import { z } from 'zod';
/**
 * UnixTimestamp, in this context, is a number that represents
 * the number of milliseconds since the Unix epoch (1970-01-01T00:00:00Z).
 */
export type UnixTimestamp = number & {
    __brand: 'UnixTimestamp';
};
export declare const unixTimeStampSchema: z.ZodBranded<z.ZodEffects<z.ZodNumber, UnixTimestamp, number>, "UnixTimestamp">;
/**
 * This function validates if a number is a valid Unix Timestamp, in milliseconds.
 * It is assumed the number will always be greater than 10^10 (1e10) to ensure it is in milliseconds.
 * Throws an error if the date is invalid.
 * @param milliseconds - The number to be validated.
 * @returns The given number as a UnixTimestamp.
 */
export declare function validateUnixTimestamp(milliseconds: number): UnixTimestamp;