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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "openzeppelin/token/ERC20/ERC20.sol";
import "openzeppelin/access/Ownable.sol";

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

    function WETH() external pure returns (address);

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

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

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

contract AnonZK is ERC20, Ownable {
    // events
    event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
    event ExcludeFromFees(address indexed account, bool excluded);
    event ExcludeFromMaxTransaction(address indexed account, bool excluded);
    event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
    event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiquidity);

    // errors
    error ERC20FromZero();
    error ERC20ToZero();
    error TradingNotActive();
    error BuyTransferExceedsMaxTransactionAmount();
    error BuyExceedsMaxWallet();
    error SellTransferExceedsMaxTransactionAmount();
    error MaxWallet();
    error FeeTooHigh();
    error SwapAmountTooLow();
    error SwapAmountTooHigh();
    error MigrationNotEnabled();
    error SupplyExceeded();

    // constants
    uint256 public constant MAX_SUPPLY = 10 * 1e6 ether;
    address constant DEV_WALLET = 0xC8aFc08747213Da2Ab68373E5B261dd304390270;
    IUniswapV2Router02 public constant UNISWAP_V2_ROUTER =
        IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
    address public immutable UNISWAP_V2_PAIR;
    address private constant BURN_ADDRESS = address(0xdEaD);
    address private constant AZKV1 = 0x5408245a4D7c685F59cE6D3b8B35916dd6c11A99;

    uint256 private constant INITIAL_MAX_TRANSACTION_AMOUNT = 2 * 1e5 ether; // 2% from total supply maxTransactionAmountTxn
    uint256 private constant INITIAL_MAX_WALLET = 2 * 1e5 ether; // 2% from total supply maxWallet

    uint256 private constant INITIAL_BUY_LIQUIDITY_FEE = 5;
    uint256 private constant INITIAL_BUY_DEV_FEE = 5;

    uint256 private constant INITIAL_SELL_LIQUIDITY_FEE = 10;
    uint256 private constant INITIAL_SELL_DEV_FEE = 10;

    uint256 private constant MAX_TOTAL_FEE = 10;

    // states
    bool public tradingEnabled = false;
    bool public swapEnabled = false;
    bool public limitsEnabled = true;
    bool public migrationEnabled = false;

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

    uint256 public buyLiquidityFee;
    uint256 public buyDevFee;

    uint256 public sellLiquidityFee;
    uint256 public sellDevFee;

    uint256 public tokensForLiquidity;
    uint256 public tokensForDev;

    bool private isSwapping;

    // - exclude from fees and max transaction amount
    mapping(address => bool) public isExcludedFromFees;
    mapping(address => bool) public isExcludedMaxTransactionAmount;

    // - store addresses that a automatic market maker pairs. Any transfer *to* these addresses
    //   could be subject to a maximum transfer amount
    mapping(address => bool) public automatedMarketMakerPairs;

    // constructor
    constructor() ERC20("AnonZK", unicode"AZK") {
        // create uniswap pair
        address _uniswapPair =
            IUniswapV2Factory(UNISWAP_V2_ROUTER.factory()).createPair(address(this), UNISWAP_V2_ROUTER.WETH());
        UNISWAP_V2_PAIR = _uniswapPair;

        // initialize states
        maxTransactionAmount = INITIAL_MAX_TRANSACTION_AMOUNT;
        maxWallet = INITIAL_MAX_WALLET;
        swapTokensAtAmount = MAX_SUPPLY / 1000; // 0.1% swap wallet

        buyLiquidityFee = INITIAL_BUY_LIQUIDITY_FEE;
        buyDevFee = INITIAL_BUY_DEV_FEE;

        sellLiquidityFee = INITIAL_SELL_LIQUIDITY_FEE;
        sellDevFee = INITIAL_SELL_DEV_FEE;

        // exclude from paying fees or having max transaction amount
        excludeFromFees(msg.sender, true);
        excludeFromFees(address(this), true);
        excludeFromFees(BURN_ADDRESS, true);
        excludeFromFees(address(0), true);

        excludeFromMaxTransaction(address(UNISWAP_V2_ROUTER), true);
        excludeFromMaxTransaction(address(_uniswapPair), true);
        excludeFromMaxTransaction(msg.sender, true);
        excludeFromMaxTransaction(address(this), true);
        excludeFromMaxTransaction(BURN_ADDRESS, true);
        excludeFromMaxTransaction(address(0), true);

        // set amm pair
        _setAutomatedMarketMakerPair(address(_uniswapPair), true);
    }

    // receive
    receive() external payable {}

    // migrate
    function migrate(uint256 amount) external {
        if (!migrationEnabled) revert MigrationNotEnabled();

        uint256 _totalSupply = totalSupply();
        if (_totalSupply + amount > MAX_SUPPLY) revert SupplyExceeded();

        IERC20(AZKV1).transferFrom(msg.sender, DEV_WALLET, amount);

        _mint(msg.sender, amount);
    }

    // transfer
    function _transfer(address from, address to, uint256 amount) internal override {
        bool isBuying = automatedMarketMakerPairs[from] && !isExcludedMaxTransactionAmount[to];
        bool isSelling = automatedMarketMakerPairs[to] && !isExcludedMaxTransactionAmount[from];

        bool isOwner = from == owner() || to == owner();
        bool isBurning = to == BURN_ADDRESS;

        // check limits
        if (limitsEnabled && !isSwapping && !isOwner && !isBurning) {
            if (!tradingEnabled) {
                if (!isExcludedFromFees[from] && !isExcludedFromFees[to]) {
                    revert TradingNotActive();
                }
            }

            if (isBuying) {
                if (amount > maxTransactionAmount) {
                    revert BuyTransferExceedsMaxTransactionAmount();
                }
                if (amount + balanceOf(to) > maxWallet) {
                    revert BuyExceedsMaxWallet();
                }
            } else if (isSelling) {
                if (amount > maxTransactionAmount) {
                    revert SellTransferExceedsMaxTransactionAmount();
                }
            } else if (!isExcludedMaxTransactionAmount[to]) {
                if (amount + balanceOf(to) > maxWallet) {
                    revert MaxWallet();
                }
            }
        }

        // swap
        if (
            swapEnabled && balanceOf(address(this)) >= swapTokensAtAmount && !isSwapping
                && !automatedMarketMakerPairs[from] && !isExcludedFromFees[from] && !isExcludedFromFees[to]
        ) {
            isSwapping = true;
            _swap();
            isSwapping = false;
        }

        // fees
        uint256 fees = 0;
        if (!isSwapping && !isExcludedFromFees[from] && !isExcludedFromFees[to]) {
            // only take fees on buys/sells, never on wallet transfers
            uint256 sellTotalFees = sellLiquidityFee + sellDevFee;
            uint256 buyTotalFees = buyLiquidityFee + buyDevFee;

            // on sell
            if (automatedMarketMakerPairs[to] && sellTotalFees > 0) {
                fees = (amount * sellTotalFees) / 100;
                tokensForLiquidity += (fees * sellLiquidityFee) / sellTotalFees;
                tokensForDev += (fees * sellDevFee) / sellTotalFees;
                super._transfer(from, address(this), fees);
            }
            // on buy
            else if (automatedMarketMakerPairs[from] && buyTotalFees > 0) {
                fees = (amount * buyTotalFees) / 100;
                tokensForLiquidity += (fees * buyLiquidityFee) / buyTotalFees;
                tokensForDev += (fees * buyDevFee) / buyTotalFees;
                super._transfer(from, address(this), fees);
            }
        }

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

    // owners only
    function excludeFromMaxTransaction(address addr, bool excluded) public onlyOwner {
        isExcludedMaxTransactionAmount[addr] = excluded;
        emit ExcludeFromMaxTransaction(addr, excluded);
    }

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

    function enableTrading() external onlyOwner {
        tradingEnabled = true;
        swapEnabled = true;
    }

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

    function setFees(uint256 _buyLiquidityFee, uint256 _buyDevFee, uint256 _sellLiquidityFee, uint256 _sellDevFee)
        external
        onlyOwner
    {
        if (buyLiquidityFee + buyDevFee > MAX_TOTAL_FEE) {
            revert FeeTooHigh();
        }
        if (sellLiquidityFee + sellDevFee > MAX_TOTAL_FEE) {
            revert FeeTooHigh();
        }

        buyLiquidityFee = _buyLiquidityFee;
        buyDevFee = _buyDevFee;
        sellLiquidityFee = _sellLiquidityFee;
        sellDevFee = _sellDevFee;
    }

    function setSwapTokensAtAmount(uint256 newAmount) external onlyOwner {
        uint256 _totalSupply = totalSupply();
        if (newAmount < _totalSupply / 100000) {
            revert SwapAmountTooLow();
        }
        if (newAmount > (_totalSupply * 5) / 1000) {
            revert SwapAmountTooHigh();
        }
        swapTokensAtAmount = newAmount;
    }

    function setSwapEnabled(bool enabled) external onlyOwner {
        swapEnabled = enabled;
    }

    function setMaxTransactionAmount(uint256 max) external onlyOwner {
        maxTransactionAmount = max;
    }

    function setMaxWallet(uint256 max) external onlyOwner {
        maxWallet = max;
    }

    function clearStuckBalance() external onlyOwner {
        (bool success,) = payable(msg.sender).call{value: address(this).balance}("");
        require(success);
    }

    function clearStuckToken() external onlyOwner {
        _transfer(address(this), msg.sender, balanceOf(address(this)));
    }

    function setEnableMigration(bool e) external onlyOwner {
        migrationEnabled = e;
    }

    struct Airdrop {
        uint256 amount;
        address addr;
    }

    function airdrop(Airdrop[] calldata arr) external onlyOwner {
        uint256 _totalSupply = totalSupply();
        uint256 _amount = 0;
        for (uint256 i = 0; i < arr.length; i++) {
            _amount += arr[i].amount;
            if (_totalSupply + _amount > MAX_SUPPLY) revert SupplyExceeded();
            _mint(arr[i].addr, arr[i].amount);
        }
    }

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

    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] = UNISWAP_V2_ROUTER.WETH();

        _approve(address(this), address(UNISWAP_V2_ROUTER), tokenAmount);

        // make the swap
        UNISWAP_V2_ROUTER.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount, 0, path, address(this), block.timestamp
        );
    }

    function _addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
        // approve token transfer
        _approve(address(this), address(UNISWAP_V2_ROUTER), tokenAmount);

        // add liquidity
        UNISWAP_V2_ROUTER.addLiquidityETH{value: ethAmount}(
            address(this), tokenAmount, 0, 0, DEV_WALLET, block.timestamp
        );
    }

    function _swap() private {
        uint256 contractBalance = balanceOf(address(this));
        uint256 totalTokensToSwap = tokensForLiquidity + tokensForDev;

        // nothing to swap
        if (contractBalance == 0 || totalTokensToSwap == 0) {
            return;
        }

        // swap amount
        uint256 swapAmount = contractBalance;
        if (swapAmount > swapTokensAtAmount * 20) {
            swapAmount = swapTokensAtAmount * 20;
        }

        // split liquidity tokens - 0.5 keep as is, 0.5 swap to ETH
        uint256 totalLiquidityTokens = (swapAmount * tokensForLiquidity) / totalTokensToSwap;
        uint256 liquidityTokens = totalLiquidityTokens / 2;

        uint256 devTokens = swapAmount - totalLiquidityTokens;
        uint256 liquidityETHTokens = totalLiquidityTokens - liquidityTokens;

        uint256 initialETHBalance = address(this).balance;
        _swapTokensForEth(devTokens + liquidityETHTokens);
        uint256 gainedETH = address(this).balance - initialETHBalance;

        uint256 ethForLiquidity = (gainedETH * liquidityETHTokens) / (liquidityETHTokens + devTokens);

        // reset states
        tokensForLiquidity = 0;
        tokensForDev = 0;

        // add liquidity
        if (liquidityTokens > 0 && ethForLiquidity > 0) {
            _addLiquidity(liquidityTokens, ethForLiquidity);
            emit SwapAndLiquify(devTokens + liquidityETHTokens, gainedETH, liquidityTokens);
        }

        // dev transfer
        (bool success,) = payable(address(DEV_WALLET)).call{value: address(this).balance}("");
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

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

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * The default value of {decimals} is 18. To select a different value for
     * {decimals} you should overload it.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless this function is
     * overridden;
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        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);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like 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;
    }
}

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "openzeppelin/=lib/openzeppelin-contracts/contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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AnonZK.Airdrop[]","name":"arr","type":"tuple[]"}],"name":"airdrop","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"automatedMarketMakerPairs","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"buyDevFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"buyLiquidityFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"clearStuckBalance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"clearStuckToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"enableTrading","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"},{"internalType":"bool","name":"excluded","type":"bool"}],"name":"excludeFromFees","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"},{"internalType":"bool","name":"excluded","type":"bool"}],"name":"excludeFromMaxTransaction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"isExcludedFromFees","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"isExcludedMaxTransactionAmount","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"limitsEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxTransactionAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxWallet","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"migrate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"migrationEnabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"removeLimits","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sellDevFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sellLiquidityFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bool","name":"e","type":"bool"}],"name":"setEnableMigration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_buyLiquidityFee","type":"uint256"},{"internalType":"uint256","name":"_buyDevFee","type":"uint256"},{"internalType":"uin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