/** The Web Push notification subscription state. */
export declare enum PermissionState {
    /** The player has granted permission. */
    Granted = "granted",
    /** The player has explicitly denied permissions, preventing any future permission requests. */
    Denied = "denied",
    /** The player hasn't granted permission yet, but we can prompt them to enable it. */
    Prompt = "prompt",
    /** The player's browser doesn't support Web Push notifications, or the PWA is misconfigured. */
    Unsupported = "unsupported"
}
/** Options to pass to {@link schedule}. */
export declare type ScheduleOptions = {
    /** How many milliseconds from now to send this notification. */
    delay?: number;
    /** Text displayed in the title of the notification bubble. */
    title?: string;
    /**
     * The SMS message text. You should prefix this with the name of your game, so players know who
     * the random phone number texting them is. Eg: "Beadle: New puzzle available!"
     */
    smsText?: string;
    /** The link to open when the player engages with the notification. */
    link?: string;
    /** Text displayed in the body (subtitle) of the notification bubble. */
    body?: string;
    /** Icon image displayed in the notification bubble. */
    icon?: string;
    /** Android-only badge image displayed in the notification bubble. */
    badge?: string;
    /** Banner image displayed in the notification bubble. */
    image?: string;
};
export declare function getPermissionState(): Promise<PermissionState>;
export declare function requestPermission(): Promise<boolean>;
/**
 * Schedules a push notification.
 *
 * Only one notification with a given tag can be scheduled at a time. If another notification was
 * previously scheduled with the given tag, the entire notification is replaced with the new one.
 *
 * @param opts Options for configuring display and delivery of the notification.
 */
export declare function schedule(tag: string, opts?: ScheduleOptions): void;