Maintenance Work Notice!
We will carry out maintenance work on this documentation on Tuesday, 15.06.2021 between 3 pm and 4 pm CEST. Thank you for your understanding.
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) Abbreviation Description CND condition M mandatory O optional C conditional Notice: Please note that the names of parameters can be returned in upper or lower case.
Comment If a parameter is mandatory, then it must be present If a parameter is optional, then it can be present, but it is not required If a parameter is conditional, then there is a conditional rule which specifies whether it is mandatory or optional
alphabetical with special characters
alphanumeric with special characters
numeric with special characters
boolean expression (true or false)
fixed length with 3 digits/characters
variable length with maximum 3 digits/characters
enumeration of allowed values
Notice: Please note that the names of parameters can be returned in upper or lower case.
Computop server will execute an HTTPS POST request directly to the web server of the Partner (URL) . To integrate with this notification, the Partner should supply Computop with the IP address and the URL that leads to the callback entry point of the server. This is usually a small module/application, which constantly listens and waits for incoming HTTPS requests from Computop’s server. The Computop server will send data via an HTTPS POST request to the server URL configured including all the relevant parameters in the HTTPS POST request.
The parameters will be transmitted in the HTTP Body as a Blowfish encrypted parameter string. The content type will be application/x-www-form-urlencoded; charset=iso-8859-1.
Note: Please note that the Notify-call is permitted only via Port 443 (SSL) for security reasons. The URL encoded parameters are transmitted in key-value pairs.
If one of these parameters (IP or URL) during time changes, the partner should notify Computop support to perform the related configuration changes.
For security reasons a common Blowfish Secret Key (password) will be shared between Computop and the Partner regarding this notification process and the parameter MAC should be present in the callback request.
The calculation of the MAC value is done using SHA-256 algorithm and with the subsequent parameter values: PayID*XID*TransID*MerchantID*Status*Code.
The receiver should use the MAC SHA-256 algorithm, which nearly all programming languages support, to calculate the hash value with the HMAC key and the parameter values.
Computop Paygate will submit a notification request via HTTP POST in order to transfer the authorization status and transaction details to the server URL as stored in the merchant configuration.
The following table describes the Paygate response parameters:
MerchantID, assigned by Computop
ID assigned by Paygate for the payment, e.g. for referencing in batch files
ID for all single transactions (authorization, capture, credit note) for one payment assigned by Paygate
Merchant’s transaction number
Please note for some connections the different formats that are given within the specific parameters.
Status of the action performed: OK or FAILED
Further details in the event that payment is rejected. Please do not use the Description but the Code parameter for the transaction status analysis!
Error code according to Paygate Response Codes (A4 Error codes)
Merchant’s unique reference number
|MAC||an64||M||Hash Message Authentication Code (HMAC) with SHA-256 algorithm|
Card scheme brand (e.g. Visa, MasterCard, Maestro etc.)
Please note the spelling! According to table of credit card brands!
|MaskedPan||an..19||OC||Masked card number (6X4). Format: 666666XXXXXX4444 (X masking digit)|
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).
|Currency||a3||M||Currency, three digits DIN / ISO 4217|
Action name being performed which triggered the notification message.
Expected values such as:
|AQ||ans..3||OC||Acquirer short code (valid for credit card payments only)|
Showing the name of the payment type used.
Expected values such as:
Note: Please get in touch with Computop Merchant Services team for a full list of supported payment methods.
|TimeStamp||ans..20||M||Timestamp of the performed original TxType within format: DD.MM.YYYY HH:MM:SS|
The entry method/channel which was used for the original TxType triggering this notification.
Values like: Client, Server, Analytics, Payshow
|TerminalID||an..8||C||Acquirer Terminal ID (valid for credit cards only)|
|VUNr||n5..12||C||Merchant contract number. The length depends on the acquirer. (valid for credit cards only)|
Response parameters for Third-party notification service via socket connections
The request will be sent in real-time. If the specified URL is not accessible Paygate will retry the notification according to the following time schedule.
Time after 1. Notify
If the maximum number of repeats is reached and the Partner Web Service is still not available the retries will no longer be re-attempted.