RelAI

import express from 'express';
import cors from 'cors';
import dotenv from 'dotenv';
import Relai from '@relai-fi/x402/server';

dotenv.config();

const app = express();
const PORT = process.env.PORT || 3000;

// Middleware
app.use(cors());
app.use(express.json());

// Initialize RelAI SDK for SKALE Base Sepolia
const relai = new Relai({
  network: 'skale-base-sepolia',
  facilitatorUrl: 'https://facilitator.x402.fi'
});

// Public endpoint - no payment required
app.get('/api/public', (req, res) => {
  res.json({
    message: 'This is a public endpoint - no payment required',
    network: 'SKALE Base Sepolia'
  });
});

// Premium endpoint - protected by x402 payment
app.get(
  '/api/premium',
  relai.protect({
    payTo: process.env.PAYMENT_RECEIVER_ADDRESS!,
    price: parseFloat(process.env.PREMIUM_PRICE || '0.01'),
  }),
  (req, res) => {
    // Payment is automatically verified by the middleware
    // req.payment contains the payment details
    res.json({
      success: true,
      message: 'Premium data unlocked via RelAI!',
      payment: req.payment
    });
  }
);

// Start server
app.listen(PORT, () => {
  console.log(`Server running on http://localhost:${PORT}`);
});