/**
 * @license
 * 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.
 */
import { IdTokenResult, ParsedToken, User } from '../../model/public_types';
/**
 * Returns a JSON Web Token (JWT) used to identify the user to a Firebase service.
 *
 * @remarks
 * Returns the current token if it has not expired or if it will not expire in the next five
 * minutes. Otherwise, this will refresh the token and return a new one.
 *
 * @param user - The user.
 * @param forceRefresh - Force refresh regardless of token expiration.
 *
 * @public
 */
export declare function getIdToken(user: User, forceRefresh?: boolean): Promise<string>;
/**
 * Returns a deserialized JSON Web Token (JWT) used to identitfy the user to a Firebase service.
 *
 * @remarks
 * Returns the current token if it has not expired or if it will not expire in the next five
 * minutes. Otherwise, this will refresh the token and return a new one.
 *
 * @param user - The user.
 * @param forceRefresh - Force refresh regardless of token expiration.
 *
 * @public
 */
export declare function getIdTokenResult(user: User, forceRefresh?: boolean): Promise<IdTokenResult>;
export declare function _parseToken(token: string): ParsedToken | null;
/**
 * Extract expiresIn TTL from a token by subtracting the expiration from the issuance.
 */
export declare function _tokenExpiresIn(token: string): number;
