本文首发自我的CSDN博客，原文链接如下
blog.csdn.net/diandianxiy…

目标

• 搭建开发环境
• 创建一个Truffle项目
• 编写智能合约
• 编译转移智能合约
• 测试智能合约
• 创建用户界面连接智能合约
• 在浏览器中访问Dapp

搭建开发环境

• Node.js v6+ LTS and npm (comes with Node)
• Git

这里配置脚本略过。。。。

xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ node -v
v8.5.0xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ npm -v
5.4.2xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ git --version
git version 2.13.5 (Apple Git-94)复制代码

xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ npm install -g ethereumjs-testrpc
/usr/local/bin/testrpc -> /usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js> fsevents@1.1.2 install /usr/local/lib/node_modules/ethereumjs-testrpc/node_modules/fsevents
> node installevents.js:182throw er; // Unhandled 'error' event^Error: spawn node-pre-gyp ENOENTat _errnoException (util.js:1026:11)at Process.ChildProcess._handle.onexit (internal/child_process.js:192:19)at onErrorNT (internal/child_process.js:374:16)at _combinedTickCallback (internal/process/next_tick.js:138:11)at process._tickCallback (internal/process/next_tick.js:180:9)at Function.Module.runMain (module.js:667:11)at startup (bootstrap_node.js:201:16)at bootstrap_node.js:626:3> uglifyjs-webpack-plugin@0.4.6 postinstall /usr/local/lib/node_modules/ethereumjs-testrpc/node_modules/uglifyjs-webpack-plugin
> node lib/post_install.jsnpm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 (node_modules/ethereumjs-testrpc/node_modules/fsevents):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 install: `node install`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1+ ethereumjs-testrpc@4.1.3
added 2 packages, removed 475 packages, updated 238 packages and moved 1 package in 293.194s╭─────────────────────────────────────╮│                                     ││   Update available 5.4.2 → 5.5.1    ││     Run npm i -g npm to update      ││                                     │╰─────────────────────────────────────╯xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ npm i -g npm to update
/usr/local/bin/npm -> /usr/local/lib/node_modules/npm/bin/npm-cli.js
/usr/local/bin/npx -> /usr/local/lib/node_modules/npm/bin/npx-cli.js
/usr/local/bin/update -> /usr/local/lib/node_modules/update/bin/update.js
+ update@0.7.4
+ npm@5.5.1
+ to@0.2.9
added 708 packages, removed 2 packages and updated 29 packages in 434.067sxiaoyu@LIXIAOYUdeMacBook-Pro.com➤ sudo  npm install -g ethereumjs-testrpc
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules/ethereumjs-testrpc/node_modules/_yargs@3.10.0@yargs/node_modules/cliui
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules/ethereumjs-testrpc/node_modules/_yargs@3.10.0@yargs/node_modules/decamelize
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules/ethereumjs-testrpc/node_modules/_strip-ansi@3.0.1@strip-ansi/node_modules/ansi-regex
npm ERR! path /usr/local/lib/node_modules/ethereumjs-testrpc/node_modules/_yargs@3.10.0@yargs/node_modules/cliui
npm ERR! code ENOENT
npm ERR! errno -2
npm ERR! syscall access
npm ERR! enoent ENOENT: no such file or directory, access '/usr/local/lib/node_modules/ethereumjs-testrpc/node_modules/_yargs@3.10.0@yargs/node_modules/cliui'
npm ERR! enoent This is related to npm not being able to find a file.
npm ERR! enoent npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/xiaoyu/.npm/_logs/2017-10-26T08_09_48_018Z-debug.logxiaoyu@LIXIAOYUdeMacBook-Pro.com➤ npm install -g truffle
/usr/local/bin/truffle -> /usr/local/lib/node_modules/truffle/build/cli.bundled.js
+ truffle@3.4.11
removed 105 packages and updated 91 packages in 89.658s复制代码

用Truffle Box创建一个Truffle项目

❖  ~/solidity [16:15:01]
xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ mkdir pet-shop-tutorial
❖  ~/solidity [16:15:06]
xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ cd pet-shop-tutorialxiaoyu@LIXIAOYUdeMacBook-Pro.com➤ truffle unbox pet-shop
Downloading...
Unpacking...
Setting up...复制代码

目录结构

/contracts 智能合约
/migrations 迁移系统来处理智能合约部署
/test 测试
truffle.js 配置文件

其他部分是nodejs的配置文件以及文件夹

编写智能合约

在contracts中创建Adoption.sol文件

pragma solidity ^0.4.4;

contract Adoption {

    address[16] public adopters; //存储地址

    //采用一个宠物    function adopt(uint petId) public returns (uint) {        require(petId >= 0 && petId <= 15);

        adopters[petId] = msg.sender;

        return petId;    }

    //返回采用者    function getAdopters() public returns (address[16]) {        return adopters;    }}复制代码

编译转移智能合约

EVM的测试环境

打开另一个窗口

xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ testrpc -p 8588
EthereumJS TestRPC v4.1.3 (ganache-core: 1.1.3)Available Accounts
==================
(0) 0xd2a54e8087d88889e1857698ceb228493b67bab6
(1) 0x44d32639c3803b9daa7392ff2ea50644153d7721
(2) 0x32d951e2f319edb079764b1c75864497a3132446
(3) 0x82244a630d6031be85ca298376cfa2bd6c7389a6
(4) 0xd3b556b69eb670a250bbc3f15ebefb081d4c7108
(5) 0x9f50cf1b425c6ca97de0128e46a21abd7bda3258
(6) 0x8e0545a4fe9eac1bb2f4683f0c6b36cd4a364a40
(7) 0x200b052f6eaeaa1dc11abcc3101b7a8aca293e70
(8) 0xcbd4c8b9d264367d385d4938c3b390a2eb0f2a62
(9) 0xa769a296f0bbab07e48ca62da5ad5aea4c920580Private Keys
==================
(0) a4f66a0654bbd1338a0cc9264624ad9f710f5cd65bbd4aed6f0b20706335e573
(1) cab64a11662597c79a9e866865efbec4b2e1701ed21783f68a61162937baaf8a
(2) 9f52f1c63923b390b438212bdd4594d3b479b22024bd193b8a3a600572f697af
(3) 452b11e8ea19803b44b474d86c13d7325a387459abe634ad1c64b13eb26d0745
(4) a663ff82b20002942c491e393951e5e366d8cceeff89732690f974f709243260
(5) 7410aba40135ee4fea322a13403b081939d245e7ed534e016090657cbdb6183c
(6) 269e44a7c17d591d23a694539a8d6feee3d9894182d4bc663a2f51fc33a3f540
(7) 4f70e8c8f25a1ef2e9057a1b25053d6bceca46b68dfc0548e0c96b16fa9af5eb
(8) 6114321e07ba8248509c17f4f0318aaf0edd972986f43ec652a2030b6cfe18bd
(9) 37cacf13d9833bb3c63c657b42fed5f87f3806cca4d1cd400cbc5f7c8c2a3cc1HD Wallet
==================
Mnemonic:      better become piano october library quarter festival ability arrow patch fringe practice
Base HD Path:  m/44'/60'/0'/0/{account_index}Listening on localhost:8588复制代码

这里注意，我的测试demo指定了端口，那么也要修改对应的配置文件。

truffle.jsmodule.exports = {networks: {development: {host: "localhost",port: 8588,network_id: "*" // Match any network id}}
};复制代码

编译智能合约

❖  ~/solidity/pet-shop-tutorial [16:27:59]
xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ truffle compile
Compiling ./contracts/Adoption.sol...
Compiling ./contracts/Migrations.sol...
Writing artifacts to ./build/contracts复制代码

迁移智能合约

查看项目目录，会发现migrations目录中已经存在了一个文件1_initial_migration.js

我们开始创建第二个文件2_deploy_contracts.js

var Adoption = artifacts.require("./Adoption.sol");module.exports = function(deployer) {deployer.deploy(Adoption);
};复制代码

执行迁移

❖  ~/solidity/pet-shop-tutorial [16:53:30]
xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ truffle migrate
Using network 'development'.Running migration: 1_initial_migration.jsDeploying Migrations...... 0x09db8962f99c5e5bdb316882c9f3aff69244df68664c6d90dda7e8c9f5249809Migrations: 0xf7345735ec00a0b797e5469a49b5deaf9131659f
Saving successful migration to network...... 0xb6f330b833176db1e94d24c84bab618b6c9205585e9803f7c6fe21f14fec179a
Saving artifacts...
Running migration: 2_deploy_contracts.jsDeploying Adoption...... 0xb93b24287ebba0dfd091e62fb9d55e188a76412097fdae4a7caf1520b9aaabb9Adoption: 0x424bc3aeeeb6d0a0e0ed8271ce7764b6ad336c7a
Saving successful migration to network...... 0x26f08c9da8a6ec12f4edece8a6344a9030bb7fbd97f3b1a4592b93f4aec2dc39
Saving artifacts...复制代码

同时，你在testrpc上还能看到下面的输出

Listening on localhost:8588
net_version
eth_accounts
eth_accounts
net_version
net_version
eth_sendTransactionTransaction: 0x09db8962f99c5e5bdb316882c9f3aff69244df68664c6d90dda7e8c9f5249809Contract created: 0xf7345735ec00a0b797e5469a49b5deaf9131659fGas usage: 201556Block Number: 1Block Time: Thu Oct 26 2017 16:58:31 GMT+0800 (CST)eth_newBlockFilter
eth_getFilterChanges
eth_getTransactionReceipt
eth_getCode
eth_uninstallFilter
eth_sendTransactionTransaction: 0xb6f330b833176db1e94d24c84bab618b6c9205585e9803f7c6fe21f14fec179aGas usage: 41965Block Number: 2Block Time: Thu Oct 26 2017 16:58:31 GMT+0800 (CST)eth_getTransactionReceipt
eth_accounts
net_version
net_version
eth_sendTransactionTransaction: 0xb93b24287ebba0dfd091e62fb9d55e188a76412097fdae4a7caf1520b9aaabb9Contract created: 0x424bc3aeeeb6d0a0e0ed8271ce7764b6ad336c7aGas usage: 213057Block Number: 3Block Time: Thu Oct 26 2017 16:58:31 GMT+0800 (CST)eth_newBlockFilter
eth_getFilterChanges
eth_getTransactionReceipt
eth_getCode
eth_uninstallFilter
eth_sendTransactionTransaction: 0x26f08c9da8a6ec12f4edece8a6344a9030bb7fbd97f3b1a4592b93f4aec2dc39Gas usage: 26965Block Number: 4Block Time: Thu Oct 26 2017 16:58:31 GMT+0800 (CST)eth_getTransactionReceipt复制代码

测试智能合约

在test文件夹中创建文件TestAdoption.sol

pragma solidity ^0.4.11;

import "truffle/Assert.sol"; //truffle公共的库import "truffle/DeployedAddresses.sol"; //truffle公共的库import "../contracts/Adoption.sol";

contract TestAdoption {    Adoption adoption = Adoption(DeployedAddresses.Adoption());

    // 测试 adopt()    function testUserCanAdoptPet() {        uint returnedId = adoption.adopt(8); //调用输入参数

        uint expected = 8; //期望的结果

        Assert.equal(returnedId, expected, "Adoption of pet ID 8 should be recorded."); //判断如果没有就抛出异常    }

    // 单个测试    function testGetAdopterAddressByPetId() {

        address expected = this;

        address adopter = adoption.adopters(8);

        Assert.equal(adopter, expected, "Owner of pet ID 8 should be recorded.");    }

    // 所有的测试    function testGetAdopterAddressByPetIdInArray() {

        address expected = this;

        address[16] memory adopters = adoption.getAdopters();

        Assert.equal(adopters[8], expected, "Owner of pet ID 8 should be recorded.");    }

}复制代码

运行测试命令

xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ truffle test
Using network 'development'.Compiling ./contracts/Adoption.sol...
Compiling ./test/TestAdoption.sol...
Compiling truffle/Assert.sol...
Compiling truffle/DeployedAddresses.sol...Compilation warnings encountered:truffle/Assert.sol:114:20: Warning: This declaration shadows an existing declaration.function equal(string A, string B, string message) constant returns (bool result) {^------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:137:23: Warning: This declaration shadows an existing declaration.function notEqual(string A, string B, string message) constant returns (bool result) {^------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:206:20: Warning: This declaration shadows an existing declaration.function equal(bytes32 A, bytes32 B, string message) constant returns (bool result) {^-------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:226:23: Warning: This declaration shadows an existing declaration.function notEqual(bytes32 A, bytes32 B, string message) constant returns (bool result) {^-------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:286:20: Warning: This declaration shadows an existing declaration.function equal(address A, address B, string message) constant returns (bool result) {^-------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:305:23: Warning: This declaration shadows an existing declaration.function notEqual(address A, address B, string message) constant returns (bool result) {^-------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:403:20: Warning: This declaration shadows an existing declaration.function equal(bool A, bool B, string message) constant returns (bool result) {^----^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:426:23: Warning: This declaration shadows an existing declaration.function notEqual(bool A, bool B, string message) constant returns (bool result) {^----^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:451:20: Warning: This declaration shadows an existing declaration.function equal(uint A, uint B, string message) constant returns (bool result) {^----^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:474:23: Warning: This declaration shadows an existing declaration.function notEqual(uint A, uint B, string message) constant returns (bool result) {^----^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:497:22: Warning: This declaration shadows an existing declaration.function isAbove(uint A, uint B, string message) constant returns (bool result) {^----^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:520:24: Warning: This declaration shadows an existing declaration.function isAtLeast(uint A, uint B, string message) constant returns (bool result) {^----^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:543:22: Warning: This declaration shadows an existing declaration.function isBelow(uint A, uint B, string message) constant returns (bool result) {^----^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:566:23: Warning: This declaration shadows an existing declaration.function isAtMost(uint A, uint B, string message) constant returns (bool result) {^----^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:635:20: Warning: This declaration shadows an existing declaration.function equal(int A, int B, string message) constant returns (bool result) {^---^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:658:23: Warning: This declaration shadows an existing declaration.function notEqual(int A, int B, string message) constant returns (bool result) {^---^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:681:22: Warning: This declaration shadows an existing declaration.function isAbove(int A, int B, string message) constant returns (bool result) {^---^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:704:24: Warning: This declaration shadows an existing declaration.function isAtLeast(int A, int B, string message) constant returns (bool result) {^---^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:727:22: Warning: This declaration shadows an existing declaration.function isBelow(int A, int B, string message) constant returns (bool result) {^---^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:750:23: Warning: This declaration shadows an existing declaration.function isAtMost(int A, int B, string message) constant returns (bool result) {^---^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:1267:27: Warning: This declaration shadows an existing declaration.function balanceEqual(address A, uint b, string message) constant returns (bool result) {^-------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:1287:30: Warning: This declaration shadows an existing declaration.function balanceNotEqual(address A, uint b, string message) constant returns (bool result) {^-------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:1306:28: Warning: This declaration shadows an existing declaration.function balanceIsZero(address A, string message) constant returns (bool result) {^-------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^,truffle/Assert.sol:1325:31: Warning: This declaration shadows an existing declaration.function balanceIsNotZero(address A, string message) constant returns (bool result) {^-------^
truffle/Assert.sol:64:5: The shadowed declaration is here:uint8 constant A = uint8(byte('a'));^---------------------------------^TestAdoption✓ testUserCanAdoptPet (100ms)✓ testGetAdopterAddressByPetId (106ms)✓ testGetAdopterAddressByPetIdInArray (119ms)3 passing (912ms)复制代码

同时，在testrpc窗口中，输出如下内容

net_version
eth_accounts
eth_accounts
eth_accounts
eth_sendTransactionTransaction: 0x0248e4f5b8ed0130b6c04fb0628747948c4430b2db32ae4b4aecc5837c95a7a9Contract created: 0x44d5b51c7a790edf595f36f647d8782ab95d2043Gas usage: 201556Block Number: 5Block Time: Thu Oct 26 2017 17:29:40 GMT+0800 (CST)eth_newBlockFilter
eth_getFilterChanges
eth_getTransactionReceipt
eth_getCode
eth_uninstallFilter
eth_sendTransactionTransaction: 0xf25d861fa237ca89ece917d3bfcae990b00253a213e3dfe977c808727bb41621Gas usage: 41965Block Number: 6Block Time: Thu Oct 26 2017 17:29:40 GMT+0800 (CST)eth_getTransactionReceipt
eth_accounts
eth_sendTransactionTransaction: 0x3bc4a4f9a6a29e336135a0617b9dcda72af62f8ed6ba8cdcb52e2c13b9c0b9c1Contract created: 0x7e434775cefce86de3c944aeb840b80ffa397e6fGas usage: 213057Block Number: 7Block Time: Thu Oct 26 2017 17:29:40 GMT+0800 (CST)eth_newBlockFilter
eth_getFilterChanges
eth_getTransactionReceipt
eth_getCode
eth_uninstallFilter
eth_sendTransactionTransaction: 0x8e9a560c91b97f4fe1020f9e4154b063391d4e1b6da522a80e78d572e18e3864Gas usage: 26965Block Number: 8Block Time: Thu Oct 26 2017 17:29:40 GMT+0800 (CST)eth_getTransactionReceipt
evm_snapshot
Saved snapshot #1
net_version
eth_sendTransaction
net_version
eth_sendTransactionTransaction: 0xbcca837fc7693ae43eef2210f88f5b59ada90c2c56250558bdee776417c6ce8dContract created: 0x16e910a876a0ef1ad4fceb7b15b0ed1e34212a3fGas usage: 141661Block Number: 9Block Time: Thu Oct 26 2017 17:29:40 GMT+0800 (CST)eth_newBlockFilterTransaction: 0x8ad5172333283066102aada539d0b17f14a3a13b5bc996b8baca49296d625045Contract created: 0x7d49d66afb1fa72446cbbeb2dc7f43237a2895d9Gas usage: 4630196Block Number: 10Block Time: Thu Oct 26 2017 17:29:40 GMT+0800 (CST)eth_newBlockFilter
eth_getFilterChanges
eth_getFilterChanges
eth_getTransactionReceipt
eth_getTransactionReceipt
eth_getCode
eth_getCode
eth_uninstallFilter
eth_uninstallFilter
eth_sendTransactionTransaction: 0x4a9374f9c1da7266c44b9c3f191572a79938bf446e9261a910904fbd86b019efContract created: 0x2411f93ad68e7a071ad6b116614d4a45049a2e36Gas usage: 425816Block Number: 11Block Time: Thu Oct 26 2017 17:29:41 GMT+0800 (CST)eth_newBlockFilter
eth_getFilterChanges
eth_getTransactionReceipt
eth_getCode
eth_uninstallFilter
eth_blockNumber
eth_sendTransactionTransaction: 0xc77b4f897c7ebcd27022c0b677589b6a3611384f5734660ec422cde74f0bec24Gas usage: 48908Block Number: 12Block Time: Thu Oct 26 2017 17:29:41 GMT+0800 (CST)eth_getTransactionReceipt
eth_blockNumber
eth_sendTransactionTransaction: 0xbc11d4af9475b481271d824c3ba492d7eb23a204608c3da790b77cd8509d518eGas usage: 29062Block Number: 13Block Time: Thu Oct 26 2017 17:29:41 GMT+0800 (CST)eth_getTransactionReceipt
eth_blockNumber
eth_sendTransactionTransaction: 0x64e35489fcad832bfce85d305726922c2c2a97dcb897ffbfc4a69b0649fc7244Gas usage: 36064Block Number: 14Block Time: Thu Oct 26 2017 17:29:41 GMT+0800 (CST)eth_getTransactionReceipt复制代码

创建用户界面连接智能合约

安装web3

xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ npm install -g web3
npm WARN deprecated fs-promise@2.0.3: Use mz or fs-extra^3.0 with Promise Support
npm WARN deprecated tar.gz@1.0.7: ⚠️  WARNING ⚠️ tar.gz module has been deprecated and your application is vulnerable. Please use tar module instead: https://npmjs.com/tar
npm WARN deprecated minimatch@0.3.0: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue> scrypt@6.0.3 preinstall /usr/local/lib/node_modules/web3/node_modules/scrypt
> node node-scrypt-preinstall.js> scrypt@6.0.3 install /usr/local/lib/node_modules/web3/node_modules/scrypt
> node-gyp rebuildSOLINK_MODULE(target) Release/copied_files.nodeCC(target) Release/obj.target/scrypt_wrapper/src/util/memlimit.oCC(target) Release/obj.target/scrypt_wrapper/src/scryptwrapper/keyderivation.oCC(target) Release/obj.target/scrypt_wrapper/src/scryptwrapper/pickparams.oCC(target) Release/obj.target/scrypt_wrapper/src/scryptwrapper/hash.oLIBTOOL-STATIC Release/scrypt_wrapper.aCC(target) Release/obj.target/scrypt_lib/scrypt/scrypt-1.2.0/lib/crypto/crypto_scrypt.oCC(target) Release/obj.target/scrypt_lib/scrypt/scrypt-1.2.0/lib/crypto/crypto_scrypt_smix.oCC(target) Release/obj.target/scrypt_lib/scrypt/scrypt-1.2.0/libcperciva/util/warnp.oCC(target) Release/obj.target/scrypt_lib/scrypt/scrypt-1.2.0/libcperciva/alg/sha256.oCC(target) Release/obj.target/scrypt_lib/scrypt/scrypt-1.2.0/libcperciva/util/insecure_memzero.oCC(target) Release/obj.target/scrypt_lib/scrypt/scrypt-1.2.0/lib/scryptenc/scryptenc_cpuperf.oLIBTOOL-STATIC Release/scrypt_lib.aCXX(target) Release/obj.target/scrypt/src/node-boilerplate/scrypt_common.oCXX(target) Release/obj.target/scrypt/src/node-boilerplate/scrypt_params_async.oCXX(target) Release/obj.target/scrypt/src/node-boilerplate/scrypt_params_sync.oCXX(target) Release/obj.target/scrypt/src/node-boilerplate/scrypt_kdf_async.oCXX(target) Release/obj.target/scrypt/src/node-boilerplate/scrypt_kdf_sync.oCXX(target) Release/obj.target/scrypt/src/node-boilerplate/scrypt_kdf-verify_sync.oCXX(target) Release/obj.target/scrypt/src/node-boilerplate/scrypt_kdf-verify_async.oCXX(target) Release/obj.target/scrypt/src/node-boilerplate/scrypt_hash_sync.oCXX(target) Release/obj.target/scrypt/src/node-boilerplate/scrypt_hash_async.oCXX(target) Release/obj.target/scrypt/scrypt_node.oSOLINK_MODULE(target) Release/scrypt.node> sha3@1.2.0 install /usr/local/lib/node_modules/web3/node_modules/sha3
> node-gyp rebuildCXX(target) Release/obj.target/sha3/src/addon.o
../src/addon.cpp:59:36: warning: 'NewInstance' is deprecated [-Wdeprecated-declarations]info.GetReturnValue().Set(cons->NewInstance(argc, argv));^
/Users/xiaoyu/.node-gyp/8.5.0/include/node/v8.h:3787:3: note: 'NewInstance' has been explicitly marked deprecated hereV8_DEPRECATED("Use maybe version",^
/Users/xiaoyu/.node-gyp/8.5.0/include/node/v8config.h:332:29: note: expanded from macro 'V8_DEPRECATED'declarator __attribute__((deprecated))^
1 warning generated.CXX(target) Release/obj.target/sha3/src/displayIntermediateValues.oCXX(target) Release/obj.target/sha3/src/KeccakF-1600-reference.oCXX(target) Release/obj.target/sha3/src/KeccakNISTInterface.oCXX(target) Release/obj.target/sha3/src/KeccakSponge.oSOLINK_MODULE(target) Release/sha3.node> websocket@1.0.24 install /usr/local/lib/node_modules/web3/node_modules/websocket
> (node-gyp rebuild 2> builderror.log) || (exit 0)CXX(target) Release/obj.target/bufferutil/src/bufferutil.oSOLINK_MODULE(target) Release/bufferutil.nodeCXX(target) Release/obj.target/validation/src/validation.oSOLINK_MODULE(target) Release/validation.node
+ web3@1.0.0-beta.24
added 289 packages in 68.85s复制代码

打开文件/src/js/app.js

下面的代码展示了如何调用web3,调用合约的方法，以及绑定数据到UI

App = {web3Provider: null,contracts: {},init: function() {// Load pets.$.getJSON('../pets.json', function(data) {var petsRow = $('#petsRow');var petTemplate = $('#petTemplate');for (i = 0; i < data.length; i ++) {petTemplate.find('.panel-title').text(data[i].name);petTemplate.find('img').attr('src', data[i].picture);petTemplate.find('.pet-breed').text(data[i].breed);petTemplate.find('.pet-age').text(data[i].age);petTemplate.find('.pet-location').text(data[i].location);petTemplate.find('.btn-adopt').attr('data-id', data[i].id);petsRow.append(petTemplate.html());}});return App.initWeb3();},initWeb3: function() {// web3入口if (typeof web3 !== 'undefined') {App.web3Provider = web3.currentProvider;} else {// 测试网络App.web3Provider = new Web3.providers.HttpProvider('http://localhost:8588'); //这里是我指定的端口88}web3 = new Web3(App.web3Provider);return App.initContract();},initContract: function() {//加载Adoption.json$.getJSON('Adoption.json', function(data) {// 智能合约实例化var AdoptionArtifact = data;App.contracts.Adoption = TruffleContract(AdoptionArtifact);// 设置合约提供者App.contracts.Adoption.setProvider(App.web3Provider);// 检索操作return App.markAdopted();});return App.bindEvents();},bindEvents: function() {$(document).on('click', '.btn-adopt', App.handleAdopt);},markAdopted: function(adopters, account) {//实例var adoptionInstance;App.contracts.Adoption.deployed().then(function(instance) {adoptionInstance = instance;return adoptionInstance.getAdopters.call();}).then(function(adopters) {for (i = 0; i < adopters.length; i++) {if (adopters[i] !== '0x0000000000000000000000000000000000000000') {$('.panel-pet').eq(i).find('button').text('Success').attr('disabled', true);}}}).catch(function(err) {console.log(err.message);});},handleAdopt: function() {event.preventDefault();var petId = parseInt($(event.target).data('id'));var adoptionInstance;web3.eth.getAccounts(function(error, accounts) {if (error) {console.log(error);}var account = accounts[0];App.contracts.Adoption.deployed().then(function(instance) {adoptionInstance = instance;// Execute adopt as a transaction by sending accountreturn adoptionInstance.adopt(petId, {from: account});}).then(function(result) {return App.markAdopted();}).catch(function(err) {console.log(err.message);});});}};$(function() {$(window).load(function() {App.init();});
});复制代码

在浏览器中运行dapp

安装MetaMask到浏览器

• 安装扩展程序
• 创建测试网络账户
• 从其他测试网络钱包转移eth

安装和配置lite-server

打开bs-config.json文件

{"server": {"baseDir": ["./src", "./build/contracts"]}
}复制代码

打开package.json文件，下面配置了lite-server的部分

"scripts": {"dev": "lite-server","test": "echo \"Error: no test specified\" && exit 1"
},复制代码

当运行npm run dev的时候，就会启动lite-server

运行Dapp

❖  ~/solidity/pet-shop-tutorial [17:35:33]
xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ npm run dev> pet-shop@1.0.0 dev /Users/xiaoyu/solidity/pet-shop-tutorial
> lite-serversh: lite-server: command not found
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! pet-shop@1.0.0 dev: `lite-server`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the pet-shop@1.0.0 dev script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/xiaoyu/.npm/_logs/2017-10-26T10_20_42_191Z-debug.log复制代码

报错了。。。。

xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ npm install -g lite-server
npm WARN deprecated express@2.5.11: express 2.x series is deprecated
npm WARN deprecated connect@1.9.2: connect 1.x series is deprecated
/usr/local/bin/lite-server -> /usr/local/lib/node_modules/lite-server/bin/lite-server> fsevents@1.1.2 install /usr/local/lib/node_modules/lite-server/node_modules/fsevents
> node install[fsevents] Success: "/usr/local/lib/node_modules/lite-server/node_modules/fsevents/lib/binding/Release/node-v57-darwin-x64/fse.node" already installed
Pass --update-binary to reinstall or --build-from-source to recompile
+ lite-server@2.3.0
added 417 packages in 499.895s
❖  ~/solidity/pet-shop-tutorial [18:30:10]
xiaoyu@LIXIAOYUdeMacBook-Pro.com➤ npm run dev               > pet-shop@1.0.0 dev /Users/xiaoyu/solidity/pet-shop-tutorial
> lite-server** browser-sync config **
{ injectChanges: false,files: [ './**/*.{html,htm,css,js}' ],watchOptions: { ignored: 'node_modules' },server: { baseDir: [ './src', './build/contracts' ],middleware: [ [Function], [Function] ] } }
[Browsersync] Access URLs:-------------------------------------Local: http://localhost:3000External: http://10.0.178.198:3000-------------------------------------UI: http://localhost:3001UI External: http://10.0.178.198:3001-------------------------------------
[Browsersync] Serving files from: ./src
[Browsersync] Serving files from: ./build/contracts
[Browsersync] Watching files...
17.10.26 18:31:20 200 GET /index.html
17.10.26 18:31:20 200 GET /css/bootstrap.min.css
17.10.26 18:31:21 200 GET /js/bootstrap.min.js
17.10.26 18:31:21 200 GET /js/web3.min.js
17.10.26 18:31:21 200 GET /js/app.js
17.10.26 18:31:21 200 GET /js/truffle-contract.js
17.10.26 18:31:24 200 GET /pets.json
17.10.26 18:31:24 200 GET /Adoption.json
17.10.26 18:31:24 200 GET /images/french-bulldog.jpeg
17.10.26 18:31:24 200 GET /images/boxer.jpeg
17.10.26 18:31:24 200 GET /images/scottish-terrier.jpeg
17.10.26 18:31:24 200 GET /images/golden-retriever.jpeg
17.10.26 18:31:24 404 GET /favicon.ico复制代码

然后会自动打开浏览器,http://localhost:3000/

点击adopt按钮，会跳出提示，支付合约费用，完成调用。

总结

Truffle能完成智能合约的整套流程。

Truffle Box 提供了现成的项目，可以快速上手。

Truffle官网文档够详细，点个赞。

参考资料

• truffleframework.com/docs/gettin…
• truffleframework.com/tutorials/p…
• github.com/ethereumjs/…
• truffleframework.com/boxes/
• github.com/trufflesuit…
• github.com/ethereum/we…
• metamask.io/