fix: deal with custom .skip-open prefix on domain param also for kit discounts

Author: leomp12

functions/lib/helpers.js

@@ -73,17 +73,16 @@ const getValidDiscountRules = (discountRules, params, itemsForKit) => {
       if (!rule || !validateCustomerId(rule, params)) {
         return false
       }
+      const isKitDiscount = Array.isArray(itemsForKit) &&
+        (Array.isArray(rule.product_ids) || (Array.isArray(rule.category_ids)))
       if (rule.domain && rule.domain !== params.domain) {
         if (params.domain === `${rule.domain}.skip-open`) {
-          if (checkOpenPromotion(rule)) return false
+          if (isKitDiscount || checkOpenPromotion(rule)) return false
         } else {
           return false
         }
       }
-      if (
-        Array.isArray(itemsForKit) &&
-        (Array.isArray(rule.product_ids) || (Array.isArray(rule.category_ids)))
-      ) {
+      if (isKitDiscount) {
         const checkProductId = item => {
           if (
             !(rule.product_ids && rule.product_ids.length) &&