Connect FREEKASSA to telegram bot from scratch

There is a ready-made telegram bot on aiogram, it remains to connect the freekassa payment system to it. Therefore, you only need a ready-made file with the following functions:
1) Which returns a payment link
2) To verify payment (true/false)

You will also need help with buying,creating and configuring a web server to process http requests. Without it, it is impossible to connect a telegram bot to freekassa.