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。除此之外,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
首先,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