Cancel/Refund request

An overview of the Cancel/Refund request message for iOS.

Our ‘ | Terminal’ application (tap-on-phone) supports Apple Tap to Pay in the UK, the Netherlands & France


๐Ÿ‘‰ The Cancel/Refund request is used to Cancel/Void a payment which occurred within the same calendar day or to Refund a successful payment - either partially or fully. See below for further details

Cancellations/Voids: You can cancel/void (reverse) a payment made on the same calendar day. This means you are able to ‘undo’ a payment you have made, ensuring no money is charged from the customer’s card. In such cases, the cancellation appears in the customer’s account instantly.

Refunds: This is available for transactions which are cleared and ready to be settled in your account. You are able to refund the entire payment amount or just a portion of it (i.e. a ‘partial refund’). The time it takes for the refund to appear in the customer’s account can vary depending on the customer’s bank or card issuer. Please note: even if you trigger a same-day partial refund, the refund will be processed after clearance of the original transaction.

The Cancel/Refund request is relevant for both Sale and Pre-auth transactions

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

This request will only produce a success response in Viva’s Production environment ( | Terminal App). Testing this functionality in the | Terminal Demo App will result in an UNEXPECTED (-999) error or display a blank transactions list

Cancel/Refund requestย 

For a typical Cancel/Refund request, the client app must provide the following information:

Field Description Example Required
scheme The Viva's 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.
appId The client app id. 'com.example.myapp'
action Cancel transaction. 'cancel'
amount The amount to refund in cents, without any decimal digits. If no amount provided, a full refund will be performed. '600' = 6 euro (optional)
referenceNumber The STAN number of the transaction to be cancelled. '833121' (optional)
orderCode The order code of the transaction to be cancelled. When provided, it will act as a search parameter and if a transaction with the same order code is found, the cancel/refund will take place. If a reference number has also been provided, only the order code will be taken into consideration. '109113919500020' (optional)
shortOrderCode Same as order code but in shorter length, although when provided, it will be reconstructed into a full length order code based on the terminal used. If the original sale has been made in a different terminal, the transaction wonโ€™t be retrieved and therefore cancelled. If both orderCode and shortOrderCode are provided, only the shortOrderCode will be taken into consideration. '1091139195โ€™ (optional)
txnDateFrom Specifies the minimum date on which the transaction search will take place. if txnDateFrom is provided and txnDateTo is not, the current date will be assigned as the value of txnDateTo. The date should be in ISO 8601 format. '2021-03-29T00:00:00.000+0300' (required if txnDateTo has been set, otherwise optional)
txnDateTo Specifies the maximum date on which the transaction search will take place. if txnDateFrom has not been provided but a txnDateTo has, an error is returned. The date should be in ISO 8601 format. '2021-03-30T00:00:00.000+0300' (optional)
show_receipt Option to show the receipt screen, before returning to the InterApp, after performing a refund on | Terminal App. 'true'
show_transaction_result Option to show the transaction result screen, before returning to the InterApp, after performing a refund on | Terminal App. If show_receipt is set to 'trueโ€™ this value will be neglected, therefore the transaction result screen will be shown. 'false'
protocol The protocol used (internal use only) Always pass this value: int_default
callback Your custom URI callback that will handle the result. 'interapp-callback'
aadeProviderId [*] Unique Number to identify specific Provider (ฮฅฮ ฮ‘ฮ—ฮ•ฮฃ):

  • VivaDemo - โ€˜999โ€™
  • SoftOne - โ€˜101โ€™
  • EnterSoft - โ€˜102โ€™
  • Impact - โ€˜103โ€™
  • Epsilon Net - โ€˜104โ€™
  • Novus Conceptus - โ€˜105โ€™
  • Cloud Services IKE - โ€˜106โ€™
  • Primer Software - โ€˜107โ€™
  • ILYDA = โ€˜108โ€™
  • Prosvasis = โ€˜109โ€™
  • MAT = โ€˜110โ€™
  • Simply = โ€˜111โ€™
  • Kappa = โ€˜112โ€™
  • SBZ = โ€˜113โ€™
  • OneSys = โ€˜114โ€™
  • ORIAN = โ€˜115โ€™
  • TESAE = โ€˜116โ€™
  • Karpodinis = โ€˜117โ€™
  • Cloud T = โ€˜118โ€™
  • ฮ ฮฌฯฮฟฯ‡ฮฟฯ‚ ฮ›ฯฯƒฮตฯ‰ฮฝ ฮ ฮปฮทฯฮฟฯ†ฮฟฯฮนฮบฮฎฯ‚ ฮ‘.ฮ•. = โ€˜119โ€™
  • '999'
    Please note that this parameter apply only for Greek merchants.
    aadeProviderSignatureData [*] The unencrypted signature that includes the fields below with semicolon as a delimiter โ€œ;โ€:

  • 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
    Please note that this parameter apply only for Greek merchants.
    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=="
    Please note that this parameter apply only for Greek merchants.

    [*] These parameters are only applicable in Greece.

    The above information elements must create a URI call, i.e.

    func createCancelRequest(refundAmount: Decimal?, reference: String?, orderCode: String?, shortOrderCode: String?, dateFrom: String?, dateTo: String?) -> String {
            // construct cancel action url
            var cancelActionURL = Constants.cancelUrlString // vivapayclient://pay/v1?callback=interapp-callback&merchantKey=SG23323424EXS3&appId=com.vivawallet.InterAppDemo&action=cancel
            if let amount = refundAmount {
                cancelActionURL += "&amount=\(((amount * 100) as NSDecimalNumber).intValue)" // The amount in cents without any decimal digits.
            if let unwrappedReference = reference, unwrappedReference != "" {
                cancelActionURL += "&referenceNumber=\(unwrappedReference)" // transaction reference number
            if let unwrappedOrderCode = orderCode, unwrappedOrderCode != ""  {
                cancelActionURL += "&orderCode=\(unwrappedOrderCode)" // transaction order code
            if let unwrappedShortOrderCode = shortOrderCode, unwrappedShortOrderCode != ""  {
                cancelActionURL += "&shortOrderCode=\(unwrappedShortOrderCode)" // transaction short Order Code
            if let dateFrom = dateFrom {
                cancelActionURL += "&txnDateFrom=\(dateFrom)"
            if let dateTo = dateTo {
                cancelActionURL += "&txnDateTo=\(dateTo)"
            let showReceipt = UserDefaults.standard.value(forKey: "show_receipt") as? Bool ?? true
            cancelActionURL += "&show_receipt=\(showReceipt)"
            let showResult = UserDefaults.standard.value(forKey: "show_transaction_result") as? Bool ?? true
            cancelActionURL += "&show_transaction_result=\(showResult)"
            return cancelActionURL
        //USE LIKE THIS
            let canceRequestStringURL: String = createCancelRequest(refundAmount: 5, reference: nil, orderCode: nil, shortOrderCode: "1091139195",, dateFrom: "2021-03-29T00:00:00.000+0300", dateTo: nil)
            (UIApplication.shared.delegate as? AppDelegate)?.performInterAppRequest(request: canceRequestStringURL)

    The above information elements must create a URI call. i.e.

    Request example

    Request sample:vivapayclient://pay/v1?callback=interapp-callback&merchantKey=SG23323424EXS3&appId=com.vivawallet.InterAppDemo&action=cancel&amount=600&shortOrderCode=1091139195&txnDateFrom=2021-03-29T00:00:00.000+0300&show_receipt=false

    Request sample for merchants registered in Greece(including AADE parameters):vivapayclient://pay/v1?callback=interapp-callback&merchantKey=SG23323424EXS3&appId=com.vivawallet.InterAppDemo&action=cancel&amount=600&shortOrderCode=1091139195&txnDateFrom=2021-03-29T00:00:00.000+0300&show_receipt=false&aadeProviderId=999&aadeProviderSignatureData=AD33729F4ED749928AAFA00B90EE4EA91551BAC1;;20231204080313;1051;10000;2400;12400;POS_1&aadeProviderSignature=o0094r3Yk3KTqASLkW3evlDsnIg/ZAdUUf6UCXDtjqpI/dquzAT4WNX3yzS/GLciVNbT75H4pj8hLOV0EpHtzw==

    Cancel/Refund response

    After executing a Cancel/Refund request, the | Terminal App responds with a response result to indicate if the transaction has been approved or not.

    The result is received as a URI in the callback activity.

    The table below summarises the contents of an approved response:

    Field Description Example
    callback The URI callback that will handle the result. 'interapp-callback://result'
    status The status of the transaction. 'success'
    message A string containing information about the transaction status. 'Transaction successful'
    action Cancel transaction. 'cancel'
    amount The amount in cents without any decimal digits. '1200' = 12 euro
    cardType The card type. 'Debit Mastercard'
    accountNumber The card number. Note that only the 6 first and the 4 last digits are provided. All other digits are masked with stars. '537489******1831'
    orderCode The order code. '1091159196000136'
    shortOrderCode The order code in short format. '1091159196'
    tid A 12 character string indicating the terminal's TID number. '16016684'
    transactionDate The transaction date in ISO 8601 format. '2021-03-30T00:00:00.000+0300'
    transactionId A unique identifier for the transaction. 'a78e045c-49c3-4743-9071-f1e0ed71810c'
    aadeTransactionId An AADE-specific transaction ID.

    Format: Acquirer Unique code + RRN + Authorization code.

    Example: โ€˜116โ€™ + โ€˜123456833121โ€™ + โ€˜690882โ€™ = '116123456833121690882'


    A Cancel/Refund response result for an approved transaction looks as follows:

    A Cancel/Refund response result for an approved transaction using AADE parameters looks as follows looks as follows:

    It is expected that certain transactions will fail for various reasons. A Cancel response result for a failed transaction looks as follows:

    The structure of the message is the same as in the case of an approved transaction.

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