update

cmd/cart/checkout_server.go

@@ -137,6 +137,12 @@ func (a *App) HandleCheckoutRequests(amqpUrl string, mux *http.ServeMux, invento
 			return
 		}
 
+		// Apply ConfirmationViewed mutation
+		cartId, ok := cart.ParseCartId(order.MerchantReference1)
+		if ok {
+			a.pool.Apply(r.Context(), uint64(cartId), &messages.ConfirmationViewed{})
+		}
+
 		w.Header().Set("Content-Type", "text/html; charset=utf-8")
 		if order.Status == "checkout_complete" {
 			http.SetCookie(w, &http.Cookie{