Ch 7 - (2020-01-16 Update) - Amount & Currency Validation

Changes made on 2020-01-16 are delineated below.

Additions are underlined in Green. Deletions are underlined in Red. Modifications are underlined in Blue.

Change Log:

Under Step 9: Handling the CCA Response
- Added a NOTE to indicate recommendation to validate Amount & Currency values prior to authorization
Added JSON syntax highlighting to response JWT example
- The blue/green values present in this content do not indicate specific modifications/additions

The below example is what you should expect the response JWT to contain on a successful CCA transaction.

{
  "iss": "5b7eb7072f3e7305c029cd39",
  "iat": 1576870062,
  "exp": 1576877262,
  "jti": "0316f090-17af-4c91-b840-94a44fac198c",
  "ConsumerSessionId": "0_00b447b6-9072-4c21-9c7f-09a0d535fc6f",
  "ReferenceId": "0_00b447b6-9072-4c21-9c7f-09a0d535fc6f",
  "aud": "c56797a0-235e-11ea-96b5-9b6c28b8308b",
  "Payload": {
    "Validated": true,
    "Payment": {
      "Type": "CCA",
      "ProcessorTransactionId": "Mbmr4329wVoH43M3w7a0",
      "ExtendedData": {
        "Amount": "1500",
        "CAVV": "MTIzNDU2Nzg5MDEyMzQ1Njc4OTA=",
        "CurrencyCode": "840",
        "ECIFlag": "05",
        "ThreeDSVersion": "2.1.0",
        "PAResStatus": "Y",
        "SignatureVerification": "Y"
      }
    },
    "ActionCode": "SUCCESS",
    "ErrorNumber": 0,
    "ErrorDescription": "Success"
  }
}

NOTE: It is highly recommended that you verify the Amount and Currency values within the response prior to sending to authorization. The values returned on payments.validated will represent the values used during authentication; these values should match the values at the time of authorization. Currently, Amount and Currency will only be returned on EMV 3DS transactions. Additional work to populate these values in all 3DS versions is underway.