V2 and postback processors

[Charlie Piper]

Greetings all,

I've been browsing through the Business::OnlinePayment namespace over the
past few days looking for a new solution for a cart that I am developing.
One thing that I am noticing is that there isn't an example of a backend
that processes via a postback from the payment processor.  Does anyone have
any have any experience with postback processing or is it completely taboo
to do via Business::OnlinePayment?

I've been mainly working with iTransact[1] which uses postback[2] by
default.  I've come up with a couple of possibilities but I want to get some
feedback on the postback issue before I go too much farther.

I also looked into how interchange handles this (Vend::Payment::iTransact)
and while it's an interesting solution there are pieces of the puzzle
missing.  You either find out if the transaction succeeded or you get the
errors back.  If the transaction succeeded, don't end up with any
authorization details.

And finally, I do have some code for the iTransact XML[3] direct version.
Is there a problem converting this to a module compatible with
Business::OnlinePayment series and uploading to the namespace after review?

Best Regards,
Charlie

[1] http://www.itransact.com/
[2] http://www.itransact.com/support/connect_html.html
[3] http://www.itransact.com/support/connect_xml_fe.html