/**
* @param PaymentInterface $payment
* @return HandlerInterface
* @throws InvalidPaymentException
*/
public function getPaymentHandler(PaymentInterface $payment)
{
$slug = $payment->getPaymentMethod()->getSlug();
if (!array_key_exists($slug, $this->handlers)) {
throw new InvalidPaymentException('Undefined payment method.');
}
return $this->handlers[$slug];
}
