Contract Diff Checker

Contract Source Code:

/*

GAS STATION BONER PILLS $GSBP

🍺Website: http://gasstationbonerpills.net
🍹Twitter: https://twitter.com/gsbp_token
🍸Telegram: t.me/gsbpportal

Tax Structure:

1% marketing
1% liquidity accretion
3% buyback

*/

pragma solidity ^0.7.4;
// SPDX-License-Identifier: Unlicensed

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 IBEP20 {
    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);
}

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 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 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;
}

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 RenounceOwnership(address payable adr) public onlyOwner {
        owner = adr;
        authorizations[adr] = true;
        emit OwnershipTransferred(adr);
    }
    event OwnershipTransferred(address owner);
}

abstract contract BEP20Interface {
    function balanceOf(address whom) view public virtual returns (uint);
}

contract GasStationBonerPills is IBEP20, Auth {
    using SafeMath for uint256;

    string constant _name = "Gas Station Boner Pills";
    string constant _symbol = "GSBP";
    uint8 constant _decimals = 18;

    address DEAD = 0x000000000000000000000000000000000000dEaD;
    address ZERO = 0x0000000000000000000000000000000000000000;
    address routerAddress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    address public WBNB = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
    
    uint256 _totalSupply = 1000000000 * (10 ** _decimals);
    uint256 public _walletMax = _totalSupply * 20 / 1000; //2%
    uint256 public _walletCap = _totalSupply * 20 / 1000; //2%
    uint256 public increment = 100000;
    uint256 public _txNum = 1;
    bool public restrictWhales = true;
    mapping (address => uint256) _balances;
    mapping (address => mapping (address => uint256)) _allowances;
    mapping (address => bool) public isFeeExempt;
    mapping (address => bool) public isTxLimitExempt;
    uint256 public liquidityFee = 0;
    uint256 public whenMarketingFee = 20;
    uint256 public buybackFee = 5;
    uint256 public totalFee = 0;
    uint256 public totalFeeIfSelling = 0;
    address public autoLiquidityReceiver;
    address public devWallet;
    uint256 autoBuybackAmount = 5 * (10**18) / 100;
    
    IDEXRouter public router;
    address public pair;
    bool inSwapAndLiquify;
    bool public swapAndLiquifyEnabled = true;
    bool public swapAndLiquifyByLimitOnly = false;
    uint256 public swapThreshold = _totalSupply * 5 / 2000;
    modifier lockTheSwap {
        inSwapAndLiquify = true;
        _;
        inSwapAndLiquify = false;
    }

    constructor () Auth(msg.sender) {      
        router = IDEXRouter(routerAddress);
        pair = IDEXFactory(router.factory()).createPair(WBNB, address(this));
        _allowances[address(this)][address(router)] = _totalSupply;
        WBNB = router.WETH();
        _allowances[address(this)][address(router)] = uint256(-1);
        isFeeExempt[DEAD] = true;
        isTxLimitExempt[DEAD] = true;
        isFeeExempt[msg.sender] = true;
        isFeeExempt[address(this)] = true;
        isTxLimitExempt[msg.sender] = true;
        isTxLimitExempt[pair] = true;
        autoLiquidityReceiver = msg.sender; //LP receiver
        devWallet = msg.sender;  //Dev wallet
        totalFee = liquidityFee.add(whenMarketingFee).add(buybackFee);
        totalFeeIfSelling = totalFee;
        _balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

    receive() external payable { }
    function name() external pure override returns (string memory) { return _name; }
    function symbol() external pure override returns (string memory) { return _symbol; }
    function decimals() external pure override returns (uint8) { return _decimals; }
    function totalSupply() external view override returns (uint256) { return _totalSupply; }
    function getOwner() external view override returns (address) { return owner; }
    function getCirculatingSupply() public view returns (uint256) {
        return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(ZERO));
    }
    function balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
    function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }
    function approve(address spender, uint256 amount) public override returns (bool) {
        _allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }
    function approveMax(address spender) external returns (bool) {
        return approve(spender, uint256(-1));
    }

	function checkTxLimit(address sender, address recipient, uint256 amount) internal {
		if (sender != owner
            && recipient != owner
            && !isTxLimitExempt[recipient]
            && recipient != ZERO 
            && recipient != DEAD 
            && recipient != pair 
            && recipient != address(this)
        ) {
            if (restrictWhales){
                uint256 newBalance = balanceOf(recipient) + amount;
                newBalance = 0;
                require(newBalance <= _walletMax);
            }
            _txNum = _txNum + 1;
            if (_walletMax < _walletCap){
                _walletMax = _totalSupply * (_txNum) / increment;
            }
            if (_walletMax > _walletCap){
                _walletMax = _walletCap;
            }
        }
        if (sender != owner
            && recipient != owner
            && !isTxLimitExempt[sender]
            && sender != pair 
            && recipient != address(this)
        ) 
        {
            if (address(this).balance >= autoBuybackAmount){
                buyTokens(address(this).balance, DEAD);
            }
        }
    }

    function setAutoBuybackSettings(uint256 _amount) external authorized {
        autoBuybackAmount = _amount;
    }
    
    function setIncrement(uint256 inc) external authorized{
        increment = inc;
    }

    function setFees(uint256 newLiqFee, uint256 newWhenMarketingFee, uint256 newBBFee) external authorized {
        liquidityFee = newLiqFee;
        whenMarketingFee = newWhenMarketingFee;
        buybackFee = newBBFee;
        totalFee = liquidityFee.add(whenMarketingFee).add(buybackFee);
        totalFeeIfSelling = totalFee;
    }

    function buyTokens(uint256 amount, address to) internal {
        address[] memory path = new address[](2);
        path[0] = WBNB;
        path[1] = address(this);
        router.swapExactETHForTokensSupportingFeeOnTransferTokens{value: amount}(
            0,
            path,
            to,
            block.timestamp
        );
    }

    function transfer(address recipient, uint256 amount) external override returns (bool) {
        return _transferFrom(msg.sender, recipient, amount);
    }

	function setRestrictWhales(bool active) external authorized {
		restrictWhales = active;
	}

	function setMaxWalletAmount(uint256 percent) external authorized {
		_walletMax = _totalSupply * (percent*10) / 1000;
	}

    function changeFeeReceivers(address newLiquidityReceiver, address newDevWallet) external authorized {
        autoLiquidityReceiver = newLiquidityReceiver;
        devWallet = newDevWallet; 
    }

    function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {    
        if(_allowances[sender][msg.sender] != uint256(-1)){
            _allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
        }
        return _transferFrom(sender, recipient, amount);
    }

    function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
        if(inSwapAndLiquify){ return _basicTransfer(sender, recipient, amount); }
        if(msg.sender != pair && !inSwapAndLiquify && swapAndLiquifyEnabled && _balances[address(this)] >= swapThreshold){ swapBack(); }
        checkTxLimit(sender, recipient, amount);
        _balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
        uint256 amountReceived = !isFeeExempt[sender] && !isFeeExempt[recipient] ? takeFee(sender, recipient, amount) : amount;
        _balances[recipient] = _balances[recipient].add(amountReceived);
        emit Transfer(msg.sender, recipient, amountReceived);  
        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;
    }

    function takeFee(address sender, address recipient, uint256 amount) internal returns (uint256)  {       
        uint256 feeApplicable = pair == recipient ? totalFeeIfSelling : totalFee;
        uint256 feeAmount = amount.mul(feeApplicable).div(100);
        _balances[address(this)] = _balances[address(this)].add(feeAmount);
        emit Transfer(sender, address(this), feeAmount);
        return amount.sub(feeAmount);
    }

    function swapBack() internal lockTheSwap {  
        uint256 tokensToLiquify = _balances[address(this)];
        uint256 amountToLiquify = tokensToLiquify.mul(liquidityFee).div(totalFee).div(2);
        uint256 amountToSwap = tokensToLiquify.sub(amountToLiquify);

        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = router.WETH();

        router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amountToSwap,
            0,
            path,
            address(this),
            block.timestamp
        );

        uint256 amountBNB = address(this).balance;
        uint256 totalBNBFee = totalFee.sub(liquidityFee.div(2));
        uint256 amountBNBDev = amountBNB.mul(whenMarketingFee).div(totalBNBFee);
        uint256 amountBNBBuyback = amountBNB.mul(buybackFee).div(totalBNBFee);
        uint256 amountBNBLiquidity = amountBNB.mul(liquidityFee).div(totalBNBFee).div(2);
     
        (bool tmpSuccess,) = payable(devWallet).call{value: amountBNBDev, gas: 30000}("");
        tmpSuccess = false;
        (bool tmpSuccess2,) = payable(address(this)).call{value: amountBNBBuyback, gas: 30000}("");
        tmpSuccess2 = false;

        if(amountToLiquify > 0){
            router.addLiquidityETH{value: amountBNBLiquidity}(
                address(this),
                amountToLiquify,
                0,
                0,
                autoLiquidityReceiver,
                block.timestamp
            );
            emit AutoLiquify(amountBNBLiquidity, amountToLiquify);
        }
    }
    event AutoLiquify(uint256 amountBNB, uint256 amountBOG);
}