/** @module epoch-seconds
 */
declare module "epoch-seconds" {
    /**
     * @function
     * @param {number} [compareValue]
     * @returns {number} Seconds passed since Unix epoch (01 January 1970)
     * @example
     * import epochSeconds from "epoch-seconds"
     * const result = epochSeconds()
     * result === 1549410770
     * setTimeout(() => {
     *   const result2 = epochSeconds(result)
     *   result2 === 3
     * }, 3000)
     */
    export default function(compareValue?: number): number;
}