// SPDX-License-Identifier: MIT

pragma solidity 0.8.19;

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);
}

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}

library Address {
    function sendValue(address payable recipient, uint256 amount) internal returns(bool){
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        return success; // always proceeds
    }
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

abstract 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);
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

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

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

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

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

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        uint256 currentAllowance = _allowances[sender][_msgSender()];
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
            unchecked {
                _approve(sender, _msgSender(), currentAllowance - amount);
            }
        }

        _transfer(sender, recipient, amount);

        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        uint256 currentAllowance = _allowances[_msgSender()][spender];
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(_msgSender(), spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        uint256 senderBalance = _balances[sender];
        require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[sender] = senderBalance - amount;
        }
        _balances[recipient] += amount;

        emit Transfer(sender, recipient, amount);
    }

    function _mintOnce(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        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);
    }
}

contract MEMETOON is ERC20, Ownable {
    using Address for address payable;

    mapping (address => bool) private _isExcludedFromFees;

    uint256 public  feeOnBuy;
    uint256 public  feeOnSell;

    uint256 public  feeOnTransfer;

    address public  feeReceiver;

    address public  uniswapV2Pair;

    event ExcludeFromFees(address indexed account, bool isExcluded);

    constructor () ERC20("MEMETOON", "MEME") 
    {   
        feeOnBuy  = 0;
        feeOnSell = 0;

        feeOnTransfer = 0;

        feeReceiver = 0x05B33196181Eb528cdeA0b147A134CD4D294fC93;

        _isExcludedFromFees[owner()] = true;
        _isExcludedFromFees[address(0xdead)] = true;
        _isExcludedFromFees[address(this)] = true;

        maxTransactionLimitEnabled = true;

        _isExcludedFromMaxTxLimit[owner()] = true;
        _isExcludedFromMaxTxLimit[address(this)] = true;
        _isExcludedFromMaxTxLimit[address(0xdead)] = true;
        _isExcludedFromMaxTxLimit[feeReceiver] = true;

        _mintOnce(owner(), 1e9 * (10 ** decimals()));

        maxTransactionAmountBuy     = totalSupply() * 10 / 1000;
        maxTransactionAmountSell    = totalSupply() * 10 / 1000;
    }

    receive() external payable {}

    function claimStuckTokens(address token) external onlyOwner {
        require(token != address(this), "CSLT: Owner cannot claim contract's balance of its own tokens");
        if (token == address(0x0)) {
            payable(msg.sender).sendValue(address(this).balance);
            return;
        }
        
        IERC20(token).transfer(msg.sender, IERC20(token).balanceOf(address(this)));
    }

    function excludeFromFees(address account, bool excluded) external onlyOwner{
        _isExcludedFromFees[account] = excluded;

        emit ExcludeFromFees(account, excluded);
    }

    function isExcludedFromFees(address account) public view returns(bool) {
        return _isExcludedFromFees[account];
    }

    event UpdateFees(uint256 feeOnBuy, uint256 feeOnSell);

    function updateFees(uint256 _feeOnSell, uint256 _feeOnBuy, uint256 _feeOnTransfer) external onlyOwner {
        feeOnBuy = _feeOnBuy;
        feeOnSell = _feeOnSell;
        feeOnTransfer = _feeOnTransfer;

        require(feeOnBuy <= 100, "CSLT: Total Fees cannot exceed the maximum");
        require(feeOnSell <= 100, "CSLT: Total Fees cannot exceed the maximum");
        require(feeOnTransfer <= 100, "CSLT: Total Fees cannot exceed the maximum");

        emit UpdateFees(feeOnSell, feeOnBuy);
    }

    event FeeReceiverChanged(address feeReceiver);

    function changeFeeReceiver(address _feeReceiver) external onlyOwner{
        require(_feeReceiver != address(0), "CSLT: Fee receiver cannot be the zero address");
        feeReceiver = _feeReceiver;

        emit FeeReceiverChanged(feeReceiver);
    }
    
    event TradingEnabled(bool tradingEnabled);

    bool public tradingEnabled;

    function enableTrading(address _uniswapAddress) external onlyOwner{
        require(!tradingEnabled, "CSLT: Trading already enabled.");
        tradingEnabled = true;
        uniswapV2Pair = _uniswapAddress;

        emit TradingEnabled(tradingEnabled);
    }

    function changeUniswapPair(address _uniswapAddress) external onlyOwner{
        uniswapV2Pair = _uniswapAddress;
    }

    function _transfer(address from,address to,uint256 amount) internal  override {
        require(from != address(0), "CSLT: transfer from the zero address");
        require(to != address(0), "CSLT: transfer to the zero address");
        require(tradingEnabled || _isExcludedFromFees[from] || _isExcludedFromFees[to], "CSLT: Trading not yet enabled!");
       
        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        if (maxTransactionLimitEnabled) 
        {
            if ((from == uniswapV2Pair || to == uniswapV2Pair) &&
                !_isExcludedFromMaxTxLimit[from] && 
                !_isExcludedFromMaxTxLimit[to]
            ) {
                if (from == uniswapV2Pair) {
                    require(
                        amount <= maxTransactionAmountBuy,  
                        "AntiWhale: Transfer amount exceeds the maxTransactionAmount"
                    );
                } else {
                    require(
                        amount <= maxTransactionAmountSell, 
                        "AntiWhale: Transfer amount exceeds the maxTransactionAmount"
                    );
                }
            }
        }

        uint256 _totalFees;
        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            _totalFees = 0;
        } else if (from == uniswapV2Pair) {
            _totalFees = feeOnBuy;
        } else if (to == uniswapV2Pair) {
            _totalFees =  feeOnSell;
        } else {
            _totalFees = feeOnTransfer;
        }

        if (_totalFees > 0) {
            uint256 fees = (amount * _totalFees) / 100;
            amount = amount - fees;
            super._transfer(from, address(feeReceiver), fees);
        }

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

    mapping(address => bool) private _isExcludedFromMaxTxLimit;
    bool    public  maxTransactionLimitEnabled;
    uint256 public  maxTransactionAmountBuy;
    uint256 public  maxTransactionAmountSell;

    event ExcludedFromMaxTransactionLimit(address indexed account, bool isExcluded);
    event MaxTransactionLimitStateChanged(bool maxTransactionLimit);
    event MaxTransactionLimitAmountChanged(uint256 maxTransactionAmountBuy, uint256 maxTransactionAmountSell);

    function setEnableMaxTransactionLimit(bool enable) external onlyOwner {
        require(enable != maxTransactionLimitEnabled, "Max transaction limit is already set to that state");
        maxTransactionLimitEnabled = enable;

        emit MaxTransactionLimitStateChanged(maxTransactionLimitEnabled);
    }

    function setMaxTransactionAmounts(uint256 _maxTransactionAmountBuy, uint256 _maxTransactionAmountSell) external onlyOwner {
        require(
            _maxTransactionAmountBuy  >= (totalSupply() / (10 ** decimals())) / 1_000 && 
            _maxTransactionAmountSell >= (totalSupply() / (10 ** decimals())) / 1_000, 
            "Max Transaction limis cannot be lower than 0.1% of total supply"
        ); 
        maxTransactionAmountBuy  = _maxTransactionAmountBuy  * (10 ** decimals());
        maxTransactionAmountSell = _maxTransactionAmountSell * (10 ** decimals());

        emit MaxTransactionLimitAmountChanged(maxTransactionAmountBuy, maxTransactionAmountSell);
    }

    function excludeFromMaxTransactionLimit(address account, bool exclude) external onlyOwner {
        require( _isExcludedFromMaxTxLimit[account] != exclude, "Account is already set to that state");
        require(account != address(this), "Can't set this address.");

        _isExcludedFromMaxTxLimit[account] = exclude;

        emit ExcludedFromMaxTransactionLimit(account, exclude);
    }

    function isExcludedFromMaxTransaction(address account) public view returns(bool) {
        return _isExcludedFromMaxTxLimit[account];
    }
}

{
  "compilationTarget": {
    "MEMETOON.sol": "MEMETOON"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}