Summary

Protocol don't support some tokens will cause LibFertilizer#addFertilizer function revert.

Vulnerability Details

When call LibFertilizer#addFertilizer function, it call IERC20(barnRaiseToken).approve(barnRaiseWell, uint256(tokenAmountIn)) directly, some tokens like USDT will revert by calling approve function from non-zero to non-zero, see code detail.

Impact

Protocol will revert when call LibFertilizer#addFertilizer function with some tokens like USDT.

Tools Used

vscode, Manual Review

Recommendations

Call IERC20(barnRaiseToken).approve(barnRaiseWell, 0) before call IERC20(barnRaiseToken).approve(barnRaiseWell, uint256(tokenAmountIn)).