import { HttpHandler, HttpRequest, HttpResponse } from "@http4t/core/contract";
/**
 * Wraps an HttpRequest to send to listeners
 */
export type FetchMessage = {
    msg: "fetch";
    request: HttpRequest;
};
export declare function fetchMessage(request: HttpRequest): FetchMessage;
export declare function isFetchMessage(value: any): value is FetchMessage;
export declare function handleFetchMessages(http: HttpHandler, onError: (request: HttpRequest, err: any) => Promise<HttpResponse & {
    err: any;
}>): void;
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