이더리움(Ethereum) 기본

in Dev on Blockchain


Go Ethereum

Official Go implementation of the Ethereum protocol

Download: https://ethereum.github.io/go-ethereum/downloads/

sudo apt-get -y update && sudo apt-get -y upgrade
sudo apt-get install nodejs
sudo apt install aptitude
sudo aptitude install npm

https://247cryptonews.com/how-to-install-latest-ethereum-node-on-ubuntu-16-04/

sudo apt-get install software-properties-common
sudo add-apt-repository -y ppa:ethereum/ethereum 
sudo add-apt-repository -y ppa:ethereum/ethereum-dev

sudo apt-get update
sudo apt-get install ethereum

@eth-VirtualBox:~$ geth version
Geth Version: 1.8.2-stable
Git Commit: b8b9f7f4476a30a0aaf6077daade6ae77f969960
Architecture: amd64
Protocol Versions: [63 62]
Network Id: 1
Go Version: go1.9.4

Private 네트워크 구축

Geth 초기화 및 실행

genesis.json

{
  "config": {
    "chainId": 33,
    "homesteadBlock": 0,
    "eip155Block": 0,
    "eip158Block": 0
  },
  "nonce": "0x0000000000000033",
  "timestamp": "0x0",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "gasLimit": "0x8000000",
  "difficulty": "0x100",
  "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
  "coinbase": "0x3333333333333333333333333333333333333333",
  "alloc": {}
}

$ mkdir data_testnet
$ cd data_testnet/
$ vi genesis.json
$ geth --datadir /home/user01/data_testnet/ init /home/user01/data_testnet/genesis.json

이더리움 디렉토리 구조

$ sudo apt-get install tree
$ tree /home/user01/data_testnet 
.
├── genesis.json
├── geth
│   ├── chaindata
│   │   ├── 000001.log
│   │   ├── CURRENT
│   │   ├── LOCK
│   │   ├── LOG
│   │   └── MANIFEST-000000
│   └── lightchaindata
│       ├── 000001.log
│       ├── CURRENT
│       ├── LOCK
│       ├── LOG
│       └── MANIFEST-000000
└── keystore

4 directories, 11 files

Geth 실행

$ geth --identity "PrivateNetwork" --datadir "/home/user01/data_testnet/" --port "30303" --rpc --rpcaddr 0.0.0.0 --rpcport "8123" --rpccorsdomain "*" --nodiscover --networkid 1900 --rpcapi "db,eth,net,web3,miner" console 2>> /home/user01/data_testnet/geth.log

계정 생성과 조회

Welcome to the Geth JavaScript console!

instance: Geth/PrivateNetwork/v1.8.2-stable-b8b9f7f4/linux-amd64/go1.9.4
 modules: admin:1.0 debug:1.0 eth:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0

> eth
> eth.accounts
[]
> net.peerCount
0
> personal.newAccount("pass0")
"0x7a8f36c21f1b2f89a9f6c810c1289b88e559f85c"
> personal.newAccount("pass1")
"0xbd2cc6e8c322be5a43c862d39984980076930d0d"
> eth.accounts
["0x7a8f36c21f1b2f89a9f6c810c1289b88e559f85c", "0xbd2cc6e8c322be5a43c862d39984980076930d0d"]
> eth.getBalance(eth.accounts[0])
0
> eth.getBalance(eth.accounts[1])
0
> eth.getBalance(eth.coinbase)
0

채굴

> miner.start()
null
> eth.getBalance(eth.coinbase)
115000000000000000000
> web3.fromWei(eth.getBalance(eth.coinbase))
185
> miner.stop()
true
> eth.blockNumber
37

송금

> personal.unlockAccount(eth.accounts[0])
Unlock account 0x7a8f36c21f1b2f89a9f6c810c1289b88e559f85c
Passphrase: 
true
> eth.sendTransaction({from:eth.accounts[0], to:eth.accounts[1], value:web3.toWei(10,"ether")})
"0x8fbfdacc783756decfdd68ecdb4f7f35fdee5fb8b43e23983c7072bf38822ae1"
> eth.sendTransaction({from:eth.accounts[0], to:eth.accounts[1], value:web3.toWei(20,"ether")})
"0x1217431a1fc1d1b1fc1b750fcf84e46f4238044d9d629cca04dbb891c823f97d"
> eth.sendTransaction({from:eth.accounts[0], to:eth.accounts[1], value:web3.toWei(12,"ether")})
"0x1350b63b35a47f5d9f8b553fe08ba82fe6c2709c4505b5e7a063f676bcb95218"
> eth.getTransaction("0x8fbfdacc783756decfdd68ecdb4f7f35fdee5fb8b43e23983c7072bf38822ae1")
{
  blockHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
  blockNumber: null,
  from: "0x7a8f36c21f1b2f89a9f6c810c1289b88e559f85c",
  gas: 90000,
  gasPrice: 18000000000,
  hash: "0x8fbfdacc783756decfdd68ecdb4f7f35fdee5fb8b43e23983c7072bf38822ae1",
  input: "0x",
  nonce: 0,
  r: "0x91626fa3e14ca6407d2928d59059575cb2717ff0baadfb6c397962281c67e198",
  s: "0x68b26e0306a6e8ed34360cf6a650ff9ca151f9aba1139c3705cf05f1a0449e80",
  to: "0xbd2cc6e8c322be5a43c862d39984980076930d0d",
  transactionIndex: 0,
  v: "0x66",
  value: 10000000000000000000
}
# 채굴되지 않은 트랜잭션 리스트
> eth.pendingTransactions
> miner.start()
null
> eth.pendingTransactions
[]
> miner.stop()
true
> eth.pendingTransactions
[]
> eth.blockNumber
43
> eth.getBlock(43)
{
  difficulty: 131328,
  extraData: "0xd783010802846765746887676f312e392e34856c696e7578",
  gasLimit: 128695843,
  gasUsed: 0,
  hash: "0xbfb8727fb4b56163f57fa5ebfd8cc677514a6e1e731e08c67a092ee56c1df2f3",
  logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
  miner: "0x7a8f36c21f1b2f89a9f6c810c1289b88e559f85c",
  mixHash: "0x646c28605eca9abf3283f7a6e1556431652b6fcba4455a33d780c0f553a736af",
  nonce: "0x000510e55c54ad12",
  number: 43,
  parentHash: "0x53d1e0aa4a211f4e76772eb214fe1afc2be0f965fdedcef80137eafe4e051a43",
  receiptsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
  sha3Uncles: "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
  size: 536,
  stateRoot: "0x3a06000c8690c54e0fccb390958b519b7de12cf0d44c593a9919841cb10c9149",
  timestamp: 1527579249,
  totalDifficulty: 5673536,
  transactions: [],
  transactionsRoot: "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
  uncles: []
}

Peer 연결

$ sudo ifconfig enp0s8 192.168.0.207 netmask 255.255.255.0 up
[sudo] password for user01: 
$ sudo route add default gw 192.168.0.1
$ ping 192.168.0.107
$ ifconfig -a
enp0s8    Link encap:Ethernet  HWaddr 08:00:27:05:44:dc  
          inet addr:192.168.0.207  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::a00:27ff:fe05:44dc/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:710 errors:0 dropped:446 overruns:0 frame:0
          TX packets:37 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:47898 (47.8 KB)  TX bytes:2713 (2.7 KB)
          Interrupt:16 Base address:0xd240 

> admin.nodeInfo.enode
"enode://b128200b26a55a5aa2b605905b1dfa9be8426cf6d8f73c1a1c0ea89e4d4771a98feead21cc9830b772c559d42b91ee2455fad4402738571cad61f17c93b787ae@[::]:30303?discport=0"
> admin.addPeer("enode://b128200b26a55a5aa2b605905b1dfa9be8426cf6d8f73c1a1c0ea89e4d4771a98feead21cc9830b772c559d42b91ee2455fad4402738571cad61f17c93b787ae@192.168.0.202:30303?discport=0")
> net.peerCount
0
> admin.peers
[]

이더리움 클라이언트 연결

$ geth attach http://192.168.0.207:8123
Welcome to the Geth JavaScript console!

instance: Geth/PrivateNetwork/v1.8.10-stable-eae63c51/linux-amd64/go1.10
coinbase: 0x0ec6a531ce4720abdee547967ea3fdbc9c6df147
at block: 21 (Thu, 31 May 2018 10:41:00 JST)
 modules: eth:1.0 miner:1.0 net:1.0 rpc:1.0 web3:1.0

>

Unlock account

$ echo pass0 >> /home/user01/smartcontract_testnet/passwd
$ echo pass1 >> /home/user01/smartcontract_testnet/passwd
$ echo pass2 >> /home/user01/smartcontract_testnet/passwd
$ echo pass3 >> /home/user01/smartcontract_testnet/passwd

--unlock 0,1,2,3
--password /home/user01/smartcontract_testnet/passwd

pragma solidity ^0.4.18;

contract Coursetro {
    
    string fName;
    uint age;
    
    function setInstructor(string _fName, uint _age) public {
        fName = _fName;
        age = _age;
    }
    
    function getInstructor() view public returns (string, uint) {
        return (fName, age);
    }
}

참조




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