Webhooks are server callbacks to your server from Cashfree. Webhooks are event-based and are sent when specific events related to the transaction happen.

Configure Webhook

1. Add your webhook through the merchant dashboard for the first time. Write to [email protected] to edit your Webhook endpoint.
2. Ensure you do not process duplicate events.
3. Below is the list of events for which we will be notifying on your webhook and a list of parameters being sent.

We support webhooks in both encoded and JSON formats.

Amount Collected

The AMOUNT_COLLECTED webhook notifies that money has been received in your Cashfree Virtual account through Auto Collect.

Webhook parameters and descriptions are available below:

📘

Note:

With effect from Feb 4, 2022, we will be adding two new parameters to the ‘Amount Collected’ Webhook i.e ‘transferType’ and ‘remarks.’
‘transferType’ will notify the mode through which the transaction was made to your Auto Collect Virtual account, such as NEFT, RTGS, UPI, or IMPS.
‘remarks’ will be the remarks that the customer passes when the transaction is initiated.

Transfer Rejected

The TRANSFER_REJECTED webhook notifies that the transfer request was received, but has been rejected due to some reason (mentioned in the field reason).

Amount Settled

The AMOUNT_SETTLED webhook notifies that the settlement has been made.

Example - AMOUNT_COLLECTED webhook

{
    "event":"AMOUNT_COLLECTED",
    "amount":"400",
    "vAccountId":"abcd123",
    "virtualVpaId":"cashmelgabcd123@yesbankltd",
    "isVpa":"1",
    "email":"[email protected]",
    "phone":"9876543210",
    "referenceId":87654,
    "utr":"N123456789",
    "creditRefNo":"0976541123",
    "remitterAccount":"123455666778",
    "remitterName":"CASHFREE PAYMENTS",
    "paymentTime":"2019-07-20 15:27:37",
    "signature":"8uV792gBZaasJHBFSsfaMHLuqnZKkoBFjw9gEJ8Sx85V+jgbpg4ME="
}

Refunds

For refunds, we support the following three webhooks:

• Refund Success
• Refund Failed
• Refund Reversed

Refund Success

The REFUND_SUCCESS webhook notifies whenever a refund attempted is successful at the bank (the account is debited), and the beneficiary bank has deposited the money and confirmed it.

Webhook parameters and descriptions are available below:

Refund Failed

The REFUND_FAILED webhook notifies whenever a refund attempt fails.
Webhook parameters and descriptions are available below:

Refund Reversed

The REFUND_REVERSED webhook notifies whenever the beneficiary bank reverses the refund.

Webhook parameters and descriptions are available below:

Webhook Sample

{
   "amount": "250.12",
   "referenceId": "100",
   "cacRefundId": "98",
   "createdAt": "2022-03-13 22:30:38",
   "event": "REFUND_SUCCESS",
   "fundStatus": "CREDITED_TO_CUSTOMER",
   "merchantRefId": "test100",
   "note": "test",
   "refundRemarks": "Transfer completed successfully",
   "refundStatus": "SUCCESS",
   "refundUtr": "1647190899292747",
   "signature": "1WP7Pm5CQ1XpLLO+0zups2E6ae/VyMq4MMPAWpC8syE=",
   "updatedAt": "2022-03-13 22:31:39"
}

Vendor Settlement

The VENDOR_SETTLEMENT_WEBHOOK notifies when a settlement has been made to the vendor.

Verify Signature

Verifying the signature (passed along with the POST parameters) is mandatory before you process any response. We also recommend whitelisting only our IP address on your webhook endpoint.

Follow the steps below to calculate and verify the signature passed:

1. Get all the POST parameters except ‘signature’ and assign it to an array as key-value pair.
2. Sort the array based on keys.
3. Concatenate all the values in this array and the resultant is the post data (say, postData).
4. postData needs to be encrypted using SHA-256 and then base64 encoded.
5. Now verify if the signature calculated and the signature received a match. Proceed further if it matches.

Do not go live without verifying the signature.

The following code snippets show you how to generate and verify the signature. This should not be assumed production-ready, kindly consider adding necessary validation before processing.

$data = $_POST;
  $signature = $_POST["signature"];
  unset($data["signature"]);
  // $data now has all the POST parameters except signature
  ksort($data);  // Sort the $data array based on keys
  $postData = "";
  
  foreach ($data as $key => $value){
    if (strlen($value) > 0) {
      $postData .= $value;
    }
  }
  $hash_hmac = hash_hmac('sha256', $postData, $clientSecret, true) ;
  // Use the clientSecret from the oldest active Key Pair.
  $computedSignature = base64_encode($hash_hmac);
  if ($signature == $computedSignature) {
    // Proceed based on $event 
  } else {
    // Reject this call 
  }
?>

import javax.crypto.spec.SecretKeySpec;
import javax.crypto.Mac;
import org.apache.commons.codec.binary.Base64;
public class ComputedSignature {
    public static String generateHMAC(String clientSecret, String data) {
        String hash = null; //data is a string which has the json sorted through keys and concatenated values
        try {
            String secret = clientSecret;
            String message = data;
            Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
            SecretKeySpec secret_key = new SecretKeySpec(secret.getBytes(),"HmacSHA256");
            sha256_HMAC.init(secret_key);
            hash = Base64.encodeBase64String(sha256_HMAC.doFinal(message.getBytes()));
        }
        catch (Exception e){ //Log it
        }
        return hash;
    }
}