ChainCatcher news, according to The Block, security infrastructure company Firewall has completed a $3.7 million Pre-Seed funding round, led jointly by North Island Ventures, Breyer Capital, and Hack VC. The funds raised will be used to expand the current team of six full-time employees, develop technology, and support community building and marketing efforts.Firewall is developing firewall solutions for blockchain networks to prevent smart contract vulnerabilities.