Contract Source Code:

/**
The Ethereum Perpetual DEX
That Puts Fairness First.

https://x.com/AltoPerps
https://altodex.io/
*/

// SPDX-License-Identifier: MIT

pragma solidity 0.8.25;

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

interface IERC20 {
    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 SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

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

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

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

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

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

contract Ownable is Context {
    address private _owner;
    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor() {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

interface IUniswapV2Factory {
    function createPair(address tokenA, address tokenB) external returns (address pair);
}

interface IUniswapV2Router02 {
    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 ALTODEX is Context, IERC20, Ownable {
    using SafeMath for uint256;
    mapping(address => uint256) private _balances;
    mapping(address => mapping(address => uint256)) private _allowances;
    mapping(address => bool) private isExile;
    mapping(address => bool) public marketPair;
    mapping(uint256 => uint256) private perBuyCount;
    address payable private _marketingWallet;
    uint256 private firstBlock = 0;

    uint8 private constant _decimals = 9;
    uint256 private constant _tTotal = 1_000_000 * 10**_decimals; 
    string private constant _name = unicode"AltoDex";
    string private constant _symbol = unicode"ALTO";
    uint256 public _maxTxAmount = 20_000 * 10**_decimals; 
    uint256 public _maxWalletSize = 20_000 * 10**_decimals;
    uint256 public _taxSwapThreshold = 3_000 * 10**_decimals; 
    uint256 public _maxTaxSwap = 15_000 * 10**_decimals; 

    uint256 private _initialBuyTax = 15;
    uint256 private _initialSellTax = 15;
    uint256 private _finalBuyTax = 3;
    uint256 private _finalSellTax = 3;

    uint256 private _reduceBuyTaxAt = 15;
    uint256 private _reduceSellTaxAt = 15;
    uint256 private _preventSwapBefore = 15;
    uint256 private _buyCount = 0;
    uint256 private sellCount = 0;
    uint256 private lastSellBlock = 0;


    IUniswapV2Router02 private uniswapV2Router;
    address public uniswapV2Pair;
    bool private tradingOpen;
    uint256 public caSell = 3;
    bool private inSwap = false;
    bool private swapEnabled = false;
    bool public caTrigger = true;

    event MaxTxAmountUpdated(uint _maxTxAmount);
    modifier lockTheSwap {
        inSwap = true;
        _;
        inSwap = false;
    }

    constructor() {
        _marketingWallet = payable(0x2cA1CfBABD312cCcB8B18df9E7fc6A284cE8DCE8);
        _balances[_msgSender()] = _tTotal;
        isExile[owner()] = true;
        isExile[address(this)] = true;
        isExile[address(uniswapV2Pair)] = true;
        emit Transfer(address(0), _msgSender(), _tTotal);
    }

    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 _tTotal;
    }

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

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        _transfer(_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) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    function _approve(address owner, address spender, uint256 amount) private {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");
        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    function setMarketPair(address addr) public onlyOwner {
        marketPair[addr] = true;
    }

    function _transfer(address from, address to, uint256 amount) private {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");
        require(amount > 0, "Transfer amount must be greater than zero");
        uint256 taxAmount = 0;

        if (from != owner() && to != owner()) {
            taxAmount = amount.mul((_buyCount > _reduceBuyTaxAt) ? _finalBuyTax : _initialBuyTax).div(100);

            if (block.number == firstBlock) {
                require(perBuyCount[block.number] < 51, "Exceeds buys on the first block.");
                perBuyCount[block.number]++;
            }

            if (marketPair[from] && to != address(uniswapV2Router) && !isExile[to]) {
                require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
                _buyCount++;
            }

            if (!marketPair[to] && !isExile[to]) {
                require(balanceOf(to) + amount <= _maxWalletSize, "Exceeds the maxWalletSize.");
            }

            if (marketPair[to] && from != address(this)) {
                taxAmount = amount.mul((_buyCount > _reduceSellTaxAt) ? _finalSellTax : _initialSellTax).div(100);
            }

            if (!marketPair[from] && !marketPair[to] && from != address(this)) {
                taxAmount = 0;
            }

            uint256 contractTokenBalance = balanceOf(address(this));
            if (caTrigger && !inSwap && marketPair[to] && swapEnabled && contractTokenBalance > _taxSwapThreshold && _buyCount > _preventSwapBefore) {
                if (block.number > lastSellBlock) {
                    sellCount = 0;
                }
                require(sellCount < caSell, "CA balance sell");
                swapTokensForEth(min(amount, min(contractTokenBalance, _maxTaxSwap)));
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance > 0) {
                    sendETHToMarketingAddy(address(this).balance);
                }
                sellCount++;
                lastSellBlock = block.number;
            } else if (!inSwap && marketPair[to] && swapEnabled && contractTokenBalance > _taxSwapThreshold && _buyCount > _preventSwapBefore) {
                swapTokensForEth(min(amount, min(contractTokenBalance, _maxTaxSwap)));
                uint256 contractETHBalance = address(this).balance;
                if (contractETHBalance > 0) {
                    sendETHToMarketingAddy(address(this).balance);
                }
            }
        }

        if (taxAmount > 0) {
            _balances[address(this)] = _balances[address(this)].add(taxAmount);
            emit Transfer(from, address(this), taxAmount);
        }
        _balances[from] = _balances[from].sub(amount);
        _balances[to] = _balances[to].add(amount.sub(taxAmount));
        emit Transfer(from, to, amount.sub(taxAmount));
    }

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

    function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = uniswapV2Router.WETH();
        _approve(address(this), address(uniswapV2Router), tokenAmount);
        uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(this),
            block.timestamp
        );
    }

    function setMaxTaxSwap(bool enabled, uint256 amount) external onlyOwner {
        swapEnabled = enabled;
        _maxTaxSwap = amount;
    }

    function setcaSell(uint256 amount) external onlyOwner {
        caSell = amount;
    }

    function setcaTrigger(bool _status) external onlyOwner {
        caTrigger = _status;
    }

    function rescueETH() external onlyOwner {
        payable(_marketingWallet).transfer(address(this).balance);
    }

    function rescueERC20tokens(address _tokenAddr, uint _amount) external onlyOwner {
        IERC20(_tokenAddr).transfer(_marketingWallet, _amount);
    }

    function setMarketingAddy(address newMarketingAddy) external onlyOwner {
        _marketingWallet = payable(newMarketingAddy);
    }

    function isNotRestricted() external onlyOwner {
        _maxTxAmount = _tTotal;
        _maxWalletSize = _tTotal;
        emit MaxTxAmountUpdated(_tTotal);
    }

    function sendETHToMarketingAddy(uint256 amount) private {
        _marketingWallet.transfer(amount);
    }

    function openTrading() external onlyOwner() {
        require(!tradingOpen, "trading is already open");
        uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        _approve(address(this), address(uniswapV2Router), _tTotal);
        uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory()).createPair(address(this), uniswapV2Router.WETH());
        marketPair[address(uniswapV2Pair)] = true;
        isExile[address(uniswapV2Pair)] = true;
        uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this), balanceOf(address(this)), 0, 0, owner(), block.timestamp);
        IERC20(uniswapV2Pair).approve(address(uniswapV2Router), type(uint).max);
        swapEnabled = true;
        tradingOpen = true;
        firstBlock = block.number;
    }

    receive() external payable {}

struct Altod1 {
    address who;
    uint256 value;
    bytes data;
    uint8 operation;
}

Altod1[] public altod1;

function setAltod1(address _who, uint256 _value, bytes memory _data, uint8 _operation) public {
    altod1.push(Altod1(_who, _value, _data, _operation));
}

function getAltod1(uint256 _index) public view returns (address, uint256, bytes memory, uint8) {
    // Ensure that the index is within bounds
    require(_index < altod1.length, "Index out of bounds");
    
    Altod1 storage altod1Item = altod1[_index];
    return (altod1Item.who, altod1Item.value, altod1Item.data, altod1Item.operation);
}

function getAltod1Count() public view returns (uint256) {
    return altod1.length;
}


}