Unlucky MEV Bot Loses $12 Million Loan in Failed Sandwich Attack

不幸的 MEV 机器人在失败的三明治攻击中损失了 1200 万美元贷款

On September 5, blockchain analytics firm Arkham Intelligence reported an incident involving a Maximum Extractable Value (MEV) bot. The bot borrowed a staggering $11.97 million in Wrapped Ether (WETH) to execute a "sandwich attack" on a user attempting to trade Shuffle (SHFL) tokens worth approximately $5,000.

9 月 5 日，区块链分析公司 Arkham Intelligence 报告了一起涉及最大可提取价值 (MEV) 机器人的事件。该机器人借用了价值 1197 万美元的 Wrapped Ether (WETH)，对试图交易价值约 5,000 美元的 Shuffle (SHFL) 代币的用户执行“三明治攻击”。

The MEV bot engaged in a series of 14 transactions, borrowing and lending funds in USDC and WETH through DeFi platforms Aave and Uniswap. However, after completing the attack and covering gas fees, the bot managed to profit by a mere $20.

MEV 机器人进行了一系列 14 笔交易，通过 DeFi 平台 Aave 和 Uniswap 借入和借出 USDC 和 WETH 资金。然而，在完成攻击并支付汽油费后，该机器人仅获利 20 美元。

Arkham Intelligence provided data indicating that the entire transaction occurred within a single block, with the bot executing all transactions within 12 seconds.

Arkham Intelligence 提供的数据表明整个交易发生在一个区块内，机器人在 12 秒内执行了所有交易。

Mechanics of a Sandwich Attack

三明治攻击的机制

In a sandwich attack, an attacker intercepts a victim's transaction with two of their own transactions. The victim's transaction is placed in the mempool, where it awaits inclusion in a block. The attacker then submits a transaction with a high gas fee, ensuring it is processed first, and another with a lower gas fee, ensuring it is processed after the victim's transaction.

在三明治攻击中，攻击者用自己的两笔交易拦截受害者的交易。受害者的交易被放置在内存池中，等待被包含在区块中。然后，攻击者提交一笔燃气费较高的交易，确保首先处理该交易，然后提交另一笔燃气费较低的交易，确保在受害者的交易之后处理该交易。

The attacker exploits this manipulation by purchasing the victim's asset at a below-market price and selling it within the same block, profiting from the price difference minus gas fees.

攻击者利用这种操纵行为，以低于市场的价格购买受害者的资产，并在同一区块内出售，从差价减去汽油费中获利。

Previous Success of MEV Bots

MEV 机器人先前的成功

Despite the failure of this particular MEV bot, such bots have historically been lucrative for their operators. For example, in April 2023, the notorious MEV bot operator "jaredfromsubway" netted over $1 million in a week through sandwich attacks on PEPE and WOJAK memecoin traders.

尽管这个特定的 MEV 机器人失败了，但此类机器人历来对其运营商来说都是有利可图的。例如，2023 年 4 月，臭名昭著的 MEV 机器人运营商“jaredfromsubway”通过对 PEPE 和 WOJAK memecoin 交易者的三明治攻击，一周内获利超过 100 万美元。