以太坊原始碼分析(9)CMD實際操作分析

尹成發表於2018-05-21

### cmd包分析
#### cmd下面總共有13個子包，除了util包之外，每個子包都有一個主函式,每個主函式的init方法中都定義了該主函式支援的命令，如

##### geth包下面的：

```
func init() {
    // Initialize the CLI app and start Geth
    app.Action = geth
    app.HideVersion = true // we have a command to print the version
    app.Copyright = "Copyright 2013-2017 The go-ethereum Authors"
    app.Commands = []cli.Command{
        // See chaincmd.go:
        initCommand,
        importCommand,
        exportCommand,
        copydbCommand,
        removedbCommand,
        dumpCommand,
        // See monitorcmd.go:
        monitorCommand,
        // See accountcmd.go:
        accountCommand,
        walletCommand,
        // See consolecmd.go:
        consoleCommand,
        attachCommand,
        javascriptCommand,
        // See misccmd.go:
        makecacheCommand,
        makedagCommand,
        versionCommand,
        bugCommand,
        licenseCommand,
        // See config.go
        dumpConfigCommand,
    }
    sort.Sort(cli.CommandsByName(app.Commands))
}
```


###### 再單獨分析initCommand:

```
initCommand = cli.Command{
      Action:    utils.MigrateFlags(initGenesis),
      Name:      "init",
      Usage:     "Bootstrap and initialize a new genesis block",
      ArgsUsage: "<genesisPath>",
      Flags: []cli.Flag{
         utils.DataDirFlag,
         utils.LightModeFlag,
      },
      Category: "BLOCKCHAIN COMMANDS",
      Description: `
The init command initializes a new genesis block and definition for the network.
This is a destructive action and changes the network in which you will be
participating.

```

###### 其中Name是對應命令的指令，action是呼叫該指令去完成的動作，usage表示用途,arguUsage顯示該命令後面跟的引數個數以及每個引數的意義,
###### 該init方法其實就是去初始化創世塊,flags代表的是這個子命令額外可以執行的命令,如改init命令可以攜帶兩個引數，點進去utils.DataDirFlag可以看到：

```
// General settings
DataDirFlag = DirectoryFlag{
   Name:  "datadir",
   Usage: "Data directory for the databases and keystore",
   Value: DirectoryString{node.DefaultDataDir()},
}
```


* __可以用 --datadir [dir]來指定資料庫的路徑，如果沒有指定由於該引數有value所以會啟用預設的路徑，也是home目錄下面的.ethereum.__

*  __/cmd/wnode/main.go　通過連線其他節點啟動__


*  __/cmd/geth /cmd/swarm　都是定義了很多命令__





### eth下cmd的rlpdump子包,該包的主要作用從給定檔案中轉儲RLP資料以可讀的形式．如果檔名被省略，資料將從stdin中讀取

　 /rlpdump

##### 解碼rlp的資料


###### rlpdump的command的help

```
Usage: /tmp/___cmd_rlpdump_test [-noascii] [-hex <data>] [filename]
  -hex string
      dump given hex data
  -noascii
      don't print ASCII strings readably
  -single
      print only the first element, discard the rest

Dumps RLP data from the given file in readable form.
If the filename is omitted, data is read from stdin.

```


###### example1:
```
  demo command: --hex f872f870845609a1ba64c0b8660480136e573eb81ac4a664f8f76e4887ba927f791a053ec5ff580b1037a8633320ca70f8ec0cdea59167acaa1debc07bc0a0b3a5b41bdf0cb4346c18ddbbd2cf222f54fed795dde94417d2e57f85a580d87238efc75394ca4a92cfe6eb9debcc3583c26fee8580
  success_result_demo:
    [
      [
        5609a1ba,
        "d",
        [],
        0480136e573eb81ac4a664f8f76e4887ba927f791a053ec5ff580b1037a8633320ca70f8ec0cdea59167acaa1debc07bc0a0b3a5b41bdf0cb4346c18ddbbd2cf222f54fed795dde94417d2e57f85a580d87238efc75394ca4a92cfe6eb9debcc3583c26fee85,
        "",
      ],
    ]
```

###### example2:

```
  demo command: --noascii --hex CE0183FFFFFFC4C304050583616263
  success_result_demo:
    [
      01,
      ffffff,
      [
        [
          04,
          05,
          05,
        ],
      ],
      616263,
    ]



```
### cmd包下的p2psim子包的分析, p2psim is a command line client for the HTTP API

##### 首先我們啟動對應的main函式,對應的啟動引數是`--help`,來檢視該包下所有命令的使用,結果如下:

```
NAME:
   ___go_build_main_go__1_ - devp2p simulation command-line client

USAGE:
   ___go_build_main_go__1_ [global options] command [command options] [arguments...]

VERSION:
   0.0.0

COMMANDS:
     show      show network information
     events    stream network events
     snapshot  create a network snapshot to stdout
     load      load a network snapshot from stdin
     node      manage simulation nodes
     help, h   Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --api value    simulation API URL (default: "http://localhost:8888") [$P2PSIM_API_URL]
   --help, -h     show help
   --version, -v  print the version
```

##### 該子包提供如何下的命令:
```
p2psim show
p2psim events [--current] [--filter=FILTER]
p2psim snapshot
p2psim load
p2psim node create [--name=NAME] [--services=SERVICES] [--key=KEY]
p2psim node list
p2psim node show <node>
p2psim node start <node>
p2psim node stop <node>
p2psim node connect <node> <peer>
p2psim node disconnect <node> <peer>
p2psim node rpc <node> <method> [<args>] [--subscribe]

```

##### 要正常使用該子包下的命令，我們需要執行`/p2p/simulations/examples/ping-pong.go`的主函式來啟動一個包含執行簡單的節點的模擬網路.
正常啟動後,你將看到:
```
INFO [01-23|11:17:10] using sim adapter
INFO [01-23|11:17:10] starting simulation server on 0.0.0.0:8888...

```

##### 該服務啟動後,提供如下的API,其作用等同於上面的命令,命令呼叫的實現其實就是呼叫API,訪問的路徑字首就是`0.0.0.0:8888`:
```
GET    /                            Get network information
POST   /start                       Start all nodes in the network
POST   /stop                        Stop all nodes in the network
GET    /events                      Stream network events
GET    /snapshot                    Take a network snapshot
POST   /snapshot                    Load a network snapshot
POST   /nodes                       Create a node
GET    /nodes                       Get all nodes in the network
GET    /nodes/:nodeid               Get node information
POST   /nodes/:nodeid/start         Start a node
POST   /nodes/:nodeid/stop          Stop a node
POST   /nodes/:nodeid/conn/:peerid  Connect two nodes
DELETE /nodes/:nodeid/conn/:peerid  Disconnect two nodes
GET    /nodes/:nodeid/rpc           Make RPC requests to a node via WebSocket

```

##### 此處不深究API,模擬網路的服務已經起來了,下面開始p2psim包下命令的使用:

__/p2psim__

 * show
 ```
   function:顯示當前模擬網路的狀態
   args:""
   demo: show
   notice:
   success_result_demo:
     NODES  0
     CONNS  0

 ```

 * snapshot
  ```
    function:匯出當前模擬網路的節點資訊
    args:""
    demo: shapshot
    notice:
    success_result_demo:
      {"nodes":[{"node":{"config":{"id":"085416957c3a0afef6aabe6c0d6b27b7cf8a61f28a3a5439010fcc9e49945a1818ea38946dda8c82004b231ab771450ee0d87886163b65eaa48ecfbcb85e871d","private_key":"3480d230f453e7c207bbd3b770bf774dc8a17e599394f9283147a35c3ead561c","name":"node1","services":["ping-pong"]},"up":true}},{"node":{"config":{"id":"cedbaecccfe42d04b742d1be6e924e0654a7eb1aa584d497f98d24951b156ada84bcfc6455ff37ba1fc81179d0a7c3da1ba34945be19d1fe5cd4c8a32a659a7b","private_key":"b7592cdeee6195c4486fcdd8007e1aedfd3a49e6c9f53e0845bf977d4ad043cc","name":"node2","services":["ping-pong"]},"up":false}}],"conns":[{"one":"cedbaecccfe42d04b742d1be6e924e0654a7eb1aa584d497f98d24951b156ada84bcfc6455ff37ba1fc81179d0a7c3da1ba34945be19d1fe5cd4c8a32a659a7b","other":"085416957c3a0afef6aabe6c0d6b27b7cf8a61f28a3a5439010fcc9e49945a1818ea38946dda8c82004b231ab771450ee0d87886163b65eaa48ecfbcb85e871d","up":false}]}


  ```

 * node
  > * create
  ```
     function:建立一個節點
     args:[--name=NAME] [--services=SERVICES] [--key=KEY]
     demo: node create --name node1
     notice:
     success_result_demo:
       Created node1
  ```
  > * list
  ```
     function:列出當前模擬網路的節點資訊
     args:""
     demo: node list
     notice:
     success_result_demo:
       NAME   PROTOCOLS  ID
       node1             085416957c3a0afef6aabe6c0d6b27b7cf8a61f28a3a5439010fcc9e49945a1818ea38946dda8c82004b231ab771450ee0d87886163b65eaa48ecfbcb85e871d
       node2             cedbaecccfe42d04b742d1be6e924e0654a7eb1aa584d497f98d24951b156ada84bcfc6455ff37ba1fc81179d0a7c3da1ba34945be19d1fe5cd4c8a32a659a7b

  ```
  > * show
  ```
    function:檢視模擬網路中某個節點的具體資訊
    args:<node>
    demo: node show node1
    notice:
    success_result_demo:
      NAME       node1
      PROTOCOLS
      ID         085416957c3a0afef6aabe6c0d6b27b7cf8a61f28a3a5439010fcc9e49945a1818ea38946dda8c82004b231ab771450ee0d87886163b65eaa48ecfbcb85e871d
      ENODE      enode://085416957c3a0afef6aabe6c0d6b27b7cf8a61f28a3a5439010fcc9e49945a1818ea38946dda8c82004b231ab771450ee0d87886163b65eaa48ecfbcb85e871d@127.0.0.1:30303
  ```
  > * start
  ```
     function:啟動一個節點
     args:<node>
     demo: node start node1
     notice:
     success_result_demo:
       Started node1
  ```
  > * connect
  ```
     function:將一個節點連線到另外一個節點
     args:<node> <peer>
     demo: node connect node2 node1
     notice:
     success_result_demo:
       Connected node2 to node1

  ```
  > * disconnect

    ```
       function:節點斷開連線
       args:<node> <peer>
       demo: node disconnect node2 node1
       notice:
       success_result_demo:
         Disconnected node2 from node1

    ```
  > * stop

     ```
       function:停止一個節點
       args:<node>
       demo: node stop node2
       notice:
       success_result_demo:
         Stopped node2

     ```
   > * rpc

      ```
         function:呼叫rpc介面
         args:<node> <method> [<args>] [--subscribe]
         demo: node rpc node1 admin
         notice:
         success_result_demo:
          　// TODO

       ```
### cmd包下的geth子包主函式啟動的各個子命令解析

#### /geth

* __init__
```
  function:匯入創世塊的json,以指定的json作為創世塊
  args:<genesisPath>
  demo: init /home/yujian/eth-go/genesis.json
  notice:ethereum預設建立路徑為home目錄的.ethereum,如果該目錄下已經寫入過創世快，會執行失敗
  success_result_demo:
    WARN [01-16|10:25:12] No etherbase set and no accounts found as default
    INFO [01-16|10:25:12] Allocated cache and file handles         database=/home/yujian/.ethereum/geth/chaindata cache=16 handles=16
    INFO [01-16|10:25:12] Writing custom genesis block
    INFO [01-16|10:25:12] Successfully wrote genesis state         database=chaindata                             hash=bf2891…ad1419
    INFO [01-16|10:25:12] Allocated cache and file handles         database=/home/yujian/.ethereum/geth/lightchaindata cache=16 handles=16
    INFO [01-16|10:25:12] Writing custom genesis block
    INFO [01-16|10:25:12] Successfully wrote genesis state         database=lightchaindata                             hash=bf2891…ad1419
```

* __import__
```
  function:匯入區塊資料到當前執行的鏈中
  args:<filename> (<filename 2> ... <filename N>)
  demo: import /home/yujian/eth-block.txt
  notice:如果匯入的檔案只要一個是錯誤的，那麼會失敗，如果有多個檔案錯誤，那麼程式會繼續執行忽略錯誤的．
  success_result_demo:
    WARN [01-16|11:00:32] No etherbase set and no accounts found as default
    INFO [01-16|11:00:32] Allocated cache and file handles         database=/home/yujian/.ethereum/geth/chaindata cache=128 handles=1024
    Import done in 306.866µs.

    INFO [01-16|11:00:32] Disk storage enabled for ethash caches   dir=/home/yujian/.ethereum/geth/ethash count=3
    Compactions
    INFO [01-16|11:00:32] Disk storage enabled for ethash DAGs     dir=/home/yujian/.ethash               count=2
     Level |   Tables   |    Size(MB)   |    Time(sec)  |    Read(MB)   |   Write(MB)
    -------+------------+---------------+---------------+---------------+---------------
    INFO [01-16|11:00:32] Loaded most recent local header          number=0 hash=bf2891…ad1419 td=33554432
       0   |          3 |       0.00094 |       0.00000 |       0.00000 |       0.00000
    INFO [01-16|11:00:32] Loaded most recent local full block      number=0 hash=bf2891…ad1419 td=33554432

    Trie cache misses:  0
    INFO [01-16|11:00:32] Loaded most recent local fast block      number=0 hash=bf2891…ad1419 td=33554432
    Trie cache unloads: 0

    INFO [01-16|11:00:32] Importing blockchain                     file=/home/yujian/eth-block.txt
    Object memory: 34.677 MB current, 34.670 MB peak
    System memory: 74.100 MB current, 73.850 MB peak
    Allocations:   0.015 million
    GC pause:      10.454997ms

    Compacting entire database...
    INFO [01-16|11:00:33] Database closed                          database=/home/yujian/.ethereum/geth/chaindata
    Compaction done in 64.422235ms.

    Compactions
     Level |   Tables   |    Size(MB)   |    Time(sec)  |    Read(MB)   |   Write(MB)
    -------+------------+---------------+---------------+---------------+---------------
       0   |          0 |       0.00000 |       0.00451 |       0.00000 |       0.00021
       1   |          1 |       0.00053 |       0.00435 |       0.00114 |       0.00053
```

* __export__
```
  function:匯出區塊資料到指定的檔案
  args:<filename> [<blockNumFirst> <blockNumLast>]
  demo: export /home/yujian/eth-block.txt
  notice:
  success_result_demo:
    WARN [01-16|10:51:36] No etherbase set and no accounts found as default
    INFO [01-16|10:51:36] Allocated cache and file handles         database=/home/yujian/.ethereum/geth/chaindata cache=128 handles=1024
    INFO [01-16|10:51:36] Disk storage enabled for ethash caches   dir=/home/yujian/.ethereum/geth/ethash count=3
    INFO [01-16|10:51:36] Disk storage enabled for ethash DAGs     dir=/home/yujian/.ethash               count=2
    Export done in 628.951µsINFO [01-16|10:51:36] Loaded most recent local header          number=0 hash=bf2891…ad1419 td=33554432
    INFO [01-16|10:51:36] Loaded most recent local full block      number=0 hash=bf2891…ad1419 td=33554432
    INFO [01-16|10:51:36] Loaded most recent local fast block      number=0 hash=bf2891…ad1419 td=33554432
    INFO [01-16|10:51:36] Exporting blockchain                     file=/home/yujian/eth-block.txt
    INFO [01-16|10:51:36] Exporting batch of blocks                count=1
    INFO [01-16|10:51:36] Exported blockchain                      file=/home/yujian/eth-block.txt
```


* __copydb__
```
  function:從存在的鏈資料資料夾中建立一條本地鏈
  args:<sourceChaindataDir>
  demo: copydb /home/yujian/eth-block.txt
  notice:
  success_result_demo:
    WARN [01-16|11:35:55] No etherbase set and no accounts found as default
    INFO [01-16|11:35:55] Allocated cache and file handles         database=/home/yujian/.ethereum/geth/chaindata cache=128 handles=1024
    INFO [01-16|11:35:55] Disk storage enabled for ethash caches   dir=/home/yujian/.ethereum/geth/ethash count=3
    INFO [01-16|11:35:55] Disk storage enabled for ethash DAGs     dir=/home/yujian/.ethash               count=2
    INFO [01-16|11:35:55] Loaded most recent local header          number=0 hash=bf2891…ad1419 td=33554432
    INFO [01-16|11:35:55] Loaded most recent local full block      number=0 hash=bf2891…ad1419 td=33554432
    INFO [01-16|11:35:55] Loaded most recent local fast block      number=0 hash=bf2891…ad1419 td=33554432
    INFO [01-16|11:35:55] Allocated cache and file handles         database=/home/yujian/eth-go/geth/chaindata    cache=128 handles=256
    INFO [01-16|11:35:55] Block synchronisation started
    INFO [01-16|11:35:55] Imported new state entries               count=1 elapsed=33.277µs processed=1 pending=0 retry=0 duplicate=0 unexpected=0
    INFO [01-16|11:35:56] Imported new block headers               count=11 elapsed=1.276s   number=11 hash=ec3374…59a2ba ignored=0
    Database copy done in 1.280940454s
    Compacting entire database...
    INFO [01-16|11:35:56] Imported new chain segment               blocks=11 txs=0 mgas=0.000 elapsed=1.961ms  mgasps=0.000 number=11 hash=ec3374…59a2ba
    Compaction done in 11.130389ms.
```

* __removedb__
```
   function:移除當前鏈的資料庫
   args:""
   demo: removedb
   notice:預設當前鏈的資料在home目錄下的.ethereum目錄下
   success_result_demo:
     WARN [01-16|11:48:09] No etherbase set and no accounts found as default
     /home/yujian/.ethereum/geth/chaindata
     Remove this database? [y/N] y
     /home/yujian/.ethereum/geth/lightchaindata
     INFO [01-16|11:48:19] Database successfully deleted            database=chaindata elapsed=7.832ms
     Remove this database? [y/N] y
     INFO [01-16|11:48:27] Database successfully deleted            database=lightchaindata elapsed=481.229µs
```


* __dump__
```
   function:轉存指定的塊
   args:[<blockHash> | <blockNum>]...
   demo: dump 0
   notice:
   success_result_demo:
     "storage": {}
             },
             "af3cb5965933e7dad883693b9c3e15beb68a4873": {
                 "balance": "2000000000000000000000",
                 "nonce": 0,
                 "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
                 "codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
                 "code": "",
                 "storage": {}
             },
             "af4493e8521ca89d95f5267c1ab63f9f45411e1b": {
                 "balance": "200000000000000000000",
                 "nonce": 0,
                 "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
                 "codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
                 "code": "",
                 "storage": {}
             },
           }
         }
         INFO [01-16|14:02:06] Database closed                          database=/home/yujian/.ethereum/geth/chaindata
```


* __monitor__
```
    function:監視和視覺化節點指標
    args:""
    demo: monitor
    notice:該命令本地未調通,需要先啟鏈，才能呼叫該命令去看監控的狀態
    success_result_demo:
    // TODO



```


* __account__
```
    function:管理賬戶
    args:"[new|list|update|import]"
    demo: account new
    notice:“帳戶匯入”選項只能用於匯入通用金鑰檔案
    success_result_demo:
      WARN [01-16|14:44:44] No etherbase set and no accounts found as default
      Your new account is locked with a password. Please give a password. Do not forget this password.
      !! Unsupported terminal, password will be echoed.
      Passphrase: 123456

      Repeat passphrase: 123456

      Address: {2a23e9223d7af9c56f5abd0c8226021b51c98cbc}

      Process finished with exit code 0
```


* __wallet__
```
    function:匯入預付款錢包(一般用不到，用的是account功能)
    args:""
    demo: wallet import
    notice:"錢包匯入"選項只能用於匯入預售錢包
    success_result_demo:

```
　　


* __console__
```
    function:開啟一條私有鏈,並開啟一個視覺化的js錢包控制檯
    args:""
    demo: console
    notice:
    success_result_demo:
      INFO [01-16|15:26:13] Starting peer-to-peer node               instance=Geth/v1.7.3-unstable/linux-amd64/go1.9.2
      INFO [01-16|15:26:13] Allocated cache and file handles         database=/home/yujian/.ethereum/geth/chaindata cache=128 handles=1024
      INFO [01-16|15:26:14] Initialised chain configuration          config="{ChainID: 1 Homestead: 1150000 DAO: 1920000 DAOSupport: true EIP150: 2463000 EIP155: 2675000 EIP158: 2675000 Byzantium: 4370000 Engine: ethash}"
      INFO [01-16|15:26:14] Disk storage enabled for ethash caches   dir=/home/yujian/.ethereum/geth/ethash count=3
      INFO [01-16|15:26:14] Disk storage enabled for ethash DAGs     dir=/home/yujian/.ethash               count=2
      INFO [01-16|15:26:14] Initialising Ethereum protocol           versions="[63 62]" network=1
      INFO [01-16|15:26:14] Loaded most recent local header          number=1127484 hash=ae7ee2…52ae4c td=8985161313979839462
      INFO [01-16|15:26:14] Loaded most recent local full block      number=0       hash=d4e567…cb8fa3 td=17179869184
      INFO [01-16|15:26:14] Loaded most recent local fast block      number=1092806 hash=6e839a…2eb127 td=8395031237882431385
      INFO [01-16|15:26:14] Upgrading chain index                    type=bloombits percentage=80
      INFO [01-16|15:26:14] Loaded local transaction journal         transactions=0 dropped=0
      INFO [01-16|15:26:14] Regenerated local transaction journal    transactions=0 accounts=0
      INFO [01-16|15:26:14] Starting P2P networking
      INFO [01-16|15:26:16] UDP listener up                          self=enode://bef014afb2b63c749d1e3917a25dc9e508cb67e6010965f11695beef50c29f40a5949fc2082487fadb262c30ff2fb626ce86d4a7cf994d025f5dfee7231051e6@[::]:30303
      INFO [01-16|15:26:16] RLPx listener up                         self=enode://bef014afb2b63c749d1e3917a25dc9e508cb67e6010965f11695beef50c29f40a5949fc2082487fadb262c30ff2fb626ce86d4a7cf994d025f5dfee7231051e6@[::]:30303
      INFO [01-16|15:26:16] IPC endpoint opened: /home/yujian/.ethereum/geth.ipc
      Welcome to the Geth JavaScript console!

      instance: Geth/v1.7.3-unstable/linux-amd64/go1.9.2
      coinbase: 0x2a23e9223d7af9c56f5abd0c8226021b51c98cbc
      at block: 0 (Thu, 01 Jan 1970 08:00:00 CST)
       datadir: /home/yujian/.ethereum
       modules: admin:1.0 debug:1.0 eth:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0
```



* __attach__
```
    function:開啟一個視覺化的js錢包控制檯(連線到一個指定的鏈)
    args:
           --jspath loadScript          JavaScript root path for loadScript (default: ".")
           --exec value                 Execute JavaScript statement
           --preload value              Comma separated list of JavaScript files to preload into the console
           --datadir "/root/.ethereum"  Data directory for the databases and keystore
    demo:attach --datadir="/home/yujian/.ethereum/geth.ipc"
    notice:必須啟動一條本地鏈，這樣才能連線過去
    success_result_demo:
      Welcome to the Geth JavaScript console!

      instance: Geth/v1.7.3-unstable/linux-amd64/go1.9.2
      coinbase: 0x2a23e9223d7af9c56f5abd0c8226021b51c98cbc
      at block: 0 (Thu, 01 Jan 1970 08:00:00 CST)
       datadir: /home/yujian/.ethereum
       modules: admin:1.0 debug:1.0 eth:1.0 miner:1.0 net:1.0 personal:1.0 rpc:1.0 txpool:1.0 web3:1.0
```

* __js__
```
  　function:執行指定的js檔案
    args:<jsfile> [jsfile...]
    demo:js
    notice:
    success_result_demo:



```


* __makecache__

```
   function:生成ethhash驗證快取(測試使用)
   args:<blockNum> <outputDir>
   demo:makecache 0 /home/yujian/
   notice:
   success_result_demo:
     在對應的輸出目錄，將會生成一個cache檔案,如 cache-R23-0000000000000000
```


* __makedag__

```
   function:生成ethhash mining dag(測試使用)
   args:<blockNum> <outputDir>
   demo:makedag 0 /home/yujian/
   notice:
   success_result_demo:
     INFO [01-16|17:50:36] Generating DAG in progress               epoch=0 percentage=92 elapsed=3m2.525s
     INFO [01-16|17:50:38] Generating DAG in progress               epoch=0 percentage=93 elapsed=3m4.338s
     INFO [01-16|17:50:40] Generating DAG in progress               epoch=0 percentage=94 elapsed=3m6.058s
     INFO [01-16|17:50:41] Generating DAG in progress               epoch=0 percentage=95 elapsed=3m7.795s
     INFO [01-16|17:50:43] Generating DAG in progress               epoch=0 percentage=96 elapsed=3m9.542s
     INFO [01-16|17:50:45] Generating DAG in progress               epoch=0 percentage=97 elapsed=3m11.380s
     INFO [01-16|17:50:47] Generating DAG in progress               epoch=0 percentage=98 elapsed=3m13.129s
     INFO [01-16|17:50:49] Generating DAG in progress               epoch=0 percentage=99 elapsed=3m15.303s
     INFO [01-16|17:50:49] Generated ethash verification cache      epoch=0 elapsed=3m15.306s

     Process finished with exit code 0

     在對應的輸出目錄,將會生成一個full檔案,如 full-R23-0000000000000000


```

* __version__

```
   function:列印版本資料
   args:""
   demo:version
   notice:
   success_result_demo:
     Geth
     Version: 1.7.3-unstable
     Architecture: amd64
     Protocol Versions: [63 62]
     Network Id: 1
     Go Version: go1.9.2
     Operating System: linux
     GOPATH=/home/yujian/blockchain-workspace/go-project
     GOROOT=/usr/local/go
   　　
```

* __bug__

```
  function:開啟一個視窗,直接跳轉到ethereum的github倉庫的issue
  args:""
  demo:bug
  notice:
  success_result_demo:
  　　執行後會自動開啟瀏覽器，跳轉到ethereum的issue編輯頁面　


```

* __license__

```
   function:顯示geth的license資訊
   args:""
   demo:license
   notice:
   success_result_demo:
      Geth is free software: you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation, either version 3 of the License, or
      (at your option) any later version.

      Geth is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      GNU General Public License for more details.

      You should have received a copy of the GNU General Public License
      along with geth. If not, see <http://www.gnu.org/licenses/>.
```

* __dumpconfig__

```
  function:顯示配置資訊
  args:""
  demo:dumpconfig
  notice:
  success_result_demo:
  　[Eth]
    NetworkId = 1
    SyncMode = "fast"
    LightPeers = 20
    DatabaseCache = 128
    Etherbase = "0x2a23e9223d7af9c56f5abd0c8226021b51c98cbc"
    GasPrice = 18000000000
    EthashCacheDir = "ethash"
    EthashCachesInMem = 2
    EthashCachesOnDisk = 3
    EthashDatasetDir = "/home/yujian/.ethash"
    EthashDatasetsInMem = 1
    EthashDatasetsOnDisk = 2
    EnablePreimageRecording = false

    [Eth.TxPool]
    NoLocals = false
    Journal = "transactions.rlp"
    Rejournal = 3600000000000
    PriceLimit = 1
    PriceBump = 10
    AccountSlots = 16
    GlobalSlots = 4096
    AccountQueue = 64
    GlobalQueue = 1024
    Lifetime = 10800000000000

    [Eth.GPO]
    Blocks = 10
    Percentile = 50

    [Shh]
    MaxMessageSize = 1048576
    MinimumAcceptedPOW = 2e-01

    [Node]
    DataDir = "/home/yujian/.ethereum"
    IPCPath = "geth.ipc"
    HTTPPort = 8545
    HTTPModules = ["net", "web3", "eth", "shh"]
    WSPort = 8546
    WSModules = ["net", "web3", "eth", "shh"]

    [Node.P2P]
    MaxPeers = 25
    NoDiscovery = false
    DiscoveryV5Addr = ":30304"
    BootstrapNodes = ["enode://a979fb575495b8d6db44f750317d0f4622bf4c2aa3365d6af7c284339968eef29b69ad0dce72a4d8db5ebb4968de0e3bec910127f134779fbcb0cb6d3331163c@52.16.188.185:30303", "enode://3f1d12044546b76342d59d4a05532c14b85aa669704bfe1f864fe079415aa2c02d743e03218e57a33fb94523adb54032871a6c51b2cc5514cb7c7e35b3ed0a99@13.93.211.84:30303", "enode://78de8a0916848093c73790ead81d1928bec737d565119932b98c6b100d944b7a95e94f847f689fc723399d2e31129d182f7ef3863f2b4c820abbf3ab2722344d@191.235.84.50:30303", "enode://158f8aab45f6d19c6cbf4a089c2670541a8da11978a2f90dbf6a502a4a3bab80d288afdbeb7ec0ef6d92de563767f3b1ea9e8e334ca711e9f8e2df5a0385e8e6@13.75.154.138:30303", "enode://1118980bf48b0a3640bdba04e0fe78b1add18e1cd99bf22d53daac1fd9972ad650df52176e7c7d89d1114cfef2bc23a2959aa54998a46afcf7d91809f0855082@52.74.57.123:30303", "enode://979b7fa28feeb35a4741660a16076f1943202cb72b6af70d327f053e248bab9ba81760f39d0701ef1d8f89cc1fbd2cacba0710a12cd5314d5e0c9021aa3637f9@5.1.83.226:30303"]
    BootstrapNodesV5 = ["enode://0cc5f5ffb5d9098c8b8c62325f3797f56509bff942704687b6530992ac706e2cb946b90a34f1f19548cd3c7baccbcaea354531e5983c7d1bc0dee16ce4b6440b@40.118.3.223:30305", "enode://1c7a64d76c0334b0418c004af2f67c50e36a3be60b5e4790bdac0439d21603469a85fad36f2473c9a80eb043ae60936df905fa28f1ff614c3e5dc34f15dcd2dc@40.118.3.223:30308", "enode://85c85d7143ae8bb96924f2b54f1b3e70d8c4d367af305325d30a61385a432f247d2c75c45c6b4a60335060d072d7f5b35dd1d4c45f76941f62a4f83b6e75daaf@40.118.3.223:30309"]
    StaticNodes = []
    TrustedNodes = []
    ListenAddr = ":30303"
    EnableMsgEvents = false

    [Dashboard]
    Host = "localhost"
    Port = 8080
    Refresh = 3000000000　
```


##### 參考資料
  * [eth錢包建立](https://www.myetherwallet.com/#generate-wallet)
  * [eth命令使用解釋](http://www.blockcode.org/archives/185)







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