@firebase/messaging-types

analyticsLabel?: string;

link?: string;

deleteToken: { (): Promise<boolean>; (token: string): Promise<boolean> };

getToken: (options?: {
    vapidKey?: string;
    serviceWorkerRegistration?: ServiceWorkerRegistration;
}) => Promise<string>;

onBackgroundMessage: (
    nextOrObserver: NextFn<MessagePayload> | Observer<MessagePayload>,
    error?: ErrorFn,
    completed?: CompleteFn
) => Unsubscribe;

onMessage: (
    nextOrObserver: NextFn<any> | Observer<any>,
    error?: ErrorFn,
    completed?: CompleteFn
) => Unsubscribe;

onTokenRefresh: (
    nextOrObserver: NextFn<any> | Observer<any>,
    error?: ErrorFn,
    completed?: CompleteFn
) => Unsubscribe;

requestPermission: () => Promise<void>;

setBackgroundMessageHandler: (
    callback: (payload: any) => Promise<any> | void
) => void;

usePublicVapidKey: (b64PublicKey: string) => void;

useServiceWorker: (registration: ServiceWorkerRegistration) => void;

collapseKey: string;

data?: { [key: string]: string };

fcmOptions?: FcmOptions;

from: string;

messageId: string;

notification?: NotificationPayload;

body?: string;

image?: string;

title?: string;