YO Protocol's an abnormal Swap event reveals DeFi trading traps

ZkSnarker · 2026-01-13T14:38:12+00:00

A DeFi trading mistake occurred on Ethereum, where $3.84 million worth of stkGHO in the YO Protocol trade was only exchanged for 122,000 USDC. The error was caused by improper transaction parameter settings and routing issues, leading to slippage protection failure and high fee losses. This incident serves as a reminder to pay attention to details in DeFi transactions.

ZkSnarker

2026-01-13 14:38:12

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【Blockchain Rhythm】A typical DeFi trading mistake occurred on Ethereum. In a transaction by YO Protocol, approximately $3.84 million worth of stkGHO was ultimately exchanged for only 122,000 USDC. What exactly went wrong behind this huge price gap?

The YO Protocol team responded quickly afterward—buying back GHO tokens and re-depositing stkGHO into the vault in an attempt to fix the loss. According to BlockSec’s analysis, this incident was not caused by a single factor but by the combination of two errors.

First, there was a misconfiguration of the transaction parameters. The initiator provided problematic output quotes, or the slippage parameters were not set properly. This basic mistake directly caused the slippage protection to become ineffective—the defensive line meant to protect traders completely failed.

Even more problematic was the routing issue. The executePath parameter was configured abnormally, leading the transaction to be directed to liquidity pools with outrageously high fee tiers and extremely thin liquidity. As a result—large fees were wiped out, and price impact exploded.

This incident serves as a vivid reminder: even in complex DeFi transactions, neglecting parameter details can lead to devastating consequences.

ETH3,49%

USDC-0,05%

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ForumMiningMaster

· 6h ago

Another basic mistake... Losing 3.84 million to get 120,000, you must not be paying attention to slippage. --- You didn't choose the correct swap route, right? I was saying these small protocols are easy to get caught by pitfalls. --- What about the details? What did they say afterward? The story is only half told. --- Oh no, was MEV exploited again? Or is it really a liquidity trap? --- stkGHO was already hard to exit, no wonder it blew up.

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StakeWhisperer

· 6h ago

3.84 million tokens exchanged for 122,000, how outrageous is that? Did the slippage just skyrocket?

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BitcoinDaddy

· 6h ago

Damn, 3.84 million turned into 120,000? How outrageous is that slippage, resulting in a huge loss... Is there a bug in the smart contract or did we choose the wrong routing?

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StakeHouseDirector

· 6h ago

3.84 million to 120,000? What kind of slippage is that? The contract must be written incorrectly, right?

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On-ChainDiver

· 6h ago

Wow, 3.84 million to 122,000? That's so terrible... There must be a bug in some contract logic, causing the slippage to explode directly.

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LiquidatedNotStirred

· 6h ago

Damn, 3.84 million instantly evaporated into 120,000. How outrageous is this slippage... What's going on with YO Protocol? Is there a bug in the contract or has the liquidity pool been drained?

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