Submission Details
Severity:
Redundant assingment of value in function burn() in DebtToken.sol
Summary
The line inside the if block does nothing and should be removed, and has no effect on the execution of the function.
Vulnerability Details
The line amount = amount is redundant.
function burn(
address from,
uint256 amount,
uint256 index
) external override onlyReservePool returns (uint256, uint256, uint256, uint256) {
if (from == address(0)) revert InvalidAddress();
if (amount == 0) {
return (0, totalSupply(), 0, 0);
}
uint256 userBalance = balanceOf(from);
uint256 balanceIncrease = 0;
if (_userState[from].index != 0 && _userState[from].index < index) {
uint256 borrowIndex = ILendingPool(_reservePool).getNormalizedDebt();
balanceIncrease = userBalance.rayMul(borrowIndex) - userBalance.rayMul(_userState[from].index);
amount = amount; //@audit-info : This is redundant, amount is already defined
}
_userState[from].index = index.toUint128();
if(amount > userBalance){
amount = userBalance;
}
uint256 amountScaled = amount.rayDiv(index);
if (amountScaled == 0) revert InvalidAmount();
_burn(from, amount.toUint128());
emit Burn(from, amountScaled, index);
return (amount, totalSupply(), amountScaled, balanceIncrease);
}
Impact
Redundant assignment
Tools Used
Manual Review
Recommendations
Simply remove line 17 :
amount = amount;
Prize pool breakdown
Total prize
77,280 USDC
nSLOC
3,86420
USDC / LOC
74,000
3,280
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