Optimism token was attacked earlier this week after the team announced that 20 million OP tokens were stolen. On Friday, the attacker behind the theft returned 17 million tokens. For returning the tokens, the attacker was rewarded with 2 million of the tokens. The funds were returned over the course of 17 transactions to an address belonging to Optimism, the Ethereum rollup provider.
Before the return of the tokens, the attacker sent an on-chain message to Vitalik Buterin, Ethereum co-founder, intimating him of their intention to return the full 18 million OP in their possession.
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