'use strict';

const crypto = require('crypto');

/** Random UUID v4. */
function uuid() {
  return crypto.randomUUID();
}

/** Random opaque token (invites, stream keys). */
function token(bytes = 24) {
  return crypto.randomBytes(bytes).toString('hex');
}

/** Constant-time string comparison. */
function safeEqual(a, b) {
  const ba = Buffer.from(String(a));
  const bb = Buffer.from(String(b));
  return ba.length === bb.length && crypto.timingSafeEqual(ba, bb);
}

module.exports = { uuid, token, safeEqual };