Pre-auth request

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

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.

If you wish to activate preAuth functionality in your terminals, please contact your Viva Wallet sales representative. Alternatively, you can contact us directly via our live chat facility, by simply clicking on the live chat icon in the bottom right-hand corner of this page.

Pre-auth request

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

Field Description Example Required Card terminal support
scheme The Viva custom URL scheme, the host and the version. 'vivapayclient://pay/v1' Android Card TerminalsViva Wallet POS app for Android
merchantKey The merchant's key. For successful validation, should not be empty.
Deprecated: you may pass any value.
'SG23323424EXS3' Android Card TerminalsViva Wallet POS app for Android
appId The client app ID. For successful validation, should not be empty. 'com.example.myapp' Android Card TerminalsViva Wallet POS app for Android
action Pre-auth transaction. For successful validation, should not be empty. 'pre_auth' Android Card TerminalsViva Wallet POS app for Android
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' Android Card TerminalsViva Wallet POS app for Android
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 Android Card TerminalsViva Wallet POS app for Android
callback The URI callback that will handle the result. For successful validation, should not be empty. 'mycallbackscheme://result' Android Card TerminalsViva Wallet POS app for Android
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' Viva Wallet POS app for Android
show_transaction_result A flag indicating whether transaction result will be shown. 'true' Viva Wallet POS app for Android
show_rating A flag indicating if the rating flow will be shown. 'true' Viva Wallet POS app for Android

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
                                + "&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 card terminal app 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' Android Card TerminalsViva Wallet POS app for Android
status The status of the transaction. 'success' Android Card TerminalsViva Wallet POS app for Android
message A string containing information about the transaction status. 'Transaction successful' Android Card TerminalsViva Wallet POS app for Android
action Pre-auth transaction. 'pre_auth' Android Card TerminalsViva Wallet POS app for Android
clientTransactionId The client transaction ID. '12345678901234567890123456789012' Android Card TerminalsViva Wallet POS app for Android
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 Android Card TerminalsViva Wallet POS app for Android
verificationMethod The verification method used. 'CHIP-PIN' Android Card TerminalsViva Wallet POS app for Android
rrn The Retrieval Reference Number of the transaction RRN.
(Used in successful and declined receipts)
'123456833121' Android Card TerminalsViva Wallet POS app for Android
cardType The card type. 'VISA' Android Card TerminalsViva Wallet POS app for Android
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' Android Card TerminalsViva Wallet POS app for Android
referenceNumber A 6-digit number indicating the transaction's STAN number. '833121' Android Card TerminalsViva Wallet POS app for Android
authorisationCode A 6-digit number indicating the transaction's Authorisation code provided by the host. '690882' Android Card TerminalsViva Wallet POS app for Android
tid A 12 character string indicating the terminal's TID number. ' 16016684' Android Card TerminalsViva Wallet POS app for Android
orderCode The order code. ' 9256110059000200' Android Card TerminalsViva Wallet POS app for Android
shortOrderCode 10-digit integer. '1234567890' Android Card TerminalsViva Wallet POS app for Android
transactionDate The transaction date in ISO 8601 format.
(Used in successful and declined receipts)
'2019-09-13T12:14:19.8703452+03:00' Android Card TerminalsViva Wallet POS app for Android
transactionId A unique identifier for the transaction. 'a78e045c-49c3-4743-9071-f1e0ed71810c' Android Card TerminalsViva Wallet POS app for Android
aid A string indicating the AID of the card.
(Used in successful receipts)
'A000000003101001' Android Card Terminals
vatNumber The VAT number of merchant.
(if print VAT is enabled in the Viva POS app settings)
(Used in successful and declined receipts)
'123412341' Android Card Terminals
address The address of merchant
(if print address is enabled in the Viva POS app settings)
(Used in successful receipts)
‘Main St 123, 12312 Anytown’ Android Card Terminals
businessDescription Merchant’s Business/Trade/Store name (depending on what option is selected in the Viva POS app settings),
(Used in successful receipts)
'Wonka Industries' Android Card Terminals
printLogoOnMerchantReceipt A boolean indicating weather the VivaWallet logo should be printed on merchant receipt.
(Used in successful receipts)
'false' Android Card Terminals
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' Android Card Terminals
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' Android Card Terminals
transactionReceiptAcquirerZone If it is not empty then this value should be printed at the end of the customer receipt.
(Used in successful receipts)
'qwerty123456' Android Card Terminals
cardholderReceiptText If is not empty then this value should be printed at the end of the customer receipt.
(Used in successful receipts)
'qwerty123456' Android Card Terminals
merchantReceiptText If is not empty then this value should be printed at the end of the customer receipt.
(Used in successful receipts)
'qwerty123456' Android Card Terminals
cardholderName Name of the cardholder.
(Used in successful receipts)
'JOHN DOE' Android Card Terminals
cardExpirationDate Expiration date of the card (YYMM).
(Used in successful receipts)
'2212' Android Card Terminals
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' Android Card Terminals
needsSignature A boolean indicating if the receipt needs a signature section.
(Used in successful receipts)
false Android Card Terminals
addQRCode A boolean indicating if the order code should be printed as a QR.
(Used in successful receipts)
false Android Card Terminals
terminalSerialNumber The serial number of the terminal.
(Used in successful receipts)
“1234567891“ Android Card Terminals
currency The currency of the transaction.
(Used in successful receipts)
“EUR“ Android Card Terminals
errorText Text to print on the receipt stating the error description and the error ccode.
(Used in declined receipts)
“Transaction failed - Z-3“ Android Card Terminals
applicationVersion The version off the application.
(Used in declined receipts)
'v3.7.0(1956)' Android Card Terminals
oldBalance The old balance of the cardholder.
(Used in successful receipts)
'200' = 2 euro Android Card Terminals
newBalance The new balance of the cardholder.
(Used in successful receipts)
'200' = 2 euro Android Card Terminals
entryMode The POS entry mode.
(Used in successful receipts)
'07' Android Card Terminals

A Pre-auth response result for an approved transaction 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. Android Card Terminals
Viva Wallet POS app for Android Mini Card Reader, Pocket Card Terminal connected via Bluetooth or USB to the Viva Wallet POS app for Android. Android Card Terminals
Linux Card Terminals Countertop, IM20, S900, S800, D200. Linux Card Terminals

Get Support

If you would like to integrate with Viva Wallet, or if you have any queries about our products and solutions, please see our Get Support page to see how we can help!