stop multiple usage? Firstly I wanna do smth like this address => signature, but It can hold only last signature. So there is a way to cheap storage for signature or how to do it organize properly?
It's unclear what you mean. You want to allow the user to only submit a signature once and never again, or you want to just track the last signature that was used?
I wanna track all signature are used. So there is no chance to get back with old signature and claim money once again... for now I have a mappting(signature => bool) it works as expected. But probably there is another way to do it?
Обсуждают сегодня