[Note: this is a companion article to our Lagrange Thesis video. Watch it here:] “It may be the largest exploit in DeFi history.“ At least that was how Coindesk introed their breaking news report on the Ronin Network suffering a $625M hack in March 2022. While Ronin wasn’t the first high-profile bridge exploit (Wormhole got hacked just a month earlier) nor the last (BNB bridge followed soon), it underpinned several innate flaws with k of n security assumptions. Not only do validator-based bri...