/**
* Checks if given Coupon is valid. To determine its validity, this service
* will evaluate all rules if there are any.
*
* @param CartInterface $cart Cart
* @param CouponInterface $coupon Coupon
*
* @return boolean Coupon is valid
*/
public function checkCouponValidity(CartInterface $cart, CouponInterface $coupon)
{
$rules = $coupon->getRules();
return $rules->forAll(function ($_, AbstractRuleInterface $rule) use($cart, $coupon) {
return $this->ruleManager->evaluateByRule($rule, ['cart' => $cart, 'coupon' => $coupon]);
});
}