metamask

I'm studying a bit about jwt and saw that as best practice is preferable to store the jwt into the cookies instead than on local storage due to security reason, would be great to have this implemented here.
Just for learning prupose i link a guide that i used on how to implement it

https://dev.to/franciscomendes10866/using-cookies-with-jwt-in-node-js-8fn

1. Should validate that attofil is number (not decimal)
2. Should check if sufficient amount is being sent (not more than balance) otherwise send is throwing and estimating gas
3. Connected with 2, check if max amount should deduct gas too.