По переходу операции в конечный статус на адрес, переденный в запросе в поле notification.url отправляется нотификация.

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs7NA6ot9a53nxGYelM89
o1imFac04hED3sS8cwzFxi2rxUNQXl2tEiWIHzGy2sEFLDfeN2lvEVCONl7pXlDP
fpFPBNPy6zfSRMq32t319MDOkykBRTRE4GDlU+MPm/u/UOGuHSaFLKKKXVZVyk6o
9K+hI9UfVE5FNjF04vWBrgcnwWQ9+hqNE9EhqxELoQdhbcUz3PnBkjWRKlBXnUBo
9HrboTaRUr+YkyTh6Kh/afQHreKXy8yA0arTT4mpeb5PL06g0B9Ejn4m+wHPN8DW
feY8U8QImoaDT5n+ngxMpqIXv2kokPBATlpno3uj9fKcxivqvEbtNrAA5wRM17Bq
WwIDAQAB
-----END PUBLIC KEY-----

Пример уведомления (версия 2)

POST /test/emptycallback HTTP/1.1
W1-Signature: tLlkXXQWxL+Bz7HNNR133YtjFnOXIJE9fUxdGdKF/deKzglYFjm+XjY8O1gxGj30F1LQWG0wXlqjGXESuJwUrG8QsyiF5SMG83zYwNd3vgA6rKDrhCqUei31qr52havWX3Z8F5c4IoVqJ+iu4sldPRHYKICNE9/gahBerC8WoFHS0PSjdVnb7lCjU126NjuNojI9FZjJLYU8VKxVukFoRCNz6JkBhQO8h5NIb2W8ol6mkTE/hGk37JBvwP5IoOiW8nAxzgJ1MJkjLBxZmRj4jTBYP518/zSljy15KCtkhMq/W3LxtLisKfneNsOEfYeDOrMzBXU9nFLRyWfHAyffBQ==
Content-Type: application/json
Host: payment.payhub.pro
Content-Length: 806

{
  "id" : "1-6-a-630",
  "type" : "REFUND",
  "status" : "SUCCEEDED",
  "externalId" : "ext#42-1770570557387",
  "amounts" : {
    "amount" : {
      "amount" : 5.0,
      "currency" : "USD"
    },
    "payerAmount" : {
      "amount" : 7.5,
      "currency" : "USD"
    },
    "merchantFee" : {
      "amount" : 0.0,
      "currency" : "USD"
    },
    "payerFee" : {
      "amount" : 2.5,
      "currency" : "USD"
    },
    "settlementAmount" : {
      "amount" : -5.0,
      "currency" : "USD"
    }
  },
  "registeredMethods" : [ ],
  "merchantParameters" : {
    "param1" : "anything you want for callback",
    "param2" : null,
    "param3" : null
  },
  "transactions" : [ {
    "type" : "REFUND",
    "status" : "SUCCEEDED",
    "maskedPan" : "411111XXXXXX1111",
    "rejectReason" : null
  } ]
}
HTTP/1.1 404 Not Found
Vary: Origin
Vary: Access-Control-Request-Method
Vary: Access-Control-Request-Headers

Привер уведомления (версия 3)

POST /test/emptycallback HTTP/1.1
W1-Signature: Rr8/GgHRP5xk8DBkpLnylS+7SHLtQHBlbgUi0tGA/6eb/rExF3aUpliY6BWe4FDaiRHyGmf1/s6baNuVuJy2p6Mk7aWQ8g24QGLhfYq+kgw4WGaqyQP/UMknTLPCHamzxOD8ngjoSmyaHlef9OjmUA+iWWTL/gPJMYaglN4V8SF9f4sOuVxP3V4CEHxXL1zfyjKkycA9LeqME4/inNhhZESzsy6JhG0fL4DX1OSFPK+te1aSdEXQCmumQETaz9cTt9K1yB7Mfvrurw+T7oXIB8e44ULXWJB+19baP+nqTCSW+zOip7RIzk2W9oJdrvII5zs7Z1sFV21bOQbvQu5GcA==
Content-Type: application/json
Host: payment.payhub.pro
Content-Length: 929

{
  "id" : "1-1-a-616",
  "type" : "PURCHASE",
  "status" : "SUCCEEDED",
  "externalId" : "ext#25-1770570548057",
  "chargedAmounts" : {
    "amount" : {
      "amount" : 10.57,
      "currency" : "USD"
    },
    "payerAmount" : {
      "amount" : 10.57,
      "currency" : "USD"
    },
    "merchantFee" : {
      "amount" : 0.0,
      "currency" : "USD"
    },
    "payerFee" : {
      "amount" : 0.0,
      "currency" : "USD"
    },
    "settlementAmount" : {
      "amount" : 10.57,
      "currency" : "USD"
    }
  },
  "registeredMethods" : [ {
    "entity" : {
      "id" : "payoutToken-411111-something-1111"
    },
    "type" : "PAYOUT_TOKEN"
  } ],
  "merchantParameters" : {
    "param1" : "anything you want for callback",
    "param2" : null,
    "param3" : null
  },
  "transactions" : [ {
    "type" : "PURCHASE",
    "status" : "SUCCEEDED",
    "maskedPan" : "411111XXXXXX1111",
    "rejectReason" : null
  } ]
}
HTTP/1.1 404 Not Found
Vary: Origin
Vary: Access-Control-Request-Method
Vary: Access-Control-Request-Headers