以太坊環境搭建

1. Golang環境安裝；
2. go-ethereum 源碼安裝
   
   • go get -d github.com/ethereum/go-ethereum
   • go install github.com/ethereum/go-ethereum/cmd/geth
3. ubuntu 在線安裝
   
   • sudo add-apt-repository -y ppa:ethereum/ethereum
   • sudo apt-get update
   • sudo apt-get install ethereum
4. 創世區塊的初始化文件：
   
{
"nonce" : "0x0000000000000042",
"difficulty": "0x400",
"mixhash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"coinbase" : "0x0000000000000000000000000000000000000000",
"timestamp" : "0x00",
"parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"extraData" : "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
"gasLimit" : "0x80000000",
"alloc" : {},
"config" : {
"chainId": 15,
"homesteadBlock": 0,
"eip155Block": 0,
"eip158Block": 0
}
}

5. 命令:
   
   • geth --datadir "./" init genesis.json
     
     • 創建創世區塊
   • geth --datadir "./" --nodiscover console 2>>geth.log
     
     • 創建geth 私有網絡