Pre-auth request

An overview of the Pre-auth request message for Android.

• Overview
• Pre-auth request
• Pre-auth response
• Key to card terminal product categories
• Get Support

Overview

👉 The Pre-auth request is used to initiate a pre-authorisation transaction.

The client app must implement a mechanism to send messages using Android intents and URI calls and to receive the result in a custom URI callback.

• Pre-auth request originating from the client app to initiate a request for a new Pre-auth transaction
• Pre-auth response originating from the ‘viva.com | Terminal’ application to return the result of a Pre-auth transaction

Pre-auth request

For a typical Pre-auth request, the client app must provide the following information:

Field	Description	Example	Required	Card terminal support	Character limit	Type
scheme	The Viva custom URL scheme, the host and the version.	'vivapayclient://pay/v1'	✅
merchantKey	The merchant's key. For successful validation, should not be empty. Deprecated: you may pass any value.	'SG23323424EXS3'
appId	The client app ID. For successful validation, should not be empty.	'com.example.myapp'	✅
action	Pre-auth transaction. For successful validation, should not be empty.	'pre_auth'	✅
clientTransactionId	A unique transaction ID transmitted to the host for storage with the transaction. Note that this value will be provided in the Merchant Reference field provided in the sales export response.	'12345678901234567890123456789012'			2048
amount	Amount in cents without any decimal digits. This value must not be empty and must be an integer larger than zero.	'1200' = 12 euro	✅		2048	decimal
callback	The URI callback that will handle the result. For successful validation, should not be empty.	'mycallbackscheme://result'	✅
show_receipt	A flag indicating if the receipt and transaction result will be shown. If true both transaction result and receipt will be shown. If false receipt will not be shown and result will be shown if show_transaction_result is true.	'true'				boolean
show_transaction_result	A flag indicating whether transaction result will be shown.	'true'				boolean
show_rating	A flag indicating if the rating flow will be shown.	'true'				boolean
aadeProviderId [*]	Unique Number to identify specific Provider (ΥΠΑΗΕΣ): VivaDemo - ‘999’ SoftOne - ‘101’ EnterSoft - ‘102’ Impact - ‘103’ Epsilon Net - ‘104’ Novus Conceptus - ‘105’ Cloud Services IKE - ‘106’ Primer Software - ‘107’ ILYDA = ‘108’ Prosvasis = ‘109’ MAT = ‘110’ Simply = ‘111’ Kappa = ‘112’ SBZ = ‘113’ OneSys = ‘114’ ORIAN = ‘115’ TESAE = ‘116’ Karpodinis = ‘117’ Cloud T = ‘118’ Πάροχος Λύσεων Πληροφορικής Α.Ε. = ‘119’	'999'			3	Numeric
aadeProviderSignatureData [*]	The unencrypted signature that includes the fields below with semicolon as a delimiter “;”: Receipt UID MARK (Unique ID provided by AADE - commonly null as this provider after the end of the transaction) Date and time of the Signature Amount to be paid Sum Amount without TAX VAT percentage Sum Amount with TAX TID	AD33729F4ED749928AAFA00B90EE4EA91551BAC1;;20231204080313;1051;10000;2400;12400;POS_1			200	Alphanumeric
aadeProviderSignature [*]	The fields of providerSignatureFields encrypted using a public key and the Elliptic Curve Digital Signature Algorithm (ECDSA): Algorithm: ECDSA Curve: NISTP256 HASH: SHA256 The signature is sent to POS in base64 format	o0094r3Yk3KTqASLkW3evlDsnIg/ZAdUUf6UCXDtjqpI/dquzAT4WNX3yzS/GLciVNbT75H4pj8hLOV0EpHtzw=="

[*] These parameters are only applicable in Greece

The above parameters must be used to create a URI call. Please see the below example:

Intent payIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(
                        "vivapayclient://pay/v1"
                                + "?merchantKey="MY_MERCHANT_KEY""
                                + "&appId=com.example.myapp"
                                + "&action=pre_auth"
                                + "&clientTransactionId=1234567801234"
                                + "&amount=1200"
                                + "&show_receipt="+true
                                + "&show_transaction_result="+true
                                + "&show_rating="+true
                                + "&aadeProviderId=999"
                                + "&aadeProviderSignatureData=AD33729F4ED749928AAFA00B90EE4EA91551BAC1;;20231204080313;1051;10000;2400;12400;POS_1"
                                + "&aadeProviderSignature=o0094r3Yk3KTqASLkW3evlDsnIg/ZAdUUf6UCXDtjqpI/dquzAT4WNX3yzS/GLciVNbT75H4pj8hLOV0EpHtzw=="
                                + "&callback=mycallbackscheme://result"));

payIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

payIntent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
                startActivity(payIntent);

Pre-auth response

After executing a Pre-auth transaction the ‘viva.com | Terminal’ application responds with a Pre-auth response result to indicate if the transaction has been approved or not.

The result is received as a URI in the callback activity intent:

Uri result = getIntent().getData()`

The table below summarises the contents of an approved response.

Field	Description	Example	Card terminal support
callback	The URI callback that will handle the result.	'mycallbackscheme://result'
status	The status of the transaction.	'success'
message	A string containing information about the transaction status.	'Transaction successful'
action	Pre-auth transaction.	'pre_auth'
clientTransactionId	The client transaction ID.	'12345678901234567890123456789012'
amount	The amount in cents without any decimal digits. If action is cancel and amount is not empty must be integer and bigger than zero. (Used in successful and declined receipts)	'1200' = 12 euro
verificationMethod	The verification method used.	'CHIP-PIN'
rrn	The Retrieval Reference Number of the transaction RRN. (Used in successful and declined receipts)	'123456833121'
cardType	The card type.	'VISA'
accountNumber	The card number masked. Note that only the 6 first and the 4 last digits are provided. All other digits are masked with stars. (Used in successful and declined receipts)	'479275\*\*\*\*\*\*9999'
referenceNumber	A 6-digit number indicating the transaction's STAN number.	'833121'
authorisationCode	A 6-digit number indicating the transaction's Authorisation code provided by the host.	'690882'
tid	A 12 character string indicating the terminal's TID number.	' 16016684'
orderCode	The order code.	' 9256110059000200'
shortOrderCode	10-digit integer.	'1234567890'
transactionDate	The transaction date in ISO 8601 format. (Used in successful and declined receipts)	'2019-09-13T12:14:19.8703452+03:00'
transactionId	A unique identifier for the transaction.	'a78e045c-49c3-4743-9071-f1e0ed71810c'
aid	A string indicating the AID of the card. (Used in successful receipts)	'A000000003101001'
vatNumber	The VAT number of merchant. (if print VAT is enabled in the 'viva.com | Terminal' application settings) (Used in successful and declined receipts)	'123412341'
address	The address of merchant (if print address is enabled in the 'viva.com | Terminal' application settings) (Used in successful receipts)	‘Main St 123, 12312 Anytown’
businessDescription	Merchant’s Business/Trade/Store name (depending on what option is selected in the 'viva.com | Terminal' application settings), (Used in successful receipts)	'Wonka Industries'
printLogoOnMerchantReceipt	A boolean indicating weather the VivaWallet logo should be printed on merchant receipt. (Used in successful receipts)	'false'
merchantReceiptPAN	This field contains the value of the PAN (and additional clipping) that should be printed in merchant receipt. If is empty, then apply the default clipping. (Used in successful receipts)	'629914XXXXXXXXX6770'
cardholderReceiptPAN	This field contains the value of the PAN (and additional clipping) that should be printed in customer receipt. If is empty, then apply the default clipping.	'629914XXXXXXXXX6770'
transactionReceiptAcquirerZone	If it is not empty then this value should be printed at the end of the customer receipt. (Used in successful receipts)	'qwerty123456'
cardholderReceiptText	If is not empty then this value should be printed at the end of the customer receipt. (Used in successful receipts)	'qwerty123456'
merchantReceiptText	If is not empty then this value should be printed at the end of the customer receipt. (Used in successful receipts)	'qwerty123456'
cardholderName	Name of the cardholder. (Used in successful receipts)	'JOHN DOE'
cardExpirationDate	Expiration date of the card (YYMM). (Used in successful receipts)	'2212'
cardholderNameExpirationDateFlags	Each char may be 0 (false) or 1 (true) and indicates if the cardholder name and the expiration date should be printed on the merchant/cardholder receipts) 1st char: if 1 then the Cardholder Name should be printed in the merchant's receipt. If 0, then it should not. 2nd char: if 1 then the Cardholder Name should be printed in the cardholder's receipt. If 0, then it should not. 3rd char: if 1 then the Expiration Date should be printed in the merchant's receipt. If 0, then it should not. 4rd char: if 1 then the Expiration Date should be printed in the cardholder's receipt. If 0, then it should not. (Used in successful receipts)	'1010'
needsSignature	A boolean indicating if the receipt needs a signature section. (Used in successful receipts)	false
addQRCode	A boolean indicating if the order code should be printed as a QR. (Used in successful receipts)	false
terminalSerialNumber	The serial number of the terminal. (Used in successful receipts)	“1234567891“
currency	The currency of the transaction. (Used in successful receipts)	“EUR“
errorText	Text to print on the receipt stating the error description and the error ccode. (Used in declined receipts)	“Transaction failed - Z-3“
applicationVersion	The version off the application. (Used in declined receipts)	'v3.7.0(1956)'
oldBalance	The old balance of the cardholder. (Used in successful receipts)	'200' = 2 euro
newBalance	The new balance of the cardholder. (Used in successful receipts)	'200' = 2 euro
entryMode	Indicates the method used for PAN entry to initiate a transaction. You may find all the POS Entry Modes here.	'07'
aadeTransactionId	An AADE-specific transaction ID. Format: Acquirer Unique code + RRN + Authorization code. Example: ‘116’ + ‘123456833121’ + ‘690882’ = '116123456833121690882'	'116123456833121690882'

A Pre-auth response result for an approved transaction looks as follows:

A sale response for a successful pre-auth transaction using AADE parameters looks as follows:

Key to card terminal product categories

To understand the icons used on the above tables, see the below table.

Product category	Terminal models	Icon
Android Card Terminals	Android Card Terminal Ethernet, Android Card Terminal 4G, Mobile Card Terminal Plus, Mobile Card Terminal.
'viva.com | Terminal' application for Android	Mini Card Reader, Pocket Card Terminal connected via Bluetooth or USB to the 'viva.com | Terminal' application for Android.
Linux Card Terminals	Countertop, IM20, S900, S800, D200.

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