more testing

cmd/cart/checkout_builder.go

@@ -69,7 +69,7 @@ func BuildCheckoutOrderPayload(grain *cart.CartGrain, meta *CheckoutMeta) ([]byt
 			Name:           it.Meta.Name,
 			Quantity:       it.Quantity,
 			UnitPrice:      int(it.Price.IncVat),
-			TaxRate:        2500, // TODO: derive if variable tax rates are introduced
+			TaxRate:        it.Tax, // TODO: derive if variable tax rates are introduced
 			QuantityUnit:   "st",
 			TotalAmount:    int(it.TotalPrice.IncVat),
 			TotalTaxAmount: int(it.TotalPrice.TotalVat()),

pkg/cart/cart-grain.go

@@ -30,13 +30,14 @@ type ItemMeta struct {
 }
 
 type CartItem struct {
-	Id          uint32      `json:"id"`
-	ItemId      uint32      `json:"itemId,omitempty"`
-	ParentId    *uint32     `json:"parentId,omitempty"`
-	Sku         string      `json:"sku"`
-	Price       Price       `json:"price"`
-	TotalPrice  Price       `json:"totalPrice"`
-	OrgPrice    *Price      `json:"orgPrice,omitempty"`
+	Id          uint32  `json:"id"`
+	ItemId      uint32  `json:"itemId,omitempty"`
+	ParentId    *uint32 `json:"parentId,omitempty"`
+	Sku         string  `json:"sku"`
+	Price       Price   `json:"price"`
+	TotalPrice  Price   `json:"totalPrice"`
+	OrgPrice    *Price  `json:"orgPrice,omitempty"`
+	Tax         int
 	Stock       StockStatus `json:"stock"`
 	Quantity    int         `json:"qty"`
 	Discount    *Price      `json:"discount,omitempty"`

pkg/cart/mutation_add_item.go

@@ -63,6 +63,7 @@ func AddItem(g *CartGrain, m *messages.AddItem) error {
 		ItemId:   uint32(m.ItemId),
 		Quantity: int(m.Quantity),
 		Sku:      m.Sku,
+		Tax:      int(taxRate * 100),
 		Meta: &ItemMeta{
 			Name:       m.Name,
 			Image:      m.Image,