import { isString } from './isString.js';
/**
 * Checks if a string is a valid hexadecimal string. If a length is provided, it also checks that
 * the string has that length.
 */
export function isHexDecimal(payload, length) {
    if (!isString(payload))
        return false;
    if (!/^[0-9a-fA-F]+$/.test(payload))
        return false;
    return length === undefined || payload.length === length;
}