diff --git a/pkg/network/network.go b/pkg/network/network.go
index 9a8ec1d0..61fe6e40 100644
--- a/pkg/network/network.go
+++ b/pkg/network/network.go
@@ -7,6 +7,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/number571/go-peer/pkg/encoding"
 	"github.com/number571/go-peer/pkg/message/layer1"
 	"github.com/number571/go-peer/pkg/network/conn"
 	"github.com/number571/go-peer/pkg/storage/cache"
@@ -60,7 +61,8 @@ func (p *sNode) BroadcastMessage(pCtx context.Context, pMsg layer1.IMessage) err
 	}
 
 	// node can redirect received message
-	_ = p.fCacheSetter.Set(pMsg.GetHash(), []byte{})
+	hash := encoding.HexEncode(pMsg.GetHash())
+	_ = p.fCacheSetter.Set(hash, []byte{})
 
 	wg := sync.WaitGroup{}
 	wg.Add(lenConnections)
@@ -277,7 +279,8 @@ func (p *sNode) messageReader(
 // Returns true if the message was successfully redirected to the handler function
 // > or if the message already existed in the hash value store.
 func (p *sNode) handleMessage(pCtx context.Context, pConn conn.IConn, pMsg layer1.IMessage) bool {
-	if !p.fCacheSetter.Set(pMsg.GetHash(), []byte{}) {
+	hash := encoding.HexEncode(pMsg.GetHash())
+	if !p.fCacheSetter.Set(hash, []byte{}) {
 		return true // hash of message already in queue
 	}
 
diff --git a/pkg/storage/cache/cache_test.go b/pkg/storage/cache/cache_test.go
index 491e242f..6682f833 100644
--- a/pkg/storage/cache/cache_test.go
+++ b/pkg/storage/cache/cache_test.go
@@ -13,14 +13,14 @@ func TestLRUCache(t *testing.T) {
 
 	lruCache := NewLRUCache(3)
 
-	if _, ok := lruCache.Get([]byte("unknown-key")); ok {
+	if _, ok := lruCache.Get("unknown-key"); ok {
 		t.Error("success load unknown key")
 		return
 	}
 
 	for i := 0; i < 3; i++ {
 		key := encoding.Uint64ToBytes(uint64(i)) //nolint:gosec
-		if ok := lruCache.Set(key[:], []byte(fmt.Sprintf("_%d_", i))); !ok {
+		if ok := lruCache.Set(string(key[:]), []byte(fmt.Sprintf("_%d_", i))); !ok {
 			t.Errorf("failed push %d", i)
 			return
 		}
@@ -33,7 +33,7 @@ func TestLRUCache(t *testing.T) {
 	for i := 0; i < 3; i++ {
 		key := encoding.Uint64ToBytes(uint64(i)) //nolint:gosec
 		val, ok := lruCache.Get(
-			key[:],
+			string(key[:]),
 		)
 		if !ok {
 			t.Errorf("failed load %d", i)
@@ -51,14 +51,14 @@ func TestLRUCache(t *testing.T) {
 			break
 		}
 		key := encoding.Uint64ToBytes(i)
-		if !bytes.Equal(k, key[:]) {
+		if !bytes.Equal([]byte(k), key[:]) {
 			t.Error("got incorrect key")
 			return
 		}
 	}
 
 	key1 := encoding.Uint64ToBytes(1)
-	if ok := lruCache.Set(key1[:], []byte(fmt.Sprintf("_%d_", 1))); ok {
+	if ok := lruCache.Set(string(key1[:]), []byte(fmt.Sprintf("_%d_", 1))); ok {
 		t.Error("success push already exist value")
 		return
 	}
@@ -66,7 +66,7 @@ func TestLRUCache(t *testing.T) {
 	// start cycle of queue
 	i := uint64(4)
 	key2 := encoding.Uint64ToBytes(i)
-	if ok := lruCache.Set(key2[:], []byte(fmt.Sprintf("_%d_", i))); !ok {
+	if ok := lruCache.Set(string(key2[:]), []byte(fmt.Sprintf("_%d_", i))); !ok {
 		t.Errorf("failed push %d", i)
 		return
 	}
@@ -74,7 +74,7 @@ func TestLRUCache(t *testing.T) {
 	// try load init value
 	i = 0
 	key3 := encoding.Uint64ToBytes(i)
-	if _, ok := lruCache.Get(key3[:]); ok {
+	if _, ok := lruCache.Get(string(key3[:])); ok {
 		t.Errorf("success load rewrited value %d", i)
 		return
 	}
diff --git a/pkg/storage/cache/lru.go b/pkg/storage/cache/lru.go
index a2fa42dd..93fd41be 100644
--- a/pkg/storage/cache/lru.go
+++ b/pkg/storage/cache/lru.go
@@ -2,8 +2,6 @@ package cache
 
 import (
 	"sync"
-
-	"github.com/number571/go-peer/pkg/encoding"
 )
 
 var (
@@ -31,33 +29,32 @@ func (p *sLRUCache) GetIndex() uint64 {
 	return p.fIndex
 }
 
-func (p *sLRUCache) GetKey(i uint64) ([]byte, bool) {
+func (p *sLRUCache) GetKey(i uint64) (string, bool) {
 	p.fMutex.RLock()
 	defer p.fMutex.RUnlock()
 
 	if uint64(len(p.fQueue)) <= i {
-		return nil, false
+		return "", false
 	}
 
-	hash := encoding.HexDecode(p.fQueue[i])
-	return hash, len(hash) != 0
+	key := p.fQueue[i]
+	return key, len(key) != 0
 }
 
-func (p *sLRUCache) Get(pKey []byte) (interface{}, bool) {
+func (p *sLRUCache) Get(pKey string) (interface{}, bool) {
 	p.fMutex.RLock()
 	defer p.fMutex.RUnlock()
 
-	val, ok := p.fMap[encoding.HexEncode(pKey)]
+	val, ok := p.fMap[pKey]
 	return val, ok
 }
 
-func (p *sLRUCache) Set(pKey []byte, pValue interface{}) bool {
+func (p *sLRUCache) Set(pKey string, pValue interface{}) bool {
 	p.fMutex.Lock()
 	defer p.fMutex.Unlock()
 
 	// hash already exists in queue
-	key := encoding.HexEncode(pKey)
-	if _, ok := p.fMap[key]; ok {
+	if _, ok := p.fMap[pKey]; ok {
 		return false
 	}
 
@@ -65,8 +62,8 @@ func (p *sLRUCache) Set(pKey []byte, pValue interface{}) bool {
 	delete(p.fMap, p.fQueue[p.fIndex])
 
 	// push hash to queue
-	p.fQueue[p.fIndex] = key
-	p.fMap[key] = pValue
+	p.fQueue[p.fIndex] = pKey
+	p.fMap[pKey] = pValue
 
 	// increment queue index
 	p.fIndex = (p.fIndex + 1) % uint64(len(p.fQueue))
diff --git a/pkg/storage/cache/types.go b/pkg/storage/cache/types.go
index a238dbd2..8dee9c69 100644
--- a/pkg/storage/cache/types.go
+++ b/pkg/storage/cache/types.go
@@ -4,7 +4,7 @@ type ILRUCache interface {
 	ICache
 
 	GetIndex() uint64
-	GetKey(i uint64) ([]byte, bool)
+	GetKey(i uint64) (string, bool)
 }
 
 type ICache interface {
@@ -13,9 +13,9 @@ type ICache interface {
 }
 
 type ICacheSetter interface {
-	Set([]byte, interface{}) bool
+	Set(string, interface{}) bool
 }
 
 type ICacheGetter interface {
-	Get([]byte) (interface{}, bool)
+	Get(string) (interface{}, bool)
 }