Is it difficult to make such a payment method in an online store?

Question

WordPress

Good day! We created an online store, but then a problem arose that visa, mastercard are not so popular in our country ... We wanted to connect a national card (electronic wallet). We contacted the bank and opened an account and they gave us a link to the file that we need to make the payment, there is an instruction there, but I didn’t understand because I’m new to this business. If anyone knows where to dig or there are lessons about it, share if you can for money. Here is a link to the file
https://github.com/Alif-Capital/sdk

Answer 1

So you have an instruction on the link.
It is the first one and opens
Read it carefully

Answer 2

Hello!
You have an online store on VP + Vukomerc.
The link you were given is the SDK and, accordingly, based on this SDK, you need to write a plugin for Vukomertz (payment gateway). But how to write it is already written in the documentation of this PHP scripts, the link to which you threw off.
Better yet, hire a programmer and let him write a small payment gateway