Firewall, a startup focused on blockchain infrastructure, has raised $3.7 million in pre-seed funding from investors including North Island Ventures and Breyer Capital. The funding will be used to develop the company's innovative finality consensus mechanism, which aims to eliminate smart contract exploits and enhance the security of smart contract networks. Firewall's technology introduces "programmable finality" to extend rollups and block harmful transactions using automated checkpoints. The company aims to create a community to "firewall the EVM" and make smart contract technology safe for everyday use.