Method safe_currency_code

python/ccxt/async_support/kraken.py:908–917

(self, currencyId: Str, currency: Currency = None)

        })

    def safe_currency_code(self, currencyId: Str, currency: Currency = None) -> Str:
        if currencyId is None:
            return currencyId
        if currencyId.find('.') > 0:
            # if ID contains .M, .S or .F, then it can't contain X or Z prefix. in such case, ID equals to ALTNAME
            parts = currencyId.split('.')
            firstPart = self.safe_string(parts, 0)
            secondPart = self.safe_string(parts, 1)
            return super(kraken, self).safe_currency_code(firstPart, currency) + '.' + secondPart
        return super(kraken, self).safe_currency_code(currencyId, currency)

    async def fetch_trading_fee(self, symbol: str, params={}) -> TradingFeeInterface:
        """