Questions tagged [msg.sender]

A lot of contracts use require(msg.sender == tx.origin) What is the purpose of it? When should you add this code? What difference does it make if the msg.sender is not a tx.origin? And in which cases are msg.sender and tx.origin not the same…

So yeah, who is the msg.sender if a function calls another function within the same contract? contract A { function doSomething() { do2(); //msg.sender == the user } function do2() { //is msg.sender the user,…