public static string BuildQRCodeValue(long amount, string accountToPresent, string trackingId)
{
try
{
QRDEList listIn = new QRDEList();
listIn.AddToList(QRDE.Create(EMVQRTagsEnum.PAYLOAD_FORMAT_INDICATOR_00, "01"));
listIn.AddToList(QRDE.Create(EMVQRTagsEnum.POINT_OF_INITIATION_METHOD_01, "12"));
QRDE _26 = QRDE.Create(EMVQRTagsEnum.MERCHANT_ACCOUNT_INFORMATION_TEMPLATE_26);
QRDE.Create(EMVQRTagsEnum.GLOBALLY_UNIQUE_IDENTIFIER_00, accountToPresent, _26);
EMVQRTagsEnum.CreateUnknown(TagId._05, trackingId, _26); //tracking id
listIn.AddToList(_26);
//listIn.AddToList(QRDE.Create(EMVQRTagsEnum.MERCHANT_CATEGORY_CODE_52, "4111"));
//listIn.AddToList(QRDE.Create(EMVQRTagsEnum.COUNTRY_CODE_58, "CN"));
listIn.AddToList(QRDE.Create(EMVQRTagsEnum.TRANSACTION_AMOUNT_54, Convert.ToString(amount)));
//listIn.AddToList(QRDE.Create(EMVQRTagsEnum.TRANSACTION_CURRENCY_53, "156"));
listIn.AddToList(QRDE.Create(EMVQRTagsEnum.CRC_63, "0000"));
return(listIn.Serialize());
}
catch (Exception ex)
{
Logger.Log(ex.Message);
return(string.Empty);
}
}
public void StartTransactionRequest(ref TransactionRequest tr, string barcodeValue)
{
//unpack barcode
QRDEList listOut = new QRDEList();
listOut.Deserialize(barcodeValue);
int depth = 0;
Logger.Log("Barcode Scanned:");
Logger.Log(listOut.ToPrintString(ref depth));
long amount = Convert.ToInt64(listOut.Get(EMVQRTagsEnum.TRANSACTION_AMOUNT_54.Tag).Value);
long amountOther = 0;
tr = new TransactionRequest(amount + amountOther, amountOther, TransactionTypeEnum.PurchaseGoodsAndServices);
EMVTerminalProcessingOutcome processingOutcome = new EMVTerminalProcessingOutcome()
{
NextProcessState = EMVTerminalPreProcessingStateEnum.EndProcess,
UIRequestOnOutcomePresent = false,
UIRequestOnRestartPresent = false,
QRData = listOut,
};
OnProcessCompleted(processingOutcome);
}
public void StartTransactionRequest(TransactionRequest tr, string barcodeValue)
{
//add tracking id
QRDEList listOut = new QRDEList();
listOut.Deserialize(barcodeValue);
int depth = 0;
Logger.Log("Barcode Presented:");
Logger.Log(listOut.ToPrintString(ref depth));
EMVTerminalProcessingOutcome processingOutcome = new EMVTerminalProcessingOutcome()
{
NextProcessState = EMVTerminalPreProcessingStateEnum.EndProcess,
UIRequestOnOutcomePresent = false,
UIRequestOnRestartPresent = false,
QRData = listOut,
};
OnProcessCompleted(processingOutcome);
}
private async void EmvTxCtl_TxCompleted(object sender, EventArgs e)
{
try
{
TransactionType transactionType;
string fromAccountNumber = "";
string cardSerialNumberFrom = "";
string toAccountNumber = "";
string cardSerialNumberTo = "";
if ((e as TxCompletedEventArgs).EMV_Data.IsPresent())
{
if ((e as TxCompletedEventArgs).TxResult == TxResult.Approved || (e as TxCompletedEventArgs).TxResult == TxResult.ContactlessOnline)
{
TLV data = (e as TxCompletedEventArgs).EMV_Data.Get();
byte[] panBCD;
TLV _5A = data.Children.Get(EMVTagsEnum.APPLICATION_PRIMARY_ACCOUNT_NUMBER_PAN_5A_KRN.Tag);
if (_5A != null)
{
panBCD = _5A.Value;
}
else
{
TLV _57 = data.Children.Get(EMVTagsEnum.TRACK_2_EQUIVALENT_DATA_57_KRN.Tag);
if (_57 == null)
{
throw new Exception("No PAN found");
}
String panString = Formatting.ByteArrayToHexString(_57.Value);
panBCD = Formatting.StringToBcd(panString.Split('D')[0], false);
}
TLV _9F02 = data.Children.Get(EMVTagsEnum.AMOUNT_AUTHORISED_NUMERIC_9F02_KRN.Tag);
if (_9F02 == null)
{
throw new Exception("No Amount found");
}
long amount = Formatting.BcdToLong(_9F02.Value);
switch (flowType)
{
case FlowType.SendMoneyFromCardToApp:
toAccountNumber = SessionSingleton.Account.AccountNumberId;
cardSerialNumberFrom = Formatting.BcdToString(panBCD);
transactionType = TransactionType.SendMoneyFromCardToApp;
break;
case FlowType.SendMoneyFromAppToCard:
fromAccountNumber = SessionSingleton.Account.AccountNumberId;
cardSerialNumberTo = Formatting.BcdToString(panBCD);
transactionType = TransactionType.SendMoneyFromAppToCard;
break;
default:
throw new Exception("Unknown flow type:" + flowType);
}
try
{
await CallTransactByCardWebService(fromAccountNumber, toAccountNumber, cardSerialNumberFrom, cardSerialNumberTo, amount, transactionType, data);
Device.BeginInvokeOnMainThread(() =>
{
lblTransactSummary.Text = "Transaction Completed Succesfully";
UpdateView(ViewState.StepSummary);
});
}
catch
{
Device.BeginInvokeOnMainThread(() =>
{
lblTransactSummary.Text = "Declined, could not go online.";
UpdateView(ViewState.StepSummary);
});
}
}
else
{
Device.BeginInvokeOnMainThread(() =>
{
lblTransactSummary.Text = (e as TxCompletedEventArgs).TxResult.ToString();
UpdateView(ViewState.StepSummary);
});
}
}
else if ((e as TxCompletedEventArgs).QR_Data.IsPresent())
{
QRDEList data = (e as TxCompletedEventArgs).QR_Data.Get();
QRDE _26 = data.Get(EMVQRTagsEnum.MERCHANT_ACCOUNT_INFORMATION_TEMPLATE_26.Tag);
QRDE _54 = data.Get(EMVQRTagsEnum.TRANSACTION_AMOUNT_54.Tag);
QRDE gui = _26.Children.Get(EMVQRTagsEnum.GLOBALLY_UNIQUE_IDENTIFIER_00.Tag);
QRDE tracking = _26.Children.Get(TagId._05);
long amount = Convert.ToInt64(_54.Value);
if ((e as TxCompletedEventArgs).TxResult == TxResult.QRCodeScanned)
{
switch (flowType)
{
case FlowType.SendMoneyFromCardToApp:
throw new Exception("Invalid flow type for Scanned QR code");
case FlowType.SendMoneyFromAppToCard:
fromAccountNumber = SessionSingleton.Account.AccountNumberId;
toAccountNumber = gui.Value;
transactionType = TransactionType.SendMoneyFromAppToCard;
break;
default:
throw new Exception("Unknown flow type:" + flowType);
}
try
{
await CallTransactByQRCodeWebService(fromAccountNumber, toAccountNumber, amount, tracking.Value);
Device.BeginInvokeOnMainThread(() =>
{
lblTransactSummary.Text = "Transaction Completed Succesfully";
UpdateView(ViewState.StepSummary);
});
}
catch (Exception ex)
{
Device.BeginInvokeOnMainThread(() =>
{
lblTransactSummary.Text = "Declined, could not go online.";
UpdateView(ViewState.StepSummary);
});
}
}
else if ((e as TxCompletedEventArgs).TxResult == TxResult.QRCodeToPoll)
{
switch (flowType)
{
case FlowType.SendMoneyFromCardToApp:
break;
case FlowType.SendMoneyFromAppToCard:
throw new Exception("Invalid flow type for QR code");
default:
throw new Exception("Unknown flow type:" + flowType);
}
try
{
bool success = await CallTransactGetStateWebService(tracking.Value);
//bool success = await CallTransactGetStateWebService("929fa290b20647988f72f2ca762bc3e7");
if (success)
{
Device.BeginInvokeOnMainThread(() =>
{
lblTransactSummary.Text = "Transaction Approved";
UpdateView(ViewState.StepSummary);
});
}
else
{
Device.BeginInvokeOnMainThread(() =>
{
App.Current.MainPage.DisplayAlert("Info", "Transaction not found, try again if you believe the transaction was approved", "OK");
});
}
}
catch
{
Device.BeginInvokeOnMainThread(() =>
{
App.Current.MainPage.DisplayAlert("Info", "Unknown, there is no connectivity to the server, try again if you believe the tx was approved", "OK");
});
}
}
else
{
Device.BeginInvokeOnMainThread(() =>
{
lblTransactSummary.Text = (e as TxCompletedEventArgs).TxResult.ToString();
UpdateView(ViewState.StepSummary);
});
}
}
else
{
Device.BeginInvokeOnMainThread(() =>
{
lblTransactSummary.Text = "Declined";
UpdateView(ViewState.StepSummary);
});
}
}
catch (Exception ex)
{
Device.BeginInvokeOnMainThread(() =>
{
lblTransactSummary.Text = ex.Message;
UpdateView(ViewState.StepSummary);
});
}
}
private void ProcessCompletion(TerminalProcessingOutcomeEventArgs e, InterFaceType interFaceType)
{
TLV data = null;
TLV discretionaryData = null;
QRDEList qrData = null;
try
{
long?amount = Convert.ToInt64(totalAmount.Total);
TerminalProcessingOutcome tpo = e.TerminalProcessingOutcome;
if (tpo == null)//error occurred, error displayed via Ta_ExceptionOccured
{
return;
}
if (tpo is EMVTerminalProcessingOutcome)
{
data = ((EMVTerminalProcessingOutcome)tpo).DataRecord;
discretionaryData = ((EMVTerminalProcessingOutcome)tpo).DiscretionaryData;
qrData = ((EMVTerminalProcessingOutcome)tpo).QRData;
if (data != null) //error
{
SetStatusLabel(new UIMessageEventArgs(MessageIdentifiersEnum.RemoveCard, StatusEnum.EndProcessing), interFaceType);
//may be a contactless magstripe transaction
if (data.Children.Get(EMVTagsEnum.CRYPTOGRAM_INFORMATION_DATA_9F27_KRN.Tag) == null)
{
txResult = TxResult.ContactlessMagOnline;
}
else
{
if (((data.Children.Get(EMVTagsEnum.CRYPTOGRAM_INFORMATION_DATA_9F27_KRN.Tag).Value[0] & 0xC0) >> 6) == (byte)ACTypeEnum.ARQC)
{
if (interFaceType == InterFaceType.Contact)
{
throw new EMVProtocolException("Invalid state for contact, gen ac 2 returned arqc?");
}
CARDHOLDER_VERIFICATION_METHOD_CVM_RESULTS_9F34_KRN cvmr = new CARDHOLDER_VERIFICATION_METHOD_CVM_RESULTS_9F34_KRN(data.Children.Get(EMVTagsEnum.CARDHOLDER_VERIFICATION_METHOD_CVM_RESULTS_9F34_KRN.Tag));
if (cvmr.Value.GetCVMPerformed() == CVMCode.EncipheredPINVerifiedOnline)
{
ContactlessApp_PinRequest(data.Children);
}
txResult = TxResult.ContactlessOnline;
}
if (((data.Children.Get(EMVTagsEnum.CRYPTOGRAM_INFORMATION_DATA_9F27_KRN.Tag).Value[0] & 0xC0) >> 6) == (byte)ACTypeEnum.TC)
{
txResult = TxResult.Approved;
}
if (((data.Children.Get(EMVTagsEnum.CRYPTOGRAM_INFORMATION_DATA_9F27_KRN.Tag).Value[0] & 0xC0) >> 6) == (byte)ACTypeEnum.AAC)
{
txResult = TxResult.Declined;
}
}
}
else if (qrData != null)
{
if (interFaceType == InterFaceType.QRCodeScanned)
{
txResult = TxResult.QRCodeScanned;
}
else if (interFaceType == InterFaceType.QRCodeToPoll)
{
txResult = TxResult.QRCodeToPoll;
}
}
else
{
txResult = TxResult.Declined;
}
SetTxFinalResultLabel(txResult.ToString());
}
else
{
SetStatusLabel(new UIMessageEventArgs(tpo.UserInterfaceRequest.MessageIdentifier, tpo.UserInterfaceRequest.Status), interFaceType);
}
}
catch (Exception ex)
{
Device.BeginInvokeOnMainThread(() =>
{
UIMessageEventArgs ui = new UIMessageEventArgs(MessageIdentifiersEnum.TryAgain, StatusEnum.ProcessingError)
{
AdditionalMessage = ex.Message
};
SetStatusLabel(ui, interFaceType);
});
}
finally
{
StopContactPaymentApp();
StopContactlessPaymentApp();
StopQRCodePollPaymentApp();
#region Merge EMV Lists
if (discretionaryData != null)
{
if (data != null)
{
data.Children.AddListToList(discretionaryData.Children);
}
}
#endregion
TxCompleted?.Invoke(this, new TxCompletedEventArgs(txResult, interFaceType, Optional <TLV> .Create(data), Optional <QRDEList> .Create(qrData)));
}
}