Integration

​

Twilio

​

Create a new App on Twilio

1. Once you log in to Twilio, create a new app.
2. Make a note of Account SID and Auth Token for later use.
3. Click on “Get a Trial number” to get the Sender number. (Use the paid number if you already have one)
4. Make a note of the sender’s phone number for later use.

​

Store contact details

​

Enable SMS Notifications

1. Login to CometChat dashboard and select your app.
2. Navigate to Notifications > Notifications in the left-hand menu.
3. Enable SMS notifications feature.

​

Save Twilio credentials

• Twilio Account SID
• Twilio Auth token
• Twilio sender phone number

​

Save user’s timezone

• For US region: EST
• For EU region: GMT
• For IN region: Asia/Kolkata

​

Receive notifications

​

Custom SMS provider

​

Pre-requisite

1. Your webhook endpoint must be accessible over HTTPS. This is essential to ensure the security and integrity of data transmission.
2. This URL should be publicly accessible from the internet.
3. Ensure that your endpoint supports the HTTP POST method. Event payloads will be delivered via HTTP POST requests in JSON format.
4. Configure your endpoint to respond immediately to the CometChat server with a 200 OK response. The response should be sent within 2 seconds of receiving the request.
5. For security, it is recommended to set up Basic Authentication that is usually used for server-to-server calls. This requires you to configure a username and password. Whenever your webhook URL is triggered, the HTTP Header will contain:

Authorization: Basic <Base64-encoded-credentials>

​

Add credentials

1. Click on the ”+ Add Credentials” button.
2. Enable the provider.
3. Enter the publically accessible Webhook URL.
4. It is recommended to enable Basic Authentication.
5. Enter the username and password.
6. Enabling the “Trigger only if phone number is stored with CometChat” setting requires users’ phone numbers to be stored with CometChat using the Update Contact details API. When enabled, the webhook is triggered only for those users. If this setting is disabled, the webhook triggers regardless of whether users’ phone numbers are stored with CometChat.
7. Save the credentials.

​

How does it work?

{
  "trigger": "sms-notification-payload-generated",
  "data": {
    "to": {
      "uid": "cometchat-uid-1",
      "phno": "+919299334134", // Optional
      "name": "Andrew Joseph"
    },
    "messages": [
      {
        "sender": {
          "uid": "cometchat-uid-4",
          "avatar": "https://assets.cometchat.io/sampleapp/v2/users/cometchat-uid-4.webp",
          "name": "Susan Marie"
        },
        "message": "Are we meeting on this weekend?"
      },
      {
        "sender": {
          "uid": "cometchat-uid-4",
          "avatar": "https://assets.cometchat.io/sampleapp/v2/users/cometchat-uid-4.webp",
          "name": "Susan Marie"
        },
        "message": "📷 Has shared an image"
      }
    ],
    "senderDetails": {
      "uid": "cometchat-uid-4",
      "name": "Susan Marie",
      "avatar": "https://assets.cometchat.io/sampleapp/v2/users/cometchat-uid-4.webp"
    },
    "smsContent": "You've received new messages from Susan Marie! Read them at https://your-website.com/chat."
  },
  "appId": "app123",
  "region": "us/eu/in",
  "webhook": "custom"
}

​

Sample server-side code

const express = require('express');
const app = express();
const PORT = process.env.PORT || 3000;

app.use(express.json());

// Optional: Basic authentication middleware
const basicAuth = (req, res, next) => {
  const authHeader = req.headers['authorization'];
  if (!authHeader || !authHeader.startsWith('Basic ')) {
    return res.status(401).json({ message: 'Unauthorized' });
  }
  next();
};

const triggerSMSNotification = async (to, data) => {
  let { name, uid, phno } = to;
  let { groupDetails, senderDetails, smsContent } = data;

  if (groupDetails) {
    console.log('Received webhook for group SMS notification');
  }

  if (senderDetails) {
    console.log('Received webhook for one-on-one SMS notification');
  }

  if (phno == null) {
    // Your implementation to fetch Phone number
    phno = await fetchPhoneNumberFor(uid);
  }

  // Your implementation for sending the SMS notification
  await sendSMS(phno, smsContent);
};

app.post('/webhook', basicAuth, (req, res) => {
  const { trigger, data, appId, region, webhook } = req.body;

  if (
    trigger !== 'sms-notification-payload-generated' ||
    webhook !== 'custom'
  ) {
    return res.status(400).json({ message: 'Invalid trigger or webhook type' });
  }

  console.log('Received Webhook:', JSON.stringify(req.body, null, 2));

  triggerSMSNotification(to, data)
    .then((result) => {
      console.log(
        'Successfully triggered SMS notification for',
        appId,
        to.uid,
        result
      );
    })
    .catch((error) => {
      console.error(
        'Something went wrong while triggering SMS notification for',
        appId,
        to.uid,
        error.message
      );
    });

  res.status(200).json({ message: 'Webhook received successfully' });
});

app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}`);
});

​

Next steps