Clip-Ding Academy Blockchain 2.0 technology Ethereum private chain building and Geth client use

In 2018, it was believed that most of the blockchain development technologies were divided into three architectures: 1.0, 2.0, 3.0, and today we are talking about Blockchain 2.0 technology Ethereum private chain building and Geth client use.

Installation of the Geth client

Installing using the installation package

Sudoapt-getinstallsoftware-properties-common

Sudoadd-apt-repository-yppa:ethereum/ethereum

Sudoapt-getupdate

Sudoapt-getinstallethereum

Use source code compile, build Golang environment

1. Download the Go Language installation package First wget

2. Perform sudotar-c/usr/local/-xzfgo1.8.3.linux-amd64.tar.gz decompression

3.VIM~/.BASHRC add exportpath= $PATH:/usr/local/go/bin then build the workspace directory under the/home directory and add the Go working directory exportgopath=/home/ Workspace, last SOURCE~/.BASHRC.

4.sudoapt-getinstallgit-y install git into workspace, build github.com directory, github.com directory to build Ethereum directory, execute ethereum in Gitclonehttps directory ://github.com/ethereum/go-ethereum.git

5.cdgo-ethereum Execution Makegeth

Create a private chain

Create an initial block

Vimgenesis.json

{

"Nonce": "0x0000000000000042",

"Config": {

"Chainid": 1123,

"Homesteadblock": 0,

"Eip155block": 0,

"Eip158block": 0

},

"Timestamp": "0x0",

"Parenthash": "0x0000000000000000000000000000000000000000000000000000000000000000",

"Extradata": "0x00",

"Gaslimit": "0x80000000",

"Difficulty": "0x10",

"Mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",

"Coinbase": "0x3333333333333333333333333333333333333333",

"Alloc": {}

}

Initializing the Genesis block

Geth--datadir "Qkl"--networkid1123initgenesis.json

Enter the private chain

Geth--identity "Qkl"--datadir "Qkl"--networkid1123--rpc--port30303console2>>geth.log

Geth Some commands for the client

Account Operations

eth.accounts//View Account

personal.listaccounts//View Account

Personal.newaccount ("* * *")//New Account

Personal.unlockaccount ("**********")//Unlock Account

Personal.lockaccount ("**********")//Lock Account

Token operation

Eth.getbalance ()//view balance

Web3.fromwei ()//Unit conversion

Node operations

NET Module

net.listening//View node Status

net.peercount//View the number of node links

Admin Module

admin.nodeinfo//Viewing node information

Admin.addpeer ()//Add node

admin.peers//View information for the added node

ETH module

eth.hashrate//Viewing the hash operation rate of a node

Open and close mining

Miner.start (n)//n is the number of mining threads

Miner.stop ()

Some setup commands

Miner.setetherbase (Eth.accounts[n])//etherbase address does not need to be on this machine

Miner.setextra ("Zhou")//write some additional information

Eth.getblock (n)//view chunk information