本地私有鏈嘗試以太坊挖礦功能

參考

虛擬機器環境

2C4G20G，CentOS Linux release 7.4.1708 (Core)

安裝所需基礎工具：

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

安裝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

驗證

$ go version
go version go1.10 linux/amd64

克隆編譯專案go-ethereum

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

在path中加入geth路徑

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

驗證

$ 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

配置私有鏈初始狀態，新建檔案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" 
}

初始化區塊鏈，生成創世區塊和初始狀態

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

啟動節點，進入Geth的cli介面挖礦

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

mine.start()總是null，挖不到，於是清空資料換一種方式啟動節點，進入Geth的cli介面並直接開始挖礦

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

加了兩個引數：--dev 表示自動建立一個賬戶並直接開始挖礦，--dev.period 1表示不用等有交易了才挖，如果設成0的話沒有交易挖礦就是null

檢視賬號

personal.listAccounts
[]

新建賬號，密碼123456

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

檢視cionbase

eth.coinbase
"0x7d84a2638c9b25a758026446e67c822f34247bd8"

檢視區塊數量

eth.blockNumber
19

檢視賬號餘額

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

換另一個使用者挖礦

miner.setEtherbase("0x3e5b31e581546f2900c0f3289153c788c92a2b41")

報錯

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

解鎖挖礦使用者

personal.unlockAccount(eth.coinbase)

再更換挖礦使用者挖，又報錯

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

再用誰挖都是null，暫時不試了，再繼續深入學習。