ChanJuiHuang

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.4.24;

contract BasicToken {
  
  uint256 totalSupply_;
  mapping(address => uint256) balances;
  
  constructor(uint256 _initialSupply) public {
    totalSupply_ = _initialSupply;

ChanJuiHuang

// SPDX-License-Identifier: MIT
pragma solidity 0.8.16;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/*
  建立一個 Bank 銀行
  在 web3 世界人人都可以當銀行家！我們想開張一間去中心化金融中心，簡易小而美的銀行

  使用者可以將我們發行的 Staking Token (ERC20代幣)存入銀行

ChanJuiHuang

// SPDX-License-Identifier: MIT
pragma solidity 0.8.16;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/*
  建立一個 Bank 銀行
  在 web3 世界人人都可以當銀行家！我們想開張一間去中心化金融中心，簡易小而美的銀行

  使用者可以將我們發行的 Staking Token (ERC20代幣)存入銀行

ChanJuiHuang

// SPDX-License-Identifier: MIT

pragma solidity 0.8.16;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract RewardToken is ERC20 {
    constructor() ERC20("Reward Token", "RT") {
        _mint(msg.sender, 100 * 1e18);
    }

ChanJuiHuang

// SPDX-License-Identifier: MIT

pragma solidity 0.8.16;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract StakingToken is ERC20 {
    constructor() ERC20("Staking Token", "ST") {
      mint(msg.sender, 50000);
    }

ChanJuiHuang

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

contract XXXToken {
    string public name;
    string public symbol;
    uint256 public totalSupply;
    mapping(address => uint256) private balances;
    address owner;

ChanJuiHuang

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract XXXERC721 is ERC721 {
    using Counters for Counters.Counter;

    uint256 public mintPrice = 0.005 ether;

ChanJuiHuang

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract WoWToken is ERC20 {
    uint256 public _totalSupply = 10000;

    constructor() ERC20("WoWToken", "WOW") {
        _mint(msg.sender, _totalSupply);

ChanJuiHuang

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

contract WoWNFT is ERC721 {
    constructor() ERC721("WoWNFT", "WOW") {}

    function mint(uint256 tokenId) public {
        _safeMint(msg.sender, tokenId);

ChanJuiHuang

// SPDX-License-Identifier: MIT
pragma solidity >= 0.8.4;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract XDNFT is ERC721 {
    using Counters for Counters.Counter;

    uint256 totalSupply = 2;