What is the ruling on trade between jinn and humans, such as selling something to jinn, and what is the ruling on summoning jinn?

We do not know what benefit there is in prohibiting buying and selling from these committees, but it is better not to deal with them, for they steal money, deceive, and lie. As for summoning jinn in the prevalent understanding nowadays, it is an act of sorcerers, and it was not known from the Salaf.