Hello Mirven,
Thank you for the suggestion. I am taking note of the guide you sent me.
Unfortunately, this feature would definitely take more time than you suggest, and I am currently very busy with other dashed-slug extensions.
If I do find the time to implement such a payment gateway, then I will let you know on this thread. However this is unlikely for the time being, as I have already provided a solution for multivendor shops, and there is much work to be done elsewhere.
with regards