DeFi单双币流动性质押挖矿系统模式开发（源码案例详情）规则

通过将PI和USDT两种货币同时质押到指定的矿池中，双币质押挖矿是一种新型的数字货币挖矿方式，参与挖矿活动，获得相应的收益。

简单的代码示例，可以帮助您理解PI双币质押挖矿的实现方式：

ini复制代码scssCopy codepragma solidity ^0.8.0;

struct Staker {

uint256 piAmount;

uint256 usdtAmount;

uint256 lastUpdateTime;

uint256 rewardEarned;

} mapping(address => Staker) public stakers;

uint256 public totalStakedPi;

uint256 public totalStakedUsdt;

uint256 public rewardRate = 10; // 每日收益率

constructor(address _piToken, address _usdtToken) {

piToken = IERC20(_piToken);

usdtToken = IERC20(_usdtToken);

}

function stake(uint256 _piAmount, uint256 _usdtAmount) external {

require(_piAmount > 0 || _usdtAmount > 0, "Invalid amount");

updateReward(msg.sender);

function claimReward() external {

updateReward(msg.sender);

uint256 reward = stakers[msg.sender].rewardEarned;
stakers[msg.sender].rewardEarned = 0;
piToken.transfer(msg.sender, reward);

}

function updateReward(address _account) internal {

uint256 rewardPerToken = getRewardPerToken();

stakers[_account].rewardEarned += getRewardEarned(_account, rewardPerToken);

stakers[_account].lastUpdateTime = block.timestamp;【更全面的开发源码搭建可V、TG我昵称】

}

function getRewardPerToken() internal view returns (uint256) {

uint256 totalStaked = totalStakedPi + totalStakedUsdt;

if (totalStaked

if (_piAmount > 0) {
    piToken.transferFrom(msg.sender, address(this), _piAmount);
    stakers[msg.sender].piAmount += _piAmount;
    totalStakedPi += _piAmount;
}

if (_usdtAmount > 0) {
    usdtToken.transferFrom(msg.sender, address(this), _usdtAmount);
    stakers[msg.sender].usdtAmount += _usdtAmount;
    totalStakedUsdt += _usdtAmount;
}

}