Submission Details
Severity:
Zero-value ERC20 token transfers can revert for certain tokens
Summary
Certain erc20 token does not support zero value transfer.
Vulnerability Details
Some ERC20 tokens revert for zero-value transfers (e.g. LEND). If used as a fee and a small strike price, the fee token transfer will revert.
Impact
ERC20 tokens assets and the strike for zero value transfer cannot be withdrawn and remain locked in the contract.
Tools Used
Manual code Review
Recommendations
Implement a simple check for ensuring value transfer to be always > 0.
Prize pool breakdown
Total prize
20,000 USDC
nSLOC
70628 USDC / LOC
18,000 USDC
2,000 USDC
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