pub fn compute_fill_greeks_sync<F>(
spot_prices: &HashMap<String, Decimal>,
iv_lookup: F,
symbol: &str,
size: Decimal,
taker_side: Side,
timestamp_ms: u64,
) -> Option<(f64, f64)>Expand description
Compute fill delta and vega from engine-owned spot state and a pure IV lookup.
Returns None when critical option market data is missing or invalid. Callers
must fail closed when None is returned.