add code

README-ABI.md

+# hello-wasm-abi
+
+>本文在 `wasm` 合约中使用 `ABI` 我们假设您已经阅读了 [README.md](https://github.com/WuEcho/ewasm-rust-demo/tree/master/README.md) 并掌握了 `hello-wasm` 例子工程<br>
+>接下来我们会在此基础上加以修改，具体代码放在 `hello-wasm-abi` 目录中<br>
+
+## 定义 ABI
+
+>在 `hello-wasm-abi/src/abi.rs` 中定义了 Contract 对象，包含了 `hello-wasm` 样例中的 <br>
+>`put/get/getcounter` 三个方法的 `ABI` 描述，注意，我们还不能直接用 `JSON` 来描述 `ABI`<br>
+>必须使用 `metavmabi::Contract` 来定义声明；
+
+建议通过以下三步来生成 ABI : 
+
+1. 使用 `solidity` 编写 `contract interface`;
+1. 使用 `remix` 编译 `contract interface` 得到对应的 `ABI` 描述；
+1. 参照 `ABI` 描述文件编写 `metavmabi::Contract`；
+
+部署 wasm 合约后可以使用合约地址和 contract interface 在 remix 里对合约进行实例化，方便测试
+
+### Solidity Contract Interface
+
+在 [Remix IDE](http://remix.ethereum.org/#optimize=false&version=soljson-v0.5.3+commit.10d17f24.js&evmVersion=null&appVersion=0.7.7) 中编写合约接口，并编译
+
+```solidity
+pragma solidity ^0.5.3;
+
+contract hello_wasm_abi {
+    function getcounter() public view returns(uint256);
+    function get(string memory key) public view returns(string memory);
+    function put(string memory key,string memory val) public payable;
+}               
+```
+
+### JSON ABI
+
+编译合约接口可以得到对应的 `ABI JSON` 描述，提供合约地址和此 `JSON ABI` 文档，
+`DAPP` 开发者即可实例化 `hello_wasm_abi` 合约，并使用其中的三个函数
+
+```json
+[
+	{
+		"constant": false,
+		"inputs": [
+			{
+				"name": "key",
+				"type": "string"
+			},
+			{
+				"name": "val",
+				"type": "string"
+			}
+		],
+		"name": "put",
+		"outputs": [],
+		"payable": true,
+		"stateMutability": "payable",
+		"type": "function"
+	},
+	{
+		"constant": true,
+		"inputs": [
+			{
+				"name": "key",
+				"type": "string"
+			}
+		],
+		"name": "get",
+		"outputs": [
+			{
+				"name": "",
+				"type": "string"
+			}
+		],
+		"payable": false,
+		"stateMutability": "view",
+		"type": "function"
+	},
+	{
+		"constant": true,
+		"inputs": [],
+		"name": "getcounter",
+		"outputs": [
+			{
+				"name": "",
+				"type": "uint256"
+			}
+		],
+		"payable": false,
+		"stateMutability": "view",
+		"type": "function"
+	}
+]
+```
+
+### metavmabi::Contract
+
+根据 `JSON ABI` 描述实例化 `metavmabi::Contract` 对象，用来对合约的 `input/output` 进行序列化和反序列化
+
+```rust
+pub fn get_contract_abi() -> metavmabi::Contract {
+    let mut functions: HashMap<String, metavmabi::Function> = HashMap::new();
+    let fn_put = metavmabi::Function {
+        constant: false,
+        name: String::from("put"),
+        inputs: Vec::from(vec![
+            metavmabi::Param { name: String::from("key"), kind: metavmabi::param_type::ParamType::String },
+            metavmabi::Param { name: String::from("val"), kind: metavmabi::param_type::ParamType::String },
+        ]),
+        outputs: Vec::default(),
+    };
+    let fn_get = metavmabi::Function {
+        constant: true,
+        name: String::from("get"),
+        inputs: Vec::from(vec![
+            metavmabi::Param { name: String::from("key"), kind: metavmabi::param_type::ParamType::String },
+        ]),
+        outputs: Vec::from(vec![
+            metavmabi::Param { name: String::default(), kind: metavmabi::param_type::ParamType::String },
+        ]),
+    };
+    let fn_getcounter = metavmabi::Function {
+        constant: true,
+        name: String::from("getcounter"),
+        inputs: Vec::default(),
+        outputs: Vec::from(vec![
+            metavmabi::Param { name: String::default(), kind: metavmabi::param_type::ParamType::Uint(256) },
+        ]),
+    };
+    functions.insert(fn_put.clone().name, fn_put.clone());
+    functions.insert(fn_get.clone().name, fn_get.clone());
+    functions.insert(fn_getcounter.clone().name, fn_getcounter.clone());
+    metavmabi::Contract {
+        constructor: None,
+        functions: functions,
+        events: HashMap::default(),
+        fallback: false,
+        signers: HashMap::default(),
+    }
+}
+```
+## 使用 `ABI`
+
+>在 hello-wasm-abi 合约中
+
+```rust
+extern crate wasm_bindgen;
+extern crate ewasm_api;
+
+use wasm_bindgen::prelude::*;
+use ewasm_api::types::*;
+use ewasm_api::metavm::utils::*;
+
+// 倒入处理 abi 的开发库
+use ewasm_api::metavmabi;
+// metavmabi::Contract 定义的对象放在 abi 模块中
+pub mod abi;
+
+const COUNTER_KEY: Bytes32 = Bytes32 { bytes: [255; 32] };
+
+fn inc_counter() {
+    let old_v = ewasm_api::storage_load(&COUNTER_KEY);
+    let old_i = bytes_to_uint(&old_v.bytes[..]);
+    let new_i = old_i + 1;
+    let val = u32_to_bytes32(new_i as u32);
+    let value = Bytes32 { bytes: val };
+    ewasm_api::storage_store(&COUNTER_KEY, &value);
+}
+
+fn get_counter() -> Vec<u8> {
+    let v = ewasm_api::storage_load(&COUNTER_KEY);
+    Vec::from(&v.bytes[..])
+}
+
+fn put_data(k: String, v: String) {
+    ewasm_api::metavm::storage_store(k.as_bytes(), v.as_bytes());
+}
+
+fn get_data(k: String) -> Vec<u8> {
+    ewasm_api::metavm::storage_load(k.as_bytes())
+}
+
+#[wasm_bindgen]
+pub fn main() {
+    inc_counter();
+    let input = ewasm_api::calldata_acquire();
+    if !input.is_empty() {
+    	// 获取 metavmabi::Contract 对象，这个函数写在 abi 模块中
+        let mut contract = abi::get_contract_abi();
+	// 从 input 获取方法签名，按照 ABI 规范，input 的前 4 个 byte 为方法签名
+	let fn_sig = &Vec::from(&input[..4]);
+	// 根据方法签名获取 function 对象
+        let function = contract.function_by_sig(fn_sig).expect("error_fn_sig");
+	// 通过 function.name 来匹配相应的 handler
+	match function.name.as_str() {
+            "getcounter" => { // function getcounter() public view returns(uint256);
+	    	// 调用 get_counter 得到返回值，转换成 uint
+                let rtn = ewasm_api::metavm::utils::bytes_to_uint(get_counter().as_slice());
+		// 此方法没有输入值，只有输出，通过 function.encode_output 序列化输出 
+		let data = function.encode_output(&[metavmabi::Token::Uint(rtn.into())]).unwrap();
+		// 将结果返回给合约调用者
+		ewasm_api::finish_data(data.as_slice());
+            }
+            "get" => { // function get(string memory key) public view returns(string memory);
+		// 此方法有定义输入 string key , 先用 function.decode_input 解析 input, 得到输入列表	    
+                let tokens = function.decode_input(input.as_slice()).expect("error_put_input");
+		// 接口中 input 只定义了一个参数，所以 key = tokens[0]
+                let key = tokens.get(0).expect("error_put_key");
+		// 调用 get_data(key) 函数，得到 val 的字节数组
+                let val = get_data(key.clone().to_string().unwrap());
+		// 接口描述输出值为 string，所以要将 val 转换为 string
+		let rtn = String::from_utf8(val).expect("error_get_val");
+		// 使用 function.encode_output 对返回值进行序列化
+                let data = function.encode_output(&[metavmabi::Token::String(rtn)]).expect("error_get_output");
+		// 将结果返回给合约调用者
+                ewasm_api::finish_data(data.as_slice());
+            }
+            "put" => { // function put(string memory key,string memory val) public payable;
+	    	// 此方法有定义输入 [string key,string val] , 先用 function.decode_input 解析 input, 得到输入列表
+                let tokens = function.decode_input(input.as_slice()).expect("error_put_input");
+		// 接口中定义了两个参数，分别对应 key = tokens[0] , val = tokens[1]
+                let key = tokens.get(0).expect("error_put_key");
+                let val = tokens.get(1).expect("error_put_val");
+		// 调用 put_data(key,val)
+                put_data(key.clone().to_string().unwrap(), val.clone().to_string().unwrap());
+		// 结束调用，此方法没有返回值
+		ewasm_api::finish()
+            }
+            _ => ewasm_api::finish() // 如果方法匹配失败，则直接返回不做任何处理
+        }
+    }
+}
+```
+## 部署与使用
+
+* 部署合约方式与 `hello-wasm` 样例相同，可以参照 [README.md](https://github.com/WuEcho/ewasm-rust-demo/tree/master/README.md) 中关于`部署`的描述;
+
+* 调用合约：部署成功后会得到 `Contract Address` ，如果使用 `web3` 系列 `SDK` 可以使用 `JSON ABI` + `Contract Address` 来实例化合约，并进行调用，如果使用 `remix IDE` 进行测试调用，可以使用 `Solidity Contract Interface` + `Contract Address` 来实例化合约并调用
+
+关于 web3 提供的 SDK 和 remix IDE 的详细资料请参阅 web3 基金会的相关资料
+
+
+## Solidity 调用 Wasm 合约
+
+用 `sol` 合约来调用 `wasm` 合约，与 `sol` 调用 `sol` 方式相同，
+假设已经部署过 `hello-wasm-abi` 这个合约，并得到合约地址 `0xda3df11d916ffba3a1289cef66a7f142ec5d0f76`,
+通过 `hello-wasm-abi` 合约接口和地址，即可实例化这个合约，之后用法与 `sol` 调用 `sol` 一致，
+例如：
+
+```solidity
+pragma solidity ^0.5.3;
+
+// hello-wasm-abi 合约接口
+contract hello_wasm_abi {
+    function getcounter() public view returns(uint256);
+    function get(string memory key) public view returns(string memory);
+    function put(string memory key,string memory val) public payable;
+}        
+
+// 使用 hello-wasm-abi 合约的 solidity 合约
+contract foobar {
+    
+    function fetch(address addr,string memory key) public view returns(string memory) {
+    	// 第一个参数 addr 为 wasm 合约地址，通过接口和地址实例化合约对象
+        hello_wasm_abi hello = hello_wasm_abi(addr);
+	// 调用 wasm 合约方法
+        return hello.get(key);
+    }
+    
+    function set(address addr,string memory key,string memory val) public payable {
+        hello_wasm_abi hello = hello_wasm_abi(addr);
+        hello.put(key,val);
+    }
+
+}
+```
+
+部署 `foobar` 合约后，使用 `hello-wasm-abi` 的合约地址 `0xda3df11d916ffba3a1289cef66a7f142ec5d0f76` 作为第一个参数分别
+调用 `fetch` 和 `set` 方法，完成对 `hello-wasm-abi` 合约的 `get` 和 `put` 的调用。 
+
+
+

README.md

+
+## 合约开发规范
+
+ewasm 合约接口规范由以太坊定制，指定模块结构等信息，MetaVM 严格遵循此规范，具体如下
+
+### 数据类型
+
+禁止使用浮点数，兼容 evm 中规定的数据类型，例如：
+
+* bytes : 不定长字节数组
+* address : 160 bit 数字，在内存中以 20字节 小字节无符号整型表示
+* u128 : 128 bit 数字，在内存中以 16字节 小字节无符号整型表示
+* u256 : 256 bit 数字，在内存中以 32字节 小字节无符号整型表示
+
+### 格式
+
+每个合约必须存储为 wasm 字节码
+
+### 导入模块
+
+规定合约 `import` 的范围仅限于 [EEI](https://github.com/ewasm/design/blob/master/eth_interface.md) 提供的模块，`ethereum` 名称空间以外的包只允许使用 `debug` ，在生产环境中 `debug` 也应被禁止使用
+
+### 导出函数 
+
+每个合约必须导出两个函数(只能导出两个函数)
+
+* memory : 可供 [EEI](https://github.com/ewasm/design/blob/master/eth_interface.md) 写入的共享内存
+* main : 一个入口函数，没有参数也没有返回值，将被 VM 执行
+
+要关闭 `wasm` 的 `start function` 功能，开启它会影响 `ewasm` 在启动前获取合约内存地址指针的功能
+
+
+### 关于 ABI
+
+>我们看到有关导出函数的规定与 `solidity` 合约中定义的 `ABI` 有些不一样，<br>
+>`solidity` 合约根据方法签名来生成相应的 `ABI` 以便对合约中的函数进行调度，<br>
+>这在 `ewasm` 看来似乎行不通，因为只有一个 `main` 函数被导出了， <br>
+>如何使用 `main` 函数之外的函数呢？我们很自然就想到了使用合约的 `input` 来 <br>
+>定义目标方法和输入参数，事实上 `solidity` 也是这么做的，只是我们把这个灵活性 <br>
+>交还给开发者实现，以统一的 `main` 函数作为入口，然后自行封装 `input` 序列化方案，<br>
+>在后面的例子中我们可以看到更加灵活的方式。<br>
+
+
+
+## 开发环境安装
+
+MetaVM 使用 rust 作为 ewasm 合约开发语言，并通过 rust 工具链对合约进行编译，具体安装与使用流程如下
+
+1. 安装 rustup
+
+```
+curl https://sh.rustup.rs -sSf | sh
+```
+
+>注意，在安装脚本执行时要选择 `nightly` 频道，否则无法完成后续工具安装 
+>安装时如果 path 处理失败，需要手动加载一下环境变量 : `source $HOME/.cargo/env`
+
+
+2. 安装 rust 标准库
+
+```
+rustup component add rust-src
+```
+
+3. 安装 wasm-pack 编译工具
+
+```
+curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+```
+
+4. 安装 wasm 后期处理工具
+
+```bash
+$> git clone https://github.com/WuEcho/wasm-chisel.git
+$> cd wasm-chisel
+$> cargo build --release
+```
+
+编译成功后会在 `target/release` 目录下找到 `chisel` 程序，确保将其复制到 `$PATH` 目录
+
+
+__有关 Rust 更多内容请参考：__
+
+https://www.rust-lang.org/zh-CN/learn/get-started
+
+
+## WASM 样例合约 
+
+此步骤之前请确保合约开发环境已经安装完成，我们接下来会用到 `cargo` 创建合约，
+使用 `wasm-pack` 来编译合约，使用 `chisel` 对合约进行后期处理
+
+### 创建 hello-wasm 合约
+
+假设工作目录为 `/Users/wuxinyang/Desktop/MyGo/src/rust` ，在终端下进入目录
+
+```bash
+$> cargo new --lib hello-wasm
+$> cd hello-wasm
+$> touch chisel.yml
+```
+
+编辑 `chisel.yml` 文件，填入下文中的内容，其中 `file` 属性为 `hello-wasm` 合约编译后产生的二进制文件：
+
+```yml
+hello:
+  file: "/Users/wuxinyang/Desktop/MyGo/src/rust/hello_wasm_bg.wasm"
+  remapimports:
+    preset: "ewasm"
+  trimexports:
+    preset: "ewasm"
+  verifyimports:
+    preset: "ewasm"
+  verifyexports:
+    preset: "ewasm"
+  repack:
+    preset: "ewasm"
+``` 
+
+### 添加依赖
+
+一个 `wasm` 合约至少要依赖两个开发包，`ewasm-rust-api` 和 `wasm-bindgen` ，
+前者提供 `api` 与 MetaVm 交互，后者负责编译 rust 为 wasm ; 
+
+`MetaVm` 对 `eei` 进行了扩展，需要使用 `MetaVm` 提供的 `ewasm-rust-api`
+
+编辑 `hello-wasm/Cargo.toml` 文件，添加依赖到 `dependencies` 下，并且配置 `profile.release` 以优化编译结果
+
+```toml
+[package]
+name = "hello-wasm"
+version = "0.1.0"
+authors = ["WuEcho <emailforecho@163.com>"]
+edition = "2022"
+publish = false
+
+[dependencies]
+wasm-bindgen = "0.2"
+ewasm_api = { git = "https://github.com/WuEcho/ewasm-rust-api", tag = "0.9" }
+
+[lib]
+crate-type = ["cdylib"]
+
+[profile.release]
+opt-level = 'z'
+debug = false
+rpath = false
+debug-assertions = false
+codegen-units = 1
+lto = true
+```
+
+使用 `cargo check` 检查并下载依赖
+
+```bash
+$> cargo check
+    Updating crates.io index
+   Compiling proc-macro2 v0.4.30
+   Compiling unicode-xid v0.1.0
+   Compiling syn v0.15.42
+   Compiling wasm-bindgen-shared v0.2.48
+   Compiling log v0.4.8
+   Compiling cfg-if v0.1.9
+   Compiling lazy_static v1.3.0
+   Compiling libc v0.2.60
+   Compiling bumpalo v2.5.0
+    Checking void v1.0.2
+   Compiling wee_alloc v0.4.4
+   Compiling wasm-bindgen v0.2.48
+    Checking memory_units v0.4.0
+    Checking unreachable v1.0.0
+    Checking ewasm_api v0.9.1 
+   Compiling quote v0.6.13
+   Compiling wasm-bindgen-backend v0.2.48
+   Compiling wasm-bindgen-macro-support v0.2.48
+   Compiling wasm-bindgen-macro v0.2.48
+    Checking hello-wasm v0.1.0 (/Users/wuxinyang/Desktop/MyGo/src/rust/hello-wasm)
+    Finished dev [unoptimized + debuginfo] target(s) in 16.90s
+```
+
+### 编写合约代码
+
+至此合约的开发工作已经准备完毕，接下来我们将在合约中实现 `put / get` 函数，以及一个简单的计数器
+用来演示通过合约存储 `k/v` 值并根据 `k` 获取值，以及如何通过 `contract.input` 来进行不同函数的调度
+
+编辑 `hello-wasm/src/lib.rs` 添加合约代码 
+
+```rust
+use wasm_bindgen::prelude::*;
+use ewasm_api::types::*;
+use ewasm_api::metavm::utils::*;
+
+// 为 counter 定义一个 32位的 key
+const COUNTER_KEY: Bytes32 = Bytes32 { bytes: [255; 32] };
+
+// 每次方法被调用时都会执行一个 counter++ 操作，在链上记录执行次数，以测试状态写入操作
+// EEI 函数回调 storageLoad / storageStore
+fn inc_counter() {
+    // storage_load 为 eei 中提供的函数，约束 k/v 均为 32byte 
+    // 此处将获取 key 对应的 Bytes32 类型的 value
+    let old_v = ewasm_api::storage_load(&COUNTER_KEY);
+    // 此方法由 ewasm_api::metavm::utils 名称空间所提供
+    // 用来将 32 byte 字节数组转换为对应的整型
+    let old_i = bytes_to_uint(&old_v.bytes[..]);
+    let new_i = old_i + 1;
+    // 此方法由 ewasm_api::metavm::utils 名称空间所提供
+    // 用来将 uint32 转换为 32 byte 数组
+    let val = u32_to_bytes32(new_i as u32);
+    let value = Bytes32 { bytes: val };
+    // storage_store 为 eei 中提供的函数，约束 k/v 均为 32byte
+    // 用来保存 k/v 到当前合约的状态库
+    ewasm_api::storage_store(&COUNTER_KEY, &value);
+}
+
+
+// EEI 函数回调 storageLoad
+fn get_counter() {
+    let v = ewasm_api::storage_load(&COUNTER_KEY);
+    // 如果想将合约的执行结果返回给调用方，不需要使用 return 也无需在方法签名中指明
+    // 必须使用 eei 中规定的 finish_data 函数
+    ewasm_api::finish_data(&v.bytes[..]);
+}
+
+fn put_data() {
+    // input 格式为 "put:key,value"
+    let input = ewasm_api::calldata_acquire();
+    let data = String::from_utf8(input).expect("error_params");
+    // 将 input 分割为 ["put","key,value"]
+    let sd: Vec<&str> = data.split(":").collect();
+    if sd.len() > 1 {
+        // 将 "key,value" 分割为 ["key","value"]
+        let sp: Vec<&str> = sd[1].split(",").collect();
+        if sp.len() > 1 {
+            let k = sp[0].trim();
+            let v = sp[1].trim();
+            // storage_store 为 metavm 提供的扩展函数
+            // 用来将不限制大小的 key / value 保存在合约状态中
+            // 值得注意的是此方法的 gas 是以数据大小来计算的
+            // 每 32byte 数据所使用的 gas 与 storage_store 相同
+            ewasm_api::metavm::storage_store(k.as_bytes(), v.as_bytes());
+        }
+    }
+}
+
+fn get_data() {
+    // input 格式为 "get:key"
+    let input = ewasm_api::calldata_acquire();
+    let data = String::from_utf8(input).expect("error_params");
+    // 将 input 分割为 ["get","key"]
+    let sd: Vec<&str> = data.split(":").collect();
+    if sd.len() > 1 {
+        let k = sd[1].trim();
+        // storage_load 为 metavm 提供的扩展函数
+        // 用来获取 key 对应的不限制大小的 value
+        // 值得注意的是此方法的 gas 是以数据大小来计算的
+        // 每 32byte 数据所使用的 gas 与 storage_store 相同
+        let v: Vec<u8> = ewasm_api::metavm::storage_load(k.as_bytes());
+        // 将合约执行结果返回给调用端
+        ewasm_api::finish_data(&v[..]);
+    }
+}
+
+
+//fn constructor() {}
+
+// 同 solidity 中的匿名函数，每次给这个合约转账时都会回调这个函数
+// 如果需要使用匿名函数在收到转账时做特殊处理，则可实现这个函数 
+fn anonymous() {
+    // TODO 不需要返回任何值
+    
+}
+
+// 合约入口 : 必须使用 #[wasm_bindgen] 注解来声明导出 main 函数
+#[wasm_bindgen]
+pub fn main() {
+    // 当合约通过 tx 调用时表示需要改变状态，此时计数器会加一，否则无效
+    inc_counter();
+    // 获取本次合约调用的 contract.input
+    let input = ewasm_api::calldata_acquire();
+    // 当 create 合约时 input 始终为空
+    // 当给合约发送普通转账交易时，input 也应为空
+    if !input.is_empty() {
+        // 本 demo 使用了文本协议来序列化 input
+        // 格式为: "目标函数:参数1,参数2,参数n"
+        // 解析
+        let data = match String::from_utf8(input) {
+            Ok(s) => s,
+            Err(e) => e.to_string(),// 也可以在此处终止合约
+        };
+        // 将 input 分割为 ["目标函数","参数1,参数2,参数n"]
+        let sd: Vec<&str> = data.split(":").collect();
+        // 通过这个匹配可以看出我们这个合约对外暴漏 3 个函数，函数名称不区分大小写：
+        //      GETCOUNTER : 通过 eth_call 调用，用来获取计数器结果
+        //      PUT : 通过 tx 向合约中添加一个 k/v 对，具体参数格式为 "put:k,v"
+        //      GET : 通过 eth_call 调用，获取 k 对应的 v，具体参数格式为 "get:k"
+        // 当方法名得不到匹配时，会返回 "METHOD_NOT_FOUND" 标识
+        match sd[0].trim().to_uppercase().as_str() {
+            "GETCOUNTER" => get_counter(),
+            "PUT" => put_data(),
+            "GET" => get_data(),
+            _ => ewasm_api::finish_data(String::from("METHOD_NOT_FOUND").as_bytes()),
+        }
+    } else {
+        // 当 input 为空时，调度匿名函数
+        anonymous();
+    }
+}
+```
+
+
+### 编译合约
+
+在控制台进入 `hello-wasm` 工程目录，编译并完成后期处理
+
+```bash
+$> wasm-pack build
+$> chisel run
+```
+
+以上步骤将在 `/Users/wuxinyang/Desktop/MyGo/src/rust` 目录中得到 `hello_wasm_bg.wasm` 文件，接下来我们去链上部署这份合约
+
+### 哨兵合约示例
+
+ rust代码 https://github.com/ewasm/sentinel-rs
+ solodity代码 https://github.com/ewasm/sentinel-governance
+
+### 部署以及调用
+
+以构造交易体并发送交易给链上的方式进行部署，构造交易的代码如下：
+
+```go
+import (
+"github.com/ethereum/go-ethereum/ethclient"
+"github.com/ethereum/go-ethereum/core/types"
+"github.com/ethereum/go-ethereum/common"
+"testing"
+"io/ioutil"
+"encoding/hex"
+)
+func TestDeploy(t *testing.T) {
+	fp := "/Users/wuxinyang/Desktop/MyGo/src/rust/hello-wasm/pkg/hello_wasm_bg.wasm"
+	ctx := context.Background()
+	code, err := ioutil.ReadFile(fp)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	t.Log(code)
+	t.Log(hex.EncodeToString(code))
+	client, err := ethclient.Dial(ipc)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	nonce, err := client.PendingNonceAt(ctx, addr)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	tx, _ := types.SignTx(
+		types.NewContractCreation(
+			nonce,
+			new(big.Int),
+			11826015,                                          //gasLimit
+			new(big.Int).Mul(big.NewInt(1e9), big.NewInt(18)), // gasPrice
+			code),
+		signer,
+		prvKey)
+	t.Log(nonce, tx)
+	err = client.SendTransaction(ctx, tx)
+	t.Log(err, len(code), tx.Hash().Hex())
+}
+
+//调用方法
+func TestCall(t *testing.T) {
+	to := common.HexToAddress("0xda3df11d916ffba3a1289cef66a7f142ec5d0f76")
+	ctx := context.Background()
+	client, err := ethclient.Dial(ipc)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	nonce, err := client.PendingNonceAt(ctx, addr)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	_tx := types.NewTransaction(
+		nonce,
+		to,
+		big.NewInt(1),
+		params.GenesisGasLimit,                            // gasLimit
+		new(big.Int).Mul(big.NewInt(1e9), big.NewInt(18)), // gasPrice
+		[]byte("put:helloworld,wuecho@163.com"))
+	//get:helloworld
+	tx, _ := types.SignTx(_tx, signer, prvKey)
+	t.Log(nonce, tx)
+	err = client.SendTransaction(ctx, tx)
+	t.Log(err, tx.Hash().Hex())
+
+}
+```
+
+
+

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hello-wasm-abi/Cargo.toml

+[package]
+name = "hello-wasm"
+version = "0.1.0"
+edition = "2021"
+authors = ["WuEcho <emailforecho@163.com>"]
+publish = false
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+wasm-bindgen = "0.2"
+ewasm_api = { git = "https://github.com/WuEcho/ewasm-rust-api", tag = "0.9" }
+
+[lib]
+crate-type = ["cdylib"]
+
+[profile.release]
+opt-level = 'z'
+debug = false
+rpath = false
+debug-assertions = false
+codegen-units = 1
+lto = true

hello-wasm-abi/chisel.yml

+hello:
+  file: "/Users/wuxinyang/Desktop/MyGo/src/rust/hello_wasm_bg.wasm"
+  remapimports:
+    preset: "ewasm"
+  trimexports:
+    preset: "ewasm"
+  verifyimports:
+    preset: "ewasm"
+  verifyexports:
+    preset: "ewasm"
+  repack:
+    preset: "ewasm"
+

hello-wasm-abi/src/lib.rs

+extern crate wasm_bindgen;
+extern crate ewasm_api;
+
+use wasm_bindgen::prelude::*;
+use ewasm_api::types::*;
+use ewasm_api::metavm::utils::*;
+use ewasm_api::metavmabi;
+
+pub mod abi;
+
+const COUNTER_KEY: Bytes32 = Bytes32 { bytes: [255; 32] };
+
+fn inc_counter() {
+    let old_v = ewasm_api::storage_load(&COUNTER_KEY);
+    let old_i = bytes_to_uint(&old_v.bytes[..]);
+    let new_i = old_i + 1;
+    let val = u32_to_bytes32(new_i as u32);
+    let value = Bytes32 { bytes: val };
+    ewasm_api::storage_store(&COUNTER_KEY, &value);
+}
+
+fn get_counter() -> Vec<u8> {
+    let v = ewasm_api::storage_load(&COUNTER_KEY);
+    Vec::from(&v.bytes[..])
+}
+
+fn put_data(k: String, v: String) {
+    ewasm_api::metavm::storage_store(k.as_bytes(), v.as_bytes());
+}
+
+fn get_data(k: String) -> Vec<u8> {
+    ewasm_api::metavm::storage_load(k.as_bytes())
+}
+
+#[wasm_bindgen]
+pub fn main() {
+    inc_counter();
+    let input = ewasm_api::calldata_acquire();
+    if !input.is_empty() {
+        let mut contract = abi::get_contract_abi();
+	let fn_sig = &Vec::from(&input[..4]);
+        let function = contract.function_by_sig(fn_sig).expect("error_fn_sig");
+	match function.name.as_str() {
+            "getcounter" => { // function getcounter() public view returns(uint256);
+                let rtn = ewasm_api::metavm::utils::bytes_to_uint(get_counter().as_slice());
+		let data = function.encode_output(&[metavmabi::Token::Uint(rtn.into())]).unwrap();
+		ewasm_api::finish_data(data.as_slice());
+            }
+            "get" => { // function get(string memory key) public view returns(string memory);	    
+                let tokens = function.decode_input(input.as_slice()).expect("error_put_input");
+                let key = tokens.get(0).expect("error_put_key");
+                let val = get_data(key.clone().to_string().unwrap());
+		let rtn = String::from_utf8(val).expect("error_get_val");
+                let data = function.encode_output(&[metavmabi::Token::String(rtn)]).expect("error_get_output");
+                ewasm_api::finish_data(data.as_slice());
+            }
+            "put" => { // function put(string memory key,string memory val) public payable;
+                let tokens = function.decode_input(input.as_slice()).expect("error_put_input");
+                let key = tokens.get(0).expect("error_put_key");
+                let val = tokens.get(1).expect("error_put_val");
+                put_data(key.clone().to_string().unwrap(), val.clone().to_string().unwrap());
+		ewasm_api::finish()
+            }
+            _ => ewasm_api::finish() 
+        }
+    }
+}
+

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+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.87"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54681b18a46765f095758388f2d0cf16eb8d4169b639ab575a8f5693af210c7b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.87"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"
+
+[[package]]
+name = "wee_alloc"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbb3b5a6b2bb17cb6ad44a2e68a43e8d2722c997da10e928665c72ec6c0a0b8e"
+dependencies = [
+ "cfg-if 0.1.10",
+ "libc",
+ "memory_units",
+ "winapi",
+]
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

hello-wasm/Cargo.toml

+[package]
+name = "hello-wasm"
+version = "0.1.0"
+edition = "2021"
+authors = ["WuEcho <emailforecho@163.com>"]
+publish = false
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+wasm-bindgen = "0.2"
+ewasm_api = { git = "https://github.com/WuEcho/ewasm-rust-api", tag = "0.9" }
+
+[lib]
+crate-type = ["cdylib"]
+
+[profile.release]
+opt-level = 'z'
+debug = false
+rpath = false
+debug-assertions = false
+codegen-units = 1
+lto = true

hello-wasm/chisel.yml

+hello:
+  file: "/Users/wuxinyang/Desktop/MyGo/src/rust/hello_wasm_bg.wasm"
+  remapimports:
+    preset: "ewasm"
+  trimexports:
+    preset: "ewasm"
+  verifyimports:
+    preset: "ewasm"
+  verifyexports:
+    preset: "ewasm"
+  repack:
+    preset: "ewasm"
+

hello-wasm/src/lib.rs

+use wasm_bindgen::prelude::*;
+use ewasm_api::types::*;
+use ewasm_api::metavm::utils::*;
+
+const COUNTER_KEY: Bytes32 = Bytes32 { bytes: [255; 32] };
+
+fn inc_counter() {
+    let old_v = ewasm_api::storage_load(&COUNTER_KEY);
+    let old_i = bytes_to_uint(&old_v.bytes[..]);
+    let new_i = old_i + 1;
+    let val = u32_to_bytes32(new_i as u32);
+    let value = Bytes32 { bytes: val };
+    ewasm_api::storage_store(&COUNTER_KEY, &value);
+}
+
+fn get_counter() {
+    let v = ewasm_api::storage_load(&COUNTER_KEY);
+    ewasm_api::finish_data(&v.bytes[..]);
+}
+
+fn put_data() {
+    let input = ewasm_api::calldata_acquire();
+    let data = String::from_utf8(input).expect("error_params");
+    let sd: Vec<&str> = data.split(":").collect();
+    if sd.len() > 1 {
+        let sp: Vec<&str> = sd[1].split(",").collect();
+        if sp.len() > 1 {
+            let k = sp[0].trim();
+            let v = sp[1].trim();
+            ewasm_api::metavm::storage_store(k.as_bytes(), v.as_bytes());
+        }
+    }
+}
+
+fn get_data() {
+    let input = ewasm_api::calldata_acquire();
+    let data = String::from_utf8(input).expect("error_params");
+    let sd: Vec<&str> = data.split(":").collect();
+    if sd.len() > 1 {
+        let k = sd[1].trim();
+        let v: Vec<u8> = ewasm_api::metavm::storage_load(k.as_bytes());
+        ewasm_api::finish_data(&v[..]);
+    }
+}
+ 
+fn anonymous() {
+    
+}
+
+#[wasm_bindgen]
+pub fn main() {
+    inc_counter();
+    let input = ewasm_api::calldata_acquire();
+    if !input.is_empty() {
+        let data = match String::from_utf8(input) {
+            Ok(s) => s,
+            Err(e) => e.to_string(),
+        };
+        let sd: Vec<&str> = data.split(":").collect();
+        match sd[0].trim().to_uppercase().as_str() {
+            "GETCOUNTER" => get_counter(),
+            "PUT" => put_data(),
+            "GET" => get_data(),
+            _ => ewasm_api::finish_data(String::from("METHOD_NOT_FOUND").as_bytes()),
+        }
+    } else {
+        anonymous();
+    }
+}
+