implemented a simple backend for mobile banking

src/util/jwt.js

@@ -0,0 +1,15 @@
+const jwt = require('jsonwebtoken');
+const { jwtSecret } = require('../config/config');
+
+function generateToken(payload, expiresIn = '1h') {
+  return jwt.sign({ payload }, jwtSecret, { expiresIn });
+}
+
+function verifyToken(token) {
+  return jwt.verify(token, jwtSecret);
+}
+
+module.exports = {
+  generateToken,
+  verifyToken,
+};