EIP-3074: AUTH and AUTHCALL opcodes

[axic]

An idea was posted to replace WETH with a mapping using EIP-3074:

Getting rid of WETH using EIP-3074

(Originally posted here.) While randomly looking at WETH I was wondering, Hmm, this was written such a long time ago, what would it look like with modern Solidity? WETH9 was written for 0.4.18 (2017!) and we are at 0.8.10 today. (@MrChico, what does 9 stands for?) So I started iteratively changing it, adding small improvements one-by-one: Turning those constants into actual constants Upgrading the syntax of the fallback function Adding the emit keyword to events Fine-tuning public into e…

This would require the “Ether transfer” functionality to be enabled in EIP-3074.