Interactive USSD Services
For All Users

// Build a USSD application with Sendexa
import { USSD } from 'sendexa-ussd';

const client = new USSD({
  apiKey: 'your-api-key',
});

// USSD session handler
app.post('/ussd', async (req, res) => {
  const { sessionId, phoneNumber, input } = req.body;
  
  // Initialize session
  let response = await client.sessions.get(sessionId);
  let menu = '';
  
  // Session management
  if (!response) {
    // Start new session
    menu = `
      Welcome to Sendexa Banking
      1. Check Balance
      2. Transfer Money
      3. Pay Bills
      Enter option:`;
      
    await client.sessions.create({
      sessionId,
      phoneNumber,
      state: 'main_menu',
    });
  } else {
    // Handle user input
    switch(response.state) {
      case 'main_menu':
        if (input === '1') {
          menu = 'Your balance: GH₵ 1,234.56';
        }
        break;
    }
  }
  
  res.send(menu);
});