import { DateTime, DurationLikeObject } from 'luxon';
export declare function prepareQuery(payloadQuery: string): string;
/**
 * Tells whether the time `duration` is expired starting
 * from the `date` (ISO date format) at the moment of `now`.
 */
export declare function isDateExpired(currentTime: DateTime, initialTimestamp: string, duration: DurationLikeObject): boolean;