/**
 * Helper counts current delta for countdown
 * @param {number} startTimestamp - Start timestamp
 *
 * @returns {number} Delta for countdown
 */
export declare const getDelta: (startTimestamp: number) => number;
/**
 * Helper formats time
 * @param {number} milliseconds - Time in milliseconds
 * @param {string} format - Format to convert
 *
 * @returns {string} Formatted time
 */
export declare const formatTime: (milliseconds: number, format?: string) => string;