { SpotlightTile } from "../tile/SpotlightTile";
-import { type EncryptionSystem } from "../e2ee/sharedKeyManagement";
+import {
+  useRoomEncryptionSystem,
+  type EncryptionSystem,
+} from "../e2ee/sharedKeyManagement";
 import { E2eeType } from "../e2ee/e2eeType";
 import { makeGridLayout } from "../grid/GridLayout";
 import {
@@ -85,15 +97,22 @@ import {
 } from "../reactions/useReactionsSender";
 import { ReactionsAudioRenderer } from "./ReactionAudioRenderer";
 import { ReactionsOverlay } from "./ReactionsOverlay";
-import { CallEventAudioRenderer } from "./CallEventAudioRenderer";
+import {
+  CallEventAudioRenderer,
+  type CallEventSounds,
+} from "./CallEventAudioRenderer";
 import {
   debugTileLayout as debugTileLayoutSetting,
-  matrixRTCMode as matrixRTCModeSetting,
+  useExperimentalToDeviceTransport as useExperimentalToDeviceTransportSetting,
+  developerMode as developerModeSetting,
   useSetting,
 } from "../settings/settings";
 import { ReactionsReader } from "../reactions/ReactionsReader";
-import { LivekitRoomAudioRenderer } from "../livekit/MatrixAudioRenderer.tsx";
+import { ConnectionLostError } from "../utils/errors.ts";
+import { useTypedEventEmitter } from "../useEvents.ts";
+import { MatrixAudioRenderer } from "../livekit/MatrixAudioRenderer.tsx";
 import { muteAllAudio$ } from "../state/MuteAllAudioModel.ts";
+import { useMatrixRTCSessionMemberships } from "../useMatrixRTCSessionMemberships.ts";
 import { useMediaDevices } from "../MediaDevicesContext.ts";
 import { EarpieceOverlay } from "./EarpieceOverlay.tsx";
 import { useAppBarHidden, useAppBarSecondaryButton } from "../AppBar.tsx";
@@ -106,78 +125,105 @@ import { prefetchSounds } from "../soundUtils";
 import { useAudioContext } from "../useAudioContext";
 import ringtoneMp3 from "../sound/ringtone.mp3?url";
 import ringtoneOgg from "../sound/ringtone.ogg?url";
-import { useTrackProcessorObservable$ } from "../livekit/TrackProcessorContext.tsx";
-import { type Layout } from "../state/layout-types.ts";
 import { ObservableScope } from "../state/ObservableScope.ts";
 
-const logger = rootLogger.getChild("[InCallView]");
+const canScreenshare = "getDisplayMedia" in (navigator.mediaDevices ?? {});
 
 const maxTapDurationMs = 400;
 
 export interface ActiveCallProps
   extends Omit<InCallViewProps, "vm" | "livekitRoom" | "connState"> {
   e2eeSystem: EncryptionSystem;
-  // TODO refactor those reasons into an enum
-  onLeft: (
-    reason: "user" | "timeout" | "decline" | "allOthersLeft" | "error",
-  ) => void;
 }
 
 export const ActiveCall: FC<ActiveCallProps> = (props) => {
+  const mediaDevices = useMediaDevices();
+  const sfuConfig = useOpenIDSFU(props.client, props.rtcSession);
+  const { livekitRoom, connState } = useLivekit(
+    props.rtcSession,
+    props.muteStates,
+    sfuConfig,
+    props.e2eeSystem,
+  );
+  const observableScope = useInitial(() => new ObservableScope());
+  const connStateBehavior$ = useObservable(
+    (inputs$) =>
+      observableScope.behavior(
+        inputs$.pipe(map(([connState]) => connState)),
+        connState,
+      ),
+    [connState],
+  );
   const [vm, setVm] = useState<CallViewModel | null>(null);
 
-  const urlParams = useUrlParams();
-  const mediaDevices = useMediaDevices();
-  const trackProcessorState$ = useTrackProcessorObservable$();
   useEffect(() => {
-    logger.info("START CALL VIEW SCOPE");
-    const scope = new ObservableScope();
-    const reactionsReader = new ReactionsReader(scope, props.rtcSession);
-    const { autoLeaveWhenOthersLeft, waitForCallPickup, sendNotificationType } =
-      urlParams;
-    const vm = createCallViewModel$(
-      scope,
-      props.rtcSession,
-      props.matrixRoom,
-      mediaDevices,
-      props.muteStates,
-      {
-        encryptionSystem: props.e2eeSystem,
-        autoLeaveWhenOthersLeft,
-        waitForCallPickup: waitForCallPickup && sendNotificationType === "ring",
-        matrixRTCMode$: matrixRTCModeSetting.value$,
-      },
-      reactionsReader.raisedHands$,
-      reactionsReader.reactions$,
-      scope.behavior(trackProcessorState$),
+    logger.info(
+      `[Lifecycle] InCallView Component mounted, livekit room state ${livekitRoom?.state}`,
     );
-    // TODO move this somewhere else once we use the callViewModel in the lobby as well!
-    vm.join();
-    setVm(vm);
-
-    vm.leave$.pipe(scope.bind()).subscribe(props.onLeft);
-
     return (): void => {
-      logger.info("END CALL VIEW SCOPE");
-      scope.end();
+      logger.info(
+        `[Lifecycle] InCallView Component unmounted, livekit room state ${livekitRoom?.state}`,
+      );
+      livekitRoom
+        ?.disconnect()
+        .then(() => {
+          logger.info(
+            `[Lifecycle] Disconnected from livekit room, state:${livekitRoom?.state}`,
+          );
+        })
+        .catch((e) => {
+          logger.error("[Lifecycle] Failed to disconnect from livekit room", e);
+        });
     };
+  }, [livekitRoom]);
+
+  const { autoLeaveWhenOthersLeft, sendNotificationType, waitForCallPickup } =
+    useUrlParams();
+
+  useEffect(() => {
+    if (livekitRoom !== undefined) {
+      const reactionsReader = new ReactionsReader(props.rtcSession);
+      const vm = new CallViewModel(
+        props.rtcSession,
+        props.matrixRoom,
+        livekitRoom,
+        mediaDevices,
+        {
+          encryptionSystem: props.e2eeSystem,
+          autoLeaveWhenOthersLeft,
+          waitForCallPickup:
+            waitForCallPickup && sendNotificationType === "ring",
+        },
+        connStateBehavior$,
+        reactionsReader.raisedHands$,
+        reactionsReader.reactions$,
+      );
+      setVm(vm);
+      return (): void => {
+        vm.destroy();
+        reactionsReader.destroy();
+      };
+    }
   }, [
     props.rtcSession,
     props.matrixRoom,
-    props.muteStates,
-    props.e2eeSystem,
-    props.onLeft,
-    urlParams,
+    livekitRoom,
     mediaDevices,
-    trackProcessorState$,
+    props.e2eeSystem,
+    connStateBehavior$,
+    autoLeaveWhenOthersLeft,
+    sendNotificationType,
+    waitForCallPickup,
   ]);
 
-  if (vm === null) return null;
+  if (livekitRoom === undefined || vm === null) return null;
 
   return (
-    <ReactionsSenderProvider vm={vm} rtcSession={props.rtcSession}>
-      <InCallView {...props} vm={vm} />
-    </ReactionsSenderProvider>
+    <RoomContext value={livekitRoom}>
+      <ReactionsSenderProvider vm={vm} rtcSession={props.rtcSession}>
+        <InCallView {...props} vm={vm} livekitRoom={livekitRoom} />
+      </ReactionsSenderProvider>
+    </RoomContext>
   );
 };
 
@@ -187,7 +233,10 @@ export interface InCallViewProps {
   matrixInfo: MatrixInfo;
   rtcSession: MatrixRTCSession;
   matrixRoom: MatrixRoom;
+  livekitRoom: LivekitRoom;
   muteStates: MuteStates;
+  /** Function to call when the user explicitly ends the call */
+  onLeave: (cause: "user", soundFile?: CallEventSounds) => void;
   header: HeaderStyle;
   otelGroupCallMembership?: OTelGroupCallMembership;
   onShareClick: (() => void) | null;
@@ -197,9 +246,11 @@ export const InCallView: FC<InCallViewProps> = ({
   client,
   vm,
   matrixInfo,
+  rtcSession,
   matrixRoom,
+  livekitRoom,
   muteStates,
-
+  onLeave,
   header: headerStyle,
   onShareClick,
 }) => {
@@ -208,23 +259,23 @@ export const InCallView: FC<InCallViewProps> = ({
     useReactionsSender();
 
   useWakeLock();
-  // TODO-MULTI-SFU This is unused now??
-  // const connectionState = useObservableEagerState(vm.livekitConnectionState$);
+  const connectionState = useObservableEagerState(vm.livekitConnectionState$);
 
   // annoyingly we don't get the disconnection reason this way,
   // only by listening for the emitted event
-  // This needs to be done differential. with the vm connection state we start with Disconnected.
-  // TODO-MULTI-SFU decide how to handle this properly
-  // @BillCarsonFr
-  // if (connectionState === ConnectionState.Disconnected)
-  //   throw new ConnectionLostError();
+  if (connectionState === ConnectionState.Disconnected)
+    throw new ConnectionLostError();
 
   const containerRef1 = useRef<HTMLDivElement | null>(null);
   const [containerRef2, bounds] = useMeasure();
   // Merge the refs so they can attach to the same element
   const containerRef = useMergedRefs(containerRef1, containerRef2);
 
-  const { showControls } = useUrlParams();
+  const { hideScreensharing, showControls } = useUrlParams();
+
+  const { isScreenShareEnabled, localParticipant } = useLocalParticipant({
+    room: livekitRoom,
+  });
 
   const muteAllAudio = useBehavior(muteAllAudio$);
   // Call pickup state and display names are needed for waiting overlay/sounds
@@ -243,24 +294,55 @@ export const InCallView: FC<InCallViewProps> = ({
     muted: muteAllAudio,
   });
 
-  const audioEnabled = useBehavior(muteStates.audio.enabled$);
-  const videoEnabled = useBehavior(muteStates.video.enabled$);
-  const toggleAudio = useBehavior(muteStates.audio.toggle$);
-  const toggleVideo = useBehavior(muteStates.video.toggle$);
-  const setAudioEnabled = useBehavior(muteStates.audio.setEnabled$);
+  // This seems like it might be enough logic to use move it into the call view model?
+  const [didFallbackToRoomKey, setDidFallbackToRoomKey] = useState(false);
+  useTypedEventEmitter(
+    rtcSession,
+    RoomAndToDeviceEvents.EnabledTransportsChanged,
+    (enabled) => setDidFallbackToRoomKey(enabled.room),
+  );
+
+  const [developerMode] = useSetting(developerModeSetting);
+  const [useExperimentalToDeviceTransport] = useSetting(
+    useExperimentalToDeviceTransportSetting,
+  );
+  const encryptionSystem = useRoomEncryptionSystem(matrixRoom.roomId);
+  const memberships = useMatrixRTCSessionMemberships(rtcSession);
+
+  const showToDeviceEncryption = useMemo(
+    () =>
+      developerMode &&
+      useExperimentalToDeviceTransport &&
+      encryptionSystem.kind === E2eeType.PER_PARTICIPANT &&
+      !didFallbackToRoomKey,
+    [
+      developerMode,
+      useExperimentalToDeviceTransport,
+      encryptionSystem.kind,
+      didFallbackToRoomKey,
+    ],
+  );
+
+  const toggleMicrophone = useCallback(
+    () => muteStates.audio.setEnabled?.((e) => !e),
+    [muteStates],
+  );
+  const toggleCamera = useCallback(
+    () => muteStates.video.setEnabled?.((e) => !e),
+    [muteStates],
+  );
 
   // This function incorrectly assumes that there is a camera and microphone, which is not always the case.
   // TODO: Make sure that this module is resilient when it comes to camera/microphone availability!
   useCallViewKeyboardShortcuts(
     containerRef1,
-    toggleAudio,
-    toggleVideo,
-    setAudioEnabled,
+    toggleMicrophone,
+    toggleCamera,
+    (muted) => muteStates.audio.setEnabled?.(!muted),
     (reaction) => void sendReaction(reaction),
     () => void toggleRaisedHand(),
   );
 
-  const audioParticipants = useBehavior(vm.livekitRoomItems$);
   const participantCount = useBehavior(vm.participantCount$);
   const reconnecting = useBehavior(vm.reconnecting$);
   const windowMode = useBehavior(vm.windowMode$);
@@ -272,15 +354,7 @@ export const InCallView: FC<InCallViewProps> = ({
   const showFooter = useBehavior(vm.showFooter$);
   const earpieceMode = useBehavior(vm.earpieceMode$);
   const audioOutputSwitcher = useBehavior(vm.audioOutputSwitcher$);
-  const sharingScreen = useBehavior(vm.sharingScreen$);
-
-  const ringOverlay = useBehavior(vm.ringOverlay$);
-  const fatalCallError = useBehavior(vm.fatalError$);
-  // Stop the rendering and throw for the error boundary
-  if (fatalCallError) {
-    logger.debug("fatalCallError stop rendering", fatalCallError);
-    throw fatalCallError;
-  }
+  useSubscription(vm.autoLeave$, () => onLeave("user"));
 
   // We need to set the proper timings on the animation based upon the sound length.
   const ringDuration = pickupPhaseAudio?.soundDuration["waiting"] ?? 1;
@@ -301,6 +375,16 @@ export const InCallView: FC<InCallViewProps> = ({
     };
   }, [pickupPhaseAudio?.soundDuration, ringDuration]);
 
+  // When we enter timeout or decline we will leave the call.
+  useEffect((): void | (() => void) => {
+    if (callPickupState === "timeout") {
+      onLeave("user", "timeout");
+    }
+    if (callPickupState === "decline") {
+      onLeave("user", "decline");
+    }
+  }, [callPickupState, onLeave, pickupPhaseAudio]);
+
   // When waiting for pickup, loop a waiting sound
   useEffect((): void | (() => void) => {
     if (callPickupState !== "ringing" || !pickupPhaseAudio) return;
@@ -314,26 +398,46 @@ export const InCallView: FC<InCallViewProps> = ({
 
   // Waiting UI overlay
   const waitingOverlay: JSX.Element | null = useMemo(() => {
-    return ringOverlay ? (
+    // No overlay if not in ringing state
+    if (callPickupState !== "ringing") return null;
+
+    // Use room state for other participants data (the one that we likely want to reach)
+    const roomOthers = [
+      ...matrixRoom.getMembersWithMembership("join"),
+      ...matrixRoom.getMembersWithMembership("invite"),
+    ].filter((m) => m.userId !== client.getUserId());
+    // Yield if there are not other members in the room.
+    if (roomOthers.length === 0) return null;
+
+    const otherMember = roomOthers.length > 0 ? roomOthers[0] : undefined;
+    const isOneOnOne = roomOthers.length === 1 && otherMember;
+    const text = isOneOnOne
+      ? `Waiting for ${otherMember.name ?? otherMember.userId} to join…`
+      : "Waiting for other participants…";
+    const avatarMxc = isOneOnOne
+      ? (otherMember.getMxcAvatarUrl?.() ?? undefined)
+      : (matrixRoom.getMxcAvatarUrl() ?? undefined);
+
+    return (
       <div className={classNames(overlayStyles.bg, waitingStyles.overlay)}>
         <div
           className={classNames(overlayStyles.content, waitingStyles.content)}
         >
           <div className={waitingStyles.pulse}>
             <Avatar
-              id={ringOverlay.idForAvatar}
-              name={ringOverlay.name}
-              src={ringOverlay.avatarMxc}
+              id={isOneOnOne ? otherMember.userId : matrixRoom.roomId}
+              name={isOneOnOne ? otherMember.name : matrixRoom.name}
+              src={avatarMxc}
               size={AvatarSize.XL}
             />
           </div>
           <Text size="md" className={waitingStyles.text}>
-            {ringOverlay.text}
+            {text}
           </Text>
         </div>
       </div>
-    ) : null;
-  }, [ringOverlay]);
+    );
+  }, [callPickupState, client, matrixRoom]);
 
   // Ideally we could detect taps by listening for click events and checking
   // that the pointerType of the event is "touch", but this isn't yet supported
@@ -701,33 +805,44 @@ export const InCallView: FC<InCallViewProps> = ({
     matrixRoom.roomId,
   );
 
+  const toggleScreensharing = useCallback(() => {
+    localParticipant
+      .setScreenShareEnabled(!isScreenShareEnabled, {
+        audio: true,
+        selfBrowserSurface: "include",
+        surfaceSwitching: "include",
+        systemAudio: "include",
+      })
+      .catch(logger.error);
+  }, [localParticipant, isScreenShareEnabled]);
+
   const buttons: JSX.Element[] = [];
 
   buttons.push(
     <MicButton
       key="audio"
-      muted={!audioEnabled}
-      onClick={toggleAudio ?? undefined}
+      muted={!muteStates.audio.enabled}
+      onClick={toggleMicrophone}
       onTouchEnd={onControlsTouchEnd}
-      disabled={toggleAudio === null}
+      disabled={muteStates.audio.setEnabled === null}
       data-testid="incall_mute"
     />,
     <VideoButton
       key="video"
-      muted={!videoEnabled}
-      onClick={toggleVideo ?? undefined}
+      muted={!muteStates.video.enabled}
+      onClick={toggleCamera}
       onTouchEnd={onControlsTouchEnd}
-      disabled={toggleVideo === null}
+      disabled={muteStates.video.setEnabled === null}
       data-testid="incall_videomute"
     />,
   );
-  if (vm.toggleScreenSharing !== null) {
+  if (canScreenshare && !hideScreensharing) {
     buttons.push(
       <ShareScreenButton
         key="share_screen"
         className={styles.shareScreen}
-        enabled={sharingScreen}
-        onClick={vm.toggleScreenSharing}
+        enabled={isScreenShareEnabled}
+        onClick={toggleScreensharing}
         onTouchEnd={onControlsTouchEnd}
         data-testid="incall_screenshare"
       />,
@@ -757,7 +872,7 @@ export const InCallView: FC<InCallViewProps> = ({
     <EndCallButton
       key="end_call"
       onClick={function (): void {
-        vm.hangup();
+        onLeave("user");
       }}
       onTouchEnd={onControlsTouchEnd}
       data-testid="incall_leave"
@@ -809,15 +924,19 @@ export const InCallView: FC<InCallViewProps> = ({
       onPointerOut={onPointerOut}
     >
       {header}
-      {audioParticipants.map(({ livekitRoom, url, participants }) => (
-        <LivekitRoomAudioRenderer
-          key={url}
-          url={url}
-          livekitRoom={livekitRoom}
-          validIdentities={participants}
-          muted={muteAllAudio}
-        />
-      ))}
+      {
+        // TODO: remove this once we remove the developer flag gets removed and we have shipped to
+        // device transport as the default.
+        showToDeviceEncryption && (
+          <Text
+            style={{ height: 0, zIndex: 1, alignSelf: "center", margin: 0 }}
+            size="sm"
+          >
+            using to Device key transport
+          </Text>
+        )
+      }
+      <MatrixAudioRenderer members={memberships} muted={muteAllAudio} />
       {renderContent()}
       <CallEventAudioRenderer vm={vm} muted={muteAllAudio} />
       <ReactionsAudioRenderer vm={vm} muted={muteAllAudio} />
@@ -836,8 +955,7 @@ export const InCallView: FC<InCallViewProps> = ({
             onDismiss={closeSettings}
             tab={settingsTab}
             onTabChange={setSettingsTab}
-            // TODO expose correct data to setttings modal
-            livekitRooms={[]}
+            livekitRoom={livekitRoom}
           />
         </>
       )}

src/room/LobbyView.tsx

@@ -31,7 +31,7 @@ import inCallStyles from "./InCallView.module.css";
 import styles from "./LobbyView.module.css";
 import { Header, LeftNav, RightNav, RoomHeaderInfo } from "../Header";
 import { type MatrixInfo, VideoPreview } from "./VideoPreview";
-import { type MuteStates } from "../state/MuteStates";
+import { type MuteStates } from "./MuteStates";
 import { InviteButton } from "../button/InviteButton";
 import {
   EndCallButton,
@@ -50,14 +50,14 @@ import {
   useTrackProcessorSync,
 } from "../livekit/TrackProcessorContext";
 import { usePageTitle } from "../usePageTitle";
+import { useLatest } from "../useLatest";
 import { getValue } from "../utils/observable";
-import { useBehavior } from "../useBehavior";
 
 interface Props {
   client: MatrixClient;
   matrixInfo: MatrixInfo;
   muteStates: MuteStates;
-  onEnter: () => void;
+  onEnter: () => Promise<void>;
   enterLabel?: JSX.Element | string;
   confineToRoom: boolean;
   hideHeader: boolean;
@@ -79,19 +79,23 @@ export const LobbyView: FC<Props> = ({
   waitingForInvite,
 }) => {
   useEffect(() => {
-    logger.info("[Lifecycle] LobbyView Component mounted");
+    logger.info("[Lifecycle] GroupCallView Component mounted");
     return (): void => {
-      logger.info("[Lifecycle] LobbyView Component unmounted");
+      logger.info("[Lifecycle] GroupCallView Component unmounted");
     };
   }, []);
 
   const { t } = useTranslation();
   usePageTitle(matrixInfo.roomName);
 
-  const audioEnabled = useBehavior(muteStates.audio.enabled$);
-  const videoEnabled = useBehavior(muteStates.video.enabled$);
-  const toggleAudio = useBehavior(muteStates.audio.toggle$);
-  const toggleVideo = useBehavior(muteStates.video.toggle$);
+  const onAudioPress = useCallback(
+    () => muteStates.audio.setEnabled?.((e) => !e),
+    [muteStates],
+  );
+  const onVideoPress = useCallback(
+    () => muteStates.video.setEnabled?.((e) => !e),
+    [muteStates],
+  );
 
   const [settingsModalOpen, setSettingsModalOpen] = useState(false);
   const [settingsTab, setSettingsTab] = useState(defaultSettingsTab);
@@ -129,7 +133,7 @@ export const LobbyView: FC<Props> = ({
   // re-open the devices when they change (see below).
   const initialAudioOptions = useInitial(
     () =>
-      audioEnabled && {
+      muteStates.audio.enabled && {
         deviceId: getValue(devices.audioInput.selected$)?.id,
       },
   );
@@ -146,21 +150,27 @@ export const LobbyView: FC<Props> = ({
       // We also pass in a clone because livekit mutates the object passed in,
       // which would cause the devices to be re-opened on the next render.
       audio: Object.assign({}, initialAudioOptions),
-      video: videoEnabled && {
+      video: muteStates.video.enabled && {
         deviceId: videoInputId,
         processor: initialProcessor,
       },
     }),
-    [initialAudioOptions, videoEnabled, videoInputId, initialProcessor],
+    [
+      initialAudioOptions,
+      muteStates.video.enabled,
+      videoInputId,
+      initialProcessor,
+    ],
   );
 
+  const latestMuteStates = useLatest(muteStates);
   const onError = useCallback(
     (error: Error) => {
       logger.error("Error while creating preview Tracks:", error);
-      muteStates.audio.setEnabled$.value?.(false);
-      muteStates.video.setEnabled$.value?.(false);
+      latestMuteStates.current.audio.setEnabled?.(false);
+      latestMuteStates.current.video.setEnabled?.(false);
     },
-    [muteStates],
+    [latestMuteStates],
   );
 
   const tracks = usePreviewTracks(localTrackOptions, onError);
@@ -183,6 +193,14 @@ export const LobbyView: FC<Props> = ({
 
   useTrackProcessorSync(videoTrack);
 
+  const [waitingToEnter, setWaitingToEnter] = useState(false);
+  const onEnterCall = useCallback(() => {
+    setWaitingToEnter(true);
+    void onEnter().finally(() => setWaitingToEnter(false));
+  }, [onEnter]);
+
+  const waiting = waitingForInvite || waitingToEnter;
+
   // TODO: Unify this component with InCallView, so we can get slick joining
   // animations and don't have to feel bad about reusing its CSS
   return (
@@ -207,17 +225,17 @@ export const LobbyView: FC<Props> = ({
         <div className={styles.content}>
           <VideoPreview
             matrixInfo={matrixInfo}
-            videoEnabled={videoEnabled}
+            muteStates={muteStates}
             videoTrack={videoTrack}
           >
             <Button
               className={classNames(styles.join, {
-                [styles.wait]: waitingForInvite,
+                [styles.wait]: waiting,
               })}
-              size={waitingForInvite ? "sm" : "lg"}
-              disabled={waitingForInvite}
+              size={waiting ? "sm" : "lg"}
+              disabled={waiting}
               onClick={() => {
-                if (!waitingForInvite) onEnter();
+                if (!waiting) onEnterCall();
               }}
               data-testid="lobby_joinCall"
             >
@@ -230,14 +248,14 @@ export const LobbyView: FC<Props> = ({
           {recentsButtonInFooter && recentsButton}
           <div className={inCallStyles.buttons}>
             <MicButton
-              muted={!audioEnabled}
-              onClick={toggleAudio ?? undefined}
-              disabled={toggleAudio === null}
+              muted={!muteStates.audio.enabled}
+              onClick={onAudioPress}
+              disabled={muteStates.audio.setEnabled === null}
             />
             <VideoButton
-              muted={!videoEnabled}
-              onClick={toggleVideo ?? undefined}
-              disabled={toggleVideo === null}
+              muted={!muteStates.video.enabled}
+              onClick={onVideoPress}
+              disabled={muteStates.video.setEnabled === null}
             />
             <SettingsButton onClick={openSettings} />
             {!confineToRoom && <EndCallButton onClick={onLeaveClick} />}

src/room/MuteStates.test.tsx

@@ -0,0 +1,323 @@
+/*
+Copyright 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import {
+  afterAll,
+  afterEach,
+  beforeEach,
+  describe,
+  expect,
+  it,
+  onTestFinished,
+  vi,
+} from "vitest";
+import { type FC, useCallback, useState } from "react";
+import { render, screen } from "@testing-library/react";
+import { MemoryRouter } from "react-router-dom";
+import userEvent from "@testing-library/user-event";
+import { createMediaDeviceObserver } from "@livekit/components-core";
+import { of } from "rxjs";
+
+import { useMuteStates } from "./MuteStates";
+import { MediaDevicesContext } from "../MediaDevicesContext";
+import { mockConfig } from "../utils/test";
+import { MediaDevices } from "../state/MediaDevices";
+import { ObservableScope } from "../state/ObservableScope";
+vi.mock("@livekit/components-core");
+
+interface TestComponentProps {
+  isJoined?: boolean;
+}
+
+const TestComponent: FC<TestComponentProps> = ({ isJoined = false }) => {
+  const muteStates = useMuteStates(isJoined);
+  const onToggleAudio = useCallback(
+    () => muteStates.audio.setEnabled?.(!muteStates.audio.enabled),
+    [muteStates],
+  );
+  return (
+    <div>
+      <div data-testid="audio-enabled">
+        {muteStates.audio.enabled.toString()}
+      </div>
+      <button onClick={onToggleAudio}>Toggle audio</button>
+      <div data-testid="video-enabled">
+        {muteStates.video.enabled.toString()}
+      </div>
+    </div>
+  );
+};
+
+const mockMicrophone: MediaDeviceInfo = {
+  deviceId: "",
+  kind: "audioinput",
+  label: "",
+  groupId: "",
+  toJSON() {
+    return {};
+  },
+};
+
+const mockSpeaker: MediaDeviceInfo = {
+  deviceId: "",
+  kind: "audiooutput",
+  label: "",
+  groupId: "",
+  toJSON() {
+    return {};
+  },
+};
+
+const mockCamera: MediaDeviceInfo = {
+  deviceId: "",
+  kind: "videoinput",
+  label: "",
+  groupId: "",
+  toJSON() {
+    return {};
+  },
+};
+
+function mockMediaDevices(
+  {
+    microphone,
+    speaker,
+    camera,
+  }: {
+    microphone?: boolean;
+    speaker?: boolean;
+    camera?: boolean;
+  } = { microphone: true, speaker: true, camera: true },
+): MediaDevices {
+  vi.mocked(createMediaDeviceObserver).mockImplementation((kind) => {
+    switch (kind) {
+      case "audioinput":
+        return of(microphone ? [mockMicrophone] : []);
+      case "audiooutput":
+        return of(speaker ? [mockSpeaker] : []);
+      case "videoinput":
+        return of(camera ? [mockCamera] : []);
+      case undefined:
+        throw new Error("Unimplemented");
+    }
+  });
+  const scope = new ObservableScope();
+  onTestFinished(() => scope.end());
+  return new MediaDevices(scope);
+}
+
+describe("useMuteStates VITE_PACKAGE='full' (SPA) mode", () => {
+  afterEach(() => {
+    vi.clearAllMocks();
+    vi.stubEnv("VITE_PACKAGE", "full");
+  });
+
+  afterAll(() => {
+    vi.resetAllMocks();
+  });
+
+  it("disabled when no input devices", () => {
+    mockConfig();
+
+    render(
+      <MemoryRouter>
+        <MediaDevicesContext
+          value={mockMediaDevices({
+            microphone: false,
+            camera: false,
+          })}
+        >
+          <TestComponent />
+        </MediaDevicesContext>
+      </MemoryRouter>,
+    );
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("false");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("false");
+  });
+
+  it("enables devices by default in the lobby", () => {
+    mockConfig();
+
+    render(
+      <MemoryRouter>
+        <MediaDevicesContext value={mockMediaDevices()}>
+          <TestComponent />
+        </MediaDevicesContext>
+      </MemoryRouter>,
+    );
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("true");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("true");
+  });
+
+  it("disables devices by default in the call", () => {
+    // Disabling new devices in the call ensures that connecting a webcam
+    // mid-call won't cause it to suddenly be enabled without user input
+    mockConfig();
+
+    render(
+      <MemoryRouter>
+        <MediaDevicesContext value={mockMediaDevices()}>
+          <TestComponent isJoined />
+        </MediaDevicesContext>
+      </MemoryRouter>,
+    );
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("false");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("false");
+  });
+
+  it("uses defaults from config", () => {
+    mockConfig({
+      media_devices: {
+        enable_audio: false,
+        enable_video: false,
+      },
+    });
+
+    render(
+      <MemoryRouter>
+        <MediaDevicesContext value={mockMediaDevices()}>
+          <TestComponent />
+        </MediaDevicesContext>
+      </MemoryRouter>,
+    );
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("false");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("false");
+  });
+
+  it("skipLobby mutes inputs", () => {
+    mockConfig();
+
+    render(
+      <MemoryRouter
+        initialEntries={[
+          "/room/?skipLobby=true&widgetId=1234&parentUrl=www.parent.org",
+        ]}
+      >
+        <MediaDevicesContext value={mockMediaDevices()}>
+          <TestComponent />
+        </MediaDevicesContext>
+      </MemoryRouter>,
+    );
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("false");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("false");
+  });
+
+  it("remembers previous state when devices disappear and reappear", async () => {
+    const user = userEvent.setup();
+    mockConfig();
+    const noDevices = mockMediaDevices({ microphone: false, camera: false });
+    // Warm up these Observables before making further changes to the
+    // createMediaDevicesObserver mock
+    noDevices.audioInput.available$.subscribe(() => {}).unsubscribe();
+    noDevices.videoInput.available$.subscribe(() => {}).unsubscribe();
+    const someDevices = mockMediaDevices();
+
+    const ReappearanceTest: FC = () => {
+      const [devices, setDevices] = useState(someDevices);
+      const onConnectDevicesClick = useCallback(
+        () => setDevices(someDevices),
+        [],
+      );
+      const onDisconnectDevicesClick = useCallback(
+        () => setDevices(noDevices),
+        [],
+      );
+
+      return (
+        <MemoryRouter>
+          <MediaDevicesContext value={devices}>
+            <TestComponent />
+            <button onClick={onConnectDevicesClick}>Connect devices</button>
+            <button onClick={onDisconnectDevicesClick}>
+              Disconnect devices
+            </button>
+          </MediaDevicesContext>
+        </MemoryRouter>
+      );
+    };
+
+    render(<ReappearanceTest />);
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("true");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("true");
+    await user.click(screen.getByRole("button", { name: "Toggle audio" }));
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("false");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("true");
+    await user.click(
+      screen.getByRole("button", { name: "Disconnect devices" }),
+    );
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("false");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("false");
+    await user.click(screen.getByRole("button", { name: "Connect devices" }));
+    // Audio should remember that it was muted, while video should re-enable
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("false");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("true");
+  });
+});
+
+describe("useMuteStates in VITE_PACKAGE='embedded' (widget) mode", () => {
+  beforeEach(() => {
+    vi.stubEnv("VITE_PACKAGE", "embedded");
+  });
+
+  it("uses defaults from config", () => {
+    mockConfig({
+      media_devices: {
+        enable_audio: false,
+        enable_video: false,
+      },
+    });
+
+    render(
+      <MemoryRouter>
+        <MediaDevicesContext value={mockMediaDevices()}>
+          <TestComponent />
+        </MediaDevicesContext>
+      </MemoryRouter>,
+    );
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("false");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("false");
+  });
+
+  it("skipLobby does not mute inputs", () => {
+    mockConfig();
+
+    render(
+      <MemoryRouter
+        initialEntries={[
+          "/room/?skipLobby=true&widgetId=1234&parentUrl=www.parent.org",
+        ]}
+      >
+        <MediaDevicesContext value={mockMediaDevices()}>
+          <TestComponent />
+        </MediaDevicesContext>
+      </MemoryRouter>,
+    );
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("true");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("true");
+  });
+
+  it("url params win over config", () => {
+    // The config sets audio and video to disabled
+    mockConfig({ media_devices: { enable_audio: false, enable_video: false } });
+
+    render(
+      <MemoryRouter
+        initialEntries={[
+          // The Intent sets both audio and video enabled to true via the url param configuration
+          "/room/?intent=start_call_dm&widgetId=1234&parentUrl=www.parent.org",
+        ]}
+      >
+        <MediaDevicesContext value={mockMediaDevices()}>
+          <TestComponent />
+        </MediaDevicesContext>
+      </MemoryRouter>,
+    );
+    // At the end we expect the url param to take precedence, resulting in true
+    expect(screen.getByTestId("audio-enabled").textContent).toBe("true");
+    expect(screen.getByTestId("video-enabled").textContent).toBe("true");
+  });
+});

src/room/MuteStates.ts

@@ -0,0 +1,178 @@
+/*
+Copyright 2023, 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import {
+  type Dispatch,
+  type SetStateAction,
+  useCallback,
+  useEffect,
+  useMemo,
+} from "react";
+import { type IWidgetApiRequest } from "matrix-widget-api";
+import { logger } from "matrix-js-sdk/lib/logger";
+import { useObservableEagerState } from "observable-hooks";
+
+import {
+  type DeviceLabel,
+  type SelectedDevice,
+  type MediaDevice,
+} from "../state/MediaDevices";
+import { useIsEarpiece, useMediaDevices } from "../MediaDevicesContext";
+import { useReactiveState } from "../useReactiveState";
+import { ElementWidgetActions, widget } from "../widget";
+import { Config } from "../config/Config";
+import { useUrlParams } from "../UrlParams";
+
+/**
+ * If there already are this many participants in the call, we automatically mute
+ * the user.
+ */
+export const MUTE_PARTICIPANT_COUNT = 8;
+
+interface DeviceAvailable {
+  enabled: boolean;
+  setEnabled: Dispatch<SetStateAction<boolean>>;
+}
+
+interface DeviceUnavailable {
+  enabled: false;
+  setEnabled: null;
+}
+
+const deviceUnavailable: DeviceUnavailable = {
+  enabled: false,
+  setEnabled: null,
+};
+
+type MuteState = DeviceAvailable | DeviceUnavailable;
+
+export interface MuteStates {
+  audio: MuteState;
+  video: MuteState;
+}
+
+function useMuteState(
+  device: MediaDevice<DeviceLabel, SelectedDevice>,
+  enabledByDefault: () => boolean,
+  forceUnavailable: boolean = false,
+): MuteState {
+  const available = useObservableEagerState(device.available$);
+  const [enabled, setEnabled] = useReactiveState<boolean | undefined>(
+    // Determine the default value once devices are actually connected
+    (prev) => prev ?? (available.size > 0 ? enabledByDefault() : undefined),
+    [available.size],
+  );
+  return useMemo(
+    () =>
+      available.size === 0 || forceUnavailable
+        ? deviceUnavailable
+        : {
+            enabled: enabled ?? false,
+            setEnabled: setEnabled as Dispatch<SetStateAction<boolean>>,
+          },
+    [available.size, enabled, forceUnavailable, setEnabled],
+  );
+}
+
+export function useMuteStates(isJoined: boolean): MuteStates {
+  const devices = useMediaDevices();
+
+  const { skipLobby, defaultAudioEnabled, defaultVideoEnabled } =
+    useUrlParams();
+
+  const audio = useMuteState(
+    devices.audioInput,
+    () =>
+      (defaultAudioEnabled ?? Config.get().media_devices.enable_audio) &&
+      allowJoinUnmuted(skipLobby, isJoined),
+  );
+  useEffect(() => {
+    // If audio is enabled, we need to request the device names again,
+    // because iOS will not be able to switch to the correct device after un-muting.
+    // This is one of the main changes that makes iOS work with bluetooth audio devices.
+    if (audio.enabled) {
+      devices.requestDeviceNames();
+    }
+  }, [audio.enabled, devices]);
+  const isEarpiece = useIsEarpiece();
+  const video = useMuteState(
+    devices.videoInput,
+    () =>
+      (defaultVideoEnabled ?? Config.get().media_devices.enable_video) &&
+      allowJoinUnmuted(skipLobby, isJoined),
+    isEarpiece, // Force video to be unavailable if using earpiece
+  );
+
+  useEffect(() => {
+    widget?.api.transport
+      .send(ElementWidgetActions.DeviceMute, {
+        audio_enabled: audio.enabled,
+        video_enabled: video.enabled,
+      })
+      .catch((e) =>
+        logger.warn("Could not send DeviceMute action to widget", e),
+      );
+  }, [audio, video]);
+
+  const onMuteStateChangeRequest = useCallback(
+    (ev: CustomEvent<IWidgetApiRequest>) => {
+      // First copy the current state into our new state.
+      const newState = {
+        audio_enabled: audio.enabled,
+        video_enabled: video.enabled,
+      };
+      // Update new state if there are any requested changes from the widget action
+      // in `ev.detail.data`.
+      if (
+        ev.detail.data.audio_enabled != null &&
+        typeof ev.detail.data.audio_enabled === "boolean"
+      ) {
+        audio.setEnabled?.(ev.detail.data.audio_enabled);
+        newState.audio_enabled = ev.detail.data.audio_enabled;
+      }
+      if (
+        ev.detail.data.video_enabled != null &&
+        typeof ev.detail.data.video_enabled === "boolean"
+      ) {
+        video.setEnabled?.(ev.detail.data.video_enabled);
+        newState.video_enabled = ev.detail.data.video_enabled;
+      }
+      // Always reply with the new (now "current") state.
+      // This allows to also use this action to just get the unaltered current state
+      // by using a fromWidget request with: `ev.detail.data = {}`
+      widget!.api.transport.reply(ev.detail, newState);
+    },
+    [audio, video],
+  );
+  useEffect(() => {
+    // We setup a event listener for the widget action ElementWidgetActions.DeviceMute.
+    if (widget) {
+      // only setup the listener in widget mode
+
+      widget.lazyActions.on(
+        ElementWidgetActions.DeviceMute,
+        onMuteStateChangeRequest,
+      );
+
+      return (): void => {
+        // return a call to `off` so that we always clean up our listener.
+        widget?.lazyActions.off(
+          ElementWidgetActions.DeviceMute,
+          onMuteStateChangeRequest,
+        );
+      };
+    }
+  }, [onMuteStateChangeRequest]);
+
+  return useMemo(() => ({ audio, video }), [audio, video]);
+}
+
+function allowJoinUnmuted(skipLobby: boolean, isJoined: boolean): boolean {
+  return (
+    (!skipLobby && !isJoined) || import.meta.env.VITE_PACKAGE === "embedded"
+  );
+}

src/room/ReactionAudioRenderer.test.tsx

@@ -10,9 +10,8 @@ import {
   afterAll,
   afterEach,
   beforeEach,
-  describe,
   expect,
-  it,
+  test,
   vitest,
   type MockedFunction,
   type Mock,
@@ -28,7 +27,7 @@ import {
 import { useAudioContext } from "../useAudioContext";
 import { GenericReaction, ReactionSet } from "../reactions";
 import { prefetchSounds } from "../soundUtils";
-import { type CallViewModel } from "../state/CallViewModel/CallViewModel";
+import { type CallViewModel } from "../state/CallViewModel";
 import { getBasicCallViewModelEnvironment } from "../utils/test-viewmodel";
 import {
   alice,
@@ -46,129 +45,125 @@ function TestComponent({ vm }: { vm: CallViewModel }): ReactNode {
   );
 }
 
-vitest.mock("livekit-client/e2ee-worker?worker");
 vitest.mock("../useAudioContext");
 vitest.mock("../soundUtils");
 
+afterEach(() => {
+  vitest.resetAllMocks();
+  playReactionsSoundSetting.setValue(playReactionsSoundSetting.defaultValue);
+  soundEffectVolumeSetting.setValue(soundEffectVolumeSetting.defaultValue);
+});
+
+afterAll(() => {
+  vitest.restoreAllMocks();
+});
+
 let playSound: Mock<
   NonNullable<ReturnType<typeof useAudioContext>>["playSound"]
 >;
 
-describe("ReactionAudioRenderer", () => {
-  afterEach(() => {
-    playReactionsSoundSetting.setValue(playReactionsSoundSetting.defaultValue);
-    soundEffectVolumeSetting.setValue(soundEffectVolumeSetting.defaultValue);
+beforeEach(() => {
+  (prefetchSounds as MockedFunction<typeof prefetchSounds>).mockResolvedValue({
+    sound: new ArrayBuffer(0),
   });
-  beforeEach(() => {
-    (prefetchSounds as MockedFunction<typeof prefetchSounds>).mockResolvedValue(
-      {
-        sound: new ArrayBuffer(0),
-      },
-    );
-    playSound = vitest.fn();
-    (useAudioContext as MockedFunction<typeof useAudioContext>).mockReturnValue(
-      {
-        playSound,
-        playSoundLooping: vitest.fn(),
-        soundDuration: {},
-      },
-    );
-  });
-  afterAll(() => {
-    vitest.restoreAllMocks();
-  });
-
-  it("preloads all audio elements", () => {
-    const { vm } = getBasicCallViewModelEnvironment([local, alice]);
-    playReactionsSoundSetting.setValue(true);
-    render(<TestComponent vm={vm} />);
-    expect(prefetchSounds).toHaveBeenCalledOnce();
-  });
-
-  it("will play an audio sound when there is a reaction", () => {
-    const { vm, reactionsSubject$ } = getBasicCallViewModelEnvironment([
-      local,
-      alice,
-    ]);
-    playReactionsSoundSetting.setValue(true);
-    render(<TestComponent vm={vm} />);
-
-    // Find the first reaction with a sound effect
-    const chosenReaction = ReactionSet.find((r) => !!r.sound);
-    if (!chosenReaction) {
-      throw Error(
-        "No reactions have sounds configured, this test cannot succeed",
-      );
-    }
-    act(() => {
-      reactionsSubject$.next({
-        [aliceRtcMember.deviceId]: {
-          reactionOption: chosenReaction,
-          expireAfter: new Date(0),
-        },
-      });
-    });
-    expect(playSound).toHaveBeenCalledWith(chosenReaction.name);
-  });
-
-  it("will play the generic audio sound when there is soundless reaction", () => {
-    const { vm, reactionsSubject$ } = getBasicCallViewModelEnvironment([
-      local,
-      alice,
-    ]);
-    playReactionsSoundSetting.setValue(true);
-    render(<TestComponent vm={vm} />);
-
-    // Find the first reaction with a sound effect
-    const chosenReaction = ReactionSet.find((r) => !r.sound);
-    if (!chosenReaction) {
-      throw Error(
-        "No reactions have sounds configured, this test cannot succeed",
-      );
-    }
-    act(() => {
-      reactionsSubject$.next({
-        [aliceRtcMember.deviceId]: {
-          reactionOption: chosenReaction,
-          expireAfter: new Date(0),
-        },
-      });
-    });
-    expect(playSound).toHaveBeenCalledWith(GenericReaction.name);
-  });
-
-  it("will play multiple audio sounds when there are multiple different reactions", () => {
-    const { vm, reactionsSubject$ } = getBasicCallViewModelEnvironment([
-      local,
-      alice,
-    ]);
-    playReactionsSoundSetting.setValue(true);
-    render(<TestComponent vm={vm} />);
-
-    // Find the first reaction with a sound effect
-    const [reaction1, reaction2] = ReactionSet.filter((r) => !!r.sound);
-    if (!reaction1 || !reaction2) {
-      throw Error(
-        "No reactions have sounds configured, this test cannot succeed",
-      );
-    }
-    act(() => {
-      reactionsSubject$.next({
-        [aliceRtcMember.deviceId]: {
-          reactionOption: reaction1,
-          expireAfter: new Date(0),
-        },
-        [bobRtcMember.deviceId]: {
-          reactionOption: reaction2,
-          expireAfter: new Date(0),
-        },
-        [localRtcMember.deviceId]: {
-          reactionOption: reaction1,
-          expireAfter: new Date(0),
-        },
-      });
-    });
-    expect(playSound).toHaveBeenCalledWith(reaction1.name);
-    expect(playSound).toHaveBeenCalledWith(reaction2.name);
+  playSound = vitest.fn();
+  (useAudioContext as MockedFunction<typeof useAudioContext>).mockReturnValue({
+    playSound,
+    playSoundLooping: vitest.fn(),
+    soundDuration: {},
   });
 });
+
+test("preloads all audio elements", () => {
+  const { vm } = getBasicCallViewModelEnvironment([local, alice]);
+  playReactionsSoundSetting.setValue(true);
+  render(<TestComponent vm={vm} />);
+  expect(prefetchSounds).toHaveBeenCalledOnce();
+});
+
+test("will play an audio sound when there is a reaction", () => {
+  const { vm, reactionsSubject$ } = getBasicCallViewModelEnvironment([
+    local,
+    alice,
+  ]);
+  playReactionsSoundSetting.setValue(true);
+  render(<TestComponent vm={vm} />);
+
+  // Find the first reaction with a sound effect
+  const chosenReaction = ReactionSet.find((r) => !!r.sound);
+  if (!chosenReaction) {
+    throw Error(
+      "No reactions have sounds configured, this test cannot succeed",
+    );
+  }
+  act(() => {
+    reactionsSubject$.next({
+      [aliceRtcMember.deviceId]: {
+        reactionOption: chosenReaction,
+        expireAfter: new Date(0),
+      },
+    });
+  });
+  expect(playSound).toHaveBeenCalledWith(chosenReaction.name);
+});
+
+test("will play the generic audio sound when there is soundless reaction", () => {
+  const { vm, reactionsSubject$ } = getBasicCallViewModelEnvironment([
+    local,
+    alice,
+  ]);
+  playReactionsSoundSetting.setValue(true);
+  render(<TestComponent vm={vm} />);
+
+  // Find the first reaction with a sound effect
+  const chosenReaction = ReactionSet.find((r) => !r.sound);
+  if (!chosenReaction) {
+    throw Error(
+      "No reactions have sounds configured, this test cannot succeed",
+    );
+  }
+  act(() => {
+    reactionsSubject$.next({
+      [aliceRtcMember.deviceId]: {
+        reactionOption: chosenReaction,
+        expireAfter: new Date(0),
+      },
+    });
+  });
+  expect(playSound).toHaveBeenCalledWith(GenericReaction.name);
+});
+
+test("will play multiple audio sounds when there are multiple different reactions", () => {
+  const { vm, reactionsSubject$ } = getBasicCallViewModelEnvironment([
+    local,
+    alice,
+  ]);
+  playReactionsSoundSetting.setValue(true);
+  render(<TestComponent vm={vm} />);
+
+  // Find the first reaction with a sound effect
+  const [reaction1, reaction2] = ReactionSet.filter((r) => !!r.sound);
+  if (!reaction1 || !reaction2) {
+    throw Error(
+      "No reactions have sounds configured, this test cannot succeed",
+    );
+  }
+  act(() => {
+    reactionsSubject$.next({
+      [aliceRtcMember.deviceId]: {
+        reactionOption: reaction1,
+        expireAfter: new Date(0),
+      },
+      [bobRtcMember.deviceId]: {
+        reactionOption: reaction2,
+        expireAfter: new Date(0),
+      },
+      [localRtcMember.deviceId]: {
+        reactionOption: reaction1,
+        expireAfter: new Date(0),
+      },
+    });
+  });
+  expect(playSound).toHaveBeenCalledWith(reaction1.name);
+  expect(playSound).toHaveBeenCalledWith(reaction2.name);
+});

src/room/ReactionAudioRenderer.tsx

@@ -12,7 +12,7 @@ import { GenericReaction, ReactionSet } from "../reactions";
 import { useAudioContext } from "../useAudioContext";
 import { prefetchSounds } from "../soundUtils";
 import { useLatest } from "../useLatest";
-import { type CallViewModel } from "../state/CallViewModel/CallViewModel";
+import { type CallViewModel } from "../state/CallViewModel";
 
 const soundMap = Object.fromEntries([
   ...ReactionSet.filter((v) => v.sound !== undefined).map((v) => [

src/room/ReactionsOverlay.test.tsx

@@ -6,7 +6,7 @@ Please see LICENSE in the repository root for full details.
 */
 
 import { render } from "@testing-library/react";
-import { expect, test, afterEach, vi } from "vitest";
+import { expect, test, afterEach } from "vitest";
 import { act } from "react";
 
 import { showReactions } from "../settings/settings";
@@ -20,8 +20,6 @@ import {
 } from "../utils/test-fixtures";
 import { getBasicCallViewModelEnvironment } from "../utils/test-viewmodel";
 
-vi.mock("livekit-client/e2ee-worker?worker");
-
 afterEach(() => {
   showReactions.setValue(showReactions.defaultValue);
 });

src/room/ReactionsOverlay.tsx

@@ -8,7 +8,7 @@ Please see LICENSE in the repository root for full details.
 import { type ReactNode } from "react";
 
 import styles from "./ReactionsOverlay.module.css";
-import { type CallViewModel } from "../state/CallViewModel/CallViewModel";
+import { type CallViewModel } from "../state/CallViewModel";
 import { useBehavior } from "../useBehavior";
 
 export function ReactionsOverlay({ vm }: { vm: CallViewModel }): ReactNode {

src/room/RoomPage.tsx

@@ -20,8 +20,6 @@ import {
   CheckIcon,
   UnknownSolidIcon,
 } from "@vector-im/compound-design-tokens/assets/web/icons";
-import { useObservable } from "observable-hooks";
-import { map } from "rxjs";
 
 import { useClientLegacy } from "../ClientContext";
 import { ErrorPage, FullScreenView, LoadingPage } from "../FullScreenView";
@@ -37,13 +35,12 @@ import { CallTerminatedMessage, useLoadGroupCall } from "./useLoadGroupCall";
 import { LobbyView } from "./LobbyView";
 import { E2eeType } from "../e2ee/e2eeType";
 import { useProfile } from "../profile/useProfile";
+import { useMuteStates } from "./MuteStates";
 import { useOptInAnalytics } from "../settings/settings";
 import { Config } from "../config/Config";
 import { Link } from "../button/Link";
 import { ErrorView } from "../ErrorView";
-import { useMediaDevices } from "../MediaDevicesContext";
-import { MuteStates } from "../state/MuteStates";
-import { ObservableScope } from "../state/ObservableScope";
+import { useMatrixRTCSessionJoinState } from "../useMatrixRTCSessionJoinState";
 
 export const RoomPage: FC = () => {
   const { confineToRoom, appPrompt, preload, header, displayName, skipLobby } =
@@ -64,19 +61,10 @@ export const RoomPage: FC = () => {
   const { avatarUrl, displayName: userDisplayName } = useProfile(client);
 
   const groupCallState = useLoadGroupCall(client, roomIdOrAlias, viaServers);
-  const [joined, setJoined] = useState(false);
-
-  const devices = useMediaDevices();
-  const [muteStates, setMuteStates] = useState<MuteStates | null>(null);
-  const joined$ = useObservable(
-    (inputs$) => inputs$.pipe(map(([joined]) => joined)),
-    [joined],
+  const isJoined = useMatrixRTCSessionJoinState(
+    groupCallState.kind === "loaded" ? groupCallState.rtcSession : undefined,
   );
-  useEffect(() => {
-    const scope = new ObservableScope();
-    setMuteStates(new MuteStates(scope, devices, joined$));
-    return (): void => scope.end();
-  }, [devices, joined$]);
+  const muteStates = useMuteStates(isJoined);
 
   useEffect(() => {
     // If we've finished loading, are not already authed and we've been given a display name as
@@ -113,25 +101,22 @@ export const RoomPage: FC = () => {
     }
   }, [groupCallState.kind]);
 
-  const groupCallView = (): ReactNode => {
+  const groupCallView = (): JSX.Element => {
     switch (groupCallState.kind) {
       case "loaded":
         return (
-          muteStates && (
-            <GroupCallView
-              widget={widget}
-              client={client!}
-              rtcSession={groupCallState.rtcSession}
-              joined={joined}
-              setJoined={setJoined}
-              isPasswordlessUser={passwordlessUser}
-              confineToRoom={confineToRoom}
-              preload={preload}
-              skipLobby={skipLobby || wasInWaitForInviteState.current}
-              header={header}
-              muteStates={muteStates}
-            />
-          )
+          <GroupCallView
+            widget={widget}
+            client={client!}
+            rtcSession={groupCallState.rtcSession}
+            isJoined={isJoined}
+            isPasswordlessUser={passwordlessUser}
+            confineToRoom={confineToRoom}
+            preload={preload}
+            skipLobby={skipLobby || wasInWaitForInviteState.current}
+            header={header}
+            muteStates={muteStates}
+          />
         );
       case "waitForInvite":
       case "canKnock": {
@@ -150,35 +135,34 @@ export const RoomPage: FC = () => {
             </>
           );
         return (
-          muteStates && (
-            <LobbyView
-              client={client!}
-              matrixInfo={{
-                userId: client!.getUserId() ?? "",
-                displayName: userDisplayName ?? "",
-                avatarUrl: avatarUrl ?? "",
-                roomAlias: null,
-                roomId: groupCallState.roomSummary.room_id,
-                roomName: groupCallState.roomSummary.name ?? "",
-                roomAvatar: groupCallState.roomSummary.avatar_url ?? null,
-                e2eeSystem: {
-                  kind: groupCallState.roomSummary[
-                    "im.nheko.summary.encryption"
-                  ]
-                    ? E2eeType.PER_PARTICIPANT
-                    : E2eeType.NONE,
-                },
-              }}
-              onEnter={(): void => knock?.()}
-              enterLabel={label}
-              waitingForInvite={groupCallState.kind === "waitForInvite"}
-              confineToRoom={confineToRoom}
-              hideHeader={header !== "standard"}
-              participantCount={null}
-              muteStates={muteStates}
-              onShareClick={null}
-            />
-          )
+          <LobbyView
+            client={client!}
+            matrixInfo={{
+              userId: client!.getUserId() ?? "",
+              displayName: userDisplayName ?? "",
+              avatarUrl: avatarUrl ?? "",
+              roomAlias: null,
+              roomId: groupCallState.roomSummary.room_id,
+              roomName: groupCallState.roomSummary.name ?? "",
+              roomAvatar: groupCallState.roomSummary.avatar_url ?? null,
+              e2eeSystem: {
+                kind: groupCallState.roomSummary["im.nheko.summary.encryption"]
+                  ? E2eeType.PER_PARTICIPANT
+                  : E2eeType.NONE,
+              },
+            }}
+            onEnter={async (): Promise<void> => {
+              knock?.();
+              return Promise.resolve();
+            }}
+            enterLabel={label}
+            waitingForInvite={groupCallState.kind === "waitForInvite"}
+            confineToRoom={confineToRoom}
+            hideHeader={header !== "standard"}
+            participantCount={null}
+            muteStates={muteStates}
+            onShareClick={null}
+          />
         );
       }
       case "loading":

src/room/VideoPreview.test.tsx

@@ -5,12 +5,20 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE in the repository root for full details.
 */
 
-import { expect, describe, it, beforeAll } from "vitest";
+import { expect, describe, it, vi, beforeAll } from "vitest";
 import { render } from "@testing-library/react";
 
 import { type MatrixInfo, VideoPreview } from "./VideoPreview";
+import { type MuteStates } from "./MuteStates";
 import { E2eeType } from "../e2ee/e2eeType";
 
+function mockMuteStates({ audio = true, video = true } = {}): MuteStates {
+  return {
+    audio: { enabled: audio, setEnabled: vi.fn() },
+    video: { enabled: video, setEnabled: vi.fn() },
+  };
+}
+
 describe("VideoPreview", () => {
   const matrixInfo: MatrixInfo = {
     userId: "@a:example.org",
@@ -41,7 +49,7 @@ describe("VideoPreview", () => {
     const { queryByRole } = render(
       <VideoPreview
         matrixInfo={matrixInfo}
-        videoEnabled={false}
+        muteStates={mockMuteStates({ video: false })}
         videoTrack={null}
         children={<></>}
       />,
@@ -53,7 +61,7 @@ describe("VideoPreview", () => {
     const { queryByRole } = render(
       <VideoPreview
         matrixInfo={matrixInfo}
-        videoEnabled
+        muteStates={mockMuteStates({ video: true })}
         videoTrack={null}
         children={<></>}
       />,

src/room/VideoPreview.tsx

@@ -13,6 +13,7 @@ import { useTranslation } from "react-i18next";
 
 import { TileAvatar } from "../tile/TileAvatar";
 import styles from "./VideoPreview.module.css";
+import { type MuteStates } from "./MuteStates";
 import { type EncryptionSystem } from "../e2ee/sharedKeyManagement";
 
 export type MatrixInfo = {
@@ -28,14 +29,14 @@ export type MatrixInfo = {
 
 interface Props {
   matrixInfo: MatrixInfo;
-  videoEnabled: boolean;
+  muteStates: MuteStates;
   videoTrack: LocalVideoTrack | null;
   children: ReactNode;
 }
 
 export const VideoPreview: FC<Props> = ({
   matrixInfo,
-  videoEnabled,
+  muteStates,
   videoTrack,
   children,
 }) => {
@@ -55,8 +56,8 @@ export const VideoPreview: FC<Props> = ({
   }, [videoTrack]);
 
   const cameraIsStarting = useMemo(
-    () => videoEnabled && !videoTrack,
-    [videoEnabled, videoTrack],
+    () => muteStates.video.enabled && !videoTrack,
+    [muteStates.video.enabled, videoTrack],
   );
 
   return (
@@ -75,7 +76,7 @@ export const VideoPreview: FC<Props> = ({
         tabIndex={-1}
         disablePictureInPicture
       />
-      {(!videoEnabled || cameraIsStarting) && (
+      {(!muteStates.video.enabled || cameraIsStarting) && (
         <>
           <div className={styles.avatarContainer}>
             {cameraIsStarting && (

src/room/__snapshots__/GroupCallErrorBoundary.test.tsx.snap

@@ -292,7 +292,7 @@ exports[`should have a close button in widget mode 1`] = `
             Call is not supported
           </h1>
           <p>
-            The server is not configured to work with Element Call. Please contact your server admin (Domain: example.com, Error Code: MISSING_MATRIX_RTC_TRANSPORT).
+            The server is not configured to work with Element Call. Please contact your server admin (Domain: example.com, Error Code: MISSING_MATRIX_RTC_FOCUS).
           </p>
           <button
             class="_button_vczzf_8"
@@ -445,7 +445,7 @@ exports[`should render the error page with link back to home 1`] = `
             Call is not supported
           </h1>
           <p>
-            The server is not configured to work with Element Call. Please contact your server admin (Domain: example.com, Error Code: MISSING_MATRIX_RTC_TRANSPORT).
+            The server is not configured to work with Element Call. Please contact your server admin (Domain: example.com, Error Code: MISSING_MATRIX_RTC_FOCUS).
           </p>
           <button
             class="_button_vczzf_8 homeLink"
@@ -598,7 +598,7 @@ exports[`should report correct error for 'Call is not supported' 1`] = `
             Call is not supported
           </h1>
           <p>
-            The server is not configured to work with Element Call. Please contact your server admin (Domain: example.com, Error Code: MISSING_MATRIX_RTC_TRANSPORT).
+            The server is not configured to work with Element Call. Please contact your server admin (Domain: example.com, Error Code: MISSING_MATRIX_RTC_FOCUS).
           </p>
           <button
             class="_button_vczzf_8 homeLink"

src/room/__snapshots__/InCallView.test.tsx.snap

@@ -83,6 +83,9 @@ exports[`InCallView > rendering > renders 1`] = `
         class="nav rightNav"
       />
     </header>
+    <div>
+      mocked: MatrixAudioRenderer
+    </div>
     <div
       class="scrollingGrid grid"
     >
@@ -285,7 +288,7 @@ exports[`InCallView > rendering > renders 1`] = `
         class="buttons"
       >
         <button
-          aria-disabled="true"
+          aria-disabled="false"
           aria-labelledby="«r8»"
           class="_button_vczzf_8 _has-icon_vczzf_57 _icon-only_vczzf_50"
           data-kind="primary"
@@ -308,7 +311,7 @@ exports[`InCallView > rendering > renders 1`] = `
           </svg>
         </button>
         <button
-          aria-disabled="true"
+          aria-disabled="false"
           aria-labelledby="«rd»"
           class="_button_vczzf_8 _has-icon_vczzf_57 _icon-only_vczzf_50"
           data-kind="primary"

src/room/checkForParallelCalls.test.ts

@@ -0,0 +1,155 @@
+/*
+Copyright 2023, 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { vi, type Mocked, test, expect } from "vitest";
+import { type RoomState } from "matrix-js-sdk";
+
+import { PosthogAnalytics } from "../../src/analytics/PosthogAnalytics";
+import { checkForParallelCalls } from "../../src/room/checkForParallelCalls";
+import { withFakeTimers } from "../utils/test";
+
+const withMockedPosthog = (
+  continuation: (posthog: Mocked<PosthogAnalytics>) => void,
+): void => {
+  const posthog = vi.mocked({
+    trackEvent: vi.fn(),
+  } as unknown as PosthogAnalytics);
+  const instanceSpy = vi
+    .spyOn(PosthogAnalytics, "instance", "get")
+    .mockReturnValue(posthog);
+  try {
+    continuation(posthog);
+  } finally {
+    instanceSpy.mockRestore();
+  }
+};
+
+const mockRoomState = (
+  groupCallMemberContents: Record<string, unknown>[],
+): RoomState => {
+  const stateEvents = groupCallMemberContents.map((content) => ({
+    getContent: (): Record<string, unknown> => content,
+  }));
+  return { getStateEvents: () => stateEvents } as unknown as RoomState;
+};
+
+test("checkForParallelCalls does nothing if all participants are in the same call", () => {
+  withFakeTimers(() => {
+    withMockedPosthog((posthog) => {
+      const roomState = mockRoomState([
+        {
+          "m.calls": [
+            {
+              "m.call_id": "1",
+              "m.devices": [
+                {
+                  device_id: "Element Call",
+                  session_id: "a",
+                  expires_ts: Date.now() + 1000,
+                },
+              ],
+            },
+            {
+              "m.call_id": null, // invalid
+              "m.devices": [
+                {
+                  device_id: "Element Android",
+                  session_id: "a",
+                  expires_ts: Date.now() + 1000,
+                },
+              ],
+            },
+            null, // invalid
+          ],
+        },
+        {
+          "m.calls": [
+            {
+              "m.call_id": "1",
+              "m.devices": [
+                {
+                  device_id: "Element Desktop",
+                  session_id: "a",
+                  expires_ts: Date.now() + 1000,
+                },
+              ],
+            },
+          ],
+        },
+      ]);
+
+      checkForParallelCalls(roomState);
+      expect(posthog.trackEvent).not.toHaveBeenCalled();
+    });
+  });
+});
+
+test("checkForParallelCalls sends diagnostics to PostHog if there is a split-brain", () => {
+  withFakeTimers(() => {
+    withMockedPosthog((posthog) => {
+      const roomState = mockRoomState([
+        {
+          "m.calls": [
+            {
+              "m.call_id": "1",
+              "m.devices": [
+                {
+                  device_id: "Element Call",
+                  session_id: "a",
+                  expires_ts: Date.now() + 1000,
+                },
+              ],
+            },
+            {
+              "m.call_id": "2",
+              "m.devices": [
+                {
+                  device_id: "Element Android",
+                  session_id: "a",
+                  expires_ts: Date.now() + 1000,
+                },
+              ],
+            },
+          ],
+        },
+        {
+          "m.calls": [
+            {
+              "m.call_id": "1",
+              "m.devices": [
+                {
+                  device_id: "Element Desktop",
+                  session_id: "a",
+                  expires_ts: Date.now() + 1000,
+                },
+              ],
+            },
+            {
+              "m.call_id": "2",
+              "m.devices": [
+                {
+                  device_id: "Element Call",
+                  session_id: "a",
+                  expires_ts: Date.now() - 1000,
+                },
+              ],
+            },
+          ],
+        },
+      ]);
+
+      checkForParallelCalls(roomState);
+      expect(posthog.trackEvent).toHaveBeenCalledWith({
+        eventName: "ParallelCalls",
+        participantsPerCall: {
+          "1": 2,
+          "2": 1,
+        },
+      });
+    });
+  });
+});

src/room/checkForParallelCalls.ts

@@ -0,0 +1,55 @@
+/*
+Copyright 2023, 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { EventType, type RoomState } from "matrix-js-sdk";
+
+import { PosthogAnalytics } from "../analytics/PosthogAnalytics";
+
+function isObject(x: unknown): x is Record<string, unknown> {
+  return typeof x === "object" && x !== null;
+}
+
+/**
+ * Checks the state of a room for multiple calls happening in parallel, sending
+ * the details to PostHog if that is indeed what's happening. (This is unwanted
+ * as it indicates a split-brain scenario.)
+ */
+export function checkForParallelCalls(state: RoomState): void {
+  const now = Date.now();
+  const participantsPerCall = new Map<string, number>();
+
+  // For each participant in each call, increment the participant count
+  for (const e of state.getStateEvents(EventType.GroupCallMemberPrefix)) {
+    const content = e.getContent<Record<string, unknown>>();
+    const calls: unknown[] = Array.isArray(content["m.calls"])
+      ? content["m.calls"]
+      : [];
+
+    for (const call of calls) {
+      if (isObject(call) && typeof call["m.call_id"] === "string") {
+        const devices: unknown[] = Array.isArray(call["m.devices"])
+          ? call["m.devices"]
+          : [];
+
+        for (const device of devices) {
+          if (isObject(device) && (device["expires_ts"] as number) > now) {
+            const participantCount =
+              participantsPerCall.get(call["m.call_id"]) ?? 0;
+            participantsPerCall.set(call["m.call_id"], participantCount + 1);
+          }
+        }
+      }
+    }
+  }
+
+  if (participantsPerCall.size > 1) {
+    PosthogAnalytics.instance.trackEvent({
+      eventName: "ParallelCalls",
+      participantsPerCall: Object.fromEntries(participantsPerCall),
+    });
+  }
+}

src/room/useActiveFocus.ts

@@ -0,0 +1,45 @@
+/*
+Copyright 2023, 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import {
+  type MatrixRTCSession,
+  MatrixRTCSessionEvent,
+} from "matrix-js-sdk/lib/matrixrtc";
+import { useCallback, useRef } from "react";
+import { deepCompare } from "matrix-js-sdk/lib/utils";
+import { logger } from "matrix-js-sdk/lib/logger";
+import { type LivekitFocus, isLivekitFocus } from "matrix-js-sdk/lib/matrixrtc";
+
+import { useTypedEventEmitterState } from "../useEvents";
+
+/**
+ * Gets the currently active (livekit) focus for a MatrixRTC session
+ * This logic is specific to livekit foci where the whole call must use one
+ * and the same focus.
+ */
+export function useActiveLivekitFocus(
+  rtcSession: MatrixRTCSession,
+): LivekitFocus | undefined {
+  const prevActiveFocus = useRef<LivekitFocus | undefined>(undefined);
+  return useTypedEventEmitterState(
+    rtcSession,
+    MatrixRTCSessionEvent.MembershipsChanged,
+    useCallback(() => {
+      const f = rtcSession.getActiveFocus();
+      // Only handle foci with type="livekit" for now.
+      if (f && isLivekitFocus(f) && !deepCompare(f, prevActiveFocus.current)) {
+        const oldestMembership = rtcSession.getOldestMembership();
+        logger.info(
+          `Got new active focus from membership: ${oldestMembership?.sender}/${oldestMembership?.deviceId}.
+          Updated focus (focus switch) from ${JSON.stringify(prevActiveFocus.current)} to ${JSON.stringify(f)}`,
+        );
+        prevActiveFocus.current = f;
+      }
+      return prevActiveFocus.current;
+    }, [rtcSession]),
+  );
+}

src/room/useLoadGroupCall.ts

@@ -106,18 +106,22 @@ async function joinRoomAfterInvite(
 
 export class CallTerminatedMessage extends Error {
   /**
-   * Creates a new CallTerminatedMessage.
-   *
-   * @param icon The icon to display with the message
    * @param messageTitle The title of the call ended screen message (translated)
-   * @param messageBody The message explaining the kind of termination
-   * (kick, ban, knock reject, etc.) (translated)
-   * @param reason  The user-provided reason for the termination (kick/ban)
    */
   public constructor(
+    /**
+     * The icon to display with the message.
+     */
     public readonly icon: ComponentType<SVGAttributes<SVGElement>>,
     messageTitle: string,
+    /**
+     * The message explaining the kind of termination (kick, ban, knock reject,
+     * etc.) (translated)
+     */
     public readonly messageBody: string,
+    /**
+     * The user-provided reason for the termination (kick/ban)
+     */
     public readonly reason?: string,
   ) {
     super(messageTitle);

src/rtcSessionHelpers.test.ts

@@ -0,0 +1,218 @@
+/*
+Copyright 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { type MatrixRTCSession } from "matrix-js-sdk/lib/matrixrtc";
+import { expect, onTestFinished, test, vi } from "vitest";
+import { AutoDiscovery } from "matrix-js-sdk/lib/autodiscovery";
+import EventEmitter from "events";
+
+import { enterRTCSession, leaveRTCSession } from "../src/rtcSessionHelpers";
+import { mockConfig } from "./utils/test";
+import { ElementWidgetActions, widget } from "./widget";
+import { ErrorCode } from "./utils/errors.ts";
+
+const getUrlParams = vi.hoisted(() => vi.fn(() => ({})));
+vi.mock("./UrlParams", () => ({ getUrlParams }));
+
+const actualWidget = await vi.hoisted(async () => vi.importActual("./widget"));
+vi.mock("./widget", () => ({
+  ...actualWidget,
+  widget: {
+    api: {
+      setAlwaysOnScreen: (): void => {},
+      transport: { send: vi.fn(), reply: vi.fn(), stop: vi.fn() },
+    },
+    lazyActions: new EventEmitter(),
+  },
+}));
+
+test("It joins the correct Session", async () => {
+  const focusFromOlderMembership = {
+    type: "livekit",
+    livekit_service_url: "http://my-oldest-member-service-url.com",
+    livekit_alias: "my-oldest-member-service-alias",
+  };
+
+  const focusConfigFromWellKnown = {
+    type: "livekit",
+    livekit_service_url: "http://my-well-known-service-url.com",
+  };
+  const focusConfigFromWellKnown2 = {
+    type: "livekit",
+    livekit_service_url: "http://my-well-known-service-url2.com",
+  };
+  const clientWellKnown = {
+    "org.matrix.msc4143.rtc_foci": [
+      focusConfigFromWellKnown,
+      focusConfigFromWellKnown2,
+    ],
+  };
+
+  mockConfig({
+    livekit: { livekit_service_url: "http://my-default-service-url.com" },
+  });
+
+  vi.spyOn(AutoDiscovery, "getRawClientConfig").mockImplementation(
+    async (domain) => {
+      if (domain === "example.org") {
+        return Promise.resolve(clientWellKnown);
+      }
+      return Promise.resolve({});
+    },
+  );
+
+  const mockedSession = vi.mocked({
+    room: {
+      roomId: "roomId",
+      client: {
+        getDomain: vi.fn().mockReturnValue("example.org"),
+        getOpenIdToken: vi.fn().mockResolvedValue({
+          access_token: "ACCCESS_TOKEN",
+          token_type: "Bearer",
+          matrix_server_name: "localhost",
+          expires_in: 10000,
+        }),
+      },
+    },
+    memberships: [],
+    getFocusInUse: vi.fn().mockReturnValue(focusFromOlderMembership),
+    getOldestMembership: vi.fn().mockReturnValue({
+      getPreferredFoci: vi.fn().mockReturnValue([focusFromOlderMembership]),
+    }),
+    joinRoomSession: vi.fn(),
+  }) as unknown as MatrixRTCSession;
+  await enterRTCSession(mockedSession, false);
+
+  expect(mockedSession.joinRoomSession).toHaveBeenLastCalledWith(
+    [
+      {
+        livekit_alias: "my-oldest-member-service-alias",
+        livekit_service_url: "http://my-oldest-member-service-url.com",
+        type: "livekit",
+      },
+      {
+        livekit_alias: "roomId",
+        livekit_service_url: "http://my-well-known-service-url.com",
+        type: "livekit",
+      },
+      {
+        livekit_alias: "roomId",
+        livekit_service_url: "http://my-well-known-service-url2.com",
+        type: "livekit",
+      },
+      {
+        livekit_alias: "roomId",
+        livekit_service_url: "http://my-default-service-url.com",
+        type: "livekit",
+      },
+    ],
+    {
+      focus_selection: "oldest_membership",
+      type: "livekit",
+    },
+    {
+      manageMediaKeys: false,
+      useLegacyMemberEvents: false,
+      useNewMembershipManager: true,
+      useExperimentalToDeviceTransport: false,
+    },
+  );
+});
+
+async function testLeaveRTCSession(
+  cause: "user" | "error",
+  expectClose: boolean,
+): Promise<void> {
+  vi.clearAllMocks();
+  const session = { leaveRoomSession: vi.fn() } as unknown as MatrixRTCSession;
+  await leaveRTCSession(session, cause);
+  expect(session.leaveRoomSession).toHaveBeenCalled();
+  expect(widget!.api.transport.send).toHaveBeenCalledWith(
+    ElementWidgetActions.HangupCall,
+    expect.anything(),
+  );
+  if (expectClose) {
+    expect(widget!.api.transport.send).toHaveBeenCalledWith(
+      ElementWidgetActions.Close,
+      expect.anything(),
+    );
+    expect(widget!.api.transport.stop).toHaveBeenCalled();
+  } else {
+    expect(widget!.api.transport.send).not.toHaveBeenCalledWith(
+      ElementWidgetActions.Close,
+      expect.anything(),
+    );
+    expect(widget!.api.transport.stop).not.toHaveBeenCalled();
+  }
+}
+
+test("leaveRTCSession closes the widget on a normal hangup", async () => {
+  await testLeaveRTCSession("user", true);
+});
+
+test("leaveRTCSession doesn't close the widget on a fatal error", async () => {
+  await testLeaveRTCSession("error", false);
+});
+
+test("leaveRTCSession doesn't close the widget when returning to lobby", async () => {
+  getUrlParams.mockReturnValue({ returnToLobby: true });
+  onTestFinished(() => void getUrlParams.mockReset());
+  await testLeaveRTCSession("user", false);
+});
+
+test("It fails with configuration error if no live kit url config is set in fallback", async () => {
+  mockConfig({});
+  vi.spyOn(AutoDiscovery, "getRawClientConfig").mockResolvedValue({});
+
+  const mockedSession = vi.mocked({
+    room: {
+      roomId: "roomId",
+      client: {
+        getDomain: vi.fn().mockReturnValue("example.org"),
+      },
+    },
+    memberships: [],
+    getFocusInUse: vi.fn(),
+    joinRoomSession: vi.fn(),
+  }) as unknown as MatrixRTCSession;
+
+  await expect(enterRTCSession(mockedSession, false)).rejects.toThrowError(
+    expect.objectContaining({ code: ErrorCode.MISSING_MATRIX_RTC_FOCUS }),
+  );
+});
+
+test("It should not fail with configuration error if homeserver config has livekit url but not fallback", async () => {
+  mockConfig({});
+  vi.spyOn(AutoDiscovery, "getRawClientConfig").mockResolvedValue({
+    "org.matrix.msc4143.rtc_foci": [
+      {
+        type: "livekit",
+        livekit_service_url: "http://my-well-known-service-url.com",
+      },
+    ],
+  });
+
+  const mockedSession = vi.mocked({
+    room: {
+      roomId: "roomId",
+      client: {
+        getDomain: vi.fn().mockReturnValue("example.org"),
+        getOpenIdToken: vi.fn().mockResolvedValue({
+          access_token: "ACCCESS_TOKEN",
+          token_type: "Bearer",
+          matrix_server_name: "localhost",
+          expires_in: 10000,
+        }),
+      },
+    },
+    memberships: [],
+    getFocusInUse: vi.fn(),
+    joinRoomSession: vi.fn(),
+  }) as unknown as MatrixRTCSession;
+
+  await enterRTCSession(mockedSession, false);
+});

src/rtcSessionHelpers.ts

@@ -0,0 +1,201 @@
+/*
+Copyright 2023, 2024 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import {
+  isLivekitFocus,
+  isLivekitFocusConfig,
+  type LivekitFocus,
+  type LivekitFocusActive,
+  type MatrixRTCSession,
+} from "matrix-js-sdk/lib/matrixrtc";
+import { logger } from "matrix-js-sdk/lib/logger";
+import { AutoDiscovery } from "matrix-js-sdk/lib/autodiscovery";
+
+import { PosthogAnalytics } from "./analytics/PosthogAnalytics";
+import { Config } from "./config/Config";
+import { ElementWidgetActions, widget, type WidgetHelpers } from "./widget";
+import { MatrixRTCFocusMissingError } from "./utils/errors";
+import { getUrlParams } from "./UrlParams";
+import { getSFUConfigWithOpenID } from "./livekit/openIDSFU.ts";
+
+const FOCI_WK_KEY = "org.matrix.msc4143.rtc_foci";
+
+export function makeActiveFocus(): LivekitFocusActive {
+  return {
+    type: "livekit",
+    focus_selection: "oldest_membership",
+  };
+}
+
+async function makePreferredLivekitFoci(
+  rtcSession: MatrixRTCSession,
+  livekitAlias: string,
+): Promise<LivekitFocus[]> {
+  logger.log("Start building foci_preferred list: ", rtcSession.room.roomId);
+
+  const preferredFoci: LivekitFocus[] = [];
+
+  // Make the Focus from the running rtc session the highest priority one
+  // This minimizes how often we need to switch foci during a call.
+  const focusInUse = rtcSession.getFocusInUse();
+  if (focusInUse && isLivekitFocus(focusInUse)) {
+    logger.log("Adding livekit focus from oldest member: ", focusInUse);
+    preferredFoci.push(focusInUse);
+  }
+
+  // Warm up the first focus we owned, to ensure livekit room is created before any state event sent.
+  let toWarmUp: LivekitFocus | undefined;
+
+  // Prioritize the .well-known/matrix/client, if available, over the configured SFU
+  const domain = rtcSession.room.client.getDomain();
+  if (domain) {
+    // we use AutoDiscovery instead of relying on the MatrixClient having already
+    // been fully configured and started
+    const wellKnownFoci = (await AutoDiscovery.getRawClientConfig(domain))?.[
+      FOCI_WK_KEY
+    ];
+    if (Array.isArray(wellKnownFoci)) {
+      const validWellKnownFoci = wellKnownFoci
+        .filter((f) => !!f)
+        .filter(isLivekitFocusConfig)
+        .map((wellKnownFocus) => {
+          logger.log("Adding livekit focus from well known: ", wellKnownFocus);
+          return { ...wellKnownFocus, livekit_alias: livekitAlias };
+        });
+      if (validWellKnownFoci.length > 0) {
+        toWarmUp = validWellKnownFoci[0];
+      }
+      preferredFoci.push(...validWellKnownFoci);
+    }
+  }
+
+  const urlFromConf = Config.get().livekit?.livekit_service_url;
+  if (urlFromConf) {
+    const focusFormConf: LivekitFocus = {
+      type: "livekit",
+      livekit_service_url: urlFromConf,
+      livekit_alias: livekitAlias,
+    };
+    toWarmUp = toWarmUp ?? focusFormConf;
+    logger.log("Adding livekit focus from config: ", focusFormConf);
+    preferredFoci.push(focusFormConf);
+  }
+
+  if (toWarmUp) {
+    // this will call the jwt/sfu/get endpoint to pre create the livekit room.
+    await getSFUConfigWithOpenID(rtcSession.room.client, toWarmUp);
+  }
+  if (preferredFoci.length === 0)
+    throw new MatrixRTCFocusMissingError(domain ?? "");
+  return Promise.resolve(preferredFoci);
+
+  // TODO: we want to do something like this:
+  //
+  // const focusOtherMembers = await focusFromOtherMembers(
+  //   rtcSession,
+  //   livekitAlias,
+  // );
+  // if (focusOtherMembers) preferredFoci.push(focusOtherMembers);
+}
+
+export async function enterRTCSession(
+  rtcSession: MatrixRTCSession,
+  encryptMedia: boolean,
+  useNewMembershipManager = true,
+  useExperimentalToDeviceTransport = false,
+): Promise<void> {
+  PosthogAnalytics.instance.eventCallEnded.cacheStartCall(new Date());
+  PosthogAnalytics.instance.eventCallStarted.track(rtcSession.room.roomId);
+
+  // This must be called before we start trying to join the call, as we need to
+  // have started tracking by the time calls start getting created.
+  // groupCallOTelMembership?.onJoinCall();
+
+  // right now we assume everything is a room-scoped call
+  const livekitAlias = rtcSession.room.roomId;
+  const { features, matrix_rtc_session: matrixRtcSessionConfig } = Config.get();
+  const useDeviceSessionMemberEvents =
+    features?.feature_use_device_session_member_events;
+  const { sendNotificationType: notificationType, callIntent } = getUrlParams();
+  rtcSession.joinRoomSession(
+    await makePreferredLivekitFoci(rtcSession, livekitAlias),
+    makeActiveFocus(),
+    {
+      notificationType,
+      callIntent,
+      useNewMembershipManager,
+      manageMediaKeys: encryptMedia,
+      ...(useDeviceSessionMemberEvents !== undefined && {
+        useLegacyMemberEvents: !useDeviceSessionMemberEvents,
+      }),
+      delayedLeaveEventRestartMs:
+        matrixRtcSessionConfig?.delayed_leave_event_restart_ms,
+      delayedLeaveEventDelayMs:
+        matrixRtcSessionConfig?.delayed_leave_event_delay_ms,
+      delayedLeaveEventRestartLocalTimeoutMs:
+        matrixRtcSessionConfig?.delayed_leave_event_restart_local_timeout_ms,
+      networkErrorRetryMs: matrixRtcSessionConfig?.network_error_retry_ms,
+      makeKeyDelay: matrixRtcSessionConfig?.wait_for_key_rotation_ms,
+      membershipEventExpiryMs:
+        matrixRtcSessionConfig?.membership_event_expiry_ms,
+      useExperimentalToDeviceTransport,
+    },
+  );
+  if (widget) {
+    try {
+      await widget.api.transport.send(ElementWidgetActions.JoinCall, {});
+    } catch (e) {
+      logger.error("Failed to send join action", e);
+    }
+  }
+}
+
+const widgetPostHangupProcedure = async (
+  widget: WidgetHelpers,
+  cause: "user" | "error",
+  promiseBeforeHangup?: Promise<unknown>,
+): Promise<void> => {
+  try {
+    await widget.api.setAlwaysOnScreen(false);
+  } catch (e) {
+    logger.error("Failed to set call widget `alwaysOnScreen` to false", e);
+  }
+
+  // Wait for any last bits before hanging up.
+  await promiseBeforeHangup;
+  // We send the hangup event after the memberships have been updated
+  // calling leaveRTCSession.
+  // We need to wait because this makes the client hosting this widget killing the IFrame.
+  try {
+    await widget.api.transport.send(ElementWidgetActions.HangupCall, {});
+  } catch (e) {
+    logger.error("Failed to send hangup action", e);
+  }
+  // On a normal user hangup we can shut down and close the widget. But if an
+  // error occurs we should keep the widget open until the user reads it.
+  if (cause === "user" && !getUrlParams().returnToLobby) {
+    try {
+      await widget.api.transport.send(ElementWidgetActions.Close, {});
+    } catch (e) {
+      logger.error("Failed to send close action", e);
+    }
+    widget.api.transport.stop();
+  }
+};
+
+export async function leaveRTCSession(
+  rtcSession: MatrixRTCSession,
+  cause: "user" | "error",
+  promiseBeforeHangup?: Promise<unknown>,
+): Promise<void> {
+  await rtcSession.leaveRoomSession();
+  if (widget) {
+    await widgetPostHangupProcedure(widget, cause, promiseBeforeHangup);
+  } else {
+    await promiseBeforeHangup;
+  }
+}

src/settings/DeveloperSettingsTab.test.tsx

@@ -1,95 +0,0 @@
-/*
-Copyright 2025 New Vector Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-import { describe, expect, it, vi } from "vitest";
-import { render, waitFor } from "@testing-library/react";
-
-import type { MatrixClient } from "matrix-js-sdk";
-import type { Room as LivekitRoom } from "livekit-client";
-import { DeveloperSettingsTab } from "./DeveloperSettingsTab";
-
-// Mock url params hook to avoid environment-dependent snapshot churn.
-vi.mock("../UrlParams", () => ({
-  useUrlParams: (): { mocked: boolean; answer: number } => ({
-    mocked: true,
-    answer: 42,
-  }),
-}));
-
-// Provide a minimal mock of a Livekit Room structure used by the component.
-function createMockLivekitRoom(
-  wsUrl: string,
-  serverInfo: object,
-  metadata: string,
-): { isLocal: boolean; url: string; room: LivekitRoom } {
-  const mockRoom = {
-    serverInfo,
-    metadata,
-    engine: { client: { ws: { url: wsUrl } } },
-  } as unknown as LivekitRoom;
-
-  return {
-    isLocal: true,
-    url: wsUrl,
-    room: mockRoom,
-  };
-}
-
-// Minimal MatrixClient mock with only the methods used by the component.
-function createMockMatrixClient(): MatrixClient {
-  return {
-    doesServerSupportUnstableFeature: vi.fn().mockResolvedValue(true), // ensure stickyEventsSupported eventually becomes true
-    getCrypto: (): { getVersion: () => string } | undefined => ({
-      getVersion: () => "crypto-1.0.0",
-    }),
-    getUserId: () => "@alice:example.org",
-    getDeviceId: () => "DEVICE123",
-  } as unknown as MatrixClient;
-}
-
-describe("DeveloperSettingsTab", () => {
-  it("renders and matches snapshot", async () => {
-    const client = createMockMatrixClient();
-
-    const livekitRooms: {
-      room: LivekitRoom;
-      url: string;
-      isLocal?: boolean;
-    }[] = [
-      createMockLivekitRoom(
-        "wss://local-sfu.example.org",
-        { region: "local", version: "1.2.3" },
-        "local-metadata",
-      ),
-      {
-        isLocal: false,
-        url: "wss://remote-sfu.example.org",
-        room: {
-          serverInfo: { region: "remote", version: "4.5.6" },
-          metadata: "remote-metadata",
-          engine: { client: { ws: { url: "wss://remote-sfu.example.org" } } },
-        } as unknown as LivekitRoom,
-      },
-    ];
-
-    const { container } = render(
-      <DeveloperSettingsTab
-        client={client}
-        livekitRooms={livekitRooms}
-        env={{ MY_MOCK_ENV: 10, ENV: "test" } as unknown as ImportMetaEnv}
-      />,
-    );
-
-    // Wait for the async sticky events feature check to resolve so the final UI
-    // (e.g. enabled Matrix_2_0 radio button) appears deterministically.
-    await waitFor(() =>
-      expect(client.doesServerSupportUnstableFeature).toHaveBeenCalled(),
-    );
-
-    expect(container).toMatchSnapshot();
-  });
-});

src/settings/DeveloperSettingsTab.tsx

@@ -5,116 +5,69 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE in the repository root for full details.
 */
 
-import {
-  type ChangeEvent,
-  type FC,
-  useCallback,
-  useEffect,
-  useMemo,
-  useId,
-  useState,
-} from "react";
+import { type ChangeEvent, type FC, useCallback, useMemo } from "react";
 import { useTranslation } from "react-i18next";
-import {
-  UNSTABLE_MSC4354_STICKY_EVENTS,
-  type MatrixClient,
-} from "matrix-js-sdk";
-import { logger } from "matrix-js-sdk/lib/logger";
-import {
-  EditInPlace,
-  Root as Form,
-  Heading,
-  HelpMessage,
-  InlineField,
-  Label,
-  RadioControl,
-} from "@vector-im/compound-web";
 
 import { FieldRow, InputField } from "../input/Input";
 import {
   useSetting,
   duplicateTiles as duplicateTilesSetting,
   debugTileLayout as debugTileLayoutSetting,
+  showNonMemberTiles as showNonMemberTilesSetting,
   showConnectionStats as showConnectionStatsSetting,
+  useNewMembershipManager as useNewMembershipManagerSetting,
+  useExperimentalToDeviceTransport as useExperimentalToDeviceTransportSetting,
   muteAllAudio as muteAllAudioSetting,
   alwaysShowIphoneEarpiece as alwaysShowIphoneEarpieceSetting,
-  matrixRTCMode as matrixRTCModeSetting,
-  customLivekitUrl as customLivekitUrlSetting,
-  MatrixRTCMode,
 } from "./settings";
+import type { MatrixClient } from "matrix-js-sdk";
 import type { Room as LivekitRoom } from "livekit-client";
 import styles from "./DeveloperSettingsTab.module.css";
 import { useUrlParams } from "../UrlParams";
-
 interface Props {
   client: MatrixClient;
-  livekitRooms?: { room: LivekitRoom; url: string; isLocal?: boolean }[];
-  env: ImportMetaEnv;
+  livekitRoom?: LivekitRoom;
 }
 
-export const DeveloperSettingsTab: FC<Props> = ({
-  client,
-  livekitRooms,
-  env,
-}) => {
+export const DeveloperSettingsTab: FC<Props> = ({ client, livekitRoom }) => {
   const { t } = useTranslation();
   const [duplicateTiles, setDuplicateTiles] = useSetting(duplicateTilesSetting);
   const [debugTileLayout, setDebugTileLayout] = useSetting(
     debugTileLayoutSetting,
   );
-
-  const [stickyEventsSupported, setStickyEventsSupported] = useState(false);
-  useEffect(() => {
-    client
-      .doesServerSupportUnstableFeature(UNSTABLE_MSC4354_STICKY_EVENTS)
-      .then((result) => {
-        setStickyEventsSupported(result);
-      })
-      .catch((ex) => {
-        logger.warn("Failed to check if sticky events are supported", ex);
-      });
-  }, [client]);
-
-  const [matrixRTCMode, setMatrixRTCMode] = useSetting(matrixRTCModeSetting);
-  const matrixRTCModeRadioGroup = useId();
-  const onMatrixRTCModeChange = useCallback(
-    (e: ChangeEvent<HTMLInputElement>) => {
-      setMatrixRTCMode(e.target.value as MatrixRTCMode);
-    },
-    [setMatrixRTCMode],
+  const [showNonMemberTiles, setShowNonMemberTiles] = useSetting(
+    showNonMemberTilesSetting,
   );
 
   const [showConnectionStats, setShowConnectionStats] = useSetting(
     showConnectionStatsSetting,
   );
 
+  const [useNewMembershipManager, setNewMembershipManager] = useSetting(
+    useNewMembershipManagerSetting,
+  );
+
   const [alwaysShowIphoneEarpiece, setAlwaysShowIphoneEarpiece] = useSetting(
     alwaysShowIphoneEarpieceSetting,
   );
-
-  const [customLivekitUrl, setCustomLivekitUrl] = useSetting(
-    customLivekitUrlSetting,
-  );
-  const [customLivekitUrlTextBuffer, setCustomLivekitUrlTextBuffer] =
-    useState(customLivekitUrl);
-  useEffect(() => {
-    setCustomLivekitUrlTextBuffer(customLivekitUrl);
-  }, [customLivekitUrl]);
+  const [
+    useExperimentalToDeviceTransport,
+    setUseExperimentalToDeviceTransport,
+  ] = useSetting(useExperimentalToDeviceTransportSetting);
 
   const [muteAllAudio, setMuteAllAudio] = useSetting(muteAllAudioSetting);
 
   const urlParams = useUrlParams();
 
-  const localSfuUrl = useMemo((): URL | null => {
-    const localRoom = livekitRooms?.find((r) => r.isLocal)?.room;
-    if (localRoom?.engine.client.ws?.url) {
+  const sfuUrl = useMemo((): URL | null => {
+    if (livekitRoom?.engine.client.ws?.url) {
       // strip the URL params
-      const url = new URL(localRoom.engine.client.ws.url);
+      const url = new URL(livekitRoom.engine.client.ws.url);
       url.search = "";
       return url;
     }
     return null;
-  }, [livekitRooms]);
+  }, [livekitRoom]);
 
   return (
     <>
@@ -174,6 +127,20 @@ export const DeveloperSettingsTab: FC<Props> = ({
           }
         />
       </FieldRow>
+      <FieldRow>
+        <InputField
+          id="showNonMemberTiles"
+          type="checkbox"
+          label={t("developer_mode.show_non_member_tiles")}
+          checked={!!showNonMemberTiles}
+          onChange={useCallback(
+            (event: ChangeEvent<HTMLInputElement>): void => {
+              setShowNonMemberTiles(event.target.checked);
+            },
+            [setShowNonMemberTiles],
+          )}
+        />
+      </FieldRow>
       <FieldRow>
         <InputField
           id="showConnectionStats"
@@ -188,6 +155,34 @@ export const DeveloperSettingsTab: FC<Props> = ({
           )}
         />
       </FieldRow>
+      <FieldRow>
+        <InputField
+          id="useNewMembershipManager"
+          type="checkbox"
+          label={t("developer_mode.use_new_membership_manager")}
+          checked={!!useNewMembershipManager}
+          onChange={useCallback(
+            (event: ChangeEvent<HTMLInputElement>): void => {
+              setNewMembershipManager(event.target.checked);
+            },
+            [setNewMembershipManager],
+          )}
+        />
+      </FieldRow>
+      <FieldRow>
+        <InputField
+          id="useToDeviceKeyTransport"
+          type="checkbox"
+          label={t("developer_mode.use_to_device_key_transport")}
+          checked={!!useExperimentalToDeviceTransport}
+          onChange={useCallback(
+            (event: ChangeEvent<HTMLInputElement>): void => {
+              setUseExperimentalToDeviceTransport(event.target.checked);
+            },
+            [setUseExperimentalToDeviceTransport],
+          )}
+        />
+      </FieldRow>
       <FieldRow>
         <InputField
           id="muteAllAudio"
@@ -216,115 +211,24 @@ export const DeveloperSettingsTab: FC<Props> = ({
           )}
         />{" "}
       </FieldRow>
-      <EditInPlace
-        onSubmit={(e) => e.preventDefault()}
-        helpLabel={
-          customLivekitUrl === null
-            ? t("developer_mode.custom_livekit_url.from_config")
-            : t("developer_mode.custom_livekit_url.current_url") +
-              customLivekitUrl
-        }
-        label={t("developer_mode.custom_livekit_url.label")}
-        saveButtonLabel={t("developer_mode.custom_livekit_url.save")}
-        savingLabel={t("developer_mode.custom_livekit_url.saving")}
-        cancelButtonLabel={t("developer_mode.custom_livekit_url.reset")}
-        onSave={useCallback(
-          (e: React.FormEvent<HTMLFormElement>) => {
-            setCustomLivekitUrl(
-              customLivekitUrlTextBuffer === ""
-                ? null
-                : customLivekitUrlTextBuffer,
-            );
-          },
-          [setCustomLivekitUrl, customLivekitUrlTextBuffer],
-        )}
-        value={customLivekitUrlTextBuffer ?? ""}
-        onChange={useCallback(
-          (event: ChangeEvent<HTMLInputElement>): void => {
-            setCustomLivekitUrlTextBuffer(event.target.value);
-          },
-          [setCustomLivekitUrlTextBuffer],
-        )}
-        onCancel={useCallback(
-          (e: React.FormEvent<HTMLFormElement>) => {
-            setCustomLivekitUrl(null);
-          },
-          [setCustomLivekitUrl],
-        )}
-      />
-      <Heading as="h3" type="body" weight="semibold" size="lg">
-        {t("developer_mode.matrixRTCMode.title")}
-      </Heading>
-      <Form>
-        <InlineField
-          name={matrixRTCModeRadioGroup}
-          control={
-            <RadioControl
-              checked={matrixRTCMode === MatrixRTCMode.Legacy}
-              value={MatrixRTCMode.Legacy}
-              onChange={onMatrixRTCModeChange}
-            />
-          }
-        >
-          <Label>{t("developer_mode.matrixRTCMode.Legacy.label")}</Label>
-          <HelpMessage>
-            {t("developer_mode.matrixRTCMode.Legacy.description")}
-          </HelpMessage>
-        </InlineField>
-        <InlineField
-          name={matrixRTCModeRadioGroup}
-          control={
-            <RadioControl
-              checked={matrixRTCMode === MatrixRTCMode.Compatibil}
-              value={MatrixRTCMode.Compatibil}
-              onChange={onMatrixRTCModeChange}
-            />
-          }
-        >
-          <Label>{t("developer_mode.matrixRTCMode.Comptibility.label")}</Label>
-          <HelpMessage>
-            {t("developer_mode.matrixRTCMode.Comptibility.description")}
-          </HelpMessage>
-        </InlineField>
-        <InlineField
-          name={matrixRTCModeRadioGroup}
-          control={
-            <RadioControl
-              checked={matrixRTCMode === MatrixRTCMode.Matrix_2_0}
-              value={MatrixRTCMode.Matrix_2_0}
-              disabled={!stickyEventsSupported}
-              onChange={onMatrixRTCModeChange}
-            />
-          }
-        >
-          <Label>{t("developer_mode.matrixRTCMode.Matrix_2_0.label")}</Label>
-          <HelpMessage>
-            {t("developer_mode.matrixRTCMode.Matrix_2_0.description")}
-          </HelpMessage>
-        </InlineField>
-      </Form>
-      {livekitRooms?.map((livekitRoom) => (
+      {livekitRoom ? (
         <>
-          <h3>
-            {t("developer_mode.livekit_sfu", {
-              url: livekitRoom.url || "unknown",
-            })}
-          </h3>
-          {livekitRoom.isLocal && <p>ws-url: {localSfuUrl?.href}</p>}
           <p>
-            {t("developer_mode.livekit_server_info")}(
-            {livekitRoom.isLocal ? "local" : "remote"})
+            {t("developer_mode.livekit_sfu", {
+              url: sfuUrl?.href || "unknown",
+            })}
           </p>
+          <p>{t("developer_mode.livekit_server_info")}</p>
           <pre className={styles.pre}>
-            {livekitRoom.room.serverInfo
-              ? JSON.stringify(livekitRoom.room.serverInfo, null, 2)
+            {livekitRoom.serverInfo
+              ? JSON.stringify(livekitRoom.serverInfo, null, 2)
               : "undefined"}
-            {livekitRoom.room.metadata}
+            {livekitRoom.metadata}
           </pre>
         </>
-      ))}
+      ) : null}
       <p>{t("developer_mode.environment_variables")}</p>
-      <pre>{JSON.stringify(env, null, 2)}</pre>
+      <pre>{JSON.stringify(import.meta.env, null, 2)}</pre>
       <p>{t("developer_mode.url_params")}</p>
       <pre>{JSON.stringify(urlParams, null, 2)}</pre>
     </>

src/settings/SettingsModal.tsx

@@ -51,11 +51,7 @@ interface Props {
   onTabChange: (tab: SettingsTab) => void;
   client: MatrixClient;
   roomId?: string;
-  livekitRooms?: {
-    room: LivekitRoom;
-    url: string;
-    isLocal?: boolean;
-  }[];
+  livekitRoom?: LivekitRoom;
 }
 
 export const defaultSettingsTab: SettingsTab = "audio";
@@ -67,7 +63,7 @@ export const SettingsModal: FC<Props> = ({
   onTabChange,
   client,
   roomId,
-  livekitRooms,
+  livekitRoom,
 }) => {
   const { t } = useTranslation();
 
@@ -208,13 +204,7 @@ export const SettingsModal: FC<Props> = ({
   const developerTab: Tab<SettingsTab> = {
     key: "developer",
     name: t("settings.developer_tab_title"),
-    content: (
-      <DeveloperSettingsTab
-        env={import.meta.env}
-        client={client}
-        livekitRooms={livekitRooms}
-      />
-    ),
+    content: <DeveloperSettingsTab client={client} livekitRoom={livekitRoom} />,
   };
 
   const tabs = [audioTab, videoTab];

src/settings/__snapshots__/DeveloperSettingsTab.test.tsx.snap

@@ -1,411 +0,0 @@
-// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
-
-exports[`DeveloperSettingsTab > renders and matches snapshot 1`] = `
-<div>
-  <p>
-    Hostname: localhost
-  </p>
-  <p>
-    Element Call version: dev
-  </p>
-  <p>
-    Crypto version: crypto-1.0.0
-  </p>
-  <p>
-    Matrix ID: @alice:example.org
-  </p>
-  <p>
-    Device ID: DEVICE123
-  </p>
-  <div
-    class="fieldRow"
-  >
-    <div
-      class="field inputField"
-    >
-      <input
-        aria-describedby="«r1»"
-        id="duplicateTiles"
-        min="0"
-        type="number"
-        value="0"
-      />
-      <label
-        for="duplicateTiles"
-      >
-        Number of additional tile copies per participant
-      </label>
-    </div>
-  </div>
-  <div
-    class="fieldRow"
-  >
-    <div
-      class="field checkboxField"
-    >
-      <input
-        aria-describedby="«r2»"
-        id="debugTileLayout"
-        type="checkbox"
-      />
-      <label
-        for="debugTileLayout"
-      >
-        <div
-          class="checkbox"
-        >
-          <svg
-            fill="none"
-            height="24"
-            stroke="#000"
-            stroke-linecap="round"
-            stroke-linejoin="round"
-            stroke-width="2"
-            viewBox="0 0 24 24"
-            width="24"
-            xmlns="http://www.w3.org/2000/svg"
-          >
-            <path
-              d="m20 6-11 11-5-5"
-            />
-          </svg>
-        </div>
-        Debug tile layout
-      </label>
-    </div>
-  </div>
-  <div
-    class="fieldRow"
-  >
-    <div
-      class="field checkboxField"
-    >
-      <input
-        aria-describedby="«r3»"
-        id="showConnectionStats"
-        type="checkbox"
-      />
-      <label
-        for="showConnectionStats"
-      >
-        <div
-          class="checkbox"
-        >
-          <svg
-            fill="none"
-            height="24"
-            stroke="#000"
-            stroke-linecap="round"
-            stroke-linejoin="round"
-            stroke-width="2"
-            viewBox="0 0 24 24"
-            width="24"
-            xmlns="http://www.w3.org/2000/svg"
-          >
-            <path
-              d="m20 6-11 11-5-5"
-            />
-          </svg>
-        </div>
-        Show connection statistics
-      </label>
-    </div>
-  </div>
-  <div
-    class="fieldRow"
-  >
-    <div
-      class="field checkboxField"
-    >
-      <input
-        aria-describedby="«r4»"
-        id="muteAllAudio"
-        type="checkbox"
-      />
-      <label
-        for="muteAllAudio"
-      >
-        <div
-          class="checkbox"
-        >
-          <svg
-            fill="none"
-            height="24"
-            stroke="#000"
-            stroke-linecap="round"
-            stroke-linejoin="round"
-            stroke-width="2"
-            viewBox="0 0 24 24"
-            width="24"
-            xmlns="http://www.w3.org/2000/svg"
-          >
-            <path
-              d="m20 6-11 11-5-5"
-            />
-          </svg>
-        </div>
-        Mute all audio (participants, reactions, join sounds)
-      </label>
-    </div>
-  </div>
-   
-  <div
-    class="fieldRow"
-  >
-    <div
-      class="field checkboxField"
-    >
-      <input
-        aria-describedby="«r5»"
-        id="alwaysShowIphoneEarpiece"
-        type="checkbox"
-      />
-      <label
-        for="alwaysShowIphoneEarpiece"
-      >
-        <div
-          class="checkbox"
-        >
-          <svg
-            fill="none"
-            height="24"
-            stroke="#000"
-            stroke-linecap="round"
-            stroke-linejoin="round"
-            stroke-width="2"
-            viewBox="0 0 24 24"
-            width="24"
-            xmlns="http://www.w3.org/2000/svg"
-          >
-            <path
-              d="m20 6-11 11-5-5"
-            />
-          </svg>
-        </div>
-        Show iPhone earpiece option on all platforms
-      </label>
-    </div>
-     
-  </div>
-  <form
-    class="_root_19upo_16"
-  >
-    <div
-      class="_field_19upo_26"
-    >
-      <label
-        class="_label_19upo_59"
-        for="radix-«r6»"
-      >
-        Custom Livekit-url
-      </label>
-      <div
-        class="_controls_17lij_8"
-      >
-        <input
-          aria-describedby="radix-«r7»"
-          class="_control_sqdq4_10"
-          id="radix-«r6»"
-          name="input"
-          title=""
-          value=""
-        />
-      </div>
-      <span
-        class="_message_19upo_85 _help-message_19upo_91"
-        id="radix-«r7»"
-      >
-        Currently, no overwrite is set. Url from well-known or config is used.
-      </span>
-    </div>
-  </form>
-  <h3
-    class="_typography_6v6n8_153 _font-body-lg-semibold_6v6n8_74"
-  >
-    MatrixRTC mode
-  </h3>
-  <form
-    class="_root_19upo_16"
-  >
-    <div
-      class="_inline-field_19upo_32"
-    >
-      <div
-        class="_inline-field-control_19upo_44"
-      >
-        <div
-          class="_container_1e0uz_10"
-        >
-          <input
-            aria-describedby="radix-«r9» radix-«rb» radix-«rd»"
-            checked=""
-            class="_input_1e0uz_18"
-            id="radix-«r8»"
-            name="«r0»"
-            title=""
-            type="radio"
-            value="legacy"
-          />
-          <div
-            class="_ui_1e0uz_19"
-          />
-        </div>
-      </div>
-      <div
-        class="_inline-field-body_19upo_38"
-      >
-        <label
-          class="_label_19upo_59"
-          for="radix-«r8»"
-        >
-          Legacy: state events & oldest membership SFU
-        </label>
-        <span
-          class="_message_19upo_85 _help-message_19upo_91"
-          id="radix-«r9»"
-        >
-          Compatible with old versions of EC that do not support multi SFU
-        </span>
-      </div>
-    </div>
-    <div
-      class="_inline-field_19upo_32"
-    >
-      <div
-        class="_inline-field-control_19upo_44"
-      >
-        <div
-          class="_container_1e0uz_10"
-        >
-          <input
-            aria-describedby="radix-«r9» radix-«rb» radix-«rd»"
-            class="_input_1e0uz_18"
-            id="radix-«ra»"
-            name="«r0»"
-            title=""
-            type="radio"
-            value="compatibil"
-          />
-          <div
-            class="_ui_1e0uz_19"
-          />
-        </div>
-      </div>
-      <div
-        class="_inline-field-body_19upo_38"
-      >
-        <label
-          class="_label_19upo_59"
-          for="radix-«ra»"
-        >
-          Compatibility: state events & multi SFU
-        </label>
-        <span
-          class="_message_19upo_85 _help-message_19upo_91"
-          id="radix-«rb»"
-        >
-          Compatible with homeservers that do not support sticky events (but all other EC clients are v0.17.0 or later)
-        </span>
-      </div>
-    </div>
-    <div
-      class="_inline-field_19upo_32"
-    >
-      <div
-        class="_inline-field-control_19upo_44"
-      >
-        <div
-          class="_container_1e0uz_10"
-        >
-          <input
-            aria-describedby="radix-«r9» radix-«rb» radix-«rd»"
-            class="_input_1e0uz_18"
-            id="radix-«rc»"
-            name="«r0»"
-            title=""
-            type="radio"
-            value="matrix_2_0"
-          />
-          <div
-            class="_ui_1e0uz_19"
-          />
-        </div>
-      </div>
-      <div
-        class="_inline-field-body_19upo_38"
-      >
-        <label
-          class="_label_19upo_59"
-          for="radix-«rc»"
-        >
-          Matrix 2.0: sticky events & multi SFU
-        </label>
-        <span
-          class="_message_19upo_85 _help-message_19upo_91"
-          id="radix-«rd»"
-        >
-          Compatible only with homservers supporting sticky events and all EC clients v0.17.0 or later
-        </span>
-      </div>
-    </div>
-  </form>
-  <h3>
-    LiveKit SFU: wss://local-sfu.example.org
-  </h3>
-  <p>
-    ws-url: 
-    wss://local-sfu.example.org/
-  </p>
-  <p>
-    LiveKit Server Info
-    (
-    local
-    )
-  </p>
-  <pre
-    class="pre"
-  >
-    {
-  "region": "local",
-  "version": "1.2.3"
-}
-    local-metadata
-  </pre>
-  <h3>
-    LiveKit SFU: wss://remote-sfu.example.org
-  </h3>
-  <p>
-    LiveKit Server Info
-    (
-    remote
-    )
-  </p>
-  <pre
-    class="pre"
-  >
-    {
-  "region": "remote",
-  "version": "4.5.6"
-}
-    remote-metadata
-  </pre>
-  <p>
-    Environment variables
-  </p>
-  <pre>
-    {
-  "MY_MOCK_ENV": 10,
-  "ENV": "test"
-}
-  </pre>
-  <p>
-    URL parameters
-  </p>
-  <pre>
-    {
-  "mocked": true,
-  "answer": 42
-}
-  </pre>
-</div>
-`;

src/settings/rageshake.ts

@@ -99,7 +99,7 @@ class ConsoleLogger extends EventEmitter {
 
   /**
    * Returns the log lines to flush to disk and empties the internal log buffer
-   * @return \n delimited log lines
+   * @return {string} \n delimited log lines
    */
   public popLogs(): string {
     const logsToFlush = this.logs;
@@ -109,7 +109,7 @@ class ConsoleLogger extends EventEmitter {
 
   /**
    * Returns lines currently in the log buffer without removing them
-   * @return \n delimited log lines
+   * @return {string} \n delimited log lines
    */
   public peekLogs(): string {
     return this.logs;
@@ -139,7 +139,7 @@ class IndexedDBLogStore {
   }
 
   /**
-   * @return Resolves when the store is ready.
+   * @return {Promise} Resolves when the store is ready.
    */
   public async connect(): Promise<void> {
     const req = this.indexedDB.open("logs");
@@ -219,7 +219,7 @@ class IndexedDBLogStore {
    * This guarantees that we will always eventually do a flush when flush() is
    * called.
    *
-   * @return Resolved when the logs have been flushed.
+   * @return {Promise} Resolved when the logs have been flushed.
    */
   public flush = async (): Promise<void> => {
     // check if a flush() operation is ongoing
@@ -270,7 +270,7 @@ class IndexedDBLogStore {
    * returned are deleted at the same time, so this can be called at startup
    * to do house-keeping to keep the logs from growing too large.
    *
-   * @return Resolves to an array of objects. The array is
+   * @return {Promise<Object[]>} Resolves to an array of objects. The array is
    * sorted in time (oldest first) based on when the log file was created (the
    * log ID). The objects have said log ID in an "id" field and "lines" which
    * is a big string with all the new-line delimited logs.
@@ -421,12 +421,12 @@ class IndexedDBLogStore {
 
 /**
  * Helper method to collect results from a Cursor and promiseify it.
- * @param store - The store to perform openCursor on.
- * @param keyRange - Optional key range to apply on the cursor.
- * @param resultMapper - A function which is repeatedly called with a
+ * @param {ObjectStore|Index} store The store to perform openCursor on.
+ * @param {IDBKeyRange=} keyRange Optional key range to apply on the cursor.
+ * @param {Function} resultMapper A function which is repeatedly called with a
  * Cursor.
  * Return the data you want to keep.
- * @return Resolves to an array of whatever you returned from
+ * @return {Promise<T[]>} Resolves to an array of whatever you returned from
  * resultMapper.
  */
 async function selectQuery<T>(
@@ -464,7 +464,9 @@ declare global {
 /**
  * Configure rage shaking support for sending bug reports.
  * Modifies globals.
- * @return Resolves when set up.
+ * @param {boolean} setUpPersistence When true (default), the persistence will
+ * be set up immediately for the logs.
+ * @return {Promise} Resolves when set up.
  */
 export async function init(): Promise<void> {
   global.mx_rage_logger = new ConsoleLogger();
@@ -501,7 +503,7 @@ export async function init(): Promise<void> {
 /**
  * Try to start up the rageshake storage for logs. If not possible (client unsupported)
  * then this no-ops.
- * @return Resolves when complete.
+ * @return {Promise} Resolves when complete.
  */
 async function tryInitStorage(): Promise<void> {
   if (global.mx_rage_initStoragePromise) {
@@ -534,7 +536,7 @@ async function tryInitStorage(): Promise<void> {
 /**
  * Get a recent snapshot of the logs, ready for attaching to a bug report
  *
- * @return list of log data
+ * @return {LogEntry[]}  list of log data
  */
 export async function getLogsForReport(): Promise<LogEntry[]> {
   if (!global.mx_rage_logger) {

src/settings/settings.ts

@@ -76,6 +76,10 @@ export const developerMode = new Setting("developer-settings-tab", false);
 
 export const duplicateTiles = new Setting("duplicate-tiles", 0);
 
+export const showNonMemberTiles = new Setting<boolean>(
+  "show-non-member-tiles",
+  false,
+);
 export const debugTileLayout = new Setting("debug-tile-layout", false);
 
 export const showConnectionStats = new Setting<boolean>(
@@ -115,6 +119,16 @@ export const soundEffectVolume = new Setting<number>(
   0.5,
 );
 
+export const useNewMembershipManager = new Setting<boolean>(
+  "new-membership-manager",
+  true,
+);
+
+export const useExperimentalToDeviceTransport = new Setting<boolean>(
+  "experimental-to-device-transport",
+  true,
+);
+
 export const muteAllAudio = new Setting<boolean>("mute-all-audio", false);
 
 export const alwaysShowSelf = new Setting<boolean>("always-show-self", true);
@@ -123,19 +137,3 @@ export const alwaysShowIphoneEarpiece = new Setting<boolean>(
   "always-show-iphone-earpiece",
   false,
 );
-
-export enum MatrixRTCMode {
-  Legacy = "legacy",
-  Compatibil = "compatibil",
-  Matrix_2_0 = "matrix_2_0",
-}
-
-export const matrixRTCMode = new Setting<MatrixRTCMode>(
-  "matrix-rtc-mode",
-  MatrixRTCMode.Legacy,
-);
-
-export const customLivekitUrl = new Setting<string | null>(
-  "custom-livekit-url",
-  null,
-);

src/state/AppViewModel.ts

@@ -6,16 +6,14 @@ Please see LICENSE in the repository root for full details.
 */
 
 import { MediaDevices } from "./MediaDevices";
-import { type ObservableScope } from "./ObservableScope";
+import { ViewModel } from "./ViewModel";
 
 /**
  * The top-level state holder for the application.
  */
-export class AppViewModel {
+export class AppViewModel extends ViewModel {
   public readonly mediaDevices = new MediaDevices(this.scope);
 
   // TODO: Move more application logic here. The CallViewModel, at the very
   // least, ought to be accessible from this object.
-
-  public constructor(private readonly scope: ObservableScope) {}
 }

src/state/Behavior.ts

@@ -16,10 +16,7 @@ import { BehaviorSubject } from "rxjs";
  * distinction between Behaviors and Observables, see
  * https://monoid.dk/post/behaviors-and-streams-why-both/.
  */
-export type Behavior<T> = Omit<
-  BehaviorSubject<T>,
-  "next" | "observers" | "error"
->;
+export type Behavior<T> = Omit<BehaviorSubject<T>, "next" | "observers">;
 
 /**
  * Creates a Behavior which never changes in value.

src/state/CallViewModel/CallNotificationLifecycle.test.ts

@@ -1,354 +0,0 @@
-/*
-Copyright 2025 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-import {
-  type ICallNotifyContent,
-  type IRTCNotificationContent,
-} from "matrix-js-sdk/lib/matrixrtc";
-import { describe, it } from "vitest";
-import {
-  EventType,
-  type IEvent,
-  type IRoomTimelineData,
-  MatrixEvent,
-  type Room,
-} from "matrix-js-sdk";
-
-import { withTestScheduler } from "../../utils/test";
-import {
-  aliceRtcMember,
-  local,
-  localRtcMember,
-} from "../../utils/test-fixtures";
-import {
-  createCallNotificationLifecycle$,
-  type Props as CallNotificationLifecycleProps,
-} from "./CallNotificationLifecycle";
-import { trackEpoch } from "../ObservableScope";
-
-const mockLegacyRingEvent = {} as { event_id: string } & ICallNotifyContent;
-function mockRingEvent(
-  eventId: string,
-  lifetimeMs: number | undefined,
-  sender = local.userId,
-): { event_id: string } & IRTCNotificationContent {
-  return {
-    event_id: eventId,
-    ...(lifetimeMs === undefined ? {} : { lifetime: lifetimeMs }),
-    notification_type: "ring",
-    sender,
-  } as unknown as { event_id: string } & IRTCNotificationContent;
-}
-
-describe("waitForCallPickup$", () => {
-  it("unknown -> ringing -> timeout when notified and nobody joins", () => {
-    withTestScheduler(({ scope, expectObservable, behavior, hot }) => {
-      // No one ever joins (only local user)
-      const props: CallNotificationLifecycleProps = {
-        scope,
-        memberships$: scope.behavior(
-          behavior("a", { a: [] }).pipe(trackEpoch()),
-        ),
-        sentCallNotification$: hot("10ms a", {
-          a: [mockRingEvent("$notif1", 30), mockLegacyRingEvent],
-        }),
-        receivedDecline$: hot(""),
-        options: {
-          waitForCallPickup: true,
-          autoLeaveWhenOthersLeft: false,
-        },
-        localUser: localRtcMember,
-      };
-
-      const lifecycle = createCallNotificationLifecycle$(props);
-
-      expectObservable(lifecycle.callPickupState$).toBe("a 9ms b 29ms c", {
-        a: "unknown",
-        b: "ringing",
-        c: "timeout",
-      });
-    });
-  });
-
-  it("ringing -> success if someone joins before timeout is reached", () => {
-    withTestScheduler(({ scope, hot, behavior, expectObservable }) => {
-      // Someone joins at 20ms (both LiveKit participant and MatrixRTC member)
-      const props: CallNotificationLifecycleProps = {
-        scope,
-        memberships$: scope.behavior(
-          behavior("a 19ms b", {
-            a: [localRtcMember],
-            b: [localRtcMember, aliceRtcMember],
-          }).pipe(trackEpoch()),
-        ),
-        sentCallNotification$: hot("5ms a", {
-          a: [mockRingEvent("$notif2", 100), mockLegacyRingEvent],
-        }),
-        receivedDecline$: hot(""),
-        options: {
-          waitForCallPickup: true,
-          autoLeaveWhenOthersLeft: false,
-        },
-        localUser: localRtcMember,
-      };
-      const lifecycle = createCallNotificationLifecycle$(props);
-      expectObservable(lifecycle.callPickupState$).toBe("a 4ms b 14ms c", {
-        a: "unknown",
-        b: "ringing",
-        c: "success",
-      });
-    });
-  });
-  it("success when someone joins before we notify", () => {
-    withTestScheduler(({ scope, hot, behavior, expectObservable }) => {
-      // Someone joins at 20ms (both LiveKit participant and MatrixRTC member)
-      const props: CallNotificationLifecycleProps = {
-        scope,
-        memberships$: scope.behavior(
-          behavior("a 9ms b", {
-            a: [localRtcMember],
-            b: [localRtcMember, aliceRtcMember],
-          }).pipe(trackEpoch()),
-        ),
-        sentCallNotification$: hot("20ms a", {
-          a: [mockRingEvent("$notif2", 50), mockLegacyRingEvent],
-        }),
-        receivedDecline$: hot(""),
-        options: {
-          waitForCallPickup: true,
-          autoLeaveWhenOthersLeft: false,
-        },
-        localUser: localRtcMember,
-      };
-      const lifecycle = createCallNotificationLifecycle$(props);
-      expectObservable(lifecycle.callPickupState$).toBe("a 9ms b", {
-        a: "unknown",
-        b: "success",
-      });
-    });
-  });
-  it("notify without lifetime -> immediate timeout", () => {
-    withTestScheduler(({ scope, hot, behavior, expectObservable }) => {
-      // Someone joins at 20ms (both LiveKit participant and MatrixRTC member)
-      const props: CallNotificationLifecycleProps = {
-        scope,
-        memberships$: scope.behavior(
-          behavior("a", {
-            a: [localRtcMember],
-          }).pipe(trackEpoch()),
-        ),
-        sentCallNotification$: hot("10ms a", {
-          a: [mockRingEvent("$notif2", undefined), mockLegacyRingEvent],
-        }),
-        receivedDecline$: hot(""),
-        options: {
-          waitForCallPickup: true,
-          autoLeaveWhenOthersLeft: false,
-        },
-        localUser: localRtcMember,
-      };
-      const lifecycle = createCallNotificationLifecycle$(props);
-      expectObservable(lifecycle.callPickupState$).toBe("a 9ms b", {
-        a: "unknown",
-        b: "timeout",
-      });
-    });
-  });
-
-  it("stays null when waitForCallPickup=false", () => {
-    withTestScheduler(({ scope, hot, behavior, expectObservable }) => {
-      // Someone joins at 20ms (both LiveKit participant and MatrixRTC member)
-      const validProps: CallNotificationLifecycleProps = {
-        scope,
-        memberships$: scope.behavior(
-          behavior("a--b", {
-            a: [localRtcMember],
-            b: [localRtcMember, aliceRtcMember],
-          }).pipe(trackEpoch()),
-        ),
-        sentCallNotification$: hot("10ms a", {
-          a: [mockRingEvent("$notif5", 30), mockLegacyRingEvent],
-        }),
-        receivedDecline$: hot(""),
-        options: {
-          waitForCallPickup: true,
-          autoLeaveWhenOthersLeft: false,
-        },
-        localUser: localRtcMember,
-      };
-      const propsDeactivated = {
-        ...validProps,
-        options: {
-          ...validProps.options,
-          waitForCallPickup: false,
-        },
-      };
-      const lifecycle = createCallNotificationLifecycle$(propsDeactivated);
-      expectObservable(lifecycle.callPickupState$).toBe("n", {
-        n: null,
-      });
-      const lifecycleReference = createCallNotificationLifecycle$(validProps);
-      expectObservable(lifecycleReference.callPickupState$).toBe("u--s", {
-        u: "unknown",
-        s: "success",
-      });
-    });
-  });
-
-  it("decline before timeout window ends -> decline", () => {
-    withTestScheduler(({ scope, hot, behavior, expectObservable }) => {
-      // Someone joins at 20ms (both LiveKit participant and MatrixRTC member)
-      const props: CallNotificationLifecycleProps = {
-        scope,
-        memberships$: scope.behavior(
-          behavior("a", {
-            a: [localRtcMember],
-          }).pipe(trackEpoch()),
-        ),
-        sentCallNotification$: hot("10ms a", {
-          a: [mockRingEvent("$decl1", 50), mockLegacyRingEvent],
-        }),
-        receivedDecline$: hot("40ms d", {
-          d: [
-            new MatrixEvent({
-              type: EventType.RTCDecline,
-              content: {
-                "m.relates_to": {
-                  rel_type: "m.reference",
-                  event_id: "$decl1",
-                },
-              },
-            }),
-            {} as Room,
-            undefined,
-            false,
-            {} as IRoomTimelineData,
-          ],
-        }),
-        options: {
-          waitForCallPickup: true,
-          autoLeaveWhenOthersLeft: false,
-        },
-        localUser: localRtcMember,
-      };
-      const lifecycle = createCallNotificationLifecycle$(props);
-      expectObservable(lifecycle.callPickupState$).toBe("a 9ms b 29ms e", {
-        a: "unknown",
-        b: "ringing",
-        e: "decline",
-      });
-    });
-  });
-  it("decline after timeout window ends -> stays timeout", () => {
-    withTestScheduler(({ scope, hot, behavior, expectObservable }) => {
-      // Someone joins at 20ms (both LiveKit participant and MatrixRTC member)
-      const props: CallNotificationLifecycleProps = {
-        scope,
-        memberships$: scope.behavior(
-          behavior("a", {
-            a: [localRtcMember],
-          }).pipe(trackEpoch()),
-        ),
-        sentCallNotification$: hot("10ms a", {
-          a: [mockRingEvent("$decl", 20), mockLegacyRingEvent],
-        }),
-        receivedDecline$: hot("40ms d", {
-          d: [
-            new MatrixEvent({
-              type: EventType.RTCDecline,
-              content: {
-                "m.relates_to": {
-                  rel_type: "m.reference",
-                  event_id: "$decl",
-                },
-              },
-            }),
-            {} as Room,
-            undefined,
-            false,
-            {} as IRoomTimelineData,
-          ],
-        }),
-        options: {
-          waitForCallPickup: true,
-          autoLeaveWhenOthersLeft: false,
-        },
-        localUser: localRtcMember,
-      };
-      const lifecycle = createCallNotificationLifecycle$(props);
-      expectObservable(lifecycle.callPickupState$, "50ms !").toBe(
-        "a 9ms b 19ms e",
-        {
-          a: "unknown",
-          b: "ringing",
-          e: "timeout",
-        },
-      );
-    });
-  });
-  //
-  function testStaysRinging(
-    declineEvent: Partial<IEvent>,
-    expectDecline: boolean,
-  ): void {
-    withTestScheduler(({ scope, hot, behavior, expectObservable }) => {
-      // Someone joins at 20ms (both LiveKit participant and MatrixRTC member)
-      const props: CallNotificationLifecycleProps = {
-        scope,
-        memberships$: scope.behavior(
-          behavior("a", {
-            a: [localRtcMember],
-          }).pipe(trackEpoch()),
-        ),
-        sentCallNotification$: hot("10ms a", {
-          a: [mockRingEvent("$right", 50), mockLegacyRingEvent],
-        }),
-        receivedDecline$: hot("20ms d", {
-          d: [
-            new MatrixEvent(declineEvent),
-            {} as Room,
-            undefined,
-            false,
-            {} as IRoomTimelineData,
-          ],
-        }),
-        options: {
-          waitForCallPickup: true,
-          autoLeaveWhenOthersLeft: false,
-        },
-        localUser: localRtcMember,
-      };
-      const lifecycle = createCallNotificationLifecycle$(props);
-      const marbles = expectDecline ? "a 9ms b 9ms d" : "a 9ms b";
-      expectObservable(lifecycle.callPickupState$, "21ms !").toBe(marbles, {
-        a: "unknown",
-        b: "ringing",
-        d: "decline",
-      });
-    });
-  }
-  const reference = (refId?: string, sender?: string): Partial<IEvent> => ({
-    event_id: "$decline",
-    type: EventType.RTCDecline,
-    sender: sender ?? "@other:example.org",
-    content: {
-      "m.relates_to": {
-        rel_type: "m.reference",
-        event_id: refId ?? "$right",
-      },
-    },
-  });
-  it("decline reference works", () => {
-    testStaysRinging(reference(), true);
-  });
-  it("decline with wrong id is ignored (stays ringing)", () => {
-    testStaysRinging(reference("$wrong"), false);
-  });
-  it("decline with wrong id is ignored (stays ringing)", () => {
-    testStaysRinging(reference(undefined, local.userId), false);
-  });
-});

src/state/CallViewModel/CallNotificationLifecycle.ts

@@ -1,211 +0,0 @@
-/*
-Copyright 2025 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-import {
-  type CallMembership,
-  type MatrixRTCSession,
-  MatrixRTCSessionEvent,
-  type MatrixRTCSessionEventHandlerMap,
-} from "matrix-js-sdk/lib/matrixrtc";
-import {
-  combineLatest,
-  concat,
-  endWith,
-  filter,
-  fromEvent,
-  ignoreElements,
-  map,
-  merge,
-  NEVER,
-  type Observable,
-  of,
-  pairwise,
-  startWith,
-  switchMap,
-  takeUntil,
-  timer,
-} from "rxjs";
-import {
-  type EventTimelineSetHandlerMap,
-  EventType,
-  type Room as MatrixRoom,
-  RoomEvent,
-} from "matrix-js-sdk";
-
-import { type Behavior } from "../Behavior";
-import { type Epoch, mapEpoch, type ObservableScope } from "../ObservableScope";
-export type AutoLeaveReason = "allOthersLeft" | "timeout" | "decline";
-export type CallPickupState =
-  | "unknown"
-  | "ringing"
-  | "timeout"
-  | "decline"
-  | "success"
-  | null;
-export type CallNotificationWrapper = Parameters<
-  MatrixRTCSessionEventHandlerMap[MatrixRTCSessionEvent.DidSendCallNotification]
->;
-export function createSentCallNotification$(
-  scope: ObservableScope,
-  matrixRTCSession: MatrixRTCSession,
-): Behavior<CallNotificationWrapper | null> {
-  const sentCallNotification$ = scope.behavior(
-    fromEvent(matrixRTCSession, MatrixRTCSessionEvent.DidSendCallNotification),
-    null,
-  ) as Behavior<CallNotificationWrapper | null>;
-  return sentCallNotification$;
-}
-
-export function createReceivedDecline$(
-  matrixRoom: MatrixRoom,
-): Observable<Parameters<EventTimelineSetHandlerMap[RoomEvent.Timeline]>> {
-  return (
-    fromEvent(matrixRoom, RoomEvent.Timeline) as Observable<
-      Parameters<EventTimelineSetHandlerMap[RoomEvent.Timeline]>
-    >
-  ).pipe(filter(([event]) => event.getType() === EventType.RTCDecline));
-}
-
-export interface Props {
-  scope: ObservableScope;
-  memberships$: Behavior<Epoch<CallMembership[]>>;
-  sentCallNotification$: Observable<CallNotificationWrapper | null>;
-  receivedDecline$: Observable<
-    Parameters<EventTimelineSetHandlerMap[RoomEvent.Timeline]>
-  >;
-  options: { waitForCallPickup?: boolean; autoLeaveWhenOthersLeft?: boolean };
-  localUser: { deviceId: string; userId: string };
-}
-/**
- * @returns two observables:
- * `callPickupState$` The current call pickup state of the call.
- *  - "unknown": The client has not yet sent the notification event. We don't know if it will because it first needs to send its own membership.
- *     Then we can conclude if we were the first one to join or not.
- *     This may also be set if we are disconnected.
- *  - "ringing": The call is ringing on other devices in this room (This client should give audiovisual feedback that this is happening).
- *  - "timeout": No-one picked up in the defined time this call should be ringing on others devices.
- *     The call failed. If desired this can be used as a trigger to exit the call.
- *  - "success": Someone else joined. The call is in a normal state. No audiovisual feedback.
- *  - null: EC is configured to never show any waiting for answer state.
- *
- * `autoLeave$` An observable that emits (null) when the call should be automatically left.
- *  - if options.autoLeaveWhenOthersLeft is set to true it emits when all others left.
- *  - if options.waitForCallPickup is set to true it emits if noone picked up the ring or if the ring got declined.
- *  - if options.autoLeaveWhenOthersLeft && options.waitForCallPickup is false it will never emit.
- *
- */
-export function createCallNotificationLifecycle$({
-  scope,
-  memberships$,
-  sentCallNotification$,
-  receivedDecline$,
-  options,
-  localUser,
-}: Props): {
-  callPickupState$: Behavior<CallPickupState>;
-  autoLeave$: Observable<AutoLeaveReason>;
-} {
-  const allOthersLeft$ = memberships$.pipe(
-    pairwise(),
-    filter(
-      ([{ value: prev }, { value: current }]) =>
-        current.every((m) => m.userId === localUser.userId) &&
-        prev.some((m) => m.userId !== localUser.userId),
-    ),
-    map(() => {}),
-  );
-
-  /**
-   * Whether some Matrix user other than ourself is joined to the call.
-   */
-  const someoneElseJoined$ = memberships$.pipe(
-    mapEpoch((ms) => ms.some((m) => m.userId !== localUser.userId)),
-  ) as Behavior<Epoch<boolean>>;
-
-  /**
-   * Whenever the RTC session tells us that it intends to ring the remote
-   * participant's devices, this emits an Observable tracking the current state of
-   * that ringing process.
-   */
-  // This is a behavior since we need to store the latest state for when we subscribe to this after `didSendCallNotification$`
-  // has already emitted but we still need the latest observable with a timeout timer that only gets created on after receiving `notificationEvent`.
-  // A behavior will emit the latest observable with the running timer to new subscribers.
-  // see also: callPickupState$ and in particular the line: `return this.ring$.pipe(mergeAll());` here we otherwise might get an EMPTY observable if
-  // `ring$` would not be a behavior.
-  const remoteRingState$: Behavior<"ringing" | "timeout" | "decline" | null> =
-    scope.behavior(
-      sentCallNotification$.pipe(
-        filter(
-          (newAndLegacyEvents) =>
-            // only care about new events (legacy do not have decline pattern)
-            newAndLegacyEvents?.[0].notification_type === "ring",
-        ),
-        map((e) => e as CallNotificationWrapper),
-        switchMap(([notificationEvent]) => {
-          const lifetimeMs = notificationEvent?.lifetime ?? 0;
-          return concat(
-            lifetimeMs === 0
-              ? // If no lifetime, skip the ring state
-                of(null)
-              : // Ring until lifetime ms have passed
-                timer(lifetimeMs).pipe(
-                  ignoreElements(),
-                  startWith("ringing" as const),
-                ),
-            // The notification lifetime has timed out, meaning ringing has likely
-            // stopped on all receiving clients.
-            of("timeout" as const),
-            // This makes sure we will not drop into the `endWith("decline" as const)` state
-            NEVER,
-          ).pipe(
-            takeUntil(
-              receivedDecline$.pipe(
-                filter(
-                  ([event]) =>
-                    event.getRelation()?.rel_type === "m.reference" &&
-                    event.getRelation()?.event_id ===
-                      notificationEvent.event_id &&
-                    event.getSender() !== localUser.userId &&
-                    callPickupState$.value !== "timeout",
-                ),
-              ),
-            ),
-            endWith("decline" as const),
-          );
-        }),
-      ),
-      null,
-    );
-
-  const callPickupState$ = scope.behavior(
-    options.waitForCallPickup === true
-      ? combineLatest(
-          [someoneElseJoined$, remoteRingState$],
-          (someoneElseJoined, ring) => {
-            if (someoneElseJoined.value === true) {
-              return "success" as const;
-            }
-            // Show the ringing state of the most recent ringing attempt.
-            // as long as we have not yet sent an RTC notification event or noone else joined,
-            // ring will be null -> callPickupState$ = unknown.
-            return ring ?? ("unknown" as const);
-          },
-        )
-      : NEVER,
-    null,
-  );
-
-  const autoLeave$ = merge(
-    options.autoLeaveWhenOthersLeft === true
-      ? allOthersLeft$.pipe(map(() => "allOthersLeft" as const))
-      : NEVER,
-    callPickupState$.pipe(
-      filter((state) => state === "timeout" || state === "decline"),
-    ),
-  );
-  return { autoLeave$, callPickupState$ };
-}