Step 1: Payment Gateway Files Upload payment gateway module file inside the /modules/gateways/ folder of your WHMCS installation.
Step 2: Add Gateway Activation To enable the payment gateway in WHMCS:
Log in to your WHMCS Admin Panel. Navigate to Setup > Payments > Visit Apps & Integrations. Under All Payment Gateways, find and activate your custom gateway "QR Payment." Configure the QR Code Image URL and Description fields in the module configuration.
Step 3: Test the Integration Once activated, create an invoice to see the QR code and payment instructions displayed to the customer.
The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.
Initial release of QR Payment For Whmcs.
Easily accept Bitcoin, Tether, Ethereum and many other crypto payments on your WHMCS website
No Fees, Easy Setup. Accept cryptocurrencies like: Bitcoin, Bitcoin Cash, Ethereum and Litecoin!
With this WHMCS module, you'll get the payment gateway fees from your clients directly.
Open your web site to shopping with the advantages of PayTR. Take your payments securely.
Jaap NS @jaap4872
so far so good, simple but everything OK , please keep updating,thanks