test a version

cmd/cart/main.go

@@ -106,7 +106,7 @@ func main() {
 			_, span := tracer.Start(ctx, "Totals and promotions")
 			defer span.End()
 			g.UpdateTotals()
-
+			g.Version++
 			// promotionCtx := promotions.NewContextFromCart(g, promotions.WithNow(time.Now()), promotions.WithCustomerSegment("vip"))
 			// _, actions := promotionService.EvaluateAll(promotionData.State.Promotions, promotionCtx)
 			// for _, action := range actions {

pkg/cart/cart-grain.go

@@ -108,6 +108,7 @@ type CartGrain struct {
 	lastAccess             time.Time
 	lastChange             time.Time // unix seconds of last successful mutation (replay sets from event ts)
 	userId                 string
+	Version                uint
 	InventoryReserved      bool                            `json:"inventoryReserved"`
 	Id                     CartId                          `json:"id"`
 	Items                  []*CartItem                     `json:"items"`