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<?php
/*
* Copyright 2020 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.
*/
namespace Google\Auth;
/**
* Describes a Credentials object which supports updating request metadata
* (request headers).
*/
interface UpdateMetadataInterface
{
const AUTH_METADATA_KEY = 'authorization';
/**
* Updates metadata with the authorization token.
*
* @param array<mixed> $metadata metadata hashmap
* @param string $authUri optional auth uri
* @param callable $httpHandler callback which delivers psr7 request
* @return array<mixed> updated metadata hashmap
*/
public function updateMetadata(
$metadata,
$authUri = null,
callable $httpHandler = null
);
}
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