區塊鏈入門(2):搭建以太坊私有鏈(private network of ethereum),以及挖礦的操作..
在做一些測試工作的時候, 為了方便控制以及更快的進入真正的測試工作,可能需要搭建一個私有的以太坊網絡.
而以太坊節點之間能夠互相鏈接需要滿足1)相同的協議版本2)相同的networkid,所以搭建私有網絡最方便的方法就是通過geth命令中的--networkid選項,設置一個與主網不同的networkid(主網的networkid為1),這也是官方推薦的方法.
下面開始建立私有以太坊網絡:
mkdir private-geth
cd private-geth
建立創世紀區塊文件,是一個json格式的文件:
vim genesis.json
在創世紀區塊的json文件中填入以下內容, 並保存.
{
"config": {
"chainId": 15,
"homesteadBlock": 0,
"eip155Block": 0,
"eip158Block": 0
},
"coinbase" : "0x0000000000000000000000000000000000000000",
"difficulty" : "0x40000",
"extraData" : "",
"gasLimit" : "0xffffffff",
"nonce" : "0x0000000000000042",
"mixhash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000",
"timestamp" : "0x00",
"alloc": { }
}
初始化創世紀節點,並設置data目錄:
geth --datadir ./data/00 init genesis.json
啟動節點, 加上console 表示啟動後,啟用命令行:
geth --datadir ./data/00 --networkid 15 console
在有一個賬戶之前,什麽事情都不能幹....,先繼續在命令行中輸入命令,查看當前節點中的賬戶:
> eth.accounts
[]
輸出了一個"[]",說明毛都麽有一根,更別說賬戶了.既然沒有,那就來創建一個,繼續輸入命令:
> personal.newAccount("123456")
正常情況,命令行會輸出:
INFO [05-15|23:59:29] New wallet appeared url=keystore:///home/zl/Documents/p… status=Locked
"0x5b901c2495c077f515ae84fc53206f2eb3bf8296"
再用之前查看賬戶的命令看看:
> eth.accounts
["0x5b901c2495c077f515ae84fc53206f2eb3bf8296"]
有輸出了"0x5b.......96"這一串就是賬戶的地址.
賬戶有了,接下來做點更有意思的事,開始挖礦....繼續在命令行書輸出:
> miner.start()
INFO [05-16|00:07:25] Updated mining threads threads=0
INFO [05-16|00:07:25] Starting mining operation
null
INFO [05-16|00:07:25] Commit new mining work number=1 txs=0 uncles=0 elapsed=38.053ms
INFO [05-16|00:07:28] Generating DAG in progress epoch=0 percentage=0 elapsed=1.715s
INFO [05-16|00:07:30] Generating DAG in progress epoch=0 percentage=1 elapsed=3.448s
INFO [05-16|00:07:31] Generating DAG in progress epoch=0 percentage=2 elapsed=5.059s
INFO [05-16|00:07:33] Generating DAG in progress epoch=0 percentage=3 elapsed=6.799s
INFO [05-16|00:07:35] Generating DAG in progress epoch=0 percentage=4 elapsed=8.373s
...................................這個percenage=100,也就是100%以後.,就不斷的出現下面的提示.............
INFO [05-16|00:24:54] Successfully sealed new block number=36 hash=95fdfd…1411ee
INFO [05-16|00:24:54] ?? block reached canonical chain number=31 hash=438022…f6592e
.................................好多這個提示,挖到好多礦................................
INFO [05-16|00:24:54] ?? mined potential block number=36 hash=95fdfd…1411ee
INFO [05-16|00:24:54] Commit new mining work number=37 txs=0 uncles=0 elapsed=122.202μs
然後停止挖礦:
>miner.stop()
true
然後再來看看我們賬戶錢包有多少礦了:
> eth.getBalance(eth.accounts[0])
355000000000000000000
下一篇,我會講一講如何搭建 私有網絡節點群:
Setting up private network or local cluster
參考文檔:
http://ethdocs.org/en/latest/network/test-networks.html?highlight=private%20chain
https://github.com/ethereum/go-ethereum/wiki/Private-network
https://github.com/ethereum/go-ethereum/wiki/Setting-up-private-network-or-local-cluster
http://chainskills.com/2017/03/10/part-3-setup-the-private-chain-miners/
區塊鏈入門(2):搭建以太坊私有鏈(private network of ethereum),以及挖礦的操作..