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Yoichi Hirai has built a formal definition of the EVM in Coq which makes it possible to produce formal proofs of an Ethereum smart contract's correctness: http

• SomeStupidPoint 10y ago
  Thanks for showing me this! I either missed it or it didn't exist last time I looked in to ETH. (About a year ago, pre-DAO.) Either way, this is a major component of what I'd like to see in smart contracts! (The other two major pieces being a verified VM that supports that spec, and a developer library of "standard" contract pieces -- I don't recall being impressed by directly coding for the EVM, and easy-to-use contracts require a library of "standard legalese".) Glad to see ETH is putting in the effort.
  • Jabanga 10y ago
    Most welcome! It was just released so you wouldn't have seen it last year. There was a major push toward more secure smart contacts, in particular using formal verification, after the DAO hack, and the efforts continue to this day.
    • pirapira 10y ago
      Using my definition of EVM, I think it's already possible to create a small verified compiler. My priority is on keeping the formal definition in sync with the Yellow Paper and the implementations.
      • Jabanga 10y ago
        It's a surprise to see you here! :) Thanks for the explanation. Good luck with your work!