/**
 * Cryptographically secure random bytes.
 * @param {number} size
 * @returns {Buffer}
 */
export function randomBytes(size: number): Buffer;
/**
 * Constant-time buffer comparison. Returns false when lengths differ instead
 * of throwing (unlike `crypto.timingSafeEqual`), so it's safe on untrusted
 * inputs without leaking length via the exception path. Accepts strings for
 * caller convenience (UTF-8 bytes are compared).
 * @param {Buffer | Uint8Array | string} a
 * @param {Buffer | Uint8Array | string} b
 * @returns {boolean}
 */
export function timingSafeEqual(a: Buffer | Uint8Array | string, b: Buffer | Uint8Array | string): boolean;