import { SandboxInitializationParams } from '../../common/types';
/**
 * The IFrameContainer class creates and manages a sandboxed iframe within the web page context.
 * It serves as a secure container for running dapplets and overcomes restrictions like
 * Content Security Policy (CSP) that prevent direct usage of certain features like WebWorkers.
 * It sends commands to the iframe to create and terminate dapplet workers and to send messages
 * to them.
 */
export declare class IFrameContainer {
    private _messageListenersByWorkerId;
    private _iframe;
    constructor();
    addWorkerListener(workerId: string, listener: (message: any) => void): void;
    removeWorkerListener(workerId: string, listener: (message: any) => void): void;
    postMessageToWorker(workerId: string, workerMessage: any): void;
    createWorker(dappletScript: string, injectorInitParams: SandboxInitializationParams): string;
    terminateWorker(workerId: string): void;
    destroy(): void;
    private _sandboxIframeListener;
}