import { EventEmitter } from "events";
import { Capability } from "./interfaces/Capabilities";
import { ApiVersion } from "./interfaces/ApiVersion";
import { ITransport } from "./transport/ITransport";
import { IStickerActionRequestData } from "./interfaces/StickerAction";
import { IOpenIDCredentials } from "./interfaces/GetOpenIDAction";
import { WidgetType } from "./interfaces/WidgetType";
import { IModalWidgetCreateData, IModalWidgetOpenRequestDataButton, IModalWidgetReturnData, ModalButtonID } from "./interfaces/ModalWidgetActions";
import { ISendEventFromWidgetResponseData } from "./interfaces/SendEventAction";
import { ISendToDeviceFromWidgetResponseData } from "./interfaces/SendToDeviceAction";
import { IRoomEvent } from "./interfaces/IRoomEvent";
import { ITurnServer } from "./interfaces/TurnServerActions";
import { Symbols } from "./Symbols";
import { IReadRelationsFromWidgetResponseData } from "./interfaces/ReadRelationsAction";
import { IUserDirectorySearchFromWidgetResponseData } from "./interfaces/UserDirectorySearchAction";
/**
 * API handler for widgets. This raises events for each action
 * received as `action:${action}` (eg: "action:screenshot").
 * Default handling can be prevented by using preventDefault()
 * on the raised event. The default handling varies for each
 * action: ones which the SDK can handle safely are acknowledged
 * appropriately and ones which are unhandled (custom or require
 * the widget to do something) are rejected with an error.
 *
 * Events which are preventDefault()ed must reply using the
 * transport. The events raised will have a detail of an
 * IWidgetApiRequest interface.
 *
 * When the WidgetApi is ready to start sending requests, it will
 * raise a "ready" CustomEvent. After the ready event fires, actions
 * can be sent and the transport will be ready.
 */
export declare class WidgetApi extends EventEmitter {
    private clientOrigin;
    readonly transport: ITransport;
    private capabilitiesFinished;
    private supportsMSC2974Renegotiate;
    private requestedCapabilities;
    private approvedCapabilities?;
    private cachedClientVersions?;
    private turnServerWatchers;
    /**
     * Creates a new API handler for the given widget.
     * @param {string} widgetId The widget ID to listen for. If not supplied then
     * the API will use the widget ID from the first valid request it receives.
     * @param {string} clientOrigin The origin of the client, or null if not known.
     */
    constructor(widgetId?: string | null, clientOrigin?: string | null);
    /**
     * Determines if the widget was granted a particular capability. Note that on
     * clients where the capabilities are not fed back to the widget this function
     * will rely on requested capabilities instead.
     * @param {Capability} capability The capability to check for approval of.
     * @returns {boolean} True if the widget has approval for the given capability.
     */
    hasCapability(capability: Capability): boolean;
    /**
     * Request a capability from the client. It is not guaranteed to be allowed,
     * but will be asked for.
     * @param {Capability} capability The capability to request.
     * @throws Throws if the capabilities negotiation has already started and the
     * widget is unable to request additional capabilities.
     */
    requestCapability(capability: Capability): void;
    /**
     * Request capabilities from the client. They are not guaranteed to be allowed,
     * but will be asked for if the negotiation has not already happened.
     * @param {Capability[]} capabilities The capabilities to request.
     * @throws Throws if the capabilities negotiation has already started.
     */
    requestCapabilities(capabilities: Capability[]): void;
    /**
     * Requests the capability to interact with rooms other than the user's currently
     * viewed room. Applies to event receiving and sending.
     * @param {string | Symbols.AnyRoom} roomId The room ID, or `Symbols.AnyRoom` to
     * denote all known rooms.
     */
    requestCapabilityForRoomTimeline(roomId: string | Symbols.AnyRoom): void;
    /**
     * Requests the capability to send a given state event with optional explicit
     * state key. It is not guaranteed to be allowed, but will be asked for if the
     * negotiation has not already happened.
     * @param {string} eventType The state event type to ask for.
     * @param {string} stateKey If specified, the specific state key to request.
     * Otherwise all state keys will be requested.
     */
    requestCapabilityToSendState(eventType: string, stateKey?: string): void;
    /**
     * Requests the capability to receive a given state event with optional explicit
     * state key. It is not guaranteed to be allowed, but will be asked for if the
     * negotiation has not already happened.
     * @param {string} eventType The state event type to ask for.
     * @param {string} stateKey If specified, the specific state key to request.
     * Otherwise all state keys will be requested.
     */
    requestCapabilityToReceiveState(eventType: string, stateKey?: string): void;
    /**
     * Requests the capability to send a given to-device event. It is not
     * guaranteed to be allowed, but will be asked for if the negotiation has
     * not already happened.
     * @param {string} eventType The room event type to ask for.
     */
    requestCapabilityToSendToDevice(eventType: string): void;
    /**
     * Requests the capability to receive a given to-device event. It is not
     * guaranteed to be allowed, but will be asked for if the negotiation has
     * not already happened.
     * @param {string} eventType The room event type to ask for.
     */
    requestCapabilityToReceiveToDevice(eventType: string): void;
    /**
     * Requests the capability to send a given room event. It is not guaranteed to be
     * allowed, but will be asked for if the negotiation has not already happened.
     * @param {string} eventType The room event type to ask for.
     */
    requestCapabilityToSendEvent(eventType: string): void;
    /**
     * Requests the capability to receive a given room event. It is not guaranteed to be
     * allowed, but will be asked for if the negotiation has not already happened.
     * @param {string} eventType The room event type to ask for.
     */
    requestCapabilityToReceiveEvent(eventType: string): void;
    /**
     * Requests the capability to send a given message event with optional explicit
     * `msgtype`. It is not guaranteed to be allowed, but will be asked for if the
     * negotiation has not already happened.
     * @param {string} msgtype If specified, the specific msgtype to request.
     * Otherwise all message types will be requested.
     */
    requestCapabilityToSendMessage(msgtype?: string): void;
    /**
     * Requests the capability to receive a given message event with optional explicit
     * `msgtype`. It is not guaranteed to be allowed, but will be asked for if the
     * negotiation has not already happened.
     * @param {string} msgtype If specified, the specific msgtype to request.
     * Otherwise all message types will be requested.
     */
    requestCapabilityToReceiveMessage(msgtype?: string): void;
    /**
     * Requests an OpenID Connect token from the client for the currently logged in
     * user. This token can be validated server-side with the federation API. Note
     * that the widget is responsible for validating the token and caching any results
     * it needs.
     * @returns {Promise<IOpenIDCredentials>} Resolves to a token for verification.
     * @throws Throws if the user rejected the request or the request failed.
     */
    requestOpenIDConnectToken(): Promise<IOpenIDCredentials>;
    /**
     * Asks the client for additional capabilities. Capabilities can be queued for this
     * request with the requestCapability() functions.
     * @returns {Promise<void>} Resolves when complete. Note that the promise resolves when
     * the capabilities request has gone through, not when the capabilities are approved/denied.
     * Use the WidgetApiToWidgetAction.NotifyCapabilities action to detect changes.
     */
    updateRequestedCapabilities(): Promise<void>;
    /**
     * Tell the client that the content has been loaded.
     * @returns {Promise} Resolves when the client acknowledges the request.
     */
    sendContentLoaded(): Promise<void>;
    /**
     * Sends a sticker to the client.
     * @param {IStickerActionRequestData} sticker The sticker to send.
     * @returns {Promise} Resolves when the client acknowledges the request.
     */
    sendSticker(sticker: IStickerActionRequestData): Promise<void>;
    /**
     * Asks the client to set the always-on-screen status for this widget.
     * @param {boolean} value The new state to request.
     * @returns {Promise<boolean>} Resolve with true if the client was able to fulfill
     * the request, resolves to false otherwise. Rejects if an error occurred.
     */
    setAlwaysOnScreen(value: boolean): Promise<boolean>;
    /**
     * Opens a modal widget.
     * @param {string} url The URL to the modal widget.
     * @param {string} name The name of the widget.
     * @param {IModalWidgetOpenRequestDataButton[]} buttons The buttons to have on the widget.
     * @param {IModalWidgetCreateData} data Data to supply to the modal widget.
     * @param {WidgetType} type The type of modal widget.
     * @returns {Promise<void>} Resolves when the modal widget has been opened.
     */
    openModalWidget(url: string, name: string, buttons?: IModalWidgetOpenRequestDataButton[], data?: IModalWidgetCreateData, type?: WidgetType): Promise<void>;
    /**
     * Closes the modal widget. The widget's session will be terminated shortly after.
     * @param {IModalWidgetReturnData} data Optional data to close the modal widget with.
     * @returns {Promise<void>} Resolves when complete.
     */
    closeModalWidget(data?: IModalWidgetReturnData): Promise<void>;
    sendRoomEvent(eventType: string, content: unknown, roomId?: string): Promise<ISendEventFromWidgetResponseData>;
    sendStateEvent(eventType: string, stateKey: string, content: unknown, roomId?: string): Promise<ISendEventFromWidgetResponseData>;
    /**
     * Sends a to-device event.
     * @param {string} eventType The type of events being sent.
     * @param {boolean} encrypted Whether to encrypt the message contents.
     * @param {Object} contentMap A map from user IDs to device IDs to message contents.
     * @returns {Promise<ISendToDeviceFromWidgetResponseData>} Resolves when complete.
     */
    sendToDevice(eventType: string, encrypted: boolean, contentMap: {
        [userId: string]: {
            [deviceId: string]: object;
        };
    }): Promise<ISendToDeviceFromWidgetResponseData>;
    readRoomEvents(eventType: string, limit?: number, msgtype?: string, roomIds?: (string | Symbols.AnyRoom)[]): Promise<IRoomEvent[]>;
    /**
     * Reads all related events given a known eventId.
     * @param eventId The id of the parent event to be read.
     * @param roomId The room to look within. When undefined, the user's currently
     * viewed room.
     * @param relationType The relationship type of child events to search for.
     * When undefined, all relations are returned.
     * @param eventType The event type of child events to search for. When undefined,
     * all related events are returned.
     * @param limit The maximum number of events to retrieve per room. If not
     * supplied, the server will apply a default limit.
     * @param from The pagination token to start returning results from, as
     * received from a previous call. If not supplied, results start at the most
     * recent topological event known to the server.
     * @param to The pagination token to stop returning results at. If not
     * supplied, results continue up to limit or until there are no more events.
     * @param direction The direction to search for according to MSC3715.
     * @returns Resolves to the room relations.
     */
    readEventRelations(eventId: string, roomId?: string, relationType?: string, eventType?: string, limit?: number, from?: string, to?: string, direction?: 'f' | 'b'): Promise<IReadRelationsFromWidgetResponseData>;
    readStateEvents(eventType: string, limit?: number, stateKey?: string, roomIds?: (string | Symbols.AnyRoom)[]): Promise<IRoomEvent[]>;
    /**
     * Sets a button as disabled or enabled on the modal widget. Buttons are enabled by default.
     * @param {ModalButtonID} buttonId The button ID to enable/disable.
     * @param {boolean} isEnabled Whether or not the button is enabled.
     * @returns {Promise<void>} Resolves when complete.
     * @throws Throws if the button cannot be disabled, or the client refuses to disable the button.
     */
    setModalButtonEnabled(buttonId: ModalButtonID, isEnabled: boolean): Promise<void>;
    /**
     * Attempts to navigate the client to the given URI. This can only be called with Matrix URIs
     * (currently only matrix.to, but in future a Matrix URI scheme will be defined).
     * @param {string} uri The URI to navigate to.
     * @returns {Promise<void>} Resolves when complete.
     * @throws Throws if the URI is invalid or cannot be processed.
     * @deprecated This currently relies on an unstable MSC (MSC2931).
     */
    navigateTo(uri: string): Promise<void>;
    /**
     * Starts watching for TURN servers, yielding an initial set of credentials as soon as possible,
     * and thereafter yielding new credentials whenever the previous ones expire.
     * @yields {ITurnServer} The TURN server URIs and credentials currently available to the widget.
     */
    getTurnServers(): AsyncGenerator<ITurnServer>;
    /**
     * Search for users in the user directory.
     * @param searchTerm The term to search for.
     * @param limit The maximum number of results to return. If not supplied, the
     * @returns Resolves to the search results.
     */
    searchUserDirectory(searchTerm: string, limit?: number): Promise<IUserDirectorySearchFromWidgetResponseData>;
    /**
     * Starts the communication channel. This should be done early to ensure
     * that messages are not missed. Communication can only be stopped by the client.
     */
    start(): void;
    private handleMessage;
    private replyVersions;
    getClientVersions(): Promise<ApiVersion[]>;
    private handleCapabilities;
}