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// SPDX-License-Identifier: MIT

//
// Website: https://www.vanguard500.org/
// X: https://twitter.com/vanguardindex
// Telegram: https://t.me/vanguardindex

pragma solidity ^0.8.19;

import "./IUniswapV2Router02.sol";
import "./IUniswapV2Factory.sol";
import "./IUniswapV2Pair.sol";
import "./SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract Vanguard500 is IERC20, Ownable(msg.sender) {
    using SafeMath for uint256;

    /* -------------------------------------------------------------------------- */
    /*                                   events                                   */
    /* -------------------------------------------------------------------------- */
    event RequestRebase(bool increaseSupply, uint256 amount);
    event Rebase(uint256 indexed time, uint256 totalSupply);
    event RemovedLimits();
    event Log(string message, uint256 value);
    event ErrorCaught(string reason);

    /* -------------------------------------------------------------------------- */
    /*                                  constants                                 */
    /* -------------------------------------------------------------------------- */
    address constant DEAD = 0x000000000000000000000000000000000000dEaD;
    address constant ZERO = 0x0000000000000000000000000000000000000000;
    uint256 constant NOMINAL_TAX = 3;
    uint256 constant MINIMAL_TAX = 1;

    uint256 private constant MAX_SUPPLY = ~uint128(0);
    uint256 private constant MIN_SUPPLY = 1 ether;
    uint256 public constant INITIAL_BREADS_SUPPLY = 100_000 ether;
    uint256 public DELTA_SUPPLY = INITIAL_BREADS_SUPPLY;

    // TOTAL_CRUMBS is a multiple of INITIAL_BREADS_SUPPLY so that _crumbsPerBread is an integer.
    // Use the highest value that fits in a uint256 for max granularity.
    uint256 public constant TOTAL_CRUMBS =
        type(uint256).max - (type(uint256).max % INITIAL_BREADS_SUPPLY);
    uint256 public constant zero = uint256(0);

    /* -------------------------------------------------------------------------- */
    /*                                   states                                   */
    /* -------------------------------------------------------------------------- */

    address public SWAP_ROUTER_ADR = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    IUniswapV2Router02 public SWAP_ROUTER;
    address public immutable SWAP_PAIR;

    uint256 public _totalSupply;
    uint256 public _crumbsPerBread;
    uint256 private crumbsSwapThreshold = ((TOTAL_CRUMBS / 100000) * 25);

    address private oracleWallet;
    uint256 public vatBuy;
    uint256 public vatSell;

    bool public limitRebase = true;
    bool public limitRebasePct = true;
    bool public giveBread = true;
    bool public swapEnabled = true;
    bool public enableUpdateTax = true;
    bool public syncLP = true;
    bool inSwap;
    uint256 private lastRebaseTime = 0;
    uint256 private limitRebaseRate = 10;
    uint256 private limitDebaseRate = 5;
    uint256 private limitDayRebase = 100;
    uint256 private limitDayDebase = 65;
    uint256 private limitNightRebase = 60;
    uint256 private limitNightDebase = 65;
    uint256 private transactionCount = 0;
    uint256 public txToSwitchTax;

    uint256 public buyToRebase = 0;
    uint256 public sellToRebase = 0;

    string _name = "Vanguard 500 Index Fund";
    string _symbol = "VFIAX";

    bool public dayMode = true;

    mapping(address => uint256) public _crumbBalances;
    mapping(address => mapping(address => uint256)) public _allowedBreads;
    mapping(address => bool) public isWhitelisted;

    /* -------------------------------------------------------------------------- */
    /*                                  modifiers                                 */
    /* -------------------------------------------------------------------------- */
    modifier swapping() {
        inSwap = true;
        _;
        inSwap = false;
    }

    modifier onlyOracle() {
        require(msg.sender == oracleWallet, "Not oracle");
        _;
    }

    constructor(address _oracle) {
        // create uniswap pair
        SWAP_ROUTER = IUniswapV2Router02(SWAP_ROUTER_ADR);
        address _uniswapPair = IUniswapV2Factory(SWAP_ROUTER.factory())
            .createPair(address(this), SWAP_ROUTER.WETH());
        SWAP_PAIR = _uniswapPair;

        _allowedBreads[address(this)][address(SWAP_ROUTER)] = type(uint256).max;
        _allowedBreads[address(this)][msg.sender] = type(uint256).max;
        _allowedBreads[address(msg.sender)][address(SWAP_ROUTER)] = type(
            uint256
        ).max;

        oracleWallet = _oracle;
        vatBuy = 20;
        vatSell = 20;
        txToSwitchTax = 15;

        isWhitelisted[msg.sender] = true;
        isWhitelisted[address(this)] = true;
        isWhitelisted[SWAP_ROUTER_ADR] = true;
        isWhitelisted[oracleWallet] = true;
        isWhitelisted[ZERO] = true;
        isWhitelisted[DEAD] = true;

        _totalSupply = INITIAL_BREADS_SUPPLY;
        _crumbsPerBread = TOTAL_CRUMBS.div(_totalSupply);

        _crumbBalances[msg.sender] = TOTAL_CRUMBS;

        // emit Transfer(address(0), _bw, balanceOf(_bw));
        emit Transfer(address(0), msg.sender, balanceOf(msg.sender));
    }

    /* -------------------------------------------------------------------------- */
    /*                                    views                                   */
    /* -------------------------------------------------------------------------- */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    function decimals() external pure returns (uint8) {
        return 18;
    }

    function name() external view returns (string memory) {
        return _name;
    }

    function symbol() external view returns (string memory) {
        return _symbol;
    }

    function balanceOf(address holder) public view returns (uint256) {
        return _crumbBalances[holder].div(_crumbsPerBread);
    }

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

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

    function setSwapBackSettings(
        bool _enabled,
        uint256 _pt
    ) external onlyOwner {
        swapEnabled = _enabled;
        crumbsSwapThreshold = (TOTAL_CRUMBS * _pt) / 100000;
    }

    function enableBreadExchange() external onlyOwner {
        require(!giveBread, "Token launched");
        giveBread = true;
        swapEnabled = true;
    }

    function whitelistWallet(
        address _address,
        bool _isWhitelisted
    ) external onlyOwner {
        isWhitelisted[_address] = _isWhitelisted;
    }

    function setTxToSwitchTax(uint256 _c) external onlyOwner {
        txToSwitchTax = _c;
    }

    function setToFinalTax() external onlyOwner {
        enableUpdateTax = false;
        vatBuy = NOMINAL_TAX;
        vatSell = NOMINAL_TAX;
    }

    /* -------------------------------------------------------------------------- */
    /*                                   oracle                                   */
    /* -------------------------------------------------------------------------- */
    function switchMode() external onlyOracle {
        dayMode = !dayMode;
    }

    function setRebaseLimit(bool _l) external onlyOracle {
        limitRebase = _l;
    }

    function setRebaseLimit(bool _l, bool _p) external onlyOracle {
        limitRebase = _l;
        limitRebasePct = _p;
    }

    function setSyncLP(bool _s) external onlyOracle {
        syncLP = _s;
    }

    function setRebaseLimitRate(
        uint256 _r,
        uint256 _dr,
        uint256 _nr
    ) external onlyOracle {
        limitRebaseRate = _r;
        limitDayRebase = _dr;
        limitNightRebase = _nr;
    }

    function setDebaseLimitRate(
        uint256 _r,
        uint256 _dd,
        uint256 _nd
    ) external onlyOracle {
        limitDebaseRate = _r;
        limitDayDebase = _dd;
        limitNightDebase = _nd;
    }

    function setToMinimalTax() external onlyOracle {
        enableUpdateTax = false;
        vatBuy = MINIMAL_TAX;
        vatSell = MINIMAL_TAX;
    }

    function canRebase() public view returns (bool) {
        return sellToRebase != buyToRebase;
    }

    function rebase() external onlyOracle {
        uint256 currentTime = block.timestamp;
        uint256 newSupply = _totalSupply;
        uint256 rebaseDelta = 0;
        bool increaseSupply = false;
        if (sellToRebase > buyToRebase) {
            rebaseDelta = sellToRebase - buyToRebase;
        } else if (buyToRebase > sellToRebase) {
            rebaseDelta = buyToRebase - sellToRebase;
            increaseSupply = true;
        } else {
            emit Log("same amount, no need to rebase", 0);
            return;
        }
        if (!dayMode) {
            increaseSupply = !increaseSupply;
        }

        if (currentTime >= lastRebaseTime + 1 days) {
            lastRebaseTime = currentTime;
            DELTA_SUPPLY = newSupply;
        }

        if (increaseSupply) {
            if (limitRebasePct) {
                if (dayMode) {
                    if (
                        rebaseDelta > DELTA_SUPPLY.mul(limitDayRebase).div(1000)
                    ) {
                        rebaseDelta = DELTA_SUPPLY.mul(limitDayRebase).div(
                            1000
                        );
                    }
                } else {
                    if (
                        rebaseDelta >
                        DELTA_SUPPLY.mul(limitNightRebase).div(1000)
                    ) {
                        rebaseDelta = DELTA_SUPPLY.mul(limitNightRebase).div(
                            1000
                        );
                    }
                }
            }
            if (
                limitRebase &&
                _totalSupply.add(rebaseDelta) >
                DELTA_SUPPLY.mul(limitRebaseRate)
            ) {
                newSupply = DELTA_SUPPLY.mul(limitRebaseRate);
            } else {
                newSupply = _totalSupply.add(rebaseDelta);
            }
        } else {
            if (limitRebasePct) {
                if (dayMode) {
                    if (
                        rebaseDelta > DELTA_SUPPLY.mul(limitDayDebase).div(1000)
                    ) {
                        rebaseDelta = DELTA_SUPPLY.mul(limitDayDebase).div(
                            1000
                        );
                    }
                } else {
                    if (
                        rebaseDelta >
                        DELTA_SUPPLY.mul(limitNightDebase).div(1000)
                    ) {
                        rebaseDelta = DELTA_SUPPLY.mul(limitNightDebase).div(
                            1000
                        );
                    }
                }
            }
            if (
                limitRebase &&
                _totalSupply.sub(rebaseDelta) <
                DELTA_SUPPLY.div(limitDebaseRate)
            ) {
                newSupply = DELTA_SUPPLY.div(limitDebaseRate);
            } else {
                newSupply = _totalSupply.sub(rebaseDelta);
            }
        }

        if (newSupply > MAX_SUPPLY) {
            newSupply = MAX_SUPPLY;
        }

        if (newSupply < MIN_SUPPLY) {
            newSupply = MIN_SUPPLY;
        }

        _totalSupply = newSupply;
        _crumbsPerBread = TOTAL_CRUMBS.div(_totalSupply);
        sellToRebase = 0;
        buyToRebase = 0;

        if (syncLP) {
            lpSync();
        }

        emit Rebase(currentTime, _totalSupply);
    }

    /* -------------------------------------------------------------------------- */
    /*                                   private                                  */
    /* -------------------------------------------------------------------------- */
    function updateTaxes() internal {
        if (vatSell > NOMINAL_TAX) {
            transactionCount += 1;
        }
        if (transactionCount == txToSwitchTax) {
            vatBuy = 10;
            vatSell = 10;
        } else if (transactionCount == txToSwitchTax.mul(2)) {
            vatBuy = 5;
            vatSell = 5;
        } else if (
            transactionCount >= txToSwitchTax.mul(3) && vatSell > NOMINAL_TAX
        ) {
            vatBuy = NOMINAL_TAX;
            vatSell = NOMINAL_TAX;
            enableUpdateTax = false;
            emit RemovedLimits();
        }
    }

    function lpSync() internal {
        IUniswapV2Pair _pair = IUniswapV2Pair(SWAP_PAIR);
        try _pair.sync() {} catch {}
    }

    /* -------------------------------------------------------------------------- */
    /*                                    ERC20                                   */
    /* -------------------------------------------------------------------------- */
    function approveMax(address spender) external returns (bool) {
        return approve(spender, type(uint256).max);
    }

    function allowance(
        address owner_,
        address spender
    ) public view returns (uint256) {
        return _allowedBreads[owner_][spender];
    }

    function approve(address spender, uint256 value) public returns (bool) {
        _allowedBreads[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    function increaseAllowance(
        address spender,
        uint256 addedValue
    ) public returns (bool) {
        _allowedBreads[msg.sender][spender] = _allowedBreads[msg.sender][
            spender
        ].add(addedValue);
        emit Approval(msg.sender, spender, _allowedBreads[msg.sender][spender]);
        return true;
    }

    function decreaseAllowance(
        address spender,
        uint256 subtractedValue
    ) public returns (bool) {
        uint256 oldValue = _allowedBreads[msg.sender][spender];
        if (subtractedValue >= oldValue) {
            _allowedBreads[msg.sender][spender] = 0;
        } else {
            _allowedBreads[msg.sender][spender] = oldValue.sub(subtractedValue);
        }
        emit Approval(msg.sender, spender, _allowedBreads[msg.sender][spender]);
        return true;
    }

    function transfer(
        address recipient,
        uint256 amount
    ) external override returns (bool) {
        return _transferFrom(msg.sender, recipient, amount);
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external override returns (bool) {
        if (_allowedBreads[sender][msg.sender] != type(uint256).max) {
            require(
                _allowedBreads[sender][msg.sender] >= amount,
                "ERC20: insufficient allowance"
            );
            _allowedBreads[sender][msg.sender] =
                _allowedBreads[sender][msg.sender] -
                amount;
        }

        return _transferFrom(sender, recipient, amount);
    }

    function _transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) internal returns (bool) {
        require(amount > 0, "Transfer amount must be greater than zero");
        require(sender != DEAD, "Please use a good address");
        require(sender != ZERO, "Please use a good address");

        uint256 crumbAmount = amount.mul(_crumbsPerBread);
        require(_crumbBalances[sender] >= crumbAmount, "Insufficient Balance");
        if (!inSwap && !isWhitelisted[sender] && !isWhitelisted[recipient]) {
            require(giveBread, "Trading not live");
            if (_shouldSwapBack(recipient)) {
                try this.swapBack() {} catch {}
            }

            uint256 vatAmount = 0;
            if (sender == SWAP_PAIR) {
                emit RequestRebase(true, amount);
                buyToRebase += amount;
                vatAmount = crumbAmount.mul(vatBuy).div(100);
            } else if (recipient == SWAP_PAIR) {
                emit RequestRebase(false, amount);
                sellToRebase += amount;
                vatAmount = crumbAmount.mul(vatSell).div(100);
            }

            if (vatAmount > 0) {
                _crumbBalances[sender] -= vatAmount;
                _crumbBalances[address(this)] += vatAmount;
                emit Transfer(
                    sender,
                    address(this),
                    vatAmount.div(_crumbsPerBread)
                );
                crumbAmount -= vatAmount;

                if (enableUpdateTax) {
                    updateTaxes();
                }
            }
        }

        _crumbBalances[sender] = _crumbBalances[sender].sub(crumbAmount);
        _crumbBalances[recipient] = _crumbBalances[recipient].add(crumbAmount);

        if (
            sender != owner() &&
            sender != oracleWallet &&
            sender != address(this) &&
            recipient != owner() &&
            recipient != oracleWallet &&
            recipient != address(this)
        ) {
            require(amount <= ((_totalSupply * 25) / 1000));
        }

        emit Log("Amount transfered", crumbAmount.div(_crumbsPerBread));
        emit Transfer(sender, recipient, crumbAmount.div(_crumbsPerBread));

        return true;
    }

    function _shouldSwapBack(address recipient) internal view returns (bool) {
        return
            recipient == SWAP_PAIR &&
            !inSwap &&
            swapEnabled &&
            balanceOf(address(this)) >=
            crumbsSwapThreshold.div(_crumbsPerBread);
    }

    function swapBack() public swapping {
        uint256 contractBalance = balanceOf(address(this));
        if (contractBalance == 0) {
            return;
        }

        if (
            contractBalance > crumbsSwapThreshold.div(_crumbsPerBread).mul(20)
        ) {
            contractBalance = crumbsSwapThreshold.div(_crumbsPerBread).mul(20);
        }

        swapTokensForETH(contractBalance);
    }

    function swapTokensForETH(uint256 tokenAmount) internal {
        address[] memory path = new address[](2);
        path[0] = address(this);
        path[1] = address(SWAP_ROUTER.WETH());

        SWAP_ROUTER.swapExactTokensForETHSupportingFeeOnTransferTokens(
            tokenAmount,
            0,
            path,
            address(oracleWallet),
            block.timestamp
        );
    }

    receive() external payable {}
}

pragma solidity >=0.6.2;

import "./IUniswapV2Router01.sol";

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;
}

pragma solidity >=0.5.0;

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;
}

pragma solidity >=0.5.0;

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;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(
        uint256 a,
        uint256 b
    ) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @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 value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` 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 value) external returns (bool);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @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 {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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);
    }
}

pragma solidity >=0.6.2;

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 removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint amountA, uint amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) 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);
}

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

pragma solidity ^0.8.20;

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

• No Contract Security Audit Submitted- Submit Audit Here

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000000000000000000000000c1de6834d43445ffe8ff3a8ef18856b306af82e4

-----Decoded View---------------
Arg [0] : _oracle (address): 0xc1DE6834d43445Ffe8Ff3A8eF18856B306af82E4

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000c1de6834d43445ffe8ff3a8ef18856b306af82e4