diff --git a/bdledger/api/common.proto b/bdledger/api/common.proto
index 80ca0f7..3ad65e0 100644
--- a/bdledger/api/common.proto
+++ b/bdledger/api/common.proto
@@ -1,15 +1,13 @@
 syntax = "proto3";
 
-package bdledger.api.common;
+package bdledger.api;
 
-option go_package = "bdware.org/bdledger/sdk/api/grpc/common";
+option go_package = "bdware.org/bdledger/pkg/api/grpc/proto";
 option java_package = "bdledger.api.grpc.common";
 option java_outer_classname = "CommonProto";
 option java_multiple_files = true;
 
-message ClientVersionResponse {
-  string version = 1; // 节点客户端版本
-}
+
 
 /* 事务类型 */
 enum TransactionType {
@@ -24,7 +22,7 @@ message Transaction {
   bytes block_hash = 1;     // 事务所在的区块的哈希，当事务处于待确认状态时为`null`
   uint32 index = 2;         // 事务在区块中的位置 index，当事务处于待确认状态时为`null`
   bytes hash = 3;           // 事务的哈希
-  common.TransactionType type = 4; // 事务类型
+  TransactionType type = 4; // 事务类型
   bytes from = 5;           // 发送账户地址
   uint64 nonce = 6;         // 这条事务之前发送者所发送的事务数量
   bytes to = 7;             // 接收账户地址，或者调用的合约地址，或者`null`如为合约创建
diff --git a/bdledger/api/error_details.proto b/bdledger/api/error_details.proto
index 59d6db2..9423514 100644
--- a/bdledger/api/error_details.proto
+++ b/bdledger/api/error_details.proto
@@ -1,8 +1,8 @@
 syntax = "proto3";
 
-package bdledger.api.common;
+package bdledger.api;
 
-option go_package = "bdware.org/bdledger/sdk/api/grpc/errdetails";
+option go_package = "bdware.org/bdledger/pkg/api/grpc/proto";
 option java_package = "bdledger.api.grpc.common";
 option java_outer_classname = "ErrorDetailsProto";
 option java_multiple_files = true;
diff --git a/bdledger/api/ledger.proto b/bdledger/api/ledger.proto
new file mode 100644
index 0000000..8ad9819
--- /dev/null
+++ b/bdledger/api/ledger.proto
@@ -0,0 +1,42 @@
+syntax = "proto3";
+
+package bdledger.api;
+
+import "google/protobuf/empty.proto";
+import "bdledger/api/common.proto";
+
+option go_package = "bdware.org/bdledger/pkg/api/grpc/proto";
+option java_package = "bdledger.api.grpc.ledger";
+option java_outer_classname = "LedgerProto";
+option java_multiple_files = true;
+
+service TransactionLedger {
+  rpc CreateLedger (CreateLedgerRequest) returns (CreateLedgerResponse);
+  rpc GetLedgers (google.protobuf.Empty) returns (GetLedgersResponse);
+  rpc SendTransaction (SendTransactionRequest) returns (SendTransactionResponse);
+}
+
+message CreateLedgerRequest {
+  string name = 1;
+}
+message CreateLedgerResponse {
+  bool ok = 1;
+}
+
+message GetLedgersResponse {
+  repeated string ledgers = 1;
+}
+
+message SendTransactionRequest {
+  string ledger = 1;
+  message Transaction {
+    TransactionType type = 1;
+    bytes from = 2;
+    bytes to = 3;
+    bytes data = 4;
+  }
+  Transaction transaction = 2;
+}
+message SendTransactionResponse {
+  bytes hash = 1;
+}
diff --git a/bdledger/api/node.proto b/bdledger/api/node.proto
new file mode 100644
index 0000000..4d177a7
--- /dev/null
+++ b/bdledger/api/node.proto
@@ -0,0 +1,18 @@
+syntax = "proto3";
+
+package bdledger.api;
+
+import "google/protobuf/empty.proto";
+
+option go_package = "bdware.org/bdledger/pkg/api/grpc/proto";
+option java_package = "bdledger.api.grpc.node";
+option java_outer_classname = "NodeProto";
+option java_multiple_files = true;
+
+service Node {
+  rpc ClientVersion (google.protobuf.Empty) returns (ClientVersionResponse);
+}
+
+message ClientVersionResponse {
+    string version = 1; // 节点客户端版本
+  }
\ No newline at end of file
diff --git a/bdledger/api/query_service.proto b/bdledger/api/query.proto
similarity index 83%
rename from bdledger/api/query_service.proto
rename to bdledger/api/query.proto
index e406089..9111963 100644
--- a/bdledger/api/query_service.proto
+++ b/bdledger/api/query.proto
@@ -1,12 +1,12 @@
 syntax = "proto3";
 
-package bdledger.api.queryservice;
+package bdledger.api;
 
 import "bdledger/api/common.proto";
 
-option go_package = "bdware.org/bdledger/sdk/api/grpc/queryservice";
-option java_package = "bdledger.api.grpc.queryservice";
-option java_outer_classname = "QueryServiceProto";
+option go_package = "bdware.org/bdledger/pkg/api/grpc/proto";
+option java_package = "bdledger.api.grpc.query";
+option java_outer_classname = "QueryProto";
 option java_multiple_files = true;
 
 service Query {
@@ -39,7 +39,7 @@ message BlocksRequest {
     int64 end_timestamp = 4;
 }
 message GetBlocksResponse {
-    repeated common.Block blocks= 1;
+    repeated Block blocks= 1;
     int64 start_timestamp = 2;
     int64 end_timestamp = 3;
 }
@@ -54,7 +54,7 @@ message TransactionsRequest {
     int64 end_timestamp = 4;
 }
 message GetTransactionsResponse {
-    repeated common.Transaction Transactions = 1;
+    repeated Transaction transactions = 1;
     int64 start_timestamp = 2;
     int64 end_timestamp = 3;
 }
@@ -68,7 +68,7 @@ message GetBlockByHashRequest {
     bool full_transaction = 3;
 }
 message GetBlockByHashResponse {
-    common.Block block = 1;
+    Block block = 1;
 }
 
 message GetTransactionByHashRequest {
@@ -76,7 +76,7 @@ message GetTransactionByHashRequest {
     bytes hash = 2;
 }
 message GetTransactionByHashResponse {
-    common.Transaction transaction = 1;
+    Transaction transaction = 1;
 }
 
 message GetTransactionByBlockHashAndIndexRequest {
@@ -85,5 +85,5 @@ message GetTransactionByBlockHashAndIndexRequest {
     uint32 index = 3;
 }
 message GetTransactionByBlockHashAndIndexResponse {
-    common.Transaction transaction = 1;
+    Transaction transaction = 1;
 }
diff --git a/bdledger/api/tx_ledger.proto b/bdledger/api/tx_ledger.proto
deleted file mode 100644
index ab11ac9..0000000
--- a/bdledger/api/tx_ledger.proto
+++ /dev/null
@@ -1,62 +0,0 @@
-syntax = "proto3";
-
-package bdledger.api.txledger;
-
-import "google/protobuf/empty.proto";
-import "bdledger/api/common.proto";
-
-option go_package = "bdware.org/bdledger/sdk/api/grpc/txledger";
-option java_package = "bdledger.api.grpc.txledger";
-option java_outer_classname = "TransactionLedgerProto";
-option java_multiple_files = true;
-
-service TransactionLedger {
-  rpc ClientVersion (google.protobuf.Empty) returns (common.ClientVersionResponse);
-  rpc CreateLedger (CreateLedgerRequest) returns (CreateLedgerResponse);
-  rpc GetLedgers (google.protobuf.Empty) returns (GetLedgersResponse);
-  rpc BlockCount (BlockCountRequest) returns (BlockCountResponse);
-  rpc GetBlocks (GetBlocksRequest) returns (GetBlocksResponse);
-  rpc SendTransaction (SendTransactionRequest) returns (SendTransactionResponse);
-}
-
-message CreateLedgerRequest {
-  string name = 1;
-}
-message CreateLedgerResponse {
-  bool ok = 1;
-}
-
-message GetLedgersResponse {
-  repeated string ledgers = 1;
-}
-
-message BlockCountRequest {
-  string ledger = 1;
-}
-message BlockCountResponse {
-  uint64 block_count = 1;
-}
-
-message GetBlocksRequest {
-  string ledger = 1;
-  uint64 from_index = 2;
-  uint32 count = 3; // Optional, default to 10, max value is 10
-  bool full_transaction = 4;
-}
-message GetBlocksResponse {
-  repeated common.Block blocks = 1;
-}
-
-message SendTransactionRequest {
-  string ledger = 1;
-  message Transaction {
-    common.TransactionType type = 1;
-    bytes from = 2;
-    bytes to = 3;
-    bytes data = 4;
-  }
-  Transaction transaction = 2;
-}
-message SendTransactionResponse {
-  bytes hash = 1;
-}
diff --git a/docs.md b/docs.md
index 58592cd..581ab7f 100644
--- a/docs.md
+++ b/docs.md
@@ -8,7 +8,7 @@ message ClientVersionResponse {
 }
 ```
 
-### common.TransactionType 事务类型
+### TransactionType 事务类型
 
 ```
 enum TransactionType {
@@ -30,7 +30,7 @@ message Transaction {
   bytes block_hash = 2; // 事务所在的区块的哈希，当事务处于待确认状态时为`null`
   uint32 index = 3; // 事务在区块中的位置index，当事务处于待确认状态时为`null`
   bytes hash = 4; // 事务的哈希
-  common.TransactionType type = 5; // 事务类型
+  TransactionType type = 5; // 事务类型
   bytes from = 6; // 发送账户地址
   uint64 nonce = 7; // 这条事务之前发送者所发送的事务数量
   bytes to = 8; // 接收账户地址，或者调用的合约地址，或者`null`如为合约创建
@@ -186,7 +186,7 @@ message GetLedgersResponse {
 message SendTransactionRequest {
   string ledger = 1;
   message Transaction {
-    common.TransactionType type = 1;
+    TransactionType type = 1;
     bytes from = 2;
     bytes to = 3;
     bytes data = 4;
diff --git a/gen-go.bat b/gen-go.bat
index e9314cf..ef0fa5c 100644
--- a/gen-go.bat
+++ b/gen-go.bat
@@ -11,7 +11,8 @@ where /q %gen% || echo missing %gen% && exit /B
 if not exist %dir% mkdir %dir%
 %exe% -I . --go_out=plugins=grpc:%dir% bdledger/api/common.proto
 %exe% -I . --go_out=plugins=grpc:%dir% bdledger/api/error_details.proto
-%exe% -I . --go_out=plugins=grpc:%dir% bdledger/api/tx_ledger.proto
-%exe% -I . --go_out=plugins=grpc:%dir% bdledger/api/query_service.proto
+%exe% -I . --go_out=plugins=grpc:%dir% bdledger/api/ledger.proto
+%exe% -I . --go_out=plugins=grpc:%dir% bdledger/api/query.proto
+%exe% -I . --go_out=plugins=grpc:%dir% bdledger/api/node.proto
 
 echo all done
diff --git a/gen-go.sh b/gen-go.sh
index 1ecec3b..617ffc7 100644
--- a/gen-go.sh
+++ b/gen-go.sh
@@ -2,5 +2,6 @@
 mkdir -p gen/go
 protoc -I . --go_out=plugins=grpc:gen/go bdledger/api/common.proto
 protoc -I . --go_out=plugins=grpc:gen/go bdledger/api/error_details.proto
-protoc -I . --go_out=plugins=grpc:gen/go bdledger/api/tx_ledger.proto
-protoc -I . --go_out=plugins=grpc:gen/go bdledger/api/query_service.proto
+protoc -I . --go_out=plugins=grpc:gen/go bdledger/api/ledger.proto
+protoc -I . --go_out=plugins=grpc:gen/go bdledger/api/query.proto
+protoc -I . --go_out=plugins=grpc:gen/go bdledger/api/node.proto
diff --git a/gen-web.bat b/gen-web.bat
index 6a7d7f3..4329193 100644
--- a/gen-web.bat
+++ b/gen-web.bat
@@ -9,7 +9,8 @@ where /q %gen% || echo missing %gen% && exit /B
 if not exist %dir% mkdir %dir%
 %exe% -I . --js_out=import_style=commonjs:%dir% --grpc-web_out=import_style=commonjs,mode=grpcwebtext:%dir% bdledger/api/common.proto
 %exe% -I . --js_out=import_style=commonjs:%dir% --grpc-web_out=import_style=commonjs,mode=grpcwebtext:%dir% bdledger/api/error_details.proto
-%exe% -I . --js_out=import_style=commonjs:%dir% --grpc-web_out=import_style=commonjs,mode=grpcwebtext:%dir% bdledger/api/tx_ledger.proto
-%exe% -I . --js_out=import_style=commonjs:%dir% --grpc-web_out=import_style=commonjs,mode=grpcwebtext:%dir% bdledger/api/query_service.proto
+%exe% -I . --js_out=import_style=commonjs:%dir% --grpc-web_out=import_style=commonjs,mode=grpcwebtext:%dir% bdledger/api/ledger.proto
+%exe% -I . --js_out=import_style=commonjs:%dir% --grpc-web_out=import_style=commonjs,mode=grpcwebtext:%dir% bdledger/api/query.proto
+%exe% -I . --js_out=import_style=commonjs:%dir% --grpc-web_out=import_style=commonjs,mode=grpcwebtext:%dir% bdledger/api/node.proto
 
 echo all done
diff --git a/gen-web.sh b/gen-web.sh
index 341c76a..0a07ce3 100644
--- a/gen-web.sh
+++ b/gen-web.sh
@@ -3,5 +3,6 @@ dir=gen/web
 mkdir -p $dir
 protoc -I . --js_out=import_style=commonjs:$dir --grpc-web_out=import_style=commonjs,mode=grpcwebtext:$dir bdledger/api/common.proto
 protoc -I . --js_out=import_style=commonjs:$dir --grpc-web_out=import_style=commonjs,mode=grpcwebtext:$dir bdledger/api/error_details.proto
-protoc -I . --js_out=import_style=commonjs:$dir --grpc-web_out=import_style=commonjs,mode=grpcwebtext:$dir bdledger/api/tx_ledger.proto
-protoc -I . --js_out=import_style=commonjs:$dir --grpc-web_out=import_style=commonjs,mode=grpcwebtext:$dir bdledger/api/query_service.proto
+protoc -I . --js_out=import_style=commonjs:$dir --grpc-web_out=import_style=commonjs,mode=grpcwebtext:$dir bdledger/api/ledger.proto
+protoc -I . --js_out=import_style=commonjs:$dir --grpc-web_out=import_style=commonjs,mode=grpcwebtext:$dir bdledger/api/query.proto
+protoc -I . --js_out=import_style=commonjs:$dir --grpc-web_out=import_style=commonjs,mode=grpcwebtext:$dir bdledger/api/node.proto
diff --git a/test.md b/test.md
index 61aeb22..b27d73f 100644
--- a/test.md
+++ b/test.md
@@ -10,7 +10,7 @@ message ClientVersionResponse {
 }
 ```
 
-### common.TransactionType
+### TransactionType
 
 ```proto
 enum TransactionType {
@@ -29,7 +29,7 @@ message Transaction {
   bytes block_hash = 1;     // 事务所在的区块的哈希，当事务处于待确认状态时为`null`
   uint32 index = 2;         // 事务在区块中的位置 index，当事务处于待确认状态时为`null`
   bytes hash = 3;           // 事务的哈希
-  common.TransactionType type = 4; // 事务类型
+  TransactionType type = 4; // 事务类型
   bytes from = 5;           // 发送账户地址
   uint64 nonce = 6;         // 这条事务之前发送者所发送的事务数量
   bytes to = 7;             // 接收账户地址，或者调用的合约地址，或者`null`如为合约创建
@@ -48,7 +48,7 @@ message Transaction {
   bytes block_hash = 2; // 事务所在的区块的哈希，当事务处于待确认状态时为`null`
   uint32 index = 3; // 事务在区块中的位置index，当事务处于待确认状态时为`null`
   bytes hash = 4; // 事务的哈希
-  common.TransactionType type = 5; // 事务类型
+  TransactionType type = 5; // 事务类型
   bytes from = 6; // 发送账户地址
   uint64 nonce = 7; // 这条事务之前发送者所发送的事务数量
   bytes to = 8; // 接收账户地址，或者调用的合约地址，或者`null`如为合约创建
@@ -339,7 +339,7 @@ blocks:
       - block_hash: 0xdeadc0dedeadc0dedeadc0dedeadc0dedeadc0de (in bytes)
         index: 0
         hash: 0x0404040404040404040404040404040404040404 (in bytes)
-        type: common.TransactionType.RECORD
+        type: TransactionType.RECORD
         from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
         nonce: 2018
         to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
@@ -350,7 +350,7 @@ blocks:
       - block_hash: 0xdeadc0dedeadc0dedeadc0dedeadc0dedeadc0de (in bytes)
         index: 1
         hash: 0x1313131313131313131313131313131313131313 (in bytes)
-        type: common.TransactionType.MESSAGE
+        type: TransactionType.MESSAGE
         from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
         nonce: 2019
         to: 0xfeedbabefeedbabefeedbabefeedbabefeedbabe (in bytes)
@@ -556,7 +556,7 @@ blocks:
 message SendTransactionRequest {
   string ledger = 1;
   message Transaction {
-    common.TransactionType type = 1;
+    TransactionType type = 1;
     bytes from = 2;
     bytes to = 3;
     bytes data = 4;
@@ -582,7 +582,7 @@ message SendTransactionResponse {
 ```yaml
 ledger: 'test'
 transaction:
-  type: common.TransactionType.MESSAGE
+  type: TransactionType.MESSAGE
   from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
   to: 0xfeedbabefeedbabefeedbabefeedbabefeedbabe (in bytes)
   data: 0xdeadbeef (in bytes)
@@ -601,7 +601,7 @@ hash: 0xd15ea5edd15ea5edd15ea5edd15ea5edd15ea5edd15ea5edd15ea5edd15ea5ed (in byt
 ```yaml
 ledger: 'test'
 transaction:
-  type: common.TransactionType.MESSAGE
+  type: TransactionType.MESSAGE
   from: null (in bytes)
   to: 0x50bada55 (in bytes)
   data: null (in bytes)
@@ -764,7 +764,7 @@ transactions:
     block_hash: 0xdeadc0dedeadc0dedeadc0dedeadc0dedeadc0de (in bytes)
     index: 0
     hash: 0x0404040404040404040404040404040404040404 (in bytes)
-    type: common.TransactionType.RECORD
+    type: TransactionType.RECORD
     from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
     nonce: 2018
     to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
@@ -776,7 +776,7 @@ transactions:
     block_hash: 0xdeadc0dedeadc0dedeadc0dedeadc0dedeadc0de (in bytes)
     index: 1
     hash: 0x1313131313131313131313131313131313131313 (in bytes)
-    type: common.TransactionType.MESSAGE
+    type: TransactionType.MESSAGE
     from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
     nonce: 2019
     to: 0xfeedbabefeedbabefeedbabefeedbabefeedbabe (in bytes)
@@ -914,7 +914,7 @@ block_number: 2018
 block_hash: 0xdeadc0dedeadc0dedeadc0dedeadc0dedeadc0de (in bytes)
 index: 0
 hash: 0x0404040404040404040404040404040404040404 (in bytes)
-type: common.TransactionType.RECORD
+type: TransactionType.RECORD
 from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
 nonce: 2018
 to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
@@ -963,7 +963,7 @@ block_number: 2018
 block_hash: 0xdeadc0dedeadc0dedeadc0dedeadc0dedeadc0de (in bytes)
 index: 0
 hash: 0x0404040404040404040404040404040404040404 (in bytes)
-type: common.TransactionType.RECORD
+type: TransactionType.RECORD
 from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
 nonce: 2018
 to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
@@ -1012,7 +1012,7 @@ block_number: 2018
 block_hash: 0xdeadc0dedeadc0dedeadc0dedeadc0dedeadc0de (in bytes)
 index: 0
 hash: 0x0404040404040404040404040404040404040404 (in bytes)
-type: common.TransactionType.RECORD
+type: TransactionType.RECORD
 from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
 nonce: 2018
 to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)