KO
Great job on the explanation 👏🏽👏🏽👏🏽 I wanted to highlight a mistake on the initial code instead of pragma solidity ^0.8.7; you have pragma solidy ^0.8.7; so I think it should be // SPDX-License-Identifier: UNLICENSED pragma solidity ^ 0.8 .7 ; contract HelloWorld { function sayHello ( ) public pure returns ( string memory ) { return "Hello World!" ; } } I hope you found this helpful.