Function is_resting_sp_bet 

pub fn is_resting_sp_bet(uo: &UnmatchedOrder) -> bool

Returns true if the unmatched order is an SP (on-close) bet resting until BSP reconciliation: execution-complete with no matched, cancelled, lapsed, or voided quantity and no lapse reason.

SP bets cannot be cancelled once placed, so this state is open, not terminal.