Node.js (using Express.js)

// transaction-interface.js
const express = require('express');
const app = express();

app.use(express.json());

app.post('/submit-transaction', async (req, res) => {
  const { patientName, billingDetails, insuranceClaims } = req.body;
  // Call AI validation engine API
  const validationResult = await fetch(`https://ai-validation-engine.com/validate`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ patientName, billingDetails, insuranceClaims }),
  });
  if (validationResult.ok) {
    // Record transaction in blockchain
    await fetch(`https://blockchain-network.com/record-transaction`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ patientName, billingDetails, insuranceClaims }),
    });
    res.status(201).send('Transaction submitted successfully!');
  } else {
    res.status(400).send('Transaction validation failed!');
  }
});

app.listen(3000, () => {
  console.log('Transaction interface listening on port 3000');
});