import { ExternalTaskWorker } from '../ExternalTaskWorker';
import { IdentityAccessor } from '../IdentityAccessor';
import { HandleExternalTaskAction, IExternalTaskWorkerConfig } from '../Types/index';
export declare class ExternalTaskClient {
    private engineUrl;
    private identityAccessor;
    constructor(engineUrl: string, identity?: IdentityAccessor);
    /**
     * Gets the url of the engine that this client is communicating with.
     */
    getEngineUrl(): string;
    dispose(): void;
    subscribeToExternalTaskTopic<TExternalTaskPayload, TResultPayload extends object>(topic: string, processingFunction: HandleExternalTaskAction<TExternalTaskPayload, TResultPayload>, config?: IExternalTaskWorkerConfig): Promise<ExternalTaskWorker<TExternalTaskPayload, TResultPayload>>;
}