Function parse_rpi_book_msg 

pub fn parse_rpi_book_msg(
    msg: &OKXRpiBookMsg,
    instrument_id: InstrumentId,
    price_precision: u8,
    size_precision: u8,
    action: &OKXBookAction,
    ts_init: UnixNanos,
) -> Result<OrderBookDeltas>

Parses an RPI book message into Nautilus order book deltas.

Errors

Returns an error if a price or total quantity cannot be represented at the instrument precision.