XRPL_FACILITATOR_URL=http://127.0.0.1:8011
XRPL_PAY_TO=rha... # your wallet address to receive funds
XRPL_PRICE_DROPS=1000 # price in drops (1 XRP = 1,000,000 drops)
XRPL_NETWORK=xrpl:1
PORT=8080

import dotenv from "dotenv";
import express from "express";

import { requirePayment } from "x402-xrpl/express";

dotenv.config({ override: false });

const payToAddress = process.env.XRPL_PAY_TO;
if (!payToAddress) {
  throw new Error("XRPL_PAY_TO is required");
}

const facilitatorUrl = process.env.XRPL_FACILITATOR_URL ?? "http://127.0.0.1:8011";
const network = process.env.XRPL_NETWORK ?? "xrpl:1";
const priceDrops = process.env.XRPL_PRICE_DROPS ?? "1000";
const port = Number(process.env.PORT ?? "8080");

const app = express();

// Protect /hello with XRPL x402 middleware (facilitator does verify+settle by default).
app.use(
  requirePayment({
    path: "/hello",
    price: priceDrops,
    payToAddress,
    network,
    facilitatorUrl,
    asset: "XRP",
    resource: "demo:hello-world",
    description: "Hello World Demo (paid)",
  }),
);

app.get("/hello", (_req, res) => {
  res.json({ message: "Hello World! Thanks for the payment." });
});

// Free endpoint
app.get("/health", (_req, res) => {
  res.json({ status: "ok" });
});

app.listen(port, () => {
  // eslint-disable-next-line no-console
  console.log(`listening on http://127.0.0.1:${port}`);
});