M-01 MitigationConfirmed

[code423n4]

Lines of code

Vulnerability details

Original Issue

code-423n4/2023-06-angle-findings#40

Details

LibHelpers.piecewiseLinear() reverts when the value is less than the first element of the array.

Mitigation

PR: AngleProtocol/angle-transmuter@5f7635c

    function piecewiseLinear(uint64 x, uint64[] memory xArray, int64[] memory yArray) internal pure returns (int64) {
        uint256 indexLowerBound = findLowerBound(true, xArray, 1, x);
        if (indexLowerBound == 0 && x < xArray[0]) return yArray[0];
        else if (indexLowerBound == xArray.length - 1) return yArray[xArray.length - 1];
        return
            yArray[indexLowerBound] +
            ((yArray[indexLowerBound + 1] - yArray[indexLowerBound]) * int64(x - xArray[indexLowerBound])) /

During the mitigation, it outputs the first value of the y array when the value is less than the first element of the x array.

Conclusion

This issue was mitigated properly.

[c4-judge]

hansfriese marked the issue as satisfactory