1 安装 go-ethereum

参考网址：https://github.com/ethereum/go-ethereum/wiki/Installation-Instructions-for-Mac

brew tap ethereum/ethereum

brew install ethereum

安装solc(solidity语言编译器) 和solc-cli

sudo npm install -g solc solc-cli --save-dev

测试是否安装成功：

geth --help

下载源码并编译

git clone https://github.com/ethereum/go-ethereum

brew install go

cd go-ethereum

make geth 

make geth

/Users/lemon/go-ethereum/build/bin/geth

launch geth

2 搭建私有链

1，创建创世文件genesis.json

`{"config": {"chainId":0,"homesteadBlock":0,"eip155Block":0,"eip158Block":0},"alloc": {},"coinbase":"0x0000000000000000000000000000000000000000","difficulty":"0x20000","extraData":"","gasLimit":"0x2fefd8","nonce":"0x0000000000000042","mixhash":"0x0000000000000000000000000000000000000000000000000000000000000000","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000","timestamp":"0x00"}`

{"config": {"chainId":666,"homesteadBlock":0,"eip155Block":0,"eip158Block":0},"alloc": {},"coinbase":"0x0000000000000000000000000000000000000000","difficulty":"0x20000","extraData":"","gasLimit":"0x2fefd8","nonce":"0x0000000000000042","mixhash":"0x0000000000000000000000000000000000000000000000000000000000000000","parentHash":"0x0000000000000000000000000000000000000000000000000000000000000000","timestamp":"0x00"}

表头|表头|表头---|:--:|---:内容|内容|内容内容|内容|内容

2,启动私有链

geth  --datadir "./" --port "30303" --rpc  --rpcaddr "0.0.0.0"  --rpccorsdomain "*"  --rpcapi "db,eth,net,web3" console 2>>geth.log

3.打印日志

geth --datadir "./" --nodiscover --port "30303" console 2>>geth.log

tail -f geth.log  //这句命令可以持续的输出以太坊的日志

3 部署合约

1，编写合约，咱们来个最简单的合约

pragma solidity ^0.4.0;

contract Sample {

    uint public value;

          function Sample(uint v){

                    value=v;

          }

          function set(uint v){

                    value=v;

          }

          function get() constant returns (uint){

                    return value;

          }

}

2，编译合约（https://ethereum.github.io/browser-solidity/）在线编译

在线编译

（1），先配置环境，选择连接我们自己搭建的私链

（2）然后点击create

（3）在点击一个at address  如果出现下方 说明编译成功

（4）查看编译的结果

编译的结果

3，使用命令行将合约部署到私链上

（1）abi=[{"constant": true, "inputs": [],"name": "value","outputs": [ { "name": "", "type": "uint256" } ],"payable": false, "stateMutability": "view", "type": "function"}, {"constant": true,"inputs": [],"name": "get","outputs": [{"name": "","type": "uint256"}],"payable":false,"stateMutability": "view","type": "function"},{"constant": false,"inputs": [{"name": "v","type": "uint256"}],"name": "set","outputs": [],"payable": false,"stateMutability": "nonpayable","type": "function"},{"inputs": [{"name": "v","type": "uint256"}],"payable": false,"stateMutability": "nonpayable","type": "constructor"}]

（2）sample=eth.contract(abi)

（3）SampleHE = “xxxxxxx”（数据在scenario.json里面的 "bytecode": "608060405234801561001057600xxxxxx",）字段

（4）thesample=sample.new(1,{from:eth.accounts[0],data:SampleHEX,gas:3000000})

切记执行完了记得把挖矿开一会 不然合约不生效

然后这时候合约已经部署成功就要执行掉方法了

thesample.get()

1

thesample.set.sendTransaction(9, {from:eth.accounts[0], gas:3000000})

thesample.get()

9

到此结束～～～