/// <reference types="node" />
import { EnqueuedJob, OnJobCallback } from '../../../types';
import Timeout = NodeJS.Timeout;
import { JobQueueBase } from '../job-queue-base';
export declare class FsQueue extends JobQueueBase {
    paused: boolean;
    started: boolean;
    interval: Timeout | null;
    filename: string;
    constructor(filename?: string);
    connectProducer(): void;
    disconnectProducer(): void;
    enqueue(job: EnqueuedJob): Promise<void> | void;
    startConsumer(onJob: OnJobCallback): void;
    readState(): Promise<boolean>;
    stopConsumer(): void;
}