Contract 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469

 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x3d16b48109f8f16d9604c5da1ac3fae4931f682756b556b3ffacfe05747b6026Remove Liquidity170054792021-09-13 15:53:36447 days 22 hrs ago0x310ea991943a9495911e6153bf8e69ad9ea68ec8 IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.110221622434
0x8cb625d671585e7bd6388ab7ee9008aa452a4714336d412bbc99ba41a5878306Swap Exact Token...160899582021-09-01 19:24:29459 days 19 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.037116959461
0x0dc565e7fd56e03bf46dc7a5518b46738397d0cbe7c3bd27bc1a366576632667Swap Exact Token...128548642021-07-24 21:29:03498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00933354
0x2da55589f15fb34a15fe43d8a3a56466fc2aad26c62fc991a8873f0d3d3b683cSwap Exact Token...128548582021-07-24 21:28:54498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00933354
0x633eb74ace5b069d8ac4da4cf2d9e65b5ea56facb8253055af0a4f2359c3cbf8Swap Exact Token...128548392021-07-24 21:28:34498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.01443474
0x72744ad45b7a0c96117192b6e38491da0af75c27ae8ebf51f4ba335ffb80ec19Swap Exact Token...128548272021-07-24 21:28:18498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00933354
0x884f6139b54992a88cbd662ec18e274000509afe6829420f3d437b0ce74bb8efSwap Exact Token...128548132021-07-24 21:28:01498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00933354
0x4b4525ce2e8fa011155103991356ef99aafca43e43b4ee94ed81163ef72ded48Swap Exact Token...128548042021-07-24 21:27:49498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00933354
0x50107474b52c6cfaa1aa88c5b45cb88eff8365c3af281f6d6e7b89d0ae521e2dSwap Exact Token...128547962021-07-24 21:27:40498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00933354
0x4d00250e5bf6ec1aff9d46a398cac146e20aff689c2e1757d528515c892d0383Swap Exact Token...128547772021-07-24 21:27:19498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.01443474
0x70bdaf1717ff47b005d7b48a70e24a12c22110f1814de6b5943657e725305fd0Swap Exact Token...128547582021-07-24 21:26:56498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.01443564
0x2a817ef98469c2a4e82918d1341f80f5dfd613cb7df5308a45750e08b445972dSwap Exact Token...128547382021-07-24 21:26:34498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.01443474
0x88de2c00aec07949b6263cbbdfe0d2a70485adfb8dad035c4a36394cecc9138fSwap Exact Token...128547192021-07-24 21:26:07498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00933354
0xc855cbbf8f0965aeb3282ca48605a43610607e12376117749169e2baf4ab6e3cSwap Exact Token...128547022021-07-24 21:25:43498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00933354
0xc96c9de7aa1a49d40b1a7e9c8963ec261cefbde3e1ae080a016a0d00d373cc3cSwap Exact Token...128546952021-07-24 21:25:34498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00933354
0xe84ff0e226bf4ddee61cc7f902af95d6d47149f2fe104af3db917907ca9ff654Swap Exact Token...128546202021-07-24 21:24:09498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.01443474
0xbfeb6d91f8a41c75a941debe9d21e088b71108a04391bc0f490e093ab126a028Swap Exact Token...128545932021-07-24 21:23:22498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.01443474
0x0b31ac99bd3ce94aaa0e843ae01392dba61c5f0a1cc59fd62d02e4def480244fRemove Liquidity128540302021-07-24 21:11:45498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.03444642
0x05c2205ecd90b881296b0419fd8e266c25610bf8bb8879f3fe875480a7365d7bRemove Liquidity128539842021-07-24 21:10:50498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.03684114
0x30a1f74b3627b7570242b12e2260efa1113c303d6860374b0f809c3dc8e9dc1fRemove Liquidity128533512021-07-24 20:58:35498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.038102803219
0x7daa0a4974eec892d08fdb180171c915d70754215b504255d6cab9eec5479bafRemove Liquidity128532872021-07-24 20:56:59498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.03451212
0x23df0ab606d71a61ca72d3ee030600a248ff227c77573546a8a8cdb5c5a54fe8Remove Liquidity128532112021-07-24 20:55:23498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.03359304
0x655d2467e7b224f5f16547cca5c38b87fb8e71b7d531a489a7580a41aa3d3f8eSwap Exact Token...128531982021-07-24 20:55:11498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00766305
0x8d6cfc62cfce45dbf1940741ff277a6ae3bb20f33325815266a44005d2b7fa03Swap Exact Token...128531812021-07-24 20:54:54498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00766305
0x6071592e57284182601fd6f6bf5083aa7dc22d7f9935718119641c2a86ac15a9Swap Exact Token...128531672021-07-24 20:54:41498 days 17 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690 FTM0.00766305
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xcd701eaf34cfbf63e6e3a4e916429343cd0e86994042c2df79799f86c137f0df384060032022-05-17 1:21:05202 days 13 hrs ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469 Fantom Finance: Wrapped Fantom Token58.599999999999991808 FTM
0xcd701eaf34cfbf63e6e3a4e916429343cd0e86994042c2df79799f86c137f0df384060032022-05-17 1:21:05202 days 13 hrs ago 0x5532c3d7cf745e6bd33db1c15c6390070edaaf2a 0x18b1cef6fab48c2c006bacb6ef267ad26da1b46958.599999999999991808 FTM
0x4043e62b07b77ca334e1509ff37105ea2be90a707e19d554e06231ae4ff1737d91060942021-06-07 11:49:21546 days 2 hrs ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690x94e5621fbc9c02822e0733ec996ff3bf2d5edac645.23888172735159104 FTM
0x4043e62b07b77ca334e1509ff37105ea2be90a707e19d554e06231ae4ff1737d91060942021-06-07 11:49:21546 days 2 hrs ago Fantom Finance: Wrapped Fantom Token 0x18b1cef6fab48c2c006bacb6ef267ad26da1b46945.23888172735159104 FTM
0x6638a9bedeff102251c84b28bf3fc816e70c9a31e836dfa870902d9921207a8589650912021-06-05 16:57:03547 days 21 hrs ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690xa358bc72b8d7951e44cb2423e084d7abbb692200166,349.469473574794015238 FTM
0x6638a9bedeff102251c84b28bf3fc816e70c9a31e836dfa870902d9921207a8589650912021-06-05 16:57:03547 days 21 hrs ago Fantom Finance: Wrapped Fantom Token 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469166,349.469473574794015238 FTM
0xccd075ab773e250041a822f6f27b58506699d7fcd3c439cb890bcf165eaa523589531582021-06-05 13:37:51548 days 57 mins ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690xa358bc72b8d7951e44cb2423e084d7abbb692200710 wei
0xccd075ab773e250041a822f6f27b58506699d7fcd3c439cb890bcf165eaa523589531582021-06-05 13:37:51548 days 57 mins ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469 Fantom Finance: Wrapped Fantom Token163,849.99999999999999929 FTM
0xa7cc09cf55ba67412d2e484964d1da07b8dc8982fbcffe5ecdb0ccdfde693a4c89531402021-06-05 13:37:35548 days 58 mins ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469 Fantom Finance: Wrapped Fantom Token20 FTM
0xc76a435e969ae7a89201a85f4e187d06c454442422683926ef94d3f44365363289530452021-06-05 13:36:17548 days 59 mins ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469 Fantom Finance: Wrapped Fantom Token625.312817651822967427 FTM
0x3abe562997ffca9bb4b13a0624a166b48724b9309049af9c011af0fdfa97a07889530162021-06-05 13:35:56548 days 59 mins ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690x0a46d0cbc5a71e979fa3c42832a748d88327d1fc292.246547922870509519 FTM
0x3abe562997ffca9bb4b13a0624a166b48724b9309049af9c011af0fdfa97a07889530162021-06-05 13:35:56548 days 59 mins ago Fantom Finance: Wrapped Fantom Token 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469292.246547922870509519 FTM
0xc7f4c75c35df15c947d5ac080c5799e3b5f4a3c5775d40a8e6571f173ff576d189529552021-06-05 13:35:09548 days 1 hr ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469 Fantom Finance: Wrapped Fantom Token20 FTM
0x202222a2c82f521ed965baa8851d82a4c14bf5cc6bc8bf3fa182c863734eb8b889528872021-06-05 13:34:19548 days 1 hr ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469 Fantom Finance: Wrapped Fantom Token500 FTM
0x6b8be3558a26a5bd64fd50f8626d42190e15d2ba12e0217d613020f0a082bdb489528622021-06-05 13:33:55548 days 1 hr ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690xeb5353f5d8a22928beae40723b13b13dfbe1cabf20.683787929858971638 FTM
0x6b8be3558a26a5bd64fd50f8626d42190e15d2ba12e0217d613020f0a082bdb489528622021-06-05 13:33:55548 days 1 hr ago Fantom Finance: Wrapped Fantom Token 0x18b1cef6fab48c2c006bacb6ef267ad26da1b46920.683787929858971638 FTM
0xce783984158b884df39af77f3620d7d35fc46e3830c3b0a5d2ab2c3fe95c1c9389528592021-06-05 13:33:52548 days 1 hr ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469 Fantom Finance: Wrapped Fantom Token500 FTM
0x4a4efb40c8e5a2c75c2a6bdc42144ab17e6bae8b942677af45d35fd3548fa95a89528162021-06-05 13:33:13548 days 1 hr ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690xeb5353f5d8a22928beae40723b13b13dfbe1cabf30.194338490707016537 FTM
0x4a4efb40c8e5a2c75c2a6bdc42144ab17e6bae8b942677af45d35fd3548fa95a89528162021-06-05 13:33:13548 days 1 hr ago Fantom Finance: Wrapped Fantom Token 0x18b1cef6fab48c2c006bacb6ef267ad26da1b46930.194338490707016537 FTM
0x55fe106423066e4315645995954c2859c294e9e159776cd0ce1ddf03d2c869a589528042021-06-05 13:32:57548 days 1 hr ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690xeb5353f5d8a22928beae40723b13b13dfbe1cabf36.14940417221103583 FTM
0x55fe106423066e4315645995954c2859c294e9e159776cd0ce1ddf03d2c869a589528042021-06-05 13:32:57548 days 1 hr ago Fantom Finance: Wrapped Fantom Token 0x18b1cef6fab48c2c006bacb6ef267ad26da1b46936.14940417221103583 FTM
0xda60b27d6b4677cab59a51bd585e7bc97a0da2eae5ea8339b90e02c8cca740a489527762021-06-05 13:32:36548 days 1 hr ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690xeb5353f5d8a22928beae40723b13b13dfbe1cabf44.060231921941633647 FTM
0xda60b27d6b4677cab59a51bd585e7bc97a0da2eae5ea8339b90e02c8cca740a489527762021-06-05 13:32:36548 days 1 hr ago Fantom Finance: Wrapped Fantom Token 0x18b1cef6fab48c2c006bacb6ef267ad26da1b46944.060231921941633647 FTM
0x45ae1e1f0fc71f328beb68e1275501e6e819e3ce232898e4be3ba616f5fd696389527462021-06-05 13:32:07548 days 1 hr ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b469 Fantom Finance: Wrapped Fantom Token2,538.012709551535937384 FTM
0x5f4585c1904a459fa132fea76d1091cda45f0d626037ef3a2c17c49fdd4da99b89525472021-06-05 13:28:54548 days 1 hr ago 0x18b1cef6fab48c2c006bacb6ef267ad26da1b4690xca33c7f9fb39b313d8973b1e54e5c7c8966dccf30.015665068692984183 FTM
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Contract Source Code Verified (Exact Match)

Contract Name:
AuraSwapRouter

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 9 : AuraSwapRouter.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.12;

import '../interfaces/IAuraSwapRouter.sol';
import '../interfaces/IAuraSwapFactory.sol';
import '../libraries/AuraSwapLibrary.sol';
import '../libraries/TransferHelper.sol';
import '../libraries/AuraSwapSafeMath.sol';
import '../interfaces/IERC20.sol';
import '../interfaces/IWETH.sol';

contract AuraSwapRouter is IAuraSwapRouter {
    using AuraSwapSafeMath for uint;

    address public immutable override factory;
    address public immutable override WETH;

    modifier ensure(uint deadline) {
        require(deadline >= block.timestamp, 'AuraSwapRouter: EXPIRED');
        _;
    }

    constructor(address _factory, address _WETH) public {
        factory = _factory;
        WETH = _WETH;
    }

    receive() external payable {
        assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
    }

    // **** ADD LIQUIDITY ****
    function _addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin
    ) internal virtual returns (uint amountA, uint amountB) {
        // create the pair if it doesn't exist yet
        if (IAuraSwapFactory(factory).getPair(tokenA, tokenB) == address(0)) {
            IAuraSwapFactory(factory).createPair(tokenA, tokenB);
        }
        (uint reserveA, uint reserveB) = AuraSwapLibrary.getReserves(factory, tokenA, tokenB);
        if (reserveA == 0 && reserveB == 0) {
            (amountA, amountB) = (amountADesired, amountBDesired);
        } else {
            uint amountBOptimal = AuraSwapLibrary.quote(amountADesired, reserveA, reserveB);
            if (amountBOptimal <= amountBDesired) {
                require(amountBOptimal >= amountBMin, 'AuraSwapRouter: INSUFFICIENT_B_AMOUNT');
                (amountA, amountB) = (amountADesired, amountBOptimal);
            } else {
                uint amountAOptimal = AuraSwapLibrary.quote(amountBDesired, reserveB, reserveA);
                assert(amountAOptimal <= amountADesired);
                require(amountAOptimal >= amountAMin, 'AuraSwapRouter: INSUFFICIENT_A_AMOUNT');
                (amountA, amountB) = (amountAOptimal, amountBDesired);
            }
        }
    }
    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external virtual override ensure(deadline) returns (uint amountA, uint amountB, uint liquidity) {
        (amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
        address pair = AuraSwapLibrary.pairFor(factory, tokenA, tokenB);
        TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
        TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
        liquidity = IAuraSwapPair(pair).mint(to);
    }
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external virtual override payable ensure(deadline) returns (uint amountToken, uint amountETH, uint liquidity) {
        (amountToken, amountETH) = _addLiquidity(
            token,
            WETH,
            amountTokenDesired,
            msg.value,
            amountTokenMin,
            amountETHMin
        );
        address pair = AuraSwapLibrary.pairFor(factory, token, WETH);
        TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
        IWETH(WETH).deposit{value: amountETH}();
        assert(IWETH(WETH).transfer(pair, amountETH));
        liquidity = IAuraSwapPair(pair).mint(to);
        // refund dust eth, if any
        if (msg.value > amountETH) TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
    }

    // **** REMOVE LIQUIDITY ****
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) public virtual override ensure(deadline) returns (uint amountA, uint amountB) {
        address pair = AuraSwapLibrary.pairFor(factory, tokenA, tokenB);
        IAuraSwapPair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
        (uint amount0, uint amount1) = IAuraSwapPair(pair).burn(to);
        (address token0,) = AuraSwapLibrary.sortTokens(tokenA, tokenB);
        (amountA, amountB) = tokenA == token0 ? (amount0, amount1) : (amount1, amount0);
        require(amountA >= amountAMin, 'AuraSwapRouter: INSUFFICIENT_A_AMOUNT');
        require(amountB >= amountBMin, 'AuraSwapRouter: INSUFFICIENT_B_AMOUNT');
    }
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) public virtual override ensure(deadline) returns (uint amountToken, uint amountETH) {
        (amountToken, amountETH) = removeLiquidity(
            token,
            WETH,
            liquidity,
            amountTokenMin,
            amountETHMin,
            address(this),
            deadline
        );
        TransferHelper.safeTransfer(token, to, amountToken);
        IWETH(WETH).withdraw(amountETH);
        TransferHelper.safeTransferETH(to, 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 virtual override returns (uint amountA, uint amountB) {
        address pair = AuraSwapLibrary.pairFor(factory, tokenA, tokenB);
        uint value = approveMax ? uint(-1) : liquidity;
        IAuraSwapPair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
        (amountA, amountB) = removeLiquidity(tokenA, tokenB, liquidity, amountAMin, amountBMin, to, deadline);
    }
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external virtual override returns (uint amountToken, uint amountETH) {
        address pair = AuraSwapLibrary.pairFor(factory, token, WETH);
        uint value = approveMax ? uint(-1) : liquidity;
        IAuraSwapPair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
        (amountToken, amountETH) = removeLiquidityETH(token, liquidity, amountTokenMin, amountETHMin, to, deadline);
    }

    // **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) public virtual override ensure(deadline) returns (uint amountETH) {
        (, amountETH) = removeLiquidity(
            token,
            WETH,
            liquidity,
            amountTokenMin,
            amountETHMin,
            address(this),
            deadline
        );
        TransferHelper.safeTransfer(token, to, IERC20(token).balanceOf(address(this)));
        IWETH(WETH).withdraw(amountETH);
        TransferHelper.safeTransferETH(to, amountETH);
    }
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external virtual override returns (uint amountETH) {
        address pair = AuraSwapLibrary.pairFor(factory, token, WETH);
        uint value = approveMax ? uint(-1) : liquidity;
        IAuraSwapPair(pair).permit(msg.sender, address(this), value, deadline, v, r, s);
        amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
            token, liquidity, amountTokenMin, amountETHMin, to, deadline
        );
    }

    // **** SWAP ****
    // requires the initial amount to have already been sent to the first pair
    function _swap(uint[] memory amounts, address[] memory path, address _to) internal virtual {
        for (uint i; i < path.length - 1; i++) {
            (address input, address output) = (path[i], path[i + 1]);
            (address token0,) = AuraSwapLibrary.sortTokens(input, output);
            uint amountOut = amounts[i + 1];
            (uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOut) : (amountOut, uint(0));
            address to = i < path.length - 2 ? AuraSwapLibrary.pairFor(factory, output, path[i + 2]) : _to;
            IAuraSwapPair(AuraSwapLibrary.pairFor(factory, input, output)).swap(
                amount0Out, amount1Out, to, new bytes(0)
            );
        }
    }
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external virtual override ensure(deadline) returns (uint[] memory amounts) {
        amounts = AuraSwapLibrary.getAmountsOut(factory, amountIn, path);
        require(amounts[amounts.length - 1] >= amountOutMin, 'AuraSwapRouter: INSUFFICIENT_OUTPUT_AMOUNT');
        TransferHelper.safeTransferFrom(
            path[0], msg.sender, AuraSwapLibrary.pairFor(factory, path[0], path[1]), amounts[0]
        );
        _swap(amounts, path, to);
    }
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external virtual override ensure(deadline) returns (uint[] memory amounts) {
        amounts = AuraSwapLibrary.getAmountsIn(factory, amountOut, path);
        require(amounts[0] <= amountInMax, 'AuraSwapRouter: EXCESSIVE_INPUT_AMOUNT');
        TransferHelper.safeTransferFrom(
            path[0], msg.sender, AuraSwapLibrary.pairFor(factory, path[0], path[1]), amounts[0]
        );
        _swap(amounts, path, to);
    }
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        virtual
        override
        payable
        ensure(deadline)
        returns (uint[] memory amounts)
    {
        require(path[0] == WETH, 'AuraSwapRouter: INVALID_PATH');
        amounts = AuraSwapLibrary.getAmountsOut(factory, msg.value, path);
        require(amounts[amounts.length - 1] >= amountOutMin, 'AuraSwapRouter: INSUFFICIENT_OUTPUT_AMOUNT');
        IWETH(WETH).deposit{value: amounts[0]}();
        assert(IWETH(WETH).transfer(AuraSwapLibrary.pairFor(factory, path[0], path[1]), amounts[0]));
        _swap(amounts, path, to);
    }
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        virtual
        override
        ensure(deadline)
        returns (uint[] memory amounts)
    {
        require(path[path.length - 1] == WETH, 'AuraSwapRouter: INVALID_PATH');
        amounts = AuraSwapLibrary.getAmountsIn(factory, amountOut, path);
        require(amounts[0] <= amountInMax, 'AuraSwapRouter: EXCESSIVE_INPUT_AMOUNT');
        TransferHelper.safeTransferFrom(
            path[0], msg.sender, AuraSwapLibrary.pairFor(factory, path[0], path[1]), amounts[0]
        );
        _swap(amounts, path, address(this));
        IWETH(WETH).withdraw(amounts[amounts.length - 1]);
        TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
    }
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        virtual
        override
        ensure(deadline)
        returns (uint[] memory amounts)
    {
        require(path[path.length - 1] == WETH, 'AuraSwapRouter: INVALID_PATH');
        amounts = AuraSwapLibrary.getAmountsOut(factory, amountIn, path);
        require(amounts[amounts.length - 1] >= amountOutMin, 'AuraSwapRouter: INSUFFICIENT_OUTPUT_AMOUNT');
        TransferHelper.safeTransferFrom(
            path[0], msg.sender, AuraSwapLibrary.pairFor(factory, path[0], path[1]), amounts[0]
        );
        _swap(amounts, path, address(this));
        IWETH(WETH).withdraw(amounts[amounts.length - 1]);
        TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
    }
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        virtual
        override
        payable
        ensure(deadline)
        returns (uint[] memory amounts)
    {
        require(path[0] == WETH, 'AuraSwapRouter: INVALID_PATH');
        amounts = AuraSwapLibrary.getAmountsIn(factory, amountOut, path);
        require(amounts[0] <= msg.value, 'AuraSwapRouter: EXCESSIVE_INPUT_AMOUNT');
        IWETH(WETH).deposit{value: amounts[0]}();
        assert(IWETH(WETH).transfer(AuraSwapLibrary.pairFor(factory, path[0], path[1]), amounts[0]));
        _swap(amounts, path, to);
        // refund dust eth, if any
        if (msg.value > amounts[0]) TransferHelper.safeTransferETH(msg.sender, msg.value - amounts[0]);
    }

    // **** SWAP (supporting fee-on-transfer tokens) ****
    // requires the initial amount to have already been sent to the first pair
    function _swapSupportingFeeOnTransferTokens(address[] memory path, address _to) internal virtual {
        for (uint i; i < path.length - 1; i++) {
            (address input, address output) = (path[i], path[i + 1]);
            (address token0,) = AuraSwapLibrary.sortTokens(input, output);
            IAuraSwapPair pair = IAuraSwapPair(AuraSwapLibrary.pairFor(factory, input, output));
            uint amountInput;
            uint amountOutput;
            { // scope to avoid stack too deep errors
            (uint reserve0, uint reserve1,) = pair.getReserves();
            (uint reserveInput, uint reserveOutput) = input == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
            amountInput = IERC20(input).balanceOf(address(pair)).sub(reserveInput);
            amountOutput = AuraSwapLibrary.getAmountOut(amountInput, reserveInput, reserveOutput);
            }
            (uint amount0Out, uint amount1Out) = input == token0 ? (uint(0), amountOutput) : (amountOutput, uint(0));
            address to = i < path.length - 2 ? AuraSwapLibrary.pairFor(factory, output, path[i + 2]) : _to;
            pair.swap(amount0Out, amount1Out, to, new bytes(0));
        }
    }
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external virtual override ensure(deadline) {
        TransferHelper.safeTransferFrom(
            path[0], msg.sender, AuraSwapLibrary.pairFor(factory, path[0], path[1]), amountIn
        );
        uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
        _swapSupportingFeeOnTransferTokens(path, to);
        require(
            IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
            'AuraSwapRouter: INSUFFICIENT_OUTPUT_AMOUNT'
        );
    }
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    )
        external
        virtual
        override
        payable
        ensure(deadline)
    {
        require(path[0] == WETH, 'AuraSwapRouter: INVALID_PATH');
        uint amountIn = msg.value;
        IWETH(WETH).deposit{value: amountIn}();
        assert(IWETH(WETH).transfer(AuraSwapLibrary.pairFor(factory, path[0], path[1]), amountIn));
        uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
        _swapSupportingFeeOnTransferTokens(path, to);
        require(
            IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >= amountOutMin,
            'AuraSwapRouter: INSUFFICIENT_OUTPUT_AMOUNT'
        );
    }
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    )
        external
        virtual
        override
        ensure(deadline)
    {
        require(path[path.length - 1] == WETH, 'AuraSwapRouter: INVALID_PATH');
        TransferHelper.safeTransferFrom(
            path[0], msg.sender, AuraSwapLibrary.pairFor(factory, path[0], path[1]), amountIn
        );
        _swapSupportingFeeOnTransferTokens(path, address(this));
        uint amountOut = IERC20(WETH).balanceOf(address(this));
        require(amountOut >= amountOutMin, 'AuraSwapRouter: INSUFFICIENT_OUTPUT_AMOUNT');
        IWETH(WETH).withdraw(amountOut);
        TransferHelper.safeTransferETH(to, amountOut);
    }

    // **** LIBRARY FUNCTIONS ****
    function quote(uint amountA, uint reserveA, uint reserveB) public pure virtual override returns (uint amountB) {
        return AuraSwapLibrary.quote(amountA, reserveA, reserveB);
    }

    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut)
        public
        pure
        virtual
        override
        returns (uint amountOut)
    {
        return AuraSwapLibrary.getAmountOut(amountIn, reserveIn, reserveOut);
    }

    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut)
        public
        pure
        virtual
        override
        returns (uint amountIn)
    {
        return AuraSwapLibrary.getAmountIn(amountOut, reserveIn, reserveOut);
    }

    function getAmountsOut(uint amountIn, address[] memory path)
        public
        view
        virtual
        override
        returns (uint[] memory amounts)
    {
        return AuraSwapLibrary.getAmountsOut(factory, amountIn, path);
    }

    function getAmountsIn(uint amountOut, address[] memory path)
        public
        view
        virtual
        override
        returns (uint[] memory amounts)
    {
        return AuraSwapLibrary.getAmountsIn(factory, amountOut, path);
    }
}

File 2 of 9 : IAuraSwapFactory.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.12;

interface IAuraSwapFactory {
    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;
}

File 3 of 9 : IAuraSwapPair.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.12;

interface IAuraSwapPair {
    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;
}

File 4 of 9 : IAuraSwapRouter.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.12;

interface IAuraSwapRouter {
    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);

    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;
}

File 5 of 9 : IERC20.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.12;

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);
}

File 6 of 9 : IWETH.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.12;

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

File 7 of 9 : AuraSwapLibrary.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.12;

import '../interfaces/IAuraSwapPair.sol';
import "./AuraSwapSafeMath.sol";

library AuraSwapLibrary {
    using AuraSwapSafeMath for uint;

    // returns sorted token addresses, used to handle return values from pairs sorted in this order
    function sortTokens(address tokenA, address tokenB) internal pure returns (address token0, address token1) {
        require(tokenA != tokenB, 'AuraSwapLibrary: IDENTICAL_ADDRESSES');
        (token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'AuraSwapLibrary: ZERO_ADDRESS');
    }

    // calculates the CREATE2 address for a pair without making any external calls
    function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
        (address token0, address token1) = sortTokens(tokenA, tokenB);
        pair = address(uint(keccak256(abi.encodePacked(
                hex'ff',
                factory,
                keccak256(abi.encodePacked(token0, token1)),
                hex'ff350a53f9ae1913779afa3a76b73415a6693cfab2fda3647245b61a78daedae' // init code hash
            ))));
    }

    // fetches and sorts the reserves for a pair
    function getReserves(address factory, address tokenA, address tokenB) internal view returns (uint reserveA, uint reserveB) {
        (address token0,) = sortTokens(tokenA, tokenB);
        (uint reserve0, uint reserve1,) = IAuraSwapPair(pairFor(factory, tokenA, tokenB)).getReserves();
        (reserveA, reserveB) = tokenA == token0 ? (reserve0, reserve1) : (reserve1, reserve0);
    }

    // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
    function quote(uint amountA, uint reserveA, uint reserveB) internal pure returns (uint amountB) {
        require(amountA > 0, 'AuraSwapLibrary: INSUFFICIENT_AMOUNT');
        require(reserveA > 0 && reserveB > 0, 'AuraSwapLibrary: INSUFFICIENT_LIQUIDITY');
        amountB = amountA.mul(reserveB) / reserveA;
    }

    // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) internal pure returns (uint amountOut) {
        require(amountIn > 0, 'AuraSwapLibrary: INSUFFICIENT_INPUT_AMOUNT');
        require(reserveIn > 0 && reserveOut > 0, 'AuraSwapLibrary: INSUFFICIENT_LIQUIDITY');
        uint amountInWithFee = amountIn.mul(997);
        uint numerator = amountInWithFee.mul(reserveOut);
        uint denominator = reserveIn.mul(1000).add(amountInWithFee);
        amountOut = numerator / denominator;
    }

    // given an output amount of an asset and pair reserves, returns a required input amount of the other asset
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) internal pure returns (uint amountIn) {
        require(amountOut > 0, 'AuraSwapLibrary: INSUFFICIENT_OUTPUT_AMOUNT');
        require(reserveIn > 0 && reserveOut > 0, 'AuraSwapLibrary: INSUFFICIENT_LIQUIDITY');
        uint numerator = reserveIn.mul(amountOut).mul(1000);
        uint denominator = reserveOut.sub(amountOut).mul(997);
        amountIn = (numerator / denominator).add(1);
    }

    // performs chained getAmountOut calculations on any number of pairs
    function getAmountsOut(address factory, uint amountIn, address[] memory path) internal view returns (uint[] memory amounts) {
        require(path.length >= 2, 'AuraSwapLibrary: INVALID_PATH');
        amounts = new uint[](path.length);
        amounts[0] = amountIn;
        for (uint i; i < path.length - 1; i++) {
            (uint reserveIn, uint reserveOut) = getReserves(factory, path[i], path[i + 1]);
            amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
        }
    }

    // performs chained getAmountIn calculations on any number of pairs
    function getAmountsIn(address factory, uint amountOut, address[] memory path) internal view returns (uint[] memory amounts) {
        require(path.length >= 2, 'AuraSwapLibrary: INVALID_PATH');
        amounts = new uint[](path.length);
        amounts[amounts.length - 1] = amountOut;
        for (uint i = path.length - 1; i > 0; i--) {
            (uint reserveIn, uint reserveOut) = getReserves(factory, path[i - 1], path[i]);
            amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
        }
    }
}

File 8 of 9 : AuraSwapSafeMath.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.12;

// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)

library AuraSwapSafeMath {
    function add(uint x, uint y) internal pure returns (uint z) {
        require((z = x + y) >= x, 'ds-math-add-overflow');
    }

    function sub(uint x, uint y) internal pure returns (uint z) {
        require((z = x - y) <= x, 'ds-math-sub-underflow');
    }

    function mul(uint x, uint y) internal pure returns (uint z) {
        require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
    }
}

File 9 of 9 : TransferHelper.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity =0.6.12;

// 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, uint 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: APPROVE_FAILED');
    }

    function safeTransfer(address token, address to, uint 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: TRANSFER_FAILED');
    }

    function safeTransferFrom(address token, address from, address to, uint 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: TRANSFER_FROM_FAILED');
    }

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

Settings
{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_factory","type":"address"},{"internalType":"address","name":"_WETH","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"WETH","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"},{"internalType":"uint256","name":"amountADesired","type":"uint256"},{"internalType":"uint256","name":"amountBDesired","type":"uint256"},{"internalType":"uint256","name":"amountAMin","type":"uint256"},{"internalType":"uint256","name":"amountBMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"addLiquidity","outputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"amountB","type":"uint256"},{"internalType":"uint256","name":"liquidity","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amountTokenDesired","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"addLiquidityETH","outputs":[{"internalType":"uint256","name":"amountToken","type":"uint256"},{"internalType":"uint256","name":"amountETH","type":"uint256"},{"internalType":"uint256","name":"liquidity","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"reserveIn","type":"uint256"},{"internalType":"uint256","name":"reserveOut","type":"uint256"}],"name":"getAmountIn","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"reserveIn","type":"uint256"},{"internalType":"uint256","name":"reserveOut","type":"uint256"}],"name":"getAmountOut","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"}],"name":"getAmountsIn","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"}],"name":"getAmountsOut","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"reserveA","type":"uint256"},{"internalType":"uint256","name":"reserveB","type":"uint256"}],"name":"quote","outputs":[{"internalType":"uint256","name":"amountB","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountAMin","type":"uint256"},{"internalType":"uint256","name":"amountBMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"removeLiquidity","outputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"amountB","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"removeLiquidityETH","outputs":[{"internalType":"uint256","name":"amountToken","type":"uint256"},{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"removeLiquidityETHSupportingFeeOnTransferTokens","outputs":[{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bool","name":"approveMax","type":"bool"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"removeLiquidityETHWithPermit","outputs":[{"internalType":"uint256","name":"amountToken","type":"uint256"},{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bool","name":"approveMax","type":"bool"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"removeLiquidityETHWithPermitSupportingFeeOnTransferTokens","outputs":[{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountAMin","type":"uint256"},{"internalType":"uint256","name":"amountBMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bool","name":"approveMax","type":"bool"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"removeLiquidityWithPermit","outputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"amountB","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapETHForExactTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactETHForTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactETHForTokensSupportingFeeOnTransferTokens","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForETH","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForETHSupportingFeeOnTransferTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForTokensSupportingFeeOnTransferTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMax","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapTokensForExactETH","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMax","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapTokensForExactTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","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)

0000000000000000000000003eba855443ad4dee22603b9ce6187e6aa67b435d00000000000000000000000021be370d5312f44cb42ce377bc9b8a0cef1a4c83

-----Decoded View---------------
Arg [0] : _factory (address): 0x3eba855443ad4dee22603b9ce6187e6aa67b435d
Arg [1] : _WETH (address): 0x21be370d5312f44cb42ce377bc9b8a0cef1a4c83

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000003eba855443ad4dee22603b9ce6187e6aa67b435d
Arg [1] : 00000000000000000000000021be370d5312f44cb42ce377bc9b8a0cef1a4c83


Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Validator ID :
0 FTM

Amount Staked
0

Amount Delegated
0

Staking Total
0

Staking Start Epoch
0

Staking Start Time
0

Proof of Importance
0

Origination Score
0

Validation Score
0

Active
0

Online
0

Downtime
0 s
Address Amount claimed Rewards Created On Epoch Created On
Block Uncle Number Difficulty Gas Used Reward
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