pub fn instrument_fee_exponent(instrument: &InstrumentAny) -> Result<Decimal>Expand description
Returns the fee-schedule exponent for a Polymarket instrument. Polymarket
stores the exponent as a decimal string in info.fee_schedule.exponent at parse
time. This reader also accepts legacy numeric metadata. Defaults to 1 when the schedule
is absent so the fee curve degenerates to the simple fee = C * rate * p * (1 - p) form
used by compute_commission.
ยงErrors
Returns an error if a present schedule has a missing, invalid, or negative exponent.