import { AnyAction } from './actions/types';
/**
 * @internal
 */
export declare type HandlerData = {
    data: AnyAction;
};
/**
 * @internal
 */
export declare type Handler = (event: HandlerData) => void;
/**
 * @internal
 */
export interface MessageTransport {
    dispatch(message: any): void;
    hostFrame: Window;
    localOrigin: string;
    subscribe(handler: Handler): () => void;
}
/**
 * Create a MessageTransport from an IFrame.
 * @remarks
 * Used on the host-side to create a postMessage MessageTransport.
 * @beta
 */
export declare function fromFrame(frame: HTMLIFrameElement, localOrigin: string): MessageTransport;
/**
 * Create a MessageTransport from a parent window.
 * @remarks
 * Used on the client-side to create a postMessage MessageTransport.
 * @beta
 */
export declare function fromWindow(contentWindow: Window, localOrigin: string): MessageTransport;