// SPDX-License-Identifier: MIT

/**
Wegbsite: https://www.blazestake.xyz
Dapp:     https://app.blazestake.xyz
Docs:     https://docs.blazestake.xyz

Twitter:  https://twitter.com/blazeStakeEth
Telegram: https://t.me/blazeStakeEth
*/

pragma solidity ^0.8.11;

interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    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);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}

abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return payable(msg.sender);
    }

    function _msgData() internal view virtual returns (bytes memory) {
        return msg.data;
    }
}

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;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

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(0x000000000000000000000000000000000000dEaD)
        );
        _owner = address(0x000000000000000000000000000000000000dEaD);
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);

    function symbol() external pure returns (string memory);

    function decimals() external pure returns (uint8);

    function totalSupply() external view returns (uint);

    function balanceOf(address owner) external view returns (uint);

    function allowance(
        address owner,
        address spender
    ) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);

    function transfer(address to, uint value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint value
    ) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);

    function PERMIT_TYPEHASH() external pure returns (bytes32);

    function nonces(address owner) external view returns (uint);

    function permit(
        address owner,
        address spender,
        uint value,
        uint deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    event Burn(
        address indexed sender,
        uint amount0,
        uint amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);

    function factory() external view returns (address);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function getReserves()
        external
        view
        returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);

    function price0CumulativeLast() external view returns (uint);

    function price1CumulativeLast() external view returns (uint);

    function kLast() external view returns (uint);

    function burn(address to) external returns (uint amount0, uint amount1);

    function swap(
        uint amount0Out,
        uint amount1Out,
        address to,
        bytes calldata data
    ) external;

    function skim(address to) external;

    function sync() external;

    function initialize(address, address) external;
}

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);

    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    )
        external
        payable
        returns (uint amountToken, uint amountETH, uint liquidity);

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);

    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountA, uint amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountToken, uint amountETH);

    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapExactETHForTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable returns (uint[] memory amounts);

    function swapTokensForExactETH(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapExactTokensForETH(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapETHForExactTokens(
        uint amountOut,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable returns (uint[] memory amounts);

    function quote(
        uint amountA,
        uint reserveA,
        uint reserveB
    ) external pure returns (uint amountB);

    function getAmountOut(
        uint amountIn,
        uint reserveIn,
        uint reserveOut
    ) external pure returns (uint amountOut);

    function getAmountIn(
        uint amountOut,
        uint reserveIn,
        uint reserveOut
    ) external pure returns (uint amountIn);

    function getAmountsOut(
        uint amountIn,
        address[] calldata path
    ) external view returns (uint[] memory amounts);

    function getAmountsIn(
        uint amountOut,
        address[] calldata path
    ) external view returns (uint[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);

    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

contract BLZSTAKE is Context, IERC20, Ownable {
    using SafeMath for uint256;

    address payable public devWallet =
        payable(0x95df3655BE95290Bb3ED64402d0E94556F867F71);

    address public immutable deadAddress =
        0x000000000000000000000000000000000000dEaD;
    address public immutable zeroAddress =
        0x0000000000000000000000000000000000000000;

    string private _name = unicode"BlazeStake";
    string private _symbol = unicode"BLZ";
    uint8 private _decimals = 18;

    mapping(address => uint256) _balances;
    mapping(address => mapping(address => uint256)) private _allowances;

    mapping(address => bool) public isExcludedFromFees;
    mapping(address => bool) public automatedMarketMakerPair;

    mapping(address => bool) public isWalletLimitExempt;
    mapping(address => bool) public isTxLimitExempt;

    uint256 private _totalSupply = 100_000_000 * 10 ** _decimals;

    uint256 public minTokensForSwap = _totalSupply.mul(1).div(100000);

    uint256 public _walletMax = _totalSupply.mul(20).div(1000); //2%
    uint256 public _maxTxAmount = _totalSupply.mul(20).div(1000); //2%
    
    uint256 private _maxTxSwap = _totalSupply.mul(2).div(1000);

    IUniswapV2Router02 public uniswapV2Router;
    address public uniswapV2Pair;

    bool inSwapAndLiquify;

    bool public swapAndLiquifyEnabled = false;
    bool public swapBackByLimitOnly = false;
    bool public tradingOpen = false;

    bool public checkWalletLimit = true;

    uint256 public _buyLiquidityFees = 0;
    uint256 public _buyMarketingFees = 15;

    uint256 public _sellLiquidityFees = 0;
    uint256 public _sellMarketingFees = 15;

    uint256 public _totalTaxIfBuying;
    uint256 public _totalTaxIfSelling;

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiqudity
    );

    event SwapETHForTokens(uint256 amountIn, address[] path);

    event SwapTokensForETH(uint256 amountIn, address[] path);

    modifier lockTheSwap() {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    constructor() {

        isExcludedFromFees[owner()] = true;
        isExcludedFromFees[devWallet] = true;
        isExcludedFromFees[address(this)] = true;

        isWalletLimitExempt[owner()] = true;
        isWalletLimitExempt[devWallet] = true;
        isWalletLimitExempt[address(this)] = true;

        isTxLimitExempt[owner()] = true;
        isTxLimitExempt[devWallet] = true;
        isTxLimitExempt[address(this)] = true;

        _totalTaxIfBuying = _buyLiquidityFees.add(_buyMarketingFees);
        _totalTaxIfSelling = _sellLiquidityFees.add(_sellMarketingFees);

        _balances[_msgSender()] = _totalSupply;

        emit Transfer(address(0), _msgSender(), _totalSupply);
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    function allowance(
        address owner,
        address spender
    ) public view override returns (uint256) {
        return _allowances[owner][spender];
    }

    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].add(addedValue)
        );
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].sub(
                subtractedValue,
                "ERC20: decreased allowance below zero"
            )
        );
        return true;
    }

    function approve(
        address spender,
        uint256 amount
    ) public override returns (bool) {
        _approve(_msgSender(), spender, amount);
        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 getCirculatingSupply() public view returns (uint256) {
        return
            _totalSupply.sub(balanceOf(deadAddress)).sub(
                balanceOf(zeroAddress)
            );
    }

    function transferToAddressETH(
        address payable recipient,
        uint256 amount
    ) private {
        recipient.transfer(amount);
    }

    //to recieve ETH from uniswapV2Router when swaping
    receive() external payable {}

    function transfer(
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        _transfer(_msgSender(), recipient, 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 addLiquidity() external payable onlyOwner {
        uniswapV2Router = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );

        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
            address(this),
            uniswapV2Router.WETH()
        );

        automatedMarketMakerPair[address(uniswapV2Pair)] = true;
        isWalletLimitExempt[address(uniswapV2Pair)] = true;

        _approve(address(this), address(uniswapV2Router), ~uint256(0));

        uniswapV2Router.addLiquidityETH{value: msg.value}(
            address(this),
            balanceOf(address(this)),
            0,
            0,
            owner(),
            block.timestamp
        );
    }

    function enableTrading() external onlyOwner {
        require(!tradingOpen, "Trading is already open");

        tradingOpen = true;
        swapAndLiquifyEnabled = true;
    }

    function removeLimits() external onlyOwner {
        _buyLiquidityFees = 0;
        _buyMarketingFees = 2;

        _sellLiquidityFees = 0;
        _sellMarketingFees = 2;

        _totalTaxIfBuying = _buyLiquidityFees.add(_buyMarketingFees);
        _totalTaxIfSelling = _sellLiquidityFees.add(_sellMarketingFees);

        _walletMax = type(uint).max;
        _maxTxAmount = type(uint).max;

        checkWalletLimit = false;
    }

    function swapBack(uint256 tAmount) private lockTheSwap {
        uint256 contractTokenBalance = balanceOf(address(this));

        uint256 amountToSwap = min(tAmount, min(contractTokenBalance, _maxTxSwap));

        swapTokensForEth(amountToSwap);

        uint256 recievedBalance = address(this).balance;
        if (recievedBalance > 0) {
            payable(devWallet).transfer(recievedBalance);
        }
    }

    function min(uint256 a, uint256 b) private pure returns (uint256) {
        return (a>b)?b:a;
    }

    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[1] = uniswapV2Router.WETH();
        path[0] = address(this);

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this), // The contract
            block.timestamp
        );
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) private returns (bool) {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "ERC20: transfer amount must greater than zero");

        require(
            tradingOpen ||
                isExcludedFromFees[sender] ||
                isExcludedFromFees[recipient],
            "Not Enabled"
        );

        if (inSwapAndLiquify || !swapAndLiquifyEnabled) {
            return _basicTransfer(sender, recipient, amount);
        } else {
            if (!isTxLimitExempt[sender] && !isTxLimitExempt[recipient]) {
                require(
                    amount <= _maxTxAmount,
                    "Transfer amount exceeds the maxTxAmount."
                );
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            bool overMinimumTokenBalance = contractTokenBalance >=
                minTokensForSwap && amount >= minTokensForSwap;

            if (
                overMinimumTokenBalance &&
                !inSwapAndLiquify &&
                automatedMarketMakerPair[recipient] &&
                swapAndLiquifyEnabled &&
                !isExcludedFromFees[sender] &&
                !isExcludedFromFees[recipient]
            ) {
                if (swapBackByLimitOnly)
                    contractTokenBalance = minTokensForSwap;
                swapBack(amount);
            }

            if (checkWalletLimit && !isWalletLimitExempt[recipient]) {
                require(
                    balanceOf(recipient).add(
                        amount.mul(_totalTaxIfSelling).div(100)
                    ) <= _walletMax,
                    "Amount Exceed From Max Wallet Limit!!"
                );
            }

            uint256 fAmount = amount;
            uint256 tAmount = 0;

            if (
                (!isTxLimitExempt[sender] || !isTxLimitExempt[recipient]) ||
                (automatedMarketMakerPair[recipient] || automatedMarketMakerPair[sender])
            ) {
                uint256 taxAmount = 0;
                //sell
                if (automatedMarketMakerPair[recipient]) {
                    taxAmount = amount.mul(_totalTaxIfBuying).div(100);
                } else if (automatedMarketMakerPair[sender]) {
                    taxAmount = amount.mul(_totalTaxIfSelling).div(100);
                }

                if (taxAmount > 0) {
                    _balances[address(this)] = _balances[address(this)].add(
                        taxAmount
                    );
                    emit Transfer(sender, address(this), taxAmount);
                }
                tAmount = fAmount;
                fAmount = fAmount.sub(taxAmount);
            }

            _balances[sender] = _balances[sender].sub(tAmount);
            _balances[recipient] = _balances[recipient].add(fAmount);
            emit Transfer(sender, recipient, fAmount);
            return true;
        }
    }

    function _basicTransfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal returns (bool) {
        _balances[sender] = _balances[sender].sub(
            amount,
            "Insufficient Balance"
        );
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
        return true;
    }
}