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Submission Details
Severity: low
Valid

Lack of Zero-Address Check

blockchainbard

Summary

The function setFeeReceiver does not prevent the owner from setting the _feeReceiver as the zero address. This could result in a loss of fees, as once the zero address is set as the feeReceiver, any fees transferred would be irrecoverable.

Vulnerability Details

The setFeeReceiver function, which is used to update the feeReceiver address, does not have a check to prevent the new feeReceiver from being the zero address. If the zero address is mistakenly or maliciously set as the feeReceiver, all subsequent transfers of fees to this address would be irrecoverable, effectively being burned.

Impact

If the zero address is set as the feeReceiver, any fees sent to the zero address are irrecoverable and effectively destroyed. This can result in a loss of income from fees.

Tools Used

Manual review of the smart contract code.

Recommendations

When updating the feeReceiver address, add a require statement to ensure that the new address is not the zero address. Here's an example of how you can add this check:

function setFeeReceiver(address _newFeeReceiver) external onlyOwner {
require(_newFeeReceiver != address(0), "Fee receiver cannot be the zero address");
feeReceiver = _newFeeReceiver;
}

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