index.js

const express = require('express');
const fetch = require('node-fetch');
const path = require('path');

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

// Serve static files
app.use(express.static('public'));

// API endpoint to fetch transaction data
app.get('/api/transactions/:address', async (req, res) => {
  try {
    const address = req.params.address;
    const response = await fetch(`https://blockstream.info/api/address/${address}/txs`);
    
    if (!response.ok) {
      throw new Error(`API error: ${response.status}`);
    }
    
    const transactions = await response.json();
    res.json(transactions);
  } catch (error) {
    console.error('Error fetching transactions:', error);
    res.status(500).json({ error: 'Failed to fetch transaction data' });
  }
});

// Send the main page for any other route
app.get('*', (req, res) => {
  res.sendFile(path.join(__dirname, 'public', 'index.html'));
});

app.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
  console.log(`Open http://localhost:${PORT} in your browser`);
});