以太坊搭建联盟链详细教程

虫洞社区签约作者介绍

风逝 区块链 云旗天下

安装以太坊geth客户端

需要先安装go环境

安装教程

下载以太坊源码

github.com/ethereum/go-ethereum

进入 go-ethereum 目录

cd go-ethereum

make geth

然后执行make all, 顺便安装一下其他一些命令。

创建组织

在桌面创建两个文件夹，a,b 两个文件夹，代表两个组织

在两个文件夹内分别创建两个文件，genesis.json 

文件内容

{

    "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": { }

}

创建创世区块

进入a文件夹，执行命令

$ geth --datadir ./data-init1/ init genesis.json 

如果不在a 文件夹内，genesis.json 指定其相应的路径也可.

data-init1 目录专门用来存放节点数据，执行完会发现在该目录多出两个目录，一个为geth，一个为keystore，其中geth里面存放数据相关信息，keystore 里面存放加密过的的私钥文件，执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

进入b 目录，执行相同命令

$ geth --datadir ./data-init2/ init genesis.json

启动控制台

启动 a 组织

进入到 a 目录

$ geth --datadir ./data-init1/ --networkid 22 --nodiscover console

networkid : 1-4系统内部使用 大于5即可

nodiscover： 此参数确保geth不去寻找peers节点，主要是为了控制联盟链接入的节点.

这里我们需要注意的是在启动第一个节点时并没有指定port参数，因此此处采用了默认的port，

也就是30303。以下为执行时打印的日志，并进入控制台。通过日志我们也可以发现端口为

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/go1.10.3

 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

如果出现 Welcome to the Geth JavaScript console!, 则说明网络启动成功

新开一个终端，进入b目录，启动 b 组织

geth --datadir ./data-init2/ --port 30306 --networkid 22 --nodiscover console

注意，同一台电脑，a 组织已经占用30303端口，所以 b 需要换一个端口

到这里，两个组织网络都已经启动成功

###geth网络启动参数介绍

--nodiscover

使用此选项可确保未手动添加您的人员无法发现您的节点。否则，如果您的节点具有相同的创世纪文件和网络ID，则可能无意中将您的节点添加到陌生人的区块链中。

--maxpeers 0

如果您不希望任何其他人连接到您的测试链，请使用maxpeers 0。或者，如果您确切知道要连接到节点的对等端数，则可以调整此数字。

--rpc

这将在您的节点上启用RPC接口。这通常在Geth中默认启用。

--rpcapi "db,eth,net,web3"

这决定了允许通过RPC访问哪些API。默认情况下，Geth通过RPC启用web3接口。

重要提示：请注意，通过RPC / IPC接口提供API将使每个人都可以访问可以访问此接口的API（例如dapp）。请注意您启用的API。默认情况下，geth通过IPC接口启用所有API，并通过RPC接口启用db，eth，net和web3 API。

--rpcport "8080"

将8000更改为网络上打开的任何端口。geth的默认值是8080。

--rpccorsdomain "http://chriseth.github.io/browser-solidity/"

这决定了哪些URL可以连接到您的节点以执行RPC客户端任务。要非常小心，并键入一个特定的URL而不是通配符（*），它允许任何URL连接到您的RP C实例。

--datadir "/home/TestChain1"

这是您的私人链数据将存储在的数据目录中（在nubits。下选择一个与您的公共以太坊链文件夹分开的位置）。

--port "30303"

这是“网络侦听端口”，您将使用它手动连接其他对等端。

--identity "TestnetMainNode"

这将为您的节点设置一个标识，以便在对等列表中更容易识别它。以下是这些身份如何在网络上显示的示例。

控制台操作

进入以太坊 Javascript Console 后，就可以使用里面的内置对象做一些操作，这些内置对象提供的功能很丰富，比如查看区块和交易、创建账户、挖矿、发送交易、部署智能合约等。

常用命令有：

personal.newAccount()：创建账户；

personal.unlockAccount()：解锁账户；

eth.accounts：枚举系统中的账户；

eth.getBalance()：查看账户余额，返回值的单位是 Wei（Wei 是以太坊中最小货币面额单位，类似比特币中的聪，1 ether = 10^18 Wei）；

eth.blockNumber：列出区块总数；

eth.getTransaction()：获取交易；

eth.getBlock()：获取区块；

miner.start()：开始挖矿；

miner.stop()：停止挖矿；

eth.coinbase：挖矿奖励的账户

web3.fromWei()：Wei 换算成以太币；

web3.toWei()：以太币换算成 Wei；

txpool.status：交易池中的状态；

admin.addPeer()：连接到其他节点；

????????添加coinbase???????? 账户

在a节点上创建一个账户

查看a节点上所有账户

> personal.listAccounts

[]

当前为空

创建一个账户，密码是123456

> personal.newAccount("123456")

"0x0aab8ad7444c1fc908707a063297520cb10414e8"

再次查看，已经有了一个账户

> personal.listAccounts

["0x0aab8ad7444c1fc908707a063297520cb10414e8"]

在b节点也创建一个账户

> personal.newAccount("123456")

"0x406133cb63002afa6cbc43a388e8eeb4c479dfaa"

在a节点查看coinbase账户

coinbase 即节点挖矿奖励所在的账户

> eth.coinbase

INFO [09-06|18:50:56.130] Etherbase automatically configured       address=0x0AAB8Ad7444C1FC908707A063297520Cb10414E8

"0x0aab8ad7444c1fc908707a063297520cb10414e8"

coinbase账户 默认就是节点里面的第一个账户，现在每个节点都只有一个账户，都分别为coinbase账户。

修改coinbase 账户

在a节点再创建一个账户

> personal.newAccount("123456")

"0xb99db142c26690d98dc3ea1c1f10e114603c0ec0"

把a节点的coinbase账户修改为第二个账户

> miner.setEtherbase("0xb99db142c26690d98dc3ea1c1f10e114603c0ec0")

true

再次查看coinbase

> eth.coinbase

"0xb99db142c26690d98dc3ea1c1f10e114603c0ec0"

更改成功

查看节点所有的账户详情

> personal.listWallets

[{

    accounts: [{

        address: "0x0aab8ad7444c1fc908707a063297520cb10414e8",

        url: "keystore:///Users/qianjianeng/Desktop/a/data-init1/keystore/UTC--2018-09-06×××0-46-59.613429718Z--0aab8ad7444c1fc908707a063297520cb10414e8"

    }],

    status: "Locked",

    url: "keystore:///Users/qianjianeng/Desktop/a/data-init1/keystore/UTC--2018-09-06×××0-46-59.613429718Z--0aab8ad7444c1fc908707a063297520cb10414e8"

}, {

    accounts: [{

        address: "0xb99db142c26690d98dc3ea1c1f10e114603c0ec0",

        url: "keystore:///Users/qianjianeng/Desktop/a/data-init1/keystore/UTC--2018-09-06×××0-55-08.643545883Z--b99db142c26690d98dc3ea1c1f10e114603c0ec0"

    }],

    status: "Locked",

    url: "keystore:///Users/qianjianeng/Desktop/a/data-init1/keystore/UTC--2018-09-06×××0-55-08.643545883Z--b99db142c26690d98dc3ea1c1f10e114603c0ec0"

}]

联盟链互通

上面分别是在两个节点上进行的操作，下面我们需要把两个节点之间建立起链接。首先，我们执 行以下命令查看以下节点的peers的情况。

> admin.peers []

发现节点并没有链接上任何其他节点，这也是我们的nodiscover参数发挥了效果。下面就通过分享enode地址的方式来让两个节点建立链接。

查看a节点信息

> admin.nodeInfo.enode

"enode://251a655c56c514f5c4f81f2d08916622c0fff5f0b906ee82be0d976b255a7987c2743195f857b85d5d948c37a172ef365ad426193b939501a420b12ae8393ddc@[::]:30303?discport=0"

通过上面命令，我们获得了节点a的encode信息。这是geth用来连接到不同节点的enode信息，

在这些不同的节点它们能够分享交易和成功挖掘信息。

查看b节点信息

> admin.nodeInfo.enode

"enode://a16a449053ef07d7088527b46951a6439ddcacf88d4f28dc3862141dd64f5ddba67e5c959e0544d1c758d89b81d4425138ea70a0062e0a2cf4cb940bfca2f20e@[::]:30306?discport=0"

然后在a节点添加b，

a节点执行命令

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

在a节点添加b即可，无需在b节点添加a

返回true即为添加成功

再次执行命令admin.peers验证

> 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

      }

    }

}]

出现其他节点的信息，表明节点连接成功

查看节点连接数

web3.net.peerCount

以太坊单位

单位 ----------------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，客户端显示一般都是ether，转账交易时都需要将ether转换成wei

1 eth = 1e18 wei

// wei转换为ether

> web3.fromWei('22000000000000', 'ether');

"0.000022"

// ether转换为wei

> web3.toWei('1','ether')

"1000000000000000000"

查询余额

查询旷工地址余额及查询指定地址余额

> eth.getBalance(eth.coinbase)

> eth.getBalance("0x635b3b3a6b3b9840edb9531ec91193bbf15f12f5")

挖矿

> 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

查看b节点控制台可以看出，节点a在挖矿，节点b在同步数据

停止挖矿

> miner.stop()

再次查看余额

> eth.getBalance(eth.coinbase)

135000000000000000000

两个节点也可以同时挖矿

在节点a查询节点b地址的余额

 > eth.getBalance("0x7af1b2e3ccea944c64b5cd60ecc8dc9c998a211f")

145000000000000000000

节点a也能查询到节点b地址的信息和余额，说明节点a和节点b的数据是完全同步的

交易转账

现在我们从节点a的coinbase账户发送一笔交易到节点b的一个新钱包。

转账前需要先解锁账户

> personal.unlockAccount(eth.coinbase)

Unlock account 0x635b3b3a6b3b9840edb9531ec91193bbf15f12f5

Passphrase: 

true

转账完成后再次查询余额

> 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

发现余额是0，因为还没有矿工对交易进行挖矿打包。

执行挖矿

miner.start()

再次查询

> eth.getBalance("0x5048b919c2ef522b1313944718ffe0ce84e4e4b4")

1000000000000000000

一个eth 已经到账。

带gas参数的转账命令

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

智能合约

写一个简单的智能合约

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; 

    } 

}

在http://remix.ethereum.org/上编译得到

ABI和合约的二进制代码

点击右上角的 start to complie 之后，在点击下方的details

在bitecode里面的object 拿到合约的二进制代码，然后在前面补上0x.

然后在下一栏拿到ABI文件，复制得到的ABI文件带有空格，可用json工具(http://www.bejson.com/jsonviewernew)把空格去掉。

将abi代码去除空格后

[{"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"}]

然后在节点a输入

>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"

}]

在输入

> 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()

}

然后再输入二进制合约代码

> SampleHEX="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"

"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"

把合约部署到链上

> 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"

}

合约中最重要的两个信息是合约地址和合约hash，上面的contract就是合约地址，也可以通过下面的交易细节获取到合约地址

挖一会矿miner.start()后停止miner.stop()，根据合约hash查看交易细节

> 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

}

拷贝合约地址并命名，就可以拿到合约并执行合约的方法

> 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()

}

查看合约get方法

> samplecontract.get.call()

1

调用合约set方法，如果账户已经锁定，就先解锁

调用set方法后，还需要挖矿才能生效

> samplecontract.set.sendTransaction(5, {from:eth.accounts[0], gas:3000000})

INFO [09-09|18:41:44.003] Submitted transaction                    fullhash=0x282aa828d5df526b20775d696b0df8c5ad1caf88adb972d7bad796ba35977fa4 recipient=0x7D423D420C8a63D86c1116ef71ba2F5d405a7714

"0x282aa828d5df526b20775d696b0df8c5ad1caf88adb972d7bad796ba35977fa4"

然后挖矿，查看结果

> samplecontract.get.call()

5

在节点b查看节点a中部署的合约

进入节点b的终端

> 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

}

在节点b中通过合约地址获取合约，并调用合约方法

> 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"}]

> sample=eth.contract(abi)

通过合约地址获取二进制文件

> SampleHex=eth.getCode("0x7D423D420C8a63D86c1116ef71ba2F5d405a7714")

"0x60806040526004361060525763ffffffff7c01000000000000000000000000000000000000000000000000000000006000350416633fa4f2458114605757806360fe47b114607b5780636d4ce63c146092575b600080fd5b348015606257600080fd5b50606960a4565b60408051918252519081900360200190f35b348015608657600080fd5b50609060043560aa565b005b348015609d57600080fd5b50606960af565b60005481565b600055565b600054905600a165627a7a7230582084151f58c02538f867209172d079a7bc65c934502439ff9607bcfb0c1f097f000029"

通过合约地址获取到合约对象

> 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()

}

调用合约方法

> sampleContract.get.call()

5

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