background payment validation

Hey,

I have a plug-in that redirects to a payment gateway for payment (using process_button()), and then back to the site and successfully updates the cart (using before_process()).

Sometimes the response message gets lost though. I am looking to implement a feature that the payment gateway supports called background validation. This is a server side post from the gateway to the cart with the result of the transaction, including the transaction details. The gateway will retry this until it gets a specific output in the body, thereby acting as a fail-safe.

What function in the module would be best to implement this?

Kevin

Is this not possible at all?

How can anybody answer this when we don't even know what payment module you have, let alone being familiar with the mod's code and operation?

gjh42,

Sorry for the lack of information. I have attached the plug-in, it's one I have written for my company.

Is it possible to add a hook to send the server side post to?

Kevin