ido代币预售流动性挖矿系统模型开发语言编写技术

以下是一个的编程代码示例，用Solidity语言编写。

struct PoolInfo {
    IERC20 lpToken;           
    INFT nftToken;             
    uint256 nftId;             
    uint256 nftRate;           
    uint256 lastRewardBlock;  
    uint256 accRewardPerShare; 
}

PoolInfo[] public poolInfo;
mapping (uint256 => mapping (address => UserInfo)) public userInfo;

IERC20 public rewardToken;
uint256 public rewardPerBlock;

constructor(
    IERC20 _rewardToken,
    uint256 _rewardPerBlock
) public {
    rewardToken = _rewardToken;
    rewardPerBlock = _rewardPerBlock;
}

function addPool(
    IERC20 _lpToken,
    INFT _nftToken,
    uint256 _nftId,
    uint256 _nftRate,
    bool _withUpdate
) public {
    if (_withUpdate) {
        massUpdatePools();
    }
    poolInfo.push(PoolInfo({
        lpToken: _lpToken,
        nftToken: _nftToken,
        nftId: _nftId,
        nftRate: _nftRate,
        lastRewardBlock: block.number,
        accRewardPerShare: 0
    }));
}

function updatePool(uint256 _pid) public {
    PoolInfo storage pool = poolInfo[_pid];
    if (block.number <= pool.lastRewardBlock) {
        return;
    }
    uint256 lpSupply = pool.lpToken.balanceOf(address(this));
    if (lpSupply == 0) {
        pool.lastRewardBlock = block.number;
        return;
    }
    uint256 blocks = block.number - pool.lastRewardBlock;
    uint256 reward = blocks * rewardPerBlock;
    pool.accRewardPerShare += reward * 1e12 / lpSupply;
    pool.lastRewardBlock = block.number;
}

function massUpdatePools() public {
    uint256 length = poolInfo.length;
    for (uint256 pid = 0; pid < length; ++pid) {
        updatePool(pid);
    }
}

function deposit(uint256 _pid, uint256 _amount) public {
    PoolInfo storage pool = poolInfo[_pid];
    UserInfo storage user = userInfo[_pid][msg.sender];
    updatePool(_pid);
    if (user.amount > 0) {
        uint256 pending = user.amount * pool.accRewardPerShare / 1e12 - user.rewardDebt;
        rewardToken.transfer(msg.sender, pending);
    }
    if (_amount > 0) {
        pool.lpToken.transferFrom(msg.sender, address(this), _amount);
        user.amount += _amount;
        pool.nftToken.transferFrom(msg.sender, address(this), pool.nftId);