Create new payment gateway (Payment Kiosks) using domain name (not invoice)

[Khachatur Ashotyan]

Hi Friends!

I want to build a new payment gateway for payment kiosk's, and I have some questions. Making payment using invoice number is simple, but I want to use domain name for some transactions (domain renew, etc.). 

So,

I imagine this operation in the way that, I should create custom Invoice in my code (for domain renew), and make transaction with that invoice id. So,

• It is possible to create invoice in code? 
• WHMCS has a function for creating Invoice in code?

Thanks for Advance,

Khachatur.

[Remitur]

You have CreateInvoice API function: https://developers.whmcs.com/api-reference/createinvoice/

and a full family of invoice-related API functions:  https://developers.whmcs.com/api/api-index/