建立标准的极客币（GKT）

1.创建项目

cd /Users/chenxiao/Desktop/GKT 
truffle unbox react

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2.安装zeppelin-solidity

npm install zeppelin-solidity

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3.新建极客币合约

pragma solidity ^0.4.4;
import "zeppelin-solidity/contracts/token/ERC20/StandardToken.sol";

contract GeekToken is StandardToken {
  string public name = "GeekToken";
  string public symbol = "GKT";
  uint8 public decimals = 4;
  uint256 public INITIAL_SUPPLY = 10000;
  uint256 totalSupply_;
  function GeekToken() public {
    totalSupply_ = INITIAL_SUPPLY;
    balances[msg.sender] = INITIAL_SUPPLY;
  }
}

4.配置

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

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

const path = require("path");

module.exports = {
  // See 
  // to customize your Truffle configuration!
  // contracts_build_directory: path.join(__dirname, "client/src/contracts")

  migrations_directory: "./migrations",
  networks: {
    development: {
      host: "localhost",
      port: 8545,
      network_id: "*" // 匹配任何network id
    }
  },
  rinkeby: {
    host: "localhost", // Connect to geth on the specified
    port: 8545,
    network_id: "*",
  }
};

5.编译与部署

cd /Users/chenxiao/Desktop/GKT 
truffle compile
truffle migrate

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6.合约验证

truffle console
//初始化
GeekToken.deployed().then(instance => contract = instance)
//实例一个合约变量
let contract
//查询总量
contract.balanceOf(web3.eth.coinbase)
//查询第二个账户币的持有量
contract.balanceOf(web3.eth.accounts[1])
//转币
contract.transfer(web3.eth.accounts[1], 5000)

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