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: sSSc74reUVz5rx5I1VvNuOL4diDOAPiCjHNlz6D54yikgf7XIJ/q+aHWPlB32dh2/9t1h4+8FBbyo0+KgfPNKviGNClBFzD8ZqUo5LrG32KBS70DiFbP5AmGH/rtDxNqdoowVWLE/tjsCC4PdbVaXkTnO2xtKRVnHnD+vKvJX/EuvhaPolX94ZNo9WZVUlTTilAERXbge7KTKwgesQBL4Vxb2o5CtHqeBPPXnBtgFA5skgX1/dNeYl7mMbrF2eJBSjQHVI88N63dVVP9+Zg6mqAM2W9QNDhg2Kz6HzAavSC7Gii6fVj224q9DIw5z46pMIKwRHQE8AkqHAvCFnYPaQ==
Content-Type: application/json
Host: payment.flexo.systems
Content-Length: 791

{
  "id" : "1-6-a-35",
  "type" : "REFUND",
  "status" : "SUCCEEDED",
  "externalId" : "ext#43",
  "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/1.1 200 OK
Vary: Origin
Vary: Access-Control-Request-Method
Vary: Access-Control-Request-Headers

Привер уведомления (версия 3)

POST /test/emptycallback HTTP/1.1
W1-Signature: rBMipSU8p+GVxUxXziJzm3Fk1tx4r+5Llt+NZpn31AdvFXT5kQnZVy6E4oPti/EeqHgm2W3JSPFEyw/3fSzBsl/NHV7fsRTEy4kWzX/5/pPyQ6E2DFJQgLC/1tb/Oyw6VxW8879NI0HMoK9NoufbuhSabU88t152KRuFycGhxYvF9/AuAY3dAvpKxATGwmd8TYbfd3Y948hd5OWaFe7B7SvAje24lcdsCjJVfuWXnhJtlO8wnIMoFw5dc6RIqACKPbcdIztSHrZ6blb9dIeDc78avSJ84bqT3W3XRqHEIjTTgMkVjavkol8zQt8nuK1/fDlqjojEJsMHBlmPJjlOJQ==
Content-Type: application/json
Host: payment.flexo.systems
Content-Length: 914

{
  "id" : "1-1-a-20",
  "type" : "PURCHASE",
  "status" : "SUCCEEDED",
  "externalId" : "ext#25",
  "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/1.1 200 OK
Vary: Origin
Vary: Access-Control-Request-Method
Vary: Access-Control-Request-Headers