diff --git a/bdchain/api/ac_chain.proto b/bdchain/api/ac_chain.proto
index 1853c9c..4f43ea8 100644
--- a/bdchain/api/ac_chain.proto
+++ b/bdchain/api/ac_chain.proto
@@ -11,85 +11,85 @@ option java_outer_classname = "AccountingChainProto";
 option java_multiple_files = true;
 
 service AccountingChain {
-    rpc ClientVersion (google.protobuf.Empty) returns (ClientVersionResponse);
-    rpc BlockNumber (BlockNumberRequest) returns (BlockNumberResponse);
-    rpc GetBlockByNumber (GetBlockByNumberRequest) returns (BlockResponse);
-    rpc GetBlockByHash (GetBlockByHashRequest) returns (BlockResponse);
-    rpc GetTransactionByHash (GetTransactionByHashRequest) returns (TransactionResponse);
-    rpc GetTransactionByBlockNumberAndIndex (GetTransactionByBlockNumberAndIndexRequest) returns (TransactionResponse);
-    rpc GetTransactionByBlockHashAndIndex (GetTransactionByBlockHashAndIndexRequest) returns (TransactionResponse);
+  rpc ClientVersion (google.protobuf.Empty) returns (ClientVersionResponse);
+  rpc BlockNumber (BlockNumberRequest) returns (BlockNumberResponse);
+  rpc GetBlockByNumber (GetBlockByNumberRequest) returns (BlockResponse);
+  rpc GetBlockByHash (GetBlockByHashRequest) returns (BlockResponse);
+  rpc GetTransactionByHash (GetTransactionByHashRequest) returns (TransactionResponse);
+  rpc GetTransactionByBlockNumberAndIndex (GetTransactionByBlockNumberAndIndexRequest) returns (TransactionResponse);
+  rpc GetTransactionByBlockHashAndIndex (GetTransactionByBlockHashAndIndexRequest) returns (TransactionResponse);
 }
 
 message Transaction {
-    uint64 block_number = 1; // 事务所在的区块的区块号，当事务处于待确认状态时为`null`
-    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
-    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
-    bytes data = 9; // 数据或合约代码
-    bytes v = 10; // ECDSA recovery id
-    bytes r = 11; // ECDSA signature r
-    bytes s = 12; // ECDSA signature s
+  uint64 block_number = 1; // 事务所在的区块的区块号，当事务处于待确认状态时为`null`
+  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
+  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
+  bytes data = 9; // 数据或合约代码
+  bytes v = 10; // ECDSA recovery id
+  bytes r = 11; // ECDSA signature r
+  bytes s = 12; // ECDSA signature s
 }
 
 message Block {
-    uint64 number = 1; // 区块号，当区块处于待确认状态时为`null`
-    bytes hash = 2; // 区块的哈希，当区块处于待确认状态时为`null`
-    bytes parent_hash = 3; // 父区块的哈希
-    bytes witness = 4; // 见证者账户地址
-    uint64 timestamp = 5; // 区块产生时的UNIX时间戳
-    uint64 size = 6; // 区块大小的字节数
-    bytes transactions_root = 7; // 区块的事务树根
-    repeated Transaction transactions = 8; // 事务对象的数组，或为空
-    repeated bytes transaction_hashes = 9; // 32字节的交易哈希的数组，或为空
+  uint64 number = 1; // 区块号，当区块处于待确认状态时为`null`
+  bytes hash = 2; // 区块的哈希，当区块处于待确认状态时为`null`
+  bytes parent_hash = 3; // 父区块的哈希
+  bytes witness = 4; // 见证者账户地址
+  uint64 timestamp = 5; // 区块产生时的UNIX时间戳
+  uint64 size = 6; // 区块大小的字节数
+  bytes transactions_root = 7; // 区块的事务树根
+  repeated Transaction transactions = 8; // 事务对象的数组，或为空
+  repeated bytes transaction_hashes = 9; // 32字节的交易哈希的数组，或为空
 }
 
 message BlockNumberRequest {
-    string ledger = 1;
+  string ledger = 1;
 }
 message BlockNumberResponse {
-    Error error = 1;
-    uint64 block_number = 2;
+  Error error = 1;
+  uint64 block_number = 2;
 }
 
 message GetBlockByNumberRequest {
-    string ledger = 1;
-    uint64 number = 2;
-    bool full_transaction = 3;
+  string ledger = 1;
+  uint64 number = 2;
+  bool full_transaction = 3;
 }
 
 message GetBlockByHashRequest {
-    string ledger = 1;
-    bytes hash = 2;
-    bool full_transaction = 3;
+  string ledger = 1;
+  bytes hash = 2;
+  bool full_transaction = 3;
 }
 
 message BlockResponse {
-    Error error = 1;
-    Block block = 2;
+  Error error = 1;
+  Block block = 2;
 }
 
 message GetTransactionByHashRequest {
-    string ledger = 1;
-    bytes hash = 2;
+  string ledger = 1;
+  bytes hash = 2;
 }
 
 message GetTransactionByBlockNumberAndIndexRequest {
-    string ledger = 1;
-    uint64 block_number = 2;
-    uint32 index = 3;
+  string ledger = 1;
+  uint64 block_number = 2;
+  uint32 index = 3;
 }
 
 message GetTransactionByBlockHashAndIndexRequest {
-    string ledger = 1;
-    bytes block_hash = 2;
-    uint32 index = 3;
+  string ledger = 1;
+  bytes block_hash = 2;
+  uint32 index = 3;
 }
 
 message TransactionResponse {
-    Error error = 1;
-    Transaction transaction = 2;
+  Error error = 1;
+  Transaction transaction = 2;
 }
diff --git a/bdchain/api/common.proto b/bdchain/api/common.proto
index b4187c5..69268cf 100644
--- a/bdchain/api/common.proto
+++ b/bdchain/api/common.proto
@@ -8,21 +8,21 @@ option java_outer_classname = "CommonProto";
 option java_multiple_files = true;
 
 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.
+  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.
 }
 
 message ClientVersionResponse {
-    Error error = 1;
-    string version = 2; // 节点客户端版本
+  Error error = 1;
+  string version = 2; // 节点客户端版本
 }
 
 /* 事务类型 */
 enum TransactionType {
-    RECORD = 0; // 通用数据记录
-    MESSAGE = 1; // 消息
-    CONTRACT_CREATION = 2; // 合约创建
-    CONTRACT_INVOCATION = 3; // 合约调用
+  RECORD = 0; // 通用数据记录
+  MESSAGE = 1; // 消息
+  CONTRACT_CREATION = 2; // 合约创建
+  CONTRACT_INVOCATION = 3; // 合约调用
 }
diff --git a/bdchain/api/tx_ledger.proto b/bdchain/api/tx_ledger.proto
index 2fa63ca..4130970 100644
--- a/bdchain/api/tx_ledger.proto
+++ b/bdchain/api/tx_ledger.proto
@@ -11,35 +11,35 @@ option java_outer_classname = "TransactionLedgerProto";
 option java_multiple_files = true;
 
 service TransactionLedger {
-    rpc ClientVersion (google.protobuf.Empty) returns (ClientVersionResponse);
-    rpc CreateLedger (CreateLedgerRequest) returns (CreateLedgerResponse);
-    rpc GetLedgers (google.protobuf.Empty) returns (GetLedgersResponse);
-    rpc SendTransaction (SendTransactionRequest) returns (SendTransactionResponse);
+  rpc ClientVersion (google.protobuf.Empty) returns (ClientVersionResponse);
+  rpc CreateLedger (CreateLedgerRequest) returns (CreateLedgerResponse);
+  rpc GetLedgers (google.protobuf.Empty) returns (GetLedgersResponse);
+  rpc SendTransaction (SendTransactionRequest) returns (SendTransactionResponse);
 }
 
 message CreateLedgerRequest {
-    string name = 1;
+  string name = 1;
 }
 message CreateLedgerResponse {
-    Error error = 1;
+  Error error = 1;
 }
 
 message GetLedgersResponse {
-    Error error = 1;
-    repeated string ledgers = 2;
+  Error error = 1;
+  repeated string ledgers = 2;
 }
 
 message SendTransactionRequest {
-    string ledger = 1;
-    message Transaction {
-        TransactionType type = 1;
-        bytes from = 2;
-        bytes to = 3;
-        bytes data = 4;
-    }
-    Transaction transaction = 2;
+  string ledger = 1;
+  message Transaction {
+    TransactionType type = 1;
+    bytes from = 2;
+    bytes to = 3;
+    bytes data = 4;
+  }
+  Transaction transaction = 2;
 }
 message SendTransactionResponse {
-    Error error = 1;
-    bytes hash = 2;
+  Error error = 1;
+  bytes hash = 2;
 }