Add full project files

utils/otpExpiry.js

@@ -0,0 +1,16 @@
+const OTP_VALID_MS = 5 * 60 * 1000
+
+const isOtpExpired = (user) => {
+  if (!user?.otp) return true
+  if (!user?.otpSentAt) return false
+  return Date.now() - new Date(user.otpSentAt).getTime() > OTP_VALID_MS
+}
+
+const clearOtp = (UserModel, mobile) =>
+  UserModel.updateOne({ mobile }, { $set: { otp: null, otpSentAt: null } })
+
+module.exports = {
+  OTP_VALID_MS,
+  isOtpExpired,
+  clearOtp
+}