highLogic errorEVM-Solidity
Index Fun Order Book: Seller Pays Buyer's Trade Fee in Token Swaps, Leading to Systematic Theft of Funds
- Payout
- $0
- Protocol
- Index Fun Order Book
- Disclosed
- Oct 19, 2025
- Source
- sherlock
In the Index Fun Order Book, the token-swap settlement path (`_executeTokenSwap` and `_executeAgainstMatcher`) charges the buyer's trade fee out of the seller's payment proceeds instead of as an additional cost to the buyer. Because the fee rate is the buyer's …
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References
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