creation_sourcecode: /**
   *Submitted for verification at Etherscan.io on 2023-12-14
  */
  
  pragma solidity 0.8.20;
  
  // SPDX-License-Identifier: MIT
  
  /* 
  
  TELEGRAM: https://t.me/wallyai
  WEBSITE: https://wallyeth.com/
  TWITTER: https://twitter.com/WallyAiEth
  
  */
  
  
  abstract contract Context {
      function _msgSender() internal view virtual returns (address) {
          return msg.sender;
      }
  
      function _msgData() internal view virtual returns (bytes calldata) {
          this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
          return msg.data;
      }
  }
  
  interface IERC20 {
      /**
       * @dev Returns the amount of tokens in existence.
       */
      function totalSupply() external view returns (uint256);
  
      /**
       * @dev Returns the amount of tokens owned by `account`.
       */
      function balanceOf(address account) external view returns (uint256);
  
      /**
       * @dev Moves `amount` tokens from the caller's account to `recipient`.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * Emits a {Transfer} event.
       */
      function transfer(address recipient, uint256 amount) external returns (bool);
  
      /**
       * @dev Returns the remaining number of tokens that `spender` will be
       * allowed to spend on behalf of `owner` through {transferFrom}. This is
       * zero by default.
       *
       * This value changes when {approve} or {transferFrom} are called.
       */
      function allowance(address owner, address spender) external view returns (uint256);
  
      /**
       * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * IMPORTANT: Beware that changing an allowance with this method brings the risk
       * that someone may use both the old and the new allowance by unfortunate
       * transaction ordering. One possible solution to mitigate this race
       * condition is to first reduce the spender's allowance to 0 and set the
       * desired value afterwards:
       * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
       *
       * Emits an {Approval} event.
       */
      function approve(address spender, uint256 amount) external returns (bool);
  
      /**
       * @dev Moves `amount` tokens from `sender` to `recipient` using the
       * allowance mechanism. `amount` is then deducted from the caller's
       * allowance.
       *
       * Returns a boolean value indicating whether the operation succeeded.
       *
       * Emits a {Transfer} event.
       */
      function transferFrom(
          address sender,
          address recipient,
          uint256 amount
      ) external returns (bool);
  
      /**
       * @dev Emitted when `value` tokens are moved from one account (`from`) to
       * another (`to`).
       *
       * Note that `value` may be zero.
       */
      event Transfer(address indexed from, address indexed to, uint256 value);
  
      /**
       * @dev Emitted when the allowance of a `spender` for an `owner` is set by
       * a call to {approve}. `value` is the new allowance.
       */
      event Approval(address indexed owner, address indexed spender, uint256 value);
  }
  
  interface IERC20Metadata is IERC20{
      /**
       * @dev Returns the name of the token.
       */
      function name() external view returns (string memory);
  
      /**
       * @dev Returns the symbol of the token.
       */
      function symbol() external view returns (string memory);
  
      /**
       * @dev Returns the decimals places of the token.
       */
      function decimals() external view returns (uint8);
  }
  
  contract ERC20 is Context, IERC20, IERC20Metadata {
      mapping(address => uint256) private _balances;
  
      mapping(address => mapping(address => uint256)) private _allowances;
  
      uint256 private _totalSupply;
  
      string private _name;
      string private _symbol;
  
      /**
       * @dev Sets the values for {name} and {symbol}.
       *
       * All two of these values are immutable: they can only be set once during
       * construction.
       */
      constructor(string memory name_, string memory symbol_) {
          _name = name_;
          _symbol = symbol_;
      }
  
      /**
       * @dev Returns the name of the token.
       */
      function name() public view virtual override returns (string memory) {
          return _name;
      }
  
      function contractEthBalance() external view returns (uint256) {
          return address(this).balance;
      }
  
  
      /**
       * @dev Returns the symbol of the token, usually a shorter version of the
       * name.
       */
      function symbol() public view virtual override returns (string memory) {
          return _symbol;
      }
  
      /**
       * @dev Returns the number of decimals used to get its user representation.
       * For example, if `decimals` equals `2`, a balance of `505` tokens should
       * be displayed to a user as `5.05` (`505 / 10 ** 2`).
       *
       * Tokens usually opt for a value of 18, imitating the relationship between
       * Ether and Wei. This is the default value returned by this function, unless
       * it's overridden.
       *
       * NOTE: This information is only used for _display_ purposes: it in
       * no way affects any of the arithmetic of the contract, including
       * {IERC20-balanceOf} and {IERC20-transfer}.
       */
      function decimals() public view virtual override returns (uint8) {
          return 18;
      }
  
      /**
       * @dev See {IERC20-totalSupply}.
       */
      function totalSupply() public view virtual override returns (uint256) {
          return _totalSupply;
      }
  
      /**
       * @dev See {IERC20-balanceOf}.
       */
      function balanceOf(address account) public view virtual override returns (uint256) {
          return _balances[account];
      }
  
      /**
       * @dev See {IERC20-transfer}.
       *
       * Requirements:
       *
       * - `to` cannot be the zero address.
       * - the caller must have a balance of at least `amount`.
       */
      function transfer(address to, uint256 amount) public virtual override returns (bool) {
          address owner = _msgSender();
          _transfer(owner, to, amount);
          return true;
      }
  
      /**
       * @dev See {IERC20-allowance}.
       */
      function allowance(address owner, address spender) public view virtual override returns (uint256) {
          return _allowances[owner][spender];
      }
  
      /**
       * @dev See {IERC20-approve}.
       *
       * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
       * `transferFrom`. This is semantically equivalent to an infinite approval.
       *
       * Requirements:
       *
       * - `spender` cannot be the zero address.
       */
      function approve(address spender, uint256 amount) public virtual override returns (bool) {
          address owner = _msgSender();
          _approve(owner, spender, amount);
          return true;
      }
  
      /**
       * @dev See {IERC20-transferFrom}.
       *
       * Emits an {Approval} event indicating the updated allowance. This is not
       * required by the EIP. See the note at the beginning of {ERC20}.
       *
       * NOTE: Does not update the allowance if the current allowance
       * is the maximum `uint256`.
       *
       * Requirements:
       *
       * - `from` and `to` cannot be the zero address.
       * - `from` must have a balance of at least `amount`.
       * - the caller must have allowance for ``from``'s tokens of at least
       * `amount`.
       */
      function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
          address spender = _msgSender();
          _spendAllowance(from, spender, amount);
          _transfer(from, to, amount);
          return true;
      }
  
      /**
       * @dev Atomically increases the allowance granted to `spender` by the caller.
       *
       * This is an alternative to {approve} that can be used as a mitigation for
       * problems described in {IERC20-approve}.
       *
       * Emits an {Approval} event indicating the updated allowance.
       *
       * Requirements:
       *
       * - `spender` cannot be the zero address.
       */
      function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
          address owner = _msgSender();
          _approve(owner, spender, allowance(owner, spender) + addedValue);
          return true;
      }
  
      /**
       * @dev Atomically decreases the allowance granted to `spender` by the caller.
       *
       * This is an alternative to {approve} that can be used as a mitigation for
       * problems described in {IERC20-approve}.
       *
       * Emits an {Approval} event indicating the updated allowance.
       *
       * Requirements:
       *
       * - `spender` cannot be the zero address.
       * - `spender` must have allowance for the caller of at least
       * `subtractedValue`.
       */
      function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
          address owner = _msgSender();
          uint256 currentAllowance = allowance(owner, spender);
          require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
          unchecked {
              _approve(owner, spender, currentAllowance - subtractedValue);
          }
  
          return true;
      }
  
      /**
       * @dev Moves `amount` of tokens from `from` to `to`.
       *
       * This internal function is equivalent to {transfer}, and can be used to
       * e.g. implement automatic token fees, slashing mechanisms, etc.
       *
       * Emits a {Transfer} event.
       *
       * Requirements:
       *
       * - `from` cannot be the zero address.
       * - `to` cannot be the zero address.
       * - `from` must have a balance of at least `amount`.
       */
      function _transfer(address from, address to, uint256 amount) internal virtual {
          require(from != address(0), "ERC20: transfer from the zero address");
          require(to != address(0), "ERC20: transfer to the zero address");
  
          _beforeTokenTransfer(from, to, amount);
  
          uint256 fromBalance = _balances[from];
          require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
          unchecked {
              _balances[from] = fromBalance - amount;
              // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
              // decrementing then incrementing.
              _balances[to] += amount;
          }
  
          emit Transfer(from, to, amount);
  
          _afterTokenTransfer(from, to, amount);
      }
  
      /** @dev Creates `amount` tokens and assigns them to `account`, increasing
       * the total supply.
       *
       * Emits a {Transfer} event with `from` set to the zero address.
       *
       * Requirements:
       *
       * - `account` cannot be the zero address.
       */
      function _mint(address account, uint256 amount) internal virtual {
          require(account != address(0), "ERC20: mint to the zero address");
  
          _beforeTokenTransfer(address(0), account, amount);
  
          _totalSupply += amount;
          unchecked {
              // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
              _balances[account] += amount;
          }
          emit Transfer(address(0), account, amount);
  
          _afterTokenTransfer(address(0), account, amount);
      }
  
      /**
       * @dev Destroys `amount` tokens from `account`, reducing the
       * total supply.
       *
       * Emits a {Transfer} event with `to` set to the zero address.
       *
       * Requirements:
       *
       * - `account` cannot be the zero address.
       * - `account` must have at least `amount` tokens.
       */
      function _burn(address account, uint256 amount) internal virtual {
          require(account != address(0), "ERC20: burn from the zero address");
  
          _beforeTokenTransfer(account, address(0), amount);
  
          uint256 accountBalance = _balances[account];
          require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
          unchecked {
              _balances[account] = accountBalance - amount;
              // Overflow not possible: amount <= accountBalance <= totalSupply.
              _totalSupply -= amount;
          }
  
          emit Transfer(account, address(0), amount);
  
          _afterTokenTransfer(account, address(0), amount);
      }
  
      /**
       * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
       *
       * This internal function is equivalent to `approve`, and can be used to
       * e.g. set automatic allowances for certain subsystems, etc.
       *
       * Emits an {Approval} event.
       *
       * Requirements:
       *
       * - `owner` cannot be the zero address.
       * - `spender` cannot be the zero address.
       */
      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;
          emit Approval(owner, spender, amount);
      }
  
      /**
       * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
       *
       * Does not update the allowance amount in case of infinite allowance.
       * Revert if not enough allowance is available.
       *
       * Might emit an {Approval} event.
       */
      function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
          uint256 currentAllowance = allowance(owner, spender);
          if (currentAllowance != type(uint256).max) {
              require(currentAllowance >= amount, "ERC20: insufficient allowance");
              unchecked {
                  _approve(owner, spender, currentAllowance - amount);
              }
          }
      }
  
      /**
       * @dev Hook that is called before any transfer of tokens. This includes
       * minting and burning.
       *
       * Calling conditions:
       *
       * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
       * will be transferred to `to`.
       * - when `from` is zero, `amount` tokens will be minted for `to`.
       * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
       * - `from` and `to` are never both zero.
       *
       * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
       */
      function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}
  
      /**
       * @dev Hook that is called after any transfer of tokens. This includes
       * minting and burning.
       *
       * Calling conditions:
       *
       * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
       * has been transferred to `to`.
       * - when `from` is zero, `amount` tokens have been minted for `to`.
       * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
       * - `from` and `to` are never both zero.
       *
       * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
       */
      function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
  }
  
  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() external virtual onlyOwner {
          emit OwnershipTransferred(_owner, address(0));
          _owner = address(0);
      }
  
      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 IDexRouter {
      function factory() external pure returns (address);
      function WETH() external pure returns (address);
      function swapExactTokensForETHSupportingFeeOnTransferTokens(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline) external;
  }
  
  interface IDexFactory {
      function createPair(address tokenA, address tokenB) external returns (address pair);
  }
  
  contract wally is ERC20, Ownable {
  
      mapping (address => bool) public exemptFromFees;
      mapping (address => bool) public exemptFromLimits;
  
      bool public tradingActive;
  
      mapping (address => bool) public isAMMPair;
  
      uint256 public maxTransaction;
      uint256 public maxWallet;
  
      address public operationsAddress;
  
      uint256 public buyTax;
      uint256 public sellTax;
  
      mapping(address => uint256) private _holderLastTransferBlock; // to hold last Transfers temporarily during launch
      bool public transferDelayEnabled = true;
      bool public limitsInEffect = true;
  
      bool private swapping;
      uint256 public swapTokensAtAmt;
  
      address public lpPair;
      IDexRouter public dexRouter;
  
      uint256 public constant FEE_DIVISOR = 10000;
  
      // events
  
      event UpdatedMaxTransaction(uint256 newMax);
      event UpdatedMaxWallet(uint256 newMax);
      event SetExemptFromFees(address _address, bool _isExempt);
      event SetExemptFromLimits(address _address, bool _isExempt);
      event RemovedLimits();
      event UpdatedBuyTax(uint256 newAmt);
      event UpdatedSellTax(uint256 newAmt);
  
      // constructor
  
      constructor(string memory _name, string memory _symbol)
          ERC20(_name, _symbol)
      {   
          address newOwner = 0xc4A5e340d9C76BE7815Db49124eF6BAFADD5C584;
          _mint(newOwner, 1_000_000_000 * 1e18);
          uint256 _totalSupply = totalSupply();
  
          address _v2Router;
  
          // @dev assumes WETH pair
          if(block.chainid == 1){
              _v2Router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
          } else if(block.chainid == 5){
              _v2Router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
          } else {
              revert("Chain not configured");
          }
  
          dexRouter = IDexRouter(_v2Router);
  
          maxTransaction = _totalSupply * 20 / 1000;
          maxWallet = _totalSupply * 20 / 1000;
          swapTokensAtAmt = _totalSupply * 25 / 100000;
  
          operationsAddress = 0x2Ed04BBea3E26Dea63180f97068cD945e270D6c2;
  
          buyTax = 4900; // 1% = 100
          sellTax = 6000; // 1% = 100
  
          lpPair = IDexFactory(dexRouter.factory()).createPair(address(this), dexRouter.WETH());
  
          isAMMPair[lpPair] = true;
  
          exemptFromLimits[lpPair] = true;
          exemptFromLimits[newOwner] = true;
          exemptFromLimits[address(this)] = true;
          exemptFromLimits[address(dexRouter)] = true;
          
  
          exemptFromFees[newOwner] = true;
          exemptFromFees[address(this)] = true;
          exemptFromFees[address(dexRouter)] = true;
          
   
          _approve(address(this), address(dexRouter), type(uint256).max);
          transferOwnership(newOwner);
      }
  
      receive() external payable {}
  
      function _transfer(
          address from,
          address to,
          uint256 amount
      ) internal virtual override {
          
          if(exemptFromFees[from] || exemptFromFees[to] || swapping){
              super._transfer(from,to,amount);
              return;
          }
  
          require(tradingActive, "Trading not active");
  
          if(limitsInEffect){
              checkLimits(from, to, amount);
          }
  
          amount -= handleTax(from, to, amount);
  
          super._transfer(from,to,amount);
      }
  
      function checkLimits(address from, address to, uint256 amount) internal {
          if (transferDelayEnabled){
              if (to != address(dexRouter) && !isAMMPair[to]){
                  require(_holderLastTransferBlock[tx.origin] < block.number, "Transfer Delay enabled.");
                  _holderLastTransferBlock[tx.origin] = block.number;
              }
          }
  
          // buy
          if (isAMMPair[from] && !exemptFromLimits[to]) {
              require(amount <= maxTransaction, "Max tx exceeded.");
              require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
          } 
          // sell
          else if (isAMMPair[to] && !exemptFromLimits[from]) {
              require(amount <= maxTransaction, "Max tx exceeded.");
          }
          else if(!exemptFromLimits[to]) {
              require(amount + balanceOf(to) <= maxWallet, "Max wallet exceeded");
          }
      }
  
      function handleTax(address from, address to, uint256 amount) internal returns (uint256){
          if(balanceOf(address(this)) >= swapTokensAtAmt && !swapping && !isAMMPair[from]) {
              swapping = true;
              swapBack();
              swapping = false;
          }
          
          uint256 tax = 0;
  
          // on sell
          if (isAMMPair[to] && sellTax > 0){
              tax = amount * sellTax / FEE_DIVISOR;
          }
          // on buy
          else if(isAMMPair[from] && buyTax > 0) {
              tax = amount * buyTax / FEE_DIVISOR;
          }
          
          if(tax > 0){    
              super._transfer(from, address(this), tax);
          }
          
          return tax;
      }
  
      function swapTokensForETH(uint256 tokenAmt) private {
  
          address[] memory path = new address[](2);
          path[0] = address(this);
          path[1] = dexRouter.WETH();
  
          dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
              tokenAmt,
              0,
              path,
              address(this),
              block.timestamp
          );
      }
  
      function swapBack() private {
  
          uint256 contractBalance = balanceOf(address(this));
          
          if(contractBalance == 0) {return;}
  
          if(contractBalance > swapTokensAtAmt * 40){
              contractBalance = swapTokensAtAmt * 40;
          }
          
          swapTokensForETH(contractBalance);
              
          if(address(this).balance > 0){
              bool success;
              (success, ) = operationsAddress.call{value: address(this).balance}("");
          }
      }
  
      // owner functions
  
      function setExemptFromFees(address _address, bool _isExempt) external onlyOwner {
          require(_address != address(0), "Zero Address");
          exemptFromFees[_address] = _isExempt;
          emit SetExemptFromFees(_address, _isExempt);
      }
  
      function setExemptFromLimits(address _address, bool _isExempt) external onlyOwner {
          require(_address != address(0), "Zero Address");
          if(!_isExempt){
              require(_address != lpPair, "Pair");
          }
          exemptFromLimits[_address] = _isExempt;
          emit SetExemptFromLimits(_address, _isExempt);
      }
  
      function updateMaxTransaction(uint256 newNumInTokens) external onlyOwner {
          require(newNumInTokens >= (totalSupply() * 5 / 1000)/(10**decimals()), "Too low");
          maxTransaction = newNumInTokens * (10**decimals());
          emit UpdatedMaxTransaction(maxTransaction);
      }
  
      function updateMaxWallet(uint256 newNumInTokens) external onlyOwner {
          require(newNumInTokens >= (totalSupply() * 1 / 100)/(10**decimals()), "Too low");
          maxWallet = newNumInTokens * (10**decimals());
          emit UpdatedMaxWallet(maxWallet);
      }
  
      function updateTaxes(uint256 _buyTax, uint256 _sellTax) external onlyOwner {
          buyTax = _buyTax;
          emit UpdatedBuyTax(buyTax);
          sellTax = _sellTax;
          emit UpdatedSellTax(sellTax);
      }
  
      function enableTrading() external onlyOwner {
          require(!tradingActive, "Trading active");
          tradingActive = true;
      }
  
      function removeLimits() external onlyOwner {
          limitsInEffect = false;
          transferDelayEnabled = false;
          maxTransaction = totalSupply();
          maxWallet = totalSupply();
          emit RemovedLimits();
      }
  
      function disableTransferDelay() external onlyOwner {
          transferDelayEnabled = false;
      }
  
      function updateOperationsAddress(address _address) external onlyOwner {
          require(_address != address(0), "zero address");
          operationsAddress = _address;
      }
  }