/**
 * paygate/fastify — Fastify plugin for x402 paywalls (v3).
 *
 * Usage (v3):
 *   import Fastify from 'fastify';
 *   import paygate from 'paygate/fastify';
 *
 *   const app = Fastify();
 *   await app.register(paygate, { merchantId: process.env.PAYGATE_MERCHANT_ID });
 *
 *   // Route-config-driven paywall
 *   app.get('/api/data',
 *     { config: { paygate: { priceCents: 10 } } },
 *     async (req, reply) => reply.send({ data: 'premium' })
 *   );
 *
 *   // Or imperative
 *   app.get('/api/premium', async (req, reply) => {
 *     const { paid } = await req.paygatePay({ priceCents: 25 });
 *     if (!paid) return;
 *     reply.send({ data: '...' });
 *   });
 */
import type { FastifyPluginAsync } from "fastify";
import { type PaygateConfig, type RoutePrice } from "./core.js";
export type { PaygateConfig, RoutePrice };
declare module "fastify" {
    interface FastifyRequest {
        paygate?: {
            paid: boolean;
            txHash?: string;
            trustTier?: string;
            merchant?: string;
            /** True when this delivery rides an earlier request's settlement (re-delivery). */
            replayed?: boolean;
        };
        paygatePay: (routePrice: RoutePrice) => Promise<{
            paid: boolean;
        }>;
    }
    interface FastifyContextConfig {
        paygate?: RoutePrice;
        /** @deprecated — v2 key. Use `paygate` instead. */
        x402?: RoutePrice;
    }
}
declare const paygatePlugin: FastifyPluginAsync<PaygateConfig>;
export default paygatePlugin;
export { paygatePlugin };
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