diff --git a/test.md b/test.md
index fda06bd..c8acfde 100644
--- a/test.md
+++ b/test.md
@@ -1,22 +1,10 @@
 ## Basic types
 
-### Error 
-
-```proto
-message Error {
-    string code = 1; // One of a server-defined set of error codes.
-    string message = 2; // A human-readable representation of the error.
-    string target = 3; // The target of the error.
-    repeated Error details = 4; // An array of details about specific errors that led to this reported error.
-}
-```
-
 ### ClientVersionResponse
 
 ```proto
 message ClientVersionResponse {
-    Error error = 1;
-    string version = 2; // 节点客户端版本
+    string version = 1; // 节点客户端版本
 }
 ```
 
@@ -66,24 +54,6 @@ message Block {
 }
 ```
 
-### BlockResponse
-
-```proto
-message BlockResponse {
-    Error error = 1;
-    Block block = 2;
-}
-```
-
-### TransactionResponse
-
-```proto
-message TransactionResponse {
-    Error error = 1;
-    Transaction transaction = 2;
-}
-```
-
 ---
 
 ## Transaction ledger API
@@ -113,7 +83,6 @@ bdchain.api.ClientVersionResponse
  
 **Response**
 ```yaml
-error: (empty Error object)
 version: 'TxLedgerGo/v0.0.1alpha/darwin/go1.11'
 ```
 
@@ -133,7 +102,7 @@ message CreateLedgerRequest {
  
 ```proto
 message CreateLedgerResponse {
-  Error error = 1;
+  bool ok = 1;
 }
 ```
 
@@ -148,7 +117,7 @@ name: 'test'
 
 **Response**
 ```yaml
-error: (empty Error object)
+ok: true
 ```
 
 ##### 2
@@ -164,13 +133,11 @@ On the wire:
 name: '' (defualt value)
 ```
 
-**Response**
+**Error**
 ```yaml
-error:
-  code: 'BadArgument'
-  message: 'name must not be empty'
-  target: 'name'
-  details:
+code: Code.InvalidArgument
+message: 'name must not be empty'
+details: 
 ```
 
 ---
@@ -187,8 +154,7 @@ google.protobuf.Empty
 
 ```proto
 message GetLedgersResponse {
-  Error error = 1;
-  repeated string ledgers = 2;
+  repeated string ledgers = 1;
 }
 ```
 
@@ -203,7 +169,6 @@ message GetLedgersResponse {
 
 **Response**
 ```yaml
-error: (empty Error object)
 ledgers:
   - 'first'
   - 'second'
@@ -232,9 +197,8 @@ message SendTransactionRequest {
 #### Response
 
 ```proto
-message SendTransactionResponse {
-  Error error = 1;
-  bytes hash = 2;
+message SendTransactionResponse { 
+  bytes hash = 1;
 }
 ```
 
@@ -254,7 +218,6 @@ transaction:
 
 **Response**
 ```yaml
-error: (empty Error object)
 hash: 0xd15ea5edd15ea5edd15ea5edd15ea5edd15ea5edd15ea5edd15ea5edd15ea5ed (in bytes)
 ```
 
@@ -270,22 +233,17 @@ transaction:
   data: null (in bytes)
 ```
 
-**Response**
+**Error**
 ```yaml
-error:
-  code: 'BadArgument'
-  message: 'Multiple errors in transaction'
-  target: 'transaction'
-  details:
-    - code: 'EmptyValue'
-      message: 'from must not be empty'
-      target: 'from'
-      details:
-    - code: 'MalformedAddress'
-      message: 'to must be a valid 32-byte address'
-      target: 'to'
-      details:
-hash: (empty bytes, default value)
+code: Code.InvalidArgument
+message: 'Multiple errors in transaction'
+details:
+  - code: Code.InvalidArgument
+    message: 'from must not be empty'
+    details:
+  - code: Code.InvalidArgument
+    message: 'to must be a valid 32-byte address'
+    details:
 ```
 
 ---
@@ -317,7 +275,6 @@ bdchain.api.ClientVersionResponse
  
 **Response**
 ```yaml
-error: (empty Error object)
 version: 'AcChainGo/v0.0.1alpha/darwin/go1.11' 
 ```
 
@@ -337,8 +294,7 @@ message BlockNumberRequest {
 
 ```proto
 message BlockNumberResponse {
-  Error error = 1;
-  uint64 block_number = 2;
+  uint64 block_number = 1;
 }
 ```
 
@@ -353,7 +309,6 @@ ledger: 'test'
 
 **Response**
 ```yaml
-error: (empty Error object)
 block_number: 2018
 ```
 
@@ -370,14 +325,11 @@ On the wire:
 ledger: '' (defualt value)
 ```
 
-**Response**
+**Error**
 ```yaml
-error:
-  code: 'BadArgument'
-  message: 'name must not be empty'
-  target: 'name'
-  details:
-block_number: 0 (default value)
+code: Code.InvalidArgument
+message: 'name must not be empty'
+details:
 ```
 
 ---
@@ -397,7 +349,7 @@ message GetBlockByNumberRequest {
 #### Response
 
 ```
-bdchain.api.BlockResponse
+Block
 ```
 
 #### Test cases
@@ -413,41 +365,39 @@ full_transaction: true
 
 **Response**
 ```yaml
-error: (empty Error object)
-block: 
-  number: 2018
-  hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
-  parent_hash: 0xbabefacebabefacebabefacebabefacebabefacebabefacebabefacebabeface (in bytes)
-  witness: 0x1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad (in bytes)
-  timestamp: 2018050400000
-  size: 20180504
-  transactions_root: 0x5obada555obada555obada555obada555obada555obada555obada555obada55 (in bytes)
-  transactions:
-    - block_number: 2018
-      block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
-      index: 0
-      hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
-      type: TransactionType.RECORD
-      from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
-      nonce: 2018
-      to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
-      data: 0xdeadbeef (in bytes)
-      v: 0x25 (in bytes)
-      r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
-      s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
-    - block_number: 2018
-      block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
-      index: 1
-      hash: 0x1313131313131313131313131313131313131313131313131313131313131313 (in bytes)
-      type: TransactionType.MESSAGE
-      from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
-      nonce: 2019
-      to: 0xfeedbabefeedbabefeedbabefeedbabefeedbabefeedbabefeedbabefeedbabe (in bytes)
-      data: (empty bytes, default value)
-      v: 0x25 (in bytes)
-      r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
-      s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
-  transaction_hashes:
+number: 2018
+hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+parent_hash: 0xbabefacebabefacebabefacebabefacebabefacebabefacebabefacebabeface (in bytes)
+witness: 0x1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad (in bytes)
+timestamp: 2018050400000
+size: 20180504
+transactions_root: 0x5obada555obada555obada555obada555obada555obada555obada555obada55 (in bytes)
+transactions:
+  - block_number: 2018
+    block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+    index: 0
+    hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+    type: TransactionType.RECORD
+    from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+    nonce: 2018
+    to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+    data: 0xdeadbeef (in bytes)
+    v: 0x25 (in bytes)
+    r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+    s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+  - block_number: 2018
+    block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+    index: 1
+    hash: 0x1313131313131313131313131313131313131313131313131313131313131313 (in bytes)
+    type: TransactionType.MESSAGE
+    from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+    nonce: 2019
+    to: 0xfeedbabefeedbabefeedbabefeedbabefeedbabefeedbabefeedbabefeedbabe (in bytes)
+    data: (empty bytes, default value)
+    v: 0x25 (in bytes)
+    r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+    s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+transaction_hashes:
 ```
 
 ##### 2
@@ -469,19 +419,17 @@ full_transaction: false (defualt value)
 
 **Response**
 ```yaml
-error: (empty Error object)
-block: 
-  number: 2018
-  hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
-  parent_hash: 0xbabefacebabefacebabefacebabefacebabefacebabefacebabefacebabeface (in bytes)
-  witness: 0x1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad (in bytes)
-  timestamp: 2018050400000
-  size: 20180504
-  transactions_root: 0x5obada555obada555obada555obada555obada555obada555obada555obada55 (in bytes)
-  transactions:
-  transaction_hashes:
-    - 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
-    - 0x1313131313131313131313131313131313131313131313131313131313131313 (in bytes)
+number: 2018
+hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+parent_hash: 0xbabefacebabefacebabefacebabefacebabefacebabefacebabefacebabeface (in bytes)
+witness: 0x1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad (in bytes)
+timestamp: 2018050400000
+size: 20180504
+transactions_root: 0x5obada555obada555obada555obada555obada555obada555obada555obada55 (in bytes)
+transactions:
+transaction_hashes:
+  - 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+  - 0x1313131313131313131313131313131313131313131313131313131313131313 (in bytes)
 ```
 
 ---
@@ -501,7 +449,7 @@ message GetBlockByHashRequest {
 #### Response
 
 ```
-bdchain.api.BlockResponse
+Block
 ```
 
 #### Test cases
@@ -517,19 +465,17 @@ full_transaction: false
 
 **Response**
 ```yaml
-error: (empty Error object)
-block: 
-  number: 2018
-  hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
-  parent_hash: 0xbabefacebabefacebabefacebabefacebabefacebabefacebabefacebabeface (in bytes)
-  witness: 0x1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad (in bytes)
-  timestamp: 2018050400000
-  size: 20180504
-  transactions_root: 0x5obada555obada555obada555obada555obada555obada555obada555obada55 (in bytes)
-  transactions:
-  transaction_hashes:
-    - 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
-    - 0x1313131313131313131313131313131313131313131313131313131313131313 (in bytes)
+number: 2018
+hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+parent_hash: 0xbabefacebabefacebabefacebabefacebabefacebabefacebabefacebabeface (in bytes)
+witness: 0x1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad (in bytes)
+timestamp: 2018050400000
+size: 20180504
+transactions_root: 0x5obada555obada555obada555obada555obada555obada555obada555obada55 (in bytes)
+transactions:
+transaction_hashes:
+  - 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+  - 0x1313131313131313131313131313131313131313131313131313131313131313 (in bytes)
 ```
 
 ---
@@ -548,7 +494,7 @@ message GetTransactionByHashRequest {
 #### Response
 
 ```
-bdchain.api.TransactionResponse
+Transaction
 ```
 
 #### Test cases
@@ -563,20 +509,18 @@ hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in byt
 
 **Response**
 ```yaml
-error: (empty Error object)
-transaction:
-  block_number: 2018
-  block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
-  index: 0
-  hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
-  type: TransactionType.RECORD
-  from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
-  nonce: 2018
-  to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
-  data: 0xdeadbeef (in bytes)
-  v: 0x25 (in bytes)
-  r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
-  s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+block_number: 2018
+block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+index: 0
+hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+type: TransactionType.RECORD
+from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+nonce: 2018
+to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+data: 0xdeadbeef (in bytes)
+v: 0x25 (in bytes)
+r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
 ```
 
 ---
@@ -596,7 +540,7 @@ message GetTransactionByBlockNumberAndIndexRequest {
 #### Response
 
 ```
-bdchain.api.TransactionResponse
+Transaction
 ```
 
 #### Test cases
@@ -612,20 +556,18 @@ index: 0
 
 **Response**
 ```yaml
-error: (empty Error object)
-transaction:
-  block_number: 2018
-  block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
-  index: 0
-  hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
-  type: TransactionType.RECORD
-  from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
-  nonce: 2018
-  to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
-  data: 0xdeadbeef (in bytes)
-  v: 0x25 (in bytes)
-  r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
-  s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+block_number: 2018
+block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+index: 0
+hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+type: TransactionType.RECORD
+from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+nonce: 2018
+to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+data: 0xdeadbeef (in bytes)
+v: 0x25 (in bytes)
+r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
 ```
 
 ---
@@ -645,7 +587,7 @@ message GetTransactionByBlockHashAndIndexRequest {
 #### Response
 
 ```
-bdchain.api.TransactionResponse
+Transaction
 ```
 
 #### Test cases
@@ -661,18 +603,16 @@ index: 0
 
 **Response**
 ```yaml
-error: (empty Error object)
-transaction:
-  block_number: 2018
-  block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
-  index: 0
-  hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
-  type: TransactionType.RECORD
-  from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
-  nonce: 2018
-  to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
-  data: 0xdeadbeef (in bytes)
-  v: 0x25 (in bytes)
-  r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
-  s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+block_number: 2018
+block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+index: 0
+hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+type: TransactionType.RECORD
+from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+nonce: 2018
+to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+data: 0xdeadbeef (in bytes)
+v: 0x25 (in bytes)
+r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
 ```