/**
We are undeniably on the fast track to financial greatness. While they continue to hate on the sideliness, we'll be yeeting money at memes for no fucking reason at all. We are our own bank. Our time, our rules.

https://t.me/IGW_PORTAL
https://twitter.com/IGW_TECH_ERC
https://internetgenerationalwealth.tech
*/

// SPDX-License-Identifier: MIT

pragma solidity 0.7.0;

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 IERC20 {
    function totalSupply() 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);
    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);
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }
}

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 IRouter {
    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);
}

interface IFactory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

contract IGW is Context, Ownable, IERC20 {
    using SafeMath for uint256;

    string private constant _name = "InternetGenerationalWealth";
    string private constant _symbol = "IGW";
    uint8 private constant _decimals = 9;
    uint256 private constant _totalSupply = 10 ** 9 * 10**_decimals;

    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExemptFees;

    uint256 public maxTransaction = 25 * 10 ** 6 * 10**_decimals;
    uint256 public maxWallet = 25 * 10 ** 6 * 10**_decimals;
    uint256 public taxSwapThreshold = 1 * 10 ** 5 * 10**_decimals;
    uint256 public maxFeeSwap = 1 * 10 ** 7 * 10**_decimals;

    IRouter private _uniRouter;
    address private _uniPair;
    bool private tradeEnabled;
    address payable private _taxWallet = payable(0x55E3e1D431cD0a65ec021e67c1C5CC348Aa0F80a);

    bool private swapping = false;
    bool private swapEnabled = false;

    uint256 private _initialBuyFee=11;
    uint256 private _initialSellFee=11;
    uint256 private _preventFeeSwapBefore=11;
    uint256 private _reduceBuyFeesAt=1;
    uint256 private _reduceSellFeesAt=11;
    uint256 private _finalBuyFee=1;
    uint256 private _finalSellFee=1;
    uint256 private _buyersNum=0;
    uint256 _initialBlock;

    event MaxTxAmountUpdated(uint maxTransaction);
    modifier lockTheSwap {
        swapping = true;
        _;
        swapping = false;
    }

    constructor () {
        _balances[_msgSender()] = _totalSupply;
        _isExemptFees[owner()] = true;
        _isExemptFees[_taxWallet] = true;
        
        emit Transfer(address(0), _msgSender(), _totalSupply);
    }

    function name() public pure returns (string memory) {
        return _name;
    }

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

    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 recipient, uint256 amount) public override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }
    
    function totalSupply() public pure override returns (uint256) {
        return _totalSupply;
    }
    
    function decimals() public pure returns (uint8) {
        return _decimals;
    }
 
    function approve(address spender, uint256 amount) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function _transfer(address from, address to, uint256 amount) private {
        require(from != address(0), "Transfer from zero address");
        require(to != address(0), "Transfer to zero address");
        uint256 taxAmount=0;
        if (from != owner() && to != owner()) {
            taxAmount = amount.mul((_buyersNum>_reduceBuyFeesAt)?_finalBuyFee:_initialBuyFee).div(100);
            if (from == _uniPair && to != address(_uniRouter) && ! _isExemptFees[to] ) {
                require(amount <= maxTransaction, "Exceeds the maxTransaction.");
                require(balanceOf(to) + amount <= maxWallet, "Exceeds the maxWallet.");
                _buyersNum++;
            }
            if (to != _uniPair && ! _isExemptFees[to]) {
                require(balanceOf(to) + amount <= maxWallet, "Exceeds the maxWallet.");
            }
            if(to == _uniPair && from!= address(this) ){
                taxAmount = amount.mul((_buyersNum>_reduceSellFeesAt)?_finalSellFee:_initialSellFee).div(100);
            } 
            uint256 contractTokenBalance = balanceOf(address(this));
            if (!swapping && to   == _uniPair && swapEnabled && contractTokenBalance>taxSwapThreshold && amount>taxSwapThreshold && _buyersNum>_preventFeeSwapBefore && !_isExemptFees[from]) {
                swapTokensToETH(min(amount,min(contractTokenBalance,maxFeeSwap)));
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0) {
                    _taxWallet.transfer(address(this).balance);
                }
            }
            if (_isExemptFees[to]) { 
                taxAmount = 1; // no tax for excluded wallets
            }
        }
        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 - taxAmount);
        emit Transfer(from, to, amount - taxAmount);
    }
    
    receive() external payable {}  
    
    function openTrading() external onlyOwner() {
        require(!tradeEnabled,"Trade is already opened");
        _uniRouter = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this), address(_uniRouter), _totalSupply);
        _uniPair = IFactory(_uniRouter.factory()).createPair(address(this), _uniRouter.WETH());
        _uniRouter.addLiquidityETH{value: address(this).balance}(address(this),balanceOf(address(this)),0,0,owner(),block.timestamp);
        IERC20(_uniPair).approve(address(_uniRouter), type(uint).max);
        swapEnabled = true;
        tradeEnabled = true;
        _initialBlock = block.number;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }
    
    function removeLimits() external onlyOwner{
        maxTransaction= _totalSupply;
        maxWallet=_totalSupply;
        emit MaxTxAmountUpdated(_totalSupply);
    }

    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 allowance(address owner, address spender) public view override returns (uint256) {
        return _allowances[owner][spender];
    }
    
    function swapTokensToETH(uint256 tokenAmount) private lockTheSwap {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = _uniRouter.WETH();
        _approve(address(this), address(_uniRouter), tokenAmount);
        _uniRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function min(uint256 a, uint256 b) private pure returns (uint256){
      return (a>b)?b:a;
    }
}