Sparkn

Summary

Some ERC20 tokens would revert on zero value transfers.

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ERC20 tokens assets and the strike for zero value transfer cannot be withdrawn and remain locked in the contract.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.