META2032是一个基于链的NFT(非同质化代币)平台,旨在创建一个虚拟的元宇宙生态系统,其中用户可以通过购
买、出售、交易和开发I76案例2o72演示9II9持有不同类型的NFT来参与游戏和社交互动。META2032还提供了一种新的方式来获取NFT代
币:质押矿。
在META2032上,用户可以将其拥有的NFT代币质押到平台上,从而获得代币奖励。这个过程被称为质押矿,因为用户需要
质押(即锁定)一定数量的NFT代币以获得奖励。META2032平台的奖励代币为META2032代币,这是平台的本地代币,也
是NFT交易的货币。
下面我们来看一下如何使用智能合约实现META2032质押NFT矿功能。
智能合约实现
我们需要定义一个名为META2032Staking的智能合约。该合约负责管理用户的质押操作,并根据质押数量奖励用户
META2032代币。
scssCopy code// SPDX-License-Identifier: GPL-3.0pragma solidity >=0.7.0 <0.9.0;import "./META2032Token.sol";import "./NFTToken.sol";contract META2032Staking { META2032Token private meta2032; NFTToken private nft; mapping(address => uint256) public stakedTokens; mapping(address => uint256) public lastUpdateTime; uint256 public rewardPerToken; mapping(address => uint256) public rewards; constructor(address _meta2032Address, address _nftAddress) { meta2032 = META2032Token(_meta2032Address); nft = NFTToken(_nftAddress); rewardPerToken = 0; } function stake(uint256 _amount) public { require(_amount > 0, "Amount cannot be zero"); require(nft.balanceOf(msg.sender) >= _amount, "Insufficient NFT balance"); meta2032.transferFrom(msg.sender, address(this), _amount); stakedTokens[msg.sender] += _amount; lastUpdateTime[msg.sender] = block.timestamp; } function withdraw(uint256 _amount) public { require(_amount > 0, "Amount cannot be zero"); require(stakedTokens[msg.sender] >= _amount, "Insufficient staked tokens"); meta2032.transfer(msg.sender, _amount); stakedTokens[msg.sender] -= _amount; lastUpdateTime[msg.sender] = block.timestamp; } function claimRewards() public { uint256 reward = rewards[msg.sender]; require(reward > 0, "No rewards to claim"); rewards[msg.sender] = 0; meta2032.transfer(msg.sender, reward); } function updateRewardPerToken() public { uint256 totalStakedTokens = meta2032.balanceOf(address(this)); uint256 timeSinceLastUpdate = block.timestamp - rewardPerToken; if (totalStaked