/// <reference types="chrome" />
import { HttpHandler, HttpRequest, HttpResponse } from "@http4t/core/contract";
import { ErrorResponder } from "./util/ErrorResponder";
/**
 * Routes a request to another tab which is also running this extension.
 *
 * Depends on a running background script which has called {@link startBackgroundListener}
 */
export declare class FetchViaBackgroundScript implements HttpHandler {
    private readonly extensionId;
    private readonly options;
    private readonly onError;
    constructor(extensionId?: (request: HttpRequest) => any, options?: (request: HttpRequest) => chrome.runtime.MessageOptions, onError?: ErrorResponder);
    handle(request: HttpRequest): Promise<HttpResponse>;
}
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