import { Observable } from 'rxjs';
import { RoomEvent, WidgetApi } from '../types';
/**
 * The name of the redaction room event.
 */
export declare const ROOM_EVENT_REDACTION = "m.room.redaction";
/**
 * The content of an `m.room.redaction` event.
 */
export type Redaction = {
    /**
     * The id of the event that is redacted.
     */
    redacts: string;
};
/**
 * Types a {@link RoomEvent} to include the properties of a redaction.
 *
 * @remarks The redaction event is a special snowflake. The actual data is
 *          outside the content to make it readable without having to decrypt
 *          it.
 */
export type RedactionRoomEvent = RoomEvent<Record<string, never>> & Redaction;
/**
 * Check whether the format of a redaction event is valid.
 * @param event - The event to check.
 * @returns True if the event format is valid, otherwise false.
 */
export declare function isValidRedactionEvent(event: RoomEvent<unknown>): event is RedactionRoomEvent;
/**
 * Redacts an event in the current room.
 * @param widgetApi - An instance of the widget API.
 * @param eventId - The id of the event to redact.
 * @returns The redaction event that was send to the room.
 */
export declare function redactEvent(widgetApi: WidgetApi, eventId: string): Promise<RedactionRoomEvent>;
/**
 * Observes redaction events in the current room.
 * @param widgetApi - An instance of the widget API.
 * @returns An observable of validated redaction events.
 */
export declare function observeRedactionEvents(widgetApi: WidgetApi): Observable<RedactionRoomEvent>;