export declare class RequestBodyTooLargeError extends Error {
    status: number;
    constructor(max_bytes: number);
}
type Params = {
    req: Request;
    max_bytes: number;
};
/**
 * Reads the whole request body, aborting as soon as it grows past
 * `max_bytes` so oversized (or chunked, length-less) bodies are never fully
 * buffered. Returns `undefined` when the request has no body.
 */
export default function readRequestBody({ req, max_bytes, }: Params): Promise<Uint8Array<ArrayBuffer> | undefined>;
export {};