/*
    Website: https://dragonage.finance
    Telegram: https://t.me/DragonAgeERC20
*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.4;

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;
    }

}

contract Ownable is Context {
    address private _owner;
    address private _previousOwner;
    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 IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

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);
}

interface IUniswapV2Pair {
	function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
}

contract DragonAge is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping (address => uint256) private _rOwned;
    mapping (address => uint256) private _tOwned;
    mapping (address => mapping (address => uint256)) private _allowances;
    mapping (address => bool) private _isExcludedFromFee;
    mapping (address => uint256) private sellcooldown;
    mapping (address => uint256) private buycooldown;
    mapping (address => bool) private bots;
    uint256 private constant MAX = ~uint256(0);
    uint256 private constant _tTotal = 1000000 * 10**18;
    uint256 private _rTotal = (MAX - (MAX % _tTotal));
    uint256 private _tFeeTotal;
	uint256 private _ATHPrice;
	uint256 private _ATHResetPrice;
	uint256 private _ATHResetPercent;
	uint256 private _maxTxAmount = _tTotal;
    
    uint8 private _devFee = 4;
    uint8 private _ATHFee = 6;
    address payable private _devWallet;
    address payable private _ATHWallet;
    
    
    string private constant _name = unicode"Dragon Age";
    string private constant _symbol = "DRAGONAGE";
    uint8 private constant _decimals = 18;
    
    IUniswapV2Router02 private uniswapV2Router;
	IUniswapV2Pair private uniswapV2Pair;
    address private _uniswapV2Pair;
    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;
	
	
	event ATHUpdated(uint256 _ATHPrice, address _ATHWallet);
	event MaxTxAmountUpdated(uint256 _maxTxAmount);
	
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }
    
    receive() external payable {}   
    
    constructor () {
        _devWallet = payable(_msgSender());
        _ATHWallet = payable(0);
        _rOwned[address(this)] = _rTotal;
        _isExcludedFromFee[owner()] = true;
        _isExcludedFromFee[address(this)] = true;
        _isExcludedFromFee[_devWallet] = true;
		_ATHPrice = 0;
		_ATHResetPrice = 0;
		_ATHResetPercent = 60;
		emit Transfer(address(0), address(this), _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 ATHPrice() public view returns (uint256) {
        return _ATHPrice;
    }
    
    function ATHWallet() public view returns (address) {
        return _ATHWallet;
    }
	
	function pairAddress() public view returns (address) {
        return _uniswapV2Pair;
    }
    
    function ATHResetPrice() public view returns (uint256) {
        return _ATHResetPrice;
    }
    
    function maxTxAmount() public view returns (uint256) {
        return _maxTxAmount;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return tokenFromReflection(_rOwned[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 tokenFromReflection(uint256 rAmount) private view returns(uint256) {
        require(rAmount <= _rTotal, "Amount must be less than total reflections");
        uint256 currentRate =  _getRate();
        return rAmount.div(currentRate);
    }

    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");
		if (owner != address(this)) {
			require(tradingOpen, "Trading not open yet");
		}
        _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");
        if (from != owner() && to != owner()) {
            require(!bots[from] && !bots[to]);
            if (from == _uniswapV2Pair && to != address(uniswapV2Router) && ! _isExcludedFromFee[to]) {
                // Buying
				require(tradingOpen);
                require(amount <= _maxTxAmount, "Buy amount exceeds max TX amount");
                require(buycooldown[to] < block.timestamp, "Buying again too soon");
				
				sellcooldown[to] = block.timestamp + (5 minutes);
				buycooldown[to] = block.timestamp + (3 minutes);
				
				uint256 currentPrice = getPrice();
				if (currentPrice > _ATHPrice) {
					// new ATH has been reached 
					_ATHWallet = payable(to);
					_ATHPrice = currentPrice;
					_ATHResetPrice = currentPrice.sub(currentPrice.mul(_ATHResetPercent).div(10**2));
					emit ATHUpdated(_ATHPrice, _ATHWallet);
				}
			}
			
            if (from == _ATHWallet) {
				// Our ATH wallet holder is selling/transferring,
				// reset price so next buyer becomes ATH holder.
				_ATHPrice = 0;
				_ATHWallet = payable(0);
				emit ATHUpdated(_ATHPrice, _ATHWallet);
			}
            
            uint256 contractTokenBalance = balanceOf(address(this));
            if (!inSwap && from != _uniswapV2Pair && swapEnabled) {
                require(sellcooldown[from] < block.timestamp, "Selling too soon");
                // Check to see if price has gone below ATH Reset price.
                uint256 currentPrice = getPrice();
                if (currentPrice < _ATHResetPrice) {
                        _ATHPrice = 0;
                        _ATHWallet = payable(0);
                        _ATHResetPrice = 0;
                }
                swapTokensForEth(contractTokenBalance);
                uint256 contractETHBalance = address(this).balance;
                if(contractETHBalance > 0 && _ATHWallet != address(0)) {
                    sendETHToFee(address(this).balance);
                }
            }

        }
        _tokenTransfer(from,to,amount);
    }

    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 sendETHToFee(uint256 amount) private {
        _devWallet.transfer(amount.div(2));
        _ATHWallet.transfer(amount.div(8));
    }
    
    function createPair() public onlyOwner() {
        require(!tradingOpen,"trading is already open");
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapV2Router = _uniswapV2Router;
        _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(uint256).max);
    }
    
    function openTrading() public onlyOwner(){
        require(!tradingOpen, "trading is already open");
        swapEnabled = true;
        tradingOpen = true;
    }
    
    function athResetPercent(uint256 newResetPercent) external onlyOwner() {
        _ATHResetPercent = newResetPercent;
    }
    
    function setBots(address[] memory bots_) public onlyOwner {
        for (uint i = 0; i < bots_.length; i++) {
            bots[bots_[i]] = true;
        }
    }
    
    function delBot(address notbot) public onlyOwner {
        bots[notbot] = false;
    }
	
	function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner() {
        require(maxTxPercent > 0, "Amount must be greater than 0");
        _maxTxAmount = _tTotal.mul(maxTxPercent).div(10**2);
        emit MaxTxAmountUpdated(_maxTxAmount);
    }
        
    function _tokenTransfer(address sender, address recipient, uint256 amount) private {
        _transferStandard(sender, recipient, amount);
    }

    function _transferStandard(address sender, address recipient, uint256 tAmount) private {
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee, uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getValues(tAmount);
        _rOwned[sender] = _rOwned[sender].sub(rAmount);
        _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount); 
        _takeTeam(tTeam);
        _reflectFee(rFee, tFee);
        emit Transfer(sender, recipient, tTransferAmount);
    }

    function _takeTeam(uint256 tTeam) private {
        uint256 currentRate =  _getRate();
        uint256 rTeam = tTeam.mul(currentRate);
        _rOwned[address(this)] = _rOwned[address(this)].add(rTeam);
    }

    function _reflectFee(uint256 rFee, uint256 tFee) private {
        _rTotal = _rTotal.sub(rFee);
        _tFeeTotal = _tFeeTotal.add(tFee);
    }

    function manualswap() external {
        require(_msgSender() == _devWallet);
        uint256 contractBalance = balanceOf(address(this));
        swapTokensForEth(contractBalance);
    }
    
    function manualsend() external {
        require(_msgSender() == _devWallet);
        uint256 contractETHBalance = address(this).balance;
        _devWallet.transfer(contractETHBalance);
    }
	
	function getPrice() public view returns (uint256) {
	    require(tradingOpen,"trading isn't open");
		IUniswapV2Pair pair = IUniswapV2Pair(_uniswapV2Pair);
		(uint112 token0, uint112 token1, uint32 blockTimestamp) = pair.getReserves();
		(uint256 tokenReserves, uint256 ethReserves) = (address(this) < uniswapV2Router.WETH()) ? (token0, token1) : (token1, token0);
		return ethReserves.mul(10000000000).div(tokenReserves);
	}
	
    function _getValues(uint256 tAmount) private view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
        (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) = _getTValues(tAmount, _devFee, _ATHFee);
        uint256 currentRate =  _getRate();
        (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = _getRValues(tAmount, tFee, tTeam, currentRate);
        return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);
    }

    function _getTValues(uint256 tAmount, uint256 taxFee, uint256 TeamFee) private pure returns (uint256, uint256, uint256) {
        uint256 tFee = tAmount.mul(taxFee).div(100);
        uint256 tTeam = tAmount.mul(TeamFee).div(100);
        uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);
        return (tTransferAmount, tFee, tTeam);
    }

    function _getRValues(uint256 tAmount, uint256 tFee, uint256 tTeam, uint256 currentRate) private pure returns (uint256, uint256, uint256) {
        uint256 rAmount = tAmount.mul(currentRate);
        uint256 rFee = tFee.mul(currentRate);
        uint256 rTeam = tTeam.mul(currentRate);
        uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);
        return (rAmount, rTransferAmount, rFee);
    }

	function _getRate() private view returns(uint256) {
        (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();
        return rSupply.div(tSupply);
    }

    function _getCurrentSupply() private view returns(uint256, uint256) {
        uint256 rSupply = _rTotal;
        uint256 tSupply = _tTotal;      
        if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
        return (rSupply, tSupply);
    }
	
	
}