import { IHttpClient } from "@paybyrd/http-client";
import { ILogger } from "@paybyrd/logger-js";
import { IPreAuthRequest, IChallengeService, IDirectoryServerService, IPostAuthResponse, IThreeDSecureOptions, IThreeDSecureService } from "./abstractions";
import { IObservable, IObserver } from "../observer/abstractions";
export declare class ThreeDSecureService implements IThreeDSecureService, IObservable {
    private readonly _options;
    private readonly _logger;
    private readonly _client;
    private readonly _directoryServer;
    private readonly _challenge;
    private readonly _observers;
    constructor(options: IThreeDSecureOptions, logger?: ILogger, httpClient?: IHttpClient, directoryServer?: IDirectoryServerService, challenge?: IChallengeService);
    subscribe(observer: IObserver): void;
    unsubscribe(observer: IObserver): void;
    execute(request: IPreAuthRequest, correlationId?: string): Promise<IPostAuthResponse>;
    private preAuth;
    private auth;
    private postAuth;
    private reset;
    private notifyAll;
    private static getLoggerOptions;
    private static getHttpClientOptions;
}