/**
 * @param topic
 * @param payload
 * @param origin
 * @param target
 */
export declare function postMessage(topic: string, payload?: any, origin?: string, target?: Window): void;
/**
 * @param topic
 * @param callback
 * @returns {(event:{data: {topic: any, payload: any}})=>undefined}
 */
export declare function addCrossDomainEventListener(topic: string, callback: Function): Function;
/**
 * @param listener
 */
export declare function removeCrossDomainEventListener(listener: Function): void;
export declare class Channel {
    private origin;
    private target;
    protected debug: boolean;
    protected debugListenres: Function[];
    /**
     * @param origin
     * @param target
     * @param debug
     */
    constructor(origin: string, target?: Window, debug?: boolean);
    /**
     * @param topic
     * @param callback
     * @returns {Function}
     */
    subscribe(topic: string, callback: Function): Function;
    /**
     * @param listener
     */
    unsuscribe(listener: Function): void;
    /**
     * @param topic
     * @param payload
     */
    send(topic: string, payload?: any): void;
}