I think you could, but you would need to find a way to generate addresses and confirm payments.
I'm currently working on a NLG-only payment processor myself, but I need a bit more time to fully implement and test it. It will also work a bit different (through an API, so as a customer you'll never be redirected to the payment processor).
Yes, well, you could build it on top of Nocks if you want. We have an API.
Edit: IF you want that, coordinate with Patrick as he's already working on them tools

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