Function parse_bar 

pub fn parse_bar(
    ohlc: &OhlcData,
    instrument: &InstrumentAny,
    bar_type: BarType,
    ts_init: UnixNanos,
) -> Result<Bar>

Parses a Kraken OHLC entry into a Nautilus bar.

Errors

Returns an error if:

• OHLC values cannot be parsed.
• Timestamp is invalid.