diff --git a/structure/proto/base.pb.go b/pkg/proto/base.pb.go
similarity index 63%
rename from structure/proto/base.pb.go
rename to pkg/proto/base.pb.go
index 0553add..7e14747 100644
--- a/structure/proto/base.pb.go
+++ b/pkg/proto/base.pb.go
@@ -9,6 +9,7 @@ package proto
 import (
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	timestamppb "google.golang.org/protobuf/types/known/timestamppb"
 	reflect "reflect"
 	sync "sync"
 )
@@ -25,8 +26,9 @@ type BaseKey struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Key string `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
-	Ttl int64  `protobuf:"varint,2,opt,name=ttl,proto3" json:"ttl,omitempty"`
+	Key    string                 `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
+	Ttl    int64                  `protobuf:"varint,2,opt,name=ttl,proto3" json:"ttl,omitempty"`
+	Expire *timestamppb.Timestamp `protobuf:"bytes,3,opt,name=expire,proto3" json:"expire,omitempty"`
 }
 
 func (x *BaseKey) Reset() {
@@ -75,15 +77,27 @@ func (x *BaseKey) GetTtl() int64 {
 	return 0
 }
 
+func (x *BaseKey) GetExpire() *timestamppb.Timestamp {
+	if x != nil {
+		return x.Expire
+	}
+	return nil
+}
+
 var File_base_proto protoreflect.FileDescriptor
 
 var file_base_proto_rawDesc = []byte{
-	0x0a, 0x0a, 0x62, 0x61, 0x73, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x2d, 0x0a, 0x07,
-	0x42, 0x61, 0x73, 0x65, 0x4b, 0x65, 0x79, 0x12, 0x10, 0x0a, 0x03, 0x6b, 0x65, 0x79, 0x18, 0x01,
-	0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x6b, 0x65, 0x79, 0x12, 0x10, 0x0a, 0x03, 0x74, 0x74, 0x6c,
-	0x18, 0x02, 0x20, 0x01, 0x28, 0x03, 0x52, 0x03, 0x74, 0x74, 0x6c, 0x42, 0x11, 0x5a, 0x0f, 0x73,
-	0x74, 0x72, 0x75, 0x63, 0x74, 0x75, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x06,
-	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+	0x0a, 0x0a, 0x62, 0x61, 0x73, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x1f, 0x67, 0x6f,
+	0x6f, 0x67, 0x6c, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2f, 0x74, 0x69,
+	0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x61, 0x0a,
+	0x07, 0x42, 0x61, 0x73, 0x65, 0x4b, 0x65, 0x79, 0x12, 0x10, 0x0a, 0x03, 0x6b, 0x65, 0x79, 0x18,
+	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x6b, 0x65, 0x79, 0x12, 0x10, 0x0a, 0x03, 0x74, 0x74,
+	0x6c, 0x18, 0x02, 0x20, 0x01, 0x28, 0x03, 0x52, 0x03, 0x74, 0x74, 0x6c, 0x12, 0x32, 0x0a, 0x06,
+	0x65, 0x78, 0x70, 0x69, 0x72, 0x65, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1a, 0x2e, 0x67,
+	0x6f, 0x6f, 0x67, 0x6c, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2e, 0x54,
+	0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x52, 0x06, 0x65, 0x78, 0x70, 0x69, 0x72, 0x65,
+	0x42, 0x0b, 0x5a, 0x09, 0x70, 0x6b, 0x67, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x06, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -100,14 +114,16 @@ func file_base_proto_rawDescGZIP() []byte {
 
 var file_base_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
 var file_base_proto_goTypes = []interface{}{
-	(*BaseKey)(nil), // 0: BaseKey
+	(*BaseKey)(nil),               // 0: BaseKey
+	(*timestamppb.Timestamp)(nil), // 1: google.protobuf.Timestamp
 }
 var file_base_proto_depIdxs = []int32{
-	0, // [0:0] is the sub-list for method output_type
-	0, // [0:0] is the sub-list for method input_type
-	0, // [0:0] is the sub-list for extension type_name
-	0, // [0:0] is the sub-list for extension extendee
-	0, // [0:0] is the sub-list for field type_name
+	1, // 0: BaseKey.expire:type_name -> google.protobuf.Timestamp
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
 }
 
 func init() { file_base_proto_init() }
diff --git a/storage/proto/storage.pb.go b/pkg/proto/storage.pb.go
similarity index 75%
rename from storage/proto/storage.pb.go
rename to pkg/proto/storage.pb.go
index 2440907..4187ebc 100644
--- a/storage/proto/storage.pb.go
+++ b/pkg/proto/storage.pb.go
@@ -29,9 +29,9 @@ type Comm struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Key       string   `protobuf:"bytes,1,opt,name=key,proto3" json:"key,omitempty"`
-	Operation string   `protobuf:"bytes,2,opt,name=Operation,proto3" json:"Operation,omitempty"`
-	Option    []string `protobuf:"bytes,3,rep,name=Option,proto3" json:"Option,omitempty"`
+	// Types that are assignable to CommOption:
+	//	*Comm_StringComm
+	CommOption isComm_CommOption `protobuf_oneof:"comm_option"`
 }
 
 func (x *Comm) Reset() {
@@ -66,27 +66,30 @@ func (*Comm) Descriptor() ([]byte, []int) {
 	return file_storage_proto_rawDescGZIP(), []int{0}
 }
 
-func (x *Comm) GetKey() string {
-	if x != nil {
-		return x.Key
-	}
-	return ""
-}
-
-func (x *Comm) GetOperation() string {
-	if x != nil {
-		return x.Operation
-	}
-	return ""
-}
-
-func (x *Comm) GetOption() []string {
-	if x != nil {
-		return x.Option
+func (m *Comm) GetCommOption() isComm_CommOption {
+	if m != nil {
+		return m.CommOption
 	}
 	return nil
 }
 
+func (x *Comm) GetStringComm() *StringxComm {
+	if x, ok := x.GetCommOption().(*Comm_StringComm); ok {
+		return x.StringComm
+	}
+	return nil
+}
+
+type isComm_CommOption interface {
+	isComm_CommOption()
+}
+
+type Comm_StringComm struct {
+	StringComm *StringxComm `protobuf:"bytes,1,opt,name=string_comm,json=stringComm,proto3,oneof"`
+}
+
+func (*Comm_StringComm) isComm_CommOption() {}
+
 type CommendRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -184,24 +187,24 @@ func (x *CommendResponse) GetResult() []string {
 var File_storage_proto protoreflect.FileDescriptor
 
 var file_storage_proto_rawDesc = []byte{
-	0x0a, 0x0d, 0x73, 0x74, 0x6f, 0x72, 0x61, 0x67, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22,
-	0x4e, 0x0a, 0x04, 0x43, 0x6f, 0x6d, 0x6d, 0x12, 0x10, 0x0a, 0x03, 0x6b, 0x65, 0x79, 0x18, 0x01,
-	0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x6b, 0x65, 0x79, 0x12, 0x1c, 0x0a, 0x09, 0x4f, 0x70, 0x65,
-	0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x09, 0x4f, 0x70,
-	0x65, 0x72, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x12, 0x16, 0x0a, 0x06, 0x4f, 0x70, 0x74, 0x69, 0x6f,
-	0x6e, 0x18, 0x03, 0x20, 0x03, 0x28, 0x09, 0x52, 0x06, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x22,
-	0x33, 0x0a, 0x0e, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73,
-	0x74, 0x12, 0x21, 0x0a, 0x08, 0x63, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x64, 0x73, 0x18, 0x01, 0x20,
-	0x03, 0x28, 0x0b, 0x32, 0x05, 0x2e, 0x43, 0x6f, 0x6d, 0x6d, 0x52, 0x08, 0x63, 0x6f, 0x6d, 0x6d,
-	0x65, 0x6e, 0x64, 0x73, 0x22, 0x29, 0x0a, 0x0f, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x64, 0x52,
-	0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x16, 0x0a, 0x06, 0x72, 0x65, 0x73, 0x75, 0x6c,
-	0x74, 0x18, 0x01, 0x20, 0x03, 0x28, 0x09, 0x52, 0x06, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x32,
-	0x3a, 0x0a, 0x0a, 0x43, 0x6f, 0x6d, 0x6d, 0x53, 0x65, 0x72, 0x76, 0x65, 0x72, 0x12, 0x2c, 0x0a,
-	0x07, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x64, 0x12, 0x0f, 0x2e, 0x43, 0x6f, 0x6d, 0x6d, 0x65,
-	0x6e, 0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x10, 0x2e, 0x43, 0x6f, 0x6d, 0x6d,
-	0x65, 0x6e, 0x64, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x0f, 0x5a, 0x0d, 0x73,
-	0x74, 0x6f, 0x72, 0x61, 0x67, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x06, 0x70, 0x72,
-	0x6f, 0x74, 0x6f, 0x33,
+	0x0a, 0x0d, 0x73, 0x74, 0x6f, 0x72, 0x61, 0x67, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a,
+	0x0d, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x78, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x46,
+	0x0a, 0x04, 0x43, 0x6f, 0x6d, 0x6d, 0x12, 0x2f, 0x0a, 0x0b, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67,
+	0x5f, 0x63, 0x6f, 0x6d, 0x6d, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x0c, 0x2e, 0x53, 0x74,
+	0x72, 0x69, 0x6e, 0x67, 0x78, 0x43, 0x6f, 0x6d, 0x6d, 0x48, 0x00, 0x52, 0x0a, 0x73, 0x74, 0x72,
+	0x69, 0x6e, 0x67, 0x43, 0x6f, 0x6d, 0x6d, 0x42, 0x0d, 0x0a, 0x0b, 0x63, 0x6f, 0x6d, 0x6d, 0x5f,
+	0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x22, 0x33, 0x0a, 0x0e, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e,
+	0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x12, 0x21, 0x0a, 0x08, 0x63, 0x6f, 0x6d, 0x6d,
+	0x65, 0x6e, 0x64, 0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x05, 0x2e, 0x43, 0x6f, 0x6d,
+	0x6d, 0x52, 0x08, 0x63, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x64, 0x73, 0x22, 0x29, 0x0a, 0x0f, 0x43,
+	0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x64, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x16,
+	0x0a, 0x06, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x18, 0x01, 0x20, 0x03, 0x28, 0x09, 0x52, 0x06,
+	0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x32, 0x3a, 0x0a, 0x0a, 0x43, 0x6f, 0x6d, 0x6d, 0x53, 0x65,
+	0x72, 0x76, 0x65, 0x72, 0x12, 0x2c, 0x0a, 0x07, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x64, 0x12,
+	0x0f, 0x2e, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74,
+	0x1a, 0x10, 0x2e, 0x43, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x64, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e,
+	0x73, 0x65, 0x42, 0x0b, 0x5a, 0x09, 0x70, 0x6b, 0x67, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -221,16 +224,18 @@ var file_storage_proto_goTypes = []interface{}{
 	(*Comm)(nil),            // 0: Comm
 	(*CommendRequest)(nil),  // 1: CommendRequest
 	(*CommendResponse)(nil), // 2: CommendResponse
+	(*StringxComm)(nil),     // 3: StringxComm
 }
 var file_storage_proto_depIdxs = []int32{
-	0, // 0: CommendRequest.commends:type_name -> Comm
-	1, // 1: CommServer.Commend:input_type -> CommendRequest
-	2, // 2: CommServer.Commend:output_type -> CommendResponse
-	2, // [2:3] is the sub-list for method output_type
-	1, // [1:2] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	1, // [1:1] is the sub-list for extension extendee
-	0, // [0:1] is the sub-list for field type_name
+	3, // 0: Comm.string_comm:type_name -> StringxComm
+	0, // 1: CommendRequest.commends:type_name -> Comm
+	1, // 2: CommServer.Commend:input_type -> CommendRequest
+	2, // 3: CommServer.Commend:output_type -> CommendResponse
+	3, // [3:4] is the sub-list for method output_type
+	2, // [2:3] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	2, // [2:2] is the sub-list for extension extendee
+	0, // [0:2] is the sub-list for field type_name
 }
 
 func init() { file_storage_proto_init() }
@@ -238,6 +243,7 @@ func file_storage_proto_init() {
 	if File_storage_proto != nil {
 		return
 	}
+	file_stringx_proto_init()
 	if !protoimpl.UnsafeEnabled {
 		file_storage_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Comm); i {
@@ -276,6 +282,9 @@ func file_storage_proto_init() {
 			}
 		}
 	}
+	file_storage_proto_msgTypes[0].OneofWrappers = []interface{}{
+		(*Comm_StringComm)(nil),
+	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
diff --git a/structure/proto/stringx.pb.go b/pkg/proto/stringx.pb.go
similarity index 97%
rename from structure/proto/stringx.pb.go
rename to pkg/proto/stringx.pb.go
index 49b71ba..c963904 100644
--- a/structure/proto/stringx.pb.go
+++ b/pkg/proto/stringx.pb.go
@@ -219,9 +219,8 @@ var file_stringx_proto_rawDesc = []byte{
 	0x52, 0x03, 0x67, 0x65, 0x74, 0x12, 0x1f, 0x0a, 0x03, 0x73, 0x65, 0x74, 0x18, 0x02, 0x20, 0x01,
 	0x28, 0x0b, 0x32, 0x0b, 0x2e, 0x53, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x78, 0x47, 0x65, 0x74, 0x48,
 	0x00, 0x52, 0x03, 0x73, 0x65, 0x74, 0x42, 0x0f, 0x0a, 0x0d, 0x73, 0x74, 0x72, 0x69, 0x6e, 0x67,
-	0x5f, 0x78, 0x5f, 0x63, 0x6f, 0x6d, 0x6d, 0x42, 0x11, 0x5a, 0x0f, 0x73, 0x74, 0x72, 0x75, 0x63,
-	0x74, 0x75, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
-	0x6f, 0x33,
+	0x5f, 0x78, 0x5f, 0x63, 0x6f, 0x6d, 0x6d, 0x42, 0x0b, 0x5a, 0x09, 0x70, 0x6b, 0x67, 0x2f, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/proto/structure/base.proto b/proto/structure/base.proto
deleted file mode 100644
index 52a8293..0000000
--- a/proto/structure/base.proto
+++ /dev/null
@@ -1,8 +0,0 @@
-syntax = "proto3";
-
-option go_package = "structure/proto";
-
-message BaseKey {
-    string key = 1;
-    int64 ttl = 2;
-}
\ No newline at end of file
diff --git a/protobuf/base.proto b/protobuf/base.proto
new file mode 100644
index 0000000..85ebaa6
--- /dev/null
+++ b/protobuf/base.proto
@@ -0,0 +1,10 @@
+syntax = "proto3";
+
+option go_package = "pkg/proto";
+import "google/protobuf/timestamp.proto";
+
+message BaseKey {
+    string key = 1;
+    int64 ttl = 2;
+    google.protobuf.Timestamp expire =  3;
+}
\ No newline at end of file
diff --git a/proto/storage/storage.proto b/protobuf/storage.proto
similarity index 67%
rename from proto/storage/storage.proto
rename to protobuf/storage.proto
index 34abd2a..c795937 100644
--- a/proto/storage/storage.proto
+++ b/protobuf/storage.proto
@@ -1,11 +1,12 @@
 syntax = "proto3";
 
-option go_package = "storage/proto";
+option go_package = "pkg/proto";
+import "stringx.proto";
 
 message Comm {
-  string key = 1;
-  string Operation = 2;
-  repeated string Option = 3;
+  oneof comm_option {
+    StringxComm string_comm = 1;
+  }
 }
 
 message CommendRequest {
diff --git a/proto/structure/stringx.proto b/protobuf/stringx.proto
similarity index 86%
rename from proto/structure/stringx.proto
rename to protobuf/stringx.proto
index fbe46f5..edf4ebc 100644
--- a/proto/structure/stringx.proto
+++ b/protobuf/stringx.proto
@@ -2,7 +2,8 @@ syntax = "proto3";
 
 import "base.proto";
 
-option go_package = "structure/proto";
+option go_package = "pkg/proto";
+
 
 message StringXSet {
     BaseKey key = 1;
diff --git a/shell/proto.py b/shell/proto.py
index 4927dec..9c2b57f 100644
--- a/shell/proto.py
+++ b/shell/proto.py
@@ -1,7 +1,7 @@
 import os
 
 sysPath = os.getcwd()
-protoPath = f"{sysPath}/proto"
+protoPath = f"{sysPath}/protobuf"
 
 comm = """
  protoc --proto_path={} --proto_path={} --go_out=plugins=grpc:{} {} 
diff --git a/storage/server/server.go b/storage/server/server.go
index 41044c2..76de968 100644
--- a/storage/server/server.go
+++ b/storage/server/server.go
@@ -14,7 +14,7 @@ func NewServer() proto.CommServerServer {
 
 func (s *server) Commend(
 	ctx context.Context,
-	request *proto.CommendRequest,
+	req *proto.CommendRequest,
 ) (*proto.CommendResponse, error) {
 	return nil, nil
 }