Truffle unbox 实例实现

1.Pet-shop实现

2.下载pet-shop unbox:truffle unbox pet-shop

然后直接运行：npm run dev

然后自动弹出宠物网页：http://localhost:3000/

3.Bootstrap:前端开发框架

4.步骤

打开ganache
设置metamask网络为私有Private
编写智能合约: ①实现领养功能 ②该宠物还没有被其他人领养

新建领养合约

上图中的地址就是合约地址。

编写部署文件

编译文件，传入数据 truffle compile

添加部署脚本：新建2_adopt_migration.js，复制1_initial_migration.js中的内容至2中，并作改变

做部署：truffle migrate

测试

在test文件夹中新建TestAdoption.sol

测试： truffle test

实现合约交互逻辑

在app.js中

App = {web3Provider: null,contracts: {},init: function() {// Load pets.$.getJSON('../pets.json', function(data) {var petsRow = $('#petsRow');var petTemplate = $('#petTemplate');for (i = 0; i < data.length; i ++) {petTemplate.find('.panel-title').text(data[i].name);petTemplate.find('img').attr('src', data[i].picture);petTemplate.find('.pet-breed').text(data[i].breed);petTemplate.find('.pet-age').text(data[i].age);petTemplate.find('.pet-location').text(data[i].location);petTemplate.find('.btn-adopt').attr('data-id', data[i].id);petsRow.append(petTemplate.html());}});return App.initWeb3();},initWeb3: function() {// 首先判断当前是否有web3注入if (typeof web3 != 'undefined') {App.web3Provider = web3.currentProvider; // 已注入的情况}  else {App.web3Provider = new Web3.providers.HttpProvider("http://127.0.0.1:7545");}web3 = new Web3(App.web3Provider);return App.initContract();},initContract: function() {$.getJSON('Adoption.json', function(data) {var AdoptionArtifact = data;App.contracts.Adoption = TruffleContract(AdoptionArtifact); // adopt合约实例App.contracts.Adoption.setProvider(App.web3Provider);return App.markAdopted();});return App.bindEvents();},bindEvents: function() {$(document).on('click', '.btn-adopt', App.handleAdopt);},// 当宠物领养成功，标记为已领养markAdopted: function(adopters, account) {var adoptionInstance;App.contracts.Adoption.deployed().then(function(instance) {adoptionInstance = instance;return adoptionInstance.getAdopters.call();}).then(function (adopters) {// 遍历 adopters,判断每一个宠物是否已经被领养for (i = 0; i < adopters.length; i++) {if (adopters[i] != '0x0000000000000000000000000000000000000000') {$('.panel-pet').eq(i).find('button').text('Success').attr('disabled', true);}}}).catch(function (err) {console.log(err.message);})},// 处理领养的函数handleAdopt: function(event) {event.preventDefault();var petId = parseInt($(event.target).data('id'));var adoptionInstance;web3.eth.getAccounts(function (error, accounts) {if (error) {console.log(error);}var account = accounts[0];App.contracts.Adoption.deployed().then(function (instance) {adoptionInstance = instance;// 执行领养宠物的函数return adoptionInstance.adopt(petId, {from:account});}).then(function (result) {return App.markAdopted(); // 将该宠物标记为已领养}).catch(function (err) {console.log(err.message);})})}};$(function() {// 加载$(window).load(function() {App.init();});
});