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Setting Up 2Checkout
Question
You say you support 2CheckOut.com on CactuShop, but I can't see any option for this in the backend. How do I set up this gateway?
Answer
2Checkout uses the same config settings as authorizenet. This is because 2checkout handily, and perhaps not coincidentally, uses exactly the same protocol as AuthorizeNet. So to setup 2checkout you do exactly as you would for authorizenet - set the 'paymentsystem' to 'authorizenet' then configure the AuthorizeNet config settings.
Set the AUTHNET_AuthorizeNetURL config setting to https://www.2checkout.com/cgi-bin/Abuyers/purchase.2c (case sensitive). AUTHNET_CallbackURL, AUTHNET_ReturnURL, AUTHNET_TestMode and AUTHNET_TxnKey are not used, and can be left blank. The other AUTHNET config settings should be self-explanatory.
You will also need to configure settings from the 2Checkout side.
See section 6.6 in the developer manual for more information.