August 2018
Beginner to intermediate
153 pages
2h 15m
English
Content preview from Build Your First Ethereum DApp
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Chapter 4: Whitelisting & Testing a Story DAO
In part 3 of this tutorial series on building DApps with Ethereum, we built and deployed our token to the Ethereum testnet Rinkeby. In this part, we’ll start writing the Story DAO code.
We’ll use the conditions laid out in the first chapter to guide us.
Contract Outline
Let’s create a new contract, StoryDao.sol, with this skeleton:
pragma solidity ^0.4.24; import "../node_modules/openzeppelin-solidity/contracts/math/SafeMath.sol"; import "../node_modules/openzeppelin-solidity/contracts/ownership/Ownable.sol"; contract StoryDao is Ownable { using SafeMath for uint256; mapping(address => bool) whitelist; uint256 public whitelistedNumber = 0; mapping(address => bool) blacklist; event Whitelisted(address ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.