Address

• contracts/FOMC.sol
• @openzeppelin/contracts/utils/Context.sol
• @openzeppelin/contracts/access/Ownable.sol
• @openzeppelin/contracts/token/ERC20/ERC20.sol
• @openzeppelin/contracts/token/ERC20/IERC20.sol
• @openzeppelin/contracts/utils/math/SafeMath.sol
• @uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol
• @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
• @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router01.sol
• @uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";

contract FOMC is ERC20, Ownable {
    using SafeMath for uint256;

    IUniswapV2Router02 public immutable uniswapV2Router;
    address public immutable uniswapV2Pair;
    address public constant deadAddress = address(0xdead);
    address public routerCA = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D; // 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D uniswap

    bool private swapping;

    address public mktgWallet;
    address public devWallet;
    address public liqWallet;
    address public operationsWallet;

    uint256 public maxTransactionAmount;
    uint256 public swapTokensAtAmount;
    uint256 public maxWallet;

    bool public limitsInEffect = true;
    bool public tradingActive = false;
    bool public swapEnabled = false;

    // Anti-bot and anti-whale mappings and variables
    mapping(address => uint256) private _holderLastTransferTimestamp;
    bool public transferDelayEnabled = true;
    uint256 private launchBlock;
    uint256 private deadBlocks;
    mapping(address => bool) public blocked;

    uint256 public buyTotalFees;
    uint256 public buyMktgFee;
    uint256 public buyLiquidityFee;
    uint256 public buyDevFee;
    uint256 public buyOperationsFee;

    uint256 public sellTotalFees;
    uint256 public sellMktgFee;
    uint256 public sellLiquidityFee;
    uint256 public sellDevFee;
    uint256 public sellOperationsFee;

    uint256 public tokensForMktg;
    uint256 public tokensForLiquidity;
    uint256 public tokensForDev;
    uint256 public tokensForOperations;

    mapping(address => bool) private _isExcludedFromFees;
    mapping(address => bool) public _isExcludedMaxTransactionAmount;

    mapping(address => bool) public automatedMarketMakerPairs;

    event UpdateUniswapV2Router(
        address indexed newAddress,
        address indexed oldAddress
    );

    event ExcludeFromFees(address indexed account, bool isExcluded);

    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);

    event mktgWalletUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event devWalletUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event liqWalletUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event operationsWalletUpdated(
        address indexed newWallet,
        address indexed oldWallet
    );

    event SwapAndLiquify(
        uint256 tokensSwapped,
        uint256 ethReceived,
        uint256 tokensIntoLiquidity
    );

    constructor() ERC20("FOMC", "FOMC") {
        IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(routerCA);

        excludeFromMaxTransaction(address(_uniswapV2Router), true);
        uniswapV2Router = _uniswapV2Router;

        uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
            .createPair(address(this), _uniswapV2Router.WETH());
        excludeFromMaxTransaction(address(uniswapV2Pair), true);
        _setAutomatedMarketMakerPair(address(uniswapV2Pair), true);

        // launch buy fees
        uint256 _buyMktgFee = 0;
        uint256 _buyLiquidityFee = 0;
        uint256 _buyDevFee = 0;
        uint256 _buyOperationsFee = 0;

        // launch sell fees
        uint256 _sellMktgFee = 2;
        uint256 _sellLiquidityFee = 0;
        uint256 _sellDevFee = 0;
        uint256 _sellOperationsFee = 0;

        uint256 totalSupply = 31_380_000_000_000 * 1e18;

        maxTransactionAmount = totalSupply / 10000; // 0.01% max txn
        maxWallet = (totalSupply * 5) / 10000; // 0.05% max wallet
        swapTokensAtAmount = totalSupply / 10000; // 0.01% swap wallet

        buyMktgFee = _buyMktgFee;
        buyLiquidityFee = _buyLiquidityFee;
        buyDevFee = _buyDevFee;
        buyOperationsFee = _buyOperationsFee;
        buyTotalFees =
            buyMktgFee +
            buyLiquidityFee +
            buyDevFee +
            buyOperationsFee;

        sellMktgFee = _sellMktgFee;
        sellLiquidityFee = _sellLiquidityFee;
        sellDevFee = _sellDevFee;
        sellOperationsFee = _sellOperationsFee;
        sellTotalFees =
            sellMktgFee +
            sellLiquidityFee +
            sellDevFee +
            sellOperationsFee;

        mktgWallet = address(0x80c934F0BC61fD431DD33CA2fc6e1FB6D34C8483);
        devWallet = address(0x80c934F0BC61fD431DD33CA2fc6e1FB6D34C8483);
        liqWallet = address(0x80c934F0BC61fD431DD33CA2fc6e1FB6D34C8483);
        operationsWallet = address(0x80c934F0BC61fD431DD33CA2fc6e1FB6D34C8483);

        // exclude from paying fees or having max transaction amount
        excludeFromFees(owner(), true);
        excludeFromFees(address(this), true);
        excludeFromFees(address(0xdead), true);

        excludeFromMaxTransaction(owner(), true);
        excludeFromMaxTransaction(address(this), true);
        excludeFromMaxTransaction(address(0xdead), true);

        _mint(msg.sender, totalSupply);
    }

    receive() external payable {}

    function enableTrading(uint256 _deadBlocks) external onlyOwner {
        require(!tradingActive, "Token launched");
        tradingActive = true;
        launchBlock = block.number;
        swapEnabled = true;
        deadBlocks = _deadBlocks;
    }

    // remove limits after token is stable
    function removeLimits() external onlyOwner returns (bool) {
        limitsInEffect = false;
        return true;
    }

    // disable Transfer delay - cannot be reenabled
    function disableTransferDelay() external onlyOwner returns (bool) {
        transferDelayEnabled = false;
        return true;
    }

    // change the minimum amount of tokens to sell from fees
    function updateSwapTokensAtAmount(
        uint256 newAmount
    ) external onlyOwner returns (bool) {
        require(
            newAmount >= (totalSupply() * 1) / 100000,
            "Swap amount cannot be lower than 0.001% total supply."
        );
        require(
            newAmount <= (totalSupply() * 5) / 1000,
            "Swap amount cannot be higher than 0.5% total supply."
        );
        swapTokensAtAmount = newAmount;
        return true;
    }

    function updateMaxTxnAmount(uint256 newNum) external onlyOwner {
        require(
            newNum >= ((totalSupply() * 1) / 1000) / 1e18,
            "Cannot set maxTransactionAmount lower than 0.1%"
        );
        maxTransactionAmount = newNum * (10 ** 18);
    }

    function updateMaxWalletAmount(uint256 newNum) external onlyOwner {
        require(
            newNum >= ((totalSupply() * 5) / 1000) / 1e18,
            "Cannot set maxWallet lower than 0.5%"
        );
        maxWallet = newNum * (10 ** 18);
    }

    function excludeFromMaxTransaction(
        address updAds,
        bool isEx
    ) public onlyOwner {
        _isExcludedMaxTransactionAmount[updAds] = isEx;
    }

    // only use to disable contract sales if absolutely necessary (emergency use only)
    function updateSwapEnabled(bool enabled) external onlyOwner {
        swapEnabled = enabled;
    }

    function updateBuyFees(
        uint256 _mktgFee,
        uint256 _liquidityFee,
        uint256 _devFee,
        uint256 _operationsFee
    ) external onlyOwner {
        buyMktgFee = _mktgFee;
        buyLiquidityFee = _liquidityFee;
        buyDevFee = _devFee;
        buyOperationsFee = _operationsFee;
        buyTotalFees =
            buyMktgFee +
            buyLiquidityFee +
            buyDevFee +
            buyOperationsFee;
        require(buyTotalFees <= 99);
    }

    function updateSellFees(
        uint256 _mktgFee,
        uint256 _liquidityFee,
        uint256 _devFee,
        uint256 _operationsFee
    ) external onlyOwner {
        sellMktgFee = _mktgFee;
        sellLiquidityFee = _liquidityFee;
        sellDevFee = _devFee;
        sellOperationsFee = _operationsFee;
        sellTotalFees =
            sellMktgFee +
            sellLiquidityFee +
            sellDevFee +
            sellOperationsFee;
        require(sellTotalFees <= 99);
    }

    function excludeFromFees(address account, bool excluded) public onlyOwner {
        _isExcludedFromFees[account] = excluded;
        emit ExcludeFromFees(account, excluded);
    }

    function setAutomatedMarketMakerPair(
        address pair,
        bool value
    ) public onlyOwner {
        require(
            pair != uniswapV2Pair,
            "The pair cannot be removed from automatedMarketMakerPairs"
        );

        _setAutomatedMarketMakerPair(pair, value);
    }

    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;

        emit SetAutomatedMarketMakerPair(pair, value);
    }

    function updatemktgWallet(address newmktgWallet) external onlyOwner {
        emit mktgWalletUpdated(newmktgWallet, mktgWallet);
        mktgWallet = newmktgWallet;
    }

    function updateDevWallet(address newWallet) external onlyOwner {
        emit devWalletUpdated(newWallet, devWallet);
        devWallet = newWallet;
    }

    function updateoperationsWallet(address newWallet) external onlyOwner {
        emit operationsWalletUpdated(newWallet, operationsWallet);
        operationsWallet = newWallet;
    }

    function updateLiqWallet(address newLiqWallet) external onlyOwner {
        emit liqWalletUpdated(newLiqWallet, liqWallet);
        liqWallet = newLiqWallet;
    }

    function isExcludedFromFees(address account) public view returns (bool) {
        return _isExcludedFromFees[account];
    }

    event BoughtEarly(address indexed sniper);

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(!blocked[from], "Sniper blocked");

        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }

        if (limitsInEffect) {
            if (
                from != owner() &&
                to != owner() &&
                to != address(0) &&
                to != address(0xdead) &&
                !swapping
            ) {
                if (!tradingActive) {
                    require(
                        _isExcludedFromFees[from] || _isExcludedFromFees[to],
                        "Trading is not active."
                    );
                }

                if (
                    block.number <= launchBlock + deadBlocks &&
                    from == address(uniswapV2Pair) &&
                    to != routerCA &&
                    to != address(this) &&
                    to != address(uniswapV2Pair)
                ) {
                    blocked[to] = true;
                    emit BoughtEarly(to);
                }

                // at launch if the transfer delay is enabled, ensure the block timestamps for purchasers is set -- during launch.
                if (transferDelayEnabled) {
                    if (
                        to != owner() &&
                        to != address(uniswapV2Router) &&
                        to != address(uniswapV2Pair)
                    ) {
                        require(
                            _holderLastTransferTimestamp[tx.origin] <
                                block.number,
                            "_transfer:: Transfer Delay enabled. Only one purchase per block allowed."
                        );
                        _holderLastTransferTimestamp[tx.origin] = block.number;
                    }
                }

                //when buy
                if (
                    automatedMarketMakerPairs[from] &&
                    !_isExcludedMaxTransactionAmount[to]
                ) {
                    require(
                        amount <= maxTransactionAmount,
                        "Buy transfer amount exceeds the maxTransactionAmount."
                    );
                    require(
                        amount + balanceOf(to) <= maxWallet,
                        "Max wallet exceeded"
                    );
                }
                //when sell
                else if (
                    automatedMarketMakerPairs[to] &&
                    !_isExcludedMaxTransactionAmount[from]
                ) {
                    require(
                        amount <= maxTransactionAmount,
                        "Sell transfer amount exceeds the maxTransactionAmount."
                    );
                } else if (!_isExcludedMaxTransactionAmount[to]) {
                    require(
                        amount + balanceOf(to) <= maxWallet,
                        "Max wallet exceeded"
                    );
                }
            }
        }

        uint256 contractTokenBalance = balanceOf(address(this));

        bool canSwap = contractTokenBalance >= swapTokensAtAmount;

        if (
            canSwap &&
            swapEnabled &&
            !swapping &&
            !automatedMarketMakerPairs[from] &&
            !_isExcludedFromFees[from] &&
            !_isExcludedFromFees[to]
        ) {
            swapping = true;

            swapBack();

            swapping = false;
        }

        bool takeFee = !swapping;

        // if any account belongs to _isExcludedFromFee account then remove the fee
        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }

        uint256 fees = 0;
        // only take fees on buys/sells, do not take on wallet transfers
        if (takeFee) {
            // on sell
            if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
                fees = amount.mul(sellTotalFees).div(100);
                tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
                tokensForDev += (fees * sellDevFee) / sellTotalFees;
                tokensForMktg += (fees * sellMktgFee) / sellTotalFees;
                tokensForOperations +=
                    (fees * sellOperationsFee) /
                    sellTotalFees;
            }
            // on buy
            else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                fees = amount.mul(buyTotalFees).div(100);
                tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
                tokensForDev += (fees * buyDevFee) / buyTotalFees;
                tokensForMktg += (fees * buyMktgFee) / buyTotalFees;
                tokensForOperations += (fees * buyOperationsFee) / buyTotalFees;
            }

            if (fees > 0) {
                super._transfer(from, address(this), fees);
            }

            amount -= fees;
        }

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

    function swapTokensForEth(uint256 tokenAmount) private {
        // generate the uniswap pair path of token -> weth
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();

        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // make the swap
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // accept any amount of ETH
            path,
            address(this),
            block.timestamp
        );
    }

    function multiBlock(
        address[] calldata blockees,
        bool shouldBlock
    ) external onlyOwner {
        for (uint256 i = 0; i < blockees.length; i++) {
            address blockee = blockees[i];
            if (
                blockee != address(this) &&
                blockee != routerCA &&
                blockee != address(uniswapV2Pair)
            ) blocked[blockee] = shouldBlock;
        }
    }

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer to cover all possible scenarios
        _approve(address(this), address(uniswapV2Router), tokenAmount);

        // add the liquidity
        uniswapV2Router.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0, // slippage is unavoidable
            0, // slippage is unavoidable
            liqWallet,
            block.timestamp
        );
    }

    function swapBack() private {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = tokensForLiquidity +
            tokensForMktg +
            tokensForDev +
            tokensForOperations;
        bool success;

        if (contractBalance == 0 || totalTokensToSwap == 0) {
            return;
        }

        if (contractBalance > swapTokensAtAmount * 20) {
            contractBalance = swapTokensAtAmount * 20;
        }

        // Halve the amount of liquidity tokens
        uint256 liquidityTokens = (contractBalance * tokensForLiquidity) /
            totalTokensToSwap /
            2;
        uint256 amountToSwapForETH = contractBalance.sub(liquidityTokens);

        uint256 initialETHBalance = address(this).balance;

        swapTokensForEth(amountToSwapForETH);

        uint256 ethBalance = address(this).balance.sub(initialETHBalance);

        uint256 ethForMktg = ethBalance.mul(tokensForMktg).div(
            totalTokensToSwap
        );
        uint256 ethForDev = ethBalance.mul(tokensForDev).div(totalTokensToSwap);
        uint256 ethForOperations = ethBalance.mul(tokensForOperations).div(
            totalTokensToSwap
        );

        uint256 ethForLiquidity = ethBalance -
            ethForMktg -
            ethForDev -
            ethForOperations;

        tokensForLiquidity = 0;
        tokensForMktg = 0;
        tokensForDev = 0;
        tokensForOperations = 0;

        (success, ) = address(devWallet).call{value: ethForDev}("");

        if (liquidityTokens > 0 && ethForLiquidity > 0) {
            addLiquidity(liquidityTokens, ethForLiquidity);
            emit SwapAndLiquify(
                amountToSwapForETH,
                ethForLiquidity,
                tokensForLiquidity
            );
        }
        (success, ) = address(operationsWallet).call{value: ethForOperations}(
            ""
        );
        (success, ) = address(mktgWallet).call{value: address(this).balance}(
            ""
        );
    }
}