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Optimism attacker rejects 18 million stolen OP tokens

 


A bad transfer with serious consequences cost the developers of the Ethereum Layer-2 solution 20 million Optimism tokens (OP) on June 9, with a value of around 35 million US dollars at the time.

As reported, the attacker took advantage of an error made by the liquidity provider Wintermute in synchronizing its Optimism L2 receiving address with the corresponding Ethereum L1 address.

Within 24 hours of Wintermute sharing his research results with the Optimism team, an anonymous hacker stole all 20 million OP tokens from said Ethereum L1 address.

The hacker initially sold 1 million OP tokens for Ether (ETH) and kept the other 19 million.

On Friday, June 10, the Optimism team then announced via Twitter that the attacker sent 17 million OP tokens back to an Optimism Foundation Ethereum address in a total of 17 transfers .

Before returning the 17 million OP tokens, the attacker sent an on-chain message and one million OP tokens to Ethereum co-founder Vitalik Buterin. In the message, the stranger asked Buterin to verify the Optimism receiving address and send the 1 million Optimism tokens to that address. As assured in the message to Buterin, the attacker then sent 17 million Optimism tokens to the previously verified OP receiving address, returning 18 of the 20 million OP tokens.

As a bonus, the attacker keeps a further 1 million OP tokens in addition to the OP tokens already exchanged in Ethereum.

The Optimism team announced that Wintermute will make up for the missing 2 million OP tokens.

After the announcement of the news, the OP price was able to recover by almost 20 percent to USD 0.98 in the meantime, but is now trading 20 percent lower again in the region of USD 0.80 in the course of the current overall market weakness.

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