手把手教你使用Lity编写和运行智能合约

发表于

快速入门

准备工作

本电脑系统：macOS Mojave 10.14 / 8G 1.8 GHz Intel Core i5

本文档是Cyber Miles的高级开发语言Lity版的”Hello Word”

操作过程中有任何问题需要帮助的，见文章底部

安装好：git ，homebrew ， cmake （老鸟如果已安装，请跳过)

1.1 安装homebrew：

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ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

测试brew安装是否成功：

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brew help

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1.2 安装Git：

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brew install git

1.3 安装cmake：

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brew install cmake

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==准备工作完成后，开始安装Lity==

2.1安装lity

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git clone https://github.com/CyberMiles/lity.git

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安装完成后，依次输入

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cd lity
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mkdir build
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source ./scripts/install_

(这里如果有问题，请看备注)

图片5.图片6

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==显示“进程已完成”后，重新新建一个标签，输入以下代码。==

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依次输入

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cd build
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cmake ..

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安装成功
继续输入

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make

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检查是否成功

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./lityc/lityc --help

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2. 运行私有链(启动CyberMiles节点)

2.1.安装docker: https://docs.docker.com/docker-for-mac/install/

使用brew下载并安装

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brew cask install docker

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2.2在lauchpad中找到小🐳点击运行

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运行成功小图标
附手动下载地址： https://download.docker.com/mac/stable/Docker.dmg

2.3.检查Docker安装成功
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docker run hello-world

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2.4 运行travis: https://travis.readthedocs.io/en/latest/getting-started.html#use-docker

使用docker下载travis的image

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docker run --rm -v ~/volumes/local:/travis cybermiles/travis node init --home /travis

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2.5 使用docker运行
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travis
docker run --name travis -v ~/volumes/local:/travis -t -p 26657:26657 -p 8545:8545 cybermiles/travis node start --home /travis

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2.6 新开个终端，检测链上变化：
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docker logs -f travis

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2.7 再新建一个窗口，连接cybermiles节点：
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docker inspect -f '{{ .NetworkSettings.IPAddress }}' travis

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2.8 使用docker运行本地节点
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docker run --rm -it cybermiles/travis attach http://172.17.0.2:8545

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3.1 准备账户

准备账户，在上一个窗口继续输入

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cmt.accounts

或者

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personal.listAccounts

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3.2查看账户信息：
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cmt.getBalance(cmt.accounts[0])

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3.3 创建账户 CMT100为新账户的密码
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personal.newAccount('CMT100')

运行截图31

3.4 给新账户转账
查看用户列表

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personal.listAccounts

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3.4 解锁账户
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personal.unlockAccount("0x7eff122b94897ea5b0e2a9abf47b86337fafebdc","1234");

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3.5给新建的账户地址转账
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cmt.sendTransaction({from: '0x7eff122b94897ea5b0e2a9abf47b86337fafebdc', to: '0xc1f9378552bd55b29733f0915d8311071ed4143e', value: web3.toWei(99, 'cmt')});
3.6查看账户信息
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cmt.getBalance(cmt.accounts[2])

显示“9900000000000000”

3.7 解锁自己创建的账户
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personal.unlockAccount(cmt.accounts[2],’CMT100')

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3.8编写合约代码

新建终端 在==lity/build== 下创建

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vi hello.lity

写入内容：

pragma solidity ^0.4.23;
contract ReverseContract {
function reverse(string input) public returns(string) {
string memory output = eni(“reverse”, input);
return output;
}
}

写入内容后，保存

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3.9 用lityc将源代码编译为字节代码

分别输入

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./lityc/lityc --bin hello.lity

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./lityc/lityc --abi hello.lity

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4. 部署合约

4.1解锁账户

回到docker run 的终端窗口
输入：

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personal.unlockAccount(cmt.accounts[2],'CMT100');

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4.2定义abi变量

ABI变量内容

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var helloContract=web3.cmt.contract([{"constant":false,"inputs":[{"name":"input","type":"string"}],"name":"reverse","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]);

显示“undefined”

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5.部署合约

5.1继续在连接本地节点终端窗口输入：

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var hello = helloContract.new(
...    {
......      from: web3.cmt.accounts[3], 
......      data: '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', 
......      gas: '4700000'
......    }, function (e, contract){
......     console.log(e, contract);
......     if (typeof contract.address !== 'undefined') {
.........          console.log('Contract mined! address: ' + contract.address + ' transactionHash: ' + contract.transactionHash);
.........     }
......  });

如果时间超时，需要重新解锁。

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personal.unlockAccount(cmt.accounts[2],'CMT100')
5.2调用合约
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hello.reverse.call("hello,atao!",{from:cmt.accounts[2]});

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笔记：

  1. if you see this:
    Error: An unexpected error occurred during the brew link step
    The formula built, but is not symlinked into /usr/local
    Permission denied @ dir_s_mkdir - /usr/local/Frameworks
    Error: Permission denied @ dir_s_mkdir - /usr/local/Frameworks
    then do this:
    sudo chown -R $(whoami) $(brew –prefix)/
    note the $(brew –prefix)/     …High Sierra doesn’t allow you to change permissions on /user/local directly)
    sudo install -d -o $(whoami) -g admin /usr/local/Frameworks
    Last: source ./script/install_deps.sh

有任何问题可以加QQ解决：

QQ群1：832462204
QQ群2：875719854

CM官方文档：https://travis.readthedocs.io/en/latest/getting-started.html

Lity：https://www.litylang.org/gas/

lity入门： https://lity.readthedocs.io

libENI: https://libeni.readthedocs.io/en/latest/

Github：https://github.com/CyberMiles/lity

WEB3-CMT.JS: https://cybermiles.github.io/web3-cmt.js/api/

lity开发入门指南（有视频）：https://dwz.cn/qDs8XQOt

如何利用Lity创新（有视频）：https://dwz.cn/B63y9P1R

Lity如何防止合约错误：https://dwz.cn/4jMiQz5q

欢迎各位开发者到Github上提问，把有价值的问题留存下来，以便后面的开发者可以快速解决问题。

草莓100，别墅靠海.