import { GetApplicationConfigurationResponse, IEvaServiceDefinition } from "@springtree/eva-services-core";
import { EvaContext, IEvaServiceCallOptions } from "@springtree/eva-sdk-core-service";
import { BaseHub, IHubConnectionOptions, THubConnectionEventHandler } from "./base-hub.js";
import { IExecuteRequest, IJoinAPIHub } from "../request/api-hub.js";
import { IExecuteResponse } from "../response/api-hub.js";
export interface IExecuteError<SVC extends IEvaServiceDefinition> {
    request: IExecuteRequest<SVC>;
    response: IExecuteResponse<SVC>;
}
/**
 * The API signalr hub implementation.
 * The API hub can be used to perform request on the EVA backend via websocket instead
 * of the usual HTTP transport.
 * This hub exposes no events and has a request/response method called execute that performs
 * a call to EVA.
 *
 * @export
 * @class APIHub
 * @extends {BaseHub<IJoinAPIHub>}
 */
export declare class APIHub extends BaseHub<IJoinAPIHub> {
    setEventHandler(eventName: "connection", handler: THubConnectionEventHandler): void;
    /**
     * Creates a APIHub hub instance
     */
    constructor({ configuration, context, options, }: {
        configuration: GetApplicationConfigurationResponse;
        context: EvaContext;
        options?: IHubConnectionOptions;
    });
    /**
     * Performs an EVA api call using the websocket transport
     */
    execute<SVC extends IEvaServiceDefinition>({ options, payload, service, }: {
        options?: Omit<IEvaServiceCallOptions, "abortSignal" | "timeout">;
        payload?: SVC["request"];
        service: new () => SVC;
    }): Promise<IExecuteResponse<SVC> | undefined>;
    /**
     * Helper method to prepare headers in the same fashion as the EvaService class does
     */
    private prepareHeaders;
}
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