gas.md

Unneeded zero address check in PirexGmx.depositGlp function

The token parameter is checked to guard against the zero address, but then the same parameter is validated using a list of whitelisted addresses, which should also cover the zero address check.

Use immutable variable for stakedGlp token in AutoPxGlp contract

The implementation of depositFsGlp fetches the stakedGlp token in every call using the PirexGmx contract (platform). Since this is a fixed token from the GMX protocol, consider using an immutable variable defined at construction time.

Use an infinite approve for the stakedGlp token in the AutoPxGlp contract

The function depositFsGlp will approve the spending for the given amount in every call. Consider adding an infinite approval during contract construction, similar to how it's done with the gmxBaseReward token.

Duplicated call to totalAssets() in compound function of AutoPxGmx contract

The function fetches the total amount of assets in line 288 (in the if condition) and does the same calculation in line 290 (asset.balanceOf(address(this)) - assetsBeforeClaim).

pxGmx token can be an immutable variable in the PxGmxReward contract

The pxGmx variable is defined at construction and can't be modified by the contract. Consider using an immutable variable to save gas.