Improve discountpayment for EpsonRT Printer

[danielscainifiskaltrust]

Now, using downpayment according this table https://docs.fiskaltrust.eu/docs/poscreators/middleware-doc/italy/reference-tables/ftpayitemcase the scu send to the epson printer this xml:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
  <soapenv:Body>
    <printerFiscalReceipt>
      <beginFiscalReceipt />
              <printRecItem description="Artikel1" quantity="1,0" unitPrice="1" department="1" justification="1" />
                    <printRecItem description="Artikel2" quantity="1,0" unitPrice="2" department="1" justification="1" />
                    <printRecTotal description="Cash" payment="-1,0" paymentType="0" index="0" justification="1" />
                    <printRecTotal description="Cash" payment="2,0" paymentType="0" index="0" justification="1" />
            <endFiscalReceipt />
    </printerFiscalReceipt>
  </soapenv:Body>
</soapenv:Envelope>

And get back:

<?xml version="1.0" encoding="utf-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
    <soapenv:Body>
        <response success="false" code="PRINTER ERROR" status="16">
            <addInfo>
                <elementList>lastCommand,printerStatus</elementList>
                <lastCommand>84</lastCommand>
                <printerStatus>00100</printerStatus>
            </addInfo>
        </response>
    </soapenv:Body>
</soapenv:Envelope>

I suppose that the real xml need to be this one:

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
  <soapenv:Body>
    <printerFiscalReceipt>
      <beginFiscalReceipt />
              <printRecItem description="Artikel1" quantity="1,0" unitPrice="1" department="1" justification="1" />
                    <printRecItem description="Artikel2" quantity="1,0" unitPrice="2" department="1" justification="1" />
                    <printRecTotal description="Discount" payment="1,0" paymentType="6" index="0" justification="1" />
                    <printRecTotal description="Cash" payment="2,0" paymentType="0" index="0" justification="1" />
            <endFiscalReceipt />
    </printerFiscalReceipt>
  </soapenv:Body>
</soapenv:Envelope>

Because in that case i get back the real response.
The initial Request json (ft interface) is something like that:

{
  "ftCashBoxID": "{{cashbox_id}}",
  "cbTerminalID": "",
  "ftPosSystemId": "7b5955e3-4944-4ff3-8df9-46166b70132a",
  "cbReceiptReference": "12-1769703083674",
  "cbArea": "0",
  "cbUser": "Chef",
  "cbCustomer": null,
  "ftReceiptCaseData": null,
  "ftReceiptCase": 5283883447184523265,
  "cbChargeItems": [
    {
      "Amount": 1,
      "Description": "Artikel1",
      "ProductNumber": "1",
      "Quantity": 1,
      "VATRate": 22,
      "ftChargeItemCase": 5283883447184523267,
      "Moment": "{{current_moment}}",
      "Position": 1
    },
    {
      "Amount": 2,
      "Description": "Artikel2",
      "ProductNumber": "2",
      "Quantity": 1,
      "VATRate": 22,
      "ftChargeItemCase": 5283883447184523267,
      "Moment": "{{current_moment}}",
      "Position": 2
    }
  ],
  "cbPayItems": [
    {
      "Quantity": 1,
      "Moment": "{{current_moment}}",
      "Description": "Cash",
      "Amount": -1,
      "ftPayItemCase": 5283883447185047552
    },
    {
      "Quantity": 1,
      "Moment": "{{current_moment}}",
      "Description": "Cash",
      "Amount": 2,
      "ftPayItemCase": 5283883447184523265
    }
  ],
  "cbReceiptMoment": "{{current_moment}}"
}