Function parse_quote_tick 

pub fn parse_quote_tick(
    ticker: &KrakenWsTickerData,
    instrument: &InstrumentAny,
    ts_init: UnixNanos,
) -> Result<QuoteTick>

Parses Kraken WebSocket ticker data into a Nautilus quote tick.

Errors

Returns an error if:

• Bid or ask price/quantity cannot be parsed.