以太坊联盟链quorum搭建（二）

本篇文章介绍通过truffle来部署智能合约。

1、首先需要有一个联盟链quorum的环境，如上篇文章所示。

2、部署合约，这里介绍两种方法，一是教程里的使用solc编译，获取编译后的abi和bytecode，然后在geth控制台里部署；第二种方法是使用truffle直接部署。

下面分别介绍：

（1）使用solc编译

智能合约文件：simplestorage.sol

pragma solidity ^0.4.15;

contract simplestorage {
  uint public storedData;

  function simplestorage(uint initVal) public {
    storedData = initVal;
  }

  function set(uint x) public {
    storedData = x;
  }

  function get() constant public returns(uint retVal) {
    return storedData;
  }
}

编译：

solcjs --bin --abi simplestorage.sol

会生成两个文件： simplestorage_sol_simplestorage.abi 和 simplestorage_sol_simplestorage.bin分别是abi和bytecode，在部署时会用到。（或者使用在线编译器remix，更加方便）

然后进入geth客户端（第一个节点）：

geth attach qdata/dd1/geth.ipc

然后在部署合约和调用合约：

> var abi = [{"constant":true,"inputs":[],"name":"storedData","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"x","type":"uint256"}],"name":"set","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"get","outputs":[{"name":"retVal","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"initVal","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"}]
undefined
> var bytecode = "0x6060604052341561000f57600080fd5b60405160208061014b833981016040528080519060200190919050508060008190555050610109806100426000396000f3006060604052600436106053576000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff1680632a1afcd914605857806360fe47b114607e5780636d4ce63c14609e575b600080fd5b3415606257600080fd5b606860c4565b6040518082815260200191505060405180910390f35b3415608857600080fd5b609c600480803590602001909190505060ca565b005b341560a857600080fd5b60ae60d4565b6040518082815260200191505060405180910390f35b60005481565b8060008190555050565b600080549050905600a165627a7a72305820e0660d73fff0ee27ccbbbb63012dedeb1191c88555c15f78e81c856f58125d9a0029"
undefined
> var simpleContract = web3.eth.contract(abi);
undefined
> simpleContract.new(42, {from:web3.eth.accounts[0], data: bytecode, gas: 0x47b760, privateFor: ["ROAZBWtSacxXQrOe3FGAqJDyJjFePR5ce4TSIzmJ0Bc="]})
{
  abi: [{
      constant: true,
      inputs: [],
      name: "storedData",
      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: "0x5c7fc60d8370bed6eb14e3f776365f77806eda9653e6a3f682827f68e056c0f8"
}

部署成功，其中simpleContract.new中

privateFor: ["ROAZBWtSacxXQrOe3FGAqJDyJjFePR5ce4TSIzmJ0Bc="]}

是指明这个合约是私有合约，只有创建合约的节点1和地址代表的节点7可以正常调用。下面节点1调用合约，需要用地址和abi来加载已经部署好的合约，其中地址在日志文件/qdata/logs/1.log中，找到这么一行：

INFO [06-07|19:57:38] Submitted contract creation              fullhash=0x5c7fc60d8370bed6eb14e3f776365f77806eda9653e6a3f682827f68e056c0f8 to=0x4D3bfd7821E237fFE84209d8E638f9f309865b87

to后面的地址就是合约的地址，

> var private = eth.contract(abi).at("0x4D3bfd7821E237fFE84209d8E638f9f309865b87")
undefined
> private.get()
42

然后节点2调用合约，同样需要地址和abi来加载合约，执行结果：

> private.get()
0

节点7执行合约：

> private.get()
42

然后在节点1调用set，改变数值：

> private.set(65656, {from:eth.coinbase, privateFor:["ROAZBWtSacxXQrOe3FGAqJDyJjFePR5ce4TSIzmJ0Bc="]})
"0xb42a5483ef98f6a7b3dc35d7ffaaf0170360de63fb7d14c8514532906fb10395"
> private.get()
65656

同样在节点2和节点7获取修改的值，结果分别为0和65656

到此，部署和调用智能合约结束。

（2）下面介绍使用truffle来部署智能合约(这里使用truffle主要是编译和部署合约)

新建一个目录test，然后进入目录初始化一个truffle项目：

truffle init

然后在contracts目录中编写智能合约：

pragma solidity ^0.4.15;

contract simplestorage {
  uint public storedData;

  function simplestorage(uint initVal) public {
    storedData = initVal;
  }

  function set(uint x) public {
    storedData = x;
  }

  function get() constant public returns(uint retVal) {
    return storedData;
  }
}

在test目录下编译合约：

truffle compile

部署合约：

在migrations文件夹里添加新的部署文件：

2_deploy_simplestorage.js

var simple_storage = artifacts.require("SimpleStorage");

module.exports = function(deployer) {
    deployer.deploy(simple_storage, 123, {privateFor:["ROAZBWtSacxXQrOe3FGAqJDyJjFePR5ce4TSIzmJ0Bc="]});
};

修改truffle.js文件：

module.exports = {
  networks: {
        development: {
            host: "localhost",
            port: 22000,
            network_id: "*",
            gas: 4600000,
            gasPrice: 0
        },
        second_node: {
            host: "localhost",
            port: 22001,
            network_id: "*",
            gas: 4600000,
            gasPrice: 0
        },
        third_node: {
            host: "localhost",
            port: 22002,
            network_id: "*",
            gas: 4600000,
            gasPrice: 0
        },
	  forth_node: {
		host: "localhost",
		port:22003,
		network_id: "*",
		gas: 4600000,
		gasPrice: 0
	},
	  fifth_node:{
		host: "localhost",
		port: 22004,
		network_id: "*",
		gas: 4600000,
		gasPrice: 0
	},
 	sixth_node: {
		host: "localhost", 
		port: 22005,
	   	network_id: "*",
		gas: 4600000,
		gasPrice: 0	
 	},
	 seventh_node: {
		host: "localhost",
		port: 22006,
		network_id: "*",
		gas: 4600000,
		gasPrice: 0
	  }
    }
};

在test目录下执行命令：truffle migrate --network development --reset

>truffle migrate --network development --reset
Running migration: 1_initial_migration.js
  Replacing Migrations...
  ... 0x3d22b37608222c33cf2485bbcd746f46979e76e2c31f1be96571098a958f230f
  Migrations: 0xd9d64b7dc034fafdba5dc2902875a67b5d586420
Saving successful migration to network...
  ... 0x7b6d86cadb782c0e41a35f6ebd64dd4650ccb7a7a11f6b07e63df6fcaba2311e
Saving artifacts...
Running migration: 2_deploy_simplestorage.js
  Replacing simplestorage...
  ... 0x43ad5af6cf9276a78febde309b7f214af988797d62fb9ecc71f7a879cbbc6306
  simplestorage: 0x938781b9796aea6376e40ca158f67fa89d5d8a18
Saving successful migration to network...
  ... 0xb9dce27942015a3a93b0f6475cc3ef59b1bc82405b90faaaa4053e8eeb835886
Saving artifacts...

其中倒数第四行中是合约的地址。

3、进入geth控制台

geth attach qdata/dd1/geth.ipc

合约地址和abi加载合约，再调用。这里就和上面方法一样了，不再重复。

以太坊联盟链quorum搭建（二）

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