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Using fixed length array as parameter type can avoid checks to save gas and improve consistency #59

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code423n4 opened this issue Nov 11, 2021 · 1 comment
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bug Something isn't working G (Gas Optimization) sponsor confirmed Sponsor agrees this is a problem and intends to fix it (OK to use w/ "disagree with severity")

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@code423n4
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WatchPug

Vulnerability details

https://github.com/code-423n4/2021-11-fairside/blob/20c68793f48ee2678508b9d3a1bae917c007b712/contracts/network/FSDNetwork.sol#L482-L495

function setAssessors(address[] calldata _assessors) external {
        require(
            msg.sender == GOVERNANCE_ADDRESS,
            "FSDNetwork::setAssessors: Insufficient Privileges"
        );

        uint256 assessorsLength = _assessors.length;
        require(
            assessorsLength == 3,
            "FSDNetwork::setAssessors: Number of assessors must be three"
        );

        assessors = _assessors;
    }

Recommendation

Change to:

function setAssessors(address[3] calldata _assessors) external {
        require(
            msg.sender == GOVERNANCE_ADDRESS,
            "FSDNetwork::setAssessors: Insufficient Privileges"
        );

        assessors = _assessors;
    }
@code423n4 code423n4 added bug Something isn't working G (Gas Optimization) labels Nov 11, 2021
code423n4 added a commit that referenced this issue Nov 11, 2021
@YunChe404 YunChe404 added the sponsor confirmed Sponsor agrees this is a problem and intends to fix it (OK to use w/ "disagree with severity") label Nov 14, 2021
@pauliax
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pauliax commented Nov 17, 2021

Great find, valid optimization.

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Labels
bug Something isn't working G (Gas Optimization) sponsor confirmed Sponsor agrees this is a problem and intends to fix it (OK to use w/ "disagree with severity")
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