creation_sourcecode: pragma solidity 0.8.20;
  
  abstract contract Context {
      function _msgSender() internal view virtual returns (address) {
          return msg.sender;
      }
  }
  
  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 transferOwnership(address newOwner) public onlyOwner {
          _transferOwnership(newOwner);
      }
  
      function _transferOwnership(address newOwner) internal {
          require(
              newOwner != address(0),
              "Ownable: new owner is the zero address"
          );
          emit OwnershipTransferred(_owner, newOwner);
          _owner = newOwner;
      }
  
      function renounceOwnership() public virtual onlyOwner {
          emit OwnershipTransferred(_owner, address(0));
          _owner = address(0);
      }
  }
  
  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
      );
  }
  
  interface IUniswapV2Factory {
      function createPair(address tokenA, address tokenB)
          external
          returns (address pair);
  }
  
  interface IUniswapV2Router02 {
      function swapExactTokensForETHSupportingFeeOnTransferTokens(
          uint256 amountIn,
          uint256 amountOutMin,
          address[] calldata path,
          address to,
          uint256 deadline
      ) external;
  
      function factory() external pure returns (address);
  
      function WETH() external pure returns (address);
  }
  
  contract TosCoin is Context, IERC20, Ownable {
      string private constant _name = "Tos Coin";
      string private constant _symbol = "TOS";
      uint256 private constant _totalSupply = 1_000_000_000e18;
      uint256 private constant onePercent = 10_000_000e18;
      uint256 private constant minSwap = 1_000e18;
      uint8 private constant _decimals = 18;
      mapping(address => uint256) private _balance;
      mapping(address => mapping(address => uint256)) private _allowances;
      mapping(address => bool) private _isExcludedFromFeeWallet;
  
      IUniswapV2Router02 immutable uniswapV2Router;
      address immutable uniswapV2Pair;
      address immutable WETH;
      address payable immutable marketingWallet;
  
      uint256 public buyTax;
      uint256 public sellTax;
  
      uint8 private launch;
      uint8 private inSwapAndLiquify;
  
      uint256 private launchBlock;
      uint256 public maxTxAmount = onePercent * 2; //max Tx for first mins after launch
  
  
  
      constructor() {
          uniswapV2Router = IUniswapV2Router02(
              0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
          );
          WETH = uniswapV2Router.WETH();
          buyTax = 100;
          sellTax = 0;
  
          uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(
              address(this),
              WETH
          );
  
          marketingWallet = payable(msg.sender);
          _balance[msg.sender] = _totalSupply;
          _isExcludedFromFeeWallet[marketingWallet] = true;
          _isExcludedFromFeeWallet[msg.sender] = true;
          _isExcludedFromFeeWallet[address(this)] = true;
          _allowances[address(this)][address(uniswapV2Router)] = type(uint256)
              .max;
          _allowances[msg.sender][address(uniswapV2Router)] = type(uint256).max;
          _allowances[marketingWallet][address(uniswapV2Router)] = type(uint256)
              .max;
  
          emit Transfer(address(0), _msgSender(), _totalSupply);
      }
  
      function name() public pure returns (string memory) {
          return _name;
      }
  
      function setMarketingWallet() public view returns (address) {
          return marketingWallet;
      }
  
      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 _totalSupply;
      }
  
      function balanceOf(address account) public view override returns (uint256) {
          return _balance[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()] - amount
          );
          return true;
      }
  
      function removeLimits() external onlyOwner {
          maxTxAmount = _totalSupply;
      }
  
      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 startTrading() external onlyOwner {
          launch = 1;
          launchBlock = block.number;
      }
  
      function excludeWalletFromFees(address wallet) external onlyOwner {
          _isExcludedFromFeeWallet[wallet] = true;
      }
  
      function updateFeeAmount(uint256 newBuyTax, uint256 newSellTax) external onlyOwner {
          require(newBuyTax < 120, "Cannot set buy tax greater than 12%");
          require(newSellTax < 120, "Cannot set sell tax greater than 12%");
          buyTax = newBuyTax;
          sellTax = newSellTax;
      }
  
      function _transfer(
          address from,
          address to,
          uint256 amount
      ) private {
          require(from != address(0), "ERC20: transfer from the zero address");
          require(amount > 1e9, "Min transfer amt");
  
          uint256 _tax;
          if (_isExcludedFromFeeWallet[from] || _isExcludedFromFeeWallet[to]) {
              _tax = 0;
          } else {
              require(
                  launch != 0 && amount <= maxTxAmount,
                  "Launch / Max TxAmount 1% at launch"
              );
  
              if (inSwapAndLiquify == 1) {
                  //No tax transfer
                  _balance[from] -= amount;
                  _balance[to] += amount;
  
                  emit Transfer(from, to, amount);
                  return;
              }
  
              if (from == uniswapV2Pair) {
                  _tax = buyTax;
              } else if (to == uniswapV2Pair) {
                  uint256 tokensToSwap = _balance[address(this)];
                  if (tokensToSwap > minSwap && inSwapAndLiquify == 0) {
                      if (tokensToSwap > onePercent) {
                          tokensToSwap = onePercent;
                      }
                      inSwapAndLiquify = 1;
                      address[] memory path = new address[](2);
                      path[0] = address(this);
                      path[1] = WETH;
                      uniswapV2Router
                          .swapExactTokensForETHSupportingFeeOnTransferTokens(
                              tokensToSwap,
                              0,
                              path,
                              marketingWallet,
                              block.timestamp
                          );
                      inSwapAndLiquify = 0;
                  }
                  _tax = sellTax;
              } else {
                  _tax = 0;
              }
          }
  
          //Is there tax for sender|receiver?
          if (_tax != 0) {
              //Tax transfer
              uint256 taxTokens = (amount * _tax) / 100;
              uint256 transferAmount = amount - taxTokens;
  
              _balance[from] -= amount;
              _balance[to] += transferAmount;
              _balance[address(this)] += taxTokens;
              emit Transfer(from, address(this), taxTokens);
              emit Transfer(from, to, transferAmount);
          } else {
              //No tax transfer
              _balance[from] -= amount;
              _balance[to] += amount;
  
              emit Transfer(from, to, amount);
          }
      }
  
      receive() external payable {}
  }