/**
 * Create (or return existing) full-viewport waiting UI on the host page while
 * Apple Pay Code runs in a separate window. Cancel invokes `onCancel`.
 */
export declare function showApplePayWaitingOverlay({ onCancel, }: {
    onCancel: () => void;
}): HTMLElement;
/**
 * Sheet already authorized; hide Cancel so the donor cannot double-pay.
 * No-op if the overlay is not on the page.
 */
export declare function setApplePayWaitingOverlayCompleting(): void;
/** Remove the host-page Apple Pay waiting overlay if present. */
export declare function hideApplePayWaitingOverlay(): void;