update

pkg/cart/mutation_payment_declined.go

@@ -0,0 +1,16 @@
+package cart
+
+import (
+	"time"
+	messages "git.tornberg.me/go-cart-actor/pkg/messages"
+)
+
+func PaymentDeclined(grain *CartGrain, req *messages.PaymentDeclined) error {
+	grain.PaymentStatus = "declined"
+	grain.PaymentDeclinedAt = time.Now()
+	// Optionally clear checkout order if in progress
+	if grain.CheckoutOrderId != "" {
+		grain.CheckoutOrderId = ""
+	}
+	return nil
+}