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以太坊搭建联盟链详细教程

發布時間：2024/4/13 编程问答 31 豆豆

生活随笔收集整理的這篇文章主要介紹了以太坊搭建联盟链详细教程小編覺得挺不錯的,現在分享給大家,幫大家做個參考.

蟲洞社區簽約作者介紹

風逝區塊鏈云旗天下

安裝以太坊geth客戶端

需要先安裝go環境安裝教程

下載以太坊源碼 github.com/ethereum/go-ethereum

進入 go-ethereum 目錄

cd go-ethereum make geth 復制代碼

然后執行make all, 順便安裝一下其他一些命令。

創建組織

在桌面創建兩個文件夾，a,b 兩個文件夾，代表兩個組織在兩個文件夾內分別創建兩個文件，genesis.json 文件內容

{"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": { } } 復制代碼

創建創世區塊

進入a文件夾，執行命令 $ geth --datadir ./data-init1/ init genesis.json 如果不在a 文件夾內，genesis.json 指定其相應的路徑也可. data-init1 目錄專門用來存放節點數據，執行完會發現在該目錄多出兩個目錄，一個為geth，一個為keystore，其中geth里面存放數據相關信息，keystore 里面存放加密過的的私鑰文件，執行完后打印日志如下：

INFO [09-06|18:01:44.713] Maximum peer count ETH=25 LES=0 total=25 INFO [09-06|18:01:44.726] Allocated cache and file handles database=/Users/qianjianeng/Desktop/a/data-init1/geth/chaindata cache=16 handles=16 INFO [09-06|18:01:44.732] Writing custom genesis block INFO [09-06|18:01:44.732] Persisted trie from memory database nodes=0 size=0.00B time=187.096μs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B INFO [09-06|18:01:44.733] Successfully wrote genesis state database=chaindata hash=a0e580…a5e82e INFO [09-06|18:01:44.733] Allocated cache and file handles database=/Users/qianjianeng/Desktop/a/data-init1/geth/lightchaindata cache=16 handles=16 INFO [09-06|18:01:44.736] Writing custom genesis block INFO [09-06|18:01:44.736] Persisted trie from memory database nodes=0 size=0.00B time=2.156μs gcnodes=0 gcsize=0.00B gctime=0s livenodes=1 livesize=0.00B INFO [09-06|18:01:44.737] Successfully wrote genesis state database=lightchaindata hash=a0e580…a5e82e 復制代碼

進入b 目錄，執行相同命令 $ geth --datadir ./data-init2/ init genesis.json

啟動控制臺

啟動 a 組織進入到 a 目錄 $ geth --datadir ./data-init1/ --networkid 22 --nodiscover console

networkid : 1-4系統內部使用大于5即可 nodiscover：此參數確保geth不去尋找peers節點，主要是為了控制聯盟鏈接入的節點. 這里我們需要注意的是在啟動第一個節點時并沒有指定port參數，因此此處采用了默認的port，也就是30303。以下為執行時打印的日志，并進入控制臺。通過日志我們也可以發現端口為 30303。

以下是部分日志

INFO [09-06|18:16:44.901] Regenerated local transaction journal transactions=0 accounts=0 INFO [09-06|18:16:44.903] Starting P2P networking INFO [09-06|18:16:44.906] RLPx listener up self="enode://251a655c56c514f5c4f81f2d08916622c0fff5f0b906ee82be0d976b255a7987c2743195f857b85d5d948c37a172ef365ad426193b939501a420b12ae8393ddc@[::]:30303?discport=0" INFO [09-06|18:16:44.911] IPC endpoint opened url=/Users/qianjianeng/Desktop/a/data-init1/geth.ipc INFO [09-06|18:16:44.984] Mapped network port proto=tcp extport=30303 intport=30303 interface=NAT-PMP(192.168.31.1) Welcome to the Geth JavaScript console!instance: Geth/v1.8.12-stable/darwin-amd64/go1.10.3modules: 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 復制代碼

如果出現 Welcome to the Geth JavaScript console!, 則說明網絡啟動成功

新開一個終端，進入b目錄，啟動 b 組織 geth --datadir ./data-init2/ --port 30306 --networkid 22 --nodiscover console 注意，同一臺電腦，a 組織已經占用30303端口，所以 b 需要換一個端口

到這里，兩個組織網絡都已經啟動成功

###geth網絡啟動參數介紹

--nodiscover 使用此選項可確保未手動添加您的人員無法發現您的節點。否則，如果您的節點具有相同的創世紀文件和網絡ID，則可能無意中將您的節點添加到陌生人的區塊鏈中。

--maxpeers 0 如果您不希望任何其他人連接到您的測試鏈，請使用maxpeers 0。或者，如果您確切知道要連接到節點的對等端數，則可以調整此數字。

--rpc 這將在您的節點上啟用RPC接口。這通常在Geth中默認啟用。

--rpcapi "db,eth,net,web3" 這決定了允許通過RPC訪問哪些API。默認情況下，Geth通過RPC啟用web3接口。重要提示：請注意，通過RPC / IPC接口提供API將使每個人都可以訪問可以訪問此接口的API（例如dapp）。請注意您啟用的API。默認情況下，geth通過IPC接口啟用所有API，并通過RPC接口啟用db，eth，net和web3 API。

--rpcport "8080" 將8000更改為網絡上打開的任何端口。geth的默認值是8080。

--rpccorsdomain "chriseth.github.io/browser-sol…" 這決定了哪些URL可以連接到您的節點以執行RPC客戶端任務。要非常小心，并鍵入一個特定的URL而不是通配符（*），它允許任何URL連接到您的RP C實例。

--datadir "/home/TestChain1" 這是您的私人鏈數據將存儲在的數據目錄中（在nubits。下選擇一個與您的公共以太坊鏈文件夾分開的位置）。

--port "30303" 這是“網絡偵聽端口”，您將使用它手動連接其他對等端。

--identity "TestnetMainNode" 這將為您的節點設置一個標識，以便在對等列表中更容易識別它。以下是這些身份如何在網絡上顯示的示例。

控制臺操作

進入以太坊 Javascript Console 后，就可以使用里面的內置對象做一些操作，這些內置對象提供的功能很豐富，比如查看區塊和交易、創建賬戶、挖礦、發送交易、部署智能合約等。

常用命令有：

personal.newAccount()：創建賬戶；
personal.unlockAccount()：解鎖賬戶；
eth.accounts：枚舉系統中的賬戶；
eth.getBalance()：查看賬戶余額，返回值的單位是 Wei（Wei 是以太坊中最小貨幣面額單位，類似比特幣中的聰，1 ether = 10^18 Wei）；
eth.blockNumber：列出區塊總數；
eth.getTransaction()：獲取交易；
eth.getBlock()：獲取區塊；
miner.start()：開始挖礦；
miner.stop()：停止挖礦；
eth.coinbase：挖礦獎勵的賬戶
web3.fromWei()：Wei 換算成以太幣；
web3.toWei()：以太幣換算成 Wei；
txpool.status：交易池中的狀態；
admin.addPeer()：連接到其他節點；

????????添加coinbase???????? 賬戶

在a節點上創建一個賬戶查看a節點上所有賬戶

> personal.listAccounts [] 復制代碼

當前為空創建一個賬戶，密碼是123456

> personal.newAccount("123456") "0x0aab8ad7444c1fc908707a063297520cb10414e8" 復制代碼

再次查看，已經有了一個賬戶

> personal.listAccounts ["0x0aab8ad7444c1fc908707a063297520cb10414e8"] 復制代碼

在b節點也創建一個賬戶

> personal.newAccount("123456") "0x406133cb63002afa6cbc43a388e8eeb4c479dfaa" 復制代碼

在a節點查看coinbase賬戶 coinbase 即節點挖礦獎勵所在的賬戶

> eth.coinbase INFO [09-06|18:50:56.130] Etherbase automatically configured address=0x0AAB8Ad7444C1FC908707A063297520Cb10414E8 "0x0aab8ad7444c1fc908707a063297520cb10414e8" 復制代碼

coinbase賬戶默認就是節點里面的第一個賬戶，現在每個節點都只有一個賬戶，都分別為coinbase賬戶。

修改coinbase 賬戶 在a節點再創建一個賬戶

> personal.newAccount("123456") "0xb99db142c26690d98dc3ea1c1f10e114603c0ec0" 復制代碼

把a節點的coinbase賬戶修改為第二個賬戶

> miner.setEtherbase("0xb99db142c26690d98dc3ea1c1f10e114603c0ec0") true 復制代碼

再次查看coinbase

> eth.coinbase "0xb99db142c26690d98dc3ea1c1f10e114603c0ec0" 復制代碼

更改成功

查看節點所有的賬戶詳情

> personal.listWallets [{accounts: [{address: "0x0aab8ad7444c1fc908707a063297520cb10414e8",url: "keystore:///Users/qianjianeng/Desktop/a/data-init1/keystore/UTC--2018-09-06T10-46-59.613429718Z--0aab8ad7444c1fc908707a063297520cb10414e8"}],status: "Locked",url: "keystore:///Users/qianjianeng/Desktop/a/data-init1/keystore/UTC--2018-09-06T10-46-59.613429718Z--0aab8ad7444c1fc908707a063297520cb10414e8" }, {accounts: [{address: "0xb99db142c26690d98dc3ea1c1f10e114603c0ec0",url: "keystore:///Users/qianjianeng/Desktop/a/data-init1/keystore/UTC--2018-09-06T10-55-08.643545883Z--b99db142c26690d98dc3ea1c1f10e114603c0ec0"}],status: "Locked",url: "keystore:///Users/qianjianeng/Desktop/a/data-init1/keystore/UTC--2018-09-06T10-55-08.643545883Z--b99db142c26690d98dc3ea1c1f10e114603c0ec0" }] 復制代碼

聯盟鏈互通

上面分別是在兩個節點上進行的操作，下面我們需要把兩個節點之間建立起鏈接。首先，我們執行以下命令查看以下節點的peers的情況。

> admin.peers []

發現節點并沒有鏈接上任何其他節點，這也是我們的nodiscover參數發揮了效果。下面就通過分享enode地址的方式來讓兩個節點建立鏈接。

查看a節點信息

> admin.nodeInfo.enode "enode://251a655c56c514f5c4f81f2d08916622c0fff5f0b906ee82be0d976b255a7987c2743195f857b85d5d948c37a172ef365ad426193b939501a420b12ae8393ddc@[::]:30303?discport=0" 復制代碼

通過上面命令，我們獲得了節點a的encode信息。這是geth用來連接到不同節點的enode信息，

在這些不同的節點它們能夠分享交易和成功挖掘信息。查看b節點信息

> admin.nodeInfo.enode "enode://a16a449053ef07d7088527b46951a6439ddcacf88d4f28dc3862141dd64f5ddba67e5c959e0544d1c758d89b81d4425138ea70a0062e0a2cf4cb940bfca2f20e@[::]:30306?discport=0" 復制代碼

然后在a節點添加b， a節點執行命令

> admin.addPeer("enode://a16a449053ef07d7088527b46951a6439ddcacf88d4f28dc3862141dd64f5ddba67e5c959e0544d1c758d89b81d4425138ea70a0062e0a2cf4cb940bfca2f20e@[::]:30306?discport=0") 復制代碼

在a節點添加b即可，無需在b節點添加a

返回true即為添加成功再次執行命令admin.peers驗證

> admin.peers [{caps: ["eth/63"],id: "ec9aa0351cbe060366410a9c7403c4d1b76de704127a8c58dd3ad5c21e199c4bc75ab567c1ffba33bb983baefd954f9f647d4e0fb1043613fb43b18dd60824be",name: "Geth/v1.8.12-stable/darwin-amd64/go1.10.3",network: {inbound: false,localAddress: "[::1]:64810",remoteAddress: "[::1]:30306",static: true,trusted: false},protocols: {eth: {difficulty: 262144,head: "0xa0e580c6769ac3dd80894b2a256164a76b796839d2eb7f799ef6b9850ea5e82e",version: 63}} }] 復制代碼

出現其他節點的信息，表明節點連接成功

查看節點連接數 web3.net.peerCount

以太坊單位

單位 ----------------wei值-----------Wei wei ---------------- 1 ------------1 wei Kwei (babbage)------1e3 wei---------1,000 Mwei (lovelace)-----1e6 wei---------1,000,000 Gwei (shannon)------1e9 wei --------1,000,000,000 microether (szabo)--1e12 wei--------1,000,000,000,000 milliether (finney)-1e15 wei--------1,000,000,000,000,000 ether---------------1e18 wei--------1,000,000,000,000,000,000

最常用的就是wei和ether，客戶端顯示一般都是ether，轉賬交易時都需要將ether轉換成wei 1 eth = 1e18 wei

// wei轉換為ether > web3.fromWei('22000000000000', 'ether'); "0.000022"// ether轉換為wei > web3.toWei('1','ether') "1000000000000000000" 復制代碼

查詢余額

查詢曠工地址余額及查詢指定地址余額

> eth.getBalance(eth.coinbase) > eth.getBalance("0x635b3b3a6b3b9840edb9531ec91193bbf15f12f5") 復制代碼

挖礦

> miner.start()

> miner.start() INFO [09-06|22:46:00.911] Updated mining threads threads=0 INFO [09-06|22:46:00.911] Transaction pool price threshold updated price=18000000000 INFO [09-06|22:46:00.911] Starting mining operation null > INFO [09-06|22:46:00.912] Commit new mining work number=1 txs=0 uncles=0 elapsed=1.046ms INFO [09-06|22:46:09.002] Successfully sealed new block number=1 hash=300302…5db299 INFO [09-06|22:46:09.006] ???? mined potential block number=1 hash=300302…5db299 INFO [09-06|22:46:09.007] Commit new mining work number=2 txs=0 uncles=0 elapsed=874.759μs INFO [09-06|22:46:09.608] Successfully sealed new block number=2 hash=186735…3546a7 復制代碼

查看b節點控制臺可以看出，節點a在挖礦，節點b在同步數據

停止挖礦 > miner.stop()

再次查看余額

> eth.getBalance(eth.coinbase) 135000000000000000000 復制代碼

兩個節點也可以同時挖礦

在節點a查詢節點b地址的余額

> eth.getBalance("0x7af1b2e3ccea944c64b5cd60ecc8dc9c998a211f") 145000000000000000000 復制代碼

節點a也能查詢到節點b地址的信息和余額，說明節點a和節點b的數據是完全同步的

交易轉賬

現在我們從節點a的coinbase賬戶發送一筆交易到節點b的一個新錢包。轉賬前需要先解鎖賬戶

> personal.unlockAccount(eth.coinbase) Unlock account 0x635b3b3a6b3b9840edb9531ec91193bbf15f12f5 Passphrase: true 復制代碼

轉賬完成后再次查詢余額

> eth.sendTransaction({from: eth.coinbase, to: '0x5048b919c2ef522b1313944718ffe0ce84e4e4b4', value: 1000000000000000000}) INFO [09-07|10:45:46.443] Submitted transaction fullhash=0x706537c56d005b42432ac3b3d4691621efbd35894c924d7dcc3961c155c67217 recipient=0x5048B919c2ef522b1313944718FfE0cE84E4E4b4 "0x706537c56d005b42432ac3b3d4691621efbd35894c924d7dcc3961c155c67217" > eth.getBalance("0x5048b919c2ef522b1313944718ffe0ce84e4e4b4") 0 復制代碼

發現余額是0，因為還沒有礦工對交易進行挖礦打包。

執行挖礦 miner.start()

再次查詢

> eth.getBalance("0x5048b919c2ef522b1313944718ffe0ce84e4e4b4") 1000000000000000000 復制代碼

一個eth 已經到賬。

帶gas參數的轉賬命令

eth.sendTransaction({from: eth.coinbase, to: "0xa8d003b95ed969e68db9eb077ad333a3df10450a", gas:1000, 'gasPrice': web3.toWei(300, 'gwei'), "value": "1"}) 復制代碼

智能合約

寫一個簡單的智能合約

pragma solidity ^0.4.24; contract Sample { uint public value; function Sample(uint v){ value=v; }function set(uint v){ value=v; } function get() constant returns (uint){ return value; } } 復制代碼

在remix.ethereum.org/上編譯得到 ABI和合約的二進制代碼

點擊右上角的 start to complie 之后，在點擊下方的details 在bitecode里面的object 拿到合約的二進制代碼，然后在前面補上0x. 然后在下一欄拿到ABI文件，復制得到的ABI文件帶有空格，可用json工具(www.bejson.com/jsonviewern…)把空格去掉。

將abi代碼去除空格后

[{"constant":true,"inputs":[],"name":"value","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"v","type":"uint256"}],"name":"set","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"get","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"v","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"}] 復制代碼

然后在節點a輸入

>abi=[{"constant":true,"inputs":[],"name":"value","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"v","type":"uint256"}],"name":"set","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"get","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"v","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"}] [{constant: true,inputs: [],name: "value",outputs: [{name: "",type: "uint256"}],payable: false,stateMutability: "view",type: "function" }, {constant: false,inputs: [{name: "v",type: "uint256"}],name: "set",outputs: [],payable: false,stateMutability: "nonpayable",type: "function" }, {constant: true,inputs: [],name: "get",outputs: [{name: "",type: "uint256"}],payable: false,stateMutability: "view",type: "function" }, {inputs: [{name: "v",type: "uint256"}],payable: false,stateMutability: "nonpayable",type: "constructor" }] 復制代碼

在輸入

> sample=eth.contract(abi) {abi: [{constant: true,inputs: [],name: "value",outputs: [{...}],payable: false,stateMutability: "view",type: "function"}, {constant: false,inputs: [{...}],name: "set",outputs: [],payable: false,stateMutability: "nonpayable",type: "function"}, {constant: true,inputs: [],name: "get",outputs: [{...}],payable: false,stateMutability: "view",type: "function"}, {inputs: [{...}],payable: false,stateMutability: "nonpayable",type: "constructor"}],eth: {accounts: ["0x635b3b3a6b3b9840edb9531ec91193bbf15f12f5"],blockNumber: 79,coinbase: "0x635b3b3a6b3b9840edb9531ec91193bbf15f12f5",compile: {lll: function(),serpent: function(),solidity: function()},defaultAccount: undefined,defaultBlock: "latest",gasPrice: 18000000000,hashrate: 0,mining: false,pendingTransactions: [],protocolVersion: "0x3f",syncing: false,call: function(),contract: function(abi),estimateGas: function(),filter: function(options, callback, filterCreationErrorCallback),getAccounts: function(callback),getBalance: function(),getBlock: function(),getBlockNumber: function(callback),getBlockTransactionCount: function(),getBlockUncleCount: function(),getCode: function(),getCoinbase: function(callback),getCompilers: function(),getGasPrice: function(callback),getHashrate: function(callback),getMining: function(callback),getPendingTransactions: function(callback),getProtocolVersion: function(callback),getRawTransaction: function(),getRawTransactionFromBlock: function(),getStorageAt: function(),getSyncing: function(callback),getTransaction: function(),getTransactionCount: function(),getTransactionFromBlock: function(),getTransactionReceipt: function(),getUncle: function(),getWork: function(),iban: function(iban),icapNamereg: function(),isSyncing: function(callback),namereg: function(),resend: function(),sendIBANTransaction: function(),sendRawTransaction: function(),sendTransaction: function(),sign: function(),signTransaction: function(),submitTransaction: function(),submitWork: function()},at: function(address, callback),getData: function(),new: function() } 復制代碼

然后再輸入二進制合約代碼

> SampleHEX="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" "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" 復制代碼

把合約部署到鏈上

> personal.unlockAccount(eth.coinbase) Unlock account 0x635b3b3a6b3b9840edb9531ec91193bbf15f12f5 Passphrase: true > thesample=sample.new(1,{from:eth.accounts[0],data:SampleHEX,gas:3000000}) INFO [09-09|18:30:33.352] Submitted contract creation fullhash=0xd507ca17f199c014a153c08b221107e01c6365c7d10eb609bdad99535de7dd16 contract=0x7D423D420C8a63D86c1116ef71ba2F5d405a7714 {abi: [{constant: true,inputs: [],name: "value",outputs: [{...}],payable: false,stateMutability: "view",type: "function"}, {constant: false,inputs: [{...}],name: "set",outputs: [],payable: false,stateMutability: "nonpayable",type: "function"}, {constant: true,inputs: [],name: "get",outputs: [{...}],payable: false,stateMutability: "view",type: "function"}, {inputs: [{...}],payable: false,stateMutability: "nonpayable",type: "constructor"}],address: undefined,transactionHash: "0xd507ca17f199c014a153c08b221107e01c6365c7d10eb609bdad99535de7dd16" } 復制代碼

合約中最重要的兩個信息是合約地址和合約hash，上面的contract就是合約地址，也可以通過下面的交易細節獲取到合約地址

挖一會礦miner.start()后停止miner.stop()，根據合約hash查看交易細節

> samplerecpt=eth.getTransactionReceipt("0xd507ca17f199c014a153c08b221107e01c6365c7d10eb609bdad99535de7dd16") {blockHash: "0x54bb9756e7310deff7192a6184833e76d2b203334093aac97b773a8d11081705",blockNumber: 80,contractAddress: "0x7d423d420c8a63d86c1116ef71ba2f5d405a7714",cumulativeGasUsed: 134093,from: "0x635b3b3a6b3b9840edb9531ec91193bbf15f12f5",gasUsed: 134093,logs: [],logsBloom: "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",root: "0xe88933bb56dd158847b0cf443b896be470f0ebd1d44d2e78bac023b1a3ff77d3",to: null,transactionHash: "0xd507ca17f199c014a153c08b221107e01c6365c7d10eb609bdad99535de7dd16",transactionIndex: 0 } 復制代碼

拷貝合約地址并命名，就可以拿到合約并執行合約的方法

> samplecontract=sample.at("0x7D423D420C8a63D86c1116ef71ba2F5d405a7714") {abi: [{constant: true,inputs: [],name: "value",outputs: [{...}],payable: false,stateMutability: "view",type: "function"}, {constant: false,inputs: [{...}],name: "set",outputs: [],payable: false,stateMutability: "nonpayable",type: "function"}, {constant: true,inputs: [],name: "get",outputs: [{...}],payable: false,stateMutability: "view",type: "function"}, {inputs: [{...}],payable: false,stateMutability: "nonpayable",type: "constructor"}],address: "0x7D423D420C8a63D86c1116ef71ba2F5d405a7714",transactionHash: null,allEvents: function(),get: function(),set: function(),value: function() } 復制代碼

查看合約get方法

> samplecontract.get.call() 1 復制代碼

調用合約set方法，如果賬戶已經鎖定，就先解鎖調用set方法后，還需要挖礦才能生效

> samplecontract.set.sendTransaction(5, {from:eth.accounts[0], gas:3000000}) INFO [09-09|18:41:44.003] Submitted transaction fullhash=0x282aa828d5df526b20775d696b0df8c5ad1caf88adb972d7bad796ba35977fa4 recipient=0x7D423D420C8a63D86c1116ef71ba2F5d405a7714 "0x282aa828d5df526b20775d696b0df8c5ad1caf88adb972d7bad796ba35977fa4" 復制代碼

然后挖礦，查看結果

> samplecontract.get.call() 5 復制代碼

在節點b查看節點a中部署的合約進入節點b的終端

在節點b中通過合約地址獲取合約，并調用合約方法

> sample=eth.contract(abi)

通過合約地址獲取二進制文件

> SampleHex=eth.getCode("0x7D423D420C8a63D86c1116ef71ba2F5d405a7714") "0x60806040526004361060525763ffffffff7c01000000000000000000000000000000000000000000000000000000006000350416633fa4f2458114605757806360fe47b114607b5780636d4ce63c146092575b600080fd5b348015606257600080fd5b50606960a4565b60408051918252519081900360200190f35b348015608657600080fd5b50609060043560aa565b005b348015609d57600080fd5b50606960af565b60005481565b600055565b600054905600a165627a7a7230582084151f58c02538f867209172d079a7bc65c934502439ff9607bcfb0c1f097f000029" 復制代碼

通過合約地址獲取到合約對象

> sampleContract=sample.at("0x7D423D420C8a63D86c1116ef71ba2F5d405a7714") {abi: [{constant: true,inputs: [],name: "value",outputs: [{...}],payable: false,stateMutability: "view",type: "function"}, {constant: false,inputs: [{...}],name: "set",outputs: [],payable: false,stateMutability: "nonpayable",type: "function"}, {constant: true,inputs: [],name: "get",outputs: [{...}],payable: false,stateMutability: "view",type: "function"}, {inputs: [{...}],payable: false,stateMutability: "nonpayable",type: "constructor"}],address: "0x7D423D420C8a63D86c1116ef71ba2F5d405a7714",transactionHash: null,allEvents: function(),get: function(),set: function(),value: function() } 復制代碼

調用合約方法

> sampleContract.get.call() 5 復制代碼

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