/*

Milarepa chanted aloud the Buddha's prediction that Kailash would become an important site for the accomplishment of Buddhist practice, 
and added that his own master Marpa had likewise spoken highly of the sacred mountain.

*/
// SPDX-License-Identifier: MIT

pragma solidity 0.8.7;

interface IERC20 {
  function totalSupply() external view returns (uint256);
  function decimals() external view returns (uint8);
  function symbol() external view returns (string memory);
  function name() external view returns (string memory);
  function getOwner() external view returns (address);
  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);
}

abstract contract Auth {
    address internal owner;
    mapping (address => bool) internal authorizations;

    constructor(address _owner) {
        owner = _owner;
        authorizations[_owner] = true;
    }

    modifier onlyOwner() {
        require(isOwner(msg.sender), "!OWNER"); _;
    }

    modifier authorized() {
        require(isAuthorized(msg.sender), "!AUTHORIZED"); _;
    }

    function authorize(address adr) public onlyOwner {
        authorizations[adr] = true;
    }

    function unauthorize(address adr) public onlyOwner {
        authorizations[adr] = false;
    }

    function isOwner(address account) public view returns (bool) {
        return account == owner;
    }

    function isAuthorized(address adr) public view returns (bool) {
        return authorizations[adr];
    }

    function transferOwnership(address payable adr) public onlyOwner {
        owner = adr;
        authorizations[adr] = true;
        emit OwnershipTransferred(adr);
    }

    event OwnershipTransferred(address owner);
}

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 IDEXFactory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IDEXRouter {
    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 swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

}

contract ERC20 is IERC20, Auth {
  using SafeMath for uint256;

  string constant _name = "MOUNT KAILASH";
  string constant _symbol = "MTKAILASH";
  uint8 constant _decimals = 18;

  uint256 _totalSupply = 1000000000 * (10**_decimals);

  mapping (address => uint256) private _balances;
  mapping (address => mapping (address => uint256)) private _allowances;

  mapping (address => bool) private _isExcludeFee;
  mapping (address => bool) private _isExcludeMaxHold;

  IDEXRouter public router;
  address NATIVETOKEN;
  address DEAD;
  address public pair;
  address public factory;
  address public currentRouter;
  
  address public marketingwallet;
  
  uint256 public totalfee;
  uint256 public marketingfee;
  uint256 public liquidityfee;
  uint256 public burnfee;
  uint256 public feeDenominator;
  uint256 public ratioDenominator;

  uint256 public maxHold;
  bool public maxOff;

  uint256 public swapthreshold;

  bool public inSwap;
  bool public inAddLP;
  bool public autoswap;
  bool public autoLP;

  bool public baseERC20;

  constructor() Auth(msg.sender) {

    currentRouter = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    factory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;
    NATIVETOKEN = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    DEAD = 0x000000000000000000000000000000000000dEaD;

    marketingwallet = 0x8Dc9A0462e8711185d1B8370C338F903C14bAED6;

    _isExcludeFee[msg.sender] = true;
    _isExcludeFee[address(this)] = true;
    _isExcludeFee[currentRouter] = true;
    _isExcludeFee[factory] = true;
    _isExcludeFee[marketingwallet] = true;
    _isExcludeFee[DEAD] = true;

    _isExcludeMaxHold[msg.sender] = true;
    _isExcludeMaxHold[address(this)] = true;
    _isExcludeMaxHold[currentRouter] = true;
    _isExcludeMaxHold[factory] = true;
    _isExcludeMaxHold[marketingwallet] = true;
    _isExcludeMaxHold[DEAD] = true;

    router = IDEXRouter(currentRouter);
    pair = IDEXFactory(router.factory()).createPair(NATIVETOKEN, address(this));
    
    _allowances[address(this)][address(router)] = type(uint256).max;
    _allowances[address(this)][address(factory)] = type(uint256).max;
    _allowances[address(this)][address(pair)] = type(uint256).max;
    IERC20(NATIVETOKEN).approve(address(router),type(uint256).max);
    IERC20(NATIVETOKEN).approve(address(factory),type(uint256).max);
    IERC20(NATIVETOKEN).approve(address(pair),type(uint256).max);

    _isExcludeMaxHold[pair] = true;

    _balances[msg.sender] = _totalSupply;

    maxHold = _totalSupply.mul(75).div(1000);

    marketingfee = 50;
    liquidityfee = 25;
    burnfee = 15;
    totalfee = 100;
    ratioDenominator = 75;
    feeDenominator = 1000;

    emit Transfer(address(0), msg.sender, _totalSupply);

  }

  function setFee(uint256 _marketing,uint256 _liquidity,uint256 _burn,uint256 _denominator) external authorized() returns (bool) {
    require( _marketing.add(_liquidity) <= _denominator.mul(25).div(100) );
    marketingfee = _marketing;
    liquidityfee = _liquidity;
    burnfee = _burn;
    totalfee = _marketing.add(_liquidity).add(_burn);
    ratioDenominator = _marketing.add(_liquidity);
    feeDenominator = _denominator;
    return true;
  }

  function updateNativeToken() external authorized() returns (bool) {
    NATIVETOKEN = router.WETH();
    return true;
  }

  function returnERC20(bool flag) external authorized() returns (bool) {
    baseERC20 = flag;
    return true;
  }

  function setFeeExempt(address account,bool flag) external authorized() returns (bool) {
    _isExcludeFee[account] = flag;
    return true;
  }

  function setMaxHoldExempt(address account,bool flag) external authorized() returns (bool) {
    _isExcludeMaxHold[account] = flag;
    return true;
  }

  function setMaxOff(bool flag) external authorized() returns (bool) {
    maxOff = flag;
    return true;
  }

  function updateMarketingwallet(address _marketing) external authorized() returns (bool) {
    marketingwallet = _marketing;
    return true;
  }

  function updateTxLimit(uint256 _maxHold) external authorized() returns (bool) {
    maxHold = _maxHold;
    return true;
  }

  function updateTxLimitPercentage(uint256 _maxHold,uint256 _denominator) external authorized() returns (bool) {
    maxHold = _totalSupply.mul(_maxHold).div(_denominator);
    return true;
  }

  function setAutoSwap(uint256 amount,bool flag,bool lp) external authorized() returns (bool) {
    swapthreshold = amount;
    autoswap = flag;
    autoLP = lp;
    return true;
  }

  function AddLiquidityETH(uint256 _tokenamount) external authorized() payable {
    _basictransfer(msg.sender,address(this),_tokenamount.mul(10**_decimals));
    swapthreshold = _balances[address(this)].mul(6).div(1000);
    inAddLP = true;
    router.addLiquidityETH{value: address(this).balance }(
    address(this),
    _balances[address(this)],
    0,
    0,
    marketingwallet,
    block.timestamp
    );
    inAddLP = false;
    autoswap = true;
    autoLP = true;
  }

  function getOwner() external view override returns (address) { return owner; }
  function decimals() external pure override returns (uint8) { return _decimals; }
  function symbol() external pure override returns (string memory) { return _symbol; }
  function name() external pure override returns (string memory) { return _name; }
  function totalSupply() external view override returns (uint256) { return _totalSupply; }
  function balanceOf(address account) external view override returns (uint256) { return _balances[account]; }

  function isExcludeFee(address account) external view returns (bool) { return _isExcludeFee[account]; }
  function isExcludeMaxHold(address account) external view returns (bool) { return _isExcludeMaxHold[account]; }

  function transfer(address recipient, uint256 amount) external override returns (bool) {
    if(inAddLP || inSwap || baseERC20 || msg.sender == factory){
    _basictransfer(msg.sender, recipient, amount);
    } else {

    if(_balances[address(this)]>swapthreshold && autoswap && msg.sender != pair){

    inSwap = true;
    uint256 amountToMarketing = swapthreshold.mul(marketingfee).div(ratioDenominator);
    uint256 currentthreshold = swapthreshold.sub(amountToMarketing);
    uint256 amountToLiquify = currentthreshold.div(2);
    uint256 amountToSwap = amountToMarketing.add(amountToLiquify);
    
    uint256 balanceBefore = address(this).balance;
    swap2ETH(amountToSwap);
    uint256 balanceAfter = address(this).balance.sub(balanceBefore);

    uint256 amountpaid = balanceAfter.mul(amountToMarketing).div(amountToSwap);
    uint256 amountLP = balanceAfter.sub(amountpaid);

    payable(marketingwallet).transfer(amountpaid);
    
    if(autoLP){
    autoAddLP(amountToLiquify,amountLP);
    }
    inSwap = false;

    }

    _transfer(msg.sender, recipient, amount);

    }
    return true;
  }

  function allowance(address owner, address spender) external view override returns (uint256) {
    return _allowances[owner][spender];
  }

  function approve(address spender, uint256 amount) external override returns (bool) {
    _approve(msg.sender, spender, amount);
    return true;
  }

  function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
    _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
    return true;
  }

  function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
    _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue));
    return true;
  }

  function swap2ETH(uint256 amount) internal {
    address[] memory path = new address[](2);
    path[0] = address(this);
    path[1] = NATIVETOKEN;
    router.swapExactTokensForETHSupportingFeeOnTransferTokens(
    amount,
    0,
    path,
    address(this),
    block.timestamp
    );
  }

  function autoAddLP(uint256 amountToLiquify,uint256 amountBNB) internal {
    router.addLiquidityETH{value: amountBNB }(
    address(this),
    amountToLiquify,
    0,
    0,
    marketingwallet,
    block.timestamp
    );
  }

  function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
    if(inAddLP || inSwap || baseERC20 || msg.sender == factory){
    _basictransfer(sender, recipient, amount);
    } else {

    if(_allowances[sender][msg.sender] != type(uint256).max){
    _allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount);
    }

    if(_balances[address(this)]>swapthreshold && autoswap && msg.sender != pair){

    inSwap = true;
    uint256 amountToMarketing = swapthreshold.mul(marketingfee).div(ratioDenominator);
    uint256 currentthreshold = swapthreshold.sub(amountToMarketing);
    uint256 amountToLiquify = currentthreshold.div(2);
    uint256 amountToSwap = amountToMarketing.add(amountToLiquify);
    
    uint256 balanceBefore = address(this).balance;
    swap2ETH(amountToSwap);
    uint256 balanceAfter = address(this).balance.sub(balanceBefore);

    uint256 amountpaid = balanceAfter.mul(amountToMarketing).div(amountToSwap);
    uint256 amountLP = balanceAfter.sub(amountpaid);

    payable(marketingwallet).transfer(amountpaid);
    
    if(autoLP){
    autoAddLP(amountToLiquify,amountLP);
    }
    inSwap = false;

    }

    _transfer(sender, recipient, amount);

    }
    return true;
  }

  function _transfer(address sender, address recipient, uint256 amount) internal {
    require(sender != address(0));
    require(recipient != address(0));

    if(!_isExcludeMaxHold[recipient] && !maxOff){
    require(_balances[recipient].add(amount) <= maxHold);
    }

    _balances[sender] = _balances[sender].sub(amount);
    _balances[recipient] = _balances[recipient].add(amount);

    uint256 tempfee;

    if (!_isExcludeFee[sender]) {
    tempfee = amount.mul(totalfee).div(feeDenominator);
    _basictransfer(recipient,address(this),tempfee.mul(ratioDenominator).div(totalfee));
    _basictransfer(recipient,DEAD,tempfee.mul(burnfee).div(totalfee));
    }
    
    emit Transfer(sender, recipient, amount.sub(tempfee));

  }

  function _basictransfer(address sender, address recipient, uint256 amount) internal {
    require(sender != address(0));
    require(recipient != address(0));
    _balances[sender] = _balances[sender].sub(amount);
    _balances[recipient] = _balances[recipient].add(amount);
    emit Transfer(sender, recipient, amount);
  }

  function _approve(address owner, address spender, uint256 amount) internal {
    require(owner != address(0));
    require(spender != address(0));

    _allowances[owner][spender] = amount;
    emit Approval(owner, spender, amount);
  }

  function rescue() external authorized() {
    payable(owner).transfer(address(this).balance);
  }

  receive() external payable { }
}