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1 files changed, 0 insertions, 3487 deletions

diff --git a/includes/external/matrix/node_modules/matrix-js-sdk/src/models/room.ts b/includes/external/matrix/node_modules/matrix-js-sdk/src/models/room.ts
deleted file mode 100644
index 133b210..0000000
--- a/includes/external/matrix/node_modules/matrix-js-sdk/src/models/room.ts
+++ /dev/null
@@ -1,3487 +0,0 @@
-/*
-Copyright 2015 - 2023 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import { M_POLL_START, Optional } from "matrix-events-sdk";
-
-import {
-    EventTimelineSet,
-    DuplicateStrategy,
-    IAddLiveEventOptions,
-    EventTimelineSetHandlerMap,
-} from "./event-timeline-set";
-import { Direction, EventTimeline } from "./event-timeline";
-import { getHttpUriForMxc } from "../content-repo";
-import * as utils from "../utils";
-import { normalize, noUnsafeEventProps } from "../utils";
-import { IEvent, IThreadBundledRelationship, MatrixEvent, MatrixEventEvent, MatrixEventHandlerMap } from "./event";
-import { EventStatus } from "./event-status";
-import { RoomMember } from "./room-member";
-import { IRoomSummary, RoomSummary } from "./room-summary";
-import { logger } from "../logger";
-import { TypedReEmitter } from "../ReEmitter";
-import {
-    EventType,
-    RoomCreateTypeField,
-    RoomType,
-    UNSTABLE_ELEMENT_FUNCTIONAL_USERS,
-    EVENT_VISIBILITY_CHANGE_TYPE,
-    RelationType,
-} from "../@types/event";
-import { IRoomVersionsCapability, MatrixClient, PendingEventOrdering, RoomVersionStability } from "../client";
-import { GuestAccess, HistoryVisibility, JoinRule, ResizeMethod } from "../@types/partials";
-import { Filter, IFilterDefinition } from "../filter";
-import { RoomState, RoomStateEvent, RoomStateEventHandlerMap } from "./room-state";
-import { BeaconEvent, BeaconEventHandlerMap } from "./beacon";
-import {
-    Thread,
-    ThreadEvent,
-    EventHandlerMap as ThreadHandlerMap,
-    FILTER_RELATED_BY_REL_TYPES,
-    THREAD_RELATION_TYPE,
-    FILTER_RELATED_BY_SENDERS,
-    ThreadFilterType,
-} from "./thread";
-import {
-    CachedReceiptStructure,
-    MAIN_ROOM_TIMELINE,
-    Receipt,
-    ReceiptContent,
-    ReceiptType,
-} from "../@types/read_receipts";
-import { IStateEventWithRoomId } from "../@types/search";
-import { RelationsContainer } from "./relations-container";
-import { ReadReceipt, synthesizeReceipt } from "./read-receipt";
-import { Poll, PollEvent } from "./poll";
-
-// These constants are used as sane defaults when the homeserver doesn't support
-// the m.room_versions capability. In practice, KNOWN_SAFE_ROOM_VERSION should be
-// the same as the common default room version whereas SAFE_ROOM_VERSIONS are the
-// room versions which are considered okay for people to run without being asked
-// to upgrade (ie: "stable"). Eventually, we should remove these when all homeservers
-// return an m.room_versions capability.
-export const KNOWN_SAFE_ROOM_VERSION = "9";
-const SAFE_ROOM_VERSIONS = ["1", "2", "3", "4", "5", "6", "7", "8", "9"];
-
-interface IOpts {
-    /**
-     * Controls where pending messages appear in a room's timeline.
-     * If "<b>chronological</b>", messages will appear in the timeline when the call to `sendEvent` was made.
-     * If "<b>detached</b>", pending messages will appear in a separate list,
-     * accessible via {@link Room#getPendingEvents}.
-     * Default: "chronological".
-     */
-    pendingEventOrdering?: PendingEventOrdering;
-    /**
-     * Set to true to enable improved timeline support.
-     */
-    timelineSupport?: boolean;
-    lazyLoadMembers?: boolean;
-}
-
-export interface IRecommendedVersion {
-    version: string;
-    needsUpgrade: boolean;
-    urgent: boolean;
-}
-
-// When inserting a visibility event affecting event `eventId`, we
-// need to scan through existing visibility events for `eventId`.
-// In theory, this could take an unlimited amount of time if:
-//
-// - the visibility event was sent by a moderator; and
-// - `eventId` already has many visibility changes (usually, it should
-//   be 2 or less); and
-// - for some reason, the visibility changes are received out of order
-//   (usually, this shouldn't happen at all).
-//
-// For this reason, we limit the number of events to scan through,
-// expecting that a broken visibility change for a single event in
-// an extremely uncommon case (possibly a DoS) is a small
-// price to pay to keep matrix-js-sdk responsive.
-const MAX_NUMBER_OF_VISIBILITY_EVENTS_TO_SCAN_THROUGH = 30;
-
-export type NotificationCount = Partial<Record<NotificationCountType, number>>;
-
-export enum NotificationCountType {
-    Highlight = "highlight",
-    Total = "total",
-}
-
-export interface ICreateFilterOpts {
-    // Populate the filtered timeline with already loaded events in the room
-    // timeline. Useful to disable for some filters that can't be achieved by the
-    // client in an efficient manner
-    prepopulateTimeline?: boolean;
-    useSyncEvents?: boolean;
-    pendingEvents?: boolean;
-}
-
-export enum RoomEvent {
-    MyMembership = "Room.myMembership",
-    Tags = "Room.tags",
-    AccountData = "Room.accountData",
-    Receipt = "Room.receipt",
-    Name = "Room.name",
-    Redaction = "Room.redaction",
-    RedactionCancelled = "Room.redactionCancelled",
-    LocalEchoUpdated = "Room.localEchoUpdated",
-    Timeline = "Room.timeline",
-    TimelineReset = "Room.timelineReset",
-    TimelineRefresh = "Room.TimelineRefresh",
-    OldStateUpdated = "Room.OldStateUpdated",
-    CurrentStateUpdated = "Room.CurrentStateUpdated",
-    HistoryImportedWithinTimeline = "Room.historyImportedWithinTimeline",
-    UnreadNotifications = "Room.UnreadNotifications",
-}
-
-export type RoomEmittedEvents =
-    | RoomEvent
-    | RoomStateEvent.Events
-    | RoomStateEvent.Members
-    | RoomStateEvent.NewMember
-    | RoomStateEvent.Update
-    | RoomStateEvent.Marker
-    | ThreadEvent.New
-    | ThreadEvent.Update
-    | ThreadEvent.NewReply
-    | ThreadEvent.Delete
-    | MatrixEventEvent.BeforeRedaction
-    | BeaconEvent.New
-    | BeaconEvent.Update
-    | BeaconEvent.Destroy
-    | BeaconEvent.LivenessChange
-    | PollEvent.New;
-
-export type RoomEventHandlerMap = {
-    /**
-     * Fires when the logged in user's membership in the room is updated.
-     *
-     * @param room - The room in which the membership has been updated
-     * @param membership - The new membership value
-     * @param prevMembership - The previous membership value
-     */
-    [RoomEvent.MyMembership]: (room: Room, membership: string, prevMembership?: string) => void;
-    /**
-     * Fires whenever a room's tags are updated.
-     * @param event - The tags event
-     * @param room - The room whose Room.tags was updated.
-     * @example
-     * ```
-     * matrixClient.on("Room.tags", function(event, room){
-     *   var newTags = event.getContent().tags;
-     *   if (newTags["favourite"]) showStar(room);
-     * });
-     * ```
-     */
-    [RoomEvent.Tags]: (event: MatrixEvent, room: Room) => void;
-    /**
-     * Fires whenever a room's account_data is updated.
-     * @param event - The account_data event
-     * @param room - The room whose account_data was updated.
-     * @param prevEvent - The event being replaced by
-     * the new account data, if known.
-     * @example
-     * ```
-     * matrixClient.on("Room.accountData", function(event, room, oldEvent){
-     *   if (event.getType() === "m.room.colorscheme") {
-     *       applyColorScheme(event.getContents());
-     *   }
-     * });
-     * ```
-     */
-    [RoomEvent.AccountData]: (event: MatrixEvent, room: Room, lastEvent?: MatrixEvent) => void;
-    /**
-     * Fires whenever a receipt is received for a room
-     * @param event - The receipt event
-     * @param room - The room whose receipts was updated.
-     * @example
-     * ```
-     * matrixClient.on("Room.receipt", function(event, room){
-     *   var receiptContent = event.getContent();
-     * });
-     * ```
-     */
-    [RoomEvent.Receipt]: (event: MatrixEvent, room: Room) => void;
-    /**
-     * Fires whenever the name of a room is updated.
-     * @param room - The room whose Room.name was updated.
-     * @example
-     * ```
-     * matrixClient.on("Room.name", function(room){
-     *   var newName = room.name;
-     * });
-     * ```
-     */
-    [RoomEvent.Name]: (room: Room) => void;
-    /**
-     * Fires when an event we had previously received is redacted.
-     *
-     * (Note this is *not* fired when the redaction happens before we receive the
-     * event).
-     *
-     * @param event - The matrix redaction event
-     * @param room - The room containing the redacted event
-     */
-    [RoomEvent.Redaction]: (event: MatrixEvent, room: Room) => void;
-    /**
-     * Fires when an event that was previously redacted isn't anymore.
-     * This happens when the redaction couldn't be sent and
-     * was subsequently cancelled by the user. Redactions have a local echo
-     * which is undone in this scenario.
-     *
-     * @param event - The matrix redaction event that was cancelled.
-     * @param room - The room containing the unredacted event
-     */
-    [RoomEvent.RedactionCancelled]: (event: MatrixEvent, room: Room) => void;
-    /**
-     * Fires when the status of a transmitted event is updated.
-     *
-     * <p>When an event is first transmitted, a temporary copy of the event is
-     * inserted into the timeline, with a temporary event id, and a status of
-     * 'SENDING'.
-     *
-     * <p>Once the echo comes back from the server, the content of the event
-     * (MatrixEvent.event) is replaced by the complete event from the homeserver,
-     * thus updating its event id, as well as server-generated fields such as the
-     * timestamp. Its status is set to null.
-     *
-     * <p>Once the /send request completes, if the remote echo has not already
-     * arrived, the event is updated with a new event id and the status is set to
-     * 'SENT'. The server-generated fields are of course not updated yet.
-     *
-     * <p>If the /send fails, In this case, the event's status is set to
-     * 'NOT_SENT'. If it is later resent, the process starts again, setting the
-     * status to 'SENDING'. Alternatively, the message may be cancelled, which
-     * removes the event from the room, and sets the status to 'CANCELLED'.
-     *
-     * <p>This event is raised to reflect each of the transitions above.
-     *
-     * @param event - The matrix event which has been updated
-     *
-     * @param room - The room containing the redacted event
-     *
-     * @param oldEventId - The previous event id (the temporary event id,
-     *    except when updating a successfully-sent event when its echo arrives)
-     *
-     * @param oldStatus - The previous event status.
-     */
-    [RoomEvent.LocalEchoUpdated]: (
-        event: MatrixEvent,
-        room: Room,
-        oldEventId?: string,
-        oldStatus?: EventStatus | null,
-    ) => void;
-    [RoomEvent.OldStateUpdated]: (room: Room, previousRoomState: RoomState, roomState: RoomState) => void;
-    [RoomEvent.CurrentStateUpdated]: (room: Room, previousRoomState: RoomState, roomState: RoomState) => void;
-    [RoomEvent.HistoryImportedWithinTimeline]: (markerEvent: MatrixEvent, room: Room) => void;
-    [RoomEvent.UnreadNotifications]: (unreadNotifications?: NotificationCount, threadId?: string) => void;
-    [RoomEvent.TimelineRefresh]: (room: Room, eventTimelineSet: EventTimelineSet) => void;
-    [ThreadEvent.New]: (thread: Thread, toStartOfTimeline: boolean) => void;
-    /**
-     * Fires when a new poll instance is added to the room state
-     * @param poll - the new poll
-     */
-    [PollEvent.New]: (poll: Poll) => void;
-} & Pick<ThreadHandlerMap, ThreadEvent.Update | ThreadEvent.NewReply | ThreadEvent.Delete> &
-    EventTimelineSetHandlerMap &
-    Pick<MatrixEventHandlerMap, MatrixEventEvent.BeforeRedaction> &
-    Pick<
-        RoomStateEventHandlerMap,
-        | RoomStateEvent.Events
-        | RoomStateEvent.Members
-        | RoomStateEvent.NewMember
-        | RoomStateEvent.Update
-        | RoomStateEvent.Marker
-        | BeaconEvent.New
-    > &
-    Pick<BeaconEventHandlerMap, BeaconEvent.Update | BeaconEvent.Destroy | BeaconEvent.LivenessChange>;
-
-export class Room extends ReadReceipt<RoomEmittedEvents, RoomEventHandlerMap> {
-    public readonly reEmitter: TypedReEmitter<RoomEmittedEvents, RoomEventHandlerMap>;
-    private txnToEvent: Map<string, MatrixEvent> = new Map(); // Pending in-flight requests { string: MatrixEvent }
-    private notificationCounts: NotificationCount = {};
-    private readonly threadNotifications = new Map<string, NotificationCount>();
-    public readonly cachedThreadReadReceipts = new Map<string, CachedReceiptStructure[]>();
-    // Useful to know at what point the current user has started using threads in this room
-    private oldestThreadedReceiptTs = Infinity;
-    /**
-     * A record of the latest unthread receipts per user
-     * This is useful in determining whether a user has read a thread or not
-     */
-    private unthreadedReceipts = new Map<string, Receipt>();
-    private readonly timelineSets: EventTimelineSet[];
-    public readonly polls: Map<string, Poll> = new Map<string, Poll>();
-    public readonly threadsTimelineSets: EventTimelineSet[] = [];
-    // any filtered timeline sets we're maintaining for this room
-    private readonly filteredTimelineSets: Record<string, EventTimelineSet> = {}; // filter_id: timelineSet
-    private timelineNeedsRefresh = false;
-    private readonly pendingEventList?: MatrixEvent[];
-    // read by megolm via getter; boolean value - null indicates "use global value"
-    private blacklistUnverifiedDevices?: boolean;
-    private selfMembership?: string;
-    private summaryHeroes: string[] | null = null;
-    // flags to stop logspam about missing m.room.create events
-    private getTypeWarning = false;
-    private getVersionWarning = false;
-    private membersPromise?: Promise<boolean>;
-
-    // XXX: These should be read-only
-    /**
-     * The human-readable display name for this room.
-     */
-    public name: string;
-    /**
-     * The un-homoglyphed name for this room.
-     */
-    public normalizedName: string;
-    /**
-     * Dict of room tags; the keys are the tag name and the values
-     * are any metadata associated with the tag - e.g. `{ "fav" : { order: 1 } }`
-     */
-    public tags: Record<string, Record<string, any>> = {}; // $tagName: { $metadata: $value }
-    /**
-     * accountData Dict of per-room account_data events; the keys are the
-     * event type and the values are the events.
-     */
-    public accountData: Map<string, MatrixEvent> = new Map(); // $eventType: $event
-    /**
-     * The room summary.
-     */
-    public summary: RoomSummary | null = null;
-    // legacy fields
-    /**
-     * The live event timeline for this room, with the oldest event at index 0.
-     * Present for backwards compatibility - prefer getLiveTimeline().getEvents()
-     */
-    public timeline!: MatrixEvent[];
-    /**
-     * oldState The state of the room at the time of the oldest
-     * event in the live timeline. Present for backwards compatibility -
-     * prefer getLiveTimeline().getState(EventTimeline.BACKWARDS).
-     */
-    public oldState!: RoomState;
-    /**
-     * currentState The state of the room at the time of the
-     * newest event in the timeline. Present for backwards compatibility -
-     * prefer getLiveTimeline().getState(EventTimeline.FORWARDS).
-     */
-    public currentState!: RoomState;
-    public readonly relations = new RelationsContainer(this.client, this);
-
-    /**
-     * A collection of events known by the client
-     * This is not a comprehensive list of the threads that exist in this room
-     */
-    private threads = new Map<string, Thread>();
-    public lastThread?: Thread;
-
-    /**
-     * A mapping of eventId to all visibility changes to apply
-     * to the event, by chronological order, as per
-     * https://github.com/matrix-org/matrix-doc/pull/3531
-     *
-     * # Invariants
-     *
-     * - within each list, all events are classed by
-     *   chronological order;
-     * - all events are events such that
-     *  `asVisibilityEvent()` returns a non-null `IVisibilityChange`;
-     * - within each list with key `eventId`, all events
-     *   are in relation to `eventId`.
-     *
-     * @experimental
-     */
-    private visibilityEvents = new Map<string, MatrixEvent[]>();
-
-    /**
-     * Construct a new Room.
-     *
-     * <p>For a room, we store an ordered sequence of timelines, which may or may not
-     * be continuous. Each timeline lists a series of events, as well as tracking
-     * the room state at the start and the end of the timeline. It also tracks
-     * forward and backward pagination tokens, as well as containing links to the
-     * next timeline in the sequence.
-     *
-     * <p>There is one special timeline - the 'live' timeline, which represents the
-     * timeline to which events are being added in real-time as they are received
-     * from the /sync API. Note that you should not retain references to this
-     * timeline - even if it is the current timeline right now, it may not remain
-     * so if the server gives us a timeline gap in /sync.
-     *
-     * <p>In order that we can find events from their ids later, we also maintain a
-     * map from event_id to timeline and index.
-     *
-     * @param roomId - Required. The ID of this room.
-     * @param client - Required. The client, used to lazy load members.
-     * @param myUserId - Required. The ID of the syncing user.
-     * @param opts - Configuration options
-     */
-    public constructor(
-        public readonly roomId: string,
-        public readonly client: MatrixClient,
-        public readonly myUserId: string,
-        private readonly opts: IOpts = {},
-    ) {
-        super();
-        // In some cases, we add listeners for every displayed Matrix event, so it's
-        // common to have quite a few more than the default limit.
-        this.setMaxListeners(100);
-        this.reEmitter = new TypedReEmitter(this);
-
-        opts.pendingEventOrdering = opts.pendingEventOrdering || PendingEventOrdering.Chronological;
-
-        this.name = roomId;
-        this.normalizedName = roomId;
-
-        // all our per-room timeline sets. the first one is the unfiltered ones;
-        // the subsequent ones are the filtered ones in no particular order.
-        this.timelineSets = [new EventTimelineSet(this, opts)];
-        this.reEmitter.reEmit(this.getUnfilteredTimelineSet(), [RoomEvent.Timeline, RoomEvent.TimelineReset]);
-
-        this.fixUpLegacyTimelineFields();
-
-        if (this.opts.pendingEventOrdering === PendingEventOrdering.Detached) {
-            this.pendingEventList = [];
-            this.client.store.getPendingEvents(this.roomId).then((events) => {
-                const mapper = this.client.getEventMapper({
-                    toDevice: false,
-                    decrypt: false,
-                });
-                events.forEach(async (serializedEvent: Partial<IEvent>) => {
-                    const event = mapper(serializedEvent);
-                    await client.decryptEventIfNeeded(event);
-                    event.setStatus(EventStatus.NOT_SENT);
-                    this.addPendingEvent(event, event.getTxnId()!);
-                });
-            });
-        }
-
-        // awaited by getEncryptionTargetMembers while room members are loading
-        if (!this.opts.lazyLoadMembers) {
-            this.membersPromise = Promise.resolve(false);
-        } else {
-            this.membersPromise = undefined;
-        }
-    }
-
-    private threadTimelineSetsPromise: Promise<[EventTimelineSet, EventTimelineSet]> | null = null;
-    public async createThreadsTimelineSets(): Promise<[EventTimelineSet, EventTimelineSet] | null> {
-        if (this.threadTimelineSetsPromise) {
-            return this.threadTimelineSetsPromise;
-        }
-
-        if (this.client?.supportsThreads()) {
-            try {
-                this.threadTimelineSetsPromise = Promise.all([
-                    this.createThreadTimelineSet(),
-                    this.createThreadTimelineSet(ThreadFilterType.My),
-                ]);
-                const timelineSets = await this.threadTimelineSetsPromise;
-                this.threadsTimelineSets.push(...timelineSets);
-                return timelineSets;
-            } catch (e) {
-                this.threadTimelineSetsPromise = null;
-                return null;
-            }
-        }
-        return null;
-    }
-
-    /**
-     * Bulk decrypt critical events in a room
-     *
-     * Critical events represents the minimal set of events to decrypt
-     * for a typical UI to function properly
-     *
-     * - Last event of every room (to generate likely message preview)
-     * - All events up to the read receipt (to calculate an accurate notification count)
-     *
-     * @returns Signals when all events have been decrypted
-     */
-    public async decryptCriticalEvents(): Promise<void> {
-        if (!this.client.isCryptoEnabled()) return;
-
-        const readReceiptEventId = this.getEventReadUpTo(this.client.getUserId()!, true);
-        const events = this.getLiveTimeline().getEvents();
-        const readReceiptTimelineIndex = events.findIndex((matrixEvent) => {
-            return matrixEvent.event.event_id === readReceiptEventId;
-        });
-
-        const decryptionPromises = events
-            .slice(readReceiptTimelineIndex)
-            .reverse()
-            .map((event) => this.client.decryptEventIfNeeded(event, { isRetry: true }));
-
-        await Promise.allSettled(decryptionPromises);
-    }
-
-    /**
-     * Bulk decrypt events in a room
-     *
-     * @returns Signals when all events have been decrypted
-     */
-    public async decryptAllEvents(): Promise<void> {
-        if (!this.client.isCryptoEnabled()) return;
-
-        const decryptionPromises = this.getUnfilteredTimelineSet()
-            .getLiveTimeline()
-            .getEvents()
-            .slice(0) // copy before reversing
-            .reverse()
-            .map((event) => this.client.decryptEventIfNeeded(event, { isRetry: true }));
-
-        await Promise.allSettled(decryptionPromises);
-    }
-
-    /**
-     * Gets the creator of the room
-     * @returns The creator of the room, or null if it could not be determined
-     */
-    public getCreator(): string | null {
-        const createEvent = this.currentState.getStateEvents(EventType.RoomCreate, "");
-        return createEvent?.getContent()["creator"] ?? null;
-    }
-
-    /**
-     * Gets the version of the room
-     * @returns The version of the room, or null if it could not be determined
-     */
-    public getVersion(): string {
-        const createEvent = this.currentState.getStateEvents(EventType.RoomCreate, "");
-        if (!createEvent) {
-            if (!this.getVersionWarning) {
-                logger.warn("[getVersion] Room " + this.roomId + " does not have an m.room.create event");
-                this.getVersionWarning = true;
-            }
-            return "1";
-        }
-        return createEvent.getContent()["room_version"] ?? "1";
-    }
-
-    /**
-     * Determines whether this room needs to be upgraded to a new version
-     * @returns What version the room should be upgraded to, or null if
-     *     the room does not require upgrading at this time.
-     * @deprecated Use #getRecommendedVersion() instead
-     */
-    public shouldUpgradeToVersion(): string | null {
-        // TODO: Remove this function.
-        // This makes assumptions about which versions are safe, and can easily
-        // be wrong. Instead, people are encouraged to use getRecommendedVersion
-        // which determines a safer value. This function doesn't use that function
-        // because this is not async-capable, and to avoid breaking the contract
-        // we're deprecating this.
-
-        if (!SAFE_ROOM_VERSIONS.includes(this.getVersion())) {
-            return KNOWN_SAFE_ROOM_VERSION;
-        }
-
-        return null;
-    }
-
-    /**
-     * Determines the recommended room version for the room. This returns an
-     * object with 3 properties: `version` as the new version the
-     * room should be upgraded to (may be the same as the current version);
-     * `needsUpgrade` to indicate if the room actually can be
-     * upgraded (ie: does the current version not match?); and `urgent`
-     * to indicate if the new version patches a vulnerability in a previous
-     * version.
-     * @returns
-     * Resolves to the version the room should be upgraded to.
-     */
-    public async getRecommendedVersion(): Promise<IRecommendedVersion> {
-        const capabilities = await this.client.getCapabilities();
-        let versionCap = capabilities["m.room_versions"];
-        if (!versionCap) {
-            versionCap = {
-                default: KNOWN_SAFE_ROOM_VERSION,
-                available: {},
-            };
-            for (const safeVer of SAFE_ROOM_VERSIONS) {
-                versionCap.available[safeVer] = RoomVersionStability.Stable;
-            }
-        }
-
-        let result = this.checkVersionAgainstCapability(versionCap);
-        if (result.urgent && result.needsUpgrade) {
-            // Something doesn't feel right: we shouldn't need to update
-            // because the version we're on should be in the protocol's
-            // namespace. This usually means that the server was updated
-            // before the client was, making us think the newest possible
-            // room version is not stable. As a solution, we'll refresh
-            // the capability we're using to determine this.
-            logger.warn(
-                "Refreshing room version capability because the server looks " +
-                    "to be supporting a newer room version we don't know about.",
-            );
-
-            const caps = await this.client.getCapabilities(true);
-            versionCap = caps["m.room_versions"];
-            if (!versionCap) {
-                logger.warn("No room version capability - assuming upgrade required.");
-                return result;
-            } else {
-                result = this.checkVersionAgainstCapability(versionCap);
-            }
-        }
-
-        return result;
-    }
-
-    private checkVersionAgainstCapability(versionCap: IRoomVersionsCapability): IRecommendedVersion {
-        const currentVersion = this.getVersion();
-        logger.log(`[${this.roomId}] Current version: ${currentVersion}`);
-        logger.log(`[${this.roomId}] Version capability: `, versionCap);
-
-        const result: IRecommendedVersion = {
-            version: currentVersion,
-            needsUpgrade: false,
-            urgent: false,
-        };
-
-        // If the room is on the default version then nothing needs to change
-        if (currentVersion === versionCap.default) return result;
-
-        const stableVersions = Object.keys(versionCap.available).filter((v) => versionCap.available[v] === "stable");
-
-        // Check if the room is on an unstable version. We determine urgency based
-        // off the version being in the Matrix spec namespace or not (if the version
-        // is in the current namespace and unstable, the room is probably vulnerable).
-        if (!stableVersions.includes(currentVersion)) {
-            result.version = versionCap.default;
-            result.needsUpgrade = true;
-            result.urgent = !!this.getVersion().match(/^[0-9]+[0-9.]*$/g);
-            if (result.urgent) {
-                logger.warn(`URGENT upgrade required on ${this.roomId}`);
-            } else {
-                logger.warn(`Non-urgent upgrade required on ${this.roomId}`);
-            }
-            return result;
-        }
-
-        // The room is on a stable, but non-default, version by this point.
-        // No upgrade needed.
-        return result;
-    }
-
-    /**
-     * Determines whether the given user is permitted to perform a room upgrade
-     * @param userId - The ID of the user to test against
-     * @returns True if the given user is permitted to upgrade the room
-     */
-    public userMayUpgradeRoom(userId: string): boolean {
-        return this.currentState.maySendStateEvent(EventType.RoomTombstone, userId);
-    }
-
-    /**
-     * Get the list of pending sent events for this room
-     *
-     * @returns A list of the sent events
-     * waiting for remote echo.
-     *
-     * @throws If `opts.pendingEventOrdering` was not 'detached'
-     */
-    public getPendingEvents(): MatrixEvent[] {
-        if (!this.pendingEventList) {
-            throw new Error(
-                "Cannot call getPendingEvents with pendingEventOrdering == " + this.opts.pendingEventOrdering,
-            );
-        }
-
-        return this.pendingEventList;
-    }
-
-    /**
-     * Removes a pending event for this room
-     *
-     * @returns True if an element was removed.
-     */
-    public removePendingEvent(eventId: string): boolean {
-        if (!this.pendingEventList) {
-            throw new Error(
-                "Cannot call removePendingEvent with pendingEventOrdering == " + this.opts.pendingEventOrdering,
-            );
-        }
-
-        const removed = utils.removeElement(
-            this.pendingEventList,
-            function (ev) {
-                return ev.getId() == eventId;
-            },
-            false,
-        );
-
-        this.savePendingEvents();
-
-        return removed;
-    }
-
-    /**
-     * Check whether the pending event list contains a given event by ID.
-     * If pending event ordering is not "detached" then this returns false.
-     *
-     * @param eventId - The event ID to check for.
-     */
-    public hasPendingEvent(eventId: string): boolean {
-        return this.pendingEventList?.some((event) => event.getId() === eventId) ?? false;
-    }
-
-    /**
-     * Get a specific event from the pending event list, if configured, null otherwise.
-     *
-     * @param eventId - The event ID to check for.
-     */
-    public getPendingEvent(eventId: string): MatrixEvent | null {
-        return this.pendingEventList?.find((event) => event.getId() === eventId) ?? null;
-    }
-
-    /**
-     * Get the live unfiltered timeline for this room.
-     *
-     * @returns live timeline
-     */
-    public getLiveTimeline(): EventTimeline {
-        return this.getUnfilteredTimelineSet().getLiveTimeline();
-    }
-
-    /**
-     * Get the timestamp of the last message in the room
-     *
-     * @returns the timestamp of the last message in the room
-     */
-    public getLastActiveTimestamp(): number {
-        const timeline = this.getLiveTimeline();
-        const events = timeline.getEvents();
-        if (events.length) {
-            const lastEvent = events[events.length - 1];
-            return lastEvent.getTs();
-        } else {
-            return Number.MIN_SAFE_INTEGER;
-        }
-    }
-
-    /**
-     * @returns the membership type (join | leave | invite) for the logged in user
-     */
-    public getMyMembership(): string {
-        return this.selfMembership ?? "leave";
-    }
-
-    /**
-     * If this room is a DM we're invited to,
-     * try to find out who invited us
-     * @returns user id of the inviter
-     */
-    public getDMInviter(): string | undefined {
-        const me = this.getMember(this.myUserId);
-        if (me) {
-            return me.getDMInviter();
-        }
-
-        if (this.selfMembership === "invite") {
-            // fall back to summary information
-            const memberCount = this.getInvitedAndJoinedMemberCount();
-            if (memberCount === 2) {
-                return this.summaryHeroes?.[0];
-            }
-        }
-    }
-
-    /**
-     * Assuming this room is a DM room, tries to guess with which user.
-     * @returns user id of the other member (could be syncing user)
-     */
-    public guessDMUserId(): string {
-        const me = this.getMember(this.myUserId);
-        if (me) {
-            const inviterId = me.getDMInviter();
-            if (inviterId) {
-                return inviterId;
-            }
-        }
-        // Remember, we're assuming this room is a DM, so returning the first member we find should be fine
-        if (Array.isArray(this.summaryHeroes) && this.summaryHeroes.length) {
-            return this.summaryHeroes[0];
-        }
-        const members = this.currentState.getMembers();
-        const anyMember = members.find((m) => m.userId !== this.myUserId);
-        if (anyMember) {
-            return anyMember.userId;
-        }
-        // it really seems like I'm the only user in the room
-        // so I probably created a room with just me in it
-        // and marked it as a DM. Ok then
-        return this.myUserId;
-    }
-
-    public getAvatarFallbackMember(): RoomMember | undefined {
-        const memberCount = this.getInvitedAndJoinedMemberCount();
-        if (memberCount > 2) {
-            return;
-        }
-        const hasHeroes = Array.isArray(this.summaryHeroes) && this.summaryHeroes.length;
-        if (hasHeroes) {
-            const availableMember = this.summaryHeroes!.map((userId) => {
-                return this.getMember(userId);
-            }).find((member) => !!member);
-            if (availableMember) {
-                return availableMember;
-            }
-        }
-        const members = this.currentState.getMembers();
-        // could be different than memberCount
-        // as this includes left members
-        if (members.length <= 2) {
-            const availableMember = members.find((m) => {
-                return m.userId !== this.myUserId;
-            });
-            if (availableMember) {
-                return availableMember;
-            }
-        }
-        // if all else fails, try falling back to a user,
-        // and create a one-off member for it
-        if (hasHeroes) {
-            const availableUser = this.summaryHeroes!.map((userId) => {
-                return this.client.getUser(userId);
-            }).find((user) => !!user);
-            if (availableUser) {
-                const member = new RoomMember(this.roomId, availableUser.userId);
-                member.user = availableUser;
-                return member;
-            }
-        }
-    }
-
-    /**
-     * Sets the membership this room was received as during sync
-     * @param membership - join | leave | invite
-     */
-    public updateMyMembership(membership: string): void {
-        const prevMembership = this.selfMembership;
-        this.selfMembership = membership;
-        if (prevMembership !== membership) {
-            if (membership === "leave") {
-                this.cleanupAfterLeaving();
-            }
-            this.emit(RoomEvent.MyMembership, this, membership, prevMembership);
-        }
-    }
-
-    private async loadMembersFromServer(): Promise<IStateEventWithRoomId[]> {
-        const lastSyncToken = this.client.store.getSyncToken();
-        const response = await this.client.members(this.roomId, undefined, "leave", lastSyncToken ?? undefined);
-        return response.chunk;
-    }
-
-    private async loadMembers(): Promise<{ memberEvents: MatrixEvent[]; fromServer: boolean }> {
-        // were the members loaded from the server?
-        let fromServer = false;
-        let rawMembersEvents = await this.client.store.getOutOfBandMembers(this.roomId);
-        // If the room is encrypted, we always fetch members from the server at
-        // least once, in case the latest state wasn't persisted properly. Note
-        // that this function is only called once (unless loading the members
-        // fails), since loadMembersIfNeeded always returns this.membersPromise
-        // if set, which will be the result of the first (successful) call.
-        if (rawMembersEvents === null || (this.client.isCryptoEnabled() && this.client.isRoomEncrypted(this.roomId))) {
-            fromServer = true;
-            rawMembersEvents = await this.loadMembersFromServer();
-            logger.log(`LL: got ${rawMembersEvents.length} ` + `members from server for room ${this.roomId}`);
-        }
-        const memberEvents = rawMembersEvents.filter(noUnsafeEventProps).map(this.client.getEventMapper());
-        return { memberEvents, fromServer };
-    }
-
-    /**
-     * Check if loading of out-of-band-members has completed
-     *
-     * @returns true if the full membership list of this room has been loaded (including if lazy-loading is disabled).
-     *    False if the load is not started or is in progress.
-     */
-    public membersLoaded(): boolean {
-        if (!this.opts.lazyLoadMembers) {
-            return true;
-        }
-
-        return this.currentState.outOfBandMembersReady();
-    }
-
-    /**
-     * Preloads the member list in case lazy loading
-     * of memberships is in use. Can be called multiple times,
-     * it will only preload once.
-     * @returns when preloading is done and
-     * accessing the members on the room will take
-     * all members in the room into account
-     */
-    public loadMembersIfNeeded(): Promise<boolean> {
-        if (this.membersPromise) {
-            return this.membersPromise;
-        }
-
-        // mark the state so that incoming messages while
-        // the request is in flight get marked as superseding
-        // the OOB members
-        this.currentState.markOutOfBandMembersStarted();
-
-        const inMemoryUpdate = this.loadMembers()
-            .then((result) => {
-                this.currentState.setOutOfBandMembers(result.memberEvents);
-                return result.fromServer;
-            })
-            .catch((err) => {
-                // allow retries on fail
-                this.membersPromise = undefined;
-                this.currentState.markOutOfBandMembersFailed();
-                throw err;
-            });
-        // update members in storage, but don't wait for it
-        inMemoryUpdate
-            .then((fromServer) => {
-                if (fromServer) {
-                    const oobMembers = this.currentState
-                        .getMembers()
-                        .filter((m) => m.isOutOfBand())
-                        .map((m) => m.events.member?.event as IStateEventWithRoomId);
-                    logger.log(`LL: telling store to write ${oobMembers.length}` + ` members for room ${this.roomId}`);
-                    const store = this.client.store;
-                    return (
-                        store
-                            .setOutOfBandMembers(this.roomId, oobMembers)
-                            // swallow any IDB error as we don't want to fail
-                            // because of this
-                            .catch((err) => {
-                                logger.log("LL: storing OOB room members failed, oh well", err);
-                            })
-                    );
-                }
-            })
-            .catch((err) => {
-                // as this is not awaited anywhere,
-                // at least show the error in the console
-                logger.error(err);
-            });
-
-        this.membersPromise = inMemoryUpdate;
-
-        return this.membersPromise;
-    }
-
-    /**
-     * Removes the lazily loaded members from storage if needed
-     */
-    public async clearLoadedMembersIfNeeded(): Promise<void> {
-        if (this.opts.lazyLoadMembers && this.membersPromise) {
-            await this.loadMembersIfNeeded();
-            await this.client.store.clearOutOfBandMembers(this.roomId);
-            this.currentState.clearOutOfBandMembers();
-            this.membersPromise = undefined;
-        }
-    }
-
-    /**
-     * called when sync receives this room in the leave section
-     * to do cleanup after leaving a room. Possibly called multiple times.
-     */
-    private cleanupAfterLeaving(): void {
-        this.clearLoadedMembersIfNeeded().catch((err) => {
-            logger.error(`error after clearing loaded members from ` + `room ${this.roomId} after leaving`);
-            logger.log(err);
-        });
-    }
-
-    /**
-     * Empty out the current live timeline and re-request it. This is used when
-     * historical messages are imported into the room via MSC2716 `/batch_send`
-     * because the client may already have that section of the timeline loaded.
-     * We need to force the client to throw away their current timeline so that
-     * when they back paginate over the area again with the historical messages
-     * in between, it grabs the newly imported messages. We can listen for
-     * `UNSTABLE_MSC2716_MARKER`, in order to tell when historical messages are ready
-     * to be discovered in the room and the timeline needs a refresh. The SDK
-     * emits a `RoomEvent.HistoryImportedWithinTimeline` event when we detect a
-     * valid marker and can check the needs refresh status via
-     * `room.getTimelineNeedsRefresh()`.
-     */
-    public async refreshLiveTimeline(): Promise<void> {
-        const liveTimelineBefore = this.getLiveTimeline();
-        const forwardPaginationToken = liveTimelineBefore.getPaginationToken(EventTimeline.FORWARDS);
-        const backwardPaginationToken = liveTimelineBefore.getPaginationToken(EventTimeline.BACKWARDS);
-        const eventsBefore = liveTimelineBefore.getEvents();
-        const mostRecentEventInTimeline = eventsBefore[eventsBefore.length - 1];
-        logger.log(
-            `[refreshLiveTimeline for ${this.roomId}] at ` +
-                `mostRecentEventInTimeline=${mostRecentEventInTimeline && mostRecentEventInTimeline.getId()} ` +
-                `liveTimelineBefore=${liveTimelineBefore.toString()} ` +
-                `forwardPaginationToken=${forwardPaginationToken} ` +
-                `backwardPaginationToken=${backwardPaginationToken}`,
-        );
-
-        // Get the main TimelineSet
-        const timelineSet = this.getUnfilteredTimelineSet();
-
-        let newTimeline: Optional<EventTimeline>;
-        // If there isn't any event in the timeline, let's go fetch the latest
-        // event and construct a timeline from it.
-        //
-        // This should only really happen if the user ran into an error
-        // with refreshing the timeline before which left them in a blank
-        // timeline from `resetLiveTimeline`.
-        if (!mostRecentEventInTimeline) {
-            newTimeline = await this.client.getLatestTimeline(timelineSet);
-        } else {
-            // Empty out all of `this.timelineSets`. But we also need to keep the
-            // same `timelineSet` references around so the React code updates
-            // properly and doesn't ignore the room events we emit because it checks
-            // that the `timelineSet` references are the same. We need the
-            // `timelineSet` empty so that the `client.getEventTimeline(...)` call
-            // later, will call `/context` and create a new timeline instead of
-            // returning the same one.
-            this.resetLiveTimeline(null, null);
-
-            // Make the UI timeline show the new blank live timeline we just
-            // reset so that if the network fails below it's showing the
-            // accurate state of what we're working with instead of the
-            // disconnected one in the TimelineWindow which is just hanging
-            // around by reference.
-            this.emit(RoomEvent.TimelineRefresh, this, timelineSet);
-
-            // Use `client.getEventTimeline(...)` to construct a new timeline from a
-            // `/context` response state and events for the most recent event before
-            // we reset everything. The `timelineSet` we pass in needs to be empty
-            // in order for this function to call `/context` and generate a new
-            // timeline.
-            newTimeline = await this.client.getEventTimeline(timelineSet, mostRecentEventInTimeline.getId()!);
-        }
-
-        // If a racing `/sync` beat us to creating a new timeline, use that
-        // instead because it's the latest in the room and any new messages in
-        // the scrollback will include the history.
-        const liveTimeline = timelineSet.getLiveTimeline();
-        if (
-            !liveTimeline ||
-            (liveTimeline.getPaginationToken(Direction.Forward) === null &&
-                liveTimeline.getPaginationToken(Direction.Backward) === null &&
-                liveTimeline.getEvents().length === 0)
-        ) {
-            logger.log(`[refreshLiveTimeline for ${this.roomId}] using our new live timeline`);
-            // Set the pagination token back to the live sync token (`null`) instead
-            // of using the `/context` historical token (ex. `t12-13_0_0_0_0_0_0_0_0`)
-            // so that it matches the next response from `/sync` and we can properly
-            // continue the timeline.
-            newTimeline!.setPaginationToken(forwardPaginationToken, EventTimeline.FORWARDS);
-
-            // Set our new fresh timeline as the live timeline to continue syncing
-            // forwards and back paginating from.
-            timelineSet.setLiveTimeline(newTimeline!);
-            // Fixup `this.oldstate` so that `scrollback` has the pagination tokens
-            // available
-            this.fixUpLegacyTimelineFields();
-        } else {
-            logger.log(
-                `[refreshLiveTimeline for ${this.roomId}] \`/sync\` or some other request beat us to creating a new ` +
-                    `live timeline after we reset it. We'll use that instead since any events in the scrollback from ` +
-                    `this timeline will include the history.`,
-            );
-        }
-
-        // The timeline has now been refreshed ✅
-        this.setTimelineNeedsRefresh(false);
-
-        // Emit an event which clients can react to and re-load the timeline
-        // from the SDK
-        this.emit(RoomEvent.TimelineRefresh, this, timelineSet);
-    }
-
-    /**
-     * Reset the live timeline of all timelineSets, and start new ones.
-     *
-     * <p>This is used when /sync returns a 'limited' timeline.
-     *
-     * @param backPaginationToken -   token for back-paginating the new timeline
-     * @param forwardPaginationToken - token for forward-paginating the old live timeline,
-     * if absent or null, all timelines are reset, removing old ones (including the previous live
-     * timeline which would otherwise be unable to paginate forwards without this token).
-     * Removing just the old live timeline whilst preserving previous ones is not supported.
-     */
-    public resetLiveTimeline(backPaginationToken?: string | null, forwardPaginationToken?: string | null): void {
-        for (const timelineSet of this.timelineSets) {
-            timelineSet.resetLiveTimeline(backPaginationToken ?? undefined, forwardPaginationToken ?? undefined);
-        }
-        for (const thread of this.threads.values()) {
-            thread.resetLiveTimeline(backPaginationToken, forwardPaginationToken);
-        }
-
-        this.fixUpLegacyTimelineFields();
-    }
-
-    /**
-     * Fix up this.timeline, this.oldState and this.currentState
-     *
-     * @internal
-     */
-    private fixUpLegacyTimelineFields(): void {
-        const previousOldState = this.oldState;
-        const previousCurrentState = this.currentState;
-
-        // maintain this.timeline as a reference to the live timeline,
-        // and this.oldState and this.currentState as references to the
-        // state at the start and end of that timeline. These are more
-        // for backwards-compatibility than anything else.
-        this.timeline = this.getLiveTimeline().getEvents();
-        this.oldState = this.getLiveTimeline().getState(EventTimeline.BACKWARDS)!;
-        this.currentState = this.getLiveTimeline().getState(EventTimeline.FORWARDS)!;
-
-        // Let people know to register new listeners for the new state
-        // references. The reference won't necessarily change every time so only
-        // emit when we see a change.
-        if (previousOldState !== this.oldState) {
-            this.emit(RoomEvent.OldStateUpdated, this, previousOldState, this.oldState);
-        }
-
-        if (previousCurrentState !== this.currentState) {
-            this.emit(RoomEvent.CurrentStateUpdated, this, previousCurrentState, this.currentState);
-
-            // Re-emit various events on the current room state
-            // TODO: If currentState really only exists for backwards
-            // compatibility, shouldn't we be doing this some other way?
-            this.reEmitter.stopReEmitting(previousCurrentState, [
-                RoomStateEvent.Events,
-                RoomStateEvent.Members,
-                RoomStateEvent.NewMember,
-                RoomStateEvent.Update,
-                RoomStateEvent.Marker,
-                BeaconEvent.New,
-                BeaconEvent.Update,
-                BeaconEvent.Destroy,
-                BeaconEvent.LivenessChange,
-            ]);
-            this.reEmitter.reEmit(this.currentState, [
-                RoomStateEvent.Events,
-                RoomStateEvent.Members,
-                RoomStateEvent.NewMember,
-                RoomStateEvent.Update,
-                RoomStateEvent.Marker,
-                BeaconEvent.New,
-                BeaconEvent.Update,
-                BeaconEvent.Destroy,
-                BeaconEvent.LivenessChange,
-            ]);
-        }
-    }
-
-    /**
-     * Returns whether there are any devices in the room that are unverified
-     *
-     * Note: Callers should first check if crypto is enabled on this device. If it is
-     * disabled, then we aren't tracking room devices at all, so we can't answer this, and an
-     * error will be thrown.
-     *
-     * @returns the result
-     */
-    public async hasUnverifiedDevices(): Promise<boolean> {
-        if (!this.client.isRoomEncrypted(this.roomId)) {
-            return false;
-        }
-        const e2eMembers = await this.getEncryptionTargetMembers();
-        for (const member of e2eMembers) {
-            const devices = this.client.getStoredDevicesForUser(member.userId);
-            if (devices.some((device) => device.isUnverified())) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    /**
-     * Return the timeline sets for this room.
-     * @returns array of timeline sets for this room
-     */
-    public getTimelineSets(): EventTimelineSet[] {
-        return this.timelineSets;
-    }
-
-    /**
-     * Helper to return the main unfiltered timeline set for this room
-     * @returns room's unfiltered timeline set
-     */
-    public getUnfilteredTimelineSet(): EventTimelineSet {
-        return this.timelineSets[0];
-    }
-
-    /**
-     * Get the timeline which contains the given event from the unfiltered set, if any
-     *
-     * @param eventId -  event ID to look for
-     * @returns timeline containing
-     * the given event, or null if unknown
-     */
-    public getTimelineForEvent(eventId: string): EventTimeline | null {
-        const event = this.findEventById(eventId);
-        const thread = this.findThreadForEvent(event);
-        if (thread) {
-            return thread.timelineSet.getTimelineForEvent(eventId);
-        } else {
-            return this.getUnfilteredTimelineSet().getTimelineForEvent(eventId);
-        }
-    }
-
-    /**
-     * Add a new timeline to this room's unfiltered timeline set
-     *
-     * @returns newly-created timeline
-     */
-    public addTimeline(): EventTimeline {
-        return this.getUnfilteredTimelineSet().addTimeline();
-    }
-
-    /**
-     * Whether the timeline needs to be refreshed in order to pull in new
-     * historical messages that were imported.
-     * @param value - The value to set
-     */
-    public setTimelineNeedsRefresh(value: boolean): void {
-        this.timelineNeedsRefresh = value;
-    }
-
-    /**
-     * Whether the timeline needs to be refreshed in order to pull in new
-     * historical messages that were imported.
-     * @returns .
-     */
-    public getTimelineNeedsRefresh(): boolean {
-        return this.timelineNeedsRefresh;
-    }
-
-    /**
-     * Get an event which is stored in our unfiltered timeline set, or in a thread
-     *
-     * @param eventId - event ID to look for
-     * @returns the given event, or undefined if unknown
-     */
-    public findEventById(eventId: string): MatrixEvent | undefined {
-        let event = this.getUnfilteredTimelineSet().findEventById(eventId);
-
-        if (!event) {
-            const threads = this.getThreads();
-            for (let i = 0; i < threads.length; i++) {
-                const thread = threads[i];
-                event = thread.findEventById(eventId);
-                if (event) {
-                    return event;
-                }
-            }
-        }
-
-        return event;
-    }
-
-    /**
-     * Get one of the notification counts for this room
-     * @param type - The type of notification count to get. default: 'total'
-     * @returns The notification count, or undefined if there is no count
-     *                  for this type.
-     */
-    public getUnreadNotificationCount(type = NotificationCountType.Total): number {
-        let count = this.getRoomUnreadNotificationCount(type);
-        for (const threadNotification of this.threadNotifications.values()) {
-            count += threadNotification[type] ?? 0;
-        }
-        return count;
-    }
-
-    /**
-     * Get the notification for the event context (room or thread timeline)
-     */
-    public getUnreadCountForEventContext(type = NotificationCountType.Total, event: MatrixEvent): number {
-        const isThreadEvent = !!event.threadRootId && !event.isThreadRoot;
-
-        return (
-            (isThreadEvent
-                ? this.getThreadUnreadNotificationCount(event.threadRootId, type)
-                : this.getRoomUnreadNotificationCount(type)) ?? 0
-        );
-    }
-
-    /**
-     * Get one of the notification counts for this room
-     * @param type - The type of notification count to get. default: 'total'
-     * @returns The notification count, or undefined if there is no count
-     *                  for this type.
-     */
-    public getRoomUnreadNotificationCount(type = NotificationCountType.Total): number {
-        return this.notificationCounts[type] ?? 0;
-    }
-
-    /**
-     * Get one of the notification counts for a thread
-     * @param threadId - the root event ID
-     * @param type - The type of notification count to get. default: 'total'
-     * @returns The notification count, or undefined if there is no count
-     *          for this type.
-     */
-    public getThreadUnreadNotificationCount(threadId: string, type = NotificationCountType.Total): number {
-        return this.threadNotifications.get(threadId)?.[type] ?? 0;
-    }
-
-    /**
-     * Checks if the current room has unread thread notifications
-     * @returns
-     */
-    public hasThreadUnreadNotification(): boolean {
-        for (const notification of this.threadNotifications.values()) {
-            if ((notification.highlight ?? 0) > 0 || (notification.total ?? 0) > 0) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-    /**
-     * Swet one of the notification count for a thread
-     * @param threadId - the root event ID
-     * @param type - The type of notification count to get. default: 'total'
-     * @returns
-     */
-    public setThreadUnreadNotificationCount(threadId: string, type: NotificationCountType, count: number): void {
-        const notification: NotificationCount = {
-            highlight: this.threadNotifications.get(threadId)?.highlight,
-            total: this.threadNotifications.get(threadId)?.total,
-            ...{
-                [type]: count,
-            },
-        };
-
-        this.threadNotifications.set(threadId, notification);
-
-        this.emit(RoomEvent.UnreadNotifications, notification, threadId);
-    }
-
-    /**
-     * @returns the notification count type for all the threads in the room
-     */
-    public get threadsAggregateNotificationType(): NotificationCountType | null {
-        let type: NotificationCountType | null = null;
-        for (const threadNotification of this.threadNotifications.values()) {
-            if ((threadNotification.highlight ?? 0) > 0) {
-                return NotificationCountType.Highlight;
-            } else if ((threadNotification.total ?? 0) > 0 && !type) {
-                type = NotificationCountType.Total;
-            }
-        }
-        return type;
-    }
-
-    /**
-     * Resets the thread notifications for this room
-     */
-    public resetThreadUnreadNotificationCount(notificationsToKeep?: string[]): void {
-        if (notificationsToKeep) {
-            for (const [threadId] of this.threadNotifications) {
-                if (!notificationsToKeep.includes(threadId)) {
-                    this.threadNotifications.delete(threadId);
-                }
-            }
-        } else {
-            this.threadNotifications.clear();
-        }
-        this.emit(RoomEvent.UnreadNotifications);
-    }
-
-    /**
-     * Set one of the notification counts for this room
-     * @param type - The type of notification count to set.
-     * @param count - The new count
-     */
-    public setUnreadNotificationCount(type: NotificationCountType, count: number): void {
-        this.notificationCounts[type] = count;
-        this.emit(RoomEvent.UnreadNotifications, this.notificationCounts);
-    }
-
-    public setUnread(type: NotificationCountType, count: number): void {
-        return this.setUnreadNotificationCount(type, count);
-    }
-
-    public setSummary(summary: IRoomSummary): void {
-        const heroes = summary["m.heroes"];
-        const joinedCount = summary["m.joined_member_count"];
-        const invitedCount = summary["m.invited_member_count"];
-        if (Number.isInteger(joinedCount)) {
-            this.currentState.setJoinedMemberCount(joinedCount!);
-        }
-        if (Number.isInteger(invitedCount)) {
-            this.currentState.setInvitedMemberCount(invitedCount!);
-        }
-        if (Array.isArray(heroes)) {
-            // be cautious about trusting server values,
-            // and make sure heroes doesn't contain our own id
-            // just to be sure
-            this.summaryHeroes = heroes.filter((userId) => {
-                return userId !== this.myUserId;
-            });
-        }
-    }
-
-    /**
-     * Whether to send encrypted messages to devices within this room.
-     * @param value - true to blacklist unverified devices, null
-     * to use the global value for this room.
-     */
-    public setBlacklistUnverifiedDevices(value: boolean): void {
-        this.blacklistUnverifiedDevices = value;
-    }
-
-    /**
-     * Whether to send encrypted messages to devices within this room.
-     * @returns true if blacklisting unverified devices, null
-     * if the global value should be used for this room.
-     */
-    public getBlacklistUnverifiedDevices(): boolean | null {
-        if (this.blacklistUnverifiedDevices === undefined) return null;
-        return this.blacklistUnverifiedDevices;
-    }
-
-    /**
-     * Get the avatar URL for a room if one was set.
-     * @param baseUrl - The homeserver base URL. See
-     * {@link MatrixClient#getHomeserverUrl}.
-     * @param width - The desired width of the thumbnail.
-     * @param height - The desired height of the thumbnail.
-     * @param resizeMethod - The thumbnail resize method to use, either
-     * "crop" or "scale".
-     * @param allowDefault - True to allow an identicon for this room if an
-     * avatar URL wasn't explicitly set. Default: true. (Deprecated)
-     * @returns the avatar URL or null.
-     */
-    public getAvatarUrl(
-        baseUrl: string,
-        width: number,
-        height: number,
-        resizeMethod: ResizeMethod,
-        allowDefault = true,
-    ): string | null {
-        const roomAvatarEvent = this.currentState.getStateEvents(EventType.RoomAvatar, "");
-        if (!roomAvatarEvent && !allowDefault) {
-            return null;
-        }
-
-        const mainUrl = roomAvatarEvent ? roomAvatarEvent.getContent().url : null;
-        if (mainUrl) {
-            return getHttpUriForMxc(baseUrl, mainUrl, width, height, resizeMethod);
-        }
-
-        return null;
-    }
-
-    /**
-     * Get the mxc avatar url for the room, if one was set.
-     * @returns the mxc avatar url or falsy
-     */
-    public getMxcAvatarUrl(): string | null {
-        return this.currentState.getStateEvents(EventType.RoomAvatar, "")?.getContent()?.url || null;
-    }
-
-    /**
-     * Get this room's canonical alias
-     * The alias returned by this function may not necessarily
-     * still point to this room.
-     * @returns The room's canonical alias, or null if there is none
-     */
-    public getCanonicalAlias(): string | null {
-        const canonicalAlias = this.currentState.getStateEvents(EventType.RoomCanonicalAlias, "");
-        if (canonicalAlias) {
-            return canonicalAlias.getContent().alias || null;
-        }
-        return null;
-    }
-
-    /**
-     * Get this room's alternative aliases
-     * @returns The room's alternative aliases, or an empty array
-     */
-    public getAltAliases(): string[] {
-        const canonicalAlias = this.currentState.getStateEvents(EventType.RoomCanonicalAlias, "");
-        if (canonicalAlias) {
-            return canonicalAlias.getContent().alt_aliases || [];
-        }
-        return [];
-    }
-
-    /**
-     * Add events to a timeline
-     *
-     * <p>Will fire "Room.timeline" for each event added.
-     *
-     * @param events - A list of events to add.
-     *
-     * @param toStartOfTimeline -   True to add these events to the start
-     * (oldest) instead of the end (newest) of the timeline. If true, the oldest
-     * event will be the <b>last</b> element of 'events'.
-     *
-     * @param timeline -   timeline to
-     *    add events to.
-     *
-     * @param paginationToken -   token for the next batch of events
-     *
-     * @remarks
-     * Fires {@link RoomEvent.Timeline}
-     */
-    public addEventsToTimeline(
-        events: MatrixEvent[],
-        toStartOfTimeline: boolean,
-        timeline: EventTimeline,
-        paginationToken?: string,
-    ): void {
-        timeline.getTimelineSet().addEventsToTimeline(events, toStartOfTimeline, timeline, paginationToken);
-    }
-
-    /**
-     * Get the instance of the thread associated with the current event
-     * @param eventId - the ID of the current event
-     * @returns a thread instance if known
-     */
-    public getThread(eventId: string): Thread | null {
-        return this.threads.get(eventId) ?? null;
-    }
-
-    /**
-     * Get all the known threads in the room
-     */
-    public getThreads(): Thread[] {
-        return Array.from(this.threads.values());
-    }
-
-    /**
-     * Get a member from the current room state.
-     * @param userId - The user ID of the member.
-     * @returns The member or `null`.
-     */
-    public getMember(userId: string): RoomMember | null {
-        return this.currentState.getMember(userId);
-    }
-
-    /**
-     * Get all currently loaded members from the current
-     * room state.
-     * @returns Room members
-     */
-    public getMembers(): RoomMember[] {
-        return this.currentState.getMembers();
-    }
-
-    /**
-     * Get a list of members whose membership state is "join".
-     * @returns A list of currently joined members.
-     */
-    public getJoinedMembers(): RoomMember[] {
-        return this.getMembersWithMembership("join");
-    }
-
-    /**
-     * Returns the number of joined members in this room
-     * This method caches the result.
-     * This is a wrapper around the method of the same name in roomState, returning
-     * its result for the room's current state.
-     * @returns The number of members in this room whose membership is 'join'
-     */
-    public getJoinedMemberCount(): number {
-        return this.currentState.getJoinedMemberCount();
-    }
-
-    /**
-     * Returns the number of invited members in this room
-     * @returns The number of members in this room whose membership is 'invite'
-     */
-    public getInvitedMemberCount(): number {
-        return this.currentState.getInvitedMemberCount();
-    }
-
-    /**
-     * Returns the number of invited + joined members in this room
-     * @returns The number of members in this room whose membership is 'invite' or 'join'
-     */
-    public getInvitedAndJoinedMemberCount(): number {
-        return this.getInvitedMemberCount() + this.getJoinedMemberCount();
-    }
-
-    /**
-     * Get a list of members with given membership state.
-     * @param membership - The membership state.
-     * @returns A list of members with the given membership state.
-     */
-    public getMembersWithMembership(membership: string): RoomMember[] {
-        return this.currentState.getMembers().filter(function (m) {
-            return m.membership === membership;
-        });
-    }
-
-    /**
-     * Get a list of members we should be encrypting for in this room
-     * @returns A list of members who
-     * we should encrypt messages for in this room.
-     */
-    public async getEncryptionTargetMembers(): Promise<RoomMember[]> {
-        await this.loadMembersIfNeeded();
-        let members = this.getMembersWithMembership("join");
-        if (this.shouldEncryptForInvitedMembers()) {
-            members = members.concat(this.getMembersWithMembership("invite"));
-        }
-        return members;
-    }
-
-    /**
-     * Determine whether we should encrypt messages for invited users in this room
-     * @returns if we should encrypt messages for invited users
-     */
-    public shouldEncryptForInvitedMembers(): boolean {
-        const ev = this.currentState.getStateEvents(EventType.RoomHistoryVisibility, "");
-        return ev?.getContent()?.history_visibility !== "joined";
-    }
-
-    /**
-     * Get the default room name (i.e. what a given user would see if the
-     * room had no m.room.name)
-     * @param userId - The userId from whose perspective we want
-     * to calculate the default name
-     * @returns The default room name
-     */
-    public getDefaultRoomName(userId: string): string {
-        return this.calculateRoomName(userId, true);
-    }
-
-    /**
-     * Check if the given user_id has the given membership state.
-     * @param userId - The user ID to check.
-     * @param membership - The membership e.g. `'join'`
-     * @returns True if this user_id has the given membership state.
-     */
-    public hasMembershipState(userId: string, membership: string): boolean {
-        const member = this.getMember(userId);
-        if (!member) {
-            return false;
-        }
-        return member.membership === membership;
-    }
-
-    /**
-     * Add a timelineSet for this room with the given filter
-     * @param filter - The filter to be applied to this timelineSet
-     * @param opts - Configuration options
-     * @returns The timelineSet
-     */
-    public getOrCreateFilteredTimelineSet(
-        filter: Filter,
-        { prepopulateTimeline = true, useSyncEvents = true, pendingEvents = true }: ICreateFilterOpts = {},
-    ): EventTimelineSet {
-        if (this.filteredTimelineSets[filter.filterId!]) {
-            return this.filteredTimelineSets[filter.filterId!];
-        }
-        const opts = Object.assign({ filter, pendingEvents }, this.opts);
-        const timelineSet = new EventTimelineSet(this, opts);
-        this.reEmitter.reEmit(timelineSet, [RoomEvent.Timeline, RoomEvent.TimelineReset]);
-        if (useSyncEvents) {
-            this.filteredTimelineSets[filter.filterId!] = timelineSet;
-            this.timelineSets.push(timelineSet);
-        }
-
-        const unfilteredLiveTimeline = this.getLiveTimeline();
-        // Not all filter are possible to replicate client-side only
-        // When that's the case we do not want to prepopulate from the live timeline
-        // as we would get incorrect results compared to what the server would send back
-        if (prepopulateTimeline) {
-            // populate up the new timelineSet with filtered events from our live
-            // unfiltered timeline.
-            //
-            // XXX: This is risky as our timeline
-            // may have grown huge and so take a long time to filter.
-            // see https://github.com/vector-im/vector-web/issues/2109
-
-            unfilteredLiveTimeline.getEvents().forEach(function (event) {
-                timelineSet.addLiveEvent(event);
-            });
-
-            // find the earliest unfiltered timeline
-            let timeline = unfilteredLiveTimeline;
-            while (timeline.getNeighbouringTimeline(EventTimeline.BACKWARDS)) {
-                timeline = timeline.getNeighbouringTimeline(EventTimeline.BACKWARDS)!;
-            }
-
-            timelineSet
-                .getLiveTimeline()
-                .setPaginationToken(timeline.getPaginationToken(EventTimeline.BACKWARDS), EventTimeline.BACKWARDS);
-        } else if (useSyncEvents) {
-            const livePaginationToken = unfilteredLiveTimeline.getPaginationToken(Direction.Forward);
-            timelineSet.getLiveTimeline().setPaginationToken(livePaginationToken, Direction.Backward);
-        }
-
-        // alternatively, we could try to do something like this to try and re-paginate
-        // in the filtered events from nothing, but Mark says it's an abuse of the API
-        // to do so:
-        //
-        // timelineSet.resetLiveTimeline(
-        //      unfilteredLiveTimeline.getPaginationToken(EventTimeline.FORWARDS)
-        // );
-
-        return timelineSet;
-    }
-
-    private async getThreadListFilter(filterType = ThreadFilterType.All): Promise<Filter> {
-        const myUserId = this.client.getUserId()!;
-        const filter = new Filter(myUserId);
-
-        const definition: IFilterDefinition = {
-            room: {
-                timeline: {
-                    [FILTER_RELATED_BY_REL_TYPES.name]: [THREAD_RELATION_TYPE.name],
-                },
-            },
-        };
-
-        if (filterType === ThreadFilterType.My) {
-            definition!.room!.timeline![FILTER_RELATED_BY_SENDERS.name] = [myUserId];
-        }
-
-        filter.setDefinition(definition);
-        const filterId = await this.client.getOrCreateFilter(`THREAD_PANEL_${this.roomId}_${filterType}`, filter);
-
-        filter.filterId = filterId;
-
-        return filter;
-    }
-
-    private async createThreadTimelineSet(filterType?: ThreadFilterType): Promise<EventTimelineSet> {
-        let timelineSet: EventTimelineSet;
-        if (Thread.hasServerSideListSupport) {
-            timelineSet = new EventTimelineSet(
-                this,
-                {
-                    ...this.opts,
-                    pendingEvents: false,
-                },
-                undefined,
-                undefined,
-                filterType ?? ThreadFilterType.All,
-            );
-            this.reEmitter.reEmit(timelineSet, [RoomEvent.Timeline, RoomEvent.TimelineReset]);
-        } else if (Thread.hasServerSideSupport) {
-            const filter = await this.getThreadListFilter(filterType);
-
-            timelineSet = this.getOrCreateFilteredTimelineSet(filter, {
-                prepopulateTimeline: false,
-                useSyncEvents: false,
-                pendingEvents: false,
-            });
-        } else {
-            timelineSet = new EventTimelineSet(this, {
-                pendingEvents: false,
-            });
-
-            Array.from(this.threads).forEach(([, thread]) => {
-                if (thread.length === 0) return;
-                const currentUserParticipated = thread.timeline.some((event) => {
-                    return event.getSender() === this.client.getUserId();
-                });
-                if (filterType !== ThreadFilterType.My || currentUserParticipated) {
-                    timelineSet.getLiveTimeline().addEvent(thread.rootEvent!, {
-                        toStartOfTimeline: false,
-                    });
-                }
-            });
-        }
-
-        return timelineSet;
-    }
-
-    private threadsReady = false;
-
-    /**
-     * Takes the given thread root events and creates threads for them.
-     */
-    public processThreadRoots(events: MatrixEvent[], toStartOfTimeline: boolean): void {
-        for (const rootEvent of events) {
-            EventTimeline.setEventMetadata(rootEvent, this.currentState, toStartOfTimeline);
-            if (!this.getThread(rootEvent.getId()!)) {
-                this.createThread(rootEvent.getId()!, rootEvent, [], toStartOfTimeline);
-            }
-        }
-    }
-
-    /**
-     * Fetch the bare minimum of room threads required for the thread list to work reliably.
-     * With server support that means fetching one page.
-     * Without server support that means fetching as much at once as the server allows us to.
-     */
-    public async fetchRoomThreads(): Promise<void> {
-        if (this.threadsReady || !this.client.supportsThreads()) {
-            return;
-        }
-
-        if (Thread.hasServerSideListSupport) {
-            await Promise.all([
-                this.fetchRoomThreadList(ThreadFilterType.All),
-                this.fetchRoomThreadList(ThreadFilterType.My),
-            ]);
-        } else {
-            const allThreadsFilter = await this.getThreadListFilter();
-
-            const { chunk: events } = await this.client.createMessagesRequest(
-                this.roomId,
-                "",
-                Number.MAX_SAFE_INTEGER,
-                Direction.Backward,
-                allThreadsFilter,
-            );
-
-            if (!events.length) return;
-
-            // Sorted by last_reply origin_server_ts
-            const threadRoots = events.map(this.client.getEventMapper()).sort((eventA, eventB) => {
-                /**
-                 * `origin_server_ts` in a decentralised world is far from ideal
-                 * but for lack of any better, we will have to use this
-                 * Long term the sorting should be handled by homeservers and this
-                 * is only meant as a short term patch
-                 */
-                const threadAMetadata = eventA.getServerAggregatedRelation<IThreadBundledRelationship>(
-                    THREAD_RELATION_TYPE.name,
-                )!;
-                const threadBMetadata = eventB.getServerAggregatedRelation<IThreadBundledRelationship>(
-                    THREAD_RELATION_TYPE.name,
-                )!;
-                return threadAMetadata.latest_event.origin_server_ts - threadBMetadata.latest_event.origin_server_ts;
-            });
-
-            let latestMyThreadsRootEvent: MatrixEvent | undefined;
-            const roomState = this.getLiveTimeline().getState(EventTimeline.FORWARDS);
-            for (const rootEvent of threadRoots) {
-                const opts = {
-                    duplicateStrategy: DuplicateStrategy.Ignore,
-                    fromCache: false,
-                    roomState,
-                };
-                this.threadsTimelineSets[0]?.addLiveEvent(rootEvent, opts);
-
-                const threadRelationship = rootEvent.getServerAggregatedRelation<IThreadBundledRelationship>(
-                    THREAD_RELATION_TYPE.name,
-                );
-                if (threadRelationship?.current_user_participated) {
-                    this.threadsTimelineSets[1]?.addLiveEvent(rootEvent, opts);
-                    latestMyThreadsRootEvent = rootEvent;
-                }
-            }
-
-            this.processThreadRoots(threadRoots, true);
-
-            this.client.decryptEventIfNeeded(threadRoots[threadRoots.length - 1]);
-            if (latestMyThreadsRootEvent) {
-                this.client.decryptEventIfNeeded(latestMyThreadsRootEvent);
-            }
-        }
-
-        this.on(ThreadEvent.NewReply, this.onThreadNewReply);
-        this.on(ThreadEvent.Delete, this.onThreadDelete);
-        this.threadsReady = true;
-    }
-
-    public async processPollEvents(events: MatrixEvent[]): Promise<void> {
-        const processPollStartEvent = (event: MatrixEvent): void => {
-            if (!M_POLL_START.matches(event.getType())) return;
-            try {
-                const poll = new Poll(event, this.client, this);
-                this.polls.set(event.getId()!, poll);
-                this.emit(PollEvent.New, poll);
-            } catch {}
-            // poll creation can fail for malformed poll start events
-        };
-
-        const processPollRelationEvent = (event: MatrixEvent): void => {
-            const relationEventId = event.relationEventId;
-            if (relationEventId && this.polls.has(relationEventId)) {
-                const poll = this.polls.get(relationEventId);
-                poll?.onNewRelation(event);
-            }
-        };
-
-        const processPollEvent = (event: MatrixEvent): void => {
-            processPollStartEvent(event);
-            processPollRelationEvent(event);
-        };
-
-        for (const event of events) {
-            try {
-                await this.client.decryptEventIfNeeded(event);
-                processPollEvent(event);
-            } catch {}
-        }
-    }
-
-    /**
-     * Fetch a single page of threadlist messages for the specific thread filter
-     * @internal
-     */
-    private async fetchRoomThreadList(filter?: ThreadFilterType): Promise<void> {
-        const timelineSet = filter === ThreadFilterType.My ? this.threadsTimelineSets[1] : this.threadsTimelineSets[0];
-
-        const { chunk: events, end } = await this.client.createThreadListMessagesRequest(
-            this.roomId,
-            null,
-            undefined,
-            Direction.Backward,
-            timelineSet.threadListType,
-            timelineSet.getFilter(),
-        );
-
-        timelineSet.getLiveTimeline().setPaginationToken(end ?? null, Direction.Backward);
-
-        if (!events.length) return;
-
-        const matrixEvents = events.map(this.client.getEventMapper());
-        this.processThreadRoots(matrixEvents, true);
-        const roomState = this.getLiveTimeline().getState(EventTimeline.FORWARDS);
-        for (const rootEvent of matrixEvents) {
-            timelineSet.addLiveEvent(rootEvent, {
-                duplicateStrategy: DuplicateStrategy.Replace,
-                fromCache: false,
-                roomState,
-            });
-        }
-    }
-
-    private onThreadNewReply(thread: Thread): void {
-        this.updateThreadRootEvents(thread, false, true);
-    }
-
-    private onThreadDelete(thread: Thread): void {
-        this.threads.delete(thread.id);
-
-        const timeline = this.getTimelineForEvent(thread.id);
-        const roomEvent = timeline?.getEvents()?.find((it) => it.getId() === thread.id);
-        if (roomEvent) {
-            thread.clearEventMetadata(roomEvent);
-        } else {
-            logger.debug("onThreadDelete: Could not find root event in room timeline");
-        }
-        for (const timelineSet of this.threadsTimelineSets) {
-            timelineSet.removeEvent(thread.id);
-        }
-    }
-
-    /**
-     * Forget the timelineSet for this room with the given filter
-     *
-     * @param filter - the filter whose timelineSet is to be forgotten
-     */
-    public removeFilteredTimelineSet(filter: Filter): void {
-        const timelineSet = this.filteredTimelineSets[filter.filterId!];
-        delete this.filteredTimelineSets[filter.filterId!];
-        const i = this.timelineSets.indexOf(timelineSet);
-        if (i > -1) {
-            this.timelineSets.splice(i, 1);
-        }
-    }
-
-    public eventShouldLiveIn(
-        event: MatrixEvent,
-        events?: MatrixEvent[],
-        roots?: Set<string>,
-    ): {
-        shouldLiveInRoom: boolean;
-        shouldLiveInThread: boolean;
-        threadId?: string;
-    } {
-        if (!this.client?.supportsThreads()) {
-            return {
-                shouldLiveInRoom: true,
-                shouldLiveInThread: false,
-            };
-        }
-
-        // A thread root is always shown in both timelines
-        if (event.isThreadRoot || roots?.has(event.getId()!)) {
-            return {
-                shouldLiveInRoom: true,
-                shouldLiveInThread: true,
-                threadId: event.getId(),
-            };
-        }
-
-        // A thread relation is always only shown in a thread
-        if (event.isRelation(THREAD_RELATION_TYPE.name)) {
-            return {
-                shouldLiveInRoom: false,
-                shouldLiveInThread: true,
-                threadId: event.threadRootId,
-            };
-        }
-
-        const parentEventId = event.getAssociatedId();
-        let parentEvent: MatrixEvent | undefined;
-        if (parentEventId) {
-            parentEvent = this.findEventById(parentEventId) ?? events?.find((e) => e.getId() === parentEventId);
-        }
-
-        // Treat relations and redactions as extensions of their parents so evaluate parentEvent instead
-        if (parentEvent && (event.isRelation() || event.isRedaction())) {
-            return this.eventShouldLiveIn(parentEvent, events, roots);
-        }
-
-        // Edge case where we know the event is a relation but don't have the parentEvent
-        if (roots?.has(event.relationEventId!)) {
-            return {
-                shouldLiveInRoom: true,
-                shouldLiveInThread: true,
-                threadId: event.relationEventId,
-            };
-        }
-
-        // We've exhausted all scenarios, can safely assume that this event should live in the room timeline only
-        return {
-            shouldLiveInRoom: true,
-            shouldLiveInThread: false,
-        };
-    }
-
-    public findThreadForEvent(event?: MatrixEvent): Thread | null {
-        if (!event) return null;
-
-        const { threadId } = this.eventShouldLiveIn(event);
-        return threadId ? this.getThread(threadId) : null;
-    }
-
-    private addThreadedEvents(threadId: string, events: MatrixEvent[], toStartOfTimeline = false): void {
-        let thread = this.getThread(threadId);
-
-        if (!thread) {
-            const rootEvent = this.findEventById(threadId) ?? events.find((e) => e.getId() === threadId);
-            thread = this.createThread(threadId, rootEvent, events, toStartOfTimeline);
-        }
-
-        thread.addEvents(events, toStartOfTimeline);
-    }
-
-    /**
-     * Adds events to a thread's timeline. Will fire "Thread.update"
-     */
-    public processThreadedEvents(events: MatrixEvent[], toStartOfTimeline: boolean): void {
-        events.forEach(this.applyRedaction);
-
-        const eventsByThread: { [threadId: string]: MatrixEvent[] } = {};
-        for (const event of events) {
-            const { threadId, shouldLiveInThread } = this.eventShouldLiveIn(event);
-            if (shouldLiveInThread && !eventsByThread[threadId!]) {
-                eventsByThread[threadId!] = [];
-            }
-            eventsByThread[threadId!]?.push(event);
-        }
-
-        Object.entries(eventsByThread).map(([threadId, threadEvents]) =>
-            this.addThreadedEvents(threadId, threadEvents, toStartOfTimeline),
-        );
-    }
-
-    private updateThreadRootEvents = (thread: Thread, toStartOfTimeline: boolean, recreateEvent: boolean): void => {
-        if (thread.length) {
-            this.updateThreadRootEvent(this.threadsTimelineSets?.[0], thread, toStartOfTimeline, recreateEvent);
-            if (thread.hasCurrentUserParticipated) {
-                this.updateThreadRootEvent(this.threadsTimelineSets?.[1], thread, toStartOfTimeline, recreateEvent);
-            }
-        }
-    };
-
-    private updateThreadRootEvent = (
-        timelineSet: Optional<EventTimelineSet>,
-        thread: Thread,
-        toStartOfTimeline: boolean,
-        recreateEvent: boolean,
-    ): void => {
-        if (timelineSet && thread.rootEvent) {
-            if (recreateEvent) {
-                timelineSet.removeEvent(thread.id);
-            }
-            if (Thread.hasServerSideSupport) {
-                timelineSet.addLiveEvent(thread.rootEvent, {
-                    duplicateStrategy: DuplicateStrategy.Replace,
-                    fromCache: false,
-                    roomState: this.currentState,
-                });
-            } else {
-                timelineSet.addEventToTimeline(thread.rootEvent, timelineSet.getLiveTimeline(), { toStartOfTimeline });
-            }
-        }
-    };
-
-    public createThread(
-        threadId: string,
-        rootEvent: MatrixEvent | undefined,
-        events: MatrixEvent[] = [],
-        toStartOfTimeline: boolean,
-    ): Thread {
-        if (this.threads.has(threadId)) {
-            return this.threads.get(threadId)!;
-        }
-
-        if (rootEvent) {
-            const relatedEvents = this.relations.getAllChildEventsForEvent(rootEvent.getId()!);
-            if (relatedEvents?.length) {
-                // Include all relations of the root event, given it'll be visible in both timelines,
-                // except `m.replace` as that will already be applied atop the event using `MatrixEvent::makeReplaced`
-                events = events.concat(relatedEvents.filter((e) => !e.isRelation(RelationType.Replace)));
-            }
-        }
-
-        const thread = new Thread(threadId, rootEvent, {
-            room: this,
-            client: this.client,
-            pendingEventOrdering: this.opts.pendingEventOrdering,
-            receipts: this.cachedThreadReadReceipts.get(threadId) ?? [],
-        });
-
-        // All read receipts should now come down from sync, we do not need to keep
-        // a reference to the cached receipts anymore.
-        this.cachedThreadReadReceipts.delete(threadId);
-
-        // If we managed to create a thread and figure out its `id` then we can use it
-        // This has to happen before thread.addEvents, because that adds events to the eventtimeline, and the
-        // eventtimeline sometimes looks up thread information via the room.
-        this.threads.set(thread.id, thread);
-
-        // This is necessary to be able to jump to events in threads:
-        // If we jump to an event in a thread where neither the event, nor the root,
-        // nor any thread event are loaded yet, we'll load the event as well as the thread root, create the thread,
-        // and pass the event through this.
-        thread.addEvents(events, false);
-
-        this.reEmitter.reEmit(thread, [
-            ThreadEvent.Delete,
-            ThreadEvent.Update,
-            ThreadEvent.NewReply,
-            RoomEvent.Timeline,
-            RoomEvent.TimelineReset,
-        ]);
-        const isNewer =
-            this.lastThread?.rootEvent &&
-            rootEvent?.localTimestamp &&
-            this.lastThread.rootEvent?.localTimestamp < rootEvent?.localTimestamp;
-
-        if (!this.lastThread || isNewer) {
-            this.lastThread = thread;
-        }
-
-        if (this.threadsReady) {
-            this.updateThreadRootEvents(thread, toStartOfTimeline, false);
-        }
-        this.emit(ThreadEvent.New, thread, toStartOfTimeline);
-
-        return thread;
-    }
-
-    private applyRedaction = (event: MatrixEvent): void => {
-        if (event.isRedaction()) {
-            const redactId = event.event.redacts;
-
-            // if we know about this event, redact its contents now.
-            const redactedEvent = redactId ? this.findEventById(redactId) : undefined;
-            if (redactedEvent) {
-                redactedEvent.makeRedacted(event);
-
-                // If this is in the current state, replace it with the redacted version
-                if (redactedEvent.isState()) {
-                    const currentStateEvent = this.currentState.getStateEvents(
-                        redactedEvent.getType(),
-                        redactedEvent.getStateKey()!,
-                    );
-                    if (currentStateEvent?.getId() === redactedEvent.getId()) {
-                        this.currentState.setStateEvents([redactedEvent]);
-                    }
-                }
-
-                this.emit(RoomEvent.Redaction, event, this);
-
-                // TODO: we stash user displaynames (among other things) in
-                // RoomMember objects which are then attached to other events
-                // (in the sender and target fields). We should get those
-                // RoomMember objects to update themselves when the events that
-                // they are based on are changed.
-
-                // Remove any visibility change on this event.
-                this.visibilityEvents.delete(redactId!);
-
-                // If this event is a visibility change event, remove it from the
-                // list of visibility changes and update any event affected by it.
-                if (redactedEvent.isVisibilityEvent()) {
-                    this.redactVisibilityChangeEvent(event);
-                }
-            }
-
-            // FIXME: apply redactions to notification list
-
-            // NB: We continue to add the redaction event to the timeline so
-            // clients can say "so and so redacted an event" if they wish to. Also
-            // this may be needed to trigger an update.
-        }
-    };
-
-    private processLiveEvent(event: MatrixEvent): void {
-        this.applyRedaction(event);
-
-        // Implement MSC3531: hiding messages.
-        if (event.isVisibilityEvent()) {
-            // This event changes the visibility of another event, record
-            // the visibility change, inform clients if necessary.
-            this.applyNewVisibilityEvent(event);
-        }
-        // If any pending visibility change is waiting for this (older) event,
-        this.applyPendingVisibilityEvents(event);
-
-        // Sliding Sync modifications:
-        // The proxy cannot guarantee every sent event will have a transaction_id field, so we need
-        // to check the event ID against the list of pending events if there is no transaction ID
-        // field. Only do this for events sent by us though as it's potentially expensive to loop
-        // the pending events map.
-        const txnId = event.getUnsigned().transaction_id;
-        if (!txnId && event.getSender() === this.myUserId) {
-            // check the txn map for a matching event ID
-            for (const [tid, localEvent] of this.txnToEvent) {
-                if (localEvent.getId() === event.getId()) {
-                    logger.debug("processLiveEvent: found sent event without txn ID: ", tid, event.getId());
-                    // update the unsigned field so we can re-use the same codepaths
-                    const unsigned = event.getUnsigned();
-                    unsigned.transaction_id = tid;
-                    event.setUnsigned(unsigned);
-                    break;
-                }
-            }
-        }
-    }
-
-    /**
-     * Add an event to the end of this room's live timelines. Will fire
-     * "Room.timeline".
-     *
-     * @param event - Event to be added
-     * @param addLiveEventOptions - addLiveEvent options
-     * @internal
-     *
-     * @remarks
-     * Fires {@link RoomEvent.Timeline}
-     */
-    private addLiveEvent(event: MatrixEvent, addLiveEventOptions: IAddLiveEventOptions): void {
-        const { duplicateStrategy, timelineWasEmpty, fromCache } = addLiveEventOptions;
-
-        // add to our timeline sets
-        for (const timelineSet of this.timelineSets) {
-            timelineSet.addLiveEvent(event, {
-                duplicateStrategy,
-                fromCache,
-                timelineWasEmpty,
-            });
-        }
-
-        // synthesize and inject implicit read receipts
-        // Done after adding the event because otherwise the app would get a read receipt
-        // pointing to an event that wasn't yet in the timeline
-        // Don't synthesize RR for m.room.redaction as this causes the RR to go missing.
-        if (event.sender && event.getType() !== EventType.RoomRedaction) {
-            this.addReceipt(synthesizeReceipt(event.sender.userId, event, ReceiptType.Read), true);
-
-            // Any live events from a user could be taken as implicit
-            // presence information: evidence that they are currently active.
-            // ...except in a world where we use 'user.currentlyActive' to reduce
-            // presence spam, this isn't very useful - we'll get a transition when
-            // they are no longer currently active anyway. So don't bother to
-            // reset the lastActiveAgo and lastPresenceTs from the RoomState's user.
-        }
-    }
-
-    /**
-     * Add a pending outgoing event to this room.
-     *
-     * <p>The event is added to either the pendingEventList, or the live timeline,
-     * depending on the setting of opts.pendingEventOrdering.
-     *
-     * <p>This is an internal method, intended for use by MatrixClient.
-     *
-     * @param event - The event to add.
-     *
-     * @param txnId - Transaction id for this outgoing event
-     *
-     * @throws if the event doesn't have status SENDING, or we aren't given a
-     * unique transaction id.
-     *
-     * @remarks
-     * Fires {@link RoomEvent.LocalEchoUpdated}
-     */
-    public addPendingEvent(event: MatrixEvent, txnId: string): void {
-        if (event.status !== EventStatus.SENDING && event.status !== EventStatus.NOT_SENT) {
-            throw new Error("addPendingEvent called on an event with status " + event.status);
-        }
-
-        if (this.txnToEvent.get(txnId)) {
-            throw new Error("addPendingEvent called on an event with known txnId " + txnId);
-        }
-
-        // call setEventMetadata to set up event.sender etc
-        // as event is shared over all timelineSets, we set up its metadata based
-        // on the unfiltered timelineSet.
-        EventTimeline.setEventMetadata(event, this.getLiveTimeline().getState(EventTimeline.FORWARDS)!, false);
-
-        this.txnToEvent.set(txnId, event);
-        if (this.pendingEventList) {
-            if (this.pendingEventList.some((e) => e.status === EventStatus.NOT_SENT)) {
-                logger.warn("Setting event as NOT_SENT due to messages in the same state");
-                event.setStatus(EventStatus.NOT_SENT);
-            }
-            this.pendingEventList.push(event);
-            this.savePendingEvents();
-            if (event.isRelation()) {
-                // For pending events, add them to the relations collection immediately.
-                // (The alternate case below already covers this as part of adding to
-                // the timeline set.)
-                this.aggregateNonLiveRelation(event);
-            }
-
-            if (event.isRedaction()) {
-                const redactId = event.event.redacts;
-                let redactedEvent = this.pendingEventList.find((e) => e.getId() === redactId);
-                if (!redactedEvent && redactId) {
-                    redactedEvent = this.findEventById(redactId);
-                }
-                if (redactedEvent) {
-                    redactedEvent.markLocallyRedacted(event);
-                    this.emit(RoomEvent.Redaction, event, this);
-                }
-            }
-        } else {
-            for (const timelineSet of this.timelineSets) {
-                if (timelineSet.getFilter()) {
-                    if (timelineSet.getFilter()!.filterRoomTimeline([event]).length) {
-                        timelineSet.addEventToTimeline(event, timelineSet.getLiveTimeline(), {
-                            toStartOfTimeline: false,
-                        });
-                    }
-                } else {
-                    timelineSet.addEventToTimeline(event, timelineSet.getLiveTimeline(), {
-                        toStartOfTimeline: false,
-                    });
-                }
-            }
-        }
-
-        this.emit(RoomEvent.LocalEchoUpdated, event, this);
-    }
-
-    /**
-     * Persists all pending events to local storage
-     *
-     * If the current room is encrypted only encrypted events will be persisted
-     * all messages that are not yet encrypted will be discarded
-     *
-     * This is because the flow of EVENT_STATUS transition is
-     * `queued => sending => encrypting => sending => sent`
-     *
-     * Steps 3 and 4 are skipped for unencrypted room.
-     * It is better to discard an unencrypted message rather than persisting
-     * it locally for everyone to read
-     */
-    private savePendingEvents(): void {
-        if (this.pendingEventList) {
-            const pendingEvents = this.pendingEventList
-                .map((event) => {
-                    return {
-                        ...event.event,
-                        txn_id: event.getTxnId(),
-                    };
-                })
-                .filter((event) => {
-                    // Filter out the unencrypted messages if the room is encrypted
-                    const isEventEncrypted = event.type === EventType.RoomMessageEncrypted;
-                    const isRoomEncrypted = this.client.isRoomEncrypted(this.roomId);
-                    return isEventEncrypted || !isRoomEncrypted;
-                });
-
-            this.client.store.setPendingEvents(this.roomId, pendingEvents);
-        }
-    }
-
-    /**
-     * Used to aggregate the local echo for a relation, and also
-     * for re-applying a relation after it's redaction has been cancelled,
-     * as the local echo for the redaction of the relation would have
-     * un-aggregated the relation. Note that this is different from regular messages,
-     * which are just kept detached for their local echo.
-     *
-     * Also note that live events are aggregated in the live EventTimelineSet.
-     * @param event - the relation event that needs to be aggregated.
-     */
-    private aggregateNonLiveRelation(event: MatrixEvent): void {
-        this.relations.aggregateChildEvent(event);
-    }
-
-    public getEventForTxnId(txnId: string): MatrixEvent | undefined {
-        return this.txnToEvent.get(txnId);
-    }
-
-    /**
-     * Deal with the echo of a message we sent.
-     *
-     * <p>We move the event to the live timeline if it isn't there already, and
-     * update it.
-     *
-     * @param remoteEvent -   The event received from
-     *    /sync
-     * @param localEvent -    The local echo, which
-     *    should be either in the pendingEventList or the timeline.
-     *
-     * @internal
-     *
-     * @remarks
-     * Fires {@link RoomEvent.LocalEchoUpdated}
-     */
-    public handleRemoteEcho(remoteEvent: MatrixEvent, localEvent: MatrixEvent): void {
-        const oldEventId = localEvent.getId()!;
-        const newEventId = remoteEvent.getId()!;
-        const oldStatus = localEvent.status;
-
-        logger.debug(`Got remote echo for event ${oldEventId} -> ${newEventId} old status ${oldStatus}`);
-
-        // no longer pending
-        this.txnToEvent.delete(remoteEvent.getUnsigned().transaction_id!);
-
-        // if it's in the pending list, remove it
-        if (this.pendingEventList) {
-            this.removePendingEvent(oldEventId);
-        }
-
-        // replace the event source (this will preserve the plaintext payload if
-        // any, which is good, because we don't want to try decoding it again).
-        localEvent.handleRemoteEcho(remoteEvent.event);
-
-        const { shouldLiveInRoom, threadId } = this.eventShouldLiveIn(remoteEvent);
-        const thread = threadId ? this.getThread(threadId) : null;
-        thread?.setEventMetadata(localEvent);
-        thread?.timelineSet.handleRemoteEcho(localEvent, oldEventId, newEventId);
-
-        if (shouldLiveInRoom) {
-            for (const timelineSet of this.timelineSets) {
-                // if it's already in the timeline, update the timeline map. If it's not, add it.
-                timelineSet.handleRemoteEcho(localEvent, oldEventId, newEventId);
-            }
-        }
-
-        this.emit(RoomEvent.LocalEchoUpdated, localEvent, this, oldEventId, oldStatus);
-    }
-
-    /**
-     * Update the status / event id on a pending event, to reflect its transmission
-     * progress.
-     *
-     * <p>This is an internal method.
-     *
-     * @param event -      local echo event
-     * @param newStatus -  status to assign
-     * @param newEventId -      new event id to assign. Ignored unless newStatus == EventStatus.SENT.
-     *
-     * @remarks
-     * Fires {@link RoomEvent.LocalEchoUpdated}
-     */
-    public updatePendingEvent(event: MatrixEvent, newStatus: EventStatus, newEventId?: string): void {
-        logger.log(
-            `setting pendingEvent status to ${newStatus} in ${event.getRoomId()} ` +
-                `event ID ${event.getId()} -> ${newEventId}`,
-        );
-
-        // if the message was sent, we expect an event id
-        if (newStatus == EventStatus.SENT && !newEventId) {
-            throw new Error("updatePendingEvent called with status=SENT, but no new event id");
-        }
-
-        // SENT races against /sync, so we have to special-case it.
-        if (newStatus == EventStatus.SENT) {
-            const timeline = this.getTimelineForEvent(newEventId!);
-            if (timeline) {
-                // we've already received the event via the event stream.
-                // nothing more to do here, assuming the transaction ID was correctly matched.
-                // Let's check that.
-                const remoteEvent = this.findEventById(newEventId!);
-                const remoteTxnId = remoteEvent?.getUnsigned().transaction_id;
-                if (!remoteTxnId && remoteEvent) {
-                    // This code path is mostly relevant for the Sliding Sync proxy.
-                    // The remote event did not contain a transaction ID, so we did not handle
-                    // the remote echo yet. Handle it now.
-                    const unsigned = remoteEvent.getUnsigned();
-                    unsigned.transaction_id = event.getTxnId();
-                    remoteEvent.setUnsigned(unsigned);
-                    // the remote event is _already_ in the timeline, so we need to remove it so
-                    // we can convert the local event into the final event.
-                    this.removeEvent(remoteEvent.getId()!);
-                    this.handleRemoteEcho(remoteEvent, event);
-                }
-                return;
-            }
-        }
-
-        const oldStatus = event.status;
-        const oldEventId = event.getId()!;
-
-        if (!oldStatus) {
-            throw new Error("updatePendingEventStatus called on an event which is not a local echo.");
-        }
-
-        const allowed = ALLOWED_TRANSITIONS[oldStatus];
-        if (!allowed?.includes(newStatus)) {
-            throw new Error(`Invalid EventStatus transition ${oldStatus}->${newStatus}`);
-        }
-
-        event.setStatus(newStatus);
-
-        if (newStatus == EventStatus.SENT) {
-            // update the event id
-            event.replaceLocalEventId(newEventId!);
-
-            const { shouldLiveInRoom, threadId } = this.eventShouldLiveIn(event);
-            const thread = threadId ? this.getThread(threadId) : undefined;
-            thread?.setEventMetadata(event);
-            thread?.timelineSet.replaceEventId(oldEventId, newEventId!);
-
-            if (shouldLiveInRoom) {
-                // if the event was already in the timeline (which will be the case if
-                // opts.pendingEventOrdering==chronological), we need to update the
-                // timeline map.
-                for (const timelineSet of this.timelineSets) {
-                    timelineSet.replaceEventId(oldEventId, newEventId!);
-                }
-            }
-        } else if (newStatus == EventStatus.CANCELLED) {
-            // remove it from the pending event list, or the timeline.
-            if (this.pendingEventList) {
-                const removedEvent = this.getPendingEvent(oldEventId);
-                this.removePendingEvent(oldEventId);
-                if (removedEvent?.isRedaction()) {
-                    this.revertRedactionLocalEcho(removedEvent);
-                }
-            }
-            this.removeEvent(oldEventId);
-        }
-        this.savePendingEvents();
-
-        this.emit(RoomEvent.LocalEchoUpdated, event, this, oldEventId, oldStatus);
-    }
-
-    private revertRedactionLocalEcho(redactionEvent: MatrixEvent): void {
-        const redactId = redactionEvent.event.redacts;
-        if (!redactId) {
-            return;
-        }
-        const redactedEvent = this.getUnfilteredTimelineSet().findEventById(redactId);
-        if (redactedEvent) {
-            redactedEvent.unmarkLocallyRedacted();
-            // re-render after undoing redaction
-            this.emit(RoomEvent.RedactionCancelled, redactionEvent, this);
-            // reapply relation now redaction failed
-            if (redactedEvent.isRelation()) {
-                this.aggregateNonLiveRelation(redactedEvent);
-            }
-        }
-    }
-
-    /**
-     * Add some events to this room. This can include state events, message
-     * events and typing notifications. These events are treated as "live" so
-     * they will go to the end of the timeline.
-     *
-     * @param events - A list of events to add.
-     * @param addLiveEventOptions - addLiveEvent options
-     * @throws If `duplicateStrategy` is not falsey, 'replace' or 'ignore'.
-     */
-    public addLiveEvents(events: MatrixEvent[], addLiveEventOptions?: IAddLiveEventOptions): void;
-    /**
-     * @deprecated In favor of the overload with `IAddLiveEventOptions`
-     */
-    public addLiveEvents(events: MatrixEvent[], duplicateStrategy?: DuplicateStrategy, fromCache?: boolean): void;
-    public addLiveEvents(
-        events: MatrixEvent[],
-        duplicateStrategyOrOpts?: DuplicateStrategy | IAddLiveEventOptions,
-        fromCache = false,
-    ): void {
-        let duplicateStrategy: DuplicateStrategy | undefined = duplicateStrategyOrOpts as DuplicateStrategy;
-        let timelineWasEmpty: boolean | undefined = false;
-        if (typeof duplicateStrategyOrOpts === "object") {
-            ({
-                duplicateStrategy,
-                fromCache = false,
-                /* roomState, (not used here) */
-                timelineWasEmpty,
-            } = duplicateStrategyOrOpts);
-        } else if (duplicateStrategyOrOpts !== undefined) {
-            // Deprecation warning
-            // FIXME: Remove after 2023-06-01 (technical debt)
-            logger.warn(
-                "Overload deprecated: " +
-                    "`Room.addLiveEvents(events, duplicateStrategy?, fromCache?)` " +
-                    "is deprecated in favor of the overload with `Room.addLiveEvents(events, IAddLiveEventOptions)`",
-            );
-        }
-
-        if (duplicateStrategy && ["replace", "ignore"].indexOf(duplicateStrategy) === -1) {
-            throw new Error("duplicateStrategy MUST be either 'replace' or 'ignore'");
-        }
-
-        // sanity check that the live timeline is still live
-        for (let i = 0; i < this.timelineSets.length; i++) {
-            const liveTimeline = this.timelineSets[i].getLiveTimeline();
-            if (liveTimeline.getPaginationToken(EventTimeline.FORWARDS)) {
-                throw new Error(
-                    "live timeline " +
-                        i +
-                        " is no longer live - it has a pagination token " +
-                        "(" +
-                        liveTimeline.getPaginationToken(EventTimeline.FORWARDS) +
-                        ")",
-                );
-            }
-            if (liveTimeline.getNeighbouringTimeline(EventTimeline.FORWARDS)) {
-                throw new Error(`live timeline ${i} is no longer live - it has a neighbouring timeline`);
-            }
-        }
-
-        const threadRoots = this.findThreadRoots(events);
-        const eventsByThread: { [threadId: string]: MatrixEvent[] } = {};
-
-        const options: IAddLiveEventOptions = {
-            duplicateStrategy,
-            fromCache,
-            timelineWasEmpty,
-        };
-
-        for (const event of events) {
-            // TODO: We should have a filter to say "only add state event types X Y Z to the timeline".
-            this.processLiveEvent(event);
-
-            if (event.getUnsigned().transaction_id) {
-                const existingEvent = this.txnToEvent.get(event.getUnsigned().transaction_id!);
-                if (existingEvent) {
-                    // remote echo of an event we sent earlier
-                    this.handleRemoteEcho(event, existingEvent);
-                    continue; // we can skip adding the event to the timeline sets, it is already there
-                }
-            }
-
-            const { shouldLiveInRoom, shouldLiveInThread, threadId } = this.eventShouldLiveIn(
-                event,
-                events,
-                threadRoots,
-            );
-
-            if (shouldLiveInThread && !eventsByThread[threadId ?? ""]) {
-                eventsByThread[threadId ?? ""] = [];
-            }
-            eventsByThread[threadId ?? ""]?.push(event);
-
-            if (shouldLiveInRoom) {
-                this.addLiveEvent(event, options);
-            }
-        }
-
-        Object.entries(eventsByThread).forEach(([threadId, threadEvents]) => {
-            this.addThreadedEvents(threadId, threadEvents, false);
-        });
-    }
-
-    public partitionThreadedEvents(
-        events: MatrixEvent[],
-    ): [timelineEvents: MatrixEvent[], threadedEvents: MatrixEvent[]] {
-        // Indices to the events array, for readability
-        const ROOM = 0;
-        const THREAD = 1;
-        if (this.client.supportsThreads()) {
-            const threadRoots = this.findThreadRoots(events);
-            return events.reduce(
-                (memo, event: MatrixEvent) => {
-                    const { shouldLiveInRoom, shouldLiveInThread, threadId } = this.eventShouldLiveIn(
-                        event,
-                        events,
-                        threadRoots,
-                    );
-
-                    if (shouldLiveInRoom) {
-                        memo[ROOM].push(event);
-                    }
-
-                    if (shouldLiveInThread) {
-                        event.setThreadId(threadId ?? "");
-                        memo[THREAD].push(event);
-                    }
-
-                    return memo;
-                },
-                [[] as MatrixEvent[], [] as MatrixEvent[]],
-            );
-        } else {
-            // When `experimentalThreadSupport` is disabled treat all events as timelineEvents
-            return [events as MatrixEvent[], [] as MatrixEvent[]];
-        }
-    }
-
-    /**
-     * Given some events, find the IDs of all the thread roots that are referred to by them.
-     */
-    private findThreadRoots(events: MatrixEvent[]): Set<string> {
-        const threadRoots = new Set<string>();
-        for (const event of events) {
-            if (event.isRelation(THREAD_RELATION_TYPE.name)) {
-                threadRoots.add(event.relationEventId ?? "");
-            }
-        }
-        return threadRoots;
-    }
-
-    /**
-     * Add a receipt event to the room.
-     * @param event - The m.receipt event.
-     * @param synthetic - True if this event is implicit.
-     */
-    public addReceipt(event: MatrixEvent, synthetic = false): void {
-        const content = event.getContent<ReceiptContent>();
-        Object.keys(content).forEach((eventId: string) => {
-            Object.keys(content[eventId]).forEach((receiptType: ReceiptType | string) => {
-                Object.keys(content[eventId][receiptType]).forEach((userId: string) => {
-                    const receipt = content[eventId][receiptType][userId] as Receipt;
-                    const receiptForMainTimeline = !receipt.thread_id || receipt.thread_id === MAIN_ROOM_TIMELINE;
-                    const receiptDestination: Thread | this | undefined = receiptForMainTimeline
-                        ? this
-                        : this.threads.get(receipt.thread_id ?? "");
-
-                    if (receiptDestination) {
-                        receiptDestination.addReceiptToStructure(
-                            eventId,
-                            receiptType as ReceiptType,
-                            userId,
-                            receipt,
-                            synthetic,
-                        );
-
-                        // If the read receipt sent for the logged in user matches
-                        // the last event of the live timeline, then we know for a fact
-                        // that the user has read that message.
-                        // We can mark the room as read and not wait for the local echo
-                        // from synapse
-                        // This needs to be done after the initial sync as we do not want this
-                        // logic to run whilst the room is being initialised
-                        if (this.client.isInitialSyncComplete() && userId === this.client.getUserId()) {
-                            const lastEvent = receiptDestination.timeline[receiptDestination.timeline.length - 1];
-                            if (lastEvent && eventId === lastEvent.getId() && userId === lastEvent.getSender()) {
-                                receiptDestination.setUnread(NotificationCountType.Total, 0);
-                                receiptDestination.setUnread(NotificationCountType.Highlight, 0);
-                            }
-                        }
-                    } else {
-                        // The thread does not exist locally, keep the read receipt
-                        // in a cache locally, and re-apply  the `addReceipt` logic
-                        // when the thread is created
-                        this.cachedThreadReadReceipts.set(receipt.thread_id!, [
-                            ...(this.cachedThreadReadReceipts.get(receipt.thread_id!) ?? []),
-                            { eventId, receiptType, userId, receipt, synthetic },
-                        ]);
-                    }
-
-                    const me = this.client.getUserId();
-                    // Track the time of the current user's oldest threaded receipt in the room.
-                    if (userId === me && !receiptForMainTimeline && receipt.ts < this.oldestThreadedReceiptTs) {
-                        this.oldestThreadedReceiptTs = receipt.ts;
-                    }
-
-                    // Track each user's unthreaded read receipt.
-                    if (!receipt.thread_id && receipt.ts > (this.unthreadedReceipts.get(userId)?.ts ?? 0)) {
-                        this.unthreadedReceipts.set(userId, receipt);
-                    }
-                });
-            });
-        });
-
-        // send events after we've regenerated the structure & cache, otherwise things that
-        // listened for the event would read stale data.
-        this.emit(RoomEvent.Receipt, event, this);
-    }
-
-    /**
-     * Adds/handles ephemeral events such as typing notifications and read receipts.
-     * @param events - A list of events to process
-     */
-    public addEphemeralEvents(events: MatrixEvent[]): void {
-        for (const event of events) {
-            if (event.getType() === EventType.Typing) {
-                this.currentState.setTypingEvent(event);
-            } else if (event.getType() === EventType.Receipt) {
-                this.addReceipt(event);
-            } // else ignore - life is too short for us to care about these events
-        }
-    }
-
-    /**
-     * Removes events from this room.
-     * @param eventIds - A list of eventIds to remove.
-     */
-    public removeEvents(eventIds: string[]): void {
-        for (const eventId of eventIds) {
-            this.removeEvent(eventId);
-        }
-    }
-
-    /**
-     * Removes a single event from this room.
-     *
-     * @param eventId -  The id of the event to remove
-     *
-     * @returns true if the event was removed from any of the room's timeline sets
-     */
-    public removeEvent(eventId: string): boolean {
-        let removedAny = false;
-        for (const timelineSet of this.timelineSets) {
-            const removed = timelineSet.removeEvent(eventId);
-            if (removed) {
-                if (removed.isRedaction()) {
-                    this.revertRedactionLocalEcho(removed);
-                }
-                removedAny = true;
-            }
-        }
-        return removedAny;
-    }
-
-    /**
-     * Recalculate various aspects of the room, including the room name and
-     * room summary. Call this any time the room's current state is modified.
-     * May fire "Room.name" if the room name is updated.
-     *
-     * @remarks
-     * Fires {@link RoomEvent.Name}
-     */
-    public recalculate(): void {
-        // set fake stripped state events if this is an invite room so logic remains
-        // consistent elsewhere.
-        const membershipEvent = this.currentState.getStateEvents(EventType.RoomMember, this.myUserId);
-        if (membershipEvent) {
-            const membership = membershipEvent.getContent().membership;
-            this.updateMyMembership(membership!);
-
-            if (membership === "invite") {
-                const strippedStateEvents = membershipEvent.getUnsigned().invite_room_state || [];
-                strippedStateEvents.forEach((strippedEvent) => {
-                    const existingEvent = this.currentState.getStateEvents(strippedEvent.type, strippedEvent.state_key);
-                    if (!existingEvent) {
-                        // set the fake stripped event instead
-                        this.currentState.setStateEvents([
-                            new MatrixEvent({
-                                type: strippedEvent.type,
-                                state_key: strippedEvent.state_key,
-                                content: strippedEvent.content,
-                                event_id: "$fake" + Date.now(),
-                                room_id: this.roomId,
-                                user_id: this.myUserId, // technically a lie
-                            }),
-                        ]);
-                    }
-                });
-            }
-        }
-
-        const oldName = this.name;
-        this.name = this.calculateRoomName(this.myUserId);
-        this.normalizedName = normalize(this.name);
-        this.summary = new RoomSummary(this.roomId, {
-            title: this.name,
-        });
-
-        if (oldName !== this.name) {
-            this.emit(RoomEvent.Name, this);
-        }
-    }
-
-    /**
-     * Update the room-tag event for the room.  The previous one is overwritten.
-     * @param event - the m.tag event
-     */
-    public addTags(event: MatrixEvent): void {
-        // event content looks like:
-        // content: {
-        //    tags: {
-        //       $tagName: { $metadata: $value },
-        //       $tagName: { $metadata: $value },
-        //    }
-        // }
-
-        // XXX: do we need to deep copy here?
-        this.tags = event.getContent().tags || {};
-
-        // XXX: we could do a deep-comparison to see if the tags have really
-        // changed - but do we want to bother?
-        this.emit(RoomEvent.Tags, event, this);
-    }
-
-    /**
-     * Update the account_data events for this room, overwriting events of the same type.
-     * @param events - an array of account_data events to add
-     */
-    public addAccountData(events: MatrixEvent[]): void {
-        for (const event of events) {
-            if (event.getType() === "m.tag") {
-                this.addTags(event);
-            }
-            const eventType = event.getType();
-            const lastEvent = this.accountData.get(eventType);
-            this.accountData.set(eventType, event);
-            this.emit(RoomEvent.AccountData, event, this, lastEvent);
-        }
-    }
-
-    /**
-     * Access account_data event of given event type for this room
-     * @param type - the type of account_data event to be accessed
-     * @returns the account_data event in question
-     */
-    public getAccountData(type: EventType | string): MatrixEvent | undefined {
-        return this.accountData.get(type);
-    }
-
-    /**
-     * Returns whether the syncing user has permission to send a message in the room
-     * @returns true if the user should be permitted to send
-     *                   message events into the room.
-     */
-    public maySendMessage(): boolean {
-        return (
-            this.getMyMembership() === "join" &&
-            (this.client.isRoomEncrypted(this.roomId)
-                ? this.currentState.maySendEvent(EventType.RoomMessageEncrypted, this.myUserId)
-                : this.currentState.maySendEvent(EventType.RoomMessage, this.myUserId))
-        );
-    }
-
-    /**
-     * Returns whether the given user has permissions to issue an invite for this room.
-     * @param userId - the ID of the Matrix user to check permissions for
-     * @returns true if the user should be permitted to issue invites for this room.
-     */
-    public canInvite(userId: string): boolean {
-        let canInvite = this.getMyMembership() === "join";
-        const powerLevelsEvent = this.currentState.getStateEvents(EventType.RoomPowerLevels, "");
-        const powerLevels = powerLevelsEvent && powerLevelsEvent.getContent();
-        const me = this.getMember(userId);
-        if (powerLevels && me && powerLevels.invite > me.powerLevel) {
-            canInvite = false;
-        }
-        return canInvite;
-    }
-
-    /**
-     * Returns the join rule based on the m.room.join_rule state event, defaulting to `invite`.
-     * @returns the join_rule applied to this room
-     */
-    public getJoinRule(): JoinRule {
-        return this.currentState.getJoinRule();
-    }
-
-    /**
-     * Returns the history visibility based on the m.room.history_visibility state event, defaulting to `shared`.
-     * @returns the history_visibility applied to this room
-     */
-    public getHistoryVisibility(): HistoryVisibility {
-        return this.currentState.getHistoryVisibility();
-    }
-
-    /**
-     * Returns the history visibility based on the m.room.history_visibility state event, defaulting to `shared`.
-     * @returns the history_visibility applied to this room
-     */
-    public getGuestAccess(): GuestAccess {
-        return this.currentState.getGuestAccess();
-    }
-
-    /**
-     * Returns the type of the room from the `m.room.create` event content or undefined if none is set
-     * @returns the type of the room.
-     */
-    public getType(): RoomType | string | undefined {
-        const createEvent = this.currentState.getStateEvents(EventType.RoomCreate, "");
-        if (!createEvent) {
-            if (!this.getTypeWarning) {
-                logger.warn("[getType] Room " + this.roomId + " does not have an m.room.create event");
-                this.getTypeWarning = true;
-            }
-            return undefined;
-        }
-        return createEvent.getContent()[RoomCreateTypeField];
-    }
-
-    /**
-     * Returns whether the room is a space-room as defined by MSC1772.
-     * @returns true if the room's type is RoomType.Space
-     */
-    public isSpaceRoom(): boolean {
-        return this.getType() === RoomType.Space;
-    }
-
-    /**
-     * Returns whether the room is a call-room as defined by MSC3417.
-     * @returns true if the room's type is RoomType.UnstableCall
-     */
-    public isCallRoom(): boolean {
-        return this.getType() === RoomType.UnstableCall;
-    }
-
-    /**
-     * Returns whether the room is a video room.
-     * @returns true if the room's type is RoomType.ElementVideo
-     */
-    public isElementVideoRoom(): boolean {
-        return this.getType() === RoomType.ElementVideo;
-    }
-
-    /**
-     * Find the predecessor of this room.
-     *
-     * @param msc3946ProcessDynamicPredecessor - if true, look for an
-     * m.room.predecessor state event and use it if found (MSC3946).
-     * @returns null if this room has no predecessor. Otherwise, returns
-     * the roomId, last eventId and viaServers of the predecessor room.
-     *
-     * If msc3946ProcessDynamicPredecessor is true, use m.predecessor events
-     * as well as m.room.create events to find predecessors.
-     *
-     * Note: if an m.predecessor event is used, eventId may be undefined
-     * since last_known_event_id is optional.
-     *
-     * Note: viaServers may be undefined, and will definitely be undefined if
-     * this predecessor comes from a RoomCreate event (rather than a
-     * RoomPredecessor, which has the optional via_servers property).
-     */
-    public findPredecessor(
-        msc3946ProcessDynamicPredecessor = false,
-    ): { roomId: string; eventId?: string; viaServers?: string[] } | null {
-        const currentState = this.getLiveTimeline().getState(EventTimeline.FORWARDS);
-        if (!currentState) {
-            return null;
-        }
-        return currentState.findPredecessor(msc3946ProcessDynamicPredecessor);
-    }
-
-    private roomNameGenerator(state: RoomNameState): string {
-        if (this.client.roomNameGenerator) {
-            const name = this.client.roomNameGenerator(this.roomId, state);
-            if (name !== null) {
-                return name;
-            }
-        }
-
-        switch (state.type) {
-            case RoomNameType.Actual:
-                return state.name;
-            case RoomNameType.Generated:
-                switch (state.subtype) {
-                    case "Inviting":
-                        return `Inviting ${memberNamesToRoomName(state.names, state.count)}`;
-                    default:
-                        return memberNamesToRoomName(state.names, state.count);
-                }
-            case RoomNameType.EmptyRoom:
-                if (state.oldName) {
-                    return `Empty room (was ${state.oldName})`;
-                } else {
-                    return "Empty room";
-                }
-        }
-    }
-
-    /**
-     * This is an internal method. Calculates the name of the room from the current
-     * room state.
-     * @param userId - The client's user ID. Used to filter room members
-     * correctly.
-     * @param ignoreRoomNameEvent - Return the implicit room name that we'd see if there
-     * was no m.room.name event.
-     * @returns The calculated room name.
-     */
-    private calculateRoomName(userId: string, ignoreRoomNameEvent = false): string {
-        if (!ignoreRoomNameEvent) {
-            // check for an alias, if any. for now, assume first alias is the
-            // official one.
-            const mRoomName = this.currentState.getStateEvents(EventType.RoomName, "");
-            if (mRoomName?.getContent().name) {
-                return this.roomNameGenerator({
-                    type: RoomNameType.Actual,
-                    name: mRoomName.getContent().name,
-                });
-            }
-        }
-
-        const alias = this.getCanonicalAlias();
-        if (alias) {
-            return this.roomNameGenerator({
-                type: RoomNameType.Actual,
-                name: alias,
-            });
-        }
-
-        const joinedMemberCount = this.currentState.getJoinedMemberCount();
-        const invitedMemberCount = this.currentState.getInvitedMemberCount();
-        // -1 because these numbers include the syncing user
-        let inviteJoinCount = joinedMemberCount + invitedMemberCount - 1;
-
-        // get service members (e.g. helper bots) for exclusion
-        let excludedUserIds: string[] = [];
-        const mFunctionalMembers = this.currentState.getStateEvents(UNSTABLE_ELEMENT_FUNCTIONAL_USERS.name, "");
-        if (Array.isArray(mFunctionalMembers?.getContent().service_members)) {
-            excludedUserIds = mFunctionalMembers!.getContent().service_members;
-        }
-
-        // get members that are NOT ourselves and are actually in the room.
-        let otherNames: string[] = [];
-        if (this.summaryHeroes) {
-            // if we have a summary, the member state events should be in the room state
-            this.summaryHeroes.forEach((userId) => {
-                // filter service members
-                if (excludedUserIds.includes(userId)) {
-                    inviteJoinCount--;
-                    return;
-                }
-                const member = this.getMember(userId);
-                otherNames.push(member ? member.name : userId);
-            });
-        } else {
-            let otherMembers = this.currentState.getMembers().filter((m) => {
-                return m.userId !== userId && (m.membership === "invite" || m.membership === "join");
-            });
-            otherMembers = otherMembers.filter(({ userId }) => {
-                // filter service members
-                if (excludedUserIds.includes(userId)) {
-                    inviteJoinCount--;
-                    return false;
-                }
-                return true;
-            });
-            // make sure members have stable order
-            otherMembers.sort((a, b) => utils.compare(a.userId, b.userId));
-            // only 5 first members, immitate summaryHeroes
-            otherMembers = otherMembers.slice(0, 5);
-            otherNames = otherMembers.map((m) => m.name);
-        }
-
-        if (inviteJoinCount) {
-            return this.roomNameGenerator({
-                type: RoomNameType.Generated,
-                names: otherNames,
-                count: inviteJoinCount,
-            });
-        }
-
-        const myMembership = this.getMyMembership();
-        // if I have created a room and invited people through
-        // 3rd party invites
-        if (myMembership == "join") {
-            const thirdPartyInvites = this.currentState.getStateEvents(EventType.RoomThirdPartyInvite);
-
-            if (thirdPartyInvites?.length) {
-                const thirdPartyNames = thirdPartyInvites.map((i) => {
-                    return i.getContent().display_name;
-                });
-
-                return this.roomNameGenerator({
-                    type: RoomNameType.Generated,
-                    subtype: "Inviting",
-                    names: thirdPartyNames,
-                    count: thirdPartyNames.length + 1,
-                });
-            }
-        }
-
-        // let's try to figure out who was here before
-        let leftNames = otherNames;
-        // if we didn't have heroes, try finding them in the room state
-        if (!leftNames.length) {
-            leftNames = this.currentState
-                .getMembers()
-                .filter((m) => {
-                    return m.userId !== userId && m.membership !== "invite" && m.membership !== "join";
-                })
-                .map((m) => m.name);
-        }
-
-        let oldName: string | undefined;
-        if (leftNames.length) {
-            oldName = this.roomNameGenerator({
-                type: RoomNameType.Generated,
-                names: leftNames,
-                count: leftNames.length + 1,
-            });
-        }
-
-        return this.roomNameGenerator({
-            type: RoomNameType.EmptyRoom,
-            oldName,
-        });
-    }
-
-    /**
-     * When we receive a new visibility change event:
-     *
-     * - store this visibility change alongside the timeline, in case we
-     *   later need to apply it to an event that we haven't received yet;
-     * - if we have already received the event whose visibility has changed,
-     *   patch it to reflect the visibility change and inform listeners.
-     */
-    private applyNewVisibilityEvent(event: MatrixEvent): void {
-        const visibilityChange = event.asVisibilityChange();
-        if (!visibilityChange) {
-            // The event is ill-formed.
-            return;
-        }
-
-        // Ignore visibility change events that are not emitted by moderators.
-        const userId = event.getSender();
-        if (!userId) {
-            return;
-        }
-        const isPowerSufficient =
-            (EVENT_VISIBILITY_CHANGE_TYPE.name &&
-                this.currentState.maySendStateEvent(EVENT_VISIBILITY_CHANGE_TYPE.name, userId)) ||
-            (EVENT_VISIBILITY_CHANGE_TYPE.altName &&
-                this.currentState.maySendStateEvent(EVENT_VISIBILITY_CHANGE_TYPE.altName, userId));
-        if (!isPowerSufficient) {
-            // Powerlevel is insufficient.
-            return;
-        }
-
-        // Record this change in visibility.
-        // If the event is not in our timeline and we only receive it later,
-        // we may need to apply the visibility change at a later date.
-
-        const visibilityEventsOnOriginalEvent = this.visibilityEvents.get(visibilityChange.eventId);
-        if (visibilityEventsOnOriginalEvent) {
-            // It would be tempting to simply erase the latest visibility change
-            // but we need to record all of the changes in case the latest change
-            // is ever redacted.
-            //
-            // In practice, linear scans through `visibilityEvents` should be fast.
-            // However, to protect against a potential DoS attack, we limit the
-            // number of iterations in this loop.
-            let index = visibilityEventsOnOriginalEvent.length - 1;
-            const min = Math.max(
-                0,
-                visibilityEventsOnOriginalEvent.length - MAX_NUMBER_OF_VISIBILITY_EVENTS_TO_SCAN_THROUGH,
-            );
-            for (; index >= min; --index) {
-                const target = visibilityEventsOnOriginalEvent[index];
-                if (target.getTs() < event.getTs()) {
-                    break;
-                }
-            }
-            if (index === -1) {
-                visibilityEventsOnOriginalEvent.unshift(event);
-            } else {
-                visibilityEventsOnOriginalEvent.splice(index + 1, 0, event);
-            }
-        } else {
-            this.visibilityEvents.set(visibilityChange.eventId, [event]);
-        }
-
-        // Finally, let's check if the event is already in our timeline.
-        // If so, we need to patch it and inform listeners.
-
-        const originalEvent = this.findEventById(visibilityChange.eventId);
-        if (!originalEvent) {
-            return;
-        }
-        originalEvent.applyVisibilityEvent(visibilityChange);
-    }
-
-    private redactVisibilityChangeEvent(event: MatrixEvent): void {
-        // Sanity checks.
-        if (!event.isVisibilityEvent) {
-            throw new Error("expected a visibility change event");
-        }
-        const relation = event.getRelation();
-        const originalEventId = relation?.event_id;
-        const visibilityEventsOnOriginalEvent = this.visibilityEvents.get(originalEventId!);
-        if (!visibilityEventsOnOriginalEvent) {
-            // No visibility changes on the original event.
-            // In particular, this change event was not recorded,
-            // most likely because it was ill-formed.
-            return;
-        }
-        const index = visibilityEventsOnOriginalEvent.findIndex((change) => change.getId() === event.getId());
-        if (index === -1) {
-            // This change event was not recorded, most likely because
-            // it was ill-formed.
-            return;
-        }
-        // Remove visibility change.
-        visibilityEventsOnOriginalEvent.splice(index, 1);
-
-        // If we removed the latest visibility change event, propagate changes.
-        if (index === visibilityEventsOnOriginalEvent.length) {
-            const originalEvent = this.findEventById(originalEventId!);
-            if (!originalEvent) {
-                return;
-            }
-            if (index === 0) {
-                // We have just removed the only visibility change event.
-                this.visibilityEvents.delete(originalEventId!);
-                originalEvent.applyVisibilityEvent();
-            } else {
-                const newEvent = visibilityEventsOnOriginalEvent[visibilityEventsOnOriginalEvent.length - 1];
-                const newVisibility = newEvent.asVisibilityChange();
-                if (!newVisibility) {
-                    // Event is ill-formed.
-                    // This breaks our invariant.
-                    throw new Error("at this stage, visibility changes should be well-formed");
-                }
-                originalEvent.applyVisibilityEvent(newVisibility);
-            }
-        }
-    }
-
-    /**
-     * When we receive an event whose visibility has been altered by
-     * a (more recent) visibility change event, patch the event in
-     * place so that clients now not to display it.
-     *
-     * @param event - Any matrix event. If this event has at least one a
-     * pending visibility change event, apply the latest visibility
-     * change event.
-     */
-    private applyPendingVisibilityEvents(event: MatrixEvent): void {
-        const visibilityEvents = this.visibilityEvents.get(event.getId()!);
-        if (!visibilityEvents || visibilityEvents.length == 0) {
-            // No pending visibility change in store.
-            return;
-        }
-        const visibilityEvent = visibilityEvents[visibilityEvents.length - 1];
-        const visibilityChange = visibilityEvent.asVisibilityChange();
-        if (!visibilityChange) {
-            return;
-        }
-        if (visibilityChange.visible) {
-            // Events are visible by default, no need to apply a visibility change.
-            // Note that we need to keep the visibility changes in `visibilityEvents`,
-            // in case we later fetch an older visibility change event that is superseded
-            // by `visibilityChange`.
-        }
-        if (visibilityEvent.getTs() < event.getTs()) {
-            // Something is wrong, the visibility change cannot happen before the
-            // event. Presumably an ill-formed event.
-            return;
-        }
-        event.applyVisibilityEvent(visibilityChange);
-    }
-
-    /**
-     * Find when a client has gained thread capabilities by inspecting the oldest
-     * threaded receipt
-     * @returns the timestamp of the oldest threaded receipt
-     */
-    public getOldestThreadedReceiptTs(): number {
-        return this.oldestThreadedReceiptTs;
-    }
-
-    /**
-     * Returns the most recent unthreaded receipt for a given user
-     * @param userId - the MxID of the User
-     * @returns an unthreaded Receipt. Can be undefined if receipts have been disabled
-     * or a user chooses to use private read receipts (or we have simply not received
-     * a receipt from this user yet).
-     */
-    public getLastUnthreadedReceiptFor(userId: string): Receipt | undefined {
-        return this.unthreadedReceipts.get(userId);
-    }
-
-    /**
-     * This issue should also be addressed on synapse's side and is tracked as part
-     * of https://github.com/matrix-org/synapse/issues/14837
-     *
-     *
-     * We consider a room  fully read if the current user has sent
-     * the last event in the live timeline of that context and if the read receipt
-     * we have on record matches.
-     * This also detects all unread threads and applies the same logic to those
-     * contexts
-     */
-    public fixupNotifications(userId: string): void {
-        super.fixupNotifications(userId);
-
-        const unreadThreads = this.getThreads().filter(
-            (thread) => this.getThreadUnreadNotificationCount(thread.id, NotificationCountType.Total) > 0,
-        );
-
-        for (const thread of unreadThreads) {
-            thread.fixupNotifications(userId);
-        }
-    }
-}
-
-// a map from current event status to a list of allowed next statuses
-const ALLOWED_TRANSITIONS: Record<EventStatus, EventStatus[]> = {
-    [EventStatus.ENCRYPTING]: [EventStatus.SENDING, EventStatus.NOT_SENT, EventStatus.CANCELLED],
-    [EventStatus.SENDING]: [EventStatus.ENCRYPTING, EventStatus.QUEUED, EventStatus.NOT_SENT, EventStatus.SENT],
-    [EventStatus.QUEUED]: [EventStatus.SENDING, EventStatus.NOT_SENT, EventStatus.CANCELLED],
-    [EventStatus.SENT]: [],
-    [EventStatus.NOT_SENT]: [EventStatus.SENDING, EventStatus.QUEUED, EventStatus.CANCELLED],
-    [EventStatus.CANCELLED]: [],
-};
-
-export enum RoomNameType {
-    EmptyRoom,
-    Generated,
-    Actual,
-}
-
-export interface EmptyRoomNameState {
-    type: RoomNameType.EmptyRoom;
-    oldName?: string;
-}
-
-export interface GeneratedRoomNameState {
-    type: RoomNameType.Generated;
-    subtype?: "Inviting";
-    names: string[];
-    count: number;
-}
-
-export interface ActualRoomNameState {
-    type: RoomNameType.Actual;
-    name: string;
-}
-
-export type RoomNameState = EmptyRoomNameState | GeneratedRoomNameState | ActualRoomNameState;
-
-// Can be overriden by IMatrixClientCreateOpts::memberNamesToRoomNameFn
-function memberNamesToRoomName(names: string[], count: number): string {
-    const countWithoutMe = count - 1;
-    if (!names.length) {
-        return "Empty room";
-    } else if (names.length === 1 && countWithoutMe <= 1) {
-        return names[0];
-    } else if (names.length === 2 && countWithoutMe <= 2) {
-        return `${names[0]} and ${names[1]}`;
-    } else {
-        const plural = countWithoutMe > 1;
-        if (plural) {
-            return `${names[0]} and ${countWithoutMe} others`;
-        } else {
-            return `${names[0]} and 1 other`;
-        }
-    }
-}