import type { Next, Req, Res } from "../types";
export type Middleware = (req: Req, res: Res, next: Next) => void | Promise<void>;
export type ErrorMiddleware = (err: unknown, req: Req, res: Res, next: Next) => void | Promise<void>;
type Layer = {
    path?: string;
    fn: Middleware;
    isErrorHandler: false;
} | {
    path?: string;
    fn: ErrorMiddleware;
    isErrorHandler: true;
};
export declare function compose(layers: Layer[]): (req: Req, res: Res, out?: Next) => void;
export {};
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