In September 2022, Ethereum transitioned to proof-of-stake consensus, also known as The Merge. One of the changes this resulted in was the introduction of a new opcode called prevrandao, which replaces the difficulty opcode. As such, since Solidity 0.8.18 block.difficulty has been deprecated and instead, block.prevrandao should be used. This PR makes that change in the Lottery contract's source code.
In September 2022, Ethereum transitioned to proof-of-stake consensus, also known as The Merge. One of the changes this resulted in was the introduction of a new opcode called prevrandao, which replaces the
difficultyopcode. As such, since Solidity 0.8.18block.difficultyhas been deprecated and instead,block.prevrandaoshould be used. This PR makes that change in the Lottery contract's source code.