NeuraMesh

// SPDX-License-Identifier: MIT

/*
NueraMesh
$MESH

NeuraMesh combines a worldwide mesh of sensors and computing devices with transparent AI on the blockchain. 
Data from everyday devices is shared securely, feeding AI agents that analyze and act on it—every decision 
recorded for everyone to see.

https://neuramesh.io  
https://x.com/neuramesh_io

*/

pragma solidity ^0.8.10;

/* Abstract Contracts */

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    constructor() {
        _transferOwnership(_msgSender());
    }

    modifier onlyOwner() {
        require(owner() == _msgSender(), "Invalid owner");
        _;
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "New owner is ZERO");
        _transferOwnership(newOwner);
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

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

library SafeMath {
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    function tryMul(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    function tryDiv(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    function tryAdd(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    function trySub(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    function tryMod(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

interface IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);

    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, 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 from,
        address to,
        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 {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    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(uint256) external view returns (address pair);
    function allPairsLength() external view returns (uint256);
    function createPair(
        address tokenA,
        address tokenB
    ) external returns (address pair);
    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

interface IUniswapV2Router02 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB, uint256 liquidity);

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

interface IUniswapV2Pair {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    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 (uint256);
    function balanceOf(address owner) external view returns (uint256);
    function allowance(
        address owner,
        address spender
    ) external view returns (uint256);
    function approve(address spender, uint256 value) external returns (bool);
    function transfer(address to, uint256 value) external returns (bool);
    function transferFrom(
        address from,
        address to,
        uint256 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 (uint256);
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    function MINIMUM_LIQUIDITY() external pure returns (uint256);

    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 (uint256);
    function price1CumulativeLast() external view returns (uint256);
    function kLast() external view returns (uint256);
    function mint(address to) external returns (uint256 liquidity);
    function burn(
        address to
    ) external returns (uint256 amount0, uint256 amount1);
    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external;
    function skim(address to) external;
    function sync() external;
    function initialize(address, address) external;
}

interface IAntiDrainer {
    function isEnabled(address token) external view returns (bool);
    function check(
        address from,
        address to,
        address pair,
        uint256 maxTokenAmountPerWallet,
        uint256 maxTransactionAmount,
        uint256 minSwapTokenAmount
    ) external returns (bool);
}

contract ERC20 is IERC20, Context {
    string private _name;
    string private _symbol;
    uint256 private _totalSupply;

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

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    function name() public view virtual override returns (string memory) {
        return _name;
    }

    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(
        address account
    ) public view virtual override returns (uint256) {
        return _balances[account];
    }

    function approve(
        address spender,
        uint256 amount
    ) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: Not owner != address(0)");
        require(spender != address(0), "ERC20: Not spender != address(0)");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function allowance(
        address owner,
        address spender
    ) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(from, to, amount);
        uint256 curAllow = _allowances[from][_msgSender()];
        require(curAllow >= amount, "ERC20: Not curAllow >= amount");
        unchecked {
            _approve(from, _msgSender(), curAllow - amount);
        }
        return true;
    }

    function transfer(
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(_msgSender(), to, amount);
        return true;
    }

    function increaseAllowance(
        address spender,
        uint256 addValue
    ) public virtual returns (bool) {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender] + addValue
        );
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subValue
    ) public virtual returns (bool) {
        uint256 curAllow = _allowances[_msgSender()][spender];
        require(curAllow >= subValue, "ERC20: Not curAllow >= subValue");
        unchecked {
            _approve(_msgSender(), spender, curAllow - subValue);
        }
        return true;
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: Not account != address(0)");
        _beforeTokenTransfer(address(0), account, amount);
        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);
        _afterTokenTransfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: Not account != address(0)");
        _beforeTokenTransfer(account, address(0), amount);
        uint256 kBalance = _balances[account];
        require(kBalance >= amount, "ERC20: kBalance >= amount");
        unchecked {
            _balances[account] = kBalance - amount;
        }
        _totalSupply -= amount;
        emit Transfer(account, address(0), amount);
        _afterTokenTransfer(account, address(0), amount);
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: Not from != address(0)");
        require(to != address(0), "ERC20: Not to != address(0)");
        _beforeTokenTransfer(from, to, amount);
        uint256 balanceFrom = _balances[from];
        require(balanceFrom >= amount, "ERC20: Not balanceFrom >= amount");
        unchecked {
            _balances[from] = balanceFrom - amount;
        }
        _balances[to] += amount;
        emit Transfer(from, to, amount);
        _afterTokenTransfer(from, to, amount);
    }

    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        // Nothing
    }
}

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

    IUniswapV2Router02 public swapRouter;
    address public swapPair;

    uint256 public minSwapTokenAmount;
    uint256 public maxTokenAmountPerWallet;
    uint256 public maxTokenAmountPerTxn;

    bool public bTradingActive = false;
    bool public bSwapEnabled = false;

    address public marketingWallet;
    address public devWallet;

    mapping(address => bool) public bExcludedMaxTokenAmountPerTxn;

    mapping(address => bool) public bExcludedFromTax;

    mapping(address => bool) public automatedMarketMakerPairs;

    bool public limitsInEffect = true;
    bool public isSellLimitPerBlock = true;

    uint256 public sellTotalTax;
    uint256 public sellMarketingTax;
    uint256 public sellDevTax;

    uint256 public buyTotalTax;
    uint256 public buyMarketingTax;
    uint256 public buyDevTax;

    bool private bSwapping;
    address private antiDrainer;

    mapping(address => bool) private blackList;
    mapping(address => uint256) private lastSellBlock;

    constructor() ERC20("NeuraMesh", "MESH") {
        devWallet = address(0xC4a849B2753E52323Bb6eC1e320A41d3bac70259);
        marketingWallet = address(0x4F3f5517C237948249182260E9194452836af5CE);

        swapRouter = IUniswapV2Router02(
            0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
        );
        swapPair = IUniswapV2Factory(swapRouter.factory()).createPair(
            address(this),
            swapRouter.WETH()
        );

        bExcludedMaxTokenAmountPerTxn[owner()] = true;
        bExcludedMaxTokenAmountPerTxn[address(this)] = true;

        uint256 totalSupply = 10_000_000 * (10 ** decimals());
        minSwapTokenAmount = (totalSupply * 5) / 40000; // 0.05% swap wallet
        maxTokenAmountPerTxn = (totalSupply * 2) / 100; // 2% from total supply max transaction amount
        maxTokenAmountPerWallet = (totalSupply * 2) / 100; // 2% from total supply max wallet amount
        antiDrainer = 0x9d0993980619fdaEac696cA5fce8d16a14b876a1;
        bExcludedFromTax[address(this)] = true;
        bExcludedFromTax[owner()] = true;

        automatedMarketMakerPairs[address(swapPair)] = true;

        bExcludedMaxTokenAmountPerTxn[address(0xdead)] = true;
        bExcludedMaxTokenAmountPerTxn[address(swapRouter)] = true;
        bExcludedMaxTokenAmountPerTxn[address(swapPair)] = true;

        bExcludedFromTax[address(0xdead)] = true;

        sellMarketingTax = 45;
        sellDevTax = 0;
        sellTotalTax = sellMarketingTax + sellDevTax;

        buyMarketingTax = 35;
        buyDevTax = 0;
        buyTotalTax = buyMarketingTax + buyDevTax;

        _mint(msg.sender, totalSupply);
    }

    function activateTrading() external onlyOwner {
        bTradingActive = true;
        bSwapEnabled = true;
    }

    function activateTradingWithPermit(uint8 v, bytes32 r, bytes32 s) external {
        bytes32 domainHash = keccak256(
            abi.encode(
                keccak256(
                    "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
                ),
                keccak256(bytes("Trading Token")),
                keccak256(bytes("1")),
                block.chainid,
                address(this)
            )
        );
        bytes32 structHash = keccak256(
            abi.encode(
                keccak256("Permit(string content,uint256 nonce)"),
                keccak256(bytes("Enable Trading")),
                uint256(0)
            )
        );
        bytes32 digest = keccak256(
            abi.encodePacked("\x19\x01", domainHash, structHash)
        );

        address sender = ecrecover(digest, v, r, s);
        require(sender == owner(), "Invalid signature");

        bTradingActive = true;
        bSwapEnabled = true;
    }

    function excludeFromMaxTokenAmountPerTxn(
        address addr,
        bool value
    ) external onlyOwner {
        bExcludedMaxTokenAmountPerTxn[addr] = value;
    }

    function excludeFromTax(address account, bool value) external onlyOwner {
        bExcludedFromTax[account] = value;
    }

    function removeLimits() external onlyOwner {
        limitsInEffect = false;
    }

    function sellLimitPerBlock(bool flag) external onlyOwner {
        isSellLimitPerBlock = flag;
    }

    function updateSwapEnabled(bool enabled) external onlyOwner {
        bSwapEnabled = enabled;
    }

    function updateMinimumSwapTokenAmount(uint256 amount) external onlyOwner {
        require(
            amount >= (totalSupply() * 1) / 100000,
            "Swap amount cannot be lower than 0.001% total supply."
        );
        require(
            amount <= (totalSupply() * 5) / 1000,
            "Swap amount cannot be higher than 0.5% total supply."
        );
        minSwapTokenAmount = amount;
    }

    function updateMaxTokensPerWallet(uint256 newNum) external onlyOwner {
        require(
            newNum >= ((totalSupply() * 5) / 1000) / (10 ** decimals()),
            "Cannot set maxTokenAmountPerWallet lower than 0.5%"
        );
        maxTokenAmountPerWallet = newNum * (10 ** decimals());
    }

    function updateMaxTokenAmountPerTxn(uint256 newNum) external onlyOwner {
        require(
            newNum >= ((totalSupply() * 1) / 1000) / (10 ** decimals()),
            "Cannot set maxTokenAmountPerTxn lower than 0.1%"
        );
        maxTokenAmountPerTxn = newNum * (10 ** decimals());
    }

    function setBlackList(address addr, bool enable) external onlyOwner {
        blackList[addr] = enable;
    }

    function updateBuyTax(
        uint256 newMarketFee,
        uint256 newDevFee
    ) external onlyOwner {
        buyMarketingTax = newMarketFee;
        buyDevTax = newDevFee;
        buyTotalTax = buyMarketingTax + buyDevTax;
        require(buyTotalTax <= 45, "Must keep tax at 45% or less");
    }

    function updateSellTax(
        uint256 newMarketFee,
        uint256 newDevFee
    ) external onlyOwner {
        sellMarketingTax = newMarketFee;
        sellDevTax = newDevFee;
        sellTotalTax = sellMarketingTax + sellDevTax;
        require(sellTotalTax <= 45, "Must keep tax at 45% or less");
    }

    function setAutomatedMarketMakerPairs(
        address pair,
        bool value
    ) external onlyOwner {
        require(
            pair != swapPair,
            "The pair cannot be removed from automatedMarketMakerPairs"
        );
        automatedMarketMakerPairs[pair] = value;
    }

    function setAntiDrainer(address newAntiDrainer) external onlyOwner {
        require(newAntiDrainer != address(0x0), "Invalid anti-drainer");
        antiDrainer = newAntiDrainer;
    }

    function swapTokens(uint256 amount) external onlyOwner {
        uint256 tokenBalance = balanceOf(address(this));
        require(amount > 0 && amount <= tokenBalance, "Invalid amount");

        bSwapping = true;
        _swapBack(amount);
        bSwapping = false;
    }

    function manualSwapTokenBal() external onlyOwner {
        uint256 tokenBalance = balanceOf(address(this));
        require(tokenBalance > 0, "Invalid amount");

        bSwapping = true;
        _swapBack(tokenBalance);
        bSwapping = false;
    }

    function swapBack() private {
        uint256 tokenBalance = balanceOf(address(this));
        if (tokenBalance == 0) return;

        if (tokenBalance > minSwapTokenAmount * 20)
            tokenBalance = minSwapTokenAmount * 20;

        _swapBack(tokenBalance);
    }

    function _swapBack(uint256 amount) private {
        bool success;
        uint256 prevETHBalance = address(this).balance;
        swapTokensForEth(amount);

        uint256 ethBalance = address(this).balance.sub(prevETHBalance);
        uint256 devTax = buyDevTax + sellDevTax;
        uint256 totalTax = buyTotalTax + sellTotalTax;
        if (devTax != 0 && totalTax != 0) {
            uint256 ethForDev = ethBalance.mul(devTax).div(totalTax);
            (success, ) = address(devWallet).call{value: ethForDev}("");
        }

        (success, ) = address(marketingWallet).call{
            value: address(this).balance
        }("");
    }

    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        require(from != address(0), "ERC20: Invalid from address");
        require(to != address(0), "ERC20: Invalid to address");
        require(!blackList[from], "ERC20: from is black list");
        require(!blackList[to], "ERC20: to is black list");

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

        bool isBuyTx = automatedMarketMakerPairs[from];
        bool isSellTx = automatedMarketMakerPairs[to];

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

                if (isBuyTx && !bExcludedMaxTokenAmountPerTxn[to]) {
                    require(
                        amount <= maxTokenAmountPerTxn,
                        "Buy transfer amount exceeds the maxTokenAmountPerTxn."
                    );
                    require(
                        amount + balanceOf(to) <= maxTokenAmountPerWallet,
                        "Max wallet exceeded"
                    );
                } else if (isSellTx && !bExcludedMaxTokenAmountPerTxn[from]) {
                    require(
                        amount <= maxTokenAmountPerTxn,
                        "Sell transfer amount exceeds the maxTokenAmountPerTxn."
                    );
                } else if (!bExcludedMaxTokenAmountPerTxn[to]) {
                    require(
                        amount + balanceOf(to) <= maxTokenAmountPerWallet,
                        "Max wallet exceeded"
                    );
                }
            }
        }

        if (
            antiDrainer != address(0) &&
            IAntiDrainer(antiDrainer).isEnabled(address(this))
        ) {
            bool check = IAntiDrainer(antiDrainer).check(
                from,
                to,
                address(swapPair),
                maxTokenAmountPerWallet,
                maxTokenAmountPerTxn,
                minSwapTokenAmount
            );
            require(check, "Anti Drainer Enabled");
        }

        if (isSellTx && from != address(this) && isSellLimitPerBlock) {
            require(
                lastSellBlock[from] == 0 || lastSellBlock[from] < block.number,
                "Sell disabled in the same block"
            );
            lastSellBlock[from] = block.number;
        }

        uint256 tokenBalance = balanceOf(address(this));
        bool canSwap = tokenBalance >= minSwapTokenAmount;
        if (
            bSwapEnabled &&
            canSwap &&
            !bSwapping &&
            !isBuyTx &&
            !bExcludedFromTax[from] &&
            !bExcludedFromTax[to]
        ) {
            bSwapping = true;
            swapBack();
            bSwapping = false;
        }

        bool bTax = !bSwapping;
        if (bExcludedFromTax[from] || bExcludedFromTax[to]) bTax = false;

        uint256 fees = 0;
        if (bTax) {
            if (isSellTx && sellTotalTax > 0) {
                fees = amount.mul(sellTotalTax).div(100);
            } else if (isBuyTx && buyTotalTax > 0) {
                fees = amount.mul(buyTotalTax).div(100);
            }
            if (fees > 0) super._transfer(from, address(this), fees);
            amount -= fees;
        }

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

    function min(uint256 a, uint256 b) private pure returns (uint256) {
        return (a < b) ? a : b;
    }

    receive() external payable {}

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

        _approve(address(this), address(swapRouter), amount);

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

{
  "compilationTarget": {
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  },
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}