Reach users
without internet.
On any phone.

import express from "express";
const app = express();
app.use(express.urlencoded({ extended: true }));

// Sendexa sends a POST to this endpoint on every user input
app.post("/ussd", (req, res) => {
  const { sessionId, msisdn, text } = req.body;
  const parts = text.split("*");
  const level = parts.length;

  let response = "";

  if (text === "") {
    // First request — show main menu
    response = "CON Welcome to MyBank\n";
    response += "1. Check Balance\n";
    response += "2. Send Money\n";
    response += "3. Buy Airtime";
  } else if (text === "1") {
    // Fetch balance from your DB
    const balance = await getBalance(msisdn);
    response = `END Your balance is GHS ${balance}`;
  } else if (text === "2") {
    response = "CON Enter recipient number:";
  } else if (level === 2 && parts[0] === "2") {
    response = "CON Enter amount (GHS):";
  } else if (level === 3 && parts[0] === "2") {
    const [, to, amount] = parts;
    response = `CON Confirm: send GHS ${amount} to ${to}?\n1. Yes\n2. No`;
  } else if (level === 4 && parts[3] === "1") {
    await sendMoney(msisdn, parts[1], parts[2]);
    response = "END Transfer successful!";
  }

  res.set("Content-Type", "text/plain");
  res.send(response);
});