server.js

const express = require('express');
const cors = require('cors');
require('dotenv').config();

const app = express();

// ─────────────────── Middleware ───────────────────
app.use(cors());
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

// ─────────────────── Routes ──────────────────────

// Health-check endpoint (unprotected)
app.get('/api/health', (_req, res) => {
    res.json({ status: 'ok', timestamp: new Date().toISOString() });
});

// Authentication routes (register / signup & login)
app.use('/api/auth', require('./routes/auth'));

// Wallet routes (address & balance)
app.use('/api/wallet', require('./routes/wallet'));

// Transfer route (send USDC by username)
app.use('/api/transfer', require('./routes/transfer'));

// Transaction history
app.use('/api/transactions', require('./routes/transactions'));

// ─────────────────── Global Error Handler ────────
app.use((err, _req, res, _next) => {
    console.error('Unhandled error:', err.stack);
    res.status(err.status || 500).json({
        success: false,
        message: err.message || 'Internal Server Error',
    });
});

// ─────────────────── Start Server ────────────────
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => {
    console.log(`🚀 Flowpay server running on ${PORT}`);
});

module.exports = app;