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Crypto trader lost nearly all of $50 million in one botched DeFi transaction

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Crypto trader lost nearly all of $50 million in one botched DeFi transaction

A crypto user lost roughly $50 million in a single transaction on Thursday after executing a large token swap that triggered massive slippage.

Blockchain data shows that the wallet attempted to swap $50,432,688 aEthUSDT – an interest-bearing token representing Tether’s USDT stablecoin deposited into the Aave decentralized lending protocol on the Ethereum network – for aEthAAVE – similar version of Aave governance tokens – through the CoW Protocol.

The transaction executed with more than 99% slippage due to thin liquidity in the relevant trading pools, leaving the wallet with only about 327 aEthAAVE tokens, worth roughly $36,000 after the trade. The difference of the value was quickly captured by arbitrage traders and network intermediaries.

Large losses caused by slippage occasionally occur in decentralized finance (DeFi) when traders attempt to execute unusually large orders against shallow liquidity pools. In such cases, automated arbitrage systems rapidly exploit the price dislocations created by the trade.

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Stani Kulechov, founder of the Aave protocol, said the trade went through despite multiple warnings presented to the user before confirming the transaction.

“Earlier today, a user attempted to buy AAVE using $50M USDT through the Aave interface,” Kulechov said in an X post. “Given the unusually large size of the single order, the interface warned the user about extraordinary slippage and required confirmation via a checkbox.”

According to Kulechov, the user accepted the warning on their mobile device and proceeded with the trade, explicitly acknowledging the risk of high slippage.

“The transaction could not be moved forward without the user explicitly accepting the risk,” he said, adding that the CoW Swap routers functioned as intended and followed standard industry practices.

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Still, the outcome was “clearly far from optimal,” Kulechov said.

Kulechov said Aave plans to contact the affected user and return roughly $600,000 in fees collected from the transaction.

The loss comes just few days after about $27 million was liquidated on Aave, in what some market participants say may have been caused by a temporary pricing issue involving the token wstETH.

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Crypto World

Democrats Promise to Oversee Reported DOJ Probe Into Binance

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Democrats Promise to Oversee Reported DOJ Probe Into Binance

A group of Democratic senators say they will oversee a reported Justice Department investigation into possible Iran-related sanctions violations on the crypto exchange Binance.

Senators Chris Van Hollen, Elizabeth Warren and Ruben Gallego said in a joint statement on Thursday that they “will conduct oversight to ensure the Department of Justice conducts a serious investigation into Binance and holds the company accountable for any wrongdoing.”

The Wall Street Journal reported on Wednesday, citing people familiar with the matter, that the Justice Department was investigating Iran’s possible use of Binance to evade sanctions.

“Binance has an established track record of putting profits ahead of the law,” the senators said, adding that the report raised “serious concerns that the firm is again violating US sanctions laws, recklessly helping bankroll the activities of terrorist groups connected to Iran.”

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Binance did not immediately respond to a request for comment, but a company spokesperson previously told Cointelegraph it was “not aware of any investigations. But as always, we are collaborating with regulators and law enforcement to investigate the facts.

The senators said that last month, they asked US Treasury Secretary Scott Bessent and US Attorney General Pam Bondi to investigate Binance over concerns about the movement of Iran-linked funds.

Binance filed defamation suit against WSJ

Binance sued the Wall Street Journal on Wednesday, claiming a report it published on Feb. 23 was defamatory.

The report said that Binance fired staff who flagged $1 billion worth of crypto tied to sanctioned Iranian entities, including Yemen’s Houthis and the Islamic Revolutionary Guard Corps.

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Binance denied that it had stopped any investigation and said the Wall Street Journal’s report was false. 

Related: Binance claims ‘full and complete legal victory‘ in Alabama court

Binance had pleaded guilty in November 2023 to violating US anti-money-laundering and sanctions laws, paying a record $4.3 billion fine and agreeing to operate under US oversight.