diff --git a/cmd/cart/main.go b/cmd/cart/main.go
index 6400d78..6c3a1e7 100644
--- a/cmd/cart/main.go
+++ b/cmd/cart/main.go
@@ -16,6 +16,7 @@ import (
 	"git.tornberg.me/go-cart-actor/pkg/cart"
 	"git.tornberg.me/go-cart-actor/pkg/discovery"
 	messages "git.tornberg.me/go-cart-actor/pkg/messages"
+	"git.tornberg.me/go-cart-actor/pkg/promotions"
 	"git.tornberg.me/go-cart-actor/pkg/proxy"
 	"git.tornberg.me/go-cart-actor/pkg/voucher"
 	"github.com/prometheus/client_golang/prometheus"
@@ -108,7 +109,25 @@ func main() {
 
 	controlPlaneConfig := actor.DefaultServerConfig()
 
+	promotionData, err := promotions.LoadStateFile("data/promotions.json")
+	if err != nil {
+		log.Printf("Error loading promotions: %v\n", err)
+	}
+
+	promotionService := promotions.NewPromotionService(nil)
+
 	reg := cart.NewCartMultationRegistry()
+	reg.RegisterProcessor(actor.NewMutationProcessor(func(g *cart.CartGrain) error {
+		ctx := promotions.NewContextFromCart(g)
+		_, actions := promotionService.EvaluateAll(promotionData.State.Promotions, ctx)
+		for _, action := range actions {
+			log.Printf("apply: %V", action)
+		}
+		return nil
+	}), actor.NewMutationProcessor(func(g *cart.CartGrain) error {
+		g.UpdateTotals()
+		return nil
+	}))
 	diskStorage := actor.NewDiskStorage[cart.CartGrain]("data", reg)
 	poolConfig := actor.GrainPoolConfig[cart.CartGrain]{
 		MutationRegistry: reg,
@@ -323,19 +342,7 @@ func main() {
 			w.WriteHeader(http.StatusBadRequest)
 		}
 		log.Printf("Klarna order validation: %s", order.ID)
-		//err = confirmOrder(order, orderHandler)
-		//if err != nil {
-		//	log.Printf("Error validating order: %v\n", err)
-		//	w.WriteHeader(http.StatusInternalServerError)
-		//	return
-		//}
-		//
-		//err = triggerOrderCompleted(err, syncedServer, order)
-		//if err != nil {
-		//	log.Printf("Error processing cart message: %v\n", err)
-		//	w.WriteHeader(http.StatusInternalServerError)
-		//	return
-		//}
+
 		w.WriteHeader(http.StatusOK)
 	})
 
diff --git a/pkg/actor/mutation_registry.go b/pkg/actor/mutation_registry.go
index 72b7f91..ca7d774 100644
--- a/pkg/actor/mutation_registry.go
+++ b/pkg/actor/mutation_registry.go
@@ -15,11 +15,32 @@ type ApplyResult struct {
 	Error    error         `json:"error,omitempty"`
 }
 
+type MutationProcessor interface {
+	Process(grain any) error
+}
+
+type BasicMutationProcessor[V any] struct {
+	processor func(any) error
+}
+
+func NewMutationProcessor[V any](process func(V) error) MutationProcessor {
+	return &BasicMutationProcessor[V]{
+		processor: func(v any) error {
+			return process(v.(V))
+		},
+	}
+}
+
+func (p *BasicMutationProcessor[V]) Process(grain any) error {
+	return p.processor(grain)
+}
+
 type MutationRegistry interface {
 	Apply(grain any, msg ...proto.Message) ([]ApplyResult, error)
 	RegisterMutations(handlers ...MutationHandler)
 	Create(typeName string) (proto.Message, bool)
 	GetTypeName(msg proto.Message) (string, bool)
+	RegisterProcessor(processor ...MutationProcessor)
 	//GetStorageEvent(msg proto.Message) StorageEvent
 	//FromStorageEvent(event StorageEvent) (proto.Message, error)
 }
@@ -27,6 +48,7 @@ type MutationRegistry interface {
 type ProtoMutationRegistry struct {
 	mutationRegistryMu sync.RWMutex
 	mutationRegistry   map[reflect.Type]MutationHandler
+	processors         []MutationProcessor
 }
 
 var (
@@ -114,9 +136,14 @@ func NewMutationRegistry() MutationRegistry {
 	return &ProtoMutationRegistry{
 		mutationRegistry:   make(map[reflect.Type]MutationHandler),
 		mutationRegistryMu: sync.RWMutex{},
+		processors:         make([]MutationProcessor, 0),
 	}
 }
 
+func (r *ProtoMutationRegistry) RegisterProcessor(processors ...MutationProcessor) {
+	r.processors = append(r.processors, processors...)
+}
+
 func (r *ProtoMutationRegistry) RegisterMutations(handlers ...MutationHandler) {
 	r.mutationRegistryMu.Lock()
 	defer r.mutationRegistryMu.Unlock()
@@ -198,6 +225,12 @@ func (r *ProtoMutationRegistry) Apply(grain any, msg ...proto.Message) ([]ApplyR
 		results = append(results, ApplyResult{Error: err, Type: rt.Name(), Mutation: m})
 	}
 
+	for _, processor := range r.processors {
+		err := processor.Process(grain)
+		if err != nil {
+			return results, err
+		}
+	}
 	return results, nil
 }
 
diff --git a/pkg/promotions/types.go b/pkg/promotions/types.go
index d23061e..17a684c 100644
--- a/pkg/promotions/types.go
+++ b/pkg/promotions/types.go
@@ -380,7 +380,7 @@ func WalkConditions(conds []Condition, fn func(c Condition) bool) {
 }
 
 type PromotionState struct {
-	Vouchers []PromotionRule `json:"promotions"`
+	Promotions []PromotionRule `json:"promotions"`
 }
 
 type StateFile struct {
@@ -389,7 +389,7 @@ type StateFile struct {
 }
 
 func (sf *StateFile) GetPromotion(id string) (*PromotionRule, bool) {
-	for _, v := range sf.State.Vouchers {
+	for _, v := range sf.State.Promotions {
 		if v.ID == id {
 			return &v, true
 		}
@@ -397,14 +397,14 @@ func (sf *StateFile) GetPromotion(id string) (*PromotionRule, bool) {
 	return nil, false
 }
 
-func LoadStateFile(fileName string) (*PromotionState, error) {
+func LoadStateFile(fileName string) (*StateFile, error) {
 	f, err := os.Open(fileName)
 	if err != nil {
 		return nil, err
 	}
 	defer f.Close()
 	dec := json.NewDecoder(f)
-	sf := &PromotionState{}
+	sf := &StateFile{}
 	err = dec.Decode(sf)
 	if err != nil {
 		return nil, err