help on new payment plugin

-- url of the page with the problem -- : www.feeenenridders.be
-- HikaShop version -- : 2.2.1
-- Joomla version -- : 1.5
-- PHP version -- : x.x.x
-- Browser(s) name and version -- : XXXXX x.x.x
-- Error-message(debug-mod must be tuned on) -- : Error_message

Hi,

My customer asked me to implement a payment plugin for a Sofort banking transaction. Underneath you can find a brief description of the steps to be implemented:
1/ authentication to the SOFORT gateway with API Key (post XML file on SOFORT Gateway interface)
2/ response (xml) is received with payment url
3/ customer has to be redirected to this payment URL in order to start a payment transaction
4/ if payment success a XML notification will be received from SOFORT gateway
5/ (optional) transaction details can be requested (XML)
6/ customer is redirected to a success link
I have no knowledge making new Joomla plugins, but as I have programming background I don't think this should be a big problem. Can you please advise how to start building this plugin? Or do you have any knowledge about a similar existing plugin?

Thank you very much for your help!
Wbr, Luc

Hi,

Thank you very much for your quick response.
Can you please tell me which existing payment plugin is the best base for my to be developed plugin? Is there any plugin existing with likely the same steps as I described?

Wbr, Luc

Hi Nicolas,

If I understand you right this is where I can read more about NETS:
www.hikashop.com/support.html#hk5

but as we see here there is nothing about NETS.
so where?

Thanx!