基于以太坊实现局域网多节点挖矿

上一篇文章简要介绍了本地实现私有链挖矿和转账，现在这篇文章主要实现局域网下实现多个节点实现挖矿

前提，已经安装了go-ethereum，如果没有安装请移步基于以太坊创建私有链进行挖矿、交易

机器：Ubuntu(两个节点)，Mac(一个节点)

创建创世节点

创建节点json文件

$ mkdir my_eth2
$ cd my_eth2
$ vim genesis.json
{
  "config": {
        "chainId": 10,
        "homesteadBlock": 0,
        "eip155Block": 0,
        "eip158Block": 0
    },
  "coinbase"   : "0x0000000000000000000000000000000000000000",
  "difficulty" : "0x20000",
  "extraData"  : "",
  "gasLimit"   : "0x2fefd8",
  "nonce"      : "0x0000000000000042",
  "mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp"  : "0x00",
  "alloc"      : {}
}

生成节点(以下使用节点1代指)

$ geth --datadir data00 init genesis.json
WARN [01-25|17:04:25] No etherbase set and no accounts found as default
INFO [01-25|17:04:25] Allocated cache and file handles         database=/home/ubuntu/my_eth2/data00/geth/chaindata cache=16 handles=16
INFO [01-25|17:04:25] Writing custom genesis block
INFO [01-25|17:04:25] Successfully wrote genesis state         database=chaindata                                  hash=5e1fc7…d790e0
INFO [01-25|17:04:25] Allocated cache and file handles         database=/home/ubuntu/my_eth2/data00/geth/lightchaindata cache=16 handles=16
INFO [01-25|17:04:25] Writing custom genesis block
INFO [01-25|17:04:25] Successfully wrote genesis state         database=lightchaindata                                  hash=5e1fc7…d790e0

启动节点1

$ geth --datadir ./data00 --networkid 5201314 console

创建账号

> personal.newAccount("123")
"0x0b514e769e4e1990f8fb0f0f9d876d7f2b9fa5ba"

本地创建第二个节点(以下使用节点2代指)

新开窗口，创建节点2

$ geth --datadir data01 init genesis.json
WARN [01-25|17:07:33] No etherbase set and no accounts found as default
INFO [01-25|17:07:33] Allocated cache and file handles         database=/home/ubuntu/my_eth2/data01/geth/chaindata cache=16 handles=16
INFO [01-25|17:07:33] Writing custom genesis block
INFO [01-25|17:07:33] Successfully wrote genesis state         database=chaindata                                  hash=5e1fc7…d790e0
INFO [01-25|17:07:33] Allocated cache and file handles         database=/home/ubuntu/my_eth2/data01/geth/lightchaindata cache=16 handles=16
INFO [01-25|17:07:33] Writing custom genesis block
INFO [01-25|17:07:33] Successfully wrote genesis state         database=lightchaindata                                  hash=5e1fc7…d790e0

运行节点2

$ geth --datadir data01 --networkid 5201314 --ipcdisable --port 61910 --rpcport 8200 console

创建节点2的账号

 > personal.newAccount("123")
"0x3babf1eeb8d5d29acc4d1f6408529b36b4e6f880"

在Mac上创建新节点，以下使用(节点3代指)

创世节点的json文件要和Ubuntu一致

初始化节点3

$ geth --datadir data00 init genesis.json
WARN [01-25|17:14:10] No etherbase set and no accounts found as default
INFO [01-25|17:14:10] Allocated cache and file handles         database=/Users/feilong/my_chain2/data00/geth/chaindata cache=16 handles=16
INFO [01-25|17:14:10] Writing custom genesis block
INFO [01-25|17:14:10] Successfully wrote genesis state         database=chaindata                                      hash=5e1fc7…d790e0
INFO [01-25|17:14:10] Allocated cache and file handles         database=/Users/feilong/my_chain2/data00/geth/lightchaindata cache=16 handles=16
INFO [01-25|17:14:10] Writing custom genesis block
INFO [01-25|17:14:10] Successfully wrote genesis state         database=lightchaindata                                      hash=5e1fc7…d790e0

运行节点3

$ geth --datadir data00 --networkid 5201314 --ipcdisable --port 61911 --rpcport 8200 console #使用61911端口，保证networkid一致

创建账号

> personal.newAccount("123")
"0xf81b1d6c0e0835790c7e4af8a02301a67e5a0dcb"

节点1和节点2建立联系

节点2运行 > admin.nodeInfo.enode 查看node信息

> admin.nodeInfo.enode
"enode://d5bb9fecc8e997905220b5e8c0db8396880bd5326143614b33f81ead534fc4d8282cbdda620fb81eaea66c359c3acd7d590f64981099b3cc063fddae9ac376d9@192.168.164.210:61910"

节点1添加节点2

> admin.addPeer("enode://d5bb9fecc8e997905220b5e8c0db8396880bd5326143614b33f81ead534fc4d8282cbdda620fb81eaea66c359c3acd7d590f64981099b3cc063fddae9ac376d9@192.168.164.210:61910")
true

节点1和节点2运行> net

> net
{
  listening: true,
  peerCount: 1, #说明添加成功
  version: "5201314",
  getListening: function(callback),
  getPeerCount: function(callback),
  getVersion: function(callback)
}

节点1和节点3建立联系

节点3运行 > admin.nodeInfo.enode 查看node信息

>  admin.nodeInfo.enode
"enode://34dcd9b7e64b24a25fe25b6e2aab6fc10525a439b2174ad79bd55bbf867f98060f7eef26c83223ae665372afa819ffd5c9c49a039c4e5e9c4e72be35a3b65aa8@192.168.164.210:61911"

节点1添加节点3

> admin.addPeer("enode://34dcd9b7e64b24a25fe25b6e2aab6fc10525a439b2174ad79bd55bbf867f98060f7eef26c83223ae665372afa819ffd5c9c49a039c4e5e9c4e72be35a3b65aa8@192.168.164.210:61911")
true

分别查看节点1和节点3链接情况

节点1

> net
{
  listening: true,
  peerCount: 2, ##节点1连接两个节点
  version: "5201314",
  getListening: function(callback),
  getPeerCount: function(callback),
  getVersion: function(callback)
}

节点3

> net
{
  listening: true,
  peerCount: 1,
  version: "5201314",
  getListening: function(callback),
  getPeerCount: function(callback),
  getVersion: function(callback)
}

节点挖矿测试

使用任一节点挖矿，然后观察其他两个控制台，发现都会有同步的数据，说明节点2和节点3也是连接的状态（由于电脑性能原因，挖矿的时候需要等percentage到达100之后才会开始）

遇到的坑

• 要保证创世节点的json文件一致
• 保证在统一局域网内，使用Telnet命令测试
• 节点2和节点3的端口注意不要重复