/**
 * 获取几天前的起始时间戳
 * @param {boolean} n 几天前
 * @returns {number} 时间戳
 */
export declare function getDayStartTimestamp(n?: number, unit?: string): number;
/**
 * 获取几天前的终止时间戳
 * @param {boolean} n 几天前
 * @param {string} unit 返回时间戳的单位，默认是s(秒)
 * @param {string} endFlag 以什么单位作为结束时间，默认分钟，即23时59分0秒0毫秒
 * @returns {number} 时间戳
 */
export declare function getDayEndTimeStamp(n?: number, unit?: string, endFlag?: string): number;
export declare function getTodayStartTimestamp(unit?: string): number;
export declare function getTodayEndTimeStamp(unit?: string, endFlag?: string): number;
export declare function getYesterdayStartTimeStamp(unit?: string): number;
export declare function getYesterdayEndTimeStamp(unit?: string, endFlag?: string): number;
export declare function getDBYStartTimeStamp(unit?: string): number;
export declare function getDBYEndTimeStamp(unit?: string, endFlag?: string): number;
export declare function getSomeDayStartTimeStamp(date: string | number | Date, unit?: string): number;
export declare function getSomeDayEndTimeStamp(date: string | number | Date, unit?: string): number;