Self-facilitation

import { serve } from "@hono/node-server";
import { Hono } from "hono";
import { paymentMiddleware } from "@x402/hono";
import { x402ResourceServer } from "@x402/core/server";
import { ExactStellarScheme } from "@x402/stellar/exact/server";
import { bazaarResourceServerExtension } from "@x402/extensions/bazaar";
import { buildFacilitator, loadConfig } from "@rail402.dev/facilitator";
import { describeEndpoint } from "@rail402.dev/sdk";

const USDC = "CBIELTK6YBZJU5UP2WWQEUCYKLPU6AUNZ2BQ4WWFEIE3USCIHMXQDAMA"; // testnet USDC SAC

const { facilitator } = buildFacilitator(loadConfig(process.env));

const x402 = new x402ResourceServer([facilitator]); // in-process, no HTTPFacilitatorClient
x402.register("stellar:*", new ExactStellarScheme());
x402.registerExtension(bazaarResourceServerExtension);

const app = new Hono();
app.use("*", paymentMiddleware({
  "GET /quote": {
    accepts: {
      scheme: "exact",
      network: "stellar:testnet",
      price: { amount: "500000", asset: USDC },
      payTo: process.env.SELLER_ADDRESS,
      maxTimeoutSeconds: 60,
    },
    description: "A price quote for a named commodity.",
    mimeType: "application/json",
    extensions: describeEndpoint({
      params: { symbol: { description: "Ticker such as XLM or BTC.", example: "XLM" } },
    }),
  },
}, x402));

app.get("/quote", (c) => c.json({ symbol: c.req.query("symbol") ?? "XLM", price: 0.1234 }));

serve({ fetch: app.fetch, port: 4023 });