/// <reference types="@cloudflare/workers-types" />
import { Middleware } from "./middlewareTypes";
export declare type CloudflareEventFunctions = Pick<FetchEvent, "waitUntil"> & Partial<Pick<FetchEvent, "passThroughOnException">>;
/**
 * The main Sunder app class, this is the root of your Sunder-powered application.
 */
export declare class Sunder<EnvironmentType = Record<string, any>> {
    state?: DurableObjectState;
    silent: boolean;
    private middleware;
    constructor(opts?: {
        state?: DurableObjectState;
    });
    /**
     * Handles given FetchEvent and returns a promise of the response. Note that this function catches errors and delegates them to the `this.onerror` function.
     *
     * An optional second argument with the environment can be supplied.
     */
    handle(event: CloudflareEventFunctions & {
        request: Request;
    }, env?: EnvironmentType): Promise<Response>;
    fetch(request: Request, env: EnvironmentType, ctx: FetchEvent | CloudflareEventFunctions): Promise<Response>;
    /**
     * Registers a middleware function, note that the order matters!
     * @param fn
     */
    use<P = object>(fn: Middleware<EnvironmentType, P>): this;
    onerror(err: Error): void;
}