PoA私鏈搭建

go-ethereum自帶puppeth工具, 可以方便地部署支援PoA的以太坊私鏈,以本地部署2節點的以太坊私有鏈為例, 部署步驟如下:

1. geth1.6版本後自帶puppeth工具(編譯geth時用 make all )
2. 建立兩個資料夾,用來儲存2個節點資料, 建立後進入到testnet資料夾

      testnet
      |-- node1
      |-- node2

1. 建立2個賬戶作為signer,生成的2個地址儲存為變數: {ADDR1} 和 {ADDR2}

      $ geth --datadir node1 account new
      $ geth --datadir node2 account new
 

1. 通過puppeth建立genesis檔案

      $ puppeth
      Please specify a network name to administer (no spaces, please)
      > testnet
      
      What would you like to do? (default = stats)
      1. Show network stats
      2. Configure new genesis
      3. Track new remote server
      4. Deploy network components
      > 2
      
      Which consensus engine to use? (default = clique)
      1. Ethash - proof-of-work
      2. Clique - proof-of-authority
      > 2
      
      How many seconds should blocks take? (default = 15)
      > 10
      
      Which accounts are allowed to seal? (mandatory at least one)
      
      (addresses from the account creation above, replace with your own)
      > 0x{ADDR1}
      > 0x{ADDR2}
      > 0x<ENTER>
      
      Which accounts should be pre-funded? (advisable at least one)
      > 0x{ADDR1}
      > 0x{ADDR2}
      > 0x<ENTER>
      
      Specify your chain/network ID if you want an explicit one (default = random)
      > <ENTER>
      
      Anything fun to embed into the genesis block? (max 32 bytes)
      > <ENTER>
      
      What would you like to do? (default = stats)
      1. Show network stats
      2. Save existing genesis
      3. Track new remote server
      4. Deploy network components
      > 2
      
      Which file to save the genesis into? (default = testnet.json)
      > <ENTER>
      
      What would you like to do? (default = stats)
      1. Show network stats
      2. Save existing genesis
      3. Track new remote server
      4. Deploy network components
      > <CTRL-C>
 

1. 啟動節點, 在2個終端上分別執行:

      serv1$ geth --datadir node1 init testnet.json
      serv1$ geth --datadir node1 --port 3000 --syncmode "full" console
      
      serv2$ geth --datadir node2 init testnet.json
      serv2$ geth --datadir node2 --port 3002 --syncmode "full" console

啟動後也可以通過attach到geth節點

      console1$ geth attach ipc:node1/geth.ipc
      console2$ geth attach ipc:node2/geth.ipc
 

1. 連線2個節點

      console2> admin.nodeInfo.enode
      {ENODE-URL}
      console1> admin.addPeer({ENODE-URL})
      
      console1> admin.nodeInfo.enode
      {ENODE-URL}
      console2> admin.addPeer({ENODE-URL})

在客戶端上 net.peerCount 應該可以看到數量是1

如果2個節點部署在2個主機上,那麼ENODE-URL中的[::]需要替換為對應主機的IP地址

1. 啟動"挖礦"

      > personal.unlockAccount(eth.coinbase)
      > eth.defaultAccount = eth.coinbase
      > miner.start()

一切順利的話,就開始定時出塊.
注意:

• 出塊時間如果配置為0, 代表沒有固定的出塊時間, 只有當有新交易產生時才觸發出塊.

作者：shi_qinfeng
連結：https://www.jianshu.com/p/82e0e1424a53
來源：簡書