/**
* Get exchange rate for a given currency.
*
* @param Currency $currency
* @return float
* @throws \InvalidArgumentException
*/
public function getRate(Currency $currency)
{
$code = $currency->getCode();
if (!isset($this->rates[$code])) {
throw new \InvalidArgumentException('Invalid currency code: ' . $code);
}
return (double) $this->rates[$code];
}
/**
* {@inheritDoc}
*/
public function getTransactions()
{
$this->__initializer__ && $this->__initializer__->__invoke($this, 'getTransactions', array());
return parent::getTransactions();
}