A rather naïve belief many blockchain enthusiasts share is that code backed by blockchain fabric is self-sufficient. “Code is Law,” as they say. Unfortunately, reality has already proved this maxim wrong, because, well, code is written by people, and people are prone to making mistakes. Even when machines write code, it’s still likely to contain flaws: For example, the exploitation of the DAO smart contract eventually led to a hard fork of Ethereum Classic from Ethereum. This sort of trouble has happened more than once and with more than one blockchain.