OH Week2 Overview

Solidity 全解析

這邊使用的教材是我自己整理的 All In One Solidity，內容極多今天應該講不完！

資源幾乎來自我蒐集的各種高手撰寫的智能合約、官方文件，輔以 Kordan 上課講的一些內容，最後加上我的補充見解而編成的。

Homework

2022/1/10

HW1 找到這個合約錯誤並且修正它

contract WalletLibrary is WalletEvents {
  ...
  // METHODS
  ...
  // constructor is given number of sigs required to do protected
  // "onlymanyowners" transactions as well as the selection of addresses
  // capable of confirming them
  function initMultiowned(address[] _owners, uint _required) {
    m_numOwners = _owners.length + 1;
    m_owners[1] = uint(msg.sender);
    m_ownerIndex[uint(msg.sender)] = 1;
    for (uint i = 0; i < _owners.length; ++i)
    {
      m_owners[2 + i] = uint(_owners[i]);
      m_ownerIndex[uint(_owners[i])] = 2 + i;
    }
    m_required = _required;
  }
  ...
  // constructor - just pass on the owner array to multiowned and
  // the limit to daylimit
  function initWallet(address[] _owners, uint _required, uint _daylimit) {
    initDaylimit(_daylimit);
    initMultiowned(_owners, _required);
  }
}

HW2 描述智能合約如何更新、凍結、作廢，並且用一段範例程式來說明機制

HW3 (Optional) 寫小程式讀取 USDT 交易內容

HW4 (Optional) 設計多人管理的智能合約保險箱

2022/1/12

HW1 寫出可以更新的智能合約，如：Uniswap v1 -> v2 -> v3

HW2 (Optional) 代幣發行 Token Sale

• 投入 USDT 換得你的代幣

2022/1/14

HW1使用智能合約設計群眾募資網站

• 荷蘭式拍賣

• 白名單機制

• 升級到 > v0.8

• 參考：https://github.com/0xTDF/ERC20-Token-and-Sale

  • https://github.com/Krypto-Camp/ERC20-Token-and-Sale

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Reference and Some Resources

論壇、群組或者是學習資源

Solidity

• https://github.com/HashLips/solidity_basics

• https://github.com/ConsenSys/smart-contract-best-practices

• https://github.com/willitscale/learning-solidity

• https://consensys.github.io/smart-contract-best-practices/tokens/

• https://solidity-by-example.org/

• https://www.youtube.com/watch?v=pqxNmdwEHio&list=PLS5SEs8ZftgVnWHv2_mkvJjn5HBOkde3g

• https://cryptozombies.io/en/course/

• https://a16z.com/crypto-startup-school/

ERC vs. EIP

• https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md

• https://ithelp.ithome.com.tw/articles/10266115