WLFIC

{{
  "language": "Solidity",
  "sources": {
    "wlfitest.sol": {
      "content": "//SPDX-License-Identifier: MIT
pragma solidity 0.8.20;

// ─────────────────────────────────────────────────────────────────────────────
// Oz-lite Context & Ownable
abstract contract Context {
    function _msgSender() internal view virtual returns (address) { return msg.sender; }
    function _msgData() internal view virtual returns (bytes calldata) { return msg.data; }
    function _contextSuffixLength() internal view virtual returns (uint256) { return 0; }
}

abstract contract Ownable is Context {
    address private _owner;
    error OwnableUnauthorizedAccount(address account);
    error OwnableInvalidOwner(address owner);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    constructor(address initialOwner) {
        if (initialOwner == address(0)) revert OwnableInvalidOwner(address(0));
        _transferOwnership(initialOwner);
    }
    modifier onlyOwner() { if (owner() != _msgSender()) revert OwnableUnauthorizedAccount(_msgSender()); _; }
    function owner() public view virtual returns (address) { return _owner; }
    function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); }
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) revert OwnableInvalidOwner(address(0));
        _transferOwnership(newOwner);
    }
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner,newOwner);
    }
}

// ─────────────────────────────────────────────────────────────────────────────
// Minimal ERC20
interface IERC20 {
    event Transfer(address indexed from,address indexed to,uint256 value);
    event Approval(address indexed owner,address indexed spender,uint256 value);
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to,uint256 value) external returns (bool);
    function allowance(address owner,address spender) external view returns (uint256);
    function approve(address spender,uint256 value) external returns (bool);
    function transferFrom(address from,address to,uint256 value) external returns (bool);
}
interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}
interface IERC20Errors {
    error ERC20InsufficientBalance(address sender,uint256 balance,uint256 needed);
    error ERC20InvalidSender(address sender);
    error ERC20InvalidReceiver(address receiver);
    error ERC20InsufficientAllowance(address spender,uint256 allowance,uint256 needed);
    error ERC20InvalidApprover(address approver);
    error ERC20InvalidSpender(address spender);
}
abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address=>uint256) private _balances;
    mapping(address=>mapping(address=>uint256)) private _allowances;
    uint256 private _totalSupply;
    string private _name; string private _symbol;
    constructor(string memory name_, string memory symbol_) { _name=name_; _symbol=symbol_; }
    function name() public view virtual returns (string memory) { return _name; }
    function symbol() public view virtual returns (string memory) { return _symbol; }
    function decimals() public view virtual returns (uint8) { return 18; }
    function totalSupply() public view virtual returns (uint256) { return _totalSupply; }
    function balanceOf(address account) public view virtual returns (uint256) { return _balances[account]; }
    function transfer(address to,uint256 value) public virtual returns (bool) {
        address o=_msgSender(); _transfer(o,to,value); return true;
    }
    function allowance(address o,address s) public view virtual returns (uint256) { return _allowances[o][s]; }
    function approve(address s,uint256 v) public virtual returns (bool) {
        address o=_msgSender(); _approve(o,s,v); return true;
    }
    function transferFrom(address f,address t,uint256 v) public virtual returns (bool) {
        address sp=_msgSender(); _spendAllowance(f,sp,v); _transfer(f,t,v); return true;
    }
    function _transfer(address from,address to,uint256 value) internal virtual {
        if (from==address(0)) revert ERC20InvalidSender(address(0));
        if (to==address(0)) revert ERC20InvalidReceiver(address(0));
        _update(from,to,value);
    }
    function _update(address from,address to,uint256 value) internal virtual {
        if (from==address(0)) { _totalSupply+=value; }
        else {
            uint256 fb=_balances[from];
            if (fb<value) revert ERC20InsufficientBalance(from,fb,value);
            unchecked { _balances[from]=fb-value; }
        }
        if (to==address(0)) { unchecked { _totalSupply-=value; } }
        else { unchecked { _balances[to]+=value; } }
        emit Transfer(from,to,value);
    }
    function _mint(address a,uint256 v) internal { if (a==address(0)) revert ERC20InvalidReceiver(address(0)); _update(address(0),a,v); }
    function _approve(address o,address s,uint256 v) internal { _approve(o,s,v,true); }
    function _approve(address o,address s,uint256 v,bool emitEvent) internal virtual {
        if (o==address(0)) revert ERC20InvalidApprover(address(0));
        if (s==address(0)) revert ERC20InvalidSpender(address(0));
        _allowances[o][s]=v; if (emitEvent) emit Approval(o,s,v);
    }
    function _spendAllowance(address o,address s,uint256 v) internal virtual {
        uint256 ca=allowance(o,s);
        if (ca<type(uint256).max) {
            if (ca<v) revert ERC20InsufficientAllowance(s,ca,v);
            unchecked { _approve(o,s,ca-v,false); }
        }
    }
}

// ─────────────────────────────────────────────────────────────────────────────
// SafeERC20 (nur safeTransfer genutzt)
library SafeERC20 {
    error SafeERC20FailedOperation(address token);
    function safeTransfer(IERC20 token,address to,uint256 value) internal {
        (bool ok, bytes memory data) =
            address(token).call(abi.encodeWithSelector(IERC20.transfer.selector,to,value));
        if (!ok || (data.length!=0 && !abi.decode(data,(bool)))) revert SafeERC20FailedOperation(address(token));
    }
}

// ─────────────────────────────────────────────────────────────────────────────
// Uniswap v2 Interfaces
interface IUniswapV2Factory { function createPair(address tokenA,address tokenB) external returns (address pair); }
interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);
    function addLiquidityETH(
        address token,uint amountTokenDesired,uint amountTokenMin,uint amountETHMin,address to,uint deadline
    ) external payable returns (uint amountToken,uint amountETH,uint liquidity);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,uint amountOutMin,address[] calldata path,address to,uint deadline
    ) external;
}

// ─────────────────────────────────────────────────────────────────────────────
// WLFIC with hardcoded 5% buy / 5% sell (non-modifiable)
contract WLFIC is ERC20, Ownable {
    using SafeERC20 for IERC20;

    // Router/Pair
    IUniswapV2Router02 public dexRouter;
    address public dexPair;

    // Swap trigger
    uint256 public liqTriggerAmount = 1000 ether;

    // ── HARD-CODED TAXES (unveränderbar) ─────────────────────────────────────
    uint256 public constant BUY_TAX_BPS  = 500; // 5.00%
    uint256 public constant SELL_TAX_BPS = 500; // 5.00%

    // Feste Aufteilung (Anteile: eth : liq)
    uint256 public immutable ethFeePart;
    uint256 public immutable liqFeePart;

    // Empfänger dauerhaft fest
    address public immutable treasuryReceiver;

    bool public tradingEnabled;
    bool private swapping;

    modifier swapLock(){ require(!swapping,"Swap in progress"); swapping=true; _; swapping=false; }

    event TradingActivated(bool enabled);
    event LiquidityTriggered(uint256 amountSwapped,uint256 tokensAdded,uint256 ethAdded);
    event TreasuryWithdrawn(address to,uint256 amount);
    event TokenRescue(address token,uint256 amount);

    constructor(
        address _router,
        uint256 _ethFeePart,
        uint256 _liqFeePart,
        address _treasury
    ) ERC20("WLFI CRUSH","WLFIC") Ownable(msg.sender)
    {
        _mint(_msgSender(), 10_000_000 ether);

        dexRouter = IUniswapV2Router02(_router);
        dexPair   = IUniswapV2Factory(dexRouter.factory()).createPair(address(this), dexRouter.WETH());

        ethFeePart       = _ethFeePart;
        liqFeePart       = _liqFeePart;
        treasuryReceiver = _treasury;
    }

    receive() external payable {}

    function _transfer(address from,address to,uint256 amount) internal override {
        require(amount>0,"Amount > 0");

        // Auto-Enable Trading beim ersten Transfer ins Pair
        if (!tradingEnabled && to == dexPair) {
            tradingEnabled = true;
            emit TradingActivated(true);
        }

        // Trading-Gate OHNE owner-gesteuerte Listen:
        // Vor Aktivierung erlauben wir nur Owner/Contract interne Bewegungen.
        if (!tradingEnabled) {
            bool allowed = (from == owner() || to == owner() || from == address(this) || to == address(this));
            require(allowed, "Trading not enabled");
        }

        uint256 taxAmount = 0;

        bool isBuy  = (from == dexPair);
        bool isSell = (to   == dexPair);

        if ((isBuy || isSell) && from != address(this)) {
            uint256 rate = isBuy ? BUY_TAX_BPS : SELL_TAX_BPS; // fix 5/5
            taxAmount = (amount * rate) / 10_000;
            super._transfer(from, address(this), taxAmount);
        }

        // Bei Sell ggf. Liquidity/Swap verarbeiten
        if (!swapping && isSell) {
            uint256 contractBal = balanceOf(address(this));
            if (contractBal >= liqTriggerAmount) {
                _handleLiquidity(contractBal);
            }
        }

        super._transfer(from, to, amount - taxAmount);
    }

    function _handleLiquidity(uint256 amount) private swapLock {
        if (amount == 0) return;

        uint256 parts = ethFeePart + liqFeePart;
        if (parts == 0) return;

        uint256 tokensForLiq     = (amount * liqFeePart) / parts;
        uint256 tokensForLiqHalf = tokensForLiq / 2;
        uint256 tokensToSwap     = amount - tokensForLiqHalf;

        uint256 startETH = address(this).balance;
        _swapTokensForETH(tokensToSwap);
        uint256 ethGained = address(this).balance - startETH;

        uint256 ethForLiq      = (ethGained * liqFeePart) / parts;
        uint256 ethForTreasury = ethGained - ethForLiq;

        if (tokensForLiqHalf > 0 && ethForLiq > 0) {
            _addLiquidity(tokensForLiqHalf, ethForLiq);
        }
        if (ethForTreasury > 0) {
            (bool ok, ) = payable(treasuryReceiver).call{value: ethForTreasury}("");
            require(ok, "Treasury transfer failed");
        }

        emit LiquidityTriggered(tokensToSwap, tokensForLiqHalf, ethForLiq);
    }

     function _swapTokensForETH(uint256 tokens) private {
        if (tokens == 0) return;

        address[] memory route = new address[](2);
        route[0] = address(this);
        route[1] = dexRouter.WETH();

        _approve(address(this), address(dexRouter), tokens);
        dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokens,
            0,
            route,
            address(this),
            block.timestamp
        );
    }

    function _addLiquidity(uint256 tokens,uint256 eth) private {
        if (tokens==0 || eth==0) return;
        _approve(address(this), address(dexRouter), tokens);
        dexRouter.addLiquidityETH{value: eth}(
            address(this), tokens, 0, 0, owner(), block.timestamp
        );
        if (!tradingEnabled) { tradingEnabled = true; emit TradingActivated(true); }
    }

    // ── Utilities (beibehalten)
    function rescueETH(address payable recipient) external onlyOwner {
        uint256 amt = address(this).balance; require(amt>0, "No ETH");
        (bool ok, ) = recipient.call{value: amt}(""); require(ok, "ETH transfer failed");
        emit TreasuryWithdrawn(recipient, amt);
    }

    function rescueTokens(address token) external onlyOwner {
        require(token != address(this), "Cannot rescue this token");
        uint256 bal = IERC20(token).balanceOf(address(this)); require(bal>0, "No tokens");
        IERC20(token).safeTransfer(owner(), bal);
        emit TokenRescue(token, bal);
    }

    // Optional: Trigger feinjustieren (kein Steuer-/Freeze-Risiko)
    function updateLiqTriggerAmount(uint256 newAmount) external onlyOwner {
        require(newAmount > 0, "Invalid amount"); liqTriggerAmount = newAmount;
    }
}
"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": false,
      "runs": 200
    },
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    },
    "remappings": []
  }
}}