import type { Service } from "./index.js";
export type ServiceFnClosure<Request, Response> = (req: Request) => Promise<Response> | Response;
/**
 * Returns a new {@link ServiceFn} with a given closure..
 *
 * @example
 * ```ts
 * import { serviceFn } from "@taxum/core/service";
 *
 * const service = serviceFn(
 *     (req) => HttpResponse.builder().body("Hello World")
 * );
 * ```
 */
export declare const serviceFn: <Request, Response>(f: ServiceFnClosure<Request, Response>) => Service<Request, Response>;
/**
 * A {@link Service} implemented by a closure.
 *
 * @see {@link serviceFn}
 */
export declare class ServiceFn<Request, Response> implements Service<Request, Response> {
    private readonly f;
    constructor(f: ServiceFnClosure<Request, Response>);
    invoke(req: Request): Promise<Response>;
}