import { AppConfigSetterOptions, AppConfigGetterOptions } from '../common/types';
/**
 * In this file we set up the listener for the application,
 * then send out the request for the data to the iframe.
 *
 * The iframe will receive the request and check for a pre-existing
 * value.  If that value does not exist, the iframe will
 * execute the user-defined data-getter, caching the response in
 * localStorage.
 *
 * Finally, the iframe will relay to recovered value back to the
 * application.
 */
export declare const get: <Data>(config: AppConfigGetterOptions<Data>) => Promise<Data | null>;
export declare const set: <Data>(config: AppConfigSetterOptions<Data>) => Promise<Data | null>;