verify-sms-code-express.js

import { google } from 'googleapis';

app.post('/verifyCode', function (req, res) {
  const { smsCodem, sessionIdentifier } = req.body;
  
  const identityToolkit = google.identitytoolkit({
    auth: 'GCP_API_KEY',
    version: 'v3',
  });
  //sessionIdentifier comes from when we send the sms message
  const phoneSessionId = getPhoneSessio(sessionIdentifie)
  await identityToolkit.relyingparty.verifyPhoneNumber({
        code: verificationCode,
        sessionInfo: phoneSessionId,
      });
  
 // verification code accepted, update phoneNumberVerified flag in database
 // ...
});