Feature: pay directly for each order

[yayitazale]

Describe the proposed feature

Hi

First of all, thanks for your work I think this is a super nice project.

I wish to be able to switch from the actual system of adding funds before making orders to a typical system of paying just the amount of each order at the chekout.

I'm not a python expert but I'll start reviewing the code to see if I can helpt with pull requests.

Thanks

Reasoning

Adding funds can be nice for periodic payments systems, but the usual way to make payments in online stores is to pay on the checkout only for the order amount.

Additional information

No response

[waring192]

I would also like the option. Just for the bot to give out a pre-defined list of Bitcoin or Monero addresses,