import { HttpHandler, HttpRequest, HttpResponse } from "@http4t/core/contract";
import { ErrorResponder } from "./util/ErrorResponder";
import { TabFinder } from "./util/tabs";
export declare class SendToTabHandler implements HttpHandler {
    private readonly findTab;
    constructor(findTab?: TabFinder);
    handle(request: HttpRequest): Promise<HttpResponse>;
}
/**
 * Routes requests from {@link FetchViaBackgroundScript} to the appropriate tabs
 *
 * Depends on the tabs running a content script which has called {@link startContentScriptListener}
 */
export declare function startBackgroundListener(http?: HttpHandler, onError?: ErrorResponder): void;
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