/**
 * @license
 * Copyright 2026 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 { IdChangeUnsubscribeFn, Installations } from '@firebase/installations';
import { MessagingService } from '../messaging-service';
/**
 * Re-runs FCM FID registration when push subscription keys change (e.g. `pushsubscriptionchange`
 * in the service worker). No-op if the app instance was never registered via `register()`.
 * Best-effort: callers should catch failures when permission or push may be unavailable.
 */
export declare function refreshFidRegistrationIfStored(messaging: MessagingService): Promise<string | undefined>;
/**
 * When the Firebase Installation ID changes, re-run `register()` so FCM registration and
 * onRegistered run for the new FID. No-op if no onRegistered handler is set or the app
 * instance was never registered with FCM.
 */
export declare function subscribeFidChangeRegistration(messaging: MessagingService, installations: Installations): IdChangeUnsubscribeFn;
