diff --git a/pkg/storage/cache/cache_test.go b/pkg/storage/cache/cache_test.go
index 75f125b2..491e242f 100644
--- a/pkg/storage/cache/cache_test.go
+++ b/pkg/storage/cache/cache_test.go
@@ -39,7 +39,7 @@ func TestLRUCache(t *testing.T) {
 			t.Errorf("failed load %d", i)
 			return
 		}
-		if !bytes.Equal(val, []byte(fmt.Sprintf("_%d_", i))) {
+		if !bytes.Equal(val.([]byte), []byte(fmt.Sprintf("_%d_", i))) {
 			t.Errorf("value is incorrect %d", i)
 			return
 		}
diff --git a/pkg/storage/cache/lru.go b/pkg/storage/cache/lru.go
index 3cb5005e..a2fa42dd 100644
--- a/pkg/storage/cache/lru.go
+++ b/pkg/storage/cache/lru.go
@@ -12,7 +12,7 @@ var (
 
 type sLRUCache struct {
 	fMutex sync.RWMutex
-	fMap   map[string][]byte
+	fMap   map[string]interface{}
 	fQueue []string
 	fIndex uint64
 }
@@ -20,7 +20,7 @@ type sLRUCache struct {
 func NewLRUCache(pCapacity uint64) ILRUCache {
 	return &sLRUCache{
 		fQueue: make([]string, pCapacity),
-		fMap:   make(map[string][]byte, pCapacity),
+		fMap:   make(map[string]interface{}, pCapacity),
 	}
 }
 
@@ -43,7 +43,7 @@ func (p *sLRUCache) GetKey(i uint64) ([]byte, bool) {
 	return hash, len(hash) != 0
 }
 
-func (p *sLRUCache) Get(pKey []byte) ([]byte, bool) {
+func (p *sLRUCache) Get(pKey []byte) (interface{}, bool) {
 	p.fMutex.RLock()
 	defer p.fMutex.RUnlock()
 
@@ -51,13 +51,13 @@ func (p *sLRUCache) Get(pKey []byte) ([]byte, bool) {
 	return val, ok
 }
 
-func (p *sLRUCache) Set(pKey, pValue []byte) bool {
+func (p *sLRUCache) Set(pKey []byte, pValue interface{}) bool {
 	p.fMutex.Lock()
 	defer p.fMutex.Unlock()
 
 	// hash already exists in queue
-	hexKey := encoding.HexEncode(pKey)
-	if _, ok := p.fMap[hexKey]; ok {
+	key := encoding.HexEncode(pKey)
+	if _, ok := p.fMap[key]; ok {
 		return false
 	}
 
@@ -65,8 +65,8 @@ func (p *sLRUCache) Set(pKey, pValue []byte) bool {
 	delete(p.fMap, p.fQueue[p.fIndex])
 
 	// push hash to queue
-	p.fQueue[p.fIndex] = hexKey
-	p.fMap[hexKey] = pValue
+	p.fQueue[p.fIndex] = key
+	p.fMap[key] = 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 2c7f3fd8..a238dbd2 100644
--- a/pkg/storage/cache/types.go
+++ b/pkg/storage/cache/types.go
@@ -13,9 +13,9 @@ type ICache interface {
 }
 
 type ICacheSetter interface {
-	Set([]byte, []byte) bool
+	Set([]byte, interface{}) bool
 }
 
 type ICacheGetter interface {
-	Get([]byte) ([]byte, bool)
+	Get([]byte) (interface{}, bool)
 }