My forum is running on vBulletin 4.2.* (will specify full version number after you're accepted for the project)
I've tried implementing this and it seems it's not working properly: [url removed, login to view]
What I want from you:
Make a fully working Payment Gateway for vBulletin.
It must work 100% with the current API of Coinbase.
It must be fully automatic, no manual approvals after payment is done from the user.
It must accept only Bitcoin (Litecoin and Ethereum might be an option).
It should be secure, not vulnerable to exploits.