/**
 * paygate/express — Express middleware for x402 paywalls (v3).
 *
 * Usage (v3):
 *   import express from 'express';
 *   import { paygate } from 'paygate/express';
 *
 *   const app = express();
 *
 *   // v3: one knob — merchantId. SDK fetches the rest from api.arispay.app.
 *   const pw = paygate({ merchantId: process.env.PAYGATE_MERCHANT_ID });
 *
 *   app.get('/api/data', pw({ priceCents: 10 }), (req, res) => {
 *     res.json({ data: 'premium content' });
 *   });
 *
 *   // Dynamic pricing
 *   app.post('/api/analyse', pw({
 *     priceCents: (req) => req.body.deep ? 50 : 10,
 *     description: 'AI analysis',
 *   }), handler);
 *
 * v2 config (`wallet` + `network`) still works via the compat shim.
 */
import type { RequestHandler } from "express";
import { type PaygateConfig, type RoutePrice } from "./core.js";
export type { PaygateConfig, RoutePrice };
/**
 * Serve the capability manifest on the merchant's own origin (spec §9):
 *   app.get('/.well-known/arispay.json', arispayManifest(config));
 * Re-serves the hosted manifest (merchantId mode) or synthesizes the
 * account-free one (v2-shim mode).
 */
export declare function arispayManifest(config: PaygateConfig): RequestHandler;
/**
 * Create a paywall middleware factory.
 */
export declare function paygate(config: PaygateConfig): (routePrice: RoutePrice) => RequestHandler;
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