diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..a460645
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "go.inferGopath": false
+}
\ No newline at end of file
diff --git a/bdledger/api/contract.proto b/bdledger/api/contract.proto
new file mode 100644
index 0000000..2e8435c
--- /dev/null
+++ b/bdledger/api/contract.proto
@@ -0,0 +1,69 @@
+syntax = "proto3";
+
+//protoc --plugin=protoc-gen-grpc-java=/Users/oliveds/docs/grpc/grpc-java/compiler/build/exe/java_plugin/protoc-gen-grpc-java --grpc-java_out=./out --proto_path=./out Go2JavaService.proto
+//protoc --java_out=./out --proto_path=./out Go2JavaService.proto
+
+///:. 生成的文件到当前目录
+//protoc -I /Users/oliveds/docs/grpc/out --go_out=plugins=grpc:. /Users/oliveds/docs/grpc/out/Go2JavaService.proto 
+
+option go_package = "bdware.org/bdledger/pkg/api/grpc/proto";
+option java_package = "com.bdware.units.grpc";
+option java_outer_classname = "GRPCGo2JavaService";
+option objc_class_prefix = "RTG";
+
+package com.bdware.units.grpc;
+
+// Interface exported by the server.
+service Go2JavaService {
+
+  rpc Go2JavaStream(stream Go2JavaMessage) returns (stream Go2JavaMessage){}                                
+
+}
+
+
+message Go2JavaMessage {
+  Go2JavaMessageType msgType=1;
+  string myPeerID = 2;
+  repeated string peerID = 3;
+  ContractUnitRequestType cuType = 4;
+  StatusType statusType = 5;
+  bytes content = 6;
+  string requestID = 7;
+  repeated string contractID = 8;
+  int32 num = 9;
+  string signature = 10;
+
+  enum Go2JavaMessageType{
+    ContractUnitRequest = 0;
+    ContractUnitResponse = 1;
+    GetMyPeerID = 2;
+    MyPeerIDResponse = 3;
+    ContractStatusRequest = 4;
+    ContractStatusResponse = 5;
+    GetRandomPeers = 6;
+    GetAllPeers = 7;
+    RandomPeersResponse = 8;
+    AllPeersResponse = 9;
+    
+  }
+
+  enum StatusType{
+    SUCCESS = 0;
+    FAIL = 1;
+  }
+
+  enum ContractUnitRequestType{
+    START = 0;
+    STOP = 1;
+    EXECUTE = 2;
+    REPLY = 3;
+    REQUEST = 4;
+    PREPREPARE = 5;
+    PREPARE = 6;
+    COMMIT = 7;
+    ADDPEER = 8;
+    DROPPEER = 9;
+    STATESYNC = 10;
+  }
+}
+
diff --git a/docs.md b/docs.md
index 581ab7f..605245a 100644
--- a/docs.md
+++ b/docs.md
@@ -217,7 +217,7 @@ message SendTransactionResponse {
     to: "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
     data: "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675"
   }
-]
+}
 
 // 结果
 {
diff --git a/scripts/gen-go.bat b/scripts/gen-go.bat
index e1d08c5..620d1bf 100644
--- a/scripts/gen-go.bat
+++ b/scripts/gen-go.bat
@@ -15,5 +15,6 @@ if not exist %dir% mkdir %dir%
 %exe% -I . --go_out=plugins=grpc:%dir% bdledger/api/node.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/contract.proto
 
 echo all done
diff --git a/scripts/gen-go.sh b/scripts/gen-go.sh
index b17a915..ed8717a 100644
--- a/scripts/gen-go.sh
+++ b/scripts/gen-go.sh
@@ -7,3 +7,5 @@ protoc -I . --go_out=plugins=grpc:$dir bdledger/api/error_details.proto
 protoc -I . --go_out=plugins=grpc:$dir bdledger/api/node.proto
 protoc -I . --go_out=plugins=grpc:$dir bdledger/api/ledger.proto
 protoc -I . --go_out=plugins=grpc:$dir bdledger/api/query.proto
+protoc -I . --go_out=plugins=grpc:$dir bdledger/api/contract.proto
+
diff --git a/scripts/gen-node.js.sh b/scripts/gen-node.js.sh
index 2dd1ec1..1f72893 100644
--- a/scripts/gen-node.js.sh
+++ b/scripts/gen-node.js.sh
@@ -8,3 +8,4 @@ protoc -I . --js_out=import_style=commonjs,binary:$dir --grpc_out=$dir --plugin=
 protoc -I . --js_out=import_style=commonjs,binary:$dir --grpc_out=$dir --plugin=protoc-gen-grpc="$pluginPath" bdledger/api/node.proto
 protoc -I . --js_out=import_style=commonjs,binary:$dir --grpc_out=$dir --plugin=protoc-gen-grpc="$pluginPath" bdledger/api/ledger.proto
 protoc -I . --js_out=import_style=commonjs,binary:$dir --grpc_out=$dir --plugin=protoc-gen-grpc="$pluginPath" bdledger/api/query.proto
+protoc -I . --js_out=import_style=commonjs,binary:$dir --grpc_out=$dir --plugin=protoc-gen-grpc="$pluginPath" bdledger/api/contract.proto
\ No newline at end of file
diff --git a/scripts/gen-nodejs.bat b/scripts/gen-nodejs.bat
index 849462b..c029ab1 100644
--- a/scripts/gen-nodejs.bat
+++ b/scripts/gen-nodejs.bat
@@ -15,5 +15,6 @@ call %exe% -I . --js_out=import_style=commonjs,binary:%dir% --grpc_out=%dir% --p
 call %exe% -I . --js_out=import_style=commonjs,binary:%dir% --grpc_out=%dir% --plugin=protoc-gen-grpc=%pluginPath% bdledger/api/node.proto
 call %exe% -I . --js_out=import_style=commonjs,binary:%dir% --grpc_out=%dir% --plugin=protoc-gen-grpc=%pluginPath% bdledger/api/ledger.proto
 call %exe% -I . --js_out=import_style=commonjs,binary:%dir% --grpc_out=%dir% --plugin=protoc-gen-grpc=%pluginPath% bdledger/api/query.proto
+call %exe% -I . --js_out=import_style=commonjs,binary:%dir% --grpc_out=%dir% --plugin=protoc-gen-grpc=%pluginPath% bdledger/api/contract.proto
 
 echo all done
diff --git a/scripts/gen-web.bat b/scripts/gen-web.bat
index 593d664..ee4c048 100644
--- a/scripts/gen-web.bat
+++ b/scripts/gen-web.bat
@@ -13,5 +13,6 @@ 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/node.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/contract.proto
 
 echo all done
diff --git a/scripts/gen-web.sh b/scripts/gen-web.sh
index 257ca78..299429b 100644
--- a/scripts/gen-web.sh
+++ b/scripts/gen-web.sh
@@ -7,3 +7,4 @@ protoc -I . --js_out=import_style=commonjs:$dir --grpc-web_out=import_style=comm
 protoc -I . --js_out=import_style=commonjs:$dir --grpc-web_out=import_style=commonjs,mode=grpcwebtext:$dir bdledger/api/node.proto
 protoc -I . --js_out=import_style=commonjs:$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/contract.proto