import { CronJob, CronJobParameters } from 'cron';
import { StatsResult } from '../stats/stats.interface';
export declare class CronHelper {
    private static readonly redis;
    static crons: {};
    static nextTime(cronTime: string): {
        next: Date;
        calendar: string;
        fromNow: string;
    };
    static reg<Value extends any>(operation: string, cronTime: string, handler: () => Promise<StatsResult<Value> | any>, opts?: Omit<CronJobParameters, 'cronTime' | 'onTick'> & {
        ttl?: number;
    }): CronJob;
}