interface OnlineSubscriptionOptions {
    checkIntervalMs: number;
    checkIntervalMsWhenOfflineMs: number;
}
type OnlineStatusSubscriptionListener = (props: GetOnlineStatusRequestResponse) => void;
type GetOnlineStatusRequestResponse = {
    isOnline: boolean;
    message?: string;
};
export declare const getOnlineStatusRequest: (timeoutMs: number) => Promise<GetOnlineStatusRequestResponse>;
declare class OnlineStatusSubscription {
    private onlineCheckTimeout;
    private readonly options;
    private activatedAt;
    private listeners;
    isOnline: boolean | null;
    constructor(options?: Partial<OnlineSubscriptionOptions> | undefined);
    private getPollingIntervalDuration;
    private getOnlineStatus;
    private pollOnlineStatus;
    start: () => void;
    stop: () => void;
    private emit;
    subscribe: (listener: OnlineStatusSubscriptionListener) => () => void;
    unsubscribe: (listener: OnlineStatusSubscriptionListener) => void;
}
export default OnlineStatusSubscription;
//# sourceMappingURL=online-status-subscription.service.d.ts.map