/**
 * @param {number} [len] length of salt
 * @returns {string} generated salt
 */
export function genSalt(len?: number | undefined): string;
/**
 * @description validate salt
 * @param {string | undefined} salt provided salt
 * @returns {string} a valid salt
 */
export default function validateSalt(salt: string | undefined): string;
/**
 * @description maximum length of salt
 * @type {16}
 */
export const maxSaltLength: 16;