Max Wallet: Mecanismo antiballena para tu token

// SPDX-License-Identifier: MIT

pragma solidity 0.8.13;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract MyToken is ERC20
{ 
    uint public maxWalletAmount;
    address CREATOR;

    constructor () ERC20("My Token", "TKN")
    {
        CREATOR = msg.sender;
        _mint(msg.sender, 1000000 ether);
        maxWalletAmount = 1000 ether;
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint amount
    ) internal virtual override(ERC20)
    {
        require(to == CREATOR || balanceOf(to) + amount <= maxWalletAmount, "Max Wallet Limit Exceeds!");

        super._beforeTokenTransfer(from, to, amount);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.13;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";


interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router02 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
}

contract MyToken is ERC20, Ownable
{ 
    uint public maxWalletAmount;
    mapping(address => bool) public isMaxTxExempt;
    address public pair;

    constructor () ERC20("My Token", "TKN")
    {
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0xa5E0829CaCEd8fFDD4De3c43696c57F7D7A678ff);
        pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());

        isMaxTxExempt[msg.sender] = true;
        isMaxTxExempt[pair] = true;

        _mint(msg.sender, 1000000 ether);

        setMaxWalletPercentage(100);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint amount
    ) internal virtual override(ERC20)
    {
        require(isMaxTxExempt[to] || balanceOf(to) + amount <= maxWalletAmount, "Max Wallet Limit Exceeds!");

        super._beforeTokenTransfer(from, to, amount);
    }

    function setMaxWalletPercentage(uint256 percentage) public onlyOwner {
        maxWalletAmount = (totalSupply() * percentage) / 10000;
    }

    function setMaxTxExempt(address account, bool value) external onlyOwner {
        isMaxTxExempt[account] = value;
    }
}