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Installation

npm install @faremeter/middleware @faremeter/info

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Basic setup

import express from "express";
import { express as middleware } from "@faremeter/middleware";
import { solana } from "@faremeter/info";

const app = express();

// Create the middleware
const paywalledMiddleware = await middleware.createMiddleware({
  facilitatorURL: "https://facilitator.corbits.dev",
  accepts: [
    solana.x402Exact({
      network: "devnet",
      asset: "USDC",
      amount: "10000", // $0.01 in USDC base units
      payTo: "YOUR_WALLET_ADDRESS",
    }),
  ],
});

// Free endpoint
app.get("/api/free", (req, res) => {
  res.json({ data: "free content" });
});

// Premium endpoint with payment required
app.get("/api/premium", paywalledMiddleware, (req, res) => {
  res.json({ data: "premium content" });
});

app.listen(3000);