import type { APSBody, Notification, NotificationBody, NotificationHeaders } from "./notification.js";
/**
 * Empty interface on purpose to allow for TS
 * autocompletion to be extended by the user.
 * Must be exported to allow extending in the user's code.
 */
export interface NotificationCustomAppData {
}
type NotificationData = NotificationHeaders & NotificationBody<never, NotificationCustomAppData>;
type NotificationObject = Notification<APSBody<Record<string, string>>>;
/**
 * Create a notification about an incoming VoIP call through PushKit.
 *
 * `expiration` field is clamped to be lower than 5 seconds as per Apple requirement:
 *
 * ```text
 * Set the value of the apns-expiration header field to 0, or to only a few seconds.
 * Doing so prevents the system from delivering the notification at a much later time.
 * ```
 *
 * @see https://developer.apple.com/documentation/PushKit/responding-to-voip-notifications-from-pushkit#Generate-Push-Notifications-from-Your-Server
 *
 * @param appBundleId The topic of the notification. It will be suffixed, if needed, with `.voip`.
 * @param data
 * @returns
 */
export declare function VoipNotification(appBundleId: string, data: NotificationData): NotificationObject;
export {};