/*! firebase-admin v9.12.0 */
/*!
 * 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.
 */
/// <reference types="node" />
import { app } from '../firebase-namespace-api';
import * as rtdb from '@firebase/database-types';
/**
 * Gets the {@link database.Database `Database`} service for the default
 * app or a given app.
 *
 * `admin.database()` can be called with no arguments to access the default
 * app's {@link database.Database `Database`} service or as
 * `admin.database(app)` to access the
 * {@link database.Database `Database`} service associated with a specific
 * app.
 *
 * `admin.database` is also a namespace that can be used to access global
 * constants and methods associated with the `Database` service.
 *
 * @example
 * ```javascript
 * // Get the Database service for the default app
 * var defaultDatabase = admin.database();
 * ```
 *
 * @example
 * ```javascript
 * // Get the Database service for a specific app
 * var otherDatabase = admin.database(app);
 * ```
 *
 * @param App whose `Database` service to
 *   return. If not provided, the default `Database` service will be returned.
 *
 * @return The default `Database` service if no app
 *   is provided or the `Database` service associated with the provided app.
 */
export declare function database(app?: app.App): database.Database;
export declare namespace database {
    interface Database extends rtdb.FirebaseDatabase {
        /**
         * Gets the currently applied security rules as a string. The return value consists of
         * the rules source including comments.
         *
         * @return A promise fulfilled with the rules as a raw string.
         */
        getRules(): Promise<string>;
        /**
         * Gets the currently applied security rules as a parsed JSON object. Any comments in
         * the original source are stripped away.
         *
         * @return A promise fulfilled with the parsed rules object.
         */
        getRulesJSON(): Promise<object>;
        /**
         * Sets the specified rules on the Firebase Realtime Database instance. If the rules source is
         * specified as a string or a Buffer, it may include comments.
         *
         * @param source Source of the rules to apply. Must not be `null` or empty.
         * @return Resolves when the rules are set on the Realtime Database.
         */
        setRules(source: string | Buffer | object): Promise<void>;
    }
    export import DataSnapshot = rtdb.DataSnapshot;
    export import EventType = rtdb.EventType;
    export import OnDisconnect = rtdb.OnDisconnect;
    export import Query = rtdb.Query;
    export import Reference = rtdb.Reference;
    export import ThenableReference = rtdb.ThenableReference;
    export import enableLogging = rtdb.enableLogging;
    /**
     * [`ServerValue`](https://firebase.google.com/docs/reference/js/firebase.database.ServerValue)
     * module from the `@firebase/database` package.
     */
    const ServerValue: rtdb.ServerValue;
}