import { JsonObject } from '../types';
export declare const MessageCodes: {
    readonly AppParams: "app_params";
    readonly PaymentLinkSuccess: "payment_link_success";
    readonly PaymentLinkClosed: "payment_link_closed";
    readonly GuestCheckoutRedirectSuccess: "guest_checkout_redirect_success";
    readonly Success: "success";
    readonly Event: "event";
};
export type MessageCodesType = (typeof MessageCodes)[keyof typeof MessageCodes];
type MessageData = JsonObject;
/**
 * Subscribes to a message from the parent window.
 * @param messageCode A message code to subscribe to.
 * @param onMessage Callback for when the message is received.
 * @param allowedOrigin The origin to allow messages from.
 * @param onValidateOrigin Callback to validate the origin of the message.
 * @returns
 */
export declare function subscribeToWindowMessage({ onMessage, allowedOrigin, onValidateOrigin, }: {
    onMessage: (data?: MessageData) => void;
    allowedOrigin: string;
    onValidateOrigin?: (origin: string) => Promise<boolean>;
}): () => void;
export {};
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