/*! firebase-admin v12.6.0 */
/*!
 * Copyright 2020 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.
 */
import { Credential as TCredential, applicationDefault as applicationDefaultFn, cert as certFn, refreshToken as refreshTokenFn } from '../app/index';
export { ServiceAccount, GoogleOAuthAccessToken } from '../app/index';
export declare namespace credential {
    /**
     * Interface that provides Google OAuth2 access tokens used to authenticate
     * with Firebase services.
     *
     * In most cases, you will not need to implement this yourself and can instead
     * use the default implementations provided by the `admin.credential` namespace.
     */
    type Credential = TCredential;
    /**
     * Returns a credential created from the
     * {@link https://developers.google.com/identity/protocols/application-default-credentials |
     * Google Application Default Credentials}
     * that grants admin access to Firebase services. This credential can be used
     * in the call to {@link firebase-admin.app#initializeApp}.
     *
     * Google Application Default Credentials are available on any Google
     * infrastructure, such as Google App Engine and Google Compute Engine.
     *
     * See
     * {@link https://firebase.google.com/docs/admin/setup#initialize_the_sdk | Initialize the SDK}
     * for more details.
     *
     * @example
     * ```javascript
     * admin.initializeApp({
     *   credential: admin.credential.applicationDefault(),
     *   databaseURL: "https://<DATABASE_NAME>.firebaseio.com"
     * });
     * ```
     *
     * @param httpAgent - Optional {@link https://nodejs.org/api/http.html#http_class_http_agent | HTTP Agent}
     *   to be used when retrieving access tokens from Google token servers.
     *
     * @returns A credential authenticated via Google
     *   Application Default Credentials that can be used to initialize an app.
     */
    const applicationDefault: typeof applicationDefaultFn;
    /**
     * Returns a credential created from the provided service account that grants
     * admin access to Firebase services. This credential can be used in the call
     * to {@link firebase-admin.app#initializeApp}.
     *
     * See
     * {@link https://firebase.google.com/docs/admin/setup#initialize_the_sdk | Initialize the SDK}
     * for more details.
     *
     * @example
     * ```javascript
     * // Providing a path to a service account key JSON file
     * var serviceAccount = require("path/to/serviceAccountKey.json");
     * admin.initializeApp({
     *   credential: admin.credential.cert(serviceAccount),
     *   databaseURL: "https://<DATABASE_NAME>.firebaseio.com"
     * });
     * ```
     *
     * @example
     * ```javascript
     * // Providing a service account object inline
     * admin.initializeApp({
     *   credential: admin.credential.cert({
     *     projectId: "<PROJECT_ID>",
     *     clientEmail: "foo@<PROJECT_ID>.iam.gserviceaccount.com",
     *     privateKey: "-----BEGIN PRIVATE KEY-----<KEY>-----END PRIVATE KEY-----\n"
     *   }),
     *   databaseURL: "https://<DATABASE_NAME>.firebaseio.com"
     * });
     * ```
     *
     * @param serviceAccountPathOrObject - The path to a service
     *   account key JSON file or an object representing a service account key.
     * @param httpAgent - Optional {@link https://nodejs.org/api/http.html#http_class_http_agent | HTTP Agent}
     *   to be used when retrieving access tokens from Google token servers.
     *
     * @returns A credential authenticated via the
     *   provided service account that can be used to initialize an app.
     */
    const cert: typeof certFn;
    /**
     * Returns a credential created from the provided refresh token that grants
     * admin access to Firebase services. This credential can be used in the call
     * to {@link firebase-admin.app#initializeApp}.
     *
     * See
     * {@link https://firebase.google.com/docs/admin/setup#initialize_the_sdk | Initialize the SDK}
     * for more details.
     *
     * @example
     * ```javascript
     * // Providing a path to a refresh token JSON file
     * var refreshToken = require("path/to/refreshToken.json");
     * admin.initializeApp({
     *   credential: admin.credential.refreshToken(refreshToken),
     *   databaseURL: "https://<DATABASE_NAME>.firebaseio.com"
     * });
     * ```
     *
     * @param refreshTokenPathOrObject - The path to a Google
     *   OAuth2 refresh token JSON file or an object representing a Google OAuth2
     *   refresh token.
     * @param httpAgent - Optional {@link https://nodejs.org/api/http.html#http_class_http_agent | HTTP Agent}
     *   to be used when retrieving access tokens from Google token servers.
     *
     * @returns A credential authenticated via the
     *   provided service account that can be used to initialize an app.
     */
    const refreshToken: typeof refreshTokenFn;
}
