Forkchoice Ethereum Mainnet

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    function owner() external view returns (address);
    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external pure 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);

    error OwnableUnauthorizedAccount(address account);
    error OwnableInvalidOwner(address owner);

    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);
    error ERC20InvalidSender(address sender);
    error ERC20InvalidReceiver(address receiver);
    error ERC20InvalidAmount();
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);
    error ERC20InvalidApprover(address approver);
    error ERC20InvalidSpender(address spender);
}

contract TEST is IERC20 {
    address private _owner;

    mapping(address account => uint256) private _balances;
    mapping(address account => mapping(address spender => uint256)) private _allowances;

    uint8 private constant _decimals = 9;
    uint256 private constant _totalSupply = 100_000_000 * (10 ** _decimals);
    string private constant _name = "Test Contract";
    string private constant _symbol = "TEST";
    mapping(address => bool) private _isExcludedFromTaxes;

    address public marketingWallet;
    bool public marketingEnabled = false;
    uint256 public marketingThreshold;
    IUniswapV2Router02 public dexRouter;
    mapping(address => bool) public lpPairs;

    struct Taxes {
        uint16 buy;
        uint16 sell;
        uint16 transfer;
    }

    uint16 public constant MAX_TAX_RATE = 500;
    uint16 public constant TAX_DIVISOR = 10000;
    Taxes public taxRates = Taxes({buy: 500, sell: 500, transfer: 0});

    constructor(address _dexRouter, bool createPair) payable {
        dexRouter = IUniswapV2Router02(_dexRouter);
        _owner = msg.sender;
        _balances[_owner] = _totalSupply;
        emit Transfer(address(0), _owner, _totalSupply);

        _approve(_owner, address(_dexRouter), type(uint256).max, false);
        _approve(address(this), address(_dexRouter), type(uint256).max, false);

        if (createPair) {
            address selfWETH = IUniswapV2Factory(dexRouter.factory()).createPair(dexRouter.WETH(), address(this));
            lpPairs[selfWETH] = true;
        }

        _isExcludedFromTaxes[_owner] = true;
        _isExcludedFromTaxes[address(this)] = true;
    }

    modifier onlyOwner() {
        if (_owner != msg.sender) {
            revert OwnableUnauthorizedAccount(msg.sender);
        }
        _;
    }

    bool private inSwap;

    modifier inSwapFlag() {
        inSwap = true;
        _;
        inSwap = false;
    }

    receive() external payable {}

    function owner() external view override returns (address) {
        return _owner;
    }

    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 pure override returns (uint256) {
        return _totalSupply;
    }

    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 isExcludedFromTaxes(address account) external view returns (bool) {
        return _isExcludedFromTaxes[account];
    }

    function approve(address spender, uint256 value) external returns (bool) {
        _approve(msg.sender, spender, value, true);
        return true;
    }

    function transfer(address to, uint256 value) external returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) external returns (bool) {
        _spendAllowance(from, msg.sender, value);
        _transfer(from, to, value);
        return true;
    }

    function setLpPair(address pair, bool enable) public onlyOwner {
        lpPairs[pair] = enable;
    }

    function setupMarketing(bool _enable, uint256 _threshold, address _recipient) public onlyOwner {
        marketingEnabled = _enable;
        marketingThreshold = _threshold;
        marketingWallet = _recipient;
        setExcludedFromTaxes(marketingWallet, true);
    }

    function setExcludedFromTaxes(address who, bool enabled) public onlyOwner {
        _isExcludedFromTaxes[who] = enabled;
    }

    function setTaxes(uint16 _buyRate, uint16 _sellRate, uint16 _transferRate) external onlyOwner {
        require(
            _buyRate <= MAX_TAX_RATE && _sellRate <= MAX_TAX_RATE && _transferRate <= MAX_TAX_RATE,
            "Rates no higher than 5%"
        );

        taxRates.buy = _buyRate;
        taxRates.sell = _sellRate;
        taxRates.transfer = _transferRate;
    }

    function sweepFund() external onlyOwner {
        payable(_owner).transfer(address(this).balance);
    }

    function sweepToken(address token) external onlyOwner {
        IERC20 TOKEN = IERC20(token);
        TOKEN.transfer(_owner, TOKEN.balanceOf(address(this)));
    }

    function airdrop(address[] memory accounts, uint256[] memory values) external onlyOwner {
        require(accounts.length == values.length, "Lengths do not match.");
        for (uint16 i = 0; i < accounts.length; i++) {
            if (balanceOf(msg.sender) < values[i]) {
                revert ERC20InsufficientBalance(msg.sender, balanceOf(msg.sender), values[i]);
            }
            _transfer(msg.sender, accounts[i], values[i]);
        }
    }

    function renounceOwnership() external onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) external onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }

        address oldOwner = _owner;

        _isExcludedFromTaxes[oldOwner] = false;
        _isExcludedFromTaxes[newOwner] = true;

        if (balanceOf(oldOwner) > 0) {
            _update(oldOwner, newOwner, balanceOf(oldOwner));
        }

        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    function _takeTaxes(address from, address to, uint256 amount) internal returns (uint256) {
        uint256 rate;

        if (lpPairs[from]) {
            rate = taxRates.buy;
        } else if (lpPairs[to]) {
            rate = taxRates.sell;
        } else {
            rate = taxRates.transfer;
        }

        if (rate == 0) return amount;
        uint256 feeAmount = amount * rate / TAX_DIVISOR;

        if (feeAmount > 0) {
            _update(from, address(this), feeAmount);
        }

        if (marketingEnabled && !inSwap && lpPairs[to] && balanceOf(address(this)) >= marketingThreshold) {
            _fundMarketing(balanceOf(address(this)));
        }

        return amount - feeAmount;
    }

    function _fundMarketing(uint256 amountIn) internal inSwapFlag {
        if (_allowances[address(this)][address(dexRouter)] != type(uint256).max) {
            _allowances[address(this)][address(dexRouter)] = type(uint256).max;
        }

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

        try dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            amountIn, 0, path, marketingWallet, block.timestamp
        ) {} catch {}
    }

    function _transfer(address from, address to, uint256 amount) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        if (amount == 0) {
            revert ERC20InvalidAmount();
        }

        bool takeTax = true;
        if (_isExcludedFromTaxes[from] || _isExcludedFromTaxes[to]) {
            takeTax = false;
        }
        uint256 amountAfterTax = takeTax ? _takeTaxes(from, to, amount) : amount;

        _update(from, to, amountAfterTax);
        emit Transfer(from, to, amountAfterTax);
    }

    function _update(address from, address to, uint256 value) internal {
        uint256 fromBalance = _balances[from];
        if (fromBalance < value) {
            revert ERC20InsufficientBalance(from, fromBalance, value);
        }
        unchecked {
            // Overflow not possible: value <= fromBalance <= totalSupply.
            _balances[from] = fromBalance - value;
        }

        unchecked {
            // Overflow not possible: balance + value is at most totalSupply, which we know fits into a uint256.
            _balances[to] += value;
        }
    }

    function _approve(address holder, address spender, uint256 value, bool emitEvent) internal {
        if (holder == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }

        _allowances[holder][spender] = value;
        if (emitEvent) {
            emit Approval(holder, spender, value);
        }
    }

    function _spendAllowance(address holder, address spender, uint256 value) internal {
        uint256 currentAllowance = _allowances[holder][spender];
        if (currentAllowance != type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(holder, spender, currentAllowance - value, false);
            }
        }
    }
}

pragma solidity >=0.5.0;

interface IUniswapV2Pair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

pragma solidity >=0.5.0;

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB) external returns (address pair);

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

pragma solidity >=0.6.2;

interface IUniswapV2Router01 {
    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);
}

pragma solidity >=0.6.2;

import './IUniswapV2Router01.sol';

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    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;
}