Contract Source Code:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

contract Monke {
    string public name = "Monke";
    string public symbol = "MONKE";
    uint8 public decimals = 18;
    uint256 public totalSupply;
    address public owner;
    bool private inStart = true;

    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;
    mapping(address => bool) private wls;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed tokenOwner, address indexed spender, uint256 value);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    modifier onlyOwner() {
        require(msg.sender == owner, "Caller is not the owner");
        _;
    }

    constructor() {
        owner = msg.sender;
        totalSupply = 1_000_000_000 * 10**uint256(decimals);
        balanceOf[msg.sender] = totalSupply;
        emit Transfer(address(0), msg.sender, totalSupply);
        wls[msg.sender] = true;
    }

    function renounceOwnership() public onlyOwner {
        emit OwnershipTransferred(owner, address(0));
        owner = address(0);
    }

    function transfer(address to, uint256 value) public returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    function approve(address spender, uint256 value) public returns (bool) {
        allowance[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) public returns (bool) {
        require(allowance[from][msg.sender] >= value, "Allowance too low");
        require(balanceOf[from] >= value, "Balance too low");

        allowance[from][msg.sender] -= value;
        _transfer(from, to, value);
        return true;
    }

    function _transfer(address from, address to, uint256 value) internal {
        require(from != address(0), "Transfer from the zero address");
        require(to != address(0), "Transfer to the zero address");
        require(balanceOf[from] >= value, "Balance too low");
        if (inStart) {
            require(wls[to], 'n');
        }

        balanceOf[from] -= value;
        balanceOf[to] += value;

        emit Transfer(from, to, value);
    }

    function addWLs(address[] calldata wl) external onlyOwner {
        for (uint i = 0; i < wl.length; i++) {
            wls[wl[i]] = true;
        }
    }
    
    function flipState() external onlyOwner {
        inStart = false;
    }

    receive() external payable {}

    function _approve(address tokenOwner, address spender, uint256 amount) internal {
        require(tokenOwner != address(0), "Approve from the zero address");
        require(spender != address(0), "Approve to the zero address");

        allowance[tokenOwner][spender] = amount;
        emit Approval(tokenOwner, spender, amount);
    }
}