關於牧場世界遊戲系統開發成熟技術（Demo）

開啟測試網路的控制檯

輸入以下命令：

geth --datadir "~/ethdev" --dev console 2>> geth.log

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這樣我們就開啟了測試網的控制檯，之後的步驟如無特別說明都將在控制檯中完成。

編寫智慧合約

> source = "contract test { function hello() returns(string s){return 'hello world!';}}"

"contract test { function hello() returns(string s){return 'hello world!';}}"

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編譯智慧合約

> contract = eth.compile.solidity(source).test

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指定建立合約的外部賬戶

我們首先需要從當前的賬戶裡選擇一個作為建立智慧合約的外部賬戶：

> address = eth.accounts[0]

"0x62b1746767522b36f6421e630fa0198151d72964"

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然後將該賬戶啟用：

> personal.unlockAccount(address,'123456',10000)

true

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最後開啟挖礦，為處理交易做準備：

> miner.start()

true

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部署合約

部署合約就是將編譯好的合約位元組碼透過外部賬號傳送交易的形式部署到以太坊區塊鏈上。輸入以下命令：

> abi = [{constant:false,inputs:null}]

[{

    constant: false,

    inputs: null

}]

> MyContract = eth.contract(abi)

{

  abi: [{

      constant: false,

      inputs: null

  }],

  eth: {

    accounts: ["0x62b1746767522b36f6421e630fa0198151d72964", "0xaa79b5468a4f4cf35a32cc976f689a5db5873f0c"],

    blockNumber: 600,

    coinbase: "0x62b1746767522b36f6421e630fa0198151d72964",

    compile: {

      lll: function(),

      serpent: function(),

      solidity: function()

    },

    defaultAccount: "0x62b1746767522b36f6421e630fa0198151d72964",

    defaultBlock: "latest",

    gasPrice: 20000000000,

    hashrate: 3302,

    mining: true,

    pendingTransactions: [],

    syncing: false,

    call: function(),

    contract: function(abi),

    estimateGas: function(),

    filter: function(fil, callback),

    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),

    getNatSpec: function(),

    getPendingTransactions: function(callback),

    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()

}

> myContract = MyContract.new({from:address,data:contract.code})

{

  abi: [{

      constant: false,

      inputs: null

  }],

  address: undefined,

  transactionHash: "0x9f0f739a5827796fc1466a09e7771eef0978262a007f8c75c789cdcf1d9c3d4b"

}