Hi guys how can I prevent some contract from depositing to my contract? Meaning only user could deposit.

require msg.sender == tx.origin

There is a method from opezeppelin contracts in library Address, called isContract

Check if the address has a creation code. But know that contracts during construction have no codes either. Openzeppelin has Address library but be sure to go through the notes.

Thx I'll take a look

Was my idea but it can be exploited

However I'm going to check this beside other criterias just for deposit function. So it's not a big risk at all.

you can also use tx.origin

If its just for prevention, use the tx.origin. For detection, isContract is better

tx.origin breaks some security patterns though

I'm going to use isContract

tx.origin could be bypassed with constructor =)

could u show an example?

nvm sorry, i confused it with another issue

anyway, found an interesting topic
https://docs.soliditylang.org/en/v0.4.24/security-considerations.html#tx-origin
https://ethereum.stackexchange.com/questions/15641/how-does-a-contract-find-out-if-another-address-is-a-contract