/**
 * @name NativeHttpX402Adapter
 * @description Native Node.js HTTP adapter and request utilities for x402-gated MCP traffic.
 */
import * as http from 'http';
import type { HTTPAdapter } from '@x402/core/server';
/**
 * @name getHttpHeader
 * @description Return the first value for an HTTP header using case-insensitive lookup.
 *
 * Node normalizes incoming headers to lowercase, but MCP clients, test
 * harnesses, and replayed requests may preserve original casing. x402 prepaid
 * and payment headers must work across all of them.
 */
export declare function getHttpHeader(headers: http.IncomingHttpHeaders, name: string): string | undefined;
/**
 * @name NativeHttpAdapterOptions
 * @description Adapter inputs required by x402's framework-agnostic HTTP server.
 */
export interface NativeHttpAdapterOptions {
    request: http.IncomingMessage;
    path: string;
    body: unknown;
}
/**
 * @name NativeHttpAdapter
 * @description Implements x402's HTTPAdapter over Node's native IncomingMessage.
 */
export declare class NativeHttpAdapter implements HTTPAdapter {
    private readonly request;
    private readonly path;
    private readonly body;
    constructor(options: NativeHttpAdapterOptions);
    /**
     * @name getHeader
     * @description Returns a case-insensitive HTTP header value.
     */
    getHeader(name: string): string | undefined;
    /**
     * @name getMethod
     * @description Returns the HTTP method.
     */
    getMethod(): string;
    /**
     * @name getPath
     * @description Returns the x402 virtual path used for payment route matching.
     */
    getPath(): string;
    /**
     * @name getUrl
     * @description Returns an absolute URL for the x402 protected virtual resource.
     */
    getUrl(): string;
    /**
     * @name getAcceptHeader
     * @description Returns the request Accept header.
     */
    getAcceptHeader(): string;
    /**
     * @name getUserAgent
     * @description Returns the request User-Agent header.
     */
    getUserAgent(): string;
    /**
     * @name getBody
     * @description Returns the parsed JSON-RPC body for dynamic x402 pricing.
     */
    getBody(): unknown;
}
/**
 * @name readRequestBody
 * @description Reads and bounds a Node HTTP request body before replaying it to MCP.
 */
export declare function readRequestBody(request: http.IncomingMessage, maxBytes?: number): Promise<Buffer>;
/**
 * @name replayRequest
 * @description Recreates a readable request stream after the monetization gate has consumed the original body.
 */
export declare function replayRequest(original: http.IncomingMessage, body: Buffer): http.IncomingMessage;
/**
 * @name parseJsonBody
 * @description Parses a JSON request body and returns undefined for empty bodies.
 */
export declare function parseJsonBody(body: Buffer): unknown;
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