app/lib/server-token-validator.ts

/**
 * Copyright 2023 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {app} from '@/app/lib/firebase-server-initialization';
import {Tokens} from '@/app/types';
import {getAuth} from 'firebase-admin/auth';
import {getAppCheck} from 'firebase-admin/app-check';

export async function validateTokens(tokens: Tokens) {
  const {userToken, appCheckToken} = tokens;
  const [authUser] = await Promise.all([
    getAuth(app).verifyIdToken(userToken),
    getAppCheck(app).verifyToken(appCheckToken),
  ]);
  return authUser;
};