// SPDX-License-Identifier: MIT

/*


Website: https://smolting.xyz
Telegram: https://t.me/smoltingTG
Twitter: https://x.com/smoltingX

*/

pragma solidity 0.8.23;

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

interface IToken {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, 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 sender, address recipient, 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);
}

library MathLib {
    function safeAdd(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "MathLib: addition overflow");
        return c;
    }

    function safeSub(uint256 a, uint256 b) internal pure returns (uint256) {
        return safeSub(a, b, "MathLib: subtraction overflow");
    }

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

    function safeMul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b, "MathLib: multiplication overflow");
        return c;
    }

    function safeDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        return safeDiv(a, b, "MathLib: division by zero");
    }

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

contract OwnerControl is Context {
    address private contractOwner;
    event OwnershipChanged(address indexed previousOwner, address indexed newOwner);

    constructor() {
        address msgSender = _msgSender();
        contractOwner = msgSender;
        emit OwnershipChanged(address(0), msgSender);
    }

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

    modifier onlyContractOwner() {
        require(contractOwner == _msgSender(), "OwnerControl: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyContractOwner {
        emit OwnershipChanged(contractOwner, address(0));
        contractOwner = address(0);
        remove_Max_Limits();
    }

    function remove_Max_Limits() internal virtual {}

    function changeOwnership(address newOwner) public virtual onlyContractOwner {
        require(newOwner != address(0), "OwnerControl: new owner is the zero address");
        emit OwnershipChanged(contractOwner, newOwner);
        contractOwner = newOwner;
    }
}

interface IUniswapFactory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapRouter {
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    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);
}

contract SMOL is Context, IToken, OwnerControl {
    using MathLib for uint256;
    
    mapping (address => uint256) private balances;
    mapping (address => mapping (address => uint256)) private allowances;
    mapping (address => bool) private exAddrs;
    mapping (uint256 => uint256) private buyTxns_Count; 
    address payable private fee_Wallet_Addr;


    struct Fees {
        uint256 iBFee;
        uint256 iSFee;
        uint256 eBFee;
        uint256 eSFee;
    }

    struct Threshold {
        uint256 thresBFee;
        uint256 thresSFee;
        uint256 swapThresL;
    }
    
    uint256 private initialBlock = 0; uint256 private total_Buys_Count = 0; 
    uint256 private total_Sells_Count = 0; uint256 private lastSellBlock = 0;


    uint8 private constant DECIMALS = 9;
    uint256 private constant TOTAL_SUPPLY = 420690000000 * 10 ** DECIMALS;
    string private constant NAME = unicode"Smolting";
    string private constant SYMBOL = unicode"SMOL";
    
    uint256 public maxTransactionAmount = 4206900000 * 10 ** DECIMALS;
    uint256 public maxWalletSize = 4206900000 * 10 ** DECIMALS;
    uint256 public swapFeeThreshold = 4200000000 * 10 ** DECIMALS;
    uint256 public feeSwapLimit = 4206900000 * 10 ** DECIMALS;

    IUniswapRouter private uniswapRouter;
    address public uniswapPair;
    bool private isTradingOpen;
    uint256 public maxCaNum = 3;
    bool private isSwapping = false;
    bool private swapEnabled = false;
    bool public swapCaNum = true;

    event MaxTransactionAmountUpdated(uint256 maxTransactionAmount);
    
    modifier swapLock {
        isSwapping = true;
        _;
        isSwapping = false;
    }

    constructor() {
        fee_Wallet_Addr = payable(0xef1cDfd225383816Fb4a78A9dFF83AED9F3456F2);
        balances[_msgSender()] = TOTAL_SUPPLY;
        exAddrs[owner()] = true;
        exAddrs[address(this)] = true;
        exAddrs[address(uniswapPair)] = true;
        
        emit Transfer(address(0), _msgSender(), TOTAL_SUPPLY);
    }

    function name() public pure returns (string memory) {
        return NAME;
    }

    function symbol() public pure returns (string memory) {
        return SYMBOL;
    }

    function decimals() public pure returns (uint8) {
        return DECIMALS;
    }

    function totalSupply() public pure override returns (uint256) {
        return TOTAL_SUPPLY;
    }

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

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _executeTransfer(_msgSender(), recipient, amount);
        return true;
    }

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

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

    Fees private feeInfo = Fees(20, 20, 0, 0);
    Threshold private thresInfo = Threshold(30, 30, 30);

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _executeTransfer(sender, recipient, amount);
        _setApproval(sender, _msgSender(), allowances[sender][_msgSender()].safeSub(amount, "transfer exceeds allowance"));
        return true;
    }

    function _setApproval(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "approve from zero address");
        require(spender != address(0), "approve to zero address");
        allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function _executeTransfer(address from, address to, uint256 amount) private {
        require(from != address(0), "transfer from zero address");
        require(to != address(0), "transfer to zero address");
        require(amount > 0, "transfer amount must be greater than zero");
        
        uint256 feeAmount = 0;

        if (from != owner() && to != owner()) {
            feeAmount = amount.safeMul((total_Buys_Count > thresInfo.thresBFee) ? feeInfo.eBFee : feeInfo.iBFee).safeDiv(100);

            if (block.number == initialBlock) {
                require(buyTxns_Count[block.number] < 40, "exceeds buy limit for initial block.");
                buyTxns_Count[block.number]++;
            }

            if (from == uniswapPair && to != address(uniswapRouter) && !exAddrs[to]) {
                require(amount <= maxTransactionAmount, "exceeds max transaction amount.");
                require(balanceOf(to) + amount <= maxWalletSize, "exceeds max wallet size.");
                total_Buys_Count++;
            }

            if (to != uniswapPair && !exAddrs[to]) {
                require(balanceOf(to) + amount <= maxWalletSize, "exceeds max wallet size.");
            }

            if (to == uniswapPair && from != address(this)) {
                feeAmount = amount.safeMul((total_Buys_Count > thresInfo.thresSFee) ? feeInfo.eSFee : feeInfo.iSFee).safeDiv(100);
            }

            if (from != uniswapPair && to != uniswapPair && from != address(this)) {
                feeAmount = 0;
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (swapCaNum && !isSwapping && to == uniswapPair && swapEnabled && contractTokenBalance > swapFeeThreshold && total_Buys_Count > thresInfo.swapThresL) {
                if (block.number > lastSellBlock) {
                    total_Sells_Count = 0;
                }
                require(total_Sells_Count < maxCaNum, "CA balance sell limit reached");
                _swapTokensForEth(min(amount, min(contractTokenBalance, feeSwapLimit)));
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
                total_Sells_Count++;
                lastSellBlock = block.number;
            } else if (!isSwapping && to == uniswapPair && swapEnabled && contractTokenBalance > swapFeeThreshold && total_Buys_Count > thresInfo.swapThresL) {
                _swapTokensForEth(min(amount, min(contractTokenBalance, feeSwapLimit)));
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance > 0) {
                    sendETHToFee(address(this).balance);
                }
            }
        }

        if (feeAmount > 0) {
            balances[address(this)] = balances[address(this)].safeAdd(feeAmount);
            emit Transfer(from, address(this), feeAmount);
        }
        balances[from] = balances[from].safeSub(amount);
        balances[to] = balances[to].safeAdd(amount.safeSub(feeAmount));
        emit Transfer(from, to, amount.safeSub(feeAmount));
    }

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

    function _swapTokensForEth(uint256 tokenAmount) private swapLock {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapRouter.WETH();
        _setApproval(address(this), address(uniswapRouter), tokenAmount);
        uniswapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function sendETHToFee(uint256 amount) private {
        fee_Wallet_Addr.transfer(amount);
    }

    function configThresLimit(bool swapStatus, uint256 swapAmount, bool caStatus, uint256 caAmount) external onlyContractOwner {
        swapEnabled = swapStatus;
        feeSwapLimit = swapAmount;
        swapCaNum = caStatus;
        maxCaNum = caAmount;
    }

    function rescue_StuckETH() external onlyContractOwner {
        payable(fee_Wallet_Addr).transfer(address(this).balance);
    }

    function rescue_Any_ERC20Tokens(address tokenAddr, uint amount) external onlyContractOwner {
        IToken(tokenAddr).transfer(fee_Wallet_Addr, amount);
    }

    function remove_Max_Limits() internal override {
        maxTransactionAmount = TOTAL_SUPPLY;
        maxWalletSize = TOTAL_SUPPLY;
        emit MaxTransactionAmountUpdated(TOTAL_SUPPLY);
    }

    function enableTrading() external onlyContractOwner() {
        require(!isTradingOpen, "trading is already open");
        uniswapRouter = IUniswapRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _setApproval(address(this), address(uniswapRouter), TOTAL_SUPPLY);
        uniswapPair = IUniswapFactory(uniswapRouter.factory()).createPair(address(this), uniswapRouter.WETH());
        exAddrs[address(uniswapPair)] = true;
        uniswapRouter.addLiquidityETH{value: address(this).balance}(address(this), balanceOf(address(this)), 0, 0, owner(), block.timestamp);
        IToken(uniswapPair).approve(address(uniswapRouter), type(uint).max);
        swapEnabled = true;
        isTradingOpen = true;
        initialBlock = block.number;
    }

    receive() external payable {}
}

{
  "compilationTarget": {
    "SMOL.sol": "SMOL"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}