初始化创建¶

Clique Example¶

{
  "config": {
    "chainId": 15,
    "homesteadBlock": 0,
    "eip150Block": 0,
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "clique": {
      "period": 5,
      "epoch": 30000
    }
  },
  "difficulty": "1",
  "gasLimit": "8000000",
  "extradata": "0x00000000000000000000000000000000000000000000000000000000000000007df9a875a174b3bc565e6424a0050ebc1b2d1d820000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
  "alloc": {
    "7df9a875a174b3bc565e6424a0050ebc1b2d1d82": { "balance": "300000" },
    "f41c74c9ae680c1aa78f42e5647a62f353b7bdde": { "balance": "400000" }
  }
}

Clique: Running A Signer:

$ geth <other-flags> --unlock 0x7df9a875a174b3bc565e6424a0050ebc1b2d1d82 --mine

Ethash Example¶

{
  "config": {
    "chainId": 15,
    "homesteadBlock": 0,
    "eip150Block": 0,
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "ethash": {}
  },
  "difficulty": "1",
  "gasLimit": "8000000",
  "alloc": {
    "7df9a875a174b3bc565e6424a0050ebc1b2d1d82": { "balance": "300000" },
    "f41c74c9ae680c1aa78f42e5647a62f353b7bdde": { "balance": "400000" }
  }
}

Ethash: Running A Miner:

$ geth <other-flags> --mine --minerthreads=1 --etherbase=0x0000000000000000000000000000000000000000

初始化创建步骤¶

新增配置文件:genesis.json:

{
  "config": {   // 定义个人链的设置
        "chainId": 0,         // 你个人链的唯一标识
        "homesteadBlock": 0,  // 定义ethereum平台的version和protocol
        "eip155Block": 0,     // 用于支持non-backward-compatible协议的改变
        "eip158Block": 0      //
    },
  "alloc"      : {},
  "coinbase"   : "0x0000000000000000000000000000000000000000",
  "difficulty" : "0x2000",    // 挖矿难度
  "extraData"  : "",
  "gasLimit"   : "0x2fefd8",  // 燃料限制，越大限制越少
  "nonce"      : "0x0000000000000042",
  "mixhash"    : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
  "timestamp"  : "0x00"
}
// 注:
// 1. 不想让别人连接你的话，修改nonce的值
// 2. 可以修改alloc的值来预先给帐户钱
"alloc": {
  "0x0000000000000000000000000000000000000001": {"balance": "111111111"},
  "0x0000000000000000000000000000000000000002": {"balance": "222222222"}
}

Initializing the Geth Database:

$ geth  --datadir "/data/chain" init genesis.json

初始创建后，就可用以下命令启动:

$ geth --datadir "/data/chain" --networkid 15 console

启动后可以用以下命令连接:

$ geth attach /data/chain/geth.ipc

Scheduling Hard Forks(安排硬分叉)¶

说明:

升级以太坊时用到

指定硬分叉的Block:

// assume your network is running and its current block number is 35421
{
  "config": {
    ...
    "istanbulBlock": 40000,
    ...
  },
  ...
}

关闭所有结点并执行:

$ geth init --datadir data genesis.json