LP智慧合約質押挖礦系統元件開發丨DAPP丨Defi丨LP丨IDO

隨著區塊鏈技術的發展，LP（流動性提供者）挖礦成為了Defi（去中心化金融）生態中一個重要的組成部分。LP挖礦是指

將代幣對的流動性提供到去中心化交易所，同時可以獲得代幣獎勵，同時還可以獲得交易手續費的分紅。

本文將介紹如何開發一個LP智慧合約質押挖礦的Dapp，使用者可以將代幣對存入智慧合約中，獲取代幣獎勵和交易手續費分紅。

一、智慧合約設計

首先，我們需要定義儲存變數：

typescript

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uint256 public totalSupply;  // 總供應量

mapping(address => uint256) public balances;  // 使用者餘額

mapping(address => mapping(address => uint256)) public allowance;  // 授權餘額

uint256 public constant MINIMUM_LIQUIDITY = 10**3;  // 最小流動性

address public factory;  // 工廠合約地址

address public token0;  // 代幣0地址

address public token1;  // 代幣1地址

uint256 private unlocked = 1;  // 加鎖標記

接下來，定義事件：

csharp

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event Mint(address indexed sender, uint256 amount0, uint256 amount1);

event Burn(address indexed sender, uint256 amount0, uint256 amount1, address indexed to);

event Swap(address indexed sender, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256

 amount1Out, address indexed to);

event Sync(uint256 reserve0, uint256 reserve1);

定義初始化函式：

javascript

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constructor() {

    factory = msg.sender;

}

定義鎖定函式：

javascript

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modifier lock() {

    require(unlocked == 1, 'LOCKED');

    unlocked = 0;

    _;

    unlocked = 1;

}

定義計算池子中代幣0的比例函式：

scss

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function getReserves() public view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast) {

    blockTimestampLast = uint32(block.timestamp % 2 ** 32);

    reserve0 = _reserve0;

    reserve1 = _reserve1;

}

function price(address token) public view returns (uint256) {

    (uint112 reserve0, uint112 reserve1, ) = getReserves();

    if (token == token0) {

        return reserve1 * 1e18 / reserve0;

    } else {

        return reserve0 * 1e18 / reserve1;

    }

}

定義質押函式：

scss

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function mint(address to) external lock payable {

    uint256 _totalSupply = totalSupply;

    uint256 liquidity;

    uint256 balance0 = IERC20(token0).balanceOf(address(this));

    uint256 balance1 = IERC20(token1).balanceOf(address(this));

    uint256 amount0 = balance0 - _reserve0;

    uint256 amount1 = balance1 - _reserve1;

    if (_totalSupply == 0) {

        liquidity = sqrt(amount0 * amount