Hacker Returns $15M of Stolen Optimism Funds, Sends 1M OP to Ethereum Founder

In a Twitter post, layer-2 blockchain protocol Optimism shared that the hacker who exploited a transfer error has refunded most of the stolen OP tokens as promised. This comes two days after the attack and less than a day since the attacker awarded 1 million coins to Ethereum co-founder Vitalik Buterin. Hacker Withholds 2 Million OP Tokens The hacker returned only 17M tokens, worth roughly $15 million; this falls 3M short of the stolen 20 million. According to information on…