- Upload the contents of the
uploadfolder to your WHMCS root directory. You should now havemodules/gateways/payfim.php,modules/gateways/payfim/andmodules/gateways/callback/payfim.php. - In WHMCS admin go to Setup → Payments → Payment Gateways (WHMCS 8: System Settings → Payment Gateways) → All Payment Gateways and click Payfim Crypto Payments.
- Paste your Payfim Gateway URL and API Key, optionally change the display name and button text, and save.
- Create a test invoice for your own client account and pay it.
Payments appear on the invoice with the blockchain transaction hash and in Billing → Gateway Log.
