diff --git a/README.md b/README.md
index 9b32f06..d3da2d3 100644
--- a/README.md
+++ b/README.md
@@ -1,34 +1,48 @@
-# BDChain gRPC API 指南
+## BDLedger gRPC API
 
-## 编译 Go 版本 gRPC
+### Generating gRPC code in languages
 
-### 安装
+#### Installling tools
 
-- [Protocol Buffers 3](https://github.com/protocolbuffers/protobuf/releases)
-  - 下载对应版本，并将可执行程序 `protoc` 的目录加入到环境变量 `PATH` 中
-- Go > 1.6
-    ```bash
-    # 安装 Go 版本相关插件
-    go get -u google.golang.org/grpc
-    go get -u github.com/golang/protobuf/protoc-gen-go
-    ```
-- Node.js
-    ```bash
-    npm install -g grpc-tools
-    ```
-- Web
-    ```bash
-    git clone https://github.com/grpc/grpc-web
-    cd grpc-web
-    sudo make install-plugin
-    ```
+Download the [Protocol Buffers compiler](https://github.com/protocolbuffers/protobuf/releases) (protoc-3.11.4-*) for your platform and add `protoc` to `PATH` environment variable 
 
-参考资料：
+For generating Go code:
+```bash
+GIT_TAG="v1.4.0-rc.4"
+go get -d -u github.com/golang/protobuf/protoc-gen-go
+git -C "$(go env GOPATH)"/src/github.com/golang/protobuf checkout $GIT_TAG
+go install github.com/golang/protobuf/protoc-gen-go
+```
+(Update to google.golang.org/protobuf when https://github.com/grpc/grpc-go/pull/3435 resolves)
 
+For generating Java code: From `bdledger-sdk-java` run `gradle generateProto`
+
+For generating Node.js code:
+```bash
+npm install -g grpc-tools 
+```
+For generating TypeScript definitions, also run:
+```bash
+npm install -g protoc-gen-ts
+```
+
+For frontend JavaScript:
+```bash
+git clone https://github.com/grpc/grpc-web
+cd grpc-web
+sudo make install-plugin
+```
+
+References:
 - [Go Quick Start](https://grpc.io/docs/quickstart/go.html#prerequisites)
 - [gRPC Go FAQ](https://github.com/grpc/grpc-go#faq)
 
-### 编译
+**TODO: Look into [protobuf.js](https://github.com/protobufjs/protobuf.js) for Nodes.js and frontend**
+**TODO: Look into [Kroto+](https://github.com/marcoferrer/kroto-plus) for Kotlin**
 
-- 在本项目打开控制台，或者切换工作路径到本项目
-- 执行 `./scripts/gen-{{platform}}`
+#### Generating code
+
+Run
+```bash
+./scripts/gen [go] [nodejs] [ts]
+```
diff --git a/scripts/gen-go.bat b/scripts/gen-go.bat
deleted file mode 100644
index 620d1bf..0000000
--- a/scripts/gen-go.bat
+++ /dev/null
@@ -1,20 +0,0 @@
-@echo off
-cd /d "%~dp0.."
-set dir=.\gen\go
-set exe=protoc
-set gen=protoc-gen-go
-
-if defined GOPATH set PATH=%PATH%;%GOPATH%\bin
-
-where /q %exe% || echo missing %exe% && exit /B
-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/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-nodejs.bat b/scripts/gen-nodejs.bat
deleted file mode 100644
index c029ab1..0000000
--- a/scripts/gen-nodejs.bat
+++ /dev/null
@@ -1,20 +0,0 @@
-@echo off
-cd /d "%~dp0.."
-set dir=.\gen\nodejs
-set exe=grpc_tools_node_protoc
-set plugin=grpc_tools_node_protoc_plugin
-
-where /q %exe% || echo missing %exe% && exit /B
-where /q %plugin% || echo missing %plugin% && exit /B
-
-for /f %%i in ('where %plugin%') do set pluginPath=%%i
-
-if not exist %dir% mkdir %dir%
-call %exe% -I . --js_out=import_style=commonjs,binary:%dir% --grpc_out=%dir% --plugin=protoc-gen-grpc=%pluginPath% bdledger/api/common.proto
-call %exe% -I . --js_out=import_style=commonjs,binary:%dir% --grpc_out=%dir% --plugin=protoc-gen-grpc=%pluginPath% bdledger/api/error_details.proto
-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.bat b/scripts/gen.bat
new file mode 100644
index 0000000..46092bb
--- /dev/null
+++ b/scripts/gen.bat
@@ -0,0 +1,37 @@
+@echo off
+setlocal EnableDelayedExpansion
+
+cd /d "%~dp0.."
+where /q protoc || echo Missing protoc && exit /b
+set gen=.\gen
+set pkg=bdware/bdledger/api
+set protos=%pkg%/common.proto %pkg%/error_details.proto %pkg%/node.proto %pkg%/ledger.proto %pkg%/query.proto %pkg%/contract.proto
+
+for %%A in (%*) do (
+  if "%%A"=="go" (
+    set plugin=protoc-gen-go
+    where /q !plugin! || echo Missing !plugin! && exit /b
+    set out=%gen%\go
+    if not exist !out! mkdir !out!
+    echo Generating Go code
+    start /b protoc --go_out=plugins=grpc:!out! %protos%
+  )
+  if "%%A"=="nodejs" (
+    set plugin=grpc_tools_node_protoc_plugin
+    where /q !plugin! || echo missing !plugin! && exit /b
+    for /f %%i in ('where !plugin!') do set pluginPath=%%i
+    set out=%gen%\nodejs
+    if not exist !out! mkdir !out!
+    echo Generating Node.js code
+    start /b protoc --js_out=import_style=commonjs,binary:!nout! --grpc_out=!nout! --plugin=protoc-gen-grpc=!pluginPath! %protos%
+  )
+  if "%%A"=="ts" (
+    set plugin=protoc-gen-ts
+    where /q !plugin! || echo missing !plugin! && exit /B
+    for /f %%i in ('where !plugin!') do set pluginPath=%%i
+    set out=%gen%\nodejs
+    if not exist !out! mkdir !out!
+    echo Generating TypeScript definitions
+    start /b protoc --ts_out=!out! --plugin=protoc-gen-ts=!pluginPath! %protos%
+  )
+)
diff --git a/scripts/gen.sh b/scripts/gen.sh
new file mode 100644
index 0000000..69612a0
--- /dev/null
+++ b/scripts/gen.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+cd "${0%/*}/.."
+
+# TODO