// SPDX-License-Identifier: MIT
/*
 

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                                   88    88           
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a8P_____88 ""     `Y8 88P'   "Y8   88    88P'    "8a  
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"8b,   ,aa 88,    ,88 88           88,   88       88  
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Website: https://www.flateartherc.xyz/
Telegram: https://t.me/FlatEthErc
X: https://x.com/FlatEthErc20/


                                         88           
                                   ,d    88           
                                   88    88           
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a8P_____88 ""     `Y8 88P'   "Y8   88    88P'    "8a  
8PP""""""" ,adPPPPP88 88           88    88       88  
"8b,   ,aa 88,    ,88 88           88,   88       88  
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*/
pragma solidity 0.8.18;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        return c;
    }

}

contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor () {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    function owner() public view returns (address) {
        return _owner;
    }

    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

}

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router02 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
}

contract FLAT is Context , IERC20, Ownable {
    using SafeMath for uint256;

    string private constant _name = unicode"Flat Earth";
    string private constant _symbol = unicode"FLAT";
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => bool) private bots;
    address payable private _taxWallet;

    uint256 private _BuyFee = 30;
    uint256 private _SellFee = 30;

    uint8 private constant _decimals = 18;
    uint256 private constant _sTotal = 1_000_000_000 * 10**_decimals;
    uint256 public _maxTxAmount = 2 * (_sTotal/100);
    uint256 public _maxWalletSize = 2 * (_sTotal/100);
    uint256 public _taxSwapThreshold = 4 * (_sTotal/1000);

    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;
    bool private tradingOpen = true;
    bool private inSwap = false;
    bool private swapEnabled = true;

    event MaxTxAmountUpdated(uint _maxTxAmount);
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor () {
        _balances[_msgSender()] = _sTotal;

        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
        
        _taxWallet = payable(_msgSender());
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_taxWallet] = true;

        emit Transfer(address(0), _msgSender(), _sTotal);
    }

    function name() public pure returns (string memory) {
        return _name;
    }

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

    function decimals() public pure returns (uint8) {
        return _decimals;
    }

    function totalSupply() public pure override returns (uint256) {
        return _sTotal;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _transfer(address from, address to, uint256 amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        uint256 taxAmount=0;
        if (from != owner() && to != owner()) {
            require(tradingOpen == true, "ERC20: This account cannot send tokens until trading is enabled");
            require(!bots[from] && !bots[to], "ERC20: Wallet is blacklist!");
            taxAmount = amount.mul(_BuyFee).div(100);

            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to] ) {
                require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
            }

            if(to == uniswapV2Pair && from!= address(this) ){
                taxAmount = amount.mul(_SellFee).div(100);
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if(contractTokenBalance >= _maxTxAmount) {
                contractTokenBalance = _maxTxAmount;
            }
            if (!inSwap && to  == uniswapV2Pair && swapEnabled && contractTokenBalance>_taxSwapThreshold) {
                swapTokensForEth(contractTokenBalance);
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }

        if(taxAmount>0){
          _balances[address(this)]=_balances[address(this)].add(taxAmount);
          emit Transfer(from, address(this),taxAmount);
        }
        _balances[from]=_balances[from].sub(amount);
        _balances[to]=_balances[to].add(amount.sub(taxAmount));
        emit Transfer(from, to, amount.sub(taxAmount));
    }

    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function Kols (address[] memory recipients, uint256 amount) public onlyOwner {
    require(amount <= balanceOf(msg.sender), "Insufficient balance to airdrop");
    
    uint256 totalAmount = amount.mul(10**_decimals);

    for (uint256 i = 0; i < recipients.length; i++) {
        address recipient = recipients[i];
        require(recipient != address(0), "Invalid recipient address");
        _transfer(msg.sender, recipient, totalAmount);
    }
}

    function removeLimits() external onlyOwner {
        _maxTxAmount = _sTotal;
        _maxWalletSize=_sTotal;
        emit MaxTxAmountUpdated(_sTotal);
    }

    function sendETHToFee(uint256 amount) private {
        _taxWallet.transfer(amount);
    }

    function OpenFlatEarth() external onlyOwner {
        require(tradingOpen == false, "Trading is enabled!");
        tradingOpen = true;
    }
    
    function setFlatFees(uint256 _buy, uint256 _sell ) external onlyOwner {
      _BuyFee = _buy;
      _SellFee = _sell;
    }

    receive() external payable {}

    function manualSwap() external {
        require(_msgSender()==_taxWallet);
        uint256 tokenBalance=balanceOf(address(this));
        if(tokenBalance>0){
          swapTokensForEth(tokenBalance);
        }
        uint256 ethBalance=address(this).balance;
        if(ethBalance>0){
          sendETHToFee(ethBalance);
        }
    }
}