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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Pausable} from "@openzeppelin/contracts/security/Pausable.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {IERC20, SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import {IUniswapV2Router02} from "./interfaces/IUniswapV2Router02.sol";
import {IRewardsDistribution} from "./interfaces/IRewardsDistribution.sol";

/**
 * @title MeowlFeeSharingWithCompounding
 * @notice It sells WETH to MEOWL using Uniswap V2.
 * @dev Prime shares represent the number of shares in the FeeSharingSystem. When not specified, shares represent secondary shares in this contract.
 */
contract MeowlFeeSharingWithCompounding is Ownable, Pausable, ReentrancyGuard {
    using SafeERC20 for IERC20;

    // Maximum buffer between 2 harvests (in blocks)
    uint256 public constant MAXIMUM_HARVEST_BUFFER_BLOCKS = 6500;

    // FeeSharingSystem (handles the distribution of WETH for MEOWL stakers)
    IRewardsDistribution public immutable feeSharingSystem;

    // Router of Uniswap v2
    IUniswapV2Router02 public immutable uniswapRouter;

    // Minimum deposit in MEOWL (it is derived from the FeeSharingSystem)
    uint256 public immutable MINIMUM_DEPOSIT_MEOWL;

    // Meowl Token (MEOWL)
    IERC20 public immutable meowl;

    // Reward token (WETH)
    IERC20 public immutable rewardToken;

    // Whether harvest and WETH selling is triggered automatically at user action
    bool public canHarvest;

    // Buffer between two harvests (in blocks)
    uint256 public harvestBufferBlocks;

    // Last user action block
    uint256 public lastHarvestBlock;

    // Maximum price of MEOWL (in WETH) multiplied 1e18 (e.g., 0.0004 ETH --> 4e14)
    uint256 public maxPriceMEOWLInWETH;

    // Threshold amount (in rewardToken)
    uint256 public thresholdAmount;

    // Total number of shares outstanding
    uint256 public totalShares;

    // Keeps track of number of user shares
    mapping(address => uint256) public userInfo;

    event ConversionToMEOWL(uint256 amountSold, uint256 amountReceived);
    event Deposit(address indexed user, uint256 amount);
    event FailedConversion();
    event HarvestStart();
    event HarvestStop();
    event NewHarvestBufferBlocks(uint256 harvestBufferBlocks);
    event NewMaximumPriceMEOWLInWETH(uint256 maxPriceMEOWLInWETH);
    event NewThresholdAmount(uint256 thresholdAmount);
    event Withdraw(address indexed user, uint256 amount);

    /**
     * @notice Constructor
     * @param _feeSharingSystem address of the fee sharing system contract
     * @param _uniswapRouter address of the Uniswap v2 router
     */
    constructor(address _feeSharingSystem, address _uniswapRouter) {
        address meowlTokenAddress = address(
            IRewardsDistribution(_feeSharingSystem).stakingToken()
        );
        address rewardTokenAddress = address(
            IRewardsDistribution(_feeSharingSystem).rewardsToken()
        );

        meowl = IERC20(meowlTokenAddress);
        rewardToken = IERC20(rewardTokenAddress);

        feeSharingSystem = IRewardsDistribution(_feeSharingSystem);
        uniswapRouter = IUniswapV2Router02(_uniswapRouter);

        IERC20(meowlTokenAddress).approve(_feeSharingSystem, type(uint256).max);
        IERC20(rewardTokenAddress).approve(_uniswapRouter, type(uint256).max);

        MINIMUM_DEPOSIT_MEOWL = 10 ** 18;
    }

    /**
     * @notice Deposit MEOWL tokens
     * @param amount amount to deposit (in MEOWL)
     * @dev There is a limit of 1 MEOWL per deposit to prevent potential manipulation of the shares
     */
    function deposit(uint256 amount) external nonReentrant whenNotPaused {
        require(
            amount >= MINIMUM_DEPOSIT_MEOWL,
            "Deposit: Amount must be >= 1 MEOWL"
        );

        if (
            block.number > (lastHarvestBlock + harvestBufferBlocks) &&
            canHarvest &&
            totalShares != 0
        ) {
            _harvestAndSellAndCompound();
        }

        // Transfer MEOWL tokens to this address
        meowl.safeTransferFrom(msg.sender, address(this), amount);

        // Fetch the total number of MEOWL staked by this contract
        uint256 totalAmountStaked = feeSharingSystem.balanceOf(address(this));

        uint256 currentShares = totalShares == 0
            ? amount
            : (amount * totalShares) / totalAmountStaked;
        require(currentShares != 0, "Deposit: Fail");

        // Adjust number of shares for user/total
        userInfo[msg.sender] += currentShares;
        totalShares += currentShares;

        // Deposit to FeeSharingSystem contract
        feeSharingSystem.stake(amount);

        emit Deposit(msg.sender, amount);
    }

    /**
     * @notice Redeem shares for MEOWL tokens
     * @param shares number of shares to redeem
     */
    function withdraw(uint256 shares) external nonReentrant {
        require(
            (shares > 0) && (shares <= userInfo[msg.sender]),
            "Withdraw: Shares equal to 0 or larger than user shares"
        );

        _withdraw(shares);
    }

    /**
     * @notice Withdraw all shares of sender
     */
    function withdrawAll() external nonReentrant {
        require(userInfo[msg.sender] > 0, "Withdraw: Shares equal to 0");

        _withdraw(userInfo[msg.sender]);
    }

    /**
     * @notice Harvest pending WETH, sell them to MEOWL, and deposit MEOWL (if possible)
     * @dev Only callable by owner.
     */
    function harvestAndSellAndCompound() external nonReentrant onlyOwner {
        require(totalShares != 0, "Harvest: No share");
        require(block.number != lastHarvestBlock, "Harvest: Already done");

        _harvestAndSellAndCompound();
    }

    /**
     * @notice Adjust allowance if necessary
     * @dev Only callable by owner.
     */
    function checkAndAdjustMEOWLTokenAllowanceIfRequired() external onlyOwner {
        meowl.approve(address(feeSharingSystem), type(uint256).max);
    }

    /**
     * @notice Adjust allowance if necessary
     * @dev Only callable by owner.
     */
    function checkAndAdjustRewardTokenAllowanceIfRequired() external onlyOwner {
        rewardToken.approve(address(uniswapRouter), type(uint256).max);
    }

    /**
     * @notice Update harvest buffer block
     * @param _newHarvestBufferBlocks buffer in blocks between two harvest operations
     * @dev Only callable by owner.
     */
    function updateHarvestBufferBlocks(
        uint256 _newHarvestBufferBlocks
    ) external onlyOwner {
        require(
            _newHarvestBufferBlocks <= MAXIMUM_HARVEST_BUFFER_BLOCKS,
            "Owner: Must be below MAXIMUM_HARVEST_BUFFER_BLOCKS"
        );
        harvestBufferBlocks = _newHarvestBufferBlocks;

        emit NewHarvestBufferBlocks(_newHarvestBufferBlocks);
    }

    /**
     * @notice Start automatic harvest/selling transactions
     * @dev Only callable by owner
     */
    function startHarvest() external onlyOwner {
        canHarvest = true;

        emit HarvestStart();
    }

    /**
     * @notice Stop automatic harvest transactions
     * @dev Only callable by owner
     */
    function stopHarvest() external onlyOwner {
        canHarvest = false;

        emit HarvestStop();
    }

    /**
     * @notice Update maximum price of MEOWL in WETH
     * @param _newMaxPriceMEOWLInWETH new maximum price of MEOWL in WETH times 1e18
     * @dev Only callable by owner
     */
    function updateMaxPriceOfMEOWInWETH(
        uint256 _newMaxPriceMEOWLInWETH
    ) external onlyOwner {
        maxPriceMEOWLInWETH = _newMaxPriceMEOWLInWETH;

        emit NewMaximumPriceMEOWLInWETH(_newMaxPriceMEOWLInWETH);
    }

    /**
     * @notice Adjust threshold amount for periodic Uniswap v3 WETH --> MEOWL conversion
     * @param _newThresholdAmount new threshold amount (in WETH)
     * @dev Only callable by owner
     */
    function updateThresholdAmount(
        uint256 _newThresholdAmount
    ) external onlyOwner {
        thresholdAmount = _newThresholdAmount;

        emit NewThresholdAmount(_newThresholdAmount);
    }

    /**
     * @notice Pause
     * @dev Only callable by owner
     */
    function pause() external onlyOwner whenNotPaused {
        _pause();
    }

    /**
     * @notice Unpause
     * @dev Only callable by owner
     */
    function unpause() external onlyOwner whenPaused {
        _unpause();
    }

    /**
     * @notice Calculate price of one share (in MEOWL token)
     * Share price is expressed times 1e18
     */
    function calculateSharePriceInMEOWL() external view returns (uint256) {
        uint256 totalAmountStakedWithAggregator = feeSharingSystem.balanceOf(
            address(this)
        );

        return
            totalShares == 0
                ? MINIMUM_DEPOSIT_MEOWL
                : (totalAmountStakedWithAggregator * MINIMUM_DEPOSIT_MEOWL) /
                    (totalShares);
    }

    /**
     * @notice Calculate price of one share (in prime share)
     * Share price is expressed times 1e18
     */
    function calculateSharePriceInPrimeShare() external view returns (uint256) {
        uint256 totalNumberPrimeShares = feeSharingSystem.balanceOf(
            address(this)
        );

        return
            totalShares == 0
                ? MINIMUM_DEPOSIT_MEOWL
                : (totalNumberPrimeShares * MINIMUM_DEPOSIT_MEOWL) /
                    totalShares;
    }

    /**
     * @notice Calculate shares value of a user (in MEOWL)
     * @param user address of the user
     */
    function calculateSharesValueInMEOWL(
        address user
    ) external view returns (uint256) {
        uint256 totalAmountStakedWithAggregator = feeSharingSystem.balanceOf(
            address(this)
        );

        return
            totalShares == 0
                ? 0
                : (totalAmountStakedWithAggregator * userInfo[user]) /
                    totalShares;
    }

    /**
     * @notice Harvest pending WETH, sell them to MEOWL, and deposit MEOWL (if possible)
     */
    function _harvestAndSellAndCompound() internal {
        // Try/catch to prevent revertions if nothing to harvest
        try feeSharingSystem.getReward() {} catch {}

        uint256 amountToSell = rewardToken.balanceOf(address(this));

        if (amountToSell >= thresholdAmount) {
            bool isExecuted = _sellRewardTokenToMEOWL(amountToSell);

            if (isExecuted) {
                uint256 adjustedAmount = meowl.balanceOf(address(this));

                if (adjustedAmount >= MINIMUM_DEPOSIT_MEOWL) {
                    feeSharingSystem.stake(adjustedAmount);
                }
            }
        }

        // Adjust last harvest block
        lastHarvestBlock = block.number;
    }

    /**
     * @notice Sell WETH to MEOWL
     * @param _amount amount of rewardToken to convert (WETH)
     * @return whether the transaction went through
     */
    function _sellRewardTokenToMEOWL(uint256 _amount) internal returns (bool) {
        uint256 amountOutMinimum = maxPriceMEOWLInWETH != 0
            ? (_amount * 1e18) / maxPriceMEOWLInWETH
            : 0;

        address[] memory path = new address[](2);
        path[0] = address(rewardToken);
        path[1] = address(meowl);

        uint startBal = meowl.balanceOf(address(this));
        // Swap
        try
            uniswapRouter.swapExactTokensForTokensSupportingFeeOnTransferTokens(
                _amount,
                amountOutMinimum,
                path,
                address(this),
                block.timestamp
            )
        {
            uint amountOut = meowl.balanceOf(address(this)) - startBal;
            emit ConversionToMEOWL(_amount, amountOut);
            return true;
        } catch {
            emit FailedConversion();
            return false;
        }
    }

    /**
     * @notice Withdraw shares
     * @param _shares number of shares to redeem
     * @dev The difference between the two snapshots of MEOWL balances is used to know how many tokens to transfer to user.
     */
    function _withdraw(uint256 _shares) internal {
        if (
            block.number > (lastHarvestBlock + harvestBufferBlocks) &&
            canHarvest
        ) {
            _harvestAndSellAndCompound();
        }

        // Take snapshot of current MEOWL balance
        uint256 previousBalanceMEOWL = meowl.balanceOf(address(this));

        // Fetch total number of prime shares
        uint256 totalNumberPrimeShares = feeSharingSystem.balanceOf(
            address(this)
        );

        // Calculate number of prime shares to redeem based on existing shares (from this contract)
        uint256 currentNumberPrimeShares = (totalNumberPrimeShares * _shares) /
            totalShares;

        // Adjust number of shares for user/total
        userInfo[msg.sender] -= _shares;
        totalShares -= _shares;

        // Withdraw amount equivalent in prime shares
        feeSharingSystem.withdraw(currentNumberPrimeShares);

        // Calculate the difference between the current balance of MEOWL with the previous snapshot
        uint256 amountToTransfer = meowl.balanceOf(address(this)) -
            previousBalanceMEOWL;

        // Transfer the MEOWL amount back to user
        meowl.safeTransfer(msg.sender, amountToTransfer);

        emit Withdraw(msg.sender, amountToTransfer);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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. 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 {
        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 v4.7.0) (security/Pausable.sol)

pragma solidity ^0.8.0;

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

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        require(!paused(), "Pausable: paused");
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        require(paused(), "Pausable: not paused");
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
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;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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 (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using Address for address;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

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

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // Look for revert reason and bubble it up if present
        if (returndata.length > 0) {
            // The easiest way to bubble the revert reason is using memory via assembly
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// 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;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IRewardsDistribution {
    function notifyRewardAmount(uint256 reward) external;

    function totalSupply() external view returns (uint256);

    function stakingToken() external view returns (IERC20);

    function rewardsToken() external view returns (IERC20);

    function balanceOf(address account) external view returns (uint256);

    function stake(uint256 amount) external;

    function withdraw(uint256 amount) external;

    function getReward() external;
}

// SPDX-License-Identifier: AGPL-3.0-only

pragma solidity ^0.8.19;

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

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB, uint256 liquidity);

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

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

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

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

{
  "viaIR": true,
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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000000000000000000000000679a376dab6318d62de3c87292e207532c8607a90000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d

-----Decoded View---------------
Arg [0] : _feeSharingSystem (address): 0x679A376Dab6318d62DE3C87292e207532c8607a9
Arg [1] : _uniswapRouter (address): 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000679a376dab6318d62de3c87292e207532c8607a9
Arg [1] : 0000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d