本地私有链尝试以太坊挖矿功能

参考

http://blog.csdn.net/xc70203/article/details/77988473

http://blog.csdn.net/wo541075754/article/details/79260040

虚拟机环境

2C4G20G，CentOS Linux release 7.4.1708 (Core)

安装所需基础工具：

yum update -y && yum install git wget bzip2 vim gcc-c++ ntp epel-release nodejs cmake -y

安装Go

wget https://dl.google.com/go/go1.10.linux-amd64.tar.gz
tar -C /usr/local -xzf go1.10.linux-amd64.tar.gz
echo 'export GOROOT=/usr/local/go' >> /etc/profile  
echo 'export PATH=$PATH:$GOROOT/bin' >> /etc/profile  
echo 'export GOPATH=/root/go' >> /etc/profile
echo 'export PATH=$PATH:$GOPATH/bin' >> /etc/profile
source /etc/profile

验证

$ go version
go version go1.10 linux/amd64

克隆编译项目go-ethereum

git clone https://github.com/ethereum/go-ethereum.git  
cd go-ethereum  
make all

在path中加入geth路径

echo 'export PATH=$PATH:/opt/go-ethereum/build/bin' >> /etc/profile
source /etc/profile

验证

$ geth version
Geth
Version: 1.8.2-unstable
Git Commit: bd6879ac518431174a490ba42f7e6e822dcb3ee1
Architecture: amd64
Protocol Versions: [63 62]
Network Id: 1
Go Version: go1.10
Operating System: linux
GOPATH=/root/go
GOROOT=/usr/local/go

配置私有链初始状态，新建文件genesis.json

{ 
    "config": {
            "chainId": 22, 
            "homesteadBlock": 0, 
            "eip155Block": 0, 
            "eip158Block": 0 
    },
    "alloc" : {},
    "coinbase" : "0x0000000000000000000000000000000000000000", 
    "difficulty" : "0x400", 
    "extraData" : "", 
    "gasLimit" : "0x2fefd8", 
    "nonce" : "0x0000000000000038", 
    "mixhash" : "0x0000000000000000000000000000000000000000000000000000000000000000", 
    "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000", 
    "timestamp" : "0x00" 
}

初始化区块链，生成创世区块和初始状态

geth --datadir /opt/data init /opt/eth/genesis.json

启动节点，进入Geth的cli界面挖矿

geth --identity "TestNode" --rpc --rpcport "8545" --datadir /opt/data/ --port "30303" --nodiscover console

mine.start()总是null，挖不到，于是清空数据换一种方式启动节点，进入Geth的cli界面并直接开始挖矿

geth --identity "TestNode" --rpc --rpcport "8545" --datadir /opt/data/ --port "30303" --nodiscover --dev --dev.period 1 console

加了两个参数：--dev 表示自动创建一个账户并直接开始挖矿，--dev.period 1表示不用等有交易了才挖，如果设成0的话没有交易挖矿就是null

查看账号

personal.listAccounts
[]

新建账号，密码123456

personal.newAccount(“123456”)
"0x7d84a2638c9b25a758026446e67c822f34247bd8"

查看cionbase

eth.coinbase
"0x7d84a2638c9b25a758026446e67c822f34247bd8"

查看区块数量

eth.blockNumber
19

查看账号余额

myAddress = "0x7d84a2638c9b25a758026446e67c822f34247bd8"
"0x480086c9411cc3297c4aa6773a2e07c7b1efbafe"
eth.getBalance("0x7d84a2638c9b25a758026446e67c822f34247bd8")
1.15792089237316195423570985008687907853269984665640564039457584007913129639927e+77

换另一个用户挖矿

miner.setEtherbase("0x3e5b31e581546f2900c0f3289153c788c92a2b41")

报错

WARN [03-05|23:08:47] Block sealing failed err="authentication needed: password or unlock"

解锁挖矿用户

personal.unlockAccount(eth.coinbase)

再更换挖矿用户挖，又报错

WARN [03-05|23:18:48] Block sealing failed err=unauthorized

再用谁挖都是null，暂时不试了，再继续深入学习。