/**
 * Browser-side Web Push setup.
 *
 * Delivery and VAPID signing belong to the backend frameworks. This helper
 * only handles permission, service-worker registration, and subscription
 * serialisation so the resulting object can be sent to a Tina4 API.
 */
export interface PushClientOptions {
    /** Base64url VAPID public key issued by the backend. */
    applicationServerKey: string | Uint8Array;
    /** Use a known registration, otherwise wait for navigator.serviceWorker.ready. */
    serviceWorker?: ServiceWorkerRegistration;
    userVisibleOnly?: boolean;
}
export interface PushSubscriptionData {
    endpoint: string;
    keys: {
        p256dh: string;
        auth: string;
    };
}
declare function decodeBase64Url(value: string): Uint8Array;
declare function encodeBase64Url(value: ArrayBuffer | ArrayBufferView): string;
export declare const push: {
    supported(): boolean;
    permission(): Promise<NotificationPermission>;
    requestPermission(): Promise<NotificationPermission>;
    subscribe(options: PushClientOptions): Promise<PushSubscriptionData>;
    current(options?: Pick<PushClientOptions, "serviceWorker">): Promise<PushSubscriptionData | null>;
    unsubscribe(options?: Pick<PushClientOptions, "serviceWorker">): Promise<boolean>;
    serialize(subscription: globalThis.PushSubscription): PushSubscriptionData;
    /** Exposed for tests and non-browser adapters that need the Web Push key bytes. */
    decodeApplicationServerKey: typeof decodeBase64Url;
    encodeKey: typeof encodeBase64Url;
};
export {};
//# sourceMappingURL=push.d.ts.map