I coded a gateway for iDeal through MultiSafepay in EE4. Before I can send the visitor to this off site gateway I need to ask them what their bank is (issuer). I want to ask them this by presenting them a dropdown after they choose the gateway. What’s the best way to achieve this? I got this working by renedering the dropdown in the message HTML and setting a cookie using Javascript, but that doesn’t seem to be the best way.
After I fix this I think I got a pretty clean solution for MultiSafepay iDeal transactions, the number one payment method in the Netherlands.
Actually, doing it with AJAX may be your easiest route. The other two alternatives would be to set up a separate page to submit the bank issuer form to, which would then process and redirect the user to the iDeal site, or to hook into EE4’s system of handling requests, which can be quite challenging.
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