packages/fxa-profile-server/lib/validate.js

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

exports.hex = /^(?:[0-9a-f]{2})+$/;