MATIC Price: $0.70 (-0.18%)
Gas: 125 GWei
 

Overview

MATIC Balance

Polygon PoS Chain LogoPolygon PoS Chain LogoPolygon PoS Chain Logo0.100000120200522536 MATIC

MATIC Value

$0.07 (@ $0.70/MATIC)

Token Holdings

Multichain Info

Transaction Hash
Method
Block
From
To
Value
External Swap544969612024-03-10 16:21:0936 days ago1710087669IN
WooFi: Swap Router
0 MATIC0.04229216255.64375226
External Swap544964142024-03-10 16:01:4536 days ago1710086505IN
WooFi: Swap Router
0 MATIC0.04113074233.72399657
External Swap544962612024-03-10 15:56:2136 days ago1710086181IN
WooFi: Swap Router
0 MATIC0.02133359121.20120867
External Swap544952612024-03-10 15:20:3236 days ago1710084032IN
WooFi: Swap Router
0 MATIC0.03931873223.4158459
External Swap544945642024-03-10 14:55:5236 days ago1710082552IN
WooFi: Swap Router
0 MATIC0.03990937226.79647957
External Swap544942952024-03-10 14:46:2036 days ago1710081980IN
WooFi: Swap Router
0 MATIC0.06506174369.65222995
External Swap544941252024-03-10 14:39:5836 days ago1710081598IN
WooFi: Swap Router
0 MATIC0.03918831237.32514136
External Swap544940052024-03-10 14:35:4436 days ago1710081344IN
WooFi: Swap Router
0 MATIC0.03953419239.43286971
External Swap544938952024-03-10 14:31:5036 days ago1710081110IN
WooFi: Swap Router
0 MATIC0.21867182130.28230885
External Swap544938662024-03-10 14:30:4836 days ago1710081048IN
WooFi: Swap Router
0 MATIC0.21647854152.40954139
External Swap544937952024-03-10 14:28:1836 days ago1710080898IN
WooFi: Swap Router
0 MATIC0.16841077118.08439062
External Swap544932972024-03-10 14:10:4036 days ago1710079840IN
WooFi: Swap Router
0 MATIC0.05691848286.01678601
External Swap544925692024-03-10 13:44:0936 days ago1710078249IN
WooFi: Swap Router
0 MATIC0.0603908303.89288405
External Swap544896562024-03-10 11:59:5836 days ago1710071998IN
WooFi: Swap Router
0 MATIC0.04201033241.33193102
External Swap544829122024-03-10 7:49:0536 days ago1710056945IN
WooFi: Swap Router
0 MATIC0.0417609239.4012078
External Swap544824512024-03-10 7:32:1336 days ago1710055933IN
WooFi: Swap Router
0 MATIC0.04215376241.72677454
External Swap544820502024-03-10 7:17:3836 days ago1710055058IN
WooFi: Swap Router
0 MATIC0.03853013218.94607426
External Swap544814872024-03-10 6:57:0636 days ago1710053826IN
WooFi: Swap Router
0 MATIC0.03838658220.14819448
External Swap544814482024-03-10 6:55:4436 days ago1710053744IN
WooFi: Swap Router
0 MATIC0.03922318224.93451837
External Swap544810162024-03-10 6:40:1236 days ago1710052812IN
WooFi: Swap Router
0 MATIC0.04094605234.77568303
External Swap544810042024-03-10 6:39:4636 days ago1710052786IN
WooFi: Swap Router
0 MATIC0.04171415239.21960869
External Swap544574612024-03-09 16:04:0937 days ago1710000249IN
WooFi: Swap Router
0 MATIC0.039292237.52303149
Swap542991242024-03-05 15:33:1641 days ago1709652796IN
WooFi: Swap Router
0 MATIC0.30639591,733.64588183
Swap542991242024-03-05 15:33:1641 days ago1709652796IN
WooFi: Swap Router
0 MATIC0.307565541,740.26391711
Swap542952332024-03-05 13:03:4441 days ago1709643824IN
WooFi: Swap Router
0 MATIC0.0293982134.65773007
View all transactions

Latest 25 internal transactions (View All)

Parent Txn Hash Block From To Value
544969612024-03-10 16:21:0936 days ago1710087669
WooFi: Swap Router
3.91791489 MATIC
544969612024-03-10 16:21:0936 days ago1710087669
WooFi: Swap Router
3.91791489 MATIC
544964142024-03-10 16:01:4536 days ago1710086505
WooFi: Swap Router
9.27510027 MATIC
544964142024-03-10 16:01:4536 days ago1710086505
WooFi: Swap Router
9.27510027 MATIC
544962612024-03-10 15:56:2136 days ago1710086181
WooFi: Swap Router
19.0906153 MATIC
544962612024-03-10 15:56:2136 days ago1710086181
WooFi: Swap Router
19.0906153 MATIC
544952612024-03-10 15:20:3236 days ago1710084032
WooFi: Swap Router
14.56958373 MATIC
544952612024-03-10 15:20:3236 days ago1710084032
WooFi: Swap Router
14.56958373 MATIC
544945642024-03-10 14:55:5236 days ago1710082552
WooFi: Swap Router
10.32311945 MATIC
544945642024-03-10 14:55:5236 days ago1710082552
WooFi: Swap Router
10.32311945 MATIC
544942952024-03-10 14:46:2036 days ago1710081980
WooFi: Swap Router
20.21356199 MATIC
544942952024-03-10 14:46:2036 days ago1710081980
WooFi: Swap Router
20.21356199 MATIC
544941252024-03-10 14:39:5836 days ago1710081598
WooFi: Swap Router
4.80683461 MATIC
544941252024-03-10 14:39:5836 days ago1710081598
WooFi: Swap Router
4.80683461 MATIC
544940052024-03-10 14:35:4436 days ago1710081344
WooFi: Swap Router
8.31167394 MATIC
544940052024-03-10 14:35:4436 days ago1710081344
WooFi: Swap Router
8.31167394 MATIC
544896562024-03-10 11:59:5836 days ago1710071998
WooFi: Swap Router
3.16878176 MATIC
544896562024-03-10 11:59:5836 days ago1710071998
WooFi: Swap Router
3.16878176 MATIC
544829122024-03-10 7:49:0536 days ago1710056945
WooFi: Swap Router
6.51754185 MATIC
544829122024-03-10 7:49:0536 days ago1710056945
WooFi: Swap Router
6.51754185 MATIC
544824512024-03-10 7:32:1336 days ago1710055933
WooFi: Swap Router
9.67812331 MATIC
544824512024-03-10 7:32:1336 days ago1710055933
WooFi: Swap Router
9.67812331 MATIC
544820502024-03-10 7:17:3836 days ago1710055058
WooFi: Swap Router
10.84492697 MATIC
544820502024-03-10 7:17:3836 days ago1710055058
WooFi: Swap Router
10.84492697 MATIC
544814872024-03-10 6:57:0636 days ago1710053826
WooFi: Swap Router
2.03816754 MATIC
View All Internal Transactions
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Contract Source Code Verified (Exact Match)

Contract Name:
WooRouterV2

Compiler Version
v0.8.14+commit.80d49f37

Optimization Enabled:
Yes with 20000 runs

Other Settings:
default evmVersion
File 1 of 12 : WooRouterV2.sol
// SPDX-License-Identifier: MIT
pragma solidity =0.8.14;

/*

░██╗░░░░░░░██╗░█████╗░░█████╗░░░░░░░███████╗██╗
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*
* MIT License
* ===========
*
* Copyright (c) 2020 WooTrade
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

import "./interfaces/IWooPPV2.sol";
import "./interfaces/IWETH.sol";
import "./interfaces/IWooRouterV2.sol";

import "./libraries/TransferHelper.sol";

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

/// @title Woo Router V2 implementation.
/// @notice Router for stateless execution of swaps against Woo private pool.
contract WooRouterV2 is IWooRouterV2, Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;

    /* ----- Constant variables ----- */

    // Erc20 placeholder address for native tokens (e.g. eth, bnb, matic, etc)
    address constant ETH_PLACEHOLDER_ADDR = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

    /* ----- State variables ----- */

    // Wrapper for native tokens (e.g. eth, bnb, matic, etc)
    // BSC WBNB: 0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c
    address public immutable override WETH;

    IWooPPV2 public override wooPool;

    mapping(address => bool) public isWhitelisted;

    address public quoteToken;

    /* ----- Callback Function ----- */

    receive() external payable {
        // only accept ETH from WETH or whitelisted external swaps.
        assert(msg.sender == WETH || isWhitelisted[msg.sender]);
    }

    /* ----- Query & swap APIs ----- */

    constructor(address _weth, address _pool) {
        require(_weth != address(0), "WooRouter: weth_ZERO_ADDR");
        WETH = _weth;
        setPool(_pool);
    }

    /// @inheritdoc IWooRouterV2
    function querySwap(
        address fromToken,
        address toToken,
        uint256 fromAmount
    ) external view override returns (uint256 toAmount) {
        require(fromToken != address(0), "WooRouter: !fromToken");
        require(toToken != address(0), "WooRouter: !toToken");
        fromToken = (fromToken == ETH_PLACEHOLDER_ADDR) ? WETH : fromToken;
        toToken = (toToken == ETH_PLACEHOLDER_ADDR) ? WETH : toToken;
        toAmount = wooPool.query(fromToken, toToken, fromAmount);
    }

    function tryQuerySwap(
        address fromToken,
        address toToken,
        uint256 fromAmount
    ) external view override returns (uint256 toAmount) {
        if (fromToken == address(0) || toToken == address(0)) {
            return 0;
        }
        fromToken = (fromToken == ETH_PLACEHOLDER_ADDR) ? WETH : fromToken;
        toToken = (toToken == ETH_PLACEHOLDER_ADDR) ? WETH : toToken;
        toAmount = wooPool.tryQuery(fromToken, toToken, fromAmount);
    }

    /// @inheritdoc IWooRouterV2
    function swap(
        address fromToken,
        address toToken,
        uint256 fromAmount,
        uint256 minToAmount,
        address payable to,
        address rebateTo
    ) external payable override nonReentrant returns (uint256 realToAmount) {
        require(fromToken != address(0), "WooRouter: !fromToken");
        require(toToken != address(0), "WooRouter: !toToken");
        require(to != address(0), "WooRouter: !to");

        bool isFromETH = fromToken == ETH_PLACEHOLDER_ADDR;
        bool isToETH = toToken == ETH_PLACEHOLDER_ADDR;
        fromToken = isFromETH ? WETH : fromToken;
        toToken = isToETH ? WETH : toToken;

        // Step 1: transfer the source tokens to WooRouter
        if (isFromETH) {
            require(fromAmount <= msg.value, "WooRouter: fromAmount_INVALID");
            IWETH(WETH).deposit{value: msg.value}();
            TransferHelper.safeTransfer(WETH, address(wooPool), fromAmount);
        } else {
            TransferHelper.safeTransferFrom(fromToken, msg.sender, address(wooPool), fromAmount);
        }

        // Step 2: swap and transfer
        if (isToETH) {
            realToAmount = wooPool.swap(fromToken, toToken, fromAmount, minToAmount, address(this), rebateTo);
            IWETH(WETH).withdraw(realToAmount);
            TransferHelper.safeTransferETH(to, realToAmount);
        } else {
            realToAmount = wooPool.swap(fromToken, toToken, fromAmount, minToAmount, to, rebateTo);
        }

        // Step 3: firing event
        emit WooRouterSwap(
            SwapType.WooSwap,
            isFromETH ? ETH_PLACEHOLDER_ADDR : fromToken,
            isToETH ? ETH_PLACEHOLDER_ADDR : toToken,
            fromAmount,
            realToAmount,
            msg.sender,
            to,
            rebateTo
        );
    }

    /// @inheritdoc IWooRouterV2
    function externalSwap(
        address approveTarget,
        address swapTarget,
        address fromToken,
        address toToken,
        uint256 fromAmount,
        uint256 minToAmount,
        address payable to,
        bytes calldata data
    ) external payable override nonReentrant returns (uint256 realToAmount) {
        require(approveTarget != address(0), "WooRouter: approveTarget_ADDR_ZERO");
        require(swapTarget != address(0), "WooRouter: swapTarget_ADDR_ZERO");
        require(fromToken != address(0), "WooRouter: fromToken_ADDR_ZERO");
        require(toToken != address(0), "WooRouter: toToken_ADDR_ZERO");
        require(to != address(0), "WooRouter: to_ADDR_ZERO");
        require(isWhitelisted[approveTarget], "WooRouter: APPROVE_TARGET_NOT_ALLOWED");
        require(isWhitelisted[swapTarget], "WooRouter: SWAP_TARGET_NOT_ALLOWED");

        uint256 preBalance = _generalBalanceOf(toToken, address(this));
        _internalFallbackSwap(approveTarget, swapTarget, fromToken, fromAmount, data);
        uint256 postBalance = _generalBalanceOf(toToken, address(this));

        require(preBalance <= postBalance, "WooRouter: balance_ERROR");
        realToAmount = postBalance - preBalance;
        require(realToAmount >= minToAmount && realToAmount > 0, "WooRouter: realToAmount_NOT_ENOUGH");
        _generalTransfer(toToken, to, realToAmount);

        emit WooRouterSwap(SwapType.DodoSwap, fromToken, toToken, fromAmount, realToAmount, msg.sender, to, address(0));
    }

    /* ----- Admin functions ----- */

    /// @dev Rescue the specified funds when stuck happen
    /// @param stuckToken the stuck token address
    function inCaseTokenGotStuck(address stuckToken) external onlyOwner {
        if (stuckToken == ETH_PLACEHOLDER_ADDR) {
            TransferHelper.safeTransferETH(msg.sender, address(this).balance);
        } else {
            uint256 amount = IERC20(stuckToken).balanceOf(address(this));
            TransferHelper.safeTransfer(stuckToken, msg.sender, amount);
        }
    }

    /// @dev Set wooPool from newPool
    /// @param newPool Wooracle address
    function setPool(address newPool) public onlyOwner {
        wooPool = IWooPPV2(newPool);
        quoteToken = wooPool.quoteToken();
        require(quoteToken != address(0), "WooRouter: quoteToken_ADDR_ZERO");
        emit WooPoolChanged(newPool);
    }

    /// @dev Add target address into whitelist
    /// @param target address that approved by WooRouter
    /// @param whitelisted approve to using WooRouter or not
    function setWhitelisted(address target, bool whitelisted) external onlyOwner {
        require(target != address(0), "WooRouter: target_ADDR_ZERO");
        isWhitelisted[target] = whitelisted;
    }

    /* ----- Private Function ----- */

    function _internalFallbackSwap(
        address approveTarget,
        address swapTarget,
        address fromToken,
        uint256 fromAmount,
        bytes calldata data
    ) private {
        require(isWhitelisted[approveTarget], "WooRouter: APPROVE_TARGET_NOT_ALLOWED");
        require(isWhitelisted[swapTarget], "WooRouter: SWAP_TARGET_NOT_ALLOWED");

        if (fromToken != ETH_PLACEHOLDER_ADDR) {
            TransferHelper.safeTransferFrom(fromToken, msg.sender, address(this), fromAmount);
            TransferHelper.safeApprove(fromToken, approveTarget, fromAmount);
        } else {
            require(fromAmount <= msg.value, "WooRouter: fromAmount_INVALID");
        }

        (bool success, ) = swapTarget.call{value: fromToken == ETH_PLACEHOLDER_ADDR ? fromAmount : 0}(data);
        require(success, "WooRouter: FALLBACK_SWAP_FAILED");
    }

    function _generalTransfer(
        address token,
        address payable to,
        uint256 amount
    ) private {
        if (amount > 0) {
            if (token == ETH_PLACEHOLDER_ADDR) {
                TransferHelper.safeTransferETH(to, amount);
            } else {
                TransferHelper.safeTransfer(token, to, amount);
            }
        }
    }

    function _generalBalanceOf(address token, address who) private view returns (uint256) {
        return token == ETH_PLACEHOLDER_ADDR ? who.balance : IERC20(token).balanceOf(who);
    }
}

File 2 of 12 : IWooRouterV2.sol
// SPDX-License-Identifier: MIT
pragma solidity =0.8.14;

/*

░██╗░░░░░░░██╗░█████╗░░█████╗░░░░░░░███████╗██╗
░██║░░██╗░░██║██╔══██╗██╔══██╗░░░░░░██╔════╝██║
░╚██╗████╗██╔╝██║░░██║██║░░██║█████╗█████╗░░██║
░░████╔═████║░██║░░██║██║░░██║╚════╝██╔══╝░░██║
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*
* MIT License
* ===========
*
* Copyright (c) 2020 WooTrade
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

import "../interfaces/IWooPPV2.sol";

/// @title Woo router interface (version 2)
/// @notice functions to interface with WooFi swap
interface IWooRouterV2 {
    /* ----- Type declarations ----- */

    enum SwapType {
        WooSwap,
        DodoSwap
    }

    /* ----- Events ----- */

    event WooRouterSwap(
        SwapType swapType,
        address indexed fromToken,
        address indexed toToken,
        uint256 fromAmount,
        uint256 toAmount,
        address from,
        address indexed to,
        address rebateTo
    );

    event WooPoolChanged(address newPool);

    /* ----- Router properties ----- */

    function WETH() external view returns (address);

    function wooPool() external view returns (IWooPPV2);

    /* ----- Main query & swap APIs ----- */

    /// @notice query the amount to swap fromToken -> toToken
    /// @param fromToken the from token
    /// @param toToken the to token
    /// @param fromAmount the amount of fromToken to swap
    /// @return toAmount the predicted amount to receive
    function querySwap(
        address fromToken,
        address toToken,
        uint256 fromAmount
    ) external view returns (uint256 toAmount);

    /// @notice query the amount to swap fromToken -> toToken,
    ///     WITHOUT checking the reserve balance; so it
    ///     always returns the quoted amount (for reference).
    /// @param fromToken the from token
    /// @param toToken the to token
    /// @param fromAmount the amount of fromToken to swap
    /// @return toAmount the predicted amount to receive
    function tryQuerySwap(
        address fromToken,
        address toToken,
        uint256 fromAmount
    ) external view returns (uint256 toAmount);

    /// @notice Swap `fromToken` to `toToken`.
    /// @param fromToken the from token
    /// @param toToken the to token
    /// @param fromAmount the amount of `fromToken` to swap
    /// @param minToAmount the minimum amount of `toToken` to receive
    /// @param to the destination address
    /// @param rebateTo the rebate address (optional, can be 0)
    /// @return realToAmount the amount of toToken to receive
    function swap(
        address fromToken,
        address toToken,
        uint256 fromAmount,
        uint256 minToAmount,
        address payable to,
        address rebateTo
    ) external payable returns (uint256 realToAmount);

    /* ----- 3rd party DEX swap ----- */

    /// @notice swap fromToken -> toToken via an external 3rd swap
    /// @param approveTarget the contract address for token transfer approval
    /// @param swapTarget the contract address for swap
    /// @param fromToken the from token
    /// @param toToken the to token
    /// @param fromAmount the amount of fromToken to swap
    /// @param minToAmount the min amount of swapped toToken
    /// @param to the destination address
    /// @param data call data for external call
    function externalSwap(
        address approveTarget,
        address swapTarget,
        address fromToken,
        address toToken,
        uint256 fromAmount,
        uint256 minToAmount,
        address payable to,
        bytes calldata data
    ) external payable returns (uint256 realToAmount);
}

File 2 of 12 : IWooPPV2.sol
// SPDX-License-Identifier: MIT
pragma solidity =0.8.14;

/*

░██╗░░░░░░░██╗░█████╗░░█████╗░░░░░░░███████╗██╗
░██║░░██╗░░██║██╔══██╗██╔══██╗░░░░░░██╔════╝██║
░╚██╗████╗██╔╝██║░░██║██║░░██║█████╗█████╗░░██║
░░████╔═████║░██║░░██║██║░░██║╚════╝██╔══╝░░██║
░░╚██╔╝░╚██╔╝░╚█████╔╝╚█████╔╝░░░░░░██║░░░░░██║
░░░╚═╝░░░╚═╝░░░╚════╝░░╚════╝░░░░░░░╚═╝░░░░░╚═╝

*
* MIT License
* ===========
*
* Copyright (c) 2020 WooTrade
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

/// @title Woo private pool for swap.
/// @notice Use this contract to directly interfact with woo's synthetic proactive
///         marketing making pool.
/// @author woo.network
interface IWooPPV2 {
    /* ----- Events ----- */

    event Deposit(address indexed token, address indexed sender, uint256 amount);
    event Withdraw(address indexed token, address indexed receiver, uint256 amount);
    event Migrate(address indexed token, address indexed receiver, uint256 amount);
    event AdminUpdated(address indexed addr, bool flag);
    event FeeAddrUpdated(address indexed newFeeAddr);
    event WooracleUpdated(address indexed newWooracle);
    event WooSwap(
        address indexed fromToken,
        address indexed toToken,
        uint256 fromAmount,
        uint256 toAmount,
        address from,
        address indexed to,
        address rebateTo,
        uint256 swapVol,
        uint256 swapFee
    );

    /* ----- External Functions ----- */

    /// @notice The quote token address (immutable).
    /// @return address of quote token
    function quoteToken() external view returns (address);

    /// @notice Gets the pool size of the specified token (swap liquidity).
    /// @param token the token address
    /// @return the pool size
    function poolSize(address token) external view returns (uint256);

    /// @notice Query the amount to swap `fromToken` to `toToken`, without checking the pool reserve balance.
    /// @param fromToken the from token
    /// @param toToken the to token
    /// @param fromAmount the amount of `fromToken` to swap
    /// @return toAmount the swapped amount of `toToken`
    function tryQuery(
        address fromToken,
        address toToken,
        uint256 fromAmount
    ) external view returns (uint256 toAmount);

    /// @notice Query the amount to swap `fromToken` to `toToken`, with checking the pool reserve balance.
    /// @dev tx reverts when 'toToken' balance is insufficient.
    /// @param fromToken the from token
    /// @param toToken the to token
    /// @param fromAmount the amount of `fromToken` to swap
    /// @return toAmount the swapped amount of `toToken`
    function query(
        address fromToken,
        address toToken,
        uint256 fromAmount
    ) external view returns (uint256 toAmount);

    /// @notice Swap `fromToken` to `toToken`.
    /// @param fromToken the from token
    /// @param toToken the to token
    /// @param fromAmount the amount of `fromToken` to swap
    /// @param minToAmount the minimum amount of `toToken` to receive
    /// @param to the destination address
    /// @param rebateTo the rebate address (optional, can be address ZERO)
    /// @return realToAmount the amount of toToken to receive
    function swap(
        address fromToken,
        address toToken,
        uint256 fromAmount,
        uint256 minToAmount,
        address to,
        address rebateTo
    ) external returns (uint256 realToAmount);

    /// @notice Deposit the specified token into the liquidity pool of WooPPV2.
    /// @param token the token to deposit
    /// @param amount the deposit amount
    function deposit(address token, uint256 amount) external;
}

File 2 of 12 : IWETH.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

/// @title Wrapped ETH.
interface IWETH {
    /// @dev Deposit ETH into WETH
    function deposit() external payable;

    /// @dev Transfer WETH to receiver
    /// @param to address of WETH receiver
    /// @param value amount of WETH to transfer
    /// @return get true when succeed, else false
    function transfer(address to, uint256 value) external returns (bool);

    /// @dev Withdraw WETH to ETH
    function withdraw(uint256) external;
}

File 2 of 12 : TransferHelper.sol
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.0;

// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
library TransferHelper {
    function safeApprove(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('approve(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x095ea7b3, to, value));
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            'TransferHelper::safeApprove: approve failed'
        );
    }

    function safeTransfer(
        address token,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transfer(address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb, to, value));
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            'TransferHelper::safeTransfer: transfer failed'
        );
    }

    function safeTransferFrom(
        address token,
        address from,
        address to,
        uint256 value
    ) internal {
        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd, from, to, value));
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            'TransferHelper::transferFrom: transferFrom failed'
        );
    }

    function safeTransferETH(address to, uint256 value) internal {
        (bool success, ) = to.call{value: value}(new bytes(0));
        require(success, 'TransferHelper::safeTransferETH: ETH transfer failed');
    }
}

File 2 of 12 : Ownable.sol
// 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);
    }
}

File 2 of 12 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

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

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

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

        _;

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

File 2 of 12 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

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

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

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

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

File 2 of 12 : Context.sol
// 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;
    }
}

File 2 of 12 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

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

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

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

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

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

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

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

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

File 2 of 12 : draft-IERC20Permit.sol
// 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);
}

File 2 of 12 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (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 functionCall(target, data, "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");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(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) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason 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 {
            // 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);
            }
        }
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 20000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_weth","type":"address"},{"internalType":"address","name":"_pool","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newPool","type":"address"}],"name":"WooPoolChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"enum IWooRouterV2.SwapType","name":"swapType","type":"uint8"},{"indexed":true,"internalType":"address","name":"fromToken","type":"address"},{"indexed":true,"internalType":"address","name":"toToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"fromAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"toAmount","type":"uint256"},{"indexed":false,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"address","name":"rebateTo","type":"address"}],"name":"WooRouterSwap","type":"event"},{"inputs":[],"name":"WETH","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"approveTarget","type":"address"},{"internalType":"address","name":"swapTarget","type":"address"},{"internalType":"address","name":"fromToken","type":"address"},{"internalType":"address","name":"toToken","type":"address"},{"internalType":"uint256","name":"fromAmount","type":"uint256"},{"internalType":"uint256","name":"minToAmount","type":"uint256"},{"internalType":"address payable","name":"to","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"externalSwap","outputs":[{"internalType":"uint256","name":"realToAmount","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"stuckToken","type":"address"}],"name":"inCaseTokenGotStuck","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"isWhitelisted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"fromToken","type":"address"},{"internalType":"address","name":"toToken","type":"address"},{"internalType":"uint256","name":"fromAmount","type":"uint256"}],"name":"querySwap","outputs":[{"internalType":"uint256","name":"toAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"quoteToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newPool","type":"address"}],"name":"setPool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bool","name":"whitelisted","type":"bool"}],"name":"setWhitelisted","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"fromToken","type":"address"},{"internalType":"address","name":"toToken","type":"address"},{"internalType":"uint256","name":"fromAmount","type":"uint256"},{"internalType":"uint256","name":"minToAmount","type":"uint256"},{"internalType":"address payable","name":"to","type":"address"},{"internalType":"address","name":"rebateTo","type":"address"}],"name":"swap","outputs":[{"internalType":"uint256","name":"realToAmount","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"fromToken","type":"address"},{"internalType":"address","name":"toToken","type":"address"},{"internalType":"uint256","name":"fromAmount","type":"uint256"}],"name":"tryQuerySwap","outputs":[{"internalType":"uint256","name":"toAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"wooPool","outputs":[{"internalType":"contract IWooPPV2","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf12700000000000000000000000007081a38158bd050ae4a86e38e0225bc281887d7e

-----Decoded View---------------
Arg [0] : _weth (address): 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270
Arg [1] : _pool (address): 0x7081A38158BD050Ae4a86e38E0225Bc281887d7E

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf1270
Arg [1] : 0000000000000000000000007081a38158bd050ae4a86e38e0225bc281887d7e


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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.