Super Rare超級稀有系統DAPP開發丨Solidity程式碼示例

Super Rare超級稀有質押挖礦是一種基於區塊鏈的挖礦和質押合約，旨在讓使用者透過質押Super Rare代幣來賺取獎勵。

在本文中，我們將介紹如何使用Solidity編寫一個簡單的Super Rare超級稀有質押挖礦合約，並演示它在以太坊區塊鏈上

執行的基本步驟。

首先，我們需要定義我們的合約。合約應該包括以下資訊：

Super Rare代幣地址

挖礦獎勵的總量和每塊的獎勵數量

最小質押金額和質押期限

下面是一個簡單的Solidity程式碼示例：

pragma solidity ^0.8.0;

interface IERC20 {

    function approve(address spender, uint256 amount) external returns (bool);

    function transfer(address to, uint256 amount) external returns (bool); 

    function balanceOf(address account) external view returns (uint256);

}

contract SuperRareStaking {

    address public owner;

    

    address public srAddress;

    uint256 public poolSize;

    

    uint256 public miningReward;

    uint256 public miningStep;

    

    uint256 public startDate;

    uint256 public endDate;

    

    uint256 public minimumStake;

    

    mapping(address => uint256) public stakedAmount;

    mapping(address => uint256) public lastClaim;

    

    event Staked(address indexed user, uint256 amount);

    event Withdrawn(address indexed user, uint256 amount);

    event RewardPaid(address indexed user, uint256 reward);

    constructor(

        address _srAddr,

        uint256 _poolSize,

        uint256 _rewardAmt,

        uint256 _miningStepAmt,

        uint256 _stDate,

        uint256 _enDate,

        uint256 _minStake

    ) {

        owner = msg.sender;

        srAddress = _srAddr;

        poolSize = _poolSize;

        miningReward = _rewardAmt;

        miningStep = _miningStepAmt;

        startDate = _stDate;

        endDate = _enDate;

        minimumStake = _minStake;

        

        IERC20(_srAddr).approve(address(this), _poolSize);

    }