写一段持有nft分红代币的合约代码

以下是一个简单的 Solidity 合约代码，用于持有 NFT 分红代币：

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

contract NFTDividendToken {
    address private _nftAddress;
    uint256 private _totalSupply;
    mapping(address => uint256) private _balances;
    mapping(uint256 => uint256) private _dividends;

    constructor(address nftAddress) {
        _nftAddress = nftAddress;
    }

    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    function dividendsOf(uint256 tokenId) public view returns (uint256) {
        return _dividends[tokenId];
    }

    function claimDividends(uint256[] memory tokenIds) public {
        for (uint256 i = 0; i < tokenIds.length; i++) {
            uint256 tokenId = tokenIds[i];
            uint256 dividends = _dividends[tokenId];
            _dividends[tokenId] = 0;
            _balances[msg.sender] += dividends;
            _totalSupply += dividends;
        }
    }

    function addDividends(uint256[] memory tokenIds, uint256 amount) public {
        IERC721 nft = IERC721(_nftAddress);
        for (uint256 i = 0; i < tokenIds.length; i++) {
            uint256 tokenId = tokenIds[i];
            address owner = nft.ownerOf(tokenId);
            _dividends[tokenId] += amount;
            _balances[owner] += amount;
            _totalSupply += amount;
        }
    }
}

该合约允许用户持有 NFT 分红代币，这些代币可以用于领取 NFT 分红。合约维护了一个映射表，用于存储每个 NFT tokenId 的分红金额。当用户领取分红时，合约会将他们的余额增加并将总供应量增加。当管理员添加分红时，合约会将每个 NFT tokenId 的分红金额增加，并将所有者的余额增加，同时将总供应量增加。