simpler rules

pkg/cart/cart-grain.go

@@ -92,10 +92,10 @@ type CartGrain struct {
 }
 
 type Voucher struct {
-	Code  string                  `json:"code"`
-	Rules []*messages.VoucherRule `json:"rules"`
-	Id    uint32                  `json:"id"`
-	Value int64                   `json:"value"`
+	Code  string   `json:"code"`
+	Rules []string `json:"rules"`
+	Id    uint32   `json:"id"`
+	Value int64    `json:"value"`
 }
 
 func (v *Voucher) AppliesTo(cart *CartGrain) ([]*CartItem, bool) {
@@ -127,8 +127,8 @@ func (v *Voucher) AppliesTo(cart *CartGrain) ([]*CartItem, bool) {
 	}
 
 	// All voucher rules must pass (logical AND)
-	for _, rule := range v.Rules {
-		expr := rule.GetCondition()
+	for _, expr := range v.Rules {
+
 		if expr == "" {
 			// Empty condition treated as pass (acts like a comment / placeholder)
 			continue