import { HeartbeatTypeEnum, VisitedActivityType, VisitedScreenEnum } from "../types/types";
export type HeartbeatProps = {
    id: string;
    sessionId: string;
    interval: number;
    type: HeartbeatTypeEnum;
    activity?: VisitedActivityType;
    screen?: VisitedScreenEnum;
};
declare class Heartbeat {
    private interval;
    private timeoutId;
    private sessionId;
    type: HeartbeatTypeEnum;
    screen: VisitedScreenEnum | undefined;
    activity: VisitedActivityType | undefined;
    isActive: boolean;
    id: string;
    constructor({ interval, type, id, activity, screen, sessionId }: HeartbeatProps);
    start(): Promise<boolean | null>;
    stop(onStop?: () => void): void;
    private sendHeartbeat;
}
export default Heartbeat;