import StateStore from '../state-store';
import { TurmsNotification } from '../../model/proto/notification/turms_notification';
import BaseService from './base-service';
export default class HeartbeatService extends BaseService {
    private static readonly DEFAULT_HEARTBEAT_INTERVAL;
    private static readonly HEARTBEAT_FAILURE_REQUEST_ID;
    private static readonly HEARTBEAT_REQUEST;
    private readonly _heartbeatInterval;
    private readonly _heartbeatTimerInterval;
    private _lastHeartbeatRequestDate;
    private _heartbeatTimer?;
    private _heartbeatPromises;
    constructor(stateStore: StateStore, heartbeatInterval?: number);
    get isRunning(): boolean;
    start(): void;
    stop(): void;
    send(): Promise<void>;
    resolveHeartbeatPromises(): void;
    rejectHeartbeatPromisesIfFail(notification: TurmsNotification): boolean;
    private _rejectHeartbeatPromises;
    close(): Promise<void>;
    onDisconnected(error?: Error): void;
}
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