以太坊-创建自己的数字货币(仅供学习使用)

• 准备

  • truffle：

    最流行的以太坊开发框架 | 官网

      //安装 
      npm install -g truffle
    

    注：如果出现权限不够，前面加sudo即可

  • openzeppelin-solidity

    在你编写智能合约时，安全检查是必不可少的。
    很多时候如果发行代币或者Dapp应用，需要遵循ERC20或者ERC721标准。
    还有一些其他的智能合约等等，这个库帮你将这些都实现了。
    你只要继承自它，就能以最快的速度去开发，不用再重复造轮子。

• 初始化项目

//SCC为你创建项目的根目录名称
mkdir SCC && cd SCC && truffle init

//添加openzeppelin-solidity库
npm init -y
npm install -E openzeppelin-solidity

• 添加智能合约

在contracts目录下，创建名为SchoolToken.sol的智能合约，代码如下

pragma solidity ^0.4.24;
//导入需要继承的合约
import "zeppelin-solidity/contracts/token/ERC20/StandardToken.sol";
//继承合约StandardToken
contract SchoolToken is StandardToken {
    //代币全程，类比bitcoin
    string public name = 'SchoolToken';
    //代币简称, 类比BTC
    string public symbol = 'SCT';
    //最小分割单位
    uint public decimals = 2;
    //发行总量
    uint public initial_supply = 12000;
    //构造函数
    constructor() public{
        totalSupply_ = initial_supply;
        balances[msg.sender] = initial_supply;
    }

}

• 部署配置

在/migrations目录下，用下述内容创建文件2_deploy_SchoolToken.js ，内容如下：

var SchoolToken = artifacts.require("./SchoolToken.sol");

module.exports = function(deployer) {
    deployer.deploy(SchoolToken);
};

• 编译和部署

//执行以下命令，启动测试环境
truffle develop

//执行后如果出现以下输出表示启动成功，进入console交互界面
Truffle Develop started at http://127.0.0.1:9545/

Accounts:
(0) 0x627306090abab3a6e1400e9345bc60c78a8bef57
(1) 0xf17f52151ebef6c7334fad080c5704d77216b732
(2) 0xc5fdf4076b8f3a5357c5e395ab970b5b54098fef
(3) 0x821aea9a577a9b44299b9c15c88cf3087f3b5544
(4) 0x0d1d4e623d10f9fba5db95830f7d3839406c6af2
(5) 0x2932b7a2355d6fecc4b5c0b6bd44cc31df247a2e
(6) 0x2191ef87e392377ec08e7c08eb105ef5448eced5
(7) 0x0f4f2ac550a1b4e2280d04c21cea7ebd822934b5
(8) 0x6330a553fc93768f612722bb8c2ec78ac90b3bbc
(9) 0x5aeda56215b167893e80b4fe645ba6d5bab767de

Private Keys:
(0) c87509a1c067bbde78beb793e6fa76530b6382a4c0241e5e4a9ec0a0f44dc0d3
(1) ae6ae8e5ccbfb04590405997ee2d52d2b330726137b875053c36d94e974d162f
(2) 0dbbe8e4ae425a6d2687f1a7e3ba17bc98c673636790f1b8ad91193c05875ef1
(3) c88b703fb08cbea894b6aeff5a544fb92e78a18e19814cd85da83b71f772aa6c
(4) 388c684f0ba1ef5017716adb5d21a053ea8e90277d0868337519f97bede61418
(5) 659cbb0e2411a44db63778987b1e22153c086a95eb6b18bdf89de078917abc63
(6) 82d052c865f5763aad42add438569276c00d3d88a2d062d36b2bae914d58b8c8
(7) aa3680d5d48a8283413f7a108367c7299ca73f553735860a87b08f39395618b7
(8) 0f62d96d6675f32685bbdb8ac13cda7c23436f63efbb9d07700d8669ff12b7c4
(9) 8d5366123cb560bb606379f90a0bfd4769eecc0557f1b362dcae9012b548b1e5

Mnemonic: candy maple cake sugar pudding cream honey rich smooth crumble sweet treat

⚠️  Important ⚠️  : This mnemonic was created for you by Truffle. It is not secure.
Ensure you do not use it on production blockchains, or else you risk losing funds.

truffle(develop)>

执行以下命令编译，
compile

//输出以下信息说明编译成功，成功后你会在项目目录下看到如下图的一系列编译出的json文件
Compiling ./contracts/Migrations.sol...
Compiling ./contracts/SchoolToken.sol...
Compiling zeppelin-solidity/contracts/math/SafeMath.sol...
Compiling zeppelin-solidity/contracts/token/ERC20/BasicToken.sol...
Compiling zeppelin-solidity/contracts/token/ERC20/ERC20.sol...
Compiling zeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol...
Compiling zeppelin-solidity/contracts/token/ERC20/StandardToken.sol...
Writing artifacts to ./build/contracts

truffle(develop)>

执行以下命令部署
migrate

//输出以下信息说明部署成功
Using network 'develop'.

Running migration: 1_initial_migration.js
  Deploying Migrations...
  ... 0x7448f8078875866f462fb322bb3e93db89ce190d301e77ba56f0db88010eb5f2
  Migrations: 0x8cdaf0cd259887258bc13a92c0a6da92698644c0
Saving successful migration to network...
  ... 0xd7bc86d31bee32fa3988f1c1eabce403a1b5d570340a3a9cdba53a472ee8c956
Saving artifacts...
Running migration: 2_deploy_schooltoken.js
  Deploying SchoolToken...
  ... 0x5eb39efb5e4d4e819c509c8bf83c738c2ac41bb472ea6569756d2272c3a9ff1a
  SchoolToken: 0x345ca3e014aaf5dca488057592ee47305d9b3e10
Saving successful migration to network...
  ... 0xf36163615f41ef7ed8f4a8f192149a0bf633fe1a2398ce001bf44c43dc7bdda0
Saving artifacts...
truffle(develop)>

下面你就可以通过testrpc 调用你自己的合约查看相关信息