example struct

type Header struct {
	LicenseId       int    `xml:"hps:LicenseId"`
	SiteId          int    `xml:"hps:SiteId"`
	DeviceId        int    `xml:"hps:DeviceId"`
	UserName        string `xml:"hps:UserName,omitempty"`
	Password        string `xml:"hps:Password,omitempty"`
	CredentialToken string `xml:"hps:CredentialToken,omitempty"`
	SiteTrace       string `xml:"hps:SiteTrace,omitempty"`
	DeveloperID     string `xml:"hps:DeveloperID,omitempty"`
	VersionNbr      string `xml:"hps:VersionNbr,omitempty"`
	ClerkID         string `xml:"hps:ClerkID,omitempty"`
	ClientTxnId     int64  `xml:"hps:ClientTxnId,omitempty"`
	UniqueDeviceId  string `xml:"hps:UniqueDeviceId,omitempty"`
	ServiceUri      string `default:"https://cert.api2.heartlandportico.com/Hps.Exchange.PosGateway/PosGatewayService.asmx"`
}

type Transaction struct {
	CreditAuth CreditAuth `xml:"hps:CreditAuth"`
	CreditSale CreditSale `xml:"hps:CreditSale"`
}


type CreditAuth struct {
	Block1         Block1 `xml:"hps:Block1"`
}

type CreditSale struct {
	Block1 Block1 `xml:"hps:Block1"`
}

type Block1 struct {
	Text     string   `xml:",chardata"`
	CardData CardData `xml:"hps:CardData"`
	Amt      string   `xml:"hps:Amt"`
	AllowDup string   `xml:"hps:AllowDup"`
	TagData  TagData  `xml:"hps:TagData"`
}

type CardData struct {
	TrackData TrackData `xml:"hps:TrackData"`
}

type TagData struct {
	TagValues `xml:"hps:TagValues"`
}

type TagValues struct {
	Text   string `xml:",chardata"`
	Source string `xml:"hps:source,attr"`
}

type TrackData struct {
	Text   string `xml:",chardata"`
	Method string `xml:"hps:method,attr,omitempty"`
}