Un-hardcode the slot ID

pnpm-lock.yaml

@@ -192,7 +192,7 @@ importers:
         version: 1.9.2
       matrix-js-sdk:
         specifier: github:matrix-org/matrix-js-sdk#robin/livekit-updates
-        version: https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/621b225e227dc6dc2b1c9d53413235d8999e6d54
+        version: https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/29099d884f08c90a1bc61b31bae0a937b0dc94ff
       matrix-widget-api:
         specifier: ^1.20.0
         version: 1.20.0
@@ -4673,9 +4673,9 @@ packages:
   matrix-events-sdk@0.0.1:
     resolution: {integrity: sha512-1QEOsXO+bhyCroIe2/A5OwaxHvBm7EsSQ46DEDn8RBIfQwN5HWBpFvyWWR4QY0KHPPnnJdI99wgRiAl7Ad5qaA==}
 
-  matrix-js-sdk@https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/621b225e227dc6dc2b1c9d53413235d8999e6d54:
-    resolution: {gitHosted: true, integrity: sha512-HeTjG3NPGeCMkfPfGPaYl1QBnn7XYRiC1NpBgOxflujzQmTBNTPshGSTzMsMQKH/hpfi8QtjPE1SddNzzax3vA==, tarball: https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/621b225e227dc6dc2b1c9d53413235d8999e6d54}
-    version: 42.3.0
+  matrix-js-sdk@https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/29099d884f08c90a1bc61b31bae0a937b0dc94ff:
+    resolution: {gitHosted: true, integrity: sha512-3614DKOUwhaTbGbLbWWMTrdQvRE0J7oucUTbrfr95fbAn/Zb1TZvwhVs3B94o4i9HrBf2hq1m1VwusAslg2WTQ==, tarball: https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/29099d884f08c90a1bc61b31bae0a937b0dc94ff}
+    version: 43.0.0
     engines: {node: '>=22.0.0'}
 
   matrix-widget-api@1.20.0:
@@ -10227,7 +10227,7 @@ snapshots:
 
   matrix-events-sdk@0.0.1: {}
 
-  matrix-js-sdk@https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/621b225e227dc6dc2b1c9d53413235d8999e6d54:
+  matrix-js-sdk@https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/29099d884f08c90a1bc61b31bae0a937b0dc94ff:
     dependencies:
       '@babel/runtime': 8.0.0
       '@matrix-org/matrix-sdk-crypto-wasm': 18.9.0

src/livekit/auth/csApi.ts

@@ -11,10 +11,6 @@ import { type CallMembershipIdentityParts } from "matrix-js-sdk/lib/matrixrtc/En
 import { extractFullConfigFromToken, type SFUConfig } from "./types.ts";
 import { doNetworkOperationWithRetry } from "../../utils/matrix.ts";
 
-// TODO: This should come from the `MatrixRTCSession`s slot description instead
-// of being hardcoded here. (the legacy flow hardcodes it as well)
-const SLOT_ID = "m.call#ROOM";
-
 export type ClientGetTokenParts = Pick<
   MatrixClient,
   "_unstable_getLivekitToken"
@@ -37,6 +33,10 @@ export interface GetSFUConfigParams {
    * The ID of the Matrix room in which the session takes place.
    */
   roomId: string;
+  /**
+   * The ID of the MatrixRTC slot in which the session takes place.
+   */
+  slotId: string;
 }
 
 /**
@@ -48,12 +48,13 @@ export async function getSFUConfig({
   membership,
   url,
   roomId,
+  slotId,
 }: GetSFUConfigParams): Promise<SFUConfig> {
   const res = await doNetworkOperationWithRetry(async () =>
     client._unstable_getLivekitToken({
       url,
       room_id: roomId,
-      slot_id: "m.call#ROOM",
+      slot_id: slotId,
       member_id: membership.memberId,
     }),
   );
@@ -80,9 +81,13 @@ export interface DelegateDelayedLeaveParams {
    */
   url: string;
   /**
-   * The ID of the room in which the session takes place.
+   * The ID of the Matrix room in which the session takes place.
    */
   roomId: string;
+  /**
+   * The ID of the MatrixRTC slot in which the session takes place.
+   */
+  slotId: string;
   /**
    * The delay ID of the leave event to be delegated.
    */
@@ -98,13 +103,14 @@ export async function delegateDelayedLeave({
   membership,
   url,
   roomId,
+  slotId,
   delayId,
 }: DelegateDelayedLeaveParams): Promise<void> {
   await doNetworkOperationWithRetry(async () =>
     client._unstable_delegateDelayedLeave({
       url,
       room_id: roomId,
-      slot_id: SLOT_ID,
+      slot_id: slotId,
       member_id: membership.memberId,
       delay_id: delayId,
     }),

src/livekit/auth/index.ts

@@ -54,6 +54,10 @@ export interface GetSFUConfigParams {
    * The ID of the Matrix room in which the session takes place.
    */
   roomId: string;
+  /**
+   * The ID of the MatrixRTC slot in which the session takes place.
+   */
+  slotId: string;
   /**
    * Whether we want to publish or only subscribe on the {@link transport}.
    */
@@ -69,6 +73,7 @@ export async function getSFUConfig({
   membership,
   transport,
   roomId,
+  slotId,
   role,
   logger,
 }: GetSFUConfigParams): Promise<SFUConfig> {
@@ -79,6 +84,7 @@ export async function getSFUConfig({
         membership,
         url: transport.url,
         roomId,
+        slotId,
       });
     } catch (e) {
       if (isEndpointUnsupported(e)) {
@@ -110,6 +116,7 @@ export async function getSFUConfig({
     membership,
     serviceUrl: transport.livekit_service_url,
     roomId,
+    slotId,
     role,
     logger,
   });
@@ -130,9 +137,13 @@ export interface DelegateDelayedLeaveParams {
    */
   transport: UnstableLivekitTransport;
   /**
-   * The ID of the room in which the session takes place.
+   * The ID of the Matrix room in which the session takes place.
    */
   roomId: string;
+  /**
+   * The ID of the MatrixRTC slot in which the session takes place.
+   */
+  slotId: string;
   /**
    * The delay ID of the leave event to be delegated.
    */
@@ -149,6 +160,7 @@ export async function delegateDelayedLeave({
   membership,
   transport,
   roomId,
+  slotId,
   delayId,
   logger,
 }: DelegateDelayedLeaveParams): Promise<void> {
@@ -159,6 +171,7 @@ export async function delegateDelayedLeave({
         membership,
         url: transport.url,
         roomId,
+        slotId,
         delayId,
       });
     } catch (e) {
@@ -176,6 +189,7 @@ export async function delegateDelayedLeave({
       membership,
       serviceUrl: transport.livekit_service_url,
       roomId,
+      slotId,
       role: "publisher",
       delayEndpointBaseUrl: client.baseUrl,
       delayId,

src/livekit/auth/openID.test.ts

@@ -48,6 +48,7 @@ describe("getSFUConfig", () => {
       membership: ownMemberMock,
       serviceUrl: "https://sfu.example.org",
       roomId: "!example_room_id",
+      slotId: "m.call#room",
       role: "subscriber",
       logger,
     };

src/livekit/auth/openID.ts

@@ -38,6 +38,10 @@ export interface GetSFUConfigParams {
    * The ID of the Matrix room in which the session takes place.
    */
   roomId: string;
+  /**
+   * The ID of the MatrixRTC slot in which the session takes place.
+   */
+  slotId: string;
   /**
    * Whether we want to publish or only subscribe on the {@link transport}.
    */
@@ -56,13 +60,14 @@ export interface GetSFUConfigParams {
 /**
  * Gets an {@link SFUConfig} appropriate for connecting to the SFU behind a
  * given service URL, using the legacy OpenID flow.
- * @throws FailToGetOpenIdToken
+ * @throws {@link FailToGetOpenIdToken}
  */
 export async function getSFUConfig({
   client,
   membership,
   serviceUrl,
   roomId,
+  slotId,
   role,
   delayEndpointBaseUrl,
   delayId,
@@ -106,6 +111,7 @@ export async function getSFUConfig({
       membership,
       serviceUrl,
       roomId,
+      slotId,
       openIdToken,
       delayEndpointBaseUrl,
       delayId,
@@ -129,6 +135,7 @@ async function getLiveKitJWTLegacy(
   membership: CallMembershipIdentityParts,
   livekitServiceURL: string,
   matrixRoomId: string,
+  _slotId: string, // Unused - the legacy endpoint is from before slots existed.
   openIDToken: IOpenIDToken,
   delayEndpointBaseUrl?: string,
   delayId?: string,
@@ -209,6 +216,7 @@ async function getLiveKitJWT(
   membership: CallMembershipIdentityParts,
   livekitServiceURL: string,
   matrixRoomId: string,
+  slotId: string,
   openIDToken: IOpenIDToken,
   delayEndpointBaseUrl?: string,
   delayId?: string,
@@ -217,7 +225,7 @@ async function getLiveKitJWT(
 
   const body = {
     room_id: matrixRoomId,
-    slot_id: "m.call#ROOM",
+    slot_id: slotId,
     openid_token: openIDToken,
     member: {
       id: memberId,

src/settings/DeveloperSettingsTab.tsx

@@ -527,6 +527,7 @@ export const DeveloperSettingsTab: FC<Props> = ({
                 membership: { userId, deviceId, memberId: "" },
                 transport,
                 roomId,
+                slotId: "org.example.fake-slot#room",
                 role: "publisher",
                 logger,
               });

src/state/CallViewModel/CallViewModel.ts

@@ -582,6 +582,7 @@ export function createCallViewModel$(
     new ECConnectionFactory(
       client,
       matrixRoom.roomId,
+      matrixRTCSession.slotId,
       mediaDevices,
       trackProcessorState$,
       livekitKeyProvider,

src/state/CallViewModel/CallViewModelTestUtils.ts

@@ -225,6 +225,7 @@ export function withCallViewModel(mode: MatrixRTCMode) {
                 ownMembershipIdentity,
                 client: room.client,
                 roomId: room.roomId,
+                slotId: "m.call#room",
                 livekitRoomFactory,
               },
               logger,

src/state/CallViewModel/localMember/LocalMember.test.ts

@@ -300,6 +300,7 @@ describe("LocalMembership", () => {
       scope,
       ...defaultCreateLocalMemberValues,
       matrixRTCSession: {
+        slotId: "m.call#room",
         updateCallIntent: vi.fn().mockImplementation(reject),
         leave: vi.fn(),
       },

src/state/CallViewModel/localMember/LocalMember.ts

@@ -153,7 +153,10 @@ interface Props {
   ownMembershipIdentity: CallMembershipIdentityParts;
   localTransport$: Observable<UnstableLivekitTransport>;
   client: ClientDelegationParts & ClientOpenIDParts;
-  matrixRTCSession: Pick<MatrixRTCSession, "updateCallIntent" | "leave">;
+  matrixRTCSession: Pick<
+    MatrixRTCSession,
+    "slotId" | "updateCallIntent" | "leave"
+  >;
   /** Whether to hide the screen-sharing button. */
   hideScreensharing: boolean;
   /** The application hosting Element Call, to be kept informed of join/leave. */
@@ -710,6 +713,7 @@ export const createLocalMembership$ = ({
             client,
             membership: ownMembershipIdentity,
             transport: joinParams.transport,
+            slotId: matrixRTCSession.slotId,
             roomId,
             delayId,
             logger,

src/state/CallViewModel/remoteMembers/Connection.test.ts

@@ -59,6 +59,7 @@ let localParticipantEventEmiter: EventEmitter;
 let fakeLocalParticipant: MockedObject<LocalParticipant>;
 
 const ROOM_ID = "!roomID:example.org";
+const SLOT_ID = "m.call#room";
 
 const transport: UnstableLivekitTransport = {
   type: "livekit",
@@ -122,6 +123,7 @@ function setupRemoteConnection(): Connection {
   const opts: ConnectionOpts = {
     client: client,
     roomId: ROOM_ID,
+    slotId: SLOT_ID,
     role: "subscriber",
     transport: transport,
     scope: testScope,
@@ -169,6 +171,7 @@ describe("Start connection states", () => {
     const opts: ConnectionOpts = {
       client: client,
       roomId: ROOM_ID,
+      slotId: SLOT_ID,
       role: "subscriber",
       transport: transport,
       scope: testScope,
@@ -187,6 +190,7 @@ describe("Start connection states", () => {
     const opts: ConnectionOpts = {
       client: client,
       roomId: ROOM_ID,
+      slotId: SLOT_ID,
       role: "subscriber",
       transport: transport,
       scope: testScope,
@@ -238,6 +242,7 @@ describe("Start connection states", () => {
     const opts: ConnectionOpts = {
       client: client,
       roomId: ROOM_ID,
+      slotId: SLOT_ID,
       role: "subscriber",
       transport: transport,
       scope: testScope,
@@ -298,6 +303,7 @@ describe("Start connection states", () => {
     const opts: ConnectionOpts = {
       client: client,
       roomId: ROOM_ID,
+      slotId: SLOT_ID,
       role: "subscriber",
       transport: transport,
       scope: testScope,
@@ -537,6 +543,7 @@ describe("remote track logging", () => {
       {
         client,
         roomId: ROOM_ID,
+        slotId: SLOT_ID,
         role: "subscriber",
         transport: transport,
         scope: testScope,

src/state/CallViewModel/remoteMembers/Connection.ts

@@ -53,8 +53,10 @@ export interface ConnectionOpts {
   transport: UnstableLivekitTransport;
   /** The Matrix client to use for OpenID and SFU config requests. */
   client: ClientGetTokenParts & ClientOpenIDParts;
-  /** The room ID this connection is associated with. */
+  /** The ID of the Matrix room in which the session takes place. */
   roomId: string;
+  /** The ID of the MatrixRTC slot in which the session takes place. */
+  slotId: string;
   /** The observable scope to use for this connection. */
   scope: ObservableScope;
 
@@ -142,6 +144,7 @@ export class Connection {
   // TODO: can we just keep the ConnectionOpts object instead of spreading?
   private readonly client: ClientGetTokenParts & ClientOpenIDParts;
   private readonly roomId: string;
+  private readonly slotId: string;
   private readonly logger: Logger;
   private readonly ownMembershipIdentity: CallMembershipIdentityParts;
   /**
@@ -154,6 +157,7 @@ export class Connection {
   public constructor(opts: ConnectionOpts, logger: Logger) {
     this.ownMembershipIdentity = opts.ownMembershipIdentity;
     this.roomId = opts.roomId;
+    this.slotId = opts.slotId;
     this.logger = logger.getChild(
       `[Connection ${JSON.stringify(opts.transport)}]`,
     );
@@ -398,6 +402,7 @@ export class Connection {
       role: this.role,
       transport: this.transport,
       roomId: this.roomId,
+      slotId: this.slotId,
       logger: this.logger,
     });
   }

src/state/CallViewModel/remoteMembers/ConnectionFactory.ts

@@ -58,7 +58,8 @@ export class ECConnectionFactory implements ConnectionFactory {
    * Creates a ConnectionFactory for LiveKit connections.
    *
    * @param client - The OpenID client parts for authentication, needed to get openID and JWT tokens.
-   * @param roomId - The current room ID.
+   * @param roomId - The ID of the Matrix room in which the session takes place.
+   * @param slotId - The ID of the MatrixRTC slot in which the session takes place.
    * @param devices - Used for video/audio out/in capture options.
    * @param processorState$ - Effects like background blur (only for publishing connection?)
    * @param livekitKeyProvider - Optional key provider for end-to-end encryption.
@@ -68,6 +69,7 @@ export class ECConnectionFactory implements ConnectionFactory {
   public constructor(
     private client: ClientGetTokenParts & ClientOpenIDParts,
     private readonly roomId: string,
+    private readonly slotId: string,
     private devices: MediaDevices,
     private processorState$: Behavior<ProcessorState>,
     livekitKeyProvider: BaseKeyProvider | undefined,
@@ -111,6 +113,7 @@ export class ECConnectionFactory implements ConnectionFactory {
     return new Connection(
       {
         roomId: this.roomId,
+        slotId: this.slotId,
         role,
         transport,
         client: this.client,

src/state/CallViewModel/remoteMembers/ECConnectionFactory.test.ts

@@ -84,6 +84,7 @@ describe("ECConnectionFactory - Audio inputs options", () => {
       const ecConnectionFactory = new ECConnectionFactory(
         mockClient,
         "!roomid:example.org",
+        "m.call#room",
         mockMediaDevices({}),
         new BehaviorSubject<ProcessorState>({
           supported: true,
@@ -127,6 +128,7 @@ describe("ECConnectionFactory - ControlledAudioDevice", () => {
       const ecConnectionFactory = new ECConnectionFactory(
         mockClient,
         "!roomid:example.org",
+        "m.call#room",
         mockMediaDevices({
           audioOutput: {
             available$: constant(new Map<never, never>()),
@@ -169,6 +171,7 @@ describe("ECConnectionFactory - Camera quality settings", () => {
     const ecConnectionFactory = new ECConnectionFactory(
       mockClient,
       "!roomid:example.org",
+      "m.call#room",
       mockMediaDevices({}),
       new BehaviorSubject<ProcessorState>({
         supported: true,
@@ -207,6 +210,7 @@ describe("ECConnectionFactory - Camera quality settings", () => {
     const ecConnectionFactory = new ECConnectionFactory(
       mockClient,
       "!roomid:example.org",
+      "m.call#room",
       mockMediaDevices({}),
       new BehaviorSubject<ProcessorState>({
         supported: true,
@@ -246,6 +250,7 @@ describe("ECConnectionFactory - Camera quality settings", () => {
     const ecConnectionFactory = new ECConnectionFactory(
       mockClient,
       "!roomid:example.org",
+      "m.call#room",
       mockMediaDevices({}),
       new BehaviorSubject<ProcessorState>({
         supported: true,

src/state/CallViewModel/remoteMembers/integration.test.ts

@@ -76,6 +76,7 @@ beforeEach(() => {
   ecConnectionFactory = new ECConnectionFactory(
     mockClient,
     "!roomid:example.org",
+    "m.call#room",
     mockMediaDevices({}),
     new BehaviorSubject<ProcessorState>({
       supported: true,