Module fees 

Account-owned fee schedules decoupled from instrument definitions.

Fee policy belongs to the execution runtime serving an account, not to the instrument. Two accounts can trade the same instrument with different fees without constructing different instrument definitions.

Structs

MakerTakerFeeRates

Explicit maker/taker fee rates as a fraction of notional value.

MakerTakerFeeSchedule

Account-owned maker/taker fee schedule with exact instrument overrides.

Functions

calculate_maker_taker_commission

Calculates maker/taker commission from an explicitly resolved fee rate.