OptiFi, a derivatives defi project, accidentally and permanently shut down the project smart contract, irretrievably locking up $661,000 — the project’s entire fund. A developer had been trying to push an update to the project, and ran into issues related to Solana network congestion (a recurring issue). While trying to clean up from a partially-executed transaction, the developer accidentally ran a command that closed the project’s primary smart contract.OptiFi has promised to return user deposits and settle all positions. In a post-mortem, they wrote that they had learned that “Every deployment needs a rigorous process and single point failure can be avoided. Please don’t rush like what we did, especially for defi projects”. They further outlined a “peer-surveillance approach” in which three people would be required to deploy any changes together. They also asked the Solana team to implement a two-step confirmation for such a potentially destructive command.