/**
 * @license
 * Copyright 2017 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.
 */
export declare const PROTOCOL_VERSION = "5";
export declare const VERSION_PARAM = "v";
export declare const TRANSPORT_SESSION_PARAM = "s";
export declare const REFERER_PARAM = "r";
export declare const FORGE_REF = "f";
export declare const FORGE_DOMAIN_RE: RegExp;
export declare const LAST_SESSION_PARAM = "ls";
export declare const APPLICATION_ID_PARAM = "p";
export declare const APP_CHECK_TOKEN_PARAM = "ac";
export declare const WEBSOCKET = "websocket";
export declare const LONG_POLLING = "long_polling";