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/**
 * SuperStake: Hex
 * 
 * https://superstake.win
 */
//SPDX-License-Identifier: UNLICENSED

pragma solidity ^0.8.15;

import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@uniswap/v2-core/contracts/interfaces/IERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Factory.sol";
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IWETH.sol";
import "@uniswap/v3-core/contracts/interfaces/pool/IUniswapV3PoolImmutables.sol";

import "@openzeppelin/contracts/utils/math/SafeMath.sol";

import "@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol";
import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

import "./DPT/TokenDividendTracker.sol";
import "./SimpleStakingImpl.sol";
import "./IMultisend.sol";
import "./ArbUtils.sol";
// Seriously if you audit this and ping it for "no safemath used" you're gonna out yourself as an idiot
// SafeMath is by default included in solidity 0.8, I've only included it for the transferFrom

contract SuperStake is Context, IERC20, Ownable, IERC20Permit, IMultisend {
    /** START OF EIP2612/EIP712 VARS */
    
    using Counters for Counters.Counter;

    mapping(address => Counters.Counter) private _nonces;

    /* solhint-disable var-name-mixedcase */
    // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
    // invalidate the cached domain separator if the chain id changes.
    bytes32 private immutable _CACHED_DOMAIN_SEPARATOR;
    uint256 private immutable _CACHED_CHAIN_ID;
    address private immutable _CACHED_THIS;

    bytes32 private immutable _HASHED_NAME;
    bytes32 private immutable _HASHED_VERSION;
    bytes32 private immutable _TYPE_HASH;

    /** END OF EIP2612/EIP712 VARS */
    
    event ArbitragedPools(uint256 amount, bool wasUsdcLower);
    event Bought(address indexed buyer, uint256 amount);
    event Sold(address indexed seller, uint256 amount);

    event Minted(uint256 amount);
    event Burned(uint256 amount);

    using SafeMath for uint256;
    // Constants
    string private constant _name = "SuperStake: Hex";
    string private constant _symbol = "SSH";
    string private constant _max = "SSH: MAX";
    string private constant _reinit = "SSH: REINIT";
    // Standard decimals
    uint8 private constant _decimals = 9;
    // 55.55m
    uint256 private constant initialSupply = 55550000 * 10**9;
    // The actual current supply
    uint256 public currentSupply;
    // USDC
    address private _usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
    address private constant _dead = 0x000000000000000000000000000000000000dEaD;

    address private _wnative;
    // Mappings
    mapping(address => uint256) private tokensOwned;
    mapping(address => mapping(address => uint256)) private _allowances;

    struct mappingStructs {
        bool _isExcludedFromFee;
        bool _bots;
        uint32 _lastTxBuy;
        uint32 _lastTxSell;
        uint32 botBlock;
        bool isLPPair;
        bool isInitialLP;
    }
    
    struct LaggedLPData {
        address lpAddr;
        uint112 reserve0;
        uint112 reserve1;
        uint256 laggedBurnAmt;
    }

    mapping(address => mappingStructs) private mappedAddresses;

    mapping(address => uint256) private airdropTokens;

    // Arrays
    address[] private airdropPrivateList;
    address[] private lpPairs;

    address[] private initialLPPairs;

    // Global variables

    uint256 private laggedBurnAmt;

    LaggedLPData private laggedLP;

    uint256 public currentChainId;

    // Block
    address public dividendTracker;
    // Default
    uint32 private gasForProcessing = 300000;
    uint32 private hexStakingRatio = 2500;
    bool private disableAddToBlocklist = false;
    bool private removedLimits = false;
    // 8 bits remaining

    // Block of 256 bits
    uint32 private openBlock;
    uint32 private pair1Pct = 50; 
    // Storage block closed

    // Block of 256 bits
    address public stakingImpl;
    // Tax distribution ratios
    uint32 private hexRewardRatio = 5000;
    // 64 bits remaining
    // Storage block closed

    // Block of 256 bits
    // This is Hex
    address private rewardToken = 0x2b591e99afE9f32eAA6214f7B7629768c40Eeb39;
    uint32 private pair2Pct = 50;
    uint32 private buyInfl = 7500;
    uint32 private sellDefl = 9000;
    // Storage block closed

    // Block of 256 bits
    // 160 bits free

    bool private tradingOpen;
    bool private inSwap = false;
    bool private swapEnabled = false;
    bool private arbEnabled = true;
    // 8 bits free
    // Storage block closed


    IUniswapV2Router02 private uniswapV2Router;



    constructor(address router) {
        uniswapV2Router = IUniswapV2Router02(router);
        // Set up EIP712
        bytes32 hashedName = keccak256(bytes(_name));
        bytes32 hashedVersion = keccak256(bytes("1"));
        bytes32 typeHash = keccak256(
            "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
        );
        _HASHED_NAME = hashedName;
        _HASHED_VERSION = hashedVersion;
        _CACHED_CHAIN_ID = block.chainid;
        _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion);
        _CACHED_THIS = address(this);
        _TYPE_HASH = typeHash;



        tokensOwned[_msgSender()] = initialSupply;
        currentSupply = initialSupply;
        
        // Set up the dividends
        TokenDividendTracker tracker = new TokenDividendTracker(rewardToken, 1000000000);

        dividendTracker = address(tracker);
        // Create the SimpleStakingImpl
        
        // This addr is Hedron
        SimpleStakingImpl staker = new SimpleStakingImpl(rewardToken, 60, dividendTracker, address(0x3819f64f282bf135d62168C1e513280dAF905e06), router);
        stakingImpl = address(staker);
        tracker.setStakingImpl(stakingImpl);
        // Handle exclusion from dividends
        
        tracker.excludeFromDividends(dividendTracker);
        tracker.excludeFromDividends(address(this));
        tracker.excludeFromDividends(owner());
        tracker.excludeFromDividends(_dead);

        // Save chain ID
        currentChainId = block.chainid;

        // Create the staking contract


        // Set the struct values
        mappedAddresses[_msgSender()] = mappingStructs({
            _isExcludedFromFee: true,
            _bots: false,
            _lastTxBuy: 0,
            _lastTxSell: 0,
            botBlock: 0,
            isLPPair: false,
            isInitialLP: false
        });
        mappedAddresses[address(this)] = mappingStructs({
            _isExcludedFromFee: true,
            _bots: false,
            _lastTxBuy: 0,
            _lastTxSell: 0,
            botBlock: 0,
            isLPPair: false,
            isInitialLP: false
        });
        mappedAddresses[dividendTracker] = mappingStructs({
            _isExcludedFromFee: true,
            _bots: false,
            _lastTxBuy: 0,
            _lastTxSell: 0,
            botBlock: 0,
            isLPPair: false,
            isInitialLP: false
         });
        emit Transfer(address(0), _msgSender(), initialSupply);
        
    }


    function name() public pure returns (string memory) {
        return _name;
    }

    function symbol() public pure returns (string memory) {
        return _symbol;
    }

    function decimals() public pure returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return currentSupply;
    }

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

    // These functions are to inflate/deflate supply on buys/sells as per the tokenomics
    function _increaseSupply(uint256 amt) internal {
        currentSupply += amt;
        tokensOwned[address(this)] += amt;
        emit Transfer(address(0), address(this), amt);
        emit Minted(amt);
    }
    
    function _decreaseSupply(uint256 amt, address lpToBurn) internal {
        currentSupply -= amt;
        tokensOwned[lpToBurn] -= amt;
        IUniswapV2Pair(lpToBurn).sync();
        emit Transfer(lpToBurn, address(0), amt);
        emit Burned(amt); 
    }



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

    function allowance(address owner, address spender)
        public
        view
        override
        returns (uint256)
    {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount)
        public
        override
        returns (bool)
    {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        
        _transfer(sender, recipient, amount);

        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(
                amount,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        return true;
    }


    /// @notice Starts trading. Only callable by owner.                                                                                                                                          
    function openTrading(address nativeWrapped) public onlyOwner {
        require(!tradingOpen, "OPEN");
        _wnative = nativeWrapped;
        // Exclude the router from dividends
        TokenDividendTracker(dividendTracker).excludeFromDividends(address(uniswapV2Router));
        
        _approve(address(this), address(uniswapV2Router), type(uint256).max);
        address uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())
            .createPair(address(this), _wnative);
        // Create a USDC pair - this is to provide a second pool to process taxes through
        address uniswapV2Pair2 = IUniswapV2Factory(uniswapV2Router.factory())
            .createPair(
                address(this),
                _usdc
            );
        // Exclude both pairs
        TokenDividendTracker(dividendTracker).excludeFromDividends(address(uniswapV2Pair));
        TokenDividendTracker(dividendTracker).excludeFromDividends(address(uniswapV2Pair2));
        // Add Pair1Pct of the eth and LP to the first (ETH) pair
        uint256 pair1TAmt = (balanceOf(address(this)) * pair1Pct) / 100;
        uint256 pair2TAmt = (balanceOf(address(this)) * pair2Pct) / 100;
        uint256 pair1EAmt = (address(this).balance);
        //uint256 pair2EAmt = (address(this).balance * pair2Pct) / 100;
        
        uniswapV2Router.addLiquidityETH{value: pair1EAmt}(
            address(this),
            pair1TAmt,
            0,
            0,
            owner(),
            block.timestamp
        );
        // Swap the pair2Pct eth amount for USDC
        /*address[] memory path = new address[](2);
        path[0] = _wnative;
        path[1] = _usdc;
        uniswapV2Router.swapExactETHForTokens{value: pair2EAmt}(
            0,
            path,
            address(this),
            block.timestamp
        );*/
        // Approve the USDC spend
        IERC20 usdc = IERC20(_usdc);
        // Actually get our balance
        uint256 pair2UAmt = usdc.balanceOf(address(this));
        usdc.approve(address(uniswapV2Router), pair2UAmt);
        // Create a token/usdc pool
        uniswapV2Router.addLiquidity(
            _usdc,
            address(this),
            pair2UAmt,
            pair2TAmt,
            0,
            0,
            owner(),
            block.timestamp
        );
        swapEnabled = true;
        tradingOpen = true;
        openBlock = uint32(block.number);
        IERC20(uniswapV2Pair).approve(
            address(uniswapV2Router),
            type(uint256).max
        );
        IERC20(uniswapV2Pair2).approve(
            address(uniswapV2Router),
            type(uint256).max
        );
        // Add the pairs to the list 
        mappedAddresses[uniswapV2Pair] = mappingStructs({
            _isExcludedFromFee: false,
            _bots: false,
            _lastTxBuy: 0,
            _lastTxSell: 0,
            botBlock: 0,
            isLPPair: true,
            isInitialLP: true
        });
        mappedAddresses[uniswapV2Pair2] = mappingStructs({
            _isExcludedFromFee: false,
            _bots: false,
            _lastTxBuy: 0,
            _lastTxSell: 0,
            botBlock: 0,
            isLPPair: true,
            isInitialLP: true
        });
        // Add to LP pair list
        lpPairs.push(uniswapV2Pair);
        lpPairs.push(uniswapV2Pair2);

        // Add to initial LP pair list
        initialLPPairs.push(uniswapV2Pair);
        initialLPPairs.push(uniswapV2Pair2);
        
    }

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

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

        uint32 _flAmt;
        bool isSell = false;
        
        if (
            from != owner() &&
            to != owner() &&
            from != address(this) &&
            !mappedAddresses[to]._isExcludedFromFee &&
            !mappedAddresses[from]._isExcludedFromFee
        ) {
            require(
                !mappedAddresses[to]._bots && !mappedAddresses[from]._bots,
                "SSH: Blocklisted."
            );
            

            if (mappedAddresses[from].isLPPair) {
                // buy, or LP remove
                
                // Make a distinction between the two
                IUniswapV2Pair lpPair = IUniswapV2Pair(from);
                if(lpPair.token0() == address(this)) {
                    // Token1 is other pair
                    IERC20 otherTok = IERC20(lpPair.token1());
                    (, uint112 reserve1,) = lpPair.getReserves();
                    if(otherTok.balanceOf(from) > reserve1) {
                        // Means balance is going up of the other token - this must be a buy
                        _flAmt = buyInfl;
                        // Only allow one type of operation - buy, or sell, per tx
                        require(mappedAddresses[to]._lastTxSell != uint32(block.number), "SSH: SWCH");
                        mappedAddresses[to]._lastTxBuy = uint32(block.number);
                    } else {
                        // Either balance is going down of the other token, hasn't been sent yet (never true for a buy, but definitely the case if we're token0 on a LP removal) - if we get here, this is a LP removal
                        _flAmt = 0;
                    }
                } else {
                    // Token0 is the other token
                    IERC20 otherTok = IERC20(lpPair.token0());
                    (uint112 reserve0, ,) = lpPair.getReserves();
                    if(otherTok.balanceOf(from) > reserve0) {
                        // Balance going up on other token - must be a buy
                        _flAmt = buyInfl;
                        // Only allow one type of operation - buy, or sell, per tx
                        require(mappedAddresses[to]._lastTxSell != uint32(block.number), "SSH: SWCH");
                        mappedAddresses[to]._lastTxBuy = uint32(block.number);
                    } else {
                        // Either balance is going down of the other token or hasn't been sent yet (never true for a buy or if SSH is token1) - if we get here, this is a LP removal
                        _flAmt = 0;
                    }
                }
               
            } else if (mappedAddresses[to].isLPPair) {
                // Sell, or LP add
                
                // Checks if it's either forkController or chain ID matches
                isSell = true;
                _flAmt = sellDefl;
                // Only allow one type of operation - buy, or sell, per tx
                require(mappedAddresses[from]._lastTxBuy != uint32(block.number), "SSH: SWCH");
                mappedAddresses[from]._lastTxSell = uint32(block.number);
            } else {
                // No inflation/deflation on transfers
                _flAmt = 0;
                // Check if this is going to become a new LP
                uint8 lpType = isNewLP(to);
                require(lpType != 2, "SSH: No v3 LP.");
                if(lpType == 1) {
                    // V2 LP, so add the "to" address to the LP list for tracking
                    mappedAddresses[to].isLPPair = true;
                    lpPairs.push(to);
                    TokenDividendTracker(dividendTracker).excludeFromDividends(to);
                } else {
                    // All good
                }
            }

        } else {
            // Only make it here if it's from or to owner, contract address, or something excluded from inflation/deflation - so inflation amt is 0 and no fork restrictions
            _flAmt = 0;
        }

        _tokenTransfer(from, to, amount, _flAmt, isSell);
    }


    function doTaxes(uint256 tokenAmount, bool useEthPair) private {
        // Reentrancy guard/stop infinite tax sells mainly
        inSwap = true;
        if(_allowances[address(this)][address(uniswapV2Router)] < tokenAmount) {
            // Our approvals run low, redo it
            _approve(address(this), address(uniswapV2Router), type(uint256).max);
        }

        uint256 sellAmt = tokenAmount;
        
        if (useEthPair) {
            address[] memory path = new address[](3);
            path[0] = address(this);
            path[1] = _wnative;
            path[2] = rewardToken;
            // Swap direct to Hex

            uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
                sellAmt,
                0,
                path,
                address(this),
                block.timestamp
            );
        } else {
            // Use a 3 point path to run the sells via the USDC pools
            address[] memory path = new address[](4);
            path[0] = address(this);
            // USDC
            path[1] = _usdc;
            path[2] = _wnative;
            path[3] = rewardToken;
            // Swap our tokens to WETH using the this->USDC->WETH path
            uniswapV2Router.swapExactTokensForTokensSupportingFeeOnTransferTokens(
                sellAmt,
                0,
                path,
                address(this),
                block.timestamp
            );
        }
        // This fixes gas reprice issues - reentrancy is not an issue as the fee wallets are trusted.
        // Using a uint64 prevents an edge case where these uint32's could overflow and cause failure
        // burnRatio and lp rationot here as they don't make it to ETH
        uint64 divisor = hexRewardRatio + hexStakingRatio;
        
        IERC20 hexToken = IERC20(rewardToken);
        uint256 hexAmount = hexToken.balanceOf(address(this));
        // Send them, split as required
        hexToken.transfer(stakingImpl, (hexAmount * hexStakingRatio) / divisor);
        SimpleStakingImpl(stakingImpl).afterReceivedHex();
        hexToken.transfer(dividendTracker, (hexAmount * hexRewardRatio) / divisor);
        TokenDividendTracker(dividendTracker).afterReceivedHex((hexAmount * hexRewardRatio) / divisor);
        
        inSwap = false;
    }

    receive() external payable {}

    /// @notice Sets if arb is enabled or not. Only callable by owner.
    /// @param enabled if arb is enabled or not.
    function setArbEnabled(bool enabled) external onlyOwner {
        arbEnabled = enabled;
    }

    function doLaggedBurn(bool isSell, address sender) internal {
        if(laggedBurnAmt > 0) {
            // Need to determine if last "sell" was actually a LP add, and if so, discard
            {
                // Determine which token we are in the LP
                
                IUniswapV2Pair lpPair = IUniswapV2Pair(laggedLP.lpAddr);
                
                (uint112 reserve0, uint112 reserve1,) = lpPair.getReserves();
                
                
                if(laggedLP.reserve0 < reserve0 && laggedLP.reserve1 < reserve1) {
                    // Reserve0 went up and so did reserve1 - surely the only case this can occur on is a lp add, so wipe the burn
                    if(laggedBurnAmt <= laggedLP.laggedBurnAmt) {
                        laggedBurnAmt = 0;
                    } else {
                        laggedBurnAmt -= laggedLP.laggedBurnAmt;
                    }
                    delete(laggedLP);
                    return;

                }
                
                
            }
            
            // Determine the best pool to burn from
            if(isSell) {
                
                uint8 best = 0;
                uint256 lastBal;
                for(uint8 i = 0; i < lpPairs.length; i++) {
                    // Only add pools with a balance of our tokens for burn
                    if(lpPairs[i] != sender && tokensOwned[(lpPairs[i])] > 0) {
                        
                        if(lastBal == 0) {
                            lastBal = tokensOwned[(lpPairs[i])];
                            best = i;
                        } else {
                            if(lastBal < tokensOwned[lpPairs[i]]) {
                                best = i;
                                lastBal = tokensOwned[lpPairs[i]];
                            }
                        }
                    }
                }
                // Unset laggedLP if it's set
                
                delete(laggedLP);
                if(lastBal < laggedBurnAmt) {
                    
                    // Don't burn if there's too many tokens to burn scheduled - they'll get caught up later on.
                    return;
                } else {
                    
                    _decreaseSupply(laggedBurnAmt, lpPairs[best]);
                    // Unset the lagged burn amount - no gas cost to unset and then re-set vs just re-setting, and a gas refund if it's a buy
                    laggedBurnAmt = 0; 
                }
                              
            } else {
                
                uint8 best = 0;
                uint256 lastBal;
                for(uint8 i = 0; i < lpPairs.length; i++) {
                    if(lpPairs[i] != sender && tokensOwned[(lpPairs[i])] > 0) {
                        
                        if(lastBal == 0) {
                            best = i;
                            lastBal = tokensOwned[lpPairs[i]];
                            
                        } else {
                            if(lastBal < tokensOwned[lpPairs[i]]) {
                                best = i;
                                lastBal = tokensOwned[lpPairs[i]];
                            }
                        }
                    }
                }
                
                // Unset laggedLP if it's set
                delete(laggedLP);
                if(tokensOwned[lpPairs[best]] < laggedBurnAmt) {
                    
                    // Don't burn if there's too many tokens to burn scheduled - they'll get caught up later on.
                    return;
                    
                } else {
                    _decreaseSupply(laggedBurnAmt, lpPairs[best]);
                    // Unset the lagged burn amount - no gas cost to unset and then re-set vs just re-setting, and a gas refund if it's a buy
                    laggedBurnAmt = 0;
                }
            }
        }
    }

    // Underlying transfer functions go here
    function _tokenTransfer(
        address sender,
        address recipient,
        uint256 amount,
        uint32 _flAmt,
        bool isSell
    ) private {
        
        doLaggedBurn(isSell, sender);
        

        // Do the normal tax setup
        uint256 taxAmount = calculateTaxesFee(amount, _flAmt);

        if(isSell) {
            TokenDividendTracker(dividendTracker).process(gasForProcessing);
            if (taxAmount > 0) {
                // Add tokens to burn queue
                
                laggedBurnAmt += taxAmount;
                
                // Save old data to be monitored on next tx
                {
                    IUniswapV2Pair lpPair = IUniswapV2Pair(recipient);
                    (uint112 reserve0, uint112 reserve1, ) = lpPair.getReserves();
                    laggedLP = LaggedLPData(recipient, reserve0, reserve1, amount);
                }
                if(arbEnabled) {
                    internalArb(true);
                }
            }
            emit Sold(sender, amount);
        } else {
            if (taxAmount > 0) {
                // Emit tokens to us
                _increaseSupply(taxAmount);
                // Sell the tokens - work out what pool is being used as the trade pool
                address uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())
                    .getPair(address(this), _wnative);
                // Work out where tokens are going to
                bool useWETH;
                if(sender == uniswapV2Pair) {
                    useWETH = false;
                } else if (recipient == uniswapV2Pair) {
                    useWETH = false;
                } else {
                    useWETH = true;
                }
                doTaxes(taxAmount, useWETH);
            }
            emit Bought(recipient, amount);
        }
        // Actually send tokens
        tokensOwned[sender] = tokensOwned[sender] - amount;
        tokensOwned[recipient] = tokensOwned[recipient] + amount;
        // Do the dividendtracking
        try TokenDividendTracker(dividendTracker).setBalance(payable(sender), tokensOwned[sender]) {} catch {}
        try TokenDividendTracker(dividendTracker).setBalance(payable(recipient), tokensOwned[recipient]) {} catch {}
        // Emit transfers, because the specs say to
        emit Transfer(sender, recipient, amount);
    }


    function internalArb(bool automatic) internal {
        address uniswapV2PairW = IUniswapV2Factory(uniswapV2Router.factory()).getPair(address(this), _wnative);
        address uniswapV2PairU = IUniswapV2Factory(uniswapV2Router.factory()).getPair(address(this), _usdc);
        // Determine if we should do arb - is it out of alignment 
        address[] memory path = new address[](2);
        path[0] = _usdc;
        path[1] = _wnative;
        // Get a quote for USDC pool value in WETH
        uint256[] memory quoteOut = uniswapV2Router.getAmountsOut(IERC20(_usdc).balanceOf(uniswapV2PairU), path);
        // The price of a token (without decimals), in wei, in the USDC pool
        uint256 usdcPoolTokenWeiPrice = quoteOut[1]/tokensOwned[uniswapV2PairU];
        // The price of a token (without decimals), in wei, in the WETH pool
        uint256 wethPoolTokenWeiPrice =  IERC20(_wnative).balanceOf(uniswapV2PairW)/tokensOwned[uniswapV2PairW];
        // Check if the wethPoolPrice is more than 15% above the usdcPoolPrice, or if the usdcPoolPrice is more than 15% above the wethPoolPrice
        if(!automatic || wethPoolTokenWeiPrice >= (usdcPoolTokenWeiPrice*23/20) || usdcPoolTokenWeiPrice >= (wethPoolTokenWeiPrice*23/20)) {
            // Calculate the arb to do
            (uint256 amountTokens, bool isUsdcLower) = ArbUtils.calculateArbitrage(_wnative, uniswapV2PairU, uniswapV2PairW, address(this), quoteOut[1], usdcPoolTokenWeiPrice, wethPoolTokenWeiPrice);
            if(isUsdcLower) {
                // Take tokens from the USDC pair
                // Make sure there's enough tokens to move
                if(tokensOwned[uniswapV2PairU] > amountTokens) {
                    tokensOwned[uniswapV2PairU] = tokensOwned[uniswapV2PairU] - amountTokens;
                    tokensOwned[uniswapV2PairW] = tokensOwned[uniswapV2PairW] + amountTokens;
                } else {
                    // Error condition, we shouldn't see this - but using the second x from the quadratic seems to do it.
                }
            } else {
                // Take tokens from the WETH pair
                // Make sure there's enough tokens to move
                if(tokensOwned[uniswapV2PairW] > amountTokens) {
                    tokensOwned[uniswapV2PairW] = tokensOwned[uniswapV2PairW] - amountTokens;
                    tokensOwned[uniswapV2PairU] = tokensOwned[uniswapV2PairU] + amountTokens;
                } else {
                    // Error condition, we shouldn't see this - but using the second x from the quadratic seems to do it.
                }
            }
            // Sync the pairs
            IUniswapV2Pair(uniswapV2PairU).sync();
            IUniswapV2Pair(uniswapV2PairW).sync();
            emit ArbitragedPools(amountTokens, isUsdcLower);
        }

    }




    function updateGasForProcessing(uint32 newValue) external onlyOwner {
        require(newValue >= 200000 && newValue <= 500000, "200,000 < GFP < 500,000");
        require(newValue != gasForProcessing, "Same");
        gasForProcessing = newValue;
    }

    function updateClaimWait(uint256 claimWait) external onlyOwner {
        TokenDividendTracker(dividendTracker).updateClaimWait(claimWait);
    }


    function excludeFromDividends(address account) external onlyOwner{
        TokenDividendTracker(dividendTracker).excludeFromDividends(account);
    }



    function processDividendTracker(uint256 gas) external {
        TokenDividendTracker(dividendTracker).process(gas);
    }

    function claim() external {
        TokenDividendTracker(dividendTracker).processAccount(payable(msg.sender), false);
    }


    function calculateTaxesFee(uint256 _amount, uint32 _flAmt) private pure returns (uint256 tax) { 
        tax = (_amount * _flAmt) / 100000;
    }

    
    /// @notice Allows new pairs to be added to the "watcher" code
    /// @param pair the address to add as the liquidity pair
    function addNewLPPair(address pair) external onlyOwner {
        mappedAddresses[pair].isLPPair = true;
        lpPairs.push(pair);
    }

    /// @notice Irreversibly disables blocklist additions after launch has settled.
    /// @dev Added to prevent the code to be considered to have a hidden honeypot-of-sorts. 
    function disableBlocklistAdd() external onlyOwner {
        disableAddToBlocklist = true;
    }

    function isNewLP(address acc) internal view returns (uint8) {
        /**
         * The process of a LP being created is as follows:
         * The router calls a low-level _addLiquidity function
         * This function checks if a LP pair exists and if not, creates one
         * After that, it checks the ratio and if none, sets to desired, otherwise gets optimal
         * The rest doesn't matter
         * So our transfer is called after the creation of the contract, meaning we can identify it is a contract
         * 
         */
        if(Address.isContract(acc)) {
            /**
             * The next step of identifying if this is a LP is to attempt to probe the liquidity pair for its type
             * We may not want a v3 liquidity being created, for example, and could revert the transfer
             */
            IUniswapV2Pair testPair = IUniswapV2Pair(acc);
            try testPair.getReserves() {
                return 1;
            } catch {
                // Not v2 liq
                // v3 has "fee()" request
                IUniswapV3PoolImmutables test3Pair = IUniswapV3PoolImmutables(acc);
                try test3Pair.fee() {
                    return 2;
                } catch {
                    // Unknown contract type, not v2 or v3
                    return 0;
                }
            }

        } else {
            return 0;
        }

    }
    

    /// @notice Sets an account exclusion or inclusion from fees.
    /// @param account the account to change state on
    /// @param isExcluded the boolean to set it to
    function setExcludedFromFee(address account, bool isExcluded) external onlyOwner {
        mappedAddresses[account]._isExcludedFromFee = isExcluded;
    }
    
    /// @notice Sets the buy tax, out of 100000. Only callable by owner. Max of 20000.
    /// @param amount the tax out of 100000.
    function setBuyInfl(uint32 amount) external onlyOwner {
        require(amount <= 20000, "SSH: Max 20%.");
        buyInfl = amount;
    }

    /// @notice Sets the sell tax, out of 100000. Only callable by owner. Max of 20000.
    /// @param amount the tax out of 100000.
    function setSellDefl(uint32 amount) external onlyOwner {
        require(amount <= 20000, "SSH: Max 20%.");
        sellDefl = amount;
    }

    /// @notice Sets the staking ratio. Only callable by owner.
    /// @param amount staking ratio to set
    function setStakingRatio(uint32 amount) external onlyOwner {
        hexStakingRatio = amount;
    }
    /// @notice Sets the reward ratio. Only callable by owner.
    /// @param amount rward ratio to set
    function setRewardRatio(uint32 amount) external onlyOwner {
        hexRewardRatio = amount;
    }

    /// @notice Changes bot flag. Only callable by owner. Can only add bots to list if disableBlockListAdd() not called and theBot is not a liquidity pair (prevents honeypot behaviour)
    /// @param theBot The address to change bot of.
    /// @param toSet The value to set.
    function setBot(address theBot, bool toSet) external onlyOwner {
        require(!mappedAddresses[theBot].isLPPair, "SSH: FORBIDDEN");
        if(toSet) {
            require(!disableAddToBlocklist, "SSH: DISABLED");
        }
        mappedAddresses[theBot]._bots = toSet;
    }

    /// @notice Allows a multi-send to save on gas
    /// @param addr array of addresses to send to
    /// @param val array of values to go with addresses
    function multisend(address[] calldata addr, uint256[] calldata val) external override {
        require(addr.length == val.length, "SSH: MISMATCH");
        for(uint i = 0; i < addr.length; i++) {
            // There's gas savings to be had to do this - we bypass top-level checks
            _tokenTransfer(_msgSender(), addr[i], val[i], 0, false);
        }
    }
    /// @notice Allows a multi-send to save on gas on behalf of someone - need approvals
    /// @param sender sender to use - must be approved to spend
    /// @param addrRecipients array of addresses to send to
    /// @param vals array of values to go with addresses
    function multisendFrom(address sender, address[] calldata addrRecipients, uint256[] calldata vals) external override {
        require(addrRecipients.length == vals.length, "SSH: MISMATCH");
        for(uint i = 0; i < addrRecipients.length; i++) {
            // More gas savings as we bypass top-level checks - we have to do approval subs tho
            _tokenTransfer(sender, addrRecipients[i], vals[i], 0, false);
            _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(vals[i],"ERC20: transfer amount exceeds allowance"));
        }
    }
    
    function checkBot(address bot) external view returns(bool) {
        return mappedAddresses[bot]._bots;
    }

    /// @notice Returns if an account is excluded from fees.
    /// @param account the account to check
    function isExcludedFromFee(address account) external view returns (bool) {
        return mappedAddresses[account]._isExcludedFromFee;
    }
    
    /// @dev debug code to get the LP pairs
    function getLPPairs() external view returns (address[] memory lps) {
        lps = lpPairs;
    }
    
    
    /** START OF EIP2612/EIP712 FUNCTIONS */
    // These need to be here so it can access _approve, lol

    /**
     * @dev Returns the domain separator for the current chain.
     */
    function _domainSeparatorV4() internal view returns (bytes32) {
        if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) {
            return _CACHED_DOMAIN_SEPARATOR;
        } else {
            return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION);
        }
    }

    function _buildDomainSeparator(
        bytes32 typeHash,
        bytes32 nameHash,
        bytes32 versionHash
    ) private view returns (bytes32) {
        return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this)));
    }

    /**
     * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
     * function returns the hash of the fully encoded EIP712 message for this domain.
     *
     * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
     *
     * ```solidity
     * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
     *     keccak256("Mail(address to,string contents)"),
     *     mailTo,
     *     keccak256(bytes(mailContents))
     * )));
     * address signer = ECDSA.recover(digest, signature);
     * ```
     */
    function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
        return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash);
    }

    // solhint-disable-next-line var-name-mixedcase
    bytes32 private constant _PERMIT_TYPEHASH =
        keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    /**
     * @dev In previous versions `_PERMIT_TYPEHASH` was declared as `immutable`.
     * However, to ensure consistency with the upgradeable transpiler, we will continue
     * to reserve a slot.
     * @custom:oz-renamed-from _PERMIT_TYPEHASH
     */
    // solhint-disable-next-line var-name-mixedcase
    bytes32 private _PERMIT_TYPEHASH_DEPRECATED_SLOT;

    /**
     * @dev See {IERC20Permit-permit}.
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual override {
        require(block.timestamp <= deadline, "ERC20Permit: expired deadline");

        bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));

        bytes32 hash = _hashTypedDataV4(structHash);

        address signer = ECDSA.recover(hash, v, r, s);
        require(signer == owner, "ERC20Permit: invalid signature");
        _approve(owner, spender, value);
    }

    /**
     * @dev See {IERC20Permit-nonces}.
     */
    function nonces(address owner) public view virtual override returns (uint256) {
        return _nonces[owner].current();
    }

    /**
     * @dev See {IERC20Permit-DOMAIN_SEPARATOR}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view override returns (bytes32) {
        return _domainSeparatorV4();
    }

    /**
     * @dev "Consume a nonce": return the current value and increment.
     *
     * _Available since v4.1._
     */
    function _useNonce(address owner) internal virtual returns (uint256 current) {
        Counters.Counter storage nonce = _nonces[owner];
        current = nonce.current();
        nonce.increment();
    }
    /** END OF EIP2612/EIP712 FUNCTIONS */
}

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

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-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 v4.8.0) (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
     * ====
     *
     * [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://diligence.consensys.net/posts/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/v0.5.11/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
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)

pragma solidity ^0.8.0;

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented, decremented or reset. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 */
library Counters {
    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        unchecked {
            counter._value += 1;
        }
    }

    function decrement(Counter storage counter) internal {
        uint256 value = counter._value;
        require(value > 0, "Counter: decrement overflow");
        unchecked {
            counter._value = value - 1;
        }
    }

    function reset(Counter storage counter) internal {
        counter._value = 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/ECDSA.sol)

pragma solidity ^0.8.0;

import "../Strings.sol";

/**
 * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
 *
 * These functions can be used to verify that a message was signed by the holder
 * of the private keys of a given address.
 */
library ECDSA {
    enum RecoverError {
        NoError,
        InvalidSignature,
        InvalidSignatureLength,
        InvalidSignatureS,
        InvalidSignatureV // Deprecated in v4.8
    }

    function _throwError(RecoverError error) private pure {
        if (error == RecoverError.NoError) {
            return; // no error: do nothing
        } else if (error == RecoverError.InvalidSignature) {
            revert("ECDSA: invalid signature");
        } else if (error == RecoverError.InvalidSignatureLength) {
            revert("ECDSA: invalid signature length");
        } else if (error == RecoverError.InvalidSignatureS) {
            revert("ECDSA: invalid signature 's' value");
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature` or error string. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     *
     * Documentation for signature generation:
     * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
     * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
     *
     * _Available since v4.3._
     */
    function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) {
        if (signature.length == 65) {
            bytes32 r;
            bytes32 s;
            uint8 v;
            // ecrecover takes the signature parameters, and the only way to get them
            // currently is to use assembly.
            /// @solidity memory-safe-assembly
            assembly {
                r := mload(add(signature, 0x20))
                s := mload(add(signature, 0x40))
                v := byte(0, mload(add(signature, 0x60)))
            }
            return tryRecover(hash, v, r, s);
        } else {
            return (address(0), RecoverError.InvalidSignatureLength);
        }
    }

    /**
     * @dev Returns the address that signed a hashed message (`hash`) with
     * `signature`. This address can then be used for verification purposes.
     *
     * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures:
     * this function rejects them by requiring the `s` value to be in the lower
     * half order, and the `v` value to be either 27 or 28.
     *
     * IMPORTANT: `hash` _must_ be the result of a hash operation for the
     * verification to be secure: it is possible to craft signatures that
     * recover to arbitrary addresses for non-hashed data. A safe way to ensure
     * this is by receiving a hash of the original message (which may otherwise
     * be too long), and then calling {toEthSignedMessageHash} on it.
     */
    function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, signature);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
     *
     * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address, RecoverError) {
        bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
        uint8 v = uint8((uint256(vs) >> 255) + 27);
        return tryRecover(hash, v, r, s);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
     *
     * _Available since v4.2._
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, r, vs);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Overload of {ECDSA-tryRecover} that receives the `v`,
     * `r` and `s` signature fields separately.
     *
     * _Available since v4.3._
     */
    function tryRecover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address, RecoverError) {
        // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
        // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
        // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
        // signatures from current libraries generate a unique signature with an s-value in the lower half order.
        //
        // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
        // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
        // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
        // these malleable signatures as well.
        if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
            return (address(0), RecoverError.InvalidSignatureS);
        }

        // If the signature is valid (and not malleable), return the signer address
        address signer = ecrecover(hash, v, r, s);
        if (signer == address(0)) {
            return (address(0), RecoverError.InvalidSignature);
        }

        return (signer, RecoverError.NoError);
    }

    /**
     * @dev Overload of {ECDSA-recover} that receives the `v`,
     * `r` and `s` signature fields separately.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal pure returns (address) {
        (address recovered, RecoverError error) = tryRecover(hash, v, r, s);
        _throwError(error);
        return recovered;
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from a `hash`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) {
        // 32 is the length in bytes of hash,
        // enforced by the type signature above
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
    }

    /**
     * @dev Returns an Ethereum Signed Message, created from `s`. This
     * produces hash corresponding to the one signed with the
     * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`]
     * JSON-RPC method as part of EIP-191.
     *
     * See {recover}.
     */
    function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s));
    }

    /**
     * @dev Returns an Ethereum Signed Typed Data, created from a
     * `domainSeparator` and a `structHash`. This produces hash corresponding
     * to the one signed with the
     * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`]
     * JSON-RPC method as part of EIP-712.
     *
     * See {recover}.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)

pragma solidity ^0.8.0;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    enum Rounding {
        Down, // Toward negative infinity
        Up, // Toward infinity
        Zero // Toward zero
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds up instead
     * of rounding down.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
     * with further edits by Uniswap Labs also under MIT license.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod0 := mul(x, y)
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            require(denominator > prod1);

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
            // See https://cs.stackexchange.com/q/138556/92363.

            // Does not overflow because the denominator cannot be zero at this stage in the function.
            uint256 twos = denominator & (~denominator + 1);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
            // in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(
        uint256 x,
        uint256 y,
        uint256 denominator,
        Rounding rounding
    ) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10, rounded down, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10**64) {
                value /= 10**64;
                result += 64;
            }
            if (value >= 10**32) {
                value /= 10**32;
                result += 32;
            }
            if (value >= 10**16) {
                value /= 10**16;
                result += 16;
            }
            if (value >= 10**8) {
                value /= 10**8;
                result += 8;
            }
            if (value >= 10**4) {
                value /= 10**4;
                result += 4;
            }
            if (value >= 10**2) {
                value /= 10**2;
                result += 2;
            }
            if (value >= 10**1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256, rounded down, of a positive value.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (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 v4.8.0) (utils/Strings.sol)

pragma solidity ^0.8.0;

import "./math/Math.sol";

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _SYMBOLS = "0123456789abcdef";
    uint8 private constant _ADDRESS_LENGTH = 20;

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        unchecked {
            uint256 length = Math.log10(value) + 1;
            string memory buffer = new string(length);
            uint256 ptr;
            /// @solidity memory-safe-assembly
            assembly {
                ptr := add(buffer, add(32, length))
            }
            while (true) {
                ptr--;
                /// @solidity memory-safe-assembly
                assembly {
                    mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
                }
                value /= 10;
                if (value == 0) break;
            }
            return buffer;
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        unchecked {
            return toHexString(value, Math.log256(value) + 1);
        }
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }

    /**
     * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
     */
    function toHexString(address addr) internal pure returns (string memory) {
        return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
    }
}

pragma solidity >=0.5.0;

interface IERC20 {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view 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);
}

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;
}

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);
}

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 IWETH {
    function deposit() external payable;
    function transfer(address to, uint value) external returns (bool);
    function withdraw(uint) external;
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.5.0;

/// @title Pool state that never changes
/// @notice These parameters are fixed for a pool forever, i.e., the methods will always return the same values
interface IUniswapV3PoolImmutables {
    /// @notice The contract that deployed the pool, which must adhere to the IUniswapV3Factory interface
    /// @return The contract address
    function factory() external view returns (address);

    /// @notice The first of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token0() external view returns (address);

    /// @notice The second of the two tokens of the pool, sorted by address
    /// @return The token contract address
    function token1() external view returns (address);

    /// @notice The pool's fee in hundredths of a bip, i.e. 1e-6
    /// @return The fee
    function fee() external view returns (uint24);

    /// @notice The pool tick spacing
    /// @dev Ticks can only be used at multiples of this value, minimum of 1 and always positive
    /// e.g.: a tickSpacing of 3 means ticks can be initialized every 3rd tick, i.e., ..., -6, -3, 0, 3, 6, ...
    /// This value is an int24 to avoid casting even though it is always positive.
    /// @return The tick spacing
    function tickSpacing() external view returns (int24);

    /// @notice The maximum amount of position liquidity that can use any tick in the range
    /// @dev This parameter is enforced per tick to prevent liquidity from overflowing a uint128 at any point, and
    /// also prevents out-of-range liquidity from being used to prevent adding in-range liquidity to a pool
    /// @return The max amount of liquidity per tick
    function maxLiquidityPerTick() external view returns (uint128);
}

/**
 * A bunch of arbitrage math utilities, some shamelessly borrowed from https://github.com/paco0x/amm-arbitrageur/ (specifically the quadratic and sqrt)
 * Some also cooked up by my insane mind
 * SPDX-License-Identifier: WTFPL
 * Licensed as per the amm-arbitrageur license, because it's really just a clone of that
 */
import "@uniswap/v2-core/contracts/interfaces/IUniswapV2Pair.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import "@uniswap/v2-core/contracts/interfaces/IERC20.sol";

pragma solidity ^0.8.15;

library ArbUtils {
    // USDC
    function calculateArbitrage(address _weth, address usdcP, address wethP, address token, uint256 quote, uint256 uptwp, uint256 wptwp) internal view returns (uint256 amount, bool isUsdcLower) {
        
        // We need to work out the "cheaper" of the two, with respect for the fact the USDC/WETH pool is needed
        {
            int256 a1;
            int256 b1;
            int256 a2;
            int256 b2;
            if(uptwp < wptwp) {
                // USDC price is under WETH price
                // Calculate a1,b2,a2,b2
                a1 = (int256) (quote);
                b1 = (int256) (IERC20(token).balanceOf(usdcP));
                a2 = (int256) (IERC20(_weth).balanceOf(wethP));
                b2 = (int256) (IERC20(token).balanceOf(wethP));
                isUsdcLower = true;
            } else {
               // WETH price is under USDC price
                // Calculate a1,b2,a2,b2
                a2 = (int256) (quote);
                b2 = (int256) (IERC20(token).balanceOf(usdcP));
                a1 = (int256) (IERC20(_weth).balanceOf(wethP));
                b1 = (int256) (IERC20(token).balanceOf(wethP));
                isUsdcLower = false;
            }
            // Divide a, b, and c by a big number and then multiply it back out 
            // the divisor is 9 (decimals of token) + 18 (eth decimals)
            int256 a = (a1 * b1 - a2 * b2)/(10**27);
            int256 b = (2 * b1 * b2 * (a1 + a2))/(10**27);
            int256 c = (b1 * b2 * (a1 * b2 - a2 * b1))/(10**27);
            (int256 x1,) = calcSolutionForQuadratic(a, b, c);
            // This calculates the amount required to get the two into sync - not maximum profit. 
            amount = uint256(x1) * 2;

        }

    }

    /// @dev find solution of quadratic equation: ax^2 + bx + c = 0, only return the positive solution
    function calcSolutionForQuadratic(
        int256 a,
        int256 b,
        int256 c
    ) public pure returns (int256 x1, int256 x2) {
        int256 m = b**2 - 4 * a * c;
        // m < 0 leads to complex number
        require(m > 0, 'ArbUtils: COMPLEX');

        int256 sqrtM = int256(sqrt(uint256(m)));
        x1 = (-b + sqrtM) / (2 * a);
        x2 = (-b - sqrtM) / (2 * a);
    }

    /// @dev Newton’s method for caculating square root of n
    function sqrt(uint256 n) internal pure returns (uint256 res) {
        assert(n > 1);

        // The scale factor is a crude way to turn everything into integer calcs.
        // Actually do (n * 10 ^ 4) ^ (1/2)
        uint256 _n = n * 10**6;
        uint256 c = _n;
        res = _n;

        uint256 xi;
        while (true) {
            xi = (res + c / res) / 2;
            // don't need be too precise to save gas
            if (res - xi < 1000) {
                break;
            }
            res = xi;
        }
        res = res / 10**3;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.15;

import "@uniswap/v2-core/contracts/interfaces/IERC20.sol";
import "./DividendPayingTokenInterface.sol";
import "./DividendPayingTokenOptionalInterface.sol";
import "./math/SafeMathUint.sol";
import "./math/SafeMathInt.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";


/// @title Dividend-Paying Token
/// @author Roger Wu (https://github.com/roger-wu)
/// @dev A mintable ERC20 token that allows anyone to pay and distribute tokens
///  to token holders as dividends and allows token holders to withdraw their dividends.
///  Reference: the source code of PoWH3D: https://etherscan.io/address/0xB3775fB83F7D12A36E0475aBdD1FCA35c091efBe#code
abstract contract DividendPayingToken is
    Ownable,
    DividendPayingTokenInterface,
    DividendPayingTokenOptionalInterface
{
    using SafeMath for uint256;
    using SafeMathUint for uint256;
    using SafeMathInt for int256;

    address public REWARD_TOKEN;
    address public stakingImpl;

    // With `magnitude`, we can properly distribute dividends even if the amount of received ether is small.
    // For more discussion about choosing the value of `magnitude`,
    //  see https://github.com/ethereum/EIPs/issues/1726#issuecomment-472352728
    uint256 internal constant magnitude = 2 ** 128;

    uint256 internal magnifiedDividendPerShare;

    mapping(address => uint256) private _balances;

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

    uint256 private _totalSupply;

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * 
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");
        _totalSupply += amount;
        _balances[account] += amount;

        magnifiedDividendCorrections[account] = magnifiedDividendCorrections[
            account
        ].sub((magnifiedDividendPerShare.mul(amount)).toInt256Safe());
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * 
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");
        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        magnifiedDividendCorrections[account] = magnifiedDividendCorrections[
            account
        ].add((magnifiedDividendPerShare.mul(amount)).toInt256Safe());
    }


    modifier onlySSHex() {
        
        require(_msgSender() == owner() || _msgSender() == stakingImpl, "Only senders.");
        _;
    }

    // About dividendCorrection:
    // If the token balance of a `_user` is never changed, the dividend of `_user` can be computed with:
    //   `dividendOf(_user) = dividendPerShare * balanceOf(_user)`.
    // When `balanceOf(_user)` is changed (via minting/burning/transferring tokens),
    //   `dividendOf(_user)` should not be changed,
    //   but the computed value of `dividendPerShare * balanceOf(_user)` is changed.
    // To keep the `dividendOf(_user)` unchanged, we add a correction term:
    //   `dividendOf(_user) = dividendPerShare * balanceOf(_user) + dividendCorrectionOf(_user)`,
    //   where `dividendCorrectionOf(_user)` is updated whenever `balanceOf(_user)` is changed:
    //   `dividendCorrectionOf(_user) = dividendPerShare * (old balanceOf(_user)) - (new balanceOf(_user))`.
    // So now `dividendOf(_user)` returns the same value before and after `balanceOf(_user)` is changed.
    mapping(address => int256) internal magnifiedDividendCorrections;
    mapping(address => uint256) internal withdrawnDividends;

    uint256 public totalDividendsDistributed;

    constructor(
        address _rewardTokenAddress
    )  {
        REWARD_TOKEN = _rewardTokenAddress;
        
    }

    function setStakingImpl(address impl) public onlyOwner {
        stakingImpl = impl;
    }

    function afterReceivedHex(uint256 amount) public onlySSHex {
        if (_totalSupply > 0 && amount > 0) {
            magnifiedDividendPerShare = magnifiedDividendPerShare.add(
                (amount).mul(magnitude) / _totalSupply
            );
            emit DividendsDistributed(msg.sender, amount);

            totalDividendsDistributed = totalDividendsDistributed.add(amount);
        }
    }

    /// @notice Withdraws the ether distributed to the sender.
    /// @dev It emits a `DividendWithdrawn` event if the amount of withdrawn ether is greater than 0.
    function withdrawDividend() public virtual override {
        _withdrawDividendOfUser(payable(msg.sender));
    }

    /// @notice Withdraws the ether distributed to the sender.
    /// @dev It emits a `DividendWithdrawn` event if the amount of withdrawn ether is greater than 0.
    function _withdrawDividendOfUser(
        address payable user
    ) internal returns (uint256) {
        uint256 _withdrawableDividend = withdrawableDividendOf(user);
        if (_withdrawableDividend > 0) {
            withdrawnDividends[user] = withdrawnDividends[user].add(
                _withdrawableDividend
            );
            emit DividendWithdrawn(user, _withdrawableDividend);
            bool success = IERC20(REWARD_TOKEN).transfer(
                user,
                _withdrawableDividend
            );

            if (!success) {
                withdrawnDividends[user] = withdrawnDividends[user].sub(
                    _withdrawableDividend
                );
                return 0;
            }

            return _withdrawableDividend;
        }

        return 0;
    }

    /// @notice View the amount of dividend in wei that an address can withdraw.
    /// @param _owner The address of a token holder.
    /// @return The amount of dividend in wei that `_owner` can withdraw.
    function dividendOf(address _owner) public view override returns (uint256) {
        return withdrawableDividendOf(_owner);
    }

    /// @notice View the amount of dividend in wei that an address can withdraw.
    /// @param _owner The address of a token holder.
    /// @return The amount of dividend in wei that `_owner` can withdraw.
    function withdrawableDividendOf(
        address _owner
    ) public view override returns (uint256) {
        return accumulativeDividendOf(_owner).sub(withdrawnDividends[_owner]);
    }

    /// @notice View the amount of dividend in wei that an address has withdrawn.
    /// @param _owner The address of a token holder.
    /// @return The amount of dividend in wei that `_owner` has withdrawn.
    function withdrawnDividendOf(
        address _owner
    ) public view override returns (uint256) {
        return withdrawnDividends[_owner];
    }

    /// @notice View the amount of dividend in wei that an address has earned in total.
    /// @dev accumulativeDividendOf(_owner) = withdrawableDividendOf(_owner) + withdrawnDividendOf(_owner)
    /// = (magnifiedDividendPerShare * balanceOf(_owner) + magnifiedDividendCorrections[_owner]) / magnitude
    /// @param _owner The address of a token holder.
    /// @return The amount of dividend in wei that `_owner` has earned in total.
    function accumulativeDividendOf(
        address _owner
    ) public view override returns (uint256) {
        return
            magnifiedDividendPerShare
                .mul(_balances[_owner])
                .toInt256Safe()
                .add(magnifiedDividendCorrections[_owner])
                .toUint256Safe() / magnitude;
    }

    /// @dev Internal function that transfer tokens from one address to another.
    /// Update magnifiedDividendCorrections to keep dividends unchanged.
    /// @param from The address to transfer from.
    /// @param to The address to transfer to.
    /// @param value The amount to be transferred.
    function _transfer(
        address from,
        address to,
        uint256 value
    ) internal virtual {
        require(false);

        int256 _magCorrection = magnifiedDividendPerShare
            .mul(value)
            .toInt256Safe();
        magnifiedDividendCorrections[from] = magnifiedDividendCorrections[from]
            .add(_magCorrection);
        magnifiedDividendCorrections[to] = magnifiedDividendCorrections[to].sub(
            _magCorrection
        );
    }

    function _setBalance(address account, uint256 newBalance) internal {
        uint256 currentBalance = _balances[account];

        if (newBalance > currentBalance) {
            uint256 mintAmount = newBalance.sub(currentBalance);
            _mint(account, mintAmount);
        } else if (newBalance < currentBalance) {
            uint256 burnAmount = currentBalance.sub(newBalance);
            _burn(account, burnAmount);
        }
    }
}

pragma solidity ^0.8.15;
// SPDX-License-Identifier: UNLICENSED


/// @title Dividend-Paying Token Interface
/// @author Roger Wu (https://github.com/roger-wu)
/// @dev An interface for a dividend-paying token contract.
interface DividendPayingTokenInterface {
  /// @notice View the amount of dividend in wei that an address can withdraw.
  /// @param _owner The address of a token holder.
  /// @return The amount of dividend in wei that `_owner` can withdraw.
  function dividendOf(address _owner) external view returns(uint256);

  /// @notice Distributes ether to token holders as dividends.
  /// @dev SHOULD distribute the paid ether to token holders as dividends.
  ///  SHOULD NOT directly transfer ether to token holders in this function.
  ///  MUST emit a `DividendsDistributed` event when the amount of distributed ether is greater than 0.
  function distributeDividends() external payable;

  /// @notice Withdraws the ether distributed to the sender.
  /// @dev SHOULD transfer `dividendOf(msg.sender)` wei to `msg.sender`, and `dividendOf(msg.sender)` SHOULD be 0 after the transfer.
  ///  MUST emit a `DividendWithdrawn` event if the amount of ether transferred is greater than 0.
  function withdrawDividend() external;

  /// @dev This event MUST emit when ether is distributed to token holders.
  /// @param from The address which sends ether to this contract.
  /// @param weiAmount The amount of distributed ether in wei.
  event DividendsDistributed(
    address indexed from,
    uint256 weiAmount
  );

  /// @dev This event MUST emit when an address withdraws their dividend.
  /// @param to The address which withdraws ether from this contract.
  /// @param weiAmount The amount of withdrawn ether in wei.
  event DividendWithdrawn(
    address indexed to,
    uint256 weiAmount
  );
}

pragma solidity ^0.8.15;
// SPDX-License-Identifier: UNLICENSED

/// @title Dividend-Paying Token Optional Interface
/// @author Roger Wu (https://github.com/roger-wu)
/// @dev OPTIONAL functions for a dividend-paying token contract.
interface DividendPayingTokenOptionalInterface {
  /// @notice View the amount of dividend in wei that an address can withdraw.
  /// @param _owner The address of a token holder.
  /// @return The amount of dividend in wei that `_owner` can withdraw.
  function withdrawableDividendOf(address _owner) external view returns(uint256);

  /// @notice View the amount of dividend in wei that an address has withdrawn.
  /// @param _owner The address of a token holder.
  /// @return The amount of dividend in wei that `_owner` has withdrawn.
  function withdrawnDividendOf(address _owner) external view returns(uint256);

  /// @notice View the amount of dividend in wei that an address has earned in total.
  /// @dev accumulativeDividendOf(_owner) = withdrawableDividendOf(_owner) + withdrawnDividendOf(_owner)
  /// @param _owner The address of a token holder.
  /// @return The amount of dividend in wei that `_owner` has earned in total.
  function accumulativeDividendOf(address _owner) external view returns(uint256);
}

pragma solidity ^0.8.15;
// SPDX-License-Identifier: UNLICENSED

/**
 * @title SafeMathInt
 * @dev Math operations with safety checks that revert on error
 * @dev SafeMath adapted for int256
 * Based on code of  https://github.com/RequestNetwork/requestNetwork/blob/master/packages/requestNetworkSmartContracts/contracts/base/math/SafeMathInt.sol
 */
library SafeMathInt {
  function mul(int256 a, int256 b) internal pure returns (int256) {
    // Prevent overflow when multiplying INT256_MIN with -1
    // https://github.com/RequestNetwork/requestNetwork/issues/43
    require(!(a == - 2**255 && b == -1) && !(b == - 2**255 && a == -1));

    int256 c = a * b;
    require((b == 0) || (c / b == a));
    return c;
  }

  function div(int256 a, int256 b) internal pure returns (int256) {
    // Prevent overflow when dividing INT256_MIN by -1
    // https://github.com/RequestNetwork/requestNetwork/issues/43
    require(!(a == - 2**255 && b == -1) && (b > 0));

    return a / b;
  }

  function sub(int256 a, int256 b) internal pure returns (int256) {
    require((b >= 0 && a - b <= a) || (b < 0 && a - b > a));

    return a - b;
  }

  function add(int256 a, int256 b) internal pure returns (int256) {
    int256 c = a + b;
    require((b >= 0 && c >= a) || (b < 0 && c < a));
    return c;
  }

  function toUint256Safe(int256 a) internal pure returns (uint256) {
    require(a >= 0);
    return uint256(a);
  }
}

pragma solidity ^0.8.15;
// SPDX-License-Identifier: UNLICENSED
/**
 * @title SafeMathUint
 * @dev Math operations with safety checks that revert on error
 */
library SafeMathUint {
  function toInt256Safe(uint256 a) internal pure returns (int256) {
    int256 b = int256(a);
    require(b >= 0);
    return b;
  }
}

import "./DividendPayingToken.sol";
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.15;
contract TokenDividendTracker is Ownable, DividendPayingToken {
    using SafeMath for uint256;
    using SafeMathInt for int256;

    struct MAP {
        address[] keys;
        mapping(address => uint) values;
        mapping(address => uint) indexOf;
        mapping(address => bool) inserted;
    }

    MAP private tokenHoldersMap;
    uint256 public lastProcessedIndex;

    mapping(address => bool) public excludedFromDividends;

    mapping(address => uint256) public lastClaimTimes;

    uint256 public claimWait;
    uint256 public minimumTokenBalanceForDividends;

    event ExcludeFromDividends(address indexed account);
    event ClaimWaitUpdated(uint256 indexed newValue, uint256 indexed oldValue);

    event Claim(
        address indexed account,
        uint256 amount,
        bool indexed automatic
    );

    constructor(
        address _rewardTokenAddress,
        uint256 _minimumTokenBalanceForDividends
    )
    
        DividendPayingToken(
            _rewardTokenAddress
        )
    {
        claimWait = 3600;
        minimumTokenBalanceForDividends = _minimumTokenBalanceForDividends;
    }

    function _transfer(
        address,
        address,
        uint256
    ) internal pure override {
        require(false, "DT: FORBIDDEN");
    }

    function withdrawDividend() public pure override {
        require(
            false,
            "DT: CLAIM."
        );
    }

    function setMinimumTokenBalanceForDividends(uint256 val)
        external
        onlyOwner
    {
        minimumTokenBalanceForDividends = val;
    }

    function excludeFromDividends(address account) external onlyOwner {
        require(!excludedFromDividends[account]);
        excludedFromDividends[account] = true;

        _setBalance(account, 0);
        MAPRemove(account);

        emit ExcludeFromDividends(account);
    }

    function updateClaimWait(uint256 newClaimWait) external onlyOwner {
        require(
            newClaimWait >= 3600 && newClaimWait <= 86400,
            "DT: 1 < claimWait < 24"
        );
        require(
            newClaimWait != claimWait,
            "DT: Same"
        );
        emit ClaimWaitUpdated(newClaimWait, claimWait);
        claimWait = newClaimWait;
    }

    function getLastProcessedIndex() external view returns (uint256) {
        return lastProcessedIndex;
    }

    function getNumberOfTokenHolders() external view returns (uint256) {
        return tokenHoldersMap.keys.length;
    }

    function isExcludedFromDividends(address account)
        public
        view
        returns (bool)
    {
        return excludedFromDividends[account];
    }

    function getAccount(address _account)
        public
        view
        returns (
            address account,
            int256 index,
            int256 iterationsUntilProcessed,
            uint256 withdrawableDividends,
            uint256 totalDividends,
            uint256 lastClaimTime,
            uint256 nextClaimTime,
            uint256 secondsUntilAutoClaimAvailable
        )
    {
        account = _account;

        index = MAPGetIndexOfKey(account);

        iterationsUntilProcessed = -1;

        if (index >= 0) {
            if (uint256(index) > lastProcessedIndex) {
                iterationsUntilProcessed = index.sub(
                    int256(lastProcessedIndex)
                );
            } else {
                uint256 processesUntilEndOfArray = tokenHoldersMap.keys.length >
                    lastProcessedIndex
                    ? tokenHoldersMap.keys.length.sub(lastProcessedIndex)
                    : 0;

                iterationsUntilProcessed = index.add(
                    int256(processesUntilEndOfArray)
                );
            }
        }

        withdrawableDividends = withdrawableDividendOf(account);
        totalDividends = accumulativeDividendOf(account);

        lastClaimTime = lastClaimTimes[account];

        nextClaimTime = lastClaimTime > 0 ? lastClaimTime.add(claimWait) : 0;

        secondsUntilAutoClaimAvailable = nextClaimTime > block.timestamp
            ? nextClaimTime.sub(block.timestamp)
            : 0;
    }

    function getAccountAtIndex(uint256 index)
        public
        view
        returns (
            address,
            int256,
            int256,
            uint256,
            uint256,
            uint256,
            uint256,
            uint256
        )
    {
        if (index >= MAPSize()) {
            return (
                0x0000000000000000000000000000000000000000,
                -1,
                -1,
                0,
                0,
                0,
                0,
                0
            );
        }

        address account = MAPGetKeyAtIndex(index);

        return getAccount(account);
    }

    function canAutoClaim(uint256 lastClaimTime) private view returns (bool) {
        if (lastClaimTime > block.timestamp) {
            return false;
        }

        return block.timestamp.sub(lastClaimTime) >= claimWait;
    }

    function setBalance(address payable account, uint256 newBalance)
        external
        onlyOwner
    {
        if (excludedFromDividends[account]) {
            return;
        }

        if (newBalance >= minimumTokenBalanceForDividends) {
            _setBalance(account, newBalance);
            MAPSet(account, newBalance);
        } else {
            _setBalance(account, 0);
            MAPRemove(account);
        }

        processAccount(account, true);
    }

    function process(uint256 gas)
        public
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 numberOfTokenHolders = tokenHoldersMap.keys.length;

        if (numberOfTokenHolders == 0) {
            return (0, 0, lastProcessedIndex);
        }

        uint256 _lastProcessedIndex = lastProcessedIndex;

        uint256 gasUsed = 0;

        uint256 gasLeft = gasleft();

        uint256 iterations = 0;
        uint256 claims = 0;

        while (gasUsed < gas && iterations < numberOfTokenHolders) {
            _lastProcessedIndex++;

            if (_lastProcessedIndex >= tokenHoldersMap.keys.length) {
                _lastProcessedIndex = 0;
            }

            address account = tokenHoldersMap.keys[_lastProcessedIndex];

            if (canAutoClaim(lastClaimTimes[account])) {
                if (processAccount(payable(account), true)) {
                    claims++;
                }
            }

            iterations++;

            uint256 newGasLeft = gasleft();

            if (gasLeft > newGasLeft) {
                gasUsed = gasUsed.add(gasLeft.sub(newGasLeft));
            }

            gasLeft = newGasLeft;
        }

        lastProcessedIndex = _lastProcessedIndex;

        return (iterations, claims, lastProcessedIndex);
    }

    function processAccount(address payable account, bool automatic)
        public
        onlyOwner
        returns (bool)
    {
        uint256 amount = _withdrawDividendOfUser(account);

        if (amount > 0) {
            lastClaimTimes[account] = block.timestamp;
            emit Claim(account, amount, automatic);
            return true;
        }

        return false;
    }

    function MAPGet(address key) public view returns (uint) {
        return tokenHoldersMap.values[key];
    }

    function MAPGetIndexOfKey(address key) public view returns (int) {
        if (!tokenHoldersMap.inserted[key]) {
            return -1;
        }
        return int(tokenHoldersMap.indexOf[key]);
    }

    function MAPGetKeyAtIndex(uint index) public view returns (address) {
        return tokenHoldersMap.keys[index];
    }

    function MAPSize() public view returns (uint) {
        return tokenHoldersMap.keys.length;
    }

    function MAPSet(address key, uint val) internal {
        if (tokenHoldersMap.inserted[key]) {
            tokenHoldersMap.values[key] = val;
        } else {
            tokenHoldersMap.inserted[key] = true;
            tokenHoldersMap.values[key] = val;
            tokenHoldersMap.indexOf[key] = tokenHoldersMap.keys.length;
            tokenHoldersMap.keys.push(key);
        }
    }

    function MAPRemove(address key) internal {
        if (!tokenHoldersMap.inserted[key]) {
            return;
        }

        delete tokenHoldersMap.inserted[key];
        delete tokenHoldersMap.values[key];

        uint index = tokenHoldersMap.indexOf[key];
        uint lastIndex = tokenHoldersMap.keys.length - 1;
        address lastKey = tokenHoldersMap.keys[lastIndex];

        tokenHoldersMap.indexOf[lastKey] = index;
        delete tokenHoldersMap.indexOf[key];

        tokenHoldersMap.keys[index] = lastKey;
        tokenHoldersMap.keys.pop();
    }

    function distributeDividends() external payable override {}
}

/**
 * Hex token interface
 * Isn't Hex itself, only allows us to interface.
 * SPDX-License-Identifier: BSD-3-Clause
 */
pragma solidity ^0.8.15;
interface IHex {
    event StakeStart(
        uint256 data0,
        address indexed stakerAddr,
        uint40 indexed stakeId
    );
    event StakeGoodAccounting(
        uint256 data0,
        uint256 data1,
        address indexed stakerAddr,
        uint40 indexed stakeId,
        address indexed senderAddr
    );
    event StakeEnd(
        uint256 data0,
        uint256 data1,
        address indexed stakerAddr,
        uint40 indexed stakeId
    );

    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    function stakeLists(address, uint256) view external returns(uint40 stakeId, uint72 stakedHearts, uint72 stakeShares, uint16 lockedDay, uint16 stakedDays, uint16 unlockedDay, bool isAutoStake);
    /**
     * @dev PUBLIC FACING: Optionally update daily data for a smaller
     * range to reduce gas cost for a subsequent operation
     * @param beforeDay Only update days before this day number (optional; 0 for current day)
     */
    function dailyDataUpdate(uint256 beforeDay) external;
    /**
     * @dev PUBLIC FACING: External helper to return multiple values of daily data with
     * a single call. Ugly implementation due to limitations of the standard ABI encoder.
     * @param beginDay First day of data range
     * @param endDay Last day (non-inclusive) of data range
     * @return list Fixed array of packed values
     */
    
    function dailyDataRange(uint256 beginDay, uint256 endDay) external view returns (uint256[] memory list);
    /**
     * @dev PUBLIC FACING: External helper to return most global info with a single call.
     * Ugly implementation due to limitations of the standard ABI encoder.
     * @return Fixed array of values
     */
    function globalInfo() external view returns (uint256[13] memory);

    /**
     * @dev PUBLIC FACING: External helper for the current day number since launch time
     * @return Current day number (zero-based)
     */
    function currentDay() external view returns (uint256);
    
    /**
     * @dev PUBLIC FACING: Open a stake.
     * @param newStakedHearts Number of Hearts to stake
     * @param newStakedDays Number of days to stake
     */
    
    function stakeStart(uint256 newStakedHearts, uint256 newStakedDays) external;

    /**
     * @dev PUBLIC FACING: Unlocks a completed stake, distributing the proceeds of any penalty
     * immediately. The staker must still call stakeEnd() to retrieve their stake return (if any).
     * @param stakerAddr Address of staker
     * @param stakeIndex Index of stake within stake list
     * @param stakeIdParam The stake's id
     */
    function stakeGoodAccounting(address stakerAddr, uint256 stakeIndex, uint40 stakeIdParam) external;

    /**
     * @dev PUBLIC FACING: Closes a stake. The order of the stake list can change so
     * a stake id is used to reject stale indexes.
     * @param stakeIndex Index of stake within stake list
     * @param stakeIdParam The stake's id
     */
    function stakeEnd(uint256 stakeIndex, uint40 stakeIdParam) external;

    /**
     * @dev PUBLIC FACING: Return the current stake count for a staker address
     * @param stakerAddr Address of staker
     */
    function stakeCount(address stakerAddr) external view returns (uint256);
}

/**
 * A Multisend interface
 * SPDX-License-Identifier: MIT
 */
pragma solidity ^0.8.15;
interface IMultisend {

    /// @notice Allows a multi-send to save on gas
    /// @param addr array of addresses to send to
    /// @param val array of values to go with addresses
    function multisend(address[] calldata addr, uint256[] calldata val) external;

    /// @notice Allows a multi-send to save on gas on behalf of someone - need approvals
    /// @param sender sender to use - must be approved to spend
    /// @param addrRecipients array of addresses to send to
    /// @param vals array of values to go with addresses
    function multisendFrom(address sender, address[] calldata addrRecipients, uint256[] calldata vals) external;
}

/**
 * SimpleStakingImpl
 * Handles staking, unstaking, collecting rewards and re-staking Hex
 * Holds the Hex pending staking in itself
 */
pragma solidity ^0.8.15;
import "@openzeppelin/contracts/access/Ownable.sol";
import "./IHex.sol";
//import "./IHedron.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";
import "./DPT/TokenDividendTracker.sol";
contract SimpleStakingImpl is Ownable {
    // Block of 256 bits
    address public token;
    uint32 public stakingDays;
    uint64 public lastStakedStart;
    // Closed
    // Block of 256 bits
    address public dividendTracker;
    // Closed
    address public hedron;
    address public router;

    uint64 public launchTime;

    constructor(
        address stakingToken,
        uint32 daysToStake,
        address dividendTrackerToken,
        address hdrn,
        address rtr
    ) {
        token = stakingToken;
        stakingDays = daysToStake;
        lastStakedStart = uint64(IHex(token).currentDay());

        dividendTracker = dividendTrackerToken;
        hedron = hdrn;
        router = rtr;
        launchTime = uint64(block.timestamp) + 86400;
        
    }

    function updateFork(address newRtr) external onlyOwner {
        // Update router
        router = newRtr;

    }

    function afterReceivedHex() external onlyOwner {
        // Called after Hex has been received
        
        // We only ever have one stake in the list, but we get stakeCount anyway
        IHex stakingContract = IHex(token);
        // We check if there's a stake to resolve
        uint256 stakeNumber = stakingContract.stakeCount(address(this));
        if (stakeNumber > 0) {
            // Something was staked last time so it's time to unstake it
            // Unstake all of the stakes present, if there's more than one (there shouldn't be, but we have to assume)
            uint256 currentDay = stakingContract.currentDay();
            // Total stake output to accumulate
            uint256 stakeRewards = 0;
            for (uint i = 0; i < stakeNumber; i++) {
                // Get the pre-unlock balance of tokens
                uint256 oldBal = stakingContract.balanceOf(address(this));
                // Grab the stakeId from the stakeLists
                (uint40 stakeId, , , uint16 lockedDay, uint16 stakedDays, , ) = stakingContract.stakeLists(
                    address(this),
                    i
                );
                // If this is true, the stake is ready for unlock
                if(currentDay >= lockedDay + stakedDays) {
                    // Run the "good" stake unlocker to not be penalised
                    stakingContract.stakeGoodAccounting(address(this), i, stakeId);
                    // Get the tokens back
                    stakingContract.stakeEnd(i, stakeId);
                    // Accumulate the stake rewards
                    stakeRewards = stakeRewards + (stakingContract.balanceOf(address(this)) - oldBal);
                }
                
                
            }
            if(stakeRewards > 0) {
                // Pay out 1% of the stake output to the dividend tracker
                stakingContract.transfer(dividendTracker, stakeRewards / 100);
                // Tell it there's some tokens to calculate
                TokenDividendTracker(dividendTracker).afterReceivedHex(stakeRewards / 100);
                // Now need to restake our holdings
                uint256 stakeAmt = stakingContract.balanceOf(address(this));
                stakingContract.stakeStart(stakeAmt, stakingDays);
            }
            
        } else {
            // Give a day to fill pool
            if(block.timestamp > launchTime) {
                uint256 stakeAmt = stakingContract.balanceOf(address(this));
                stakingContract.stakeStart(stakeAmt, stakingDays);
            }
            
        }
        
    }

}

{
  "optimizer": {
    "enabled": true,
    "runs": 50
  },
  "viaIR": false,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"nativeWrapped","type":"address"}],"name":"openTrading","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"gas","type":"uint256"}],"name":"processDividendTracker","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"enabled","type":"bool"}],"name":"setArbEnabled","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"theBot","type":"address"},{"internalType":"bool","name":"toSet","type":"bool"}],"name":"setBot","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"amount","type":"uint32"}],"name":"setBuyInfl","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"bool","name":"isExcluded","type":"bool"}],"name":"setExcludedFromFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"amount","type":"uint32"}],"name":"setRewardRatio","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"amount","type":"uint32"}],"name":"setSellDefl","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"amount","type":"uint32"}],"name":"setStakingRatio","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stakingImpl","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"claimWait","type":"uint256"}],"name":"updateClaimWait","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint32","name":"newValue","type":"uint32"}],"name":"updateGasForProcessing","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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0000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d

-----Decoded View---------------
Arg [0] : router (address): 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D

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