This page describes the Asseco 3DS Service and the integration procedure with the 3DS Server.

Introduction

Service methods

The service consists of the following methods:

v2Supported – method that will check the supported version of the 3D Secure protocol for a card. The use of this method is optional and could be used in environments where fallback to 3DS 1.0.2 should be supported.
createTransaction – method that performs the AReq/ARes part of the flow and returns the status of the check for browser-initiated transactions.
authenticationResult – method that returns the authentication status for a specific 3D Secure transaction.

Security

All communication between 3DS Requestor and 3DS Service is done through a mutually authenticated TLS1.2 channel. SSL and other versions of TLS are not supported.

Integration

In order to successfully perform 3DS2 transactions, PGW’s should integrate themselves with the Asseco 3DS Server.

There are two types of 3DS2 transactions:

Transactions where the Issuer has determined that Challenge isn’t necessary. Issuer will determine whether the transaction should be authorized or not, depending on the status of the transaction.

Transactions where the cardholder will have to authenticate himself in order to successfully finish the transaction.

Fallback to 3DS v1

Fallback to v1 is not in the scope of this document since 3DS Server doesn’t handle fallback to v1 internally. It is up to the 3DS Requestors to implement the fallback functionality based on the response received from 3DS Server.

User enters card details and selects checkout
3DS Requestor initializes the transaction and calls the v2Supported method of 3DS Server.
3DS Server checks the cache and returns the response to v2Supported
3DS Requestor checks the status of the response v2Supported method
If status equals V1_SUPPORTED the 3DS Requestor should fallback to v1. Optionally, since status ERROR means that some unexpected error occurred 3DS requestors can also fallback to v1.
1. 3DS Requestor should call MPI to check the enrollment of card in 3DS v1
2. MPI sends the VEReq to Directory Server for v1
3. Directory Server checks the enrollment and returns the VERes to MPI
4. MPI evaluates the received VERes and returns the enrollment response to 3DS Requestor
5. 3DS Requestor handles the transaction according to the received enrollment status.

3DS Method Handling

The 3DS Method allows for additional browser information to be gathered by an ACS prior to receipt of the AReq message to help facilitate the transaction risk assessment. The use of the 3DS Method by an ACS is optional.

If the response of the v2Supported method has the 3dsMethodUrl set the 3DS Requestor should invoke the 3DS Method URL.
1. Create a JSON object with the 3DS Method Data elements, then Base64url encode the JSON object.
2. Render a hidden HTML iframe in the Cardholder browser and send a form with a field named threeDSMethodData containing the JSON Object via HTTP POST to the ACS 3DS Method URL.
3. If the 3DS Method completes within 10 seconds, then the 3DS Requestor will notify the 3DS Server to set the 3DS Method Completion Indicator = Y. If the 3DS Method does not complete in 10 seconds, set the 3DS Method Completion Indicator to = N.
Otherwise, the 3DS Requestor will use the value U for 3DS Method Completion Indicator parameter of createTransaction method.

Allowed values for 3DS Method Completion Indicator are:

Y - Successfully completed
N - Did not successfully complete
U - Unavailable - 3DS Method URL was not present in the PRes message data for the card range associated with the Cardholder Account Number.

The following table defines the data elements sent in the 3DS Method. The data is exchanged between the 3DS Requestor via the cardholder browser.

The HTTP field name is threeDSMethodData.

The property is a JSON object that consists of two parameters:

Data Element/Field Name	Description
threeDSMethodNotificationURL	The URL that will receive the notification of 3DS Method completion from the ACS. This is sent in the initial request to the ACS from the 3DS Requestor executing the 3DS Method.
threeDSServerTransID	A unique identifier for the transaction that will be the same as the 3DS Server Transaction ID in the AReq message.

3DS Server transaction ID: 25c1b02f-ec99-4b95-bc74-f257fd66b2ee

3DS Method Notification URL: https://nestpay.tr/core/tdsMethodCallback

Generated threeDSMethodData object:

{
    "threeDSMethodNotificationURL":https://nestpay.tr/core/tdsMethodCallback",
    "threeDSServerTransID":"25c1b02f-ec99-4b95-bc74-f257fd66b2ee"
}

Base64 encoded threeDSMethodData:

base64Encoded(Generated threeDSMethodData)

Generated HTML form containing the threeDSMethodData:

<form name="MethodForm" action="<3dsMethodUrl>" method="POST">
    <input type="hidden" name="threeDSMethodData" value="base64Encoded(Generated threeDSMethodData)">
</form>

Transaction flow

The flow of a 3DS2 transaction is as follows, this doesn’t include steps before checkout, but only after it has been determined that 3DS2 is necessary.

Call the v2Supported method in order to check whether 3DS2 is supported for the card identified by PAN and channel on which the transaction is being executed.
- If the response has been received check the received status:
  - V2_VERSION_NOT_SUPPORTED – The supported version of 3DS2 by the Issuer is not supported by the 3DS Server. Because of that the processing should stop and the transaction should not be authorized.
  - ERROR – There has been some error on the 3DS Server. It is up to 3DS Requestor to decide whether they want to terminate the transaction or fallback to 3DS v1.
  - V1_SUPPORTED – Card is not found inside of 3DS Servers cache, meaning v2 is not supported, so it is assumed that v1 is supported. 3DS Requestor sholud fallback to 3DS v1.
V2_SUPPORTED – 3DS2 is possible for the card and the processing should continue.
- If 3dsMethodUrl parameter is set, do the steps described in 3DS Method Handling chapter
- Fetch the cardholder and transaction data necessary for createTransaction method.
- Call the createTransaction method.
- If the call returned the response, check the returned transactionStatus
  - If the transStatus != C, Challenge isn’t necessary, fetch the authentication data from the response.
    - If transStatus == Y or transStatus == A, fetch the authenticationValue and eci values and use them in authorization request for the transaction.
    - Otherwise
      - terminate the processing and don’t authorize the transaction.
      - fetch the cardholderInfo, and if it contains any data, show that information to the cardholder on the merchant’s site.
  - Otherwise perform the challenge of the cardholder
    - Generate and prepare the response as described in chapter CReq request
    - Send the generated request to the cardholder
  - If the response is received on the Notification URL, call the authenticationResult method of the 3DS Server
    - If the method returned a result, check the authenticated parameter
      - If authenticated == true, fetch the authenticationValue and eci values and use them in authorization request for the transaction.
      - Otherwise, terminate the processing and don’t authorize the transaction.
    - Otherwise, terminate the processing and don’t authorize the transaction.
  - In case of timeout, also call the authenticationResult method of the 3DS Server
    - If the method returned a result, check the authenticated parameter
      - If authenticated == true, fetch the authenticationValue and eci values and use them in authorization request for the transaction.
      - Otherwise, terminate the processing and don’t authorize the transaction.
    - Otherwise, terminate the processing and don’t authorize the transaction.
  - Otherwise, terminate the processing and don’t authorize the transaction.
- Otherwise, terminate the processing and don’t authorize the transaction.

Note: Only transactions with transStatus A or Y are considered authenticated and should have the authenticationValue and eci set.

In case of transactions with Mastercard cards, eci flag will be set for all transaction statuses except status E.

When checking the Authentication results of a transaction the following procedure should be done:

Cardholder info

If the transaction is declined during the initial AReq/ARes exchange, meaning there haven’t been any authentication requests towards users, issuers can set the cardholderInfo property of the ARes response which contains additional information for cardholders that might be necessary for the successful execution of 3DS2 transaction.

3DS Server will return cardholderInfo in the response of the authenticationResult method.

The recommendation is to show this information, if available, to users on the merchant’s screen.

Request timeouts

Since at one point in the transaction the processing will be done between ACS and the cardholder, timeouts for requests/responses should be enforced.

This is especially important when waiting for a response from the ACS on the Notification endpoint.

PGW’s should have the option to define a timeout, so that after it has been reached the authentication light box/iframe should be closed/hidden, and authenticationResult of the 3DS Server should be called.

The further processing should depend on the returned authentication status.

Methods

Method v2Supported

The method that checks whether the card can be used to perform a 3DS2 transaction or not. The method will also return the 3DS Method URL if defined by the Issuer of the card.

Depending on the received status, 3DS Requestor should continue with the 3DS v2 transaction, fallback to v1 or end processing.

Path	/v2Supported/check
Supported methods	POST
Consumes	application/json
Produces	application/json

Parameter	Type	Description
pan	String	13-19 digit string representing a valid card PAN.
deviceChannel	String	Indicates the type of channel interface being used to initiate the transaction. Values accepted: 01 = App-based (APP) 02 = Browser (BRW) 03 = 3DS Requestor Initiated (3RI)

The response code when the input (PAN) is invalid should be 405. Otherwise, the service should return the status and the URL of the 3DS Server Transaction ID and 3DS Method.

The status can be one of the following values:

V2_VERSION_NOT_SUPPORTED – The supported version of 3DS2 by the Issuer is not supported by the 3DS Server. Because of that the processing should stop and the transaction should not be authorized.
ERROR – There has been some error on the 3DS Server. It is up to 3DS Requestor to decide whether they want to terminate the transaction or fallback to 3DS v1.
V1_SUPPORTED – Card is not found inside of 3D Servers cache, meaning v2 is not supported, so it is assumed that v1 is supported. 3DS Requestor should fallback to 3DS v1.
V2_SUPPORTED – 3DS2 is possible for the card and the processing should continue.

{
    "pan": 4308331682827506,
    "deviceChannel": "02"
}

{
    “versionStatus”: “V2_SUPPORTED”,
    “3dsMethodUrl”: “https://nekiurl.con/3dsmethod”,
    “3dssTransactionId”: “123e4567-e89b-12d3-a456-556642440000”
}

Method createTransaction

The method that generates the AReq message and forwards it to the Directory Server to see if Frictionless or Challenge flow should be performed.

Path	/createTransaction
Path with transaction id	/createTransaction/{3DSS_TRANSACTION_ID}
Supported methods	POST
Consumes	application/json
Produces	application/json

3DSS_TRANSACTION_ID is an optional parameter. If set the same value as received in the response of v2Supported method should be used. Otherwise, 3DSS will generate and return the value for 3DSS_TRANSACTION_ID in the response.

Values for some arguments of createTransaction are derived from functionalities and/or values available in 3DS requestor environment.

Those values should be generated by the 3DS Requestor the following way:

addrMatch is a parameter that defines whether the billing and shipping addresses are the same.

The parameter can have the following values:

Y = Shipping Address matches Billing Address
N = Shipping Address does not match Billing Address

3DS Requestor should compare the two addresses and set the appropriate value for addrMatch.

payTokenInd is an optional flag that says whether the Cardholder’s PAN has been de-tokenized by the 3DS Requestor.

The only accepted value for payTokenInd is true.

If there hasn’t been any de-tokenization of Account Number on 3DS Requestor side, this parameter should not be included in the call of the createTransaction method.

Parameter	Type	Mandatory	Description
messageCategory	int	Mandatory	Message category. Can have one of two values: Payment AuthenticationNon Payment Authentication
deviceChannel	String	Mandatory	Indicates the type of channel interface being used to initiate the transaction. Values accepted: 01 = App-based (APP) 02 = Browser (BRW) 03 = 3DS Requestor Initiated (3RI)
threeRiData	JSON Object	Optional	Indicates the type of 3RI request.
threeDSCompInd	String	Mandatory	Indicates whether the 3DS Method successfully completed. Values accepted: Y = Successfully completed N = Did not successfully complete U = Unavailable - 3DS Method URL was not present in the PRes message data for the card range associated with the Cardholder Account Number.
pan	String	Mandatory	13-19 digit string representing a valid card PAN.
cardExpiry	String	Mandatory	Expiry date of the card or token. String, 4 characters Format accepted: YYMM
payTokenInd	String	Mandatory	A value of True indicates that the transaction was de-tokenised prior to being received by the ACS. This data element will be populated by the system residing in the 3-D Secure domain where the de-tokenisation occurs (i.e., the 3DS Server or the DS). Note: The Boolean value of true is the only valid response for this field when it is present.
3dsrMerchantId	String	Deprecated	3DS Requestor assigned Merchant identifier. String, maximal length 35 characters. Unused
merchantId	String	Mandatory	Merchant identifier registered at directory server. String, maximal length 40 characters.
acquirerBin	String	Mandatory	Acquiring institution identification code as assigned by the DS. String, maximal length 11 characters.
threeDSRequestor	JSON object	Mandatory	JSON Object containing 3DS requestor info.
billingAddress	JSON object	Mandatory (if available), unless market or regional mandate restricts sending this information.	JSON object containing the billing address for the transaction.
shippingAddress	JSON object	Mandatory (if available), unless market or regional mandate restricts sending this information.	JSON object containing the shipping address for the transaction.
addrMatch	String	Mandatory	A parameter that defines whether the billing and shipping addresses are the same. Y: Shipping Address matches Billing Address N: Shipping Address does not match Billing Address
email	String	Mandatory (if available), unless market or regional mandate restricts sending this information.	Email of the Cardholder. String, maximum 254 characters Value accepted: Shall meet requirements of Section 3.4 of IETF RFC 5322.
cardholderName	String	Mandatory (if available), unless market or regional mandate restricts sending this information.	Name of the Cardholder, 2 – 45 characters.
homePhone	JSON Object	Mandatory (if available), unless market or regional mandate restricts sending this information.	JSON Object containing information about Cardholders home phone.
mobilePhone	JSON Object	Mandatory (if available), unless market or regional mandate restricts sending this information.	JSON Object containing information about Cardholders mobile phone.
workPhone	JSON Object	Mandatory (if available), unless market or regional mandate restricts sending this information.	JSON Object containing information about Cardholders work phone.
merchant	JSON Object	Mandatory	JSON object containing Merchant data.
purchase	JSON Object	Mandatory	JSON object containing Purchase data.
transType	String	Mandatory	Identifies the type of transaction being authenticated. String 2 characters.
acctType	String	Mandatory	Indicates the type of account. Length: 2 characters Values accepted: 01 = Not Applicable 02 = Credit 03 = Debit
acctID	String	Optional	Additional information about the account optionally provided by the 3DS Requestor. String, maximum 64 characters.
account	JSON Object	Mandatory	Refer to Table A.8 of the Protocol and Core Functions Specification for data elements.
purchaseInstalData	String	Conditional Required if 3DS Requestor Authentication Indicator = 03. Omitted if not an instalment payment authentication.	Three numerical characters. Value should be greater than 1.
merchantRiskIndicator	JSON Object	Optional	Merchant’s assessment of the level of fraud risk for the specific authentication for both the cardholder and the authentication being conducted. Refer to *Table A.9* of the Protocol and Core Functions Specification for data elements.
recurringExpiry	String	Conditional Required if 3DS Requestor Authentication Indicator = 02 or 03.	Date after which no further authorizations shall be performed.
recurringFrequency	String	Conditional Required if 3DS Requestor Authentication Indicator = 02 or 03.	Indicates the minimum number of days between authorizations.
browser	JSON Object	Mandatory (if available), unless market or regional mandate restricts sending this information.	JSON object containing browser data.
notificationUrl	String	Mandatory	Notification URL is the URL of an endpoint in the 3DS Requestor environment which will receive the requests from ACS containing the final *CRes* message. The endpoint is usually a part of the Merchant/PGW site.
challengeWindowSize	String	Mandatory	Dimensions of the challenge window that has been displayed to the Cardholder. Values accepted: 01 - 250 x 400 02 - 390 x 400 03 - 500 x 600 04 - 600 x 400 05 - Full screen
protocolVersion	String	Mandatory	Version of 3DS protocol to be used.

Parameter	Type	Mandatory	Description
transStatus	String	Mandatory	Character value defining the status of the execution. In case a valid *ARes* has been received the value should be equal to *transStatus* of the *ARes* message, or in case of an error the status should be E.
threeDSServerTransID	String	Mandatory	Identifier of the 3DS Server transaction.
additionalData	JSON Object	Optional	Optional transaction data that might be returned.
errorCode	String	Optional	Code defining the type of error that as occurred.
errorDescription	String	Optional	Textual description of the error.
eci	String	Optional	Electronic Commerce Indicator. In case of Visa cards, should be only present in case status is A, Y or C. But in case of Mastercard cards can be present for all returned statuses.
authValue	String	Optional	Authentication value generated by the ACS for the transaction, should be only present in case status is A or Y, should be only present in case status is A or Y.
dsTransID	String	Optional	Directory Server identifier of the transaction.
cardholderInfo	String	Optional	Short text, 128 characters, provided by the ACS/Issuer to Cardholder during a Frictionless transaction that was not authenticated by the ACS. The Issuer can optionally provide information to Cardholder. For example, "Additional authentication is needed for this transaction, please contact (Issuer Name) at xxx-xxx-xxxx."
creq	String	Optional	Base64url encoded value of the *CReq* message that should be sent to the ACS.
acsURL	String	Optional	URL of ACS endpoint to which the *CReq* message should be sent.

Example request when calling the method with the 3DS Server identifier e.g. createTransaction/050d09cc-f096-4f97-8043-b34889837887.

{
    "messageCategory": "02",
    "deviceChannel": "02",
    "threeDSCompInd": "Y",
    "pan": "4308331682827506",
    "cardExpiry": "2212",
    "3dsrMerchantId": "3dsr Merchant Id",
    "merchantId": "merchant Id",
    "threeDSRequestor": {
        "id": "239",
        "name": "EMVCo 3DS Test Requestor",
        "url": "http://www.ul.com/144213bb-f034-410d-84fe-42723ff028b6",
        "threeDSRequestorAuthenticationInd": "01"
    },
    "billingAddress": {
        "line1": "Bill Address Line 1",
        "line2": "Bill Address Line 2",
        "line3": "Bill Address Line 3",
        "city": "Bill City Name",
        "postalCode": "Bill Post Code",
        "state": "USA",
        "country": "840"
    },
    "shippingAddress": {
        "line1": "Bill Address Line 1",
        "line2": "Bill Address Line 2",
        "line3": "Bill Address Line 3",
        "city": "Bill City Name",
        "postalCode": "Bill Post Code",
        "state": "USA",
        "country": "840"
    },
    "email": "[email protected]",
    "cardholderName": "cardholderName",
    "homePhone": {
        "cc": "123",
        "subscriber": "123456789"
    },
    "workPhone": {
        "cc": "123",
        "subscriber": "123456789"
    },
    "mobilePhone": {
        "cc": "123",
        "subscriber": "123456789"
    },
    "merchant": {
        "mcc": "7922",
        "countryCode": "840",
        "name": "Test Merchant"
    },
    "purchase": {
        "amount": "19995",
        "currency": "191",
        "exponent": "2",
        "date": "20190523102223"
    },
    "transType": "01",
    "acctType": "03",
    "acctID": "acct ID",
    "account": {
        "chAccAgeInd": "05",
        "chAccDate": "20170101",
        "chAccChangeInd": "04",
        "chAccChange": "20170101",
        "chAccPwChangeInd": "05",
        "chAccPwChange": "20170101",
        "shipAddressUsageInd": "04",
        "shipAddressUsage": "20170101",
        "txnActivityDay": "1",
        "txnActivityYear": "1",
        "provisionAttemptsDay": "0",
        "nbPurchaseAccount": "1",
        "suspiciousAccActivity": "01",
        "shipNameIndicator": "01",
        "paymentAccInd": "05",
        "paymentAccAge": "20170101"
    },
    "purchaseInstalData": "555",
    "merchantRiskIndicator": {
        "shipIndicator": "01",
        "deliveryTimeframe": "02",
        "deliveryEmailAddress": "[email protected]",
        "reorderItemsInd": "01",
        "preOrderPurchaseInd": "01",
        "preOrderDate": "20300101",
        "giftCardAmount": "1",
        "giftCardCurr": "840",
        "giftCardCount": "01"
    },
    "recurringExpiry": "20170101",
    "recurringFrequency": "3",
    "browser": {
        "ip": "10.135.154.11",
        "language": "en",
        "javaEnabled": true,
        "acceptHeader": "text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8",
        "userAgent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101                 Firefox/47.0",
        "colorDepth": "32",
        "screenHeight": "800",
        "screenWidth": "600",
        "timeZone": "0"
    },
    "notificationURL": "https://3dsrequestor.asseco-see.hr/notification",
    "challengeWindowSize": "02",
    "protocolVersion": "2.1.0"
}

{
    "transStatus": "C",
    "threeDSServerTransID": "050d09cc-f096-4f97-8043-b34889837887",
    "errorCode": null,
    "errorDescription": null,
    "eci": null,
    "authValue": null,
    "dsTransID": null,
    "creq":                 "eyJ0aHJlZURTU2VydmVyVHJhbnNJRCI6IjA1MGQwOWNjLWYwOTYtNGY5Ny04MDQzLWIzNDg4OTgzNzg4NyIsIm1lc3NhZ2VUeXBlIjoiQ1JlcSIsImFjc1RyYW5zSUQiOiIyLjEuMCIsImNoYWxsZW5nZVdpbmRvd1NpemUiOiIwMiIsIm1lc3NhZ2VWZXJzaW9uIjoiMi4xLjAifQ==",
    "acsURL": "http://localhost:1234/dummy-acs-url",
    "cardholderInfo": null,
    "additionalData": {
        "ares": {
            "messageType": "ARes",
            "messageVersion": "2.1.0",
            "threeDSServerTransID": "050d09cc-f096-4f97-8043-b34889837887",
            "acsReferenceNumber": "00001ACS00001",
            "acsURL": "http://localhost:1234/dummy-acs-url",
            "acsTransID": "3cbd0751-24cd-44a2-80a9-c854e7edc3bd",
            "dsReferenceNumber": "MSIGNIA_MOCK_DS",
            "dsTransID": "1ad8dd99-cf08-405a-9607-f4a2414587af",
            "acsChallengeMandated": "Y",
            "acsOperatorID": "mX21mRFudf",
            "authenticationType": "02",
            "authenticationValue": "rsycufapnyqbdzebtdtaweekgida",
            "eci": "xs",
            "transStatus": "C"
        }
    }
}

The full list of possible transaction statuses. Some of the statuses might not be returned in the response of createTransaction response.

Status	Description
Y	Authentication/ Account Verification Successful
N	Not Authenticated /Account Not Verified; Transaction denied
U	Authentication/ Account Verification Could Not Be Performed; Technical or other problem, as indicated in *ARes* or *RReq*
A	Attempts Processing Performed; Not Authenticated/Verified, but proof of attempted authentication/verification is provided
C	Challenge Required; Additional authentication is required using the *CReq/CRes*
R	Authentication/ Account Verification Rejected; Issuer is rejecting authentication/verification and request that authorisation not be attempted.
E	3DSS error; Technical or other problem

Error codes are divided into two categories:

EMVCo 3D Secure protocol error codes
- Returned by DS and part of Erro message in additionalData object
3DSS error codes
- Returned by 3DSS in errorCode field

Value	Error Code	Error Description	Error Detail
101	Message Received Invalid	One of the following: Message is not *AReq, ARes, CReq, CRes, PReq, PRes, RReq, or RRes* Valid Message Type is sent to or from an inappropriate component (such as *AReq* message being sent to the 3DS Server) Message not recognised	One of the following: Invalid Message Type Invalid Message for the receiving component Invalid Formatted Message
102	Message Version Number Not Supported	Message Version Number received is not valid for the receiving component.	All supported Protocol Version Numbers in a comma-delimited list.
201	Required Data Element Missing	A message element defined as required is missing from the message.	Name of required element(s) that was omitted; if more than one element is detected, this is a comma-delimited list. Parent Example: messageType Parent/Child Example: acctInfo.chAccAgeInd
202	Critical Message Extension Not Recognised	Critical message extension not recognised.	ID of critical Message Extension(s) that was not recognised; if more than one extension is detected, this is a comma-delimited list of message identifiers that were not recognised.
203	Format of one or more Data Elements is Invalid according to the Specification	Data element not in the required format or value is invalid as defined in Table A.1 Message Version Number does not match the value set by the 3DS Server in the *AReq* message.	Name of the invalid element(s); if more than one invalid data element is detected, this is a comma-delimited list.
204	Duplicate Data Element	The valid data element presents more than once in the message.	Name of duplicated data element; if more than one duplicate data element is detected, this is a comma-delimited list.
301	Transaction ID Not Recognised	Transaction ID received is not valid for the receiving component.	The Transaction ID received was invalid.
302	Data Decryption Failure	Data could not be decrypted by the receiving system due to technical or other reasons.	Description of the failure.
303	Access Denied, Invalid Endpoint	Access denied, invalid endpoint.	Description of the failure.
304	ISO Code Invalid	ISO code not valid per ISO tables (for either country or currency), or code is one of the excluded values listed in Table A.5.	Name of the invalid element(s); if more than one invalid element is detected this is a comma-delimited list If Challenge Request, Purchase currency and Challenge Request.Purchase exponent form an invalid pair, list both as Error Description.
305	Transaction data not valid	If in response to an *AReq* message: Cardholder Account Number is not in a range belonging to Issuer If in response to a *CReq, and a CReq* message was incorrectly sent, one of the following: *CReq* message was received by the wrong ACS *CReq* message was not sent, based on the values in the *ARes* message *CReq* message with this ACS Transaction ID has already been received and processed	Name of element(s) that caused the ACS to decide that the *AReq* message or *CReq* message was incorrectly sent; if more than one invalid element is detected this is a comma-delimited list.
306	Merchant Category Code (MCC) Not Valid for Payment System	Merchant Category Code (MCC) not valid for Payment System.	For example, Invalid MCC received in the AReq message.
307	Serial Number not Valid	Serial Number not valid.	For example, Invalid Serial number in the PReq/PRes message (e.g., too old, not found).
402	Transaction Timed Out	Transaction timed-out.	For example, Timeout expiry reached for the transaction.
403	Transient System Failure	Transient system failure.	For example, a slowly processing back-end system.
404	Permanent System Failure	Permanent system failure.	For example, a critical database cannot be accessed.
405	System Connection Failure	System connection failure.	For example, the sending component is unable to establish the connection to the receiving component.

Error Code	Error Description	Error Detail	Action
001	Acquirer not defined	The acquirer sent in *createTransaction* request is not defined in *TDSS_ACQUIRER_BIN* table	Add the acquirer and assign it a DS
003	Invalid Response	DS returned an unexpected response	Examine the EMVCo 3DS Erro in *additionalData* to determine the problem
004	Transaction is not defined	A caller attempted to recall a transaction with an ID that is not present in the system	Check the ID being sent
005	Transaction data missing or is not valid	A mandatory data element has not been provided or is in invalid format	Examine the EMVCo 3DS Erro or *errorDescription* and *errorDetail* fields to determine the problem
006	Error generating CReq request	The *CReq* request could not be generated because of the system failure	Examine the other fields describing the error
007	Transaction timed out on DS	The timeout occurred when contacting DS	Check DS URL and if it is available to 3DSS
008	General DS communication failure	All other communication problems while contacting DS	Check DS URL and if it is available to 3DSS
009	Bad request	Data in the request are not by specification	Correct the request data
010	3D Secure Version 2 is not available	Account number (PAN) provided in *createTransaction* request is not participating in 3D Secure 2.0
011	The card range cache is empty	No information about card ranges participating in 3D Secure 2.0 is present in the database	Make sure that 3DSS initiated and downloaded card range cache (PR cache) from DS

If createTransaction method returned transStatus=C, that means that Challenge of the user should be performed.

When the deviceChannel=02 (Browser) i.e. the transaction is initiated through a browser and not through a mobile app the 3DS Requestor should generate a response that contains the returned CReq message that should be submitted to ACS.

Optional data used to accommodate the different methods 3DS Requestor systems handle session information.

If the 3DS Requestor system does not maintain a session for a given authentication session, the 3DS Requestor Session Data field can carry any data the 3DS Requestor needs to continue the session.

If the 3DS Requestor system can associate the final post with the original session without further assistance, the 3DS Requestor Session Data field may be missing.

Because the content of this field varies by 3DS Requestor implementation, the ACS must preserve the content unchanged and without assumptions.

After the authentication has been finished, the ACS will send information about the authentication status to the Notification endpoint located in the 3DS Requestor environment.

The URL of the endpoint is defined by createTransaction parameter notificationUrl.

When 3DS Requestor receives a request to the endpoint defined in notificationUrl it should call the authenticationResult method to get the final authentication results for the transaction.

Method authenticationResult

Method that returns the authentication result for the defined 3DS Server transaction id.
Depending on the type of 3DS transaction the method has an optional parameter cres which can contain a final CRes or Erro message.

Path	/authenticationResult/{3DSS_TRANSACTION_ID}
Supported methods	GET
Consumes	application/json
Produces	application/json

3DSS_TRANSACTION_ID is the identifier of the 3DS Server transaction.

Parameter	Type	Mandatory	Description
cres	String	Optional	Optional argument that contains the Base64url encoded final *CRes* or *Erro* message received by 3DS requestor on the Notification endpoint.

The method returns the status of the authentication and in case of successful authentication the Authentication Value and ECI flag.

Parameter	Type	Mandatory	Description
authenticated	boolean	Mandatory	Indicates that the authentication was successful. true – transaction authenticated false – transaction not authenticated or Erro message received.
transStatus	String	Mandatory	The final transaction status for the transaction. The list of possible transaction statuses is described in the chapter Transaction statuses.
authenticationValue	String	Optional	Authentication value generated by the ACS for the transaction should be only present in case the status is A or Y.
eci	String	Optional	Electronic Commerce Indicator.
dsTransId	String	Optional	DS Transaction Identifier, present if available.

Example request when calling the method with the 3DS Server transaction identifier identifier e.g. authenticationResult/050d09cc-f096-4f97-8043-b34889837887

{
    "authenticated": false,
    "transStatus": "N",
    "authenticationValue": "",
    "eci": "xs",
    "dsTransID": "1ad8dd99-cf08-405a-9607-f4a2414587af"
}

NOTE: After data is fetched the first time, the authentication value will be deleted from the database and an empty string will be returned every time after for the authentication value.

JSON objects

JSON object containing 3DS Requestor info consists of the following data:

id – identifier of the 3DS Requestor. String, maximum 35 characters.
name – 3DS requestor name. String, maximum 40 characters.
url – URL of the 3DS Requestor. String, should be a fully qualified URL, maximum 2048 characters
challengeIndicator – Optional, indicates whether a challenge is requested for this transaction. Possible values:
- 01 = No preference
- 02 = No challenge requested
- 03 = Challenge requested: 3DS Requestor Preference
- 04 = Challenge requested: Mandate
threeDSRequestorAuthenticationInd - Indicates the type of Authentication request. Possible values:
- 01 = Payment transaction
- 02 = Recurring transaction
- 03 = Instalment transaction
- 04 = Add card
- 05 = Maintain card
- 06 = Cardholder verification as part of EMV token ID&V
authInfo - Optional information about how the cardholder authenticated during login to their 3DS Requestor account.
priorAuthInfo - Optional information about a 3DS cardholder authentication that occurred prior to the current transaction.

Example:

“threeDSRequestor” : {
    "id":"az0123456789",
    "name":"Example Requestor name",
    "url":“https://threedsrequestor.adomainname.net“,
    "threeDSRequestorAuthenticationInd": "01”
}

JSON object containing optional information about how the cardholder authenticated during login to their 3DS Requestor account.

threeDSReqAuthData - Data that documents and supports a specific authentication process. In the current version of the specification, this data element is not defined in detail, however the intention is that for each 3DS Requestor Authentication Method, this field carry data that the ACS can use to verify the authentication process. For example, for method:
- 02 - field can carry generic 3DS Requestor authentication information
- 03 - data element can carry information about the provider of the federated ID and related information
- 04 - data element can carry the FIDO attestation data (including the signature). In future versions of the specification, these details are expected to be included.
- Length: maximum 2048 bytes
- JSON Data Type: String
- Value accepted: Any
threeDSReqAuthMethod - Mechanism used by the Cardholder to authenticate to the 3DS Requestor.
- Length: 2 characters
- JSON Data Type: String
- Values accepted:
  - 01 = No 3DS Requestor authentication occurred (i.e. cardholder “logged in” as guest)
  - 02 = Login to the cardholder account at the 3DS Requestor system using 3DS Requestor’s own credentials
  - 03 = Login to the cardholder account at the 3DS Requestor system using federated ID
  - 04 = Login to the cardholder account at the 3DS Requestor system using issuer credentials
  - 05 = Login to the cardholder account at the 3DS Requestor system using third-party authentication
  - 06 = Login to the cardholder account at the 3DS Requestor system using FIDO Authenticator
threeDSReqAuthTimestamp - Date and time in UTC of the cardholder authentication.
- Length: 12 characters
- JSON Data Type: String
- Format accepted:
  - Date format = YYYYMMDDHHMM

JSON object containing optional information about a 3DS cardholder authentication that
occurred prior to the current transaction.

threeDSReqPriorAuthData - Data that documents and supports a specific authentication process.
- In the current version of the specification this data element is not defined in detail, however the intention is that for each 3DS Requestor Authentication Method, this field carry data that the ACS can use to verify the authentication process. In future versions of the specification, these details are expected to be included.
- Length: maximum 2048 bytes
- Format: Any
threeDSReqPriorAuthMethod - Mechanism used by the Cardholder to previously authenticate to the 3DS Requestor.
- Length: 2 characters
- JSON Data Type: String
- Values accepted:
  - 01 = Frictionless authentication occurred by ACS
  - 02 = Cardholder challenge occurred by ACS
  - 03 = AVS verified
  - 04 = Other issuer methods
threeDSReqPriorAuthTimestamp - Date and time in UTC of the prior cardholder authentication.
- Length: 12 characters
- JSON Data Type: String
- Format accepted:
  - Date format = YYYYMMDDHHMM
threeDSReqPriorRef - This data element provides additional information to the ACS to determine the best approach for handing a request.
- Length: 36 characters
- JSON Data Type: String
- Value accepted:
  - This data element contains an ACS Transaction ID for a prior authenticated transaction (for example, the first recurring transaction that was authenticated with the cardholder).

JSON object containing address info used for billingAddress and shippingAddress:

line1 – First line of the street address or equivalent local portion of the address. String, maximum 50 characters.
line2 – Second line of the street address or equivalent local portion of the Cardholder address. String, maximum 50 characters.
line3 – Third line of the street address or equivalent local portion of the address. String, maximum 50 characters.
city - The city of the Cardholder address. String, maximum 50 characters.
postalCode - ZIP or other postal code of the Cardholder address. String, maximum 16 characters.
state - The state or province of the Cardholder address. String, maximal 3 characters. Should be the country subdivision code defined in ISO 3166-2.
country - The country of the Cardholder address. ISO 3166-1 numeric three-digit country code, other than exceptions listed in the table below:

ISO Code	Value Not Permitted for 3-D Secure	Definition
ISO 4217	955	European Composite Unit
ISO 4217	956	European Monetary Unit
ISO 4217	957	European Unit of Account 9
ISO 4217	958	European Unit of Account 17
ISO 4217	959	Gold
ISO 4217	960	I.M.F.
ISO 4217	961	Silver
ISO 4217	962	Platinum
ISO 4217	963	Reserved for testing
ISO 4217	964	Palladium
ISO 4217	999	No currency is involved
ISO 4217	901–999	Reserved by ISO to designate country names not otherwise defined

Example:

“billingAddress” : {
    "line1":"Bill Address Line 1",
    "line2":"Bill Address Line 2",
    "line3":"Bill Address Line 3",
    "city":"Bill City Name",
    "postalCode":"Bill Post Code",
    "state":"CO",
    "country":"840"
}

JSON object defining the phone number. Consists of the following fields:

cc – Country code. String, 1 – 3 characters.
subscriber – Subscriber number. String, maximum 15 characters.

Example:

"mobilePhone": {
    "cc":"123",
    "subscriber":"123456789"
}

Refer to ITU-E.164 for additional information on format and length.

JSON object defining merchant. Consists of the following fields:

mcc - Merchant Category Code, String 4 characters.
countryCode - Merchant Country Code. String 3 characters, ISO 3166-1 numeric three-digit country code.
name - Merchant Name. String, maximal 40 characters.

JSON Object defining Purchase. Consists of the following fields:

amount - Purchase amount in minor units of currency with all punctuation removed. String, maximum 48 characters, e.g. If the purchase amount is USD 123.45, element will contain the value 12345.
currency - ISO 4217 three-digit currency code.
exponent - Minor units of currency as specified in the ISO 4217 currency exponent. 1 character.
date - Date and time of the purchase, expressed in UTC. String, 14 characters
- Formatted: YYYYMMDDHHMMSS

JSON object containing Browser info. Consists of the following fields:

ip - IP address of the browser as returned by the HTTP headers to the 3DS Requestor. String, maximum 45 characters
language - Value representing the browser language as defined in IETF BCP47. String, 1–8 characters
javaEnabled - Boolean that represents the ability of the cardholder browser to execute Java. Accepted values are true or false.
acceptHeader - Exact content of the HTTP accept headers as sent to the 3DS Requestor from the Cardholder’s browser. String, maximum 2048 characters
userAgent - Value representing the bit depth of the color palette for displaying images, in bits per pixel. String, 1-2 characters.
colorDepth - Value representing the bit depth of the color palette for displaying images, in bits per pixel. String, 1-2 characters.
screenHeight - Total height of the Cardholder’s screen in pixels. String, 1–6 characters.
screenWidth - Total width of the cardholder’s screen in pixels. String, 1–6 characters.
timeZone - Time difference between UTC time and the Cardholder browser local time, in minutes. String, 1–5 numerical characters.

JSON object containing the 3RI Indicator.

3RI transaction is a 3-D Secure transaction initiated by the 3DS Requestor for the purpose of confirming an account is still valid. The main use case is recurrent transactions (TV subscriptions, utility bill payments, etc.) where the merchant wants to perform a Non-Payment transaction to verify that a subscription user still has a valid form of payment.

threeRIInd - Indicates the type of 3RI request.
- Values accepted:
  - 01 = Recurring transaction
  - 02 = Instalment transaction
  - 03 = Add card
  - 04 = Maintain card information
  - 05 = Account verification

Example:

"threeRiData": {
    "threeRIInd": "01"
}

Introduction

Service methods

Security

Integration

Fallback to 3DS v1

3DS Method Handling

Transaction flow

Cardholder info

Request timeouts

Methods

Method v2Supported

Method createTransaction

Method authenticationResult

JSON objects

Example:

Example:

Example:

Example:

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