/**
 * Copyright (c) 2026 AzerothJS.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
/**
 * A Response that keeps its payload in the shape the adapter will write, so the common path
 * never round-trips through a stream. It satisfies the full Response interface, so a handler
 * or middleware holding one cannot tell the difference.
 */
export declare class PayloadResponse implements Response {
    #private;
    constructor(payload: Uint8Array<ArrayBuffer> | string, status: number, headerRecord: Record<string, string>, setCookies?: readonly string[]);
    /**
     * The adapter's fast path: everything a socket write needs, no undici. A string payload
     * is returned AS a string - `res.end(string)` encodes natively during the write, which
     * beats encoding in JS first. @internal
     */
    raw(): {
        status: number;
        headers: Record<string, string | string[]>;
        payload: Uint8Array<ArrayBuffer> | string;
    };
    /**
     * A new PayloadResponse over the SAME payload with extra headers merged into the record
     * (later names lowercased; existing names win unless overwritten). Edge middleware use
     * this to add response headers WITHOUT dropping the adapter fast path - mutating the
     * `headers` view alone would not reach the record the adapter actually writes. @internal
     */
    withHeaders(extra: Record<string, string>): PayloadResponse;
    get status(): number;
    get ok(): boolean;
    get statusText(): string;
    get headers(): Headers;
    get body(): ReadableStream<Uint8Array<ArrayBuffer>> | null;
    get bodyUsed(): boolean;
    arrayBuffer(): Promise<ArrayBuffer>;
    bytes(): Promise<Uint8Array<ArrayBuffer>>;
    text(): Promise<string>;
    json(): Promise<unknown>;
    blob(): Promise<Blob>;
    formData(): Promise<FormData>;
    clone(): Response;
    get redirected(): boolean;
    get type(): ResponseType;
    get url(): string;
}