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About Hosted Payment Page

General information about Hosted Payment Page

The Hosted Payment Page is a checkout that contains only the step of selecting the payment method. It is a HTML form with responsive design that is displayed properly on all devices.

In the case of payments via Hosted Payment Page, the shop redirects its customers to the Paygate HTML form where they selects their payment method. After confirming the selection depending on the payment method Paygate forwards the customer to a Paygate HTML form or to a form from an external service provider and notifies the shop after completion about the payment result.

Following table contains the payment methods which you can use via Hosted Payment Page (click on header to sort by alphabet).

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Payment type

Zahlart

PayType

Credit card

Kreditkarte

CC

PayPal

PayPal

PayPal

Apple PayApple PayApplePay
Google PayGoogle PayGooglePay

Direct debit

Lastschrift

EDD

EPSEPSEPS

giropay

giropay

giropay

iDEAL

iDEAL

iDEAL

iDEAL via PPROiDEAL über PPROiDEALPP
KlarnaKlarnaKlarnaPM

paydirekt

paydirekt

paydirekt

PostFinance

PostFinance

POSTFINPP

Sofort

Sofort

Sofort

Alipay

Alipay

Alipay

B4PaymentB4PaymentB4Payment

Bancontact

Bancontact

BanconPP

Bank Transfer

Bank Transfer

BankTranPP

BitPay

BitPay

BitPayPP

BluecodeBluecodeBluecode
BoletoBoletoBoletoPP
ChinapayChinapayChinapay
CUPCUPCUPPP

Dragonpay

Dragonpay

DragonPP

eNETS

eNETS

ENETSPP

Finland Online Bank Transfer

Finland Online Bank Transfer

FinOBTPP

Indonesia ATM

Indonesia ATM

IndoATMPP

Multibanco

Multibanco

MultibanPP

My Bank

My Bank

MyBankPP

MyClear FPX

MyClear FPX

MyClearPP

Przelewy 24

Przelewy 24

P24PP

POLi

POLi

POLiPP

paysafecard

paysafecard

PSCPP

RHB Bank

RHB Bank

RHBBankPP

SafetyPay

SafetyPay

SafetyPPP

7-Eleven

7-Eleven

SevenElePP

Skrill

Skrill

SkrillPP

TrustPay

TrustPay

TrustPayPP

WechatWechatWechatPP


Following table lists all card brands that can be uses via the Hosted Payment Page. When submitting the value CC in parameter PayTypes all brands are displayed that are configured for a certain merchant. Selecting specific brands can be done by submitting a string of the desired brand names separated by pipe signs.

Kreditkartenmarke / Scheme Names → values for CCBrand

AirPlus

AMEX

ARGENCARD

Aura

Bancontact

CABAL

Cartes Bancaires

Maestro

CBN

CENCOSUD

ComfortCard

CUP

Dankort

DINERS

Discover

Elo

Hipercard

JCB

Maestro

MasterCard

NARANJA

RuPay

SHOPPING

TOTAL

VISA

Process of payment

To make payments via the Hosted Payment Page you send a request to following URL with HTTPS GET or HTTPS POST:

 

All details required for payment processing are forwarded as parameters. The parameters are encrypted with Blowfish to ensure that neither the customer nor a third party can manipulate the data.

When calling the form Paygate decrypts the parameters and shows the HTML page with the payment methods. The customer selects the payment method and triggers the forwarding by clicking the button "Next".

After the payment has been made Paygate redirects the customers back to a shop page via HTTPS GET (URLSuccess, URLFailure) and transmits the result of the payment as a Blowfish-encrypted parameter string to these URLs. In addition Paygate transmits the result via HTTPS POST to the shop's Notify page (URLNotify). The shop accepts the payment result and decrypts the data in order to inform the customer about the status.


Calling the Hosted Payment Page

Calling the Hosted Payment Page starts with the correct composition of the parameters which consist of a key and a value and which are separated by an equals sign (=):

MerchantID=Test

 

All parameters are assembled in a character string and separated by the character &:

Amount=100&Currency=EUR&TransID=12345

 

Notice: Since the characters "=" and "&" are used as separating characters, these characters cannot be transmitted as values. All values which you transmit without BlowFish-encryption must be URL-Encoded.

A correct parameter character string for Paygate contains three basic parameters: MerchantID, Len and Data. The parameters MerchantID and Len are unencrypted. Only the Data parameter is Blowfish-encrypted:

MerchantID=Test&Len=67&Data=0A67FE96a65d384350F50FF1

 

The Data parameter contains the sensitive payment details such as amount and currency. The encrypted bytes are Hex-encoded and completed to two characters from the left with a zero. Encryption is via Blowfish ECB and is available to you as source-code and components.

The Len parameter is very important for encryption because it contains the length of the unencrypted(!) character string in the Data parameter. Since the data quantity to be encrypted is increased by a multiple of 8 in the case of the Blowfish encryption, the correct length of the character string must be known for decryption. Otherwise accidental characters emerge at the end of the character string.

The parameters are transmitted via HTTPS POST or HTTPS GET. The recommended transmit method is HTTPS POST because the parameter character string in the case of GET is attached to the URL, which is limited to 2048 bytes depending on the browser.

Notice: Please note that the maximum length of a payment request is limited to 5120 characters. If you require longer strings please contact Computop Helpdesk.

The following listings show the development of a payment request. The first listing is the unencrypted parameter character string:

MerchantID=Test&TransID=100000001&Amount=11&Currency=EUR&URLSuccess=https://www.shop.com/ok.html&URLFailure=https://www.shop.com/failed.html&URLNotify=https://www.shop.com/notify.cgi&OrderDesc=My order

 

Notice: Please note that a value is to be assigned to each parameter. Do not transmit empty parameters, as this can cause the payment to fail.

This character string is encrypted and transmitted as the Data parameter. The HTTPS GET request for the Hosted Payment Page looks like this:

<a href=https://www.computop-paygate.com/paymentPage.aspx?MerchantID=Test&Len=162&Data=E98D40FFFD622C5FE7414F73539A1852C2CE7C8B09D34DF217E27FA2E194B9968DE9ABAE3B1F44B5485EFE3EF2597C7395BADBAD4340CDFD000DD57129EEFAA0BE904A7E2339DCF9363DA6ACDBE5EF98E169FC3092B160252A037135421FD0CE092C174A7D1D63517BD45099AC2B682F5E3CD2C942A6F0E741A833C0&Language=en&URLBack=https://www.shop.com/canceled”>


Notice: Please note that parameters like Language or URLBack are transmitted unencrypted. A table with all possible unencrypted parameters can be found also witihn this document.


Paygate interface

Definitions

Data formats

Format

Description

a

alphabetical

as

alphabetical with special characters

n

numeric

an

alphanumeric

ans

alphanumeric with special characters

ns

numeric with special characters

bool

boolean expression (true or false)

3

fixed length with 3 digits/characters

..3

variable length with maximum 3 digits/characters

enum

enumeration of allowed values

dttm

ISODateTime (YYYY-MM-DDThh:mm:ss)


Abbreviations

Abbreviation

Description

Comment

CND

condition


M

mandatory

If a parameter is mandatory, then it must be present

O

optional

If a parameter is optional, then it can be present, but it is not required

C

conditional

If a parameter is conditional, then there is a conditional rule which specifies whether it is mandatory or optional


Notice: Please note that the names of parameters can be returned in upper or lower case.


Parameters of the Hosted Payment Page

These parameters are mandatory for all payment methods and has to be submitted Blowfish-encrypted within the Data parameter to the Hosted Payment Page.

Notice: Please take all further parameters specifically for a payment method from the manual of that respective payment method.

The following table describes the encrypted payment request parameters:

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KeyFormatCNDDescriptionBeschreibung

MerchantID

ans..30

M

MerchantID, assigned by Computop. Additionally this parameter has to be passed in plain language too.

HändlerID, die von Computop vergeben wird. Dieser Parameter ist zusätzlich auch unverschlüsselt zu übergeben.

KeyFormatCNDDescriptionBeschreibung
Amount

n..10

M

Amount in the smallest currency unit (e.g. EUR Cent). Please contact the Computop Helpdesk, if you want to capture amounts <100 (smallest currency unit).

Betrag in der kleinsten Währungseinheit (z.B. EUR Cent). Bitte wenden Sie sich an den Computop Helpdesk, wenn Sie Beträge < 100 (kleinste Währungseinheit) buchen möchten.

KeyFormatCNDDescriptionBeschreibung
Currency

a3

M

Currency, three digits DIN / ISO 4217, e.g. EUR, USD, GBP. Please find an overview here: A1 Currency table

Währung, drei Zeichen DIN / ISO 4217, z.B. EUR, USD, GBP. Hier eine Übersicht: A1 Währungstabelle

KeyFormatCNDDescriptionBeschreibung

MAC

an64

M
Hash Message Authentication Code (HMAC) with SHA-256 algorithm. Details can be found here:
Hash Message Authentication Code (HMAC) mit SHA-256-Algorithmus. Details finden Sie hier:


KeyFormatCNDDescriptionBeschreibung
TransID

ans..64

MTransactionID provided by you which should be unique for each paymentIhre eigene TransaktionsID, die für jede Zahlung eindeutig sein muss

Key

Format

CND

Description

Beschreibung

RefNr

ns..30

O

Unique reference number
(warning) exact format depends on the available paymethods for your MerchantId. Please choose your format in that way that all paymethods are covered.

eindeutige Referenznummer
(warning) das genaue Format hängt von den Zahlarten Ihrer MerchantId ab. Wählen Sie das Format so, dass alle möglichen Zahlarten kompatibel sind.

OrderDesc

ans..384

M

Description of purchased goods, unit prices etc.

Please note: The first 27 characters appear on the customer-account statement. You can view the full data in Computop Analytics.

Beschreibung der gekauften Waren, Einzelpreise etc.

Bitte beachten Sie: Die ersten 27 Zeichen erscheinen auf dem Kontoauszug des Kunden. In Computop Analytics können Sie die kompletten Daten einsehen.

KeyFormatCNDDescriptionBeschreibung
UserData

ans..1024

O

If specified at request, Paygate forwards the parameter with the payment result to the shop.

Wenn beim Aufruf angegeben, übergibt das Paygate die Parameter mit dem Zahlungsergebnis an den Shop.

KeyFormatCNDDescriptionBeschreibung
URLSuccess

ans..256

M

Complete URL which calls up Paygate if payment has been successful. The URL may be called up only via port 443. This URL may not contain parameters: In order to exchange values between Paygate and shop, please use the parameter UserData.

(info) Common notes:

  • We recommend to use parameter "response=encrypt" to get an encrypted response by Paygate
  • However, fraudster may just copy the encrypted DATA-element which are sent to URLFailure and send the DATA to URLSuccess. Therefore ensure to check the "code"-value which indicates success/failure of the action. Only a result of "code=00000000" should be considered successful.

Vollständige URL, die das Paygate aufruft, wenn die Zahlung erfolgreich war. Die URL darf nur über Port 443 aufgerufen werden. Diese URL darf keine Parameter enthalten: Um Parameter durchzureichen nutzen Sie stattdessen den Parameter UserData.

(info) Allgemeine Hinweise:

  • Wir empfehlen, den Parameter "response=encrypt" zu verwenden, um eine verschlüsselte Antwort von Paygate zu erhalten
  • Betrüger könnten das verschlüsselte DATA-Element kopieren, welches an URLFailure gesendet wurde, und betrügerisch dasselbe DATA an URLSuccess senden. Überprüfen Sie daher unbedingt den "code"-Wert des DATA-Elements. Nur eine Antwort mit "code=00000000" sollte als erfolgreich angesehen werden.

KeyFormatCNDDescriptionBeschreibung
URLFailure

ans..256

M

Complete URL which calls up Paygate if payment has been unsuccessful. The URL may be called up only via port 443. This URL may not contain parameters: In order to exchange values between Paygate and shop, please use the parameter UserData.

(info) Common notes:

  • We recommend to use parameter "response=encrypt" to get an encrypted response by Paygate
  • However, fraudster may just copy the encrypted DATA-element which are sent to URLFailure and send the DATA to URLSuccess/URLNotify. Therefore ensure to check the "code"-value which indicates success/failure of the action. Only a result of "code=00000000" should be considered successful.

Vollständige URL, die das Paygateaufruft, wenn die Zahlung gescheitert ist. Die URL darf nur über Port 443 aufgerufen werden. Diese URL darf keine Parameter enthalten: Um Parameter durchzureichen nutzen Sie stattdessen den Parameter UserData.

(info) Allgemeine Hinweise:

  • Wir empfehlen, den Parameter "response=encrypt" zu verwenden, um eine verschlüsselte Antwort von Paygate zu erhalten
  • Betrüger könnten das verschlüsselte DATA-Element kopieren, welches an URLFailure gesendet wurde, und betrügerisch dasselbe DATA an URLSuccess/URLNotify senden. Überprüfen Sie daher unbedingt den "code"-Wert des DATA-Elements. Nur eine Antwort mit "code=00000000" sollte als erfolgreich angesehen werden.

KeyFormatCNDDescriptionBeschreibung
Response

a7

O

Status response sent by Paygate to URLSuccess and URLFailure, should be encrypted. For this purpose, transmit Response=encrypt parameter.

Die Status-Rückmeldung, die das Paygate an URLSuccess und URLFailure sendet, sollte verschlüsselt werden. Dazu übergeben Sie den Parameter Response=encrypt.

KeyFormatCNDDescriptionBeschreibung
URLNotify

ans..256

M

Complete URL which Paygate calls up in order to notify the shop about the payment result. The URL may be called up only via port 443. It may not contain parameters: Use the UserData parameter instead.

(info) Common notes:

  • We recommend to use parameter "response=encrypt" to get an encrypted response by Paygate
  • However, fraudster may just copy the encrypted DATA-element which are sent to URLFailure and send the DATA to URLSuccess/URLNotify. Therefore ensure to check the "code"-value which indicates success/failure of the action. Only a result of "code=00000000" should be considered successful.

Vollständige URL, die das Paygate aufruft, um den Shop zu benachrichtigen. Die URL darf nur über Port 443 aufgerufen werden. Sie darf keine Parameter enthalten: Nutzen Sie stattdessen den Parameter UserData.

(info) Allgemeine Hinweise:

  • Wir empfehlen, den Parameter "response=encrypt" zu verwenden, um eine verschlüsselte Antwort von Paygate zu erhalten
  • Betrüger könnten das verschlüsselte DATA-Element kopieren, welches an URLFailure gesendet wurde, und betrügerisch dasselbe DATA an URLSuccess/URLNotify senden. Überprüfen Sie daher unbedingt den "code"-Wert des DATA-Elements. Nur eine Antwort mit "code=00000000" sollte als erfolgreich angesehen werden.

Parameters for Hosted Payment Page


Following parameters are optional and can be submitted unencrypted to the Hosted Payment Page:

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Key

Format

CND

Description

Beschreibung
Templateans..20O

Name of XSLT-file with your own layout for the HPP pay form.

Name der XSLT-Datei mit Ihrem individuellen Layout für das HPP Bezahlformular.

CCTemplate

ans..20

O

Name of XSLT-file with your own layout for the pay form. If you want to use the redesigned and downwards compatible Computop template, please transfer the template name “ct_compatible”. If you want to use the responsive Computop template for mobile devices, please transfer the template name “ct_responsive”.

The payment method "Bancontact" can also be called via payssl.aspx. Therefore "template=ct_bcmc" has to be submitted mandatory, in order to the special Bancontact template will be used. It should be noted that Bancontact must already be selectable as a payment method in the checkout process. The template cannot be modified and must be used in exactly the same way, as it is based on strict Bancontact guidelines. This is only valid for integration with Omnipay: EMS payment solutions.|

Name der XSLT-Datei mit Ihrem individuellen Layout für das Bezahlformular. Wenn Sie das neugestaltete und abwärtskompatible Computop-Template nutzen möchten, übergeben Sie den Templatenamen „ct_compatible“. Wenn Sie das responsive Computop-Template für mobile Endgeräte nutzen möchten, übergeben Sie den Templatenamen „ct_responsive“.

Die Zahlungsart "Bancontact" kann ebenfalls über die payssl.aspx aufgerufen werden. Dazu muss "template=ct_bcmc" als Pflichtparameter übergeben werden, damit das spezielle Bancontact-Template aufgerufen werden kann. Dabei ist zu beachten, dass Bancontact als Zahlungsart im Checkout-Prozess bereits auswählbar sein muss. Das Template ist nicht modifizierbar und muss genauso verwendet werden, da es sich an strikten Bancontact-Richtlinien orientiert. Diese Variante gilt nur in Verbindung mit "Omnipay: EMS payment solutions".

SDDTemplate

ans..20

O

Name of XSLT-file with your own layout for the direct debit form. This is used only if the customer selects direct debit as payment method and clicks on „Next“ button.

If you don't submit a value the responsive Computop direct debit form template is displayed.

Name der XSLT-Datei mit Ihrem individuellen Layout für das Lastschriftenformular. Dies greift nur, wenn der Kunde Lastschrift als Zahlart auswählt und auf die Schaltfläche „Weiter“ klickt.

Wenn Sie keinen Wert übergeben, wird das responsive Computop-Lastschriftenformular-Template angezeigt.

Language

a2 (enum)

O

Language code: <de> German, <al> Albanian, <at> Austrian, <cz/cs> Czech, <dk> Danish, <en> English, <fi> Finish, <fr> French, <gr> Greek, <hu> Hungarian, <it> Italian, <jp> Japanese,  <nl> Dutch, <no> Norwegian, <pl> Polish, <pt> Portuguese, <ro> Romanian, <ru> Russian, <es> Spanish, <se> Swedish, <sk> Slovakian, <sl> Slovenian, <tr> Turkey, <zh> Simplified Chinese.

No details means the language is German.

(info) The supported languages may vary depending on the selected template.

Sprachcode: <de> deutsch, <al> albanisch, <at> österreichisch, <cz/cs> tsche-chisch, <dk> dänisch, <en> englisch, <fi> finnisch, <fr> französisch, <gr> grie-chisch, <hu> ungarisch, <it> italienisch, <jp> japanisch, <nl> holländisch, <no> norwegisch, <pl> polnisch, <pt> portugiesisch, <ro> rumänisch, <ru> russisch, <es> spanisch, <se> schwedisch, <sk> slowakisch, <sl> slowenisch, <tr> tür-kisch, <zh> Simplified Chinese

Ohne Angabe ist die Sprache Deutsch.

(info) Die tatsächlich unterstützten Sprachen hängen vom verwendeten Template ab.

KeyFormatCNDDescriptionBeschreibung
URLBack

ans..256

O

Complete URL which Paygate calls in case that Cancel is clicked by the customer.

The parameter "URLBack" can be sent

  • either as plain parameter (unencrypted) (compatibility mode)
  • or be part of encrypted payment request parameters (preferred mode)

Vollständige URL, die das Paygate aufruft, wenn der Kunde auf Abbruch klickt.

Der Parameter "URLBack" kann

  • sowohl unverschlüsselt ans Paygate übermittelt werden (Kompabilitätsmodus)
  • als auch in den verschlüsselten Übergabeparametern (bevorzugte Variante)

Key

Format

CND

Description

Beschreibung

PayTypes

ans..256

O

With this parameter you can override the payment methods to be displayed, i.e. you can decide within this parameter separated by pipe which of the available payment methods are displayed.

Take the possible values from the column PayType within the table of payment methods given above.

Example: …&PayTypes=CC|EDD|Alipay

Mit diesem Parameter können Sie die anzuzeigenden Zahlarten übersteuern, d.h. sie können in diesem Parameter Pipe-getrennt entscheiden, welche der zur Verfügung stehenden Zahlarten angezeigt werden.

De möglichen Werte entnehmen Sie aus der Spalte PayType in der obigen Tabelle der Zahlarten.

Beispiel: …&PayTypes=CC|EDD|Alipay

Optional parameters for Hosted Payment Page



General response parameters of the Hosted Payment Page

These parameters are equally for all payment methods. With the parameter pt you can see which payment method the customer used. Please take all further parameters specifically for a payment method from the manual of that respective payment method.

The following table gives the result parameters which Computop Paygate transmits to URLSuccess or URLFailure and URLNotify. If you have specified the Response=encrypt parameter, the following parameters are sent Blowfish encrypted to your system:

(info) pls. be prepared to receive additional parameters at any time and do not check the order of parameters

(info) the key (e.g. MerchantId, RefNr) should not be checked case-sentive

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KeyFormatCNDDescriptionBeschreibung

mid

ans..30

M

MerchantID, assigned by Computop

HändlerID, die von Computop vergeben wird

Key

Format

CND

Description

Beschreibung

ptans..256OInformation about the used paytype according to the table of payment types aboveInformationen über die verwendete Zahlungsart gemäß obiger Tabelle der Zahlungsarten

KeyFormatCNDDescriptionBeschreibung
PayID

an32

M

ID assigned by Paygate for the payment, e.g. for referencing in batch files as well as for capture or credit request.

Vom Paygate vergebene ID für die Zahlung; z.B. zur Referenzierung in Batch-Dateien sowie im Capture- oder Credit-Request.

KeyFormatCNDDescriptionBeschreibung
XID

an32

M

ID for all single transactions (authorisation, capture, credit note) for one payment assigned by Paygate

Vom Paygate vergebene ID für alle einzelnen Transaktionen (Autorisierung, Buchung, Gutschrift), die für eine Zahlung durchgeführt werden

KeyFormatCNDDescriptionBeschreibung
TransID

ans..64

MTransactionID provided by you which should be unique for each paymentIhre eigene TransaktionsID, die für jede Zahlung eindeutig sein muss

KeyFormatCNDDescriptionBeschreibung
Status

a..50

M

OK or AUTHORIZE_REQUEST (URLSuccess) as well as FAILED (URLFailure)

OK oder AUTHORIZE_REQUEST (URLSuccess) sowie FAILED (URLFailure)

KeyFormatCNDDescriptionBeschreibung
Description

ans..1024

M
Further details in the event that payment is rejected. Please do not use the Description but the Code parameter for the transaction status analysis!
Nähere Beschreibung bei Ablehnung der Zahlung. Bitte nutzen Sie nicht den Parameter Description, sondern Code für die Auswertung des Transaktionsstatus!

KeyFormatCNDDescriptionBeschreibung
Code

n8

M

Error code according to Paygate Response Codes (A4 Error codes)

Fehlercode gemäß Paygate Antwort-Codes (A4 Fehlercodes)

KeyFormatCNDDescriptionBeschreibung

MAC

an64

M
Hash Message Authentication Code (HMAC) with SHA-256 algorithm. Details can be found here:
Hash Message Authentication Code (HMAC) mit SHA-256-Algorithmus. Details finden Sie hier:

KeyFormatCNDDescriptionBeschreibung
UserData

ans..1024

O

If specified at request, Paygate forwards the parameter with the payment result to the shop.

Wenn beim Aufruf angegeben, übergibt das Paygate die Parameter mit dem Zahlungsergebnis an den Shop.

KeyFormatCNDDescriptionBeschreibung
Plain

ans..50

O

A single value to be set by the merchant to return some information unencrypted in response/notify, e.g. the MID. 

"Plain"-parameter is part of encrypted "Data" in Computop Paygate and therefore protected against manipulation. 

Ein einzelner Wert, der von Ihnen gesetzt werden kann, um Informationen wieder unverschlüsselt in der Antwort bzw. im Notify zurückzugeben, z.B. die MID.

Da der "Plain"-Parameter Teil des verschlüsselten "Data" im Computop Paygate ist, ist dieser vor Manipulationen geschützt. 

KeyFormatCND

Description

Beschreibung
Custom

ans..1024

O

"Custom"-parameter is added to the request data before encryption and is part of encrypted "Data" in Computop Paygate request. By this they are protected against manipulation by a consumer. 

The Custom-value is added to the Computop Paygate response in plain text and the "|" is replaced by a "&". By this you can put a single value into Custom-parameter and get multiple key-value-pairs back in response for your own purpose. 

Please find a samples here: Custom

Der "Custom"-Parameter wird vor der Verschlüsselung an den Aufruf angehängt und ist Teil des verschlüsselten "Data" im Computop Paygate Aufruf. Dadurch ist der Wert gegen Manipulation geschützt. 

Der Custom-Wert wird dann in Klartext an die Computop Paygate-Antwort angehängt und dabei wird "|" durch "&" ersetzt. Dadurch können Sie einen Custom-Wert übergeben und bekommen mehrere Key-Value-Paare zu Ihrer eigenen Verwendung in der Antwort zurück.

Hier finden Sie ein Beispiel: Custom

General response parameters for URLNotify, URLSuccess and URLFailure


Corporate PaymentPage: XSLT layout for forms

You can change the parameter Template to create an individual layout for your Hosted Payment Page form which exactly matches the shop layout To this end your graphic designer can design an HTML-template in the shop-design based on XSLT (Extensible Stylesheet Language Transformation). Computop Helpdesk copies this XSLT-template to our Paygate Server. If you enter the name of your XSLT-file in the Template parameter, the Paygate form will appear in your layout.

The XSLT templates for the Hosted Payment Page form have several advantages:

  1. Merchants can bypass the costly PCI-security authorisation
  2. The Hosted Payment Page is responsive, i.e. it works on Smartphones, Tablets or on the Laptop

For general information about XSLT see www.w3.org.


The subsequent conventions apply for the use of the Corporate Paypage with XSLT:

File names

A XSL file designed by you defines your individual layout. The associated XML file contains the texts that are to be displayed on the form. Hence, multilingualism is easy. Always use your MerchantID in the names of the files.

PurposeNaming
XSL templateMerchantID_PaymentPage.xsl
XML text fileMerchantID_PaymentPage.xml
Sub folder for pictures, CSS- and JS-filesTemplates/imagesMerchantID_PaymentPage


In order not to receive safety notices, please ensure that external image sources are retrieved via SSL.

In order to call the individual layout, use the ‘Template’ parameter with your MerchantID and attach it unencrypted to the call of the form of Hosted Payment Page, for example:

https://www.computop-paygate.com/paymentPage.aspx?MerchantID=IhreMID&Len=123&Data=AGSDJ…ASDF&template=IhreMerchantID


Hidden Fields

The following hidden fields must be implemented so that the values can be passed on when sending the form:

Value ofName of hidden field
MerchantID"MerchantID"
Request length"Len"
Request data"Data"
Template"Template"
Language"Language"
URL for back button"URLBack"
Payment method"PaymentMethod"
Credit card brand"CreditCardBrand"

Language selection

The language selection on the Hosted Payment Page form occurs automatically depending on the parameter Language. Other language areas are filtered out. If you wish to access the field of another language area e.g. with JavaScript, you can do so via the following path: paygate/language/@name.

XML structure

The ‘Language’ parameter controls which section of the XML text file is read out. German ‘de’ is always used as standard.

The XML file should have the following basic structure:

<?xml version="1.0" encoding="utf-16"?>
      </languages>
            <language name="de">
                  <title>Zahlung</title>
                  ...
            </language>
            <language name="en">
                  <title>Payment</title>
                  ...
            </language>
      </languages>


‘UTF-8’ is also possible for the encoding.

With <xsl:variablename=““ select=“paygate/language/@name”/> you can directly address an XML language section from the XSL file.

For an overview of which parameters are rendered by the Hosted Payment Page, please examine the following structure (XSL file is rendered against the following XML string):

strXML = "<?xml version='1.0' encoding='windows-1252'?>" & _
<paygate>
      <merchantID>...</merchantID>
      <len>257</len>
      <data>E98D4...F7065</data>
      <template>
      <urlBack><![CDATA[http://www.google.de]]></urlBack>
      <paymentMethods>
            <VISA type="CC" displayName="Visa"/>
            <MasterCard type="CC" displayName="MasterCard"/>
            <AMEX type="CC" displayName="American Express"/>
            <DINERS type="CC" displayName="Diners Club International"/>
            <Discover type="CC" displayName="Discover"/>
            <JCB type="CC" displayName="JCB"/>
            <EDD lowercase="edd">
            <PayPal lowercase=="paypal">
            <iDEAL lowercase=="ideal">
      </paymentMethods>
      <language name="de">
            <title>Zahlung</title>
            ...
      </language>
</paygate>

In your XSL file you can access each single value within this XML structure which is rendered in the backend based on the XML language file and additional values.

JavaScript

You can find individual JavaScript methods either in the HEAD section of your XSL file or within the file main.js that can be found in the images folder at Templates/imagesMerchantID_PaymentPage/js.

Notice: Please do not use any external links to your JavaScript!