/**
 * Client for TWS (Teambition Web Service) cloud messaging service..
 */
export declare class TCMClient {
    private _client;
    constructor(options: TCMOptions);
    /**
     * subscribe a topic with given sessionId.
     * @param topic message topic.
     * @param sessionId user session ID.
     */
    subscribe(topic: string, sessionId: string): Promise<void>;
    /**
     * unsubscribe a topic with given sessionId.
     * @param topic message topic.
     * @param sessionId user session ID.
     */
    unsubscribe(topic: string, sessionId: string): Promise<void>;
    /**
     * send one or more messages.
     * @param body message array.
     */
    send(body: Message[]): Promise<void>;
    /**
     * get online info for given user.
     * @param userId user ID.
     */
    getUserClients(userId: string): Promise<UserClients>;
    /**
     * get a TCM token for given user.
     * @param userId user ID.
     * @param source client label.
     */
    sign(userId: string, source: string): Promise<Token>;
    /**
     * Just heart beat.
     */
    heartBeat(): Promise<HeartBeat>;
}