Doge404

{{
  "language": "Solidity",
  "sources": {
    "contracts/access/Ownable.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "../libraries/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.
 */
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.
     */
    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);
    }
}"
    },
    "contracts/Doge404.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "./token/ERC20.sol";
import "./access/Ownable.sol";
import "./security/ReentrancyGuard.sol";
import "./interfaces/IUniswap.sol";

/**
 * https://blog.ethereum.org/404doge
 * https://x.com/404doge
 */
contract Doge404 is ERC20, Ownable, ReentrancyGuard {
    
    // ============ IMMUTABLE VARIABLES ============
    
    IUniswapV2Router02 public immutable woofRouter;
    address public immutable dogePair;
    
    // ============ STATE VARIABLES ============
    
    mapping(address => bool) private _isExcludedFromFees;
    mapping(address => bool) public automatedMarketMakerPairs;
    
    uint256 public buyWoofTax = 1400; // 14% (in basis points)
    uint256 public sellWoofTax = 2400; // 24% (in basis points)
    uint256 public maxWoofWallet; // Maximum tokens per wallet
    uint256 public maxWoofTx; // Maximum tokens per transaction
    
    address public treasuryWallet; // Wallet that receives tax revenue
    
    bool public tradingEnabled = false; // Trading must be manually enabled
    bool public limitsInEffect = true; // Anti-whale limits active
    bool private swapping; // Flag to prevent recursive swaps
    
    uint256 public swapTokensAtAmount; // Threshold for automatic tax swaps
    
    // ============ CONSTANTS ============
    
    uint256 private constant MAX_TAX_RATE = 2500; // 25% maximum tax
    uint256 private constant TAX_DENOMINATOR = 10000; // For basis point calculations
    
    // ============ EVENTS ============
    
    event WoofTradeEnabled();
    event WoofLimitsRemoved();
    event WoofTaxUpdated(uint256 buyTax, uint256 sellTax);
    event WoofWalletUpdated(address indexed newWallet);
    event WoofSwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived);
    event WoofExclusionUpdated(address indexed account, bool excluded);
    event WoofPairUpdated(address indexed pair, bool indexed value);
    
    // ============ CONSTRUCTOR ============
    
    constructor() ERC20("Doge404", "DOGE404") {
        // Initialize Uniswap V2 Router (mainnet/testnet address)
        IUniswapV2Router02 _woofRouter = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        
        woofRouter = _woofRouter;
        
        // Create Uniswap pair for this token
        dogePair = IUniswapV2Factory(_woofRouter.factory()).createPair(
            address(this), 
            _woofRouter.WETH()
        );
        
        _setAutomatedMarketMakerPair(address(dogePair), true);
        
        uint256 totalSupply = 1_000_000_000 * 1e18; // 1 billion tokens
        
        // Set initial limits
        maxWoofWallet = totalSupply * 404 / 10000; // 4.04% of total supply
        maxWoofTx = totalSupply * 404 / 100000; // 0.404% of total supply
        swapTokensAtAmount = totalSupply * 5 / 10000; // 0.05% swap threshold
        
        treasuryWallet = owner();
        
        // Exclude important addresses from fees and limits
        excludeFromFees(owner(), true);
        excludeFromFees(address(this), true);
        excludeFromFees(address(0xdead), true);
        excludeFromFees(treasuryWallet, true);
        
        // Mint entire supply to owner
        _mint(owner(), totalSupply);
    }
    
    // ============ RECEIVE FUNCTION ============
    
    receive() external payable {}
    
    // ============ OWNER FUNCTIONS ============
    
    /**
     * @dev Enable trading - can only be called once by owner
     */
    function enableWoofTrading() external onlyOwner {
        require(!tradingEnabled, "Trading already enabled");
        tradingEnabled = true;
        emit WoofTradeEnabled();
    }
    
    /**
     * @dev Remove anti-whale limits - irreversible
     */
    function removeWoofLimits() external onlyOwner returns (bool) {
        limitsInEffect = false;
        emit WoofLimitsRemoved();
        return true;
    }
    
    /**
     * @dev Update buy and sell tax rates
     * @param _buyTax New buy tax rate (in basis points, max 2500 = 25%)
     * @param _sellTax New sell tax rate (in basis points, max 2500 = 25%)
     */
    function updateWoofTaxes(uint256 _buyTax, uint256 _sellTax) external onlyOwner {
        require(_buyTax <= MAX_TAX_RATE, "Buy tax too high");
        require(_sellTax <= MAX_TAX_RATE, "Sell tax too high");
        buyWoofTax = _buyTax;
        sellWoofTax = _sellTax;
        emit WoofTaxUpdated(_buyTax, _sellTax);
    }
    
    /**
     * @dev Update wallet and transaction limits
     * @param _maxWallet New maximum wallet size (minimum 0.5% of supply)
     * @param _maxTx New maximum transaction size (minimum 0.1% of supply)
     */
    function updateWoofLimits(uint256 _maxWallet, uint256 _maxTx) external onlyOwner {
        require(_maxWallet >= totalSupply() * 5 / 1000, "Max wallet too low");
        require(_maxTx >= totalSupply() * 1 / 1000, "Max tx too low");
        maxWoofWallet = _maxWallet;
        maxWoofTx = _maxTx;
    }
    
    /**
     * @dev Update the treasury wallet address
     * @param _treasuryWallet New treasury wallet address
     */
    function updateWoofWallet(address _treasuryWallet) external onlyOwner {
        require(_treasuryWallet != address(0), "Treasury cannot be zero address");
        treasuryWallet = _treasuryWallet;
        emit WoofWalletUpdated(_treasuryWallet);
    }
    
    /**
     * @dev Exclude or include an address from fees
     * @param account Address to update
     * @param excluded True to exclude from fees, false to include
     */
    function excludeFromFees(address account, bool excluded) public onlyOwner {
        _isExcludedFromFees[account] = excluded;
        emit WoofExclusionUpdated(account, excluded);
    }
    
    /**
     * @dev Set an address as an automated market maker pair
     * @param pair Address of the pair
     * @param value True to set as AMM pair, false to remove
     */
    function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
        require(pair != dogePair, "Cannot remove main pair");
        _setAutomatedMarketMakerPair(pair, value);
    }
    
    /**
     * @dev Manual swap of contract tokens for ETH
     */
    function manualWoofSwap() external onlyOwner {
        uint256 contractBalance = balanceOf(address(this));
        require(contractBalance > 0, "No tokens to swap");
        swapTokensForEth(contractBalance);
    }
    
    /**
     * @dev Emergency function to rescue ETH from contract
     */
    function rescueWoofETH() external onlyOwner {
        uint256 ethBalance = address(this).balance;
        require(ethBalance > 0, "No ETH to rescue");
        
        (bool success, ) = payable(owner()).call{value: ethBalance}("");
        require(success, "ETH rescue failed");
    }
    
    /**
     * @dev Emergency function to rescue ERC20 tokens from contract
     * @param tokenAddress Address of the token to rescue
     */
    function rescueWoofTokens(address tokenAddress) external onlyOwner {
        require(tokenAddress != address(this), "Cannot rescue own tokens");
        IERC20 token = IERC20(tokenAddress);
        uint256 balance = token.balanceOf(address(this));
        require(balance > 0, "No tokens to rescue");
        require(token.transfer(owner(), balance), "Token rescue failed");
    }
    
    // ============ PUBLIC VIEW FUNCTIONS ============
    
    /**
     * @dev Check if an address is excluded from fees
     * @param account Address to check
     * @return bool True if excluded from fees
     */
    function isExcludedFromFees(address account) public view returns (bool) {
        return _isExcludedFromFees[account];
    }
    
    /**
     * @dev Get current tax rates
     * @return buyTax Current buy tax rate in basis points
     * @return sellTax Current sell tax rate in basis points
     */
    function getWoofTaxRates() external view returns (uint256 buyTax, uint256 sellTax) {
        return (buyWoofTax, sellWoofTax);
    }
    
    /**
     * @dev Get current limits
     * @return maxWallet Current maximum wallet size
     * @return maxTx Current maximum transaction size
     * @return swapThreshold Current swap threshold
     */
    function getWoofLimits() external view returns (uint256 maxWallet, uint256 maxTx, uint256 swapThreshold) {
        return (maxWoofWallet, maxWoofTx, swapTokensAtAmount);
    }
    
    // ============ INTERNAL FUNCTIONS ============
    
    /**
     * @dev Internal function to set automated market maker pair
     */
    function _setAutomatedMarketMakerPair(address pair, bool value) private {
        automatedMarketMakerPairs[pair] = value;
        emit WoofPairUpdated(pair, value);
    }
    
    /**
     * @dev Override transfer function to implement taxes and limits
     */
    function _transfer(address from, address to, uint256 amount) internal override {
        require(from != address(0), "ERC20: transfer from zero address");
        require(to != address(0), "ERC20: transfer to zero address");
        
        if (amount == 0) {
            super._transfer(from, to, 0);
            return;
        }
        
        // Apply limits if they're in effect
        if (limitsInEffect) {
            if (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && !swapping) {
                if (!tradingEnabled) {
                    require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "Trading not active");
                }
                
                // On buy
                if (automatedMarketMakerPairs[from] && !_isExcludedFromFees[to]) {
                    require(amount <= maxWoofTx, "Buy transfer amount exceeds the maxWoofTx");
                    require(amount + balanceOf(to) <= maxWoofWallet, "Max wallet exceeded");
                }
                // On sell
                else if (automatedMarketMakerPairs[to] && !_isExcludedFromFees[from]) {
                    require(amount <= maxWoofTx, "Sell transfer amount exceeds the maxWoofTx");
                }
                // On normal transfer
                else if (!_isExcludedFromFees[to]) {
                    require(amount + balanceOf(to) <= maxWoofWallet, "Max wallet exceeded");
                }
            }
        }
        
        // Check if we should swap accumulated taxes
        uint256 contractTokenBalance = balanceOf(address(this));
        bool canSwap = contractTokenBalance >= swapTokensAtAmount;
        
        if (canSwap && !swapping && !automatedMarketMakerPairs[from] && 
            !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
            swapping = true;
            swapBack();
            swapping = false;
        }
        
        bool takeFee = !swapping;
        
        // If any account belongs to _isExcludedFromFees then remove the fee
        if (_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
            takeFee = false;
        }
        
        uint256 fees = 0;
        // Only take fees on buys/sells, do not take on wallet transfers
        if (takeFee) {
            // On sell
            if (automatedMarketMakerPairs[to] && sellWoofTax > 0) {
                fees = amount * sellWoofTax / TAX_DENOMINATOR;
            }
            // On buy
            else if (automatedMarketMakerPairs[from] && buyWoofTax > 0) {
                fees = amount * buyWoofTax / TAX_DENOMINATOR;
            }
            
            if (fees > 0) {
                super._transfer(from, address(this), fees);
            }
            
            amount -= fees;
        }
        
        super._transfer(from, to, amount);
    }
    
    /**
     * @dev Swap accumulated tax tokens for ETH
     */
    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] = woofRouter.WETH();
        
        _approve(address(this), address(woofRouter), tokenAmount);
        
        // Make the swap
        woofRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0, // Accept any amount of ETH
            path,
            treasuryWallet,
            block.timestamp
        );
        
        emit WoofSwapAndLiquify(tokenAmount, address(this).balance);
    }
    
    /**
     * @dev Swap back function called during transfers
     */
    function swapBack() private {
        uint256 contractBalance = balanceOf(address(this));
        if (contractBalance == 0) return;
        
        // Cap the swap to prevent huge price impact
        if (contractBalance > swapTokensAtAmount * 20) {
            contractBalance = swapTokensAtAmount * 20;
        }
        
        swapTokensForEth(contractBalance);
    }
}"
    },
    "contracts/interfaces/IERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/**
 * @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`).
     */
    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`.
     */
    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}.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     */
    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.
     */
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}"
    },
    "contracts/interfaces/IUniswap.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

interface IUniswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

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

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

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

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

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

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

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

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

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);

    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);

    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);

    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);

    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);

    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);

    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

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

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

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}"
    },
    "contracts/libraries/Context.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

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

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}"
    },
    "contracts/security/ReentrancyGuard.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
     * `nonReentrant` function in the call stack.
     */
    function _reentrancyGuardEntered() internal view returns (bool) {
        return _status == _ENTERED;
    }
}"
    },
    "contracts/token/ERC20.sol": {
      "content": "// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

import "../interfaces/IERC20.sol";
import "../libraries/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 */
contract ERC20 is Context, IERC20 {
    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}.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

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

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

    /**
     * @dev Returns the number of decimals used to get its user representation.
     */
    function decimals() public view virtual 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}.
     */
    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}.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     */
    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.
     */
    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.
     */
    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`.
     */
    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;
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /**
     * @dev Creates `amount` tokens and assigns them to `account`.
     */
    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 {
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

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

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the total supply.
     */
    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;
            _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.
     */
    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`.
     */
    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.
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens.
     */
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}"
    }
  },
  "settings": {
    "optimizer": {
      "enabled": true,
      "runs": 200
    },
    "evmVersion": "paris",
    "outputSelection": {
      "*": {
        "*": [
          "evm.bytecode",
          "evm.deployedBytecode",
          "devdoc",
          "userdoc",
          "metadata",
          "abi"
        ]
      }
    }
  }
}}