/*! 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.
 */
import { app, FirebaseError, FirebaseArrayIndexError } from '../firebase-namespace-api';
/**
 * Gets the {@link messaging.Messaging `Messaging`} service for the
 * default app or a given app.
 *
 * `admin.messaging()` can be called with no arguments to access the default
 * app's {@link messaging.Messaging `Messaging`} service or as
 * `admin.messaging(app)` to access the
 * {@link messaging.Messaging `Messaging`} service associated with a
 * specific app.
 *
 * @example
 * ```javascript
 * // Get the Messaging service for the default app
 * var defaultMessaging = admin.messaging();
 * ```
 *
 * @example
 * ```javascript
 * // Get the Messaging service for a given app
 * var otherMessaging = admin.messaging(otherApp);
 * ```
 *
 * @param app Optional app whose `Messaging` service to
 *   return. If not provided, the default `Messaging` service will be returned.
 *
 * @return The default `Messaging` service if no
 *   app is provided or the `Messaging` service associated with the provided
 *   app.
 */
export declare function messaging(app?: app.App): messaging.Messaging;
export declare namespace messaging {
    interface BaseMessage {
        data?: {
            [key: string]: string;
        };
        notification?: Notification;
        android?: AndroidConfig;
        webpush?: WebpushConfig;
        apns?: ApnsConfig;
        fcmOptions?: FcmOptions;
    }
    export interface TokenMessage extends BaseMessage {
        token: string;
    }
    export interface TopicMessage extends BaseMessage {
        topic: string;
    }
    export interface ConditionMessage extends BaseMessage {
        condition: string;
    }
    /**
     * Payload for the `admin.messaging.send()` operation. The payload contains all the fields
     * in the `BaseMessage` type, and exactly one of token, topic or condition.
     */
    export type Message = TokenMessage | TopicMessage | ConditionMessage;
    /**
     * Payload for the `admin.messaging.sendMulticast()` method. The payload contains all the fields
     * in the `BaseMessage` type, and a list of tokens.
     */
    export interface MulticastMessage extends BaseMessage {
        tokens: string[];
    }
    /**
     * A notification that can be included in {@link messaging.Message}.
     */
    export interface Notification {
        /**
         * The title of the notification.
         */
        title?: string;
        /**
         * The notification body
         */
        body?: string;
        /**
         * URL of an image to be displayed in the notification.
         */
        imageUrl?: string;
    }
    /**
     * Represents platform-independent options for features provided by the FCM SDKs.
     */
    export interface FcmOptions {
        /**
         * The label associated with the message's analytics data.
         */
        analyticsLabel?: string;
    }
    /**
     * Represents the WebPush protocol options that can be included in an
     * {@link messaging.Message}.
     */
    export interface WebpushConfig {
        /**
         * A collection of WebPush headers. Header values must be strings.
         *
         * See [WebPush specification](https://tools.ietf.org/html/rfc8030#section-5)
         * for supported headers.
         */
        headers?: {
            [key: string]: string;
        };
        /**
         * A collection of data fields.
         */
        data?: {
            [key: string]: string;
        };
        /**
         * A WebPush notification payload to be included in the message.
         */
        notification?: WebpushNotification;
        /**
         * Options for features provided by the FCM SDK for Web.
         */
        fcmOptions?: WebpushFcmOptions;
    }
    /** Represents options for features provided by the FCM SDK for Web
     * (which are not part of the Webpush standard).
     */
    export interface WebpushFcmOptions {
        /**
         * The link to open when the user clicks on the notification.
         * For all URL values, HTTPS is required.
         */
        link?: string;
    }
    /**
     * Represents the WebPush-specific notification options that can be included in
     * {@link messaging.WebpushConfig}. This supports most of the standard
     * options as defined in the Web Notification
     * [specification](https://developer.mozilla.org/en-US/docs/Web/API/notification/Notification).
     */
    export interface WebpushNotification {
        /**
         * Title text of the notification.
         */
        title?: string;
        /**
         * An array of notification actions representing the actions
         * available to the user when the notification is presented.
         */
        actions?: Array<{
            /**
             * An action available to the user when the notification is presented
             */
            action: string;
            /**
             * Optional icon for a notification action.
             */
            icon?: string;
            /**
             * Title of the notification action.
             */
            title: string;
        }>;
        /**
         * URL of the image used to represent the notification when there is
         * not enough space to display the notification itself.
         */
        badge?: string;
        /**
         * Body text of the notification.
         */
        body?: string;
        /**
         * Arbitrary data that you want associated with the notification.
         * This can be of any data type.
         */
        data?: any;
        /**
         * The direction in which to display the notification. Must be one
         * of `auto`, `ltr` or `rtl`.
         */
        dir?: 'auto' | 'ltr' | 'rtl';
        /**
         * URL to the notification icon.
         */
        icon?: string;
        /**
         * URL of an image to be displayed in the notification.
         */
        image?: string;
        /**
         * The notification's language as a BCP 47 language tag.
         */
        lang?: string;
        /**
         * A boolean specifying whether the user should be notified after a
         * new notification replaces an old one. Defaults to false.
         */
        renotify?: boolean;
        /**
         * Indicates that a notification should remain active until the user
         * clicks or dismisses it, rather than closing automatically.
         * Defaults to false.
         */
        requireInteraction?: boolean;
        /**
         * A boolean specifying whether the notification should be silent.
         * Defaults to false.
         */
        silent?: boolean;
        /**
         * An identifying tag for the notification.
         */
        tag?: string;
        /**
         * Timestamp of the notification. Refer to
         * https://developer.mozilla.org/en-US/docs/Web/API/notification/timestamp
         * for details.
         */
        timestamp?: number;
        /**
         * A vibration pattern for the device's vibration hardware to emit
         * when the notification fires.
         */
        vibrate?: number | number[];
        [key: string]: any;
    }
    /**
     * Represents the APNs-specific options that can be included in an
     * {@link messaging.Message}. Refer to
     * [Apple documentation](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CommunicatingwithAPNs.html)
     * for various headers and payload fields supported by APNs.
     */
    export interface ApnsConfig {
        /**
         * A collection of APNs headers. Header values must be strings.
         */
        headers?: {
            [key: string]: string;
        };
        /**
         * An APNs payload to be included in the message.
         */
        payload?: ApnsPayload;
        /**
         * Options for features provided by the FCM SDK for iOS.
         */
        fcmOptions?: ApnsFcmOptions;
    }
    /**
     * Represents the payload of an APNs message. Mainly consists of the `aps`
     * dictionary. But may also contain other arbitrary custom keys.
     */
    export interface ApnsPayload {
        /**
         * The `aps` dictionary to be included in the message.
         */
        aps: Aps;
        [customData: string]: any;
    }
    /**
     * Represents the [aps dictionary](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/PayloadKeyReference.html)
     * that is part of APNs messages.
     */
    export interface Aps {
        /**
         * Alert to be included in the message. This may be a string or an object of
         * type `admin.messaging.ApsAlert`.
         */
        alert?: string | ApsAlert;
        /**
         * Badge to be displayed with the message. Set to 0 to remove the badge. When
         * not specified, the badge will remain unchanged.
         */
        badge?: number;
        /**
         * Sound to be played with the message.
         */
        sound?: string | CriticalSound;
        /**
         * Specifies whether to configure a background update notification.
         */
        contentAvailable?: boolean;
        /**
         * Specifies whether to set the `mutable-content` property on the message
         * so the clients can modify the notification via app extensions.
         */
        mutableContent?: boolean;
        /**
         * Type of the notification.
         */
        category?: string;
        /**
         * An app-specific identifier for grouping notifications.
         */
        threadId?: string;
        [customData: string]: any;
    }
    export interface ApsAlert {
        title?: string;
        subtitle?: string;
        body?: string;
        locKey?: string;
        locArgs?: string[];
        titleLocKey?: string;
        titleLocArgs?: string[];
        subtitleLocKey?: string;
        subtitleLocArgs?: string[];
        actionLocKey?: string;
        launchImage?: string;
    }
    /**
     * Represents a critical sound configuration that can be included in the
     * `aps` dictionary of an APNs payload.
     */
    export interface CriticalSound {
        /**
         * The critical alert flag. Set to `true` to enable the critical alert.
         */
        critical?: boolean;
        /**
         * The name of a sound file in the app's main bundle or in the `Library/Sounds`
         * folder of the app's container directory. Specify the string "default" to play
         * the system sound.
         */
        name: string;
        /**
         * The volume for the critical alert's sound. Must be a value between 0.0
         * (silent) and 1.0 (full volume).
         */
        volume?: number;
    }
    /**
     * Represents options for features provided by the FCM SDK for iOS.
     */
    export interface ApnsFcmOptions {
        /**
         * The label associated with the message's analytics data.
         */
        analyticsLabel?: string;
        /**
         * URL of an image to be displayed in the notification.
         */
        imageUrl?: string;
    }
    /**
     * Represents the Android-specific options that can be included in an
     * {@link messaging.Message}.
     */
    export interface AndroidConfig {
        /**
         * Collapse key for the message. Collapse key serves as an identifier for a
         * group of messages that can be collapsed, so that only the last message gets
         * sent when delivery can be resumed. A maximum of four different collapse keys
         * may be active at any given time.
         */
        collapseKey?: string;
        /**
         * Priority of the message. Must be either `normal` or `high`.
         */
        priority?: ('high' | 'normal');
        /**
         * Time-to-live duration of the message in milliseconds.
         */
        ttl?: number;
        /**
         * Package name of the application where the registration tokens must match
         * in order to receive the message.
         */
        restrictedPackageName?: string;
        /**
         * A collection of data fields to be included in the message. All values must
         * be strings. When provided, overrides any data fields set on the top-level
         * `admin.messaging.Message`.}
         */
        data?: {
            [key: string]: string;
        };
        /**
         * Android notification to be included in the message.
         */
        notification?: AndroidNotification;
        /**
         * Options for features provided by the FCM SDK for Android.
         */
        fcmOptions?: AndroidFcmOptions;
    }
    /**
      * Represents the Android-specific notification options that can be included in
      * {@link messaging.AndroidConfig}.
      */
    export interface AndroidNotification {
        /**
         * Title of the Android notification. When provided, overrides the title set via
         * `admin.messaging.Notification`.
         */
        title?: string;
        /**
         * Body of the Android notification. When provided, overrides the body set via
         * `admin.messaging.Notification`.
         */
        body?: string;
        /**
         * Icon resource for the Android notification.
         */
        icon?: string;
        /**
         * Notification icon color in `#rrggbb` format.
         */
        color?: string;
        /**
         * File name of the sound to be played when the device receives the
         * notification.
         */
        sound?: string;
        /**
         * Notification tag. This is an identifier used to replace existing
         * notifications in the notification drawer. If not specified, each request
         * creates a new notification.
         */
        tag?: string;
        /**
         * URL of an image to be displayed in the notification.
         */
        imageUrl?: string;
        /**
         * Action associated with a user click on the notification. If specified, an
         * activity with a matching Intent Filter is launched when a user clicks on the
         * notification.
         */
        clickAction?: string;
        /**
         * Key of the body string in the app's string resource to use to localize the
         * body text.
         *
         */
        bodyLocKey?: string;
        /**
         * An array of resource keys that will be used in place of the format
         * specifiers in `bodyLocKey`.
         */
        bodyLocArgs?: string[];
        /**
         * Key of the title string in the app's string resource to use to localize the
         * title text.
         */
        titleLocKey?: string;
        /**
         * An array of resource keys that will be used in place of the format
         * specifiers in `titleLocKey`.
         */
        titleLocArgs?: string[];
        /**
         * The Android notification channel ID (new in Android O). The app must create
         * a channel with this channel ID before any notification with this channel ID
         * can be received. If you don't send this channel ID in the request, or if the
         * channel ID provided has not yet been created by the app, FCM uses the channel
         * ID specified in the app manifest.
         */
        channelId?: string;
        /**
         * Sets the "ticker" text, which is sent to accessibility services. Prior to
         * API level 21 (Lollipop), sets the text that is displayed in the status bar
         * when the notification first arrives.
         */
        ticker?: string;
        /**
         * When set to `false` or unset, the notification is automatically dismissed when
         * the user clicks it in the panel. When set to `true`, the notification persists
         * even when the user clicks it.
         */
        sticky?: boolean;
        /**
         * For notifications that inform users about events with an absolute time reference, sets
         * the time that the event in the notification occurred. Notifications
         * in the panel are sorted by this time.
         */
        eventTimestamp?: Date;
        /**
         * Sets whether or not this notification is relevant only to the current device.
         * Some notifications can be bridged to other devices for remote display, such as
         * a Wear OS watch. This hint can be set to recommend this notification not be bridged.
         * See [Wear OS guides](https://developer.android.com/training/wearables/notifications/bridger#existing-method-of-preventing-bridging)
         */
        localOnly?: boolean;
        /**
         * Sets the relative priority for this notification. Low-priority notifications
         * may be hidden from the user in certain situations. Note this priority differs
         * from `AndroidMessagePriority`. This priority is processed by the client after
         * the message has been delivered. Whereas `AndroidMessagePriority` is an FCM concept
         * that controls when the message is delivered.
         */
        priority?: ('min' | 'low' | 'default' | 'high' | 'max');
        /**
         * Sets the vibration pattern to use. Pass in an array of milliseconds to
         * turn the vibrator on or off. The first value indicates the duration to wait before
         * turning the vibrator on. The next value indicates the duration to keep the
         * vibrator on. Subsequent values alternate between duration to turn the vibrator
         * off and to turn the vibrator on. If `vibrate_timings` is set and `default_vibrate_timings`
         * is set to `true`, the default value is used instead of the user-specified `vibrate_timings`.
         */
        vibrateTimingsMillis?: number[];
        /**
         * If set to `true`, use the Android framework's default vibrate pattern for the
         * notification. Default values are specified in [`config.xml`](https://android.googlesource.com/platform/frameworks/base/+/master/core/res/res/values/config.xml).
         * If `default_vibrate_timings` is set to `true` and `vibrate_timings` is also set,
         * the default value is used instead of the user-specified `vibrate_timings`.
         */
        defaultVibrateTimings?: boolean;
        /**
         * If set to `true`, use the Android framework's default sound for the notification.
         * Default values are specified in [`config.xml`](https://android.googlesource.com/platform/frameworks/base/+/master/core/res/res/values/config.xml).
         */
        defaultSound?: boolean;
        /**
         * Settings to control the notification's LED blinking rate and color if LED is
         * available on the device. The total blinking time is controlled by the OS.
         */
        lightSettings?: LightSettings;
        /**
         * If set to `true`, use the Android framework's default LED light settings
         * for the notification. Default values are specified in [`config.xml`](https://android.googlesource.com/platform/frameworks/base/+/master/core/res/res/values/config.xml).
         * If `default_light_settings` is set to `true` and `light_settings` is also set,
         * the user-specified `light_settings` is used instead of the default value.
         */
        defaultLightSettings?: boolean;
        /**
         * Sets the visibility of the notification. Must be either `private`, `public`,
         * or `secret`. If unspecified, defaults to `private`.
         */
        visibility?: ('private' | 'public' | 'secret');
        /**
         * Sets the number of items this notification represents. May be displayed as a
         * badge count for Launchers that support badging. See [`NotificationBadge`(https://developer.android.com/training/notify-user/badges).
         * For example, this might be useful if you're using just one notification to
         * represent multiple new messages but you want the count here to represent
         * the number of total new messages. If zero or unspecified, systems
         * that support badging use the default, which is to increment a number
         * displayed on the long-press menu each time a new notification arrives.
         */
        notificationCount?: number;
    }
    /**
      * Represents settings to control notification LED that can be included in
      * {@link messaging.AndroidNotification}.
      */
    export interface LightSettings {
        /**
         * Required. Sets color of the LED in `#rrggbb` or `#rrggbbaa` format.
         */
        color: string;
        /**
         * Required. Along with `light_off_duration`, defines the blink rate of LED flashes.
         */
        lightOnDurationMillis: number;
        /**
         * Required. Along with `light_on_duration`, defines the blink rate of LED flashes.
         */
        lightOffDurationMillis: number;
    }
    /**
      * Represents options for features provided by the FCM SDK for Android.
      */
    export interface AndroidFcmOptions {
        /**
         * The label associated with the message's analytics data.
         */
        analyticsLabel?: string;
    }
    /**
     * Interface representing an FCM legacy API data message payload. Data
     * messages let developers send up to 4KB of custom key-value pairs. The
     * keys and values must both be strings. Keys can be any custom string,
     * except for the following reserved strings:
     *
     *   * `"from"`
     *   * Anything starting with `"google."`.
     *
     * See [Build send requests](/docs/cloud-messaging/send-message)
     * for code samples and detailed documentation.
     */
    export interface DataMessagePayload {
        [key: string]: string;
    }
    /**
     * Interface representing an FCM legacy API notification message payload.
     * Notification messages let developers send up to 4KB of predefined
     * key-value pairs. Accepted keys are outlined below.
     *
     * See [Build send requests](/docs/cloud-messaging/send-message)
     * for code samples and detailed documentation.
     */
    export interface NotificationMessagePayload {
        /**
         * Identifier used to replace existing notifications in the notification drawer.
         *
         * If not specified, each request creates a new notification.
         *
         * If specified and a notification with the same tag is already being shown,
         * the new notification replaces the existing one in the notification drawer.
         *
         * **Platforms:** Android
         */
        tag?: string;
        /**
         * The notification's body text.
         *
         * **Platforms:** iOS, Android, Web
         */
        body?: string;
        /**
         * The notification's icon.
         *
         * **Android:** Sets the notification icon to `myicon` for drawable resource
         * `myicon`. If you don't send this key in the request, FCM displays the
         * launcher icon specified in your app manifest.
         *
         * **Web:** The URL to use for the notification's icon.
         *
         * **Platforms:** Android, Web
         */
        icon?: string;
        /**
         * The value of the badge on the home screen app icon.
         *
         * If not specified, the badge is not changed.
         *
         * If set to `0`, the badge is removed.
         *
         * **Platforms:** iOS
         */
        badge?: string;
        /**
         * The notification icon's color, expressed in `#rrggbb` format.
         *
         * **Platforms:** Android
         */
        color?: string;
        /**
         * The sound to be played when the device receives a notification. Supports
         * "default" for the default notification sound of the device or the filename of a
         * sound resource bundled in the app.
         * Sound files must reside in `/res/raw/`.
         *
         * **Platforms:** Android
         */
        sound?: string;
        /**
         * The notification's title.
         *
         * **Platforms:** iOS, Android, Web
         */
        title?: string;
        /**
         * The key to the body string in the app's string resources to use to localize
         * the body text to the user's current localization.
         *
         * **iOS:** Corresponds to `loc-key` in the APNs payload. See
         * [Payload Key Reference](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/PayloadKeyReference.html)
         * and
         * [Localizing the Content of Your Remote Notifications](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CreatingtheNotificationPayload.html#//apple_ref/doc/uid/TP40008194-CH10-SW9)
         * for more information.
         *
         * **Android:** See
         * [String Resources](http://developer.android.com/guide/topics/resources/string-resource.html)      * for more information.
         *
         * **Platforms:** iOS, Android
         */
        bodyLocKey?: string;
        /**
         * Variable string values to be used in place of the format specifiers in
         * `body_loc_key` to use to localize the body text to the user's current
         * localization.
         *
         * The value should be a stringified JSON array.
         *
         * **iOS:** Corresponds to `loc-args` in the APNs payload. See
         * [Payload Key Reference](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/PayloadKeyReference.html)
         * and
         * [Localizing the Content of Your Remote Notifications](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CreatingtheNotificationPayload.html#//apple_ref/doc/uid/TP40008194-CH10-SW9)
         * for more information.
         *
         * **Android:** See
         * [Formatting and Styling](http://developer.android.com/guide/topics/resources/string-resource.html#FormattingAndStyling)
         * for more information.
         *
         * **Platforms:** iOS, Android
         */
        bodyLocArgs?: string;
        /**
         * Action associated with a user click on the notification. If specified, an
         * activity with a matching Intent Filter is launched when a user clicks on the
         * notification.
         *
         *   * **Platforms:** Android
         */
        clickAction?: string;
        /**
         * The key to the title string in the app's string resources to use to localize
         * the title text to the user's current localization.
         *
         * **iOS:** Corresponds to `title-loc-key` in the APNs payload. See
         * [Payload Key Reference](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/PayloadKeyReference.html)
         * and
         * [Localizing the Content of Your Remote Notifications](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CreatingtheNotificationPayload.html#//apple_ref/doc/uid/TP40008194-CH10-SW9)
         * for more information.
         *
         * **Android:** See
         * [String Resources](http://developer.android.com/guide/topics/resources/string-resource.html)
         * for more information.
         *
         * **Platforms:** iOS, Android
         */
        titleLocKey?: string;
        /**
         * Variable string values to be used in place of the format specifiers in
         * `title_loc_key` to use to localize the title text to the user's current
         * localization.
         *
         * The value should be a stringified JSON array.
         *
         * **iOS:** Corresponds to `title-loc-args` in the APNs payload. See
         * [Payload Key Reference](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/PayloadKeyReference.html)
         * and
         * [Localizing the Content of Your Remote Notifications](https://developer.apple.com/library/content/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/CreatingtheNotificationPayload.html#//apple_ref/doc/uid/TP40008194-CH10-SW9)
         * for more information.
         *
         * **Android:** See
         * [Formatting and Styling](http://developer.android.com/guide/topics/resources/string-resource.html#FormattingAndStyling)
         * for more information.
         *
         * **Platforms:** iOS, Android
         */
        titleLocArgs?: string;
        [key: string]: string | undefined;
    }
    /**
     * Interface representing a Firebase Cloud Messaging message payload. One or
     * both of the `data` and `notification` keys are required.
     *
     * See
     * [Build send requests](/docs/cloud-messaging/send-message)
     * for code samples and detailed documentation.
     */
    export interface MessagingPayload {
        /**
         * The data message payload.
         */
        data?: DataMessagePayload;
        /**
         * The notification message payload.
         */
        notification?: NotificationMessagePayload;
    }
    /**
     * Interface representing the options that can be provided when sending a
     * message via the FCM legacy APIs.
     *
     * See [Build send requests](/docs/cloud-messaging/send-message)
     * for code samples and detailed documentation.
     */
    export interface MessagingOptions {
        /**
         * Whether or not the message should actually be sent. When set to `true`,
         * allows developers to test a request without actually sending a message. When
         * set to `false`, the message will be sent.
         *
         * **Default value:** `false`
         */
        dryRun?: boolean;
        /**
         * The priority of the message. Valid values are `"normal"` and `"high".` On
         * iOS, these correspond to APNs priorities `5` and `10`.
         *
         * By default, notification messages are sent with high priority, and data
         * messages are sent with normal priority. Normal priority optimizes the client
         * app's battery consumption and should be used unless immediate delivery is
         * required. For messages with normal priority, the app may receive the message
         * with unspecified delay.
         *
         * When a message is sent with high priority, it is sent immediately, and the
         * app can wake a sleeping device and open a network connection to your server.
         *
         * For more information, see
         * [Setting the priority of a message](/docs/cloud-messaging/concept-options#setting-the-priority-of-a-message).
         *
         * **Default value:** `"high"` for notification messages, `"normal"` for data
         * messages
         */
        priority?: string;
        /**
         * How long (in seconds) the message should be kept in FCM storage if the device
         * is offline. The maximum time to live supported is four weeks, and the default
         * value is also four weeks. For more information, see
         * [Setting the lifespan of a message](/docs/cloud-messaging/concept-options#ttl).
         *
         * **Default value:** `2419200` (representing four weeks, in seconds)
         */
        timeToLive?: number;
        /**
         * String identifying a group of messages (for example, "Updates Available")
         * that can be collapsed, so that only the last message gets sent when delivery
         * can be resumed. This is used to avoid sending too many of the same messages
         * when the device comes back online or becomes active.
         *
         * There is no guarantee of the order in which messages get sent.
         *
         * A maximum of four different collapse keys is allowed at any given time. This
         * means FCM server can simultaneously store four different
         * send-to-sync messages per client app. If you exceed this number, there is no
         * guarantee which four collapse keys the FCM server will keep.
         *
         * **Default value:** None
         */
        collapseKey?: string;
        /**
         * On iOS, use this field to represent `mutable-content` in the APNs payload.
         * When a notification is sent and this is set to `true`, the content of the
         * notification can be modified before it is displayed, using a
         * [Notification Service app extension](https://developer.apple.com/reference/usernotifications/unnotificationserviceextension)
         *
         * On Android and Web, this parameter will be ignored.
         *
         * **Default value:** `false`
         */
        mutableContent?: boolean;
        /**
         * On iOS, use this field to represent `content-available` in the APNs payload.
         * When a notification or data message is sent and this is set to `true`, an
         * inactive client app is awoken. On Android, data messages wake the app by
         * default. On Chrome, this flag is currently not supported.
         *
         * **Default value:** `false`
         */
        contentAvailable?: boolean;
        /**
         * The package name of the application which the registration tokens must match
         * in order to receive the message.
         *
         * **Default value:** None
         */
        restrictedPackageName?: string;
        [key: string]: any | undefined;
    }
    export interface MessagingDeviceResult {
        /**
         * The error that occurred when processing the message for the recipient.
         */
        error?: FirebaseError;
        /**
         * A unique ID for the successfully processed message.
         */
        messageId?: string;
        /**
         * The canonical registration token for the client app that the message was
         * processed and sent to. You should use this value as the registration token
         * for future requests. Otherwise, future messages might be rejected.
         */
        canonicalRegistrationToken?: string;
    }
    /**
     * Interface representing the status of a message sent to an individual device
     * via the FCM legacy APIs.
     *
     * See
     * [Send to individual devices](/docs/cloud-messaging/admin/send-messages#send_to_individual_devices)
     * for code samples and detailed documentation.
     */
    export interface MessagingDevicesResponse {
        canonicalRegistrationTokenCount: number;
        failureCount: number;
        multicastId: number;
        results: MessagingDeviceResult[];
        successCount: number;
    }
    /**
     * Interface representing the server response from the
     * {@link messaging.Messaging.sendToDeviceGroup `sendToDeviceGroup()`}
     * method.
     *
     * See
     * [Send messages to device groups](/docs/cloud-messaging/send-message?authuser=0#send_messages_to_device_groups)
     * for code samples and detailed documentation.
     */
    export interface MessagingDeviceGroupResponse {
        /**
         * The number of messages that could not be processed and resulted in an error.
         */
        successCount: number;
        /**
         * The number of messages that could not be processed and resulted in an error.
         */
        failureCount: number;
        /**
        * An array of registration tokens that failed to receive the message.
        */
        failedRegistrationTokens: string[];
    }
    /**
     * Interface representing the server response from the legacy
     * {@link messaging.Messaging.sendToTopic `sendToTopic()`} method.
     *
     * See
     * [Send to a topic](/docs/cloud-messaging/admin/send-messages#send_to_a_topic)
     * for code samples and detailed documentation.
     */
    export interface MessagingTopicResponse {
        /**
         * The message ID for a successfully received request which FCM will attempt to
         * deliver to all subscribed devices.
         */
        messageId: number;
    }
    /**
     * Interface representing the server response from the legacy
     * {@link messaging.Messaging.sendToCondition `sendToCondition()`} method.
     *
     * See
     * [Send to a condition](/docs/cloud-messaging/admin/send-messages#send_to_a_condition)
     * for code samples and detailed documentation.
     */
    export interface MessagingConditionResponse {
        /**
         * The message ID for a successfully received request which FCM will attempt to
         * deliver to all subscribed devices.
         */
        messageId: number;
    }
    /**
     * Interface representing the server response from the
     * {@link messaging.Messaging.subscribeToTopic `subscribeToTopic()`} and
     * {@link messaging.Messaging.unsubscribeFromTopic `unsubscribeFromTopic()`}
     * methods.
     *
     * See
     * [Manage topics from the server](/docs/cloud-messaging/manage-topics)
     * for code samples and detailed documentation.
     */
    export interface MessagingTopicManagementResponse {
        /**
         * The number of registration tokens that could not be subscribed to the topic
         * and resulted in an error.
         */
        failureCount: number;
        /**
         * The number of registration tokens that were successfully subscribed to the
         * topic.
         */
        successCount: number;
        /**
         * An array of errors corresponding to the provided registration token(s). The
         * length of this array will be equal to [`failureCount`](#failureCount).
         */
        errors: FirebaseArrayIndexError[];
    }
    /**
     * Interface representing the server response from the
     * {@link messaging.Messaging.sendAll `sendAll()`} and
     * {@link messaging.Messaging.sendMulticast `sendMulticast()`} methods.
     */
    export interface BatchResponse {
        /**
         * An array of responses, each corresponding to a message.
         */
        responses: SendResponse[];
        /**
         * The number of messages that were successfully handed off for sending.
         */
        successCount: number;
        /**
         * The number of messages that resulted in errors when sending.
         */
        failureCount: number;
    }
    /**
     * Interface representing the status of an individual message that was sent as
     * part of a batch request.
     */
    export interface SendResponse {
        /**
         * A boolean indicating if the message was successfully handed off to FCM or
         * not. When true, the `messageId` attribute is guaranteed to be set. When
         * false, the `error` attribute is guaranteed to be set.
         */
        success: boolean;
        /**
         * A unique message ID string, if the message was handed off to FCM for
         * delivery.
         *
         */
        messageId?: string;
        /**
         * An error, if the message was not handed off to FCM successfully.
         */
        error?: FirebaseError;
    }
    export interface Messaging {
        /**
         * The {@link app.App app} associated with the current `Messaging` service
         * instance.
         *
         * @example
         * ```javascript
         * var app = messaging.app;
         * ```
         */
        app: app.App;
        /**
         * Sends the given message via FCM.
         *
         * @param message The message payload.
         * @param dryRun Whether to send the message in the dry-run
         *   (validation only) mode.
         * @return A promise fulfilled with a unique message ID
         *   string after the message has been successfully handed off to the FCM
         *   service for delivery.
         */
        send(message: Message, dryRun?: boolean): Promise<string>;
        /**
         * Sends all the messages in the given array via Firebase Cloud Messaging.
         * Employs batching to send the entire list as a single RPC call. Compared
         * to the `send()` method, this method is a significantly more efficient way
         * to send multiple messages.
         *
         * The responses list obtained from the return value
         * corresponds to the order of tokens in the `MulticastMessage`. An error
         * from this method indicates a total failure -- i.e. none of the messages in
         * the list could be sent. Partial failures are indicated by a `BatchResponse`
         * return value.
         *
         * @param messages A non-empty array
         *   containing up to 500 messages.
         * @param dryRun Whether to send the messages in the dry-run
         *   (validation only) mode.
         * @return A Promise fulfilled with an object representing the result of the
         *   send operation.
         */
        sendAll(messages: Array<Message>, dryRun?: boolean): Promise<BatchResponse>;
        /**
         * Sends the given multicast message to all the FCM registration tokens
         * specified in it.
         *
         * This method uses the `sendAll()` API under the hood to send the given
         * message to all the target recipients. The responses list obtained from the
         * return value corresponds to the order of tokens in the `MulticastMessage`.
         * An error from this method indicates a total failure -- i.e. the message was
         * not sent to any of the tokens in the list. Partial failures are indicated by
         * a `BatchResponse` return value.
         *
         * @param message A multicast message
         *   containing up to 500 tokens.
         * @param dryRun Whether to send the message in the dry-run
         *   (validation only) mode.
         * @return A Promise fulfilled with an object representing the result of the
         *   send operation.
         */
        sendMulticast(message: MulticastMessage, dryRun?: boolean): Promise<BatchResponse>;
        /**
         * Sends an FCM message to a single device corresponding to the provided
         * registration token.
         *
         * See
         * [Send to individual devices](/docs/cloud-messaging/admin/legacy-fcm#send_to_individual_devices)
         * for code samples and detailed documentation. Takes either a
         * `registrationToken` to send to a single device or a
         * `registrationTokens` parameter containing an array of tokens to send
         * to multiple devices.
         *
         * @param registrationToken A device registration token or an array of
         *   device registration tokens to which the message should be sent.
         * @param payload The message payload.
         * @param options Optional options to
         *   alter the message.
         *
         * @return A promise fulfilled with the server's response after the message
         *   has been sent.
         */
        sendToDevice(registrationToken: string | string[], payload: MessagingPayload, options?: MessagingOptions): Promise<MessagingDevicesResponse>;
        /**
         * Sends an FCM message to a device group corresponding to the provided
         * notification key.
         *
         * See
         * [Send to a device group](/docs/cloud-messaging/admin/legacy-fcm#send_to_a_device_group)
         * for code samples and detailed documentation.
         *
         * @param notificationKey The notification key for the device group to
         *   which to send the message.
         * @param payload The message payload.
         * @param options Optional options to
         *   alter the message.
         *
         * @return A promise fulfilled with the server's response after the message
         *   has been sent.
         */
        sendToDeviceGroup(notificationKey: string, payload: MessagingPayload, options?: MessagingOptions): Promise<MessagingDeviceGroupResponse>;
        /**
         * Sends an FCM message to a topic.
         *
         * See
         * [Send to a topic](/docs/cloud-messaging/admin/legacy-fcm#send_to_a_topic)
         * for code samples and detailed documentation.
         *
         * @param topic The topic to which to send the message.
         * @param payload The message payload.
         * @param options Optional options to
         *   alter the message.
         *
         * @return A promise fulfilled with the server's response after the message
         *   has been sent.
         */
        sendToTopic(topic: string, payload: MessagingPayload, options?: MessagingOptions): Promise<MessagingTopicResponse>;
        /**
         * Sends an FCM message to a condition.
         *
         * See
         * [Send to a condition](/docs/cloud-messaging/admin/legacy-fcm#send_to_a_condition)
         * for code samples and detailed documentation.
         *
         * @param condition The condition determining to which topics to send
         *   the message.
         * @param payload The message payload.
         * @param options Optional options to
         *   alter the message.
         *
         * @return A promise fulfilled with the server's response after the message
         *   has been sent.
         */
        sendToCondition(condition: string, payload: MessagingPayload, options?: MessagingOptions): Promise<MessagingConditionResponse>;
        /**
         * Subscribes a device to an FCM topic.
         *
         * See [Subscribe to a
         * topic](/docs/cloud-messaging/manage-topics#suscribe_and_unsubscribe_using_the)
         * for code samples and detailed documentation. Optionally, you can provide an
         * array of tokens to subscribe multiple devices.
         *
         * @param registrationTokens A token or array of registration tokens
         *   for the devices to subscribe to the topic.
         * @param topic The topic to which to subscribe.
         *
         * @return A promise fulfilled with the server's response after the device has been
         *   subscribed to the topic.
         */
        subscribeToTopic(registrationTokens: string | string[], topic: string): Promise<MessagingTopicManagementResponse>;
        /**
         * Unsubscribes a device from an FCM topic.
         *
         * See [Unsubscribe from a
         * topic](/docs/cloud-messaging/admin/manage-topic-subscriptions#unsubscribe_from_a_topic)
         * for code samples and detailed documentation.  Optionally, you can provide an
         * array of tokens to unsubscribe multiple devices.
         *
         * @param registrationTokens A device registration token or an array of
         *   device registration tokens to unsubscribe from the topic.
         * @param topic The topic from which to unsubscribe.
         *
         * @return A promise fulfilled with the server's response after the device has been
         *   unsubscribed from the topic.
         */
        unsubscribeFromTopic(registrationTokens: string | string[], topic: string): Promise<MessagingTopicManagementResponse>;
    }
    export {};
}