export type CallbackMessage = {
    state: string;
} & ({
    type: "fail";
    error: {
        code: number;
        message: string;
    };
} | {
    type: "success";
    data: string | object;
});
export declare class CommunicateHelper {
    private readonly pendingEvents;
    private readonly windowMonitorIntervals;
    private readonly origin;
    private readonly eventHandler;
    constructor(origin: string);
    private createEventHandler;
    private isValidCallbackMessage;
    private initializeEventListeners;
    handleResponse(message: CallbackMessage): void;
    private parseSuccessResponse;
    private monitorWindowClosing;
    private hasPendingRequest;
    sendRequest<T>(action: (requestId: string) => Promise<Window>): Promise<T>;
    cleanup(): void;
}