docs: public BitbayBaseResponse transfer(Currency currency, BigDecimal quantity, String address) {
      BitbayBaseResponse resp =
          bitbayAuthenticated.transfer(
              apiKey,
              sign,
              exchange.getNonceFactory(),
              currency.getCurrencyCode(),
              quantity.toString(),
              address);
      if (resp.getMessage() != null) throw new ExchangeException(resp.getMessage());
      return resp;
    }