diff --git a/pkg/lru/define.go b/pkg/lru/define.go
index 98e82e2..4d05af5 100644
--- a/pkg/lru/define.go
+++ b/pkg/lru/define.go
@@ -1,6 +1,7 @@
 package lru
 
 import (
+	"gitee.com/timedb/wheatCache/pkg/proto"
 	"gitee.com/timedb/wheatCache/pkg/structure"
 	"sync"
 )
@@ -26,7 +27,8 @@ const (
 
 type CacheInterface interface {
 	Del() error
-	Get(key string) (structure.KeyBaseInterface, bool)
-	Add(key string, val structure.KeyBaseInterface)
+	Get(key *proto.BaseKey) (structure.KeyBaseInterface, bool)
+	Add(key *proto.BaseKey, val structure.KeyBaseInterface)
 	UpdateLruSize(length structure.UpdateLength)
-}
\ No newline at end of file
+	DelByKey(key *proto.BaseKey) error
+}