# wp-stateless/2.1.4/lib/Google/vendor/google/auth/src/FetchAuthTokenInterface.php

WP-Stateless – Google Cloud Storage, version 2.1.4. 56 lines.

- Page: https://pluginprobe.com/plugins/wp-stateless/2.1.4/code/lib/Google/vendor/google/auth/src/FetchAuthTokenInterface.php
- Raw: https://pluginprobe.com/plugins/wp-stateless/2.1.4/raw/lib/Google/vendor/google/auth/src/FetchAuthTokenInterface.php
- Modified: 2018-04-06T08:15:54+00:00

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```php
<?php
/*
 * Copyright 2015 Google Inc.
 *
 * 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.
 */

namespace Google\Auth;

/**
 * An interface implemented by objects that can fetch auth tokens.
 */
interface FetchAuthTokenInterface
{

 /**
  * Fetches the auth tokens based on the current state.
  *
  * @param callable $httpHandler callback which delivers psr7 request
  * @return array a hash of auth tokens
  */
  public function fetchAuthToken(callable $httpHandler = null);

 /**
  * Obtains a key that can used to cache the results of #fetchAuthToken.
  *
  * If the value is empty, the auth token is not cached.
  *
  * @return string a key that may be used to cache the auth token.
  */
  public function getCacheKey();

  /**
   * Returns an associative array with the token and
   * expiration time.
   *
   * @return null|array {
   *      The last received access token.
   *
   *      @type string $access_token The access token string.
   *      @type int $expires_at The time the token expires as a UNIX timestamp.
   * }
   */
  public function getLastReceivedToken();
}

```