start-verify.js

/**
 *  Start Verification
 *
 *  This Function shows you how to send a verification token for Twilio Verify.
 *
 *  Pre-requisites
 *  - Create a Verify Service (https://www.twilio.com/console/verify/services)
 *  - Add VERIFY_SERVICE_SID from above to your Environment Variables (https://www.twilio.com/console/functions/configure)
 *  - Enable ACCOUNT_SID and AUTH_TOKEN in your functions configuration (https://www.twilio.com/console/functions/configure)
 *
 *
 *  Returns JSON
 *  {
 *    "success": boolean,
 *    "error": {                // not present if success is true
 *      "message": string,
 *      "moreInfo": url string
 *    }
 *  }
 */

exports.handler = function (context, event, callback) {
  const response = new Twilio.Response();
  response.appendHeader("Content-Type", "application/json");

  // uncomment to support CORS
  // response.appendHeader('Access-Control-Allow-Origin', '*');
  // response.appendHeader('Access-Control-Allow-Methods', 'POST, OPTIONS');
  // response.appendHeader('Access-Control-Allow-Headers', 'Content-Type');

  if (typeof event.to === "undefined") {
    response.setBody({
      success: false,
      error: {
        message: "Missing parameter; please provide a phone number or email.",
        moreInfo: "https://www.twilio.com/docs/verify/api/verification",
      },
    });
    response.setStatusCode(400);
    return callback(null, response);
  }

  // DELETE THIS BLOCK IF YOU WANT TO ENABLE THE VOICE CHANNEL
  // Learn more about toll fraud
  // https://www.twilio.com/docs/verify/preventing-toll-fraud
  if (event.channel === "call") {
    response.setBody({
      success: false,
      error: {
        message:
          "Calls disabled by default. Update the code in <code>start-verify.js</code> to enable.",
        moreInfo: "https://www.twilio.com/docs/verify/preventing-toll-fraud",
      },
    });
    response.setStatusCode(400);
    return callback(null, response);
  }

  const client = context.getTwilioClient();
  const service = context.VERIFY_SERVICE_SID;
  const to = event.to;
  const channel = typeof event.channel === "undefined" ? "sms" : event.channel;
  const locale = typeof event.locale === "undefined" ? "en" : event.locale;

  client.verify
    .services(service)
    .verifications.create({
      to: to,
      channel: channel,
      locale: locale,
    })
    .then((verification) => {
      console.log(`Sent verification: '${verification.sid}'`);
      response.setStatusCode(200);
      response.setBody({
        success: true,
      });
      callback(null, response);
    })
    .catch((error) => {
      console.log(error);
      response.setStatusCode(error.status);
      response.setBody({
        success: false,
        error: {
          message: error.message,
          moreInfo: error.moreInfo,
        },
      });
      callback(null, response);
    });
};