# 私链搭建

## 准备账户

进入工作目录 `/path/to/dxc/build/bin`下（本文'/path/to/dxc'指的是dxc源码的下载目录，在此之前，确保已经进行过编译，未编译参考：[编译和运行](/dxchain-wiki/zhong-wen-she-qu/kai-fa-zhe-wen-dang/kai-fa-zhe/bian-yi-he-yun-xing.md)）

```shell
$ ./geth account new --datadir ./data
```

新建账户的`keystore`文件位于 `/path/to/dxc/build/bin/data/keystore`文件夹下(过程如下)。

![](/files/vahI5J7Hbdmy4ep1qwlD)

将新地址导入metamask小狐狸钱包。

1. 首先进入导入页面

   ![](/files/Yi2gaZK0IAgWKw9GFigK)
2. 按照上图中标记顺序进行导入
   1. 选择导入方式为JSON 文件
   2. 选择新地址的keystore文件
   3. 填入创建新账户时的密码
   4. 点击导入（此处需要等待几十秒）
   5. 如果导入成功则会显示如下

      ![](/files/KHFqCDGAPwqfpPyDaeNg)

## 创建genesis.json

1. 在`/path/to/dxc/build/bin/`下创建genesis.json文件
2. 更换测试网`chainId` 为72(这里默认为72，则不需要改)。
3. 使用上面新账户（不带0x）替换 `extraData` 中的初始节点地址（注意：只替换中间40个地址字符）如下。

```
"extraData": "0x0000000000000000000000000000000000000000000000000000000000000000a88548e97af8809afac9dc7a930650c1179510590000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
===>>>
"extraData": "0x0000000000000000000000000000000000000000000000000000000000000000'your new account'0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
```

  4\. 修改`alloc`中节点地址为自己的新地址，并配置初始余额。至少`0x50c783eb9b5c85f2a80000000。`

```json
{
    "config": {
        "chainId": 72,
        "homesteadBlock": 0,
        "eip150Block": 0,
        "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
        "eip155Block": 0,
        "eip158Block": 0,
        "byzantiumBlock": 0,
        "constantinopleBlock": 0,
        "petersburgBlock": 0,
        "istanbulBlock": 0,
        "muirGlacierBlock": 0,
        "dpos": {
            "period": 3,
            "epoch": 28800
        }
    },
    "nonce": "0x0",
    "timestamp": "0x5fc58968",
    "extraData": "0x0000000000000000000000000000000000000000000000000000000000000000a88548e97af8809afac9dc7a930650c1179510590000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
    "gasLimit": "0x280de80",
    "difficulty": "0x1",
    "alloc": {
        "0xa88548e97af8809afac9dc7a930650c117951059": {
            "balance": "0x50c783eb9b5c85f2a80000000"
        }
    },
    "number": "0x0",
    "gasUsed": "0x0",
    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000"
}
```

## 初始化创世块

```bash
$ ./geth init ./genesis.json --datadir ./data
```

## 开启节点

[运行](/dxchain-wiki/zhong-wen-she-qu/kai-fa-zhe-wen-dang/kai-fa-zhe/bian-yi-he-yun-xing.md#yun-hang)

## 开启挖矿

* 打开控制台 `./geth attach --datadir ./data`
* 解锁矿工账户 `personal.unlockAccount("miner address","password",0)`
* 开启挖矿 `miner.start()`

## 多节点挖矿

1. 其余节点使用相同的`genesis.json`初始化节点。
2. 获取主节点的enode信息`admin.nodeInfo`。
3. 新节点`geth attach` 打开控制台，添加主节点信息`admin.addPeer("enode info")`。


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