Submission Details
Severity:
No incentive for manager to liquidate dust amount
Vulnerability Details
When borrow token, user can borrow with any amount that must be > 0 only:
function borrow(uint256 amount) external nonReentrant whenNotPaused onlyValidAmount(amount) { //@idea dust amount
if (isUnderLiquidation[msg.sender]) revert CannotBorrowUnderLiquidation();
UserData storage user = userData[msg.sender];
uint256 collateralValue = getUserCollateralValue(msg.sender);
if (collateralValue == 0) revert NoCollateral();
. . . . . .
}
modifier onlyValidAmount(uint256 amount) {
if (amount == 0) revert InvalidAmount(); // <--
_;
}
So if NFT token and borrow token is small, calling liquidation will cost more token than gas fee, lead to no incentive to liquidate them.
Impact
Bad debt for protocol when do not liquidate them, and no incentive to liquidate
Recommendations
Minimum borrow amount should be significant amount, not just > 0
Prize pool breakdown
Total prize
77,280 USDC
nSLOC
3,86420
USDC / LOC
74,000
3,280
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