Webhooks Integration Guide

Notification content and structure

The notification body contains the type of notification and its payload.

{
  "type": [notification_type],
  "action": [status],
  "payload": [content]
}

Parameter	Description	Format	Required
type	Type of the notification PAYMENT This type of notification is sent when a payment is created or updated in the system. REGISTRATION This type of notification is sent when a registration is created or deleted. RISK This type of notification is sent when a risk transaction is created or deleted.	(PAYMENT\|REGISTRATION\|RISK)	required
action	Indicator of status change. This field is available only if the type is REGISTRATION. CREATED when registration has been created. UPDATED when registration has been updated. DELETED when registration has been deleted.	(CREATED\|UPDATED\|DELETED)	conditional
payload	Content of the notification. If the notification type is payment or registration, the payload's content will be identical to the response you received on the payment or registration.	JSON	required

Example - payment

{
   "type":"PAYMENT",
   "payload":{
      "id":"8a829449515d198b01517d5601df5584",
      "paymentType":"PA",
      "paymentBrand":"VISA",
      "amount":"92.00",
      "currency":"EUR",
      "presentationAmount":"92.00",
      "presentationCurrency":"EUR",
      "descriptor":"3017.7139.1650 OPP_Channel ",
      "result":{
         "code":"000.100.110",
         "description":"Request successfully processed in 'Merchant in Integrator Test Mode'"
      },
      "authentication":{
         "entityId":"8a8294185282b95b01528382b4940245"
      },
      "card":{
         "bin":"420000",
         "last4Digits":"0000",
         "holder":"Jane Jones",
         "expiryMonth":"05",
         "expiryYear":"2018"
      },
      "customer":{
         "givenName":"Jones",
         "surname":"Jane",
         "merchantCustomerId":"jjones",
         "sex":"F",
         "email":"jane@jones.com"
      },
      "customParameters":{
         "SHOPPER_promoCode":"AT052"
      },
      "risk":{
         "score":"0"
      },
      "buildNumber":"ec3c704170e54f6d7cf86c6f1969b20f6d855ce5@2015-12-01 12:20:39 +0000",
      "timestamp":"2015-12-07 16:46:07+0000",
      "ndc":"8a8294174b7ecb28014b9699220015ca_66b12f658442479c8ca66166c4999e78"
   }
}

Example - registration

{
   "type":"REGISTRATION",
   "action": "CREATED",
   "payload":{
      "id":"8a82944a53e6a0150153eaf693584262",
      "paymentBrand":"VISA",
      "result":{
         "code":"000.100.110",
         "description":"Request successfully processed in 'Merchant in Integrator Test Mode'",
         "randomField1315125026":"Please allow for new unexpected fields to be added"
      },
      "card":{
         "bin":"420000",
         "last4Digits":"0000",
         "holder":"Jane Jones"
      },
      "authentication":{
         "entityId":"8a8294174b7ecb28014b9699220015ca"
      },
      "redirect":{
         "parameters":[

         ]
      },
      "risk":{
         "score":""
      },
      "timestamp":"2016-04-06 09:45:41+0000",
      "ndc":"8a8294174b7ecb28014b9699220015ca_b1539494024c411684b544574716e608"
   }
}

Example - risk

{
 "type": "RISK",
  "payload": {
    "id": "8ac9a4a86461239601646522acb26523",
    "referencedId": "8ac9a4a86461239601646522aaf96510",
    "paymentType": "RI",
    "paymentBrand": "VISA",
    "presentationAmount": "0.0",
    "result": {
      "code": "000.000.000",
      "description": "Transaction succeeded"
    },
    "card": {
      "bin": "420000",
      "last4Digits": "0000",
      "holder": "Jane Jones",
      "expiryMonth": "03",
      "expiryYear": "2025"
    },
    "authentication": {
      "entityId": "8a8294174b7ecb28014b9699220015ca"
    },
    "redirect": {
      "parameters": []
    },
    "risk": {
      "score": ""
    },
    "timestamp": "2018-07-04 11:52:08+0000",
    "ndc": "8a8294174b7ecb28014b9699220015ca_b1539494024c411684b544574716e608"
  }
}

Encryption

The content of notification is encrypted to protect data from fraud attempts. When converting human-readable string to hexadecimal format, we use UTF-8.

Parameter	Description
Encryption algorithm	AES
Key	[secret of listener] (64-character-long hexadecimal string in configuration)
Key length	256 bits (32 bytes)
Block mode	GCM
Padding	None
Initialization vector	In HTTP header (X-Initialization-Vector)
Authentication tag	In HTTP header (X-Authentication-Tag)

Format of body: Hexadecimal
Format of Initialization Vector: Hexadecimal

Example

Payload
{"type": "PAYMENT"}

Payload in Hexadecimal (after getting bytes in UTF-8)
7B2274797065223A20225041594D454E54227D

Key in Hexadecimal
000102030405060708090A0B0C0D0E0F000102030405060708090A0B0C0D0E0F

Initialization-Vector (Hexadecimal)
3D575574536D450F71AC76D8

Authentication-Tag (Hexadecimal)
19FDD068C6F383C173D3A906F7BD1D83

Encrypted value in Hexadecimal
F8E2F759E528CB69375E51DB2AF9B53734E393

Responding to Notifications

When your service receives a webhook notification, it must return a 2xx HTTP status code. Otherwise, the webhook service considers the notification delivery as failed, and will retry to send the notification later.

Protocol Details

Protocol	HTTPS (HTTP is allowed on test systems only)
HTTP method	POST
Content type	text(text/plain)