Firewall is building the safety rails that enable the everyday person to use the next era of the Internet. Today, billions of dollars are stolen from users, through irreversible transactions that are classifiable as theft. There’s a parallel between the current state of crypto-networks and the early internet, with a similar lack of essential security infrastructure. Our focus is not on marginal improvements; rather, we bring a required paradigm shift in the usability of blockchains. We designed a solution from first principles, and created programmable finality. Fundamentally, we make exploits a concept of the past. We envision Firewall as a part of every smart contract network, acting as an embedded security system that intelligently guards against threats.