以太坊研究系列【私链合约发布】
最近需要在以太坊上发布个合约，研究这块已经是几个月前的事了，又忘得差不多了，机器上都有哪些环境在哪个目录都不清楚了，现在就发现以前把学习的内容都记录下来的好处了，可以翻翻以前的文章，继续理一遍这块。
复习
环境检查
geth
先看看geth还能不能用：
Chaim:~ Chaim$ geth version
Geth
Version: 1.7.3-stable
Architecture: amd64
Protocol Versions: [63 62]
Network Id: 1
Go Version: go1.9.2
Operating System: darwin
GOPATH=
GOROOT=/usr/local/Cellar/go/1.9.2/libexec
brew查看下应该是有新版本了，先把原来那套跑起来再更新吧!
Chaim:~ Chaim$ brew install geth
Error: ethereum 1.7.3 is already installed
To upgrade to 1.8.11, run `brew upgrade ethereum`
找到以前的目录，sh文件还在，执行一下，看起来这块是正常的：
Chaim:workspace Chaim$ cat ethpri.sh
#!/bin/sh
cd /Users/Chaim/Documents/workspace/ethPri
geth --rpc --datadir "./" --nodiscover console 2>>geth.log
Chaim:workspace Chaim$ ./ethpri.sh
Welcome to the Geth JavaScript console!
instance: Geth/v1.7.3-stable/darwin-amd64/go1.9.2
coinbase: 0x54b865714068f5f03574ace39a1f3279c4e83e2c
at block: 12521 (Fri, 30 Mar 2018 19:19:34 CST)
datadir: /Users/Chaim/Documents/workspace/ethPri
modules: admin:1.0 debug:1.0 eth:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0
复习下几条简单的geth命令：
> eth.accounts
["0x54b865714068f5f03574ace39a1f3279c4e83e2c", "0x469f07278600b1cb031448fd25f187f24a89ecb6", "0x068a7a0022a0e20d78682f39aa75547a0a260a2a", "0x823e1c4acbfc6527a6210e9bb9b4d5a45dc9c9a4"]
> eth.getBalance(eth.accounts[0])
3.100100377999999606784e+21
> web3.toWei(1)
"1000000000000000000"
MIST
先执行下mistsvr，也还正常：
localhost:workspace Chaim$ cat mistsvr.sh
#!/bin/sh
cd /Users/Chaim/Documents/workspace/mist/interface
meteor --no-release-check
localhost:workspace Chaim$ ./mistsvr.sh
[[[[[ ~/Documents/workspace/mist/interface ]]]]]
=> Started proxy.
=> Started MongoDB.
=> Started your app.
=> App running at: http://localhost:3000/
运行mist，不出预料的还是会出现一些不正常的情况，找不到yarn了
localhost:workspace Chaim$ cat mistcli.sh
#!/bin/sh
cd /Users/Chaim/Documents/workspace/mist
yarn dev:electron . --rpc /Users/Chaim/Documents/workspace/ethPri/geth.ipc
localhost:workspace Chaim$ ./mistcli.sh
./mistcli.sh: line 4: yarn: command not found
yarn是npm包，后来切换到nvm了，可能得在nvm下重新安装下，先试下nvm环境：
localhost:workspace Chaim$ nvm use v6
Now using node v6.14.1 (npm v3.10.10)
localhost:workspace Chaim$ node -e 'console.log("Long time no see!")'
Long time no see!
安装yarn：
localhost:workspace Chaim$ sudo npm install -g yarn
/Users/Chaim/.nvm/versions/node/v6.14.1/bin/yarnpkg -> /Users/Chaim/.nvm/versions/node/v6.14.1/lib/node_modules/yarn/bin/yarn.js
/Users/Chaim/.nvm/versions/node/v6.14.1/bin/yarn -> /Users/Chaim/.nvm/versions/node/v6.14.1/lib/node_modules/yarn/bin/yarn.js
/Users/Chaim/.nvm/versions/node/v6.14.1/lib
└── [email protected]
再次启动mist，这次能进入了：
localhost:workspace Chaim$ ./mistcli.sh
yarn run v1.9.4
$ electron -r babel-register main.js . --rpc /Users/Chaim/Documents/workspace/ethPri/geth.ipc
[2018-09-15T10:50:20.350] [INFO] Settings - Running in production mode: false
[2018-09-15T10:50:20.520] [INFO] EthereumNode - undefined null 'fast'
[2018-09-15T10:50:20.522] [INFO] EthereumNode - Defaults loaded: geth main fast
[2018-09-15T10:50:20.764] [INFO] main - Starting in Mist mode
...
日志会报一些mist版本升级、找不到geth1.8.13的错误信息，但能正常进入测试，可能正式链上发布合约还是用最新版本比较合适。
此处卡在mist加载界面，记得去geth开启挖矿：miner.start()，然后抱着电脑就像抱着个火炉了...
合约部署
直接去Mist界面中“新建合约”，把合约代码拷到“SOLIDITY合约原始代码”区。
看看把以太链上的合约拿过来编译时出现的一些错误和解决方法：
"throw" is deprecated in favour of "revert()", "require()" and "assert()".
throw;
^---^
合约代码太旧，throw需要改成require之类的。
No visibility specified. Defaulting to "public".
function TEST(
^
Spanning multiple lines.
function没指定“public”属性，明确指定是哪种类型。
Function state mutability can be restricted to pure
function safeMul(uint256 a, uint256 b) internal returns (uint256) {
^
Spanning multiple lines.
修改工具函数为“pure”，如果要修改合约存储数据则为“view”。
Expected token LParen got 'eth_compileSolidity'
function TEST public (
“public”放错地方了，应该放到函数的括号后面，而不是括号前面。
解决所有错误后就可以选择发布合约了，输入密码块确认后就发布成功！
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