初学以太坊--环境搭建篇

Geth命令安装（windows版本）

由于在windows下编译安装geth需要go语言等一系列步骤，初学者比较有点懵，以下介绍一个最简单的方法
1、下载资源

官网：
https://geth.ethereum.org/downloads/
csdn资源：
https://download.csdn.net/download/sail331x/12549862

2、解压（如我这里是解压到 C:\geth\1.9.15 中，文件夹重命名过，所有exe文件都在这个目录下）

3、加入到环境变量PATH中（不会的就直接自己百度，把上面的目录放到Path下即可）

4、打开cmd，然后输入

geth version

5、就可以看到对应的版本信息

Geth
Version: 1.9.15-stable
Git Commit: 0f77f34bb67b640bd8af22b215f3d279a1e21170
Git Commit Date: 20200608
Architecture: amd64
Protocol Versions: [65 64 63]
Go Version: go1.14.2
Operating System: windows
GOPATH=
GOROOT=C:\go

centos安装geth

1、安装go语言

#下载go安装包
wget https://studygolang.com/dl/golang/go1.13.4.linux-amd64.tar.gz#解压
tar -zxf go1.13.4.linux-amd64.tar.gz
#假如当前目录为 /opt
#解压后会有个/opt/go的文件夹，然后放到path中
echo PATH=$PATH:/opt/go/bin >> /etc/profile
source /etc/profile
#查看go版本
go version
##成功看到版本即可

2、安装gcc

yum install -y gcc
##安装完就可以

3、编译安装geth

#如果不能翻墙，就把下面的放到/etc/profile中，然后再source一下
echo GOPROXY=https://goproxy.io >> /ect/profile
source /etc/profile#下载
git clone https://github.com/ethereum/go-ethereum.git
##如果觉得慢  可以到我的资源中获取~
链接： https://download.csdn.net/download/sail331x/12558326cd go-ethereum#编译
make all
##正常的话 一直没error##编译成功后
mv ./build/bin /usr/local/eth
##然后把  /usr/local/eth 放到/etc/profile的path中~ 然后直接source一下 这里就不做过多的说明了##查看geth版本
geth version
##正常输出即可

私有链搭建

命令
1、初始化创世块

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

genesis.json内容：{"config": {"chainId": 512,"homesteadBlock": 0,"eip150Block": 0,"eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000","eip155Block": 0,"eip158Block": 0,"byzantiumBlock": 0,"constantinopleBlock": 0,"petersburgBlock": 0,"istanbulBlock": 0,"ethash": {}},"nonce": "0x0","timestamp": "0x5ddf8f3e","extraData": "0x0000000000000000000000000000000000000000000000000000000000000000","gasLimit": "0x47b760","difficulty": "0x00020","mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000","coinbase": "0x0000000000000000000000000000000000000000","alloc": { },"number": "0x0","gasUsed": "0x0","parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
}

2、启动私有网络

geth --rpcapi eth,web3,admin,personal,net,miner --allow-insecure-unlock --identity "privatepeer" --networkid 10086  --datadir /eth/datadir --cache 4096 --rpc --rpcport 6666 --rpcaddr 0.0.0.0  --ws --wsaddr 0.0.0.0 --wsport 6667 --wsorigins "*"

3、创建账号并挖矿

#geth连接网络
geth attach http://127.0.0.1:6666#123456是密码 解锁账号的时候就会有
personal.newAccount("123456")
#挖矿
miner.start()#查看挖了多少wei的eth
web3.fromWei(eth.getBalance(eth.coinbase))#停止
miner.stop()

主网数据同步

如果主网数据同步不成功，区块高度没有变化，可以在对应的datadir下添加一个 static-nodes.json文件，
下载地址：

https://upyun-assets.ethfans.org/uploads/doc/file/b0c5266be42f43f1baf7207c432bede6.json?_upd=static-nodes.json

之前下载的一个 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