import { MessageData, MessageListener } from "../types";
/**
 * Message listener
 *
 * @param {MessageEvent} evt
 */
declare function onMessageListener(evt: MessageEvent): void;
/**
 * Set the listener received from the partner.
 *  Also send all the messages received prior to this point.
 * @param {MessageListener} callback
 */
declare function setOnMessage(callback: MessageListener): boolean;
declare function restoreOnMessage(): void;
declare function getStoredData(): MessageData[];
declare function clearStoredData(): void;
export { onMessageListener, setOnMessage, restoreOnMessage, getStoredData, clearStoredData };