import { Transport, MessageHandler } from "../types";
import Logger from "../logger";
export default class WindowMessageTransport implements Transport {
    private target;
    private logger;
    private _onMessage?;
    constructor(target?: Window, logger?: Logger);
    connect: () => void;
    disconnect: () => void;
    _onMessageEvent: (event: MessageEvent) => void;
    set onMessage(handler: MessageHandler | undefined);
    get onMessage(): MessageHandler | undefined;
    send: (response: unknown) => Promise<void>;
}