RunOpenCode / exchange-rate

        throw new ConfigurationException(sprintf('Source "%s" does not provide currency code "%s" for rate type "%s".', $this->getName(), $currencyCode, $rateType));

    }

    protected function validateRateType($rateType)

    {

        $knownTypes = array(

            'default', // It is actually a middle exchange rate

            'foreign_cache_buying',

            'foreign_cache_selling',

            'foreign_exchange_buying',

            'foreign_exchange_selling'

        );

        if (!in_array($rateType, $knownTypes, true)) {

            throw new UnknownRateTypeException(sprintf('Unknown rate type "%s" for source "%s", known types are: %s.', $rateType, $this->getName(), implode(', ', $knownTypes)));

        }

        return $this;

    }

    protected function validateCurrencyCode($currencyCode, $rateType)

    {

        return $this;

    }

    protected function validateCurrencyCode($currencyCode, $rateType)

    {

        $supports = array(

            'default' => array(

                'EUR'

            ),

            'foreign_cache_buying',

            'foreign_cache_selling',

            'foreign_exchange_buying',

            'foreign_exchange_selling'

        );

        if (!in_array($currencyCode, $supports[$rateType], true)) {

            throw new UnknownCurrencyCodeException(sprintf('Unknown currency code "%s".', $currencyCode));

        }

        return $this;

    }

    /**

     * @param \DateTime $date