Kelvin Fichter

Optimism does a lot of stuff on-chain. Managing and monitoring the many on-chain interactions required to keep a system like this running can become a bit of a headache. This isn’t an impossible problem — but it’s enough of nuisance that it’s worth automating.

Solidity devs: meet Smock v2. The Solidity mocking library. A collaboration between Optimism and the fantastic team over at DeFi Wonderland. Smart contract testing has historically been… hard? If not hard, then just confusing. Way back in the early days of Solidity the best way to test a contract was

This is the story of our experience looking into a bug that caused our Optimistic Ethereum testnet deployment to stop accepting new L1 ⇒ L2 deposits for a period of several days in the early days of June 2021. For some context, L1 ⇒ L2 deposits take assets sitting on an L1