Contract 0x3657952d7bA5A0A4799809b5B6fdfF9ec5B46293 3

 
 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0xd9a5a3ceddd54c6a8c8ab070b6806e91dcac8261e6de1418e77a0a63b6ca45f9Create Pair57068662021-03-15 16:35:25226 days 46 mins agoWardenSwap: Deployer IN  0x3657952d7ba5a0a4799809b5b6fdff9ec5b462930 BNB0.02493762
0x6d2a4a2a7b11d5cd5a61193e86260ef40aead7182f177828d8dd01e2bc4a299cCreate Pair57068012021-03-15 16:32:10226 days 49 mins agoWardenSwap: Deployer IN  0x3657952d7ba5a0a4799809b5b6fdff9ec5b462930 BNB0.02493762
0x5a3e4e6b3bf86c065488fd86b46bd43e85bdb200991cceb37e116a4ad7c3a718Create Pair57067712021-03-15 16:30:40226 days 50 mins agoWardenSwap: Deployer IN  0x3657952d7ba5a0a4799809b5b6fdff9ec5b462930 BNB0.02493762
0x1a5c5d92f02bb244a95c6a3b9e279e004d261dd4156d7aa6987db27e59fc6186Create Pair57064112021-03-15 16:12:40226 days 1 hr agoWardenSwap: Deployer IN  0x3657952d7ba5a0a4799809b5b6fdff9ec5b462930 BNB0.02493762
0x54d7845160824840dd624b3963a4ed4c2306bfa2b697523b161d30ab882db1e4Create Pair57063662021-03-15 16:10:25226 days 1 hr agoWardenSwap: Deployer IN  0x3657952d7ba5a0a4799809b5b6fdff9ec5b462930 BNB0.02493762
0x9eee4c7eab907a2dc0fa5e2fe9d25143575f3114df6fa806abca758144bdcd56Create Pair57062792021-03-15 16:06:04226 days 1 hr agoWardenSwap: Deployer IN  0x3657952d7ba5a0a4799809b5b6fdff9ec5b462930 BNB0.02508762
0x1df2a320d7090342960cec243d4708e19df2d5d69acc6aef40f148939f4ef7b2Set Fee To57058662021-03-15 15:45:25226 days 1 hr agoWardenSwap: Deployer IN  0x3657952d7ba5a0a4799809b5b6fdff9ec5b462930 BNB0.0004336
0x587abc7ccc4f47144980dd070526f2e2c288c0848673a0776ff3bde858141e970x6080604057058402021-03-15 15:44:07226 days 1 hr agoWardenSwap: Deployer IN  Contract Creation0 BNB0.03089562
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0xd76886d0dfcf667b8b612a67b16ec8725a45e8c11708828e1937e1c58e6b99bf121393062021-10-27 16:00:251 hr 21 mins ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x889233f92a2478ff7b3ab9b224d3564eb18c56f484b0b614ceab56ebf57a8ada120185572021-10-23 10:11:134 days 7 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xba1ce0ecd2e9be1a96fb3fc9c5f2ffb357a4f9815c87d865bd5ce4f4f6f50a33115368472021-10-06 12:43:2221 days 4 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x23d1cf38bbf7a45d5d0e18933753052d4eaa7887549b00e90a3e7f84de9e7e31115144362021-10-05 18:00:4921 days 23 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x861bd3f5a8faac4683df08bf3d1873b5d53bdf23f446c5abb7ac46f4700e2739113890362021-10-01 8:50:5726 days 8 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x4a5879efceb7e1fe6e07a85d1c6350fb86bb94718fc5c5e99ebc5e26794e56fe110879192021-09-20 19:56:3936 days 21 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xead162b09da7ffa0e77875814a381947dff606d6d9cf32e3ca4b103635ae8361110848172021-09-20 17:21:3237 days ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x4ccbe3cb329947b4abc848e5aa4299c399a232075e5e40d22f5400ccd2fe4cc4110759812021-09-20 9:57:2237 days 7 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x182e0f5f4f4cf1d64026352e07d4a750a6dbbed430c334579b8c4f8bfd362d8d109113462021-09-14 16:14:0743 days 1 hr ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x045d5be7c8e33acec6639798c246191e8e10d7b31a4e1b7ab1f605142687a612109035352021-09-14 9:42:1643 days 7 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xab0bcc3b2aa702ab475cede5be346abb937acf9d72f5574325f5ff9fd6a7df07108280692021-09-11 18:39:3245 days 22 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xcaaf9c3fbdff9d31b54029c21b8f8aec32314b805d45cdf5e7c0d140835fa84c108100602021-09-11 3:32:2046 days 13 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xaca8d54619a74e422b93bc035cd46e8440a0f9393fd70784c5de4028c6772159104298242021-08-28 19:12:5159 days 22 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x592c2bcaa7301b6af07d5e2ff001efd13a01f1bb19c3dc076a4f16890ea274b2104248232021-08-28 14:56:1960 days 2 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x27519b03738364e4ad74c1f179d856f3430318c5f6a794d52998921735ef03a7100867182021-08-16 18:49:5371 days 22 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xfc0d62c2f8123d2d9a6210025cb6d405fd3ad77ef9caf4160a2835e80433603a99415452021-08-11 15:51:5577 days 1 hr ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x8edfa9214e685f5a5e109a3fad51eae945949146ba86860605676c0043f94caa99413922021-08-11 15:44:1677 days 1 hr ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x5a15c3c968bf059cdacbf2898eaedec814ce23c4b9f75cd6041607c944b6c85c99019532021-08-10 6:10:4878 days 11 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xfe6d035bb69115364be4b9986cb99e455996c95c0375f82523e3c164c37b9e5998981862021-08-10 3:01:1478 days 14 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x90924162af8a76f5ebdd0c5a8a72fc8107515678e34812b9cf7ab7a24bf37a3198521912021-08-08 11:51:0680 days 5 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xa2117f5601e7ad1548eab3d5404934baa62845e93707fc49a64becc2f761006096186012021-07-31 2:24:1888 days 14 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0x176ca75ad0ef351f96868fc91e87c44d78e2bd369c77ff940ebd97f8f146933c95912162021-07-30 3:13:4889 days 14 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xf1f9bfa1cad63d5e7ea0cee999a97b9e88f8098db74edf5d89baff4cd82a563695816462021-07-29 18:57:0089 days 22 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xa100b219763d4395a89f69e8fb937c7220ab72bbedee7e7c9c4ee68812a3610693846582021-07-22 16:43:5897 days 37 mins ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
0xd24ba457ccc2546dcfbba00af0d8f2164d5635b7960a6e680bff27ae26f9078f93323992021-07-20 21:10:1698 days 20 hrs ago 0x3657952d7ba5a0a4799809b5b6fdff9ec5b46293  Contract Creation0 BNB
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Contract Source Code Verified (Similar Match)
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xB89cE8Fb7664073Bcd04E720Df9c2d8cD53B2e37

Contract Name:
WardenFactory

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 1000000 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at BscScan.com on 2021-03-14
*/

// SPDX-License-Identifier: MIT

// ((/*,                                                                    ,*((/,.
// &&@@&&%#/*.                                                        .*(#&&@@@@%. 
// &&@@@@@@@&%(.                                                    ,#%&@@@@@@@@%. 
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// &&@@@@@@@@@@@&&/.                                            .(&&@@@@@@@@@@@@%. 
// %&@@@@@@@@@@@@@&(,                                          *#&@@@@@@@@@@@@@@%. 
// #&@@@@@@@@@@@@@@&#*                                       .*#@@@@@@@@@@@@@@@&#. 
// #&@@@@@@@@@@@@@@@@#.                                      ,%&@@@@@@@@@@@@@@@&#. 
// #&@@@@@@@@@@@@@@@@%(,                                    ,(&@@@@@@@@@@@@@@@@&#. 
// #&@@@@@@@@@@@@@@@@&&/                                   .(%&@@@@@@@@@@@@@@@@&#. 
// #%@@@@@@@@@@@@@@@@@@(.               ,(/,.              .#&@@@@@@@@@@@@@@@@@&#. 
// (%@@@@@@@@@@@@@@@@@@#*.            ./%&&&/.            .*%@@@@@@@@@@@@@@@@@@%(. 
// (%@@@@@@@@@@@@@@@@@@#*.           *#&@@@@&%*.          .*%@@@@@@@@@@@@@@@@@@%(. 
// (%@@@@@@@@@@@@@@@@@@#/.         ./#@@@@@@@@%(.         ./%@@@@@@@@@@@@@@@@@@%(. 
// (%@@@@@@@@@@@@@@@@@@#/.        ./&@@@@@@@@@@&(*        ,/%@@@@@@@@@@@@@@@@@@%(. 
// (%@@@@@@@@@@@@@@@@@@%/.       ,#&@@@@@@@@@@@@&#,.      ,/%@@@@@@@@@@@@@@@@@@%(. 
// /%@@@@@@@@@@@@@@@@@@#/.      *(&@@@@@@@@@@@@@@&&*      ./%@@@@@@@@@@@@@@@@@&%(. 
// /%@@@@@@@@@@@@@@@@@@#/.     .(&@@@@@@@@@@@@@@@@@#*.    ,/%@@@@@@@@@@@@@@@@@&#/. 
// ,#@@@@@@@@@@@@@@@@@@#/.    ./%@@@@@@@@@@@@@@@@@@&#,    ,/%@@@@@@@@@@@@@@@@@&(,  
//  /%&@@@@@@@@@@@@@@@@#/.    *#&@@@@@@@@@@@@@@@@@@@&*    ,/%@@@@@@@@@@@@@@@@&%*   
//  .*#&@@@@@@@@@@@@@@@#/.    /&&@@@@@@@@@@@@@@@@@@@&/.   ,/%@@@@@@@@@@@@@@@@#*.   
//    ,(&@@@@@@@@@@@@@@#/.    /@@@@@@@@@@@@@@@@@@@@@&(,   ,/%@@@@@@@@@@@@@@%(,     
//     .*(&&@@@@@@@@@@@#/.    /&&@@@@@@@@@@@@@@@@@@@&/,   ,/%@@@@@@@@@@@&%/,       
//        ./%&@@@@@@@@@#/.    *#&@@@@@@@@@@@@@@@@@@@%*    ,/%@@@@@@@@@&%*          
//           ,/#%&&@@@@#/.     ,#&@@@@@@@@@@@@@@@@@#/.    ,/%@@@@&&%(/,            
//               ./#&@@%/.      ,/&@@@@@@@@@@@@@@%(,      ,/%@@%#*.                
//                   .,,,         ,/%&@@@@@@@@&%(*        .,,,.                    
//                                   ,/%&@@@%(*.                                   
//  .,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,**((/*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
//                                                                                                                                                                                                                                                                                                            
//                                                                                             

// File: contracts/interfaces/IWardenFactory.sol

pragma solidity >=0.5.0;

interface IWardenFactory {
    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: contracts/interfaces/IWardenPair.sol

pragma solidity >=0.5.0;

interface IWardenPair {
    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: contracts/interfaces/IWardenERC20.sol

pragma solidity >=0.5.0;

interface IWardenERC20 {
    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;
}

// File: contracts/libraries/SafeMath.sol

pragma solidity =0.5.16;

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

library SafeMath {
    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: contracts/WardenERC20.sol

pragma solidity =0.5.16;



contract WardenERC20 is IWardenERC20 {
    using SafeMath for uint;

    string public constant name = 'Warden LPs';
    string public constant symbol = 'WAD-LP';
    uint8 public constant decimals = 18;
    uint  public totalSupply;
    mapping(address => uint) public balanceOf;
    mapping(address => mapping(address => uint)) public allowance;

    bytes32 public DOMAIN_SEPARATOR;
    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant PERMIT_TYPEHASH = 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
    mapping(address => uint) public nonces;

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

    constructor() public {
        uint chainId;
        assembly {
            chainId := chainid
        }
        DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)'),
                keccak256(bytes(name)),
                keccak256(bytes('1')),
                chainId,
                address(this)
            )
        );
    }

    function _mint(address to, uint value) internal {
        totalSupply = totalSupply.add(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(address(0), to, value);
    }

    function _burn(address from, uint value) internal {
        balanceOf[from] = balanceOf[from].sub(value);
        totalSupply = totalSupply.sub(value);
        emit Transfer(from, address(0), value);
    }

    function _approve(address owner, address spender, uint value) private {
        allowance[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    function _transfer(address from, address to, uint value) private {
        balanceOf[from] = balanceOf[from].sub(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(from, to, value);
    }

    function approve(address spender, uint value) external returns (bool) {
        _approve(msg.sender, spender, value);
        return true;
    }

    function transfer(address to, uint value) external returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    function transferFrom(address from, address to, uint value) external returns (bool) {
        if (allowance[from][msg.sender] != uint(-1)) {
            allowance[from][msg.sender] = allowance[from][msg.sender].sub(value);
        }
        _transfer(from, to, value);
        return true;
    }

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external {
        require(deadline >= block.timestamp, 'Warden: EXPIRED');
        bytes32 digest = keccak256(
            abi.encodePacked(
                '\x19\x01',
                DOMAIN_SEPARATOR,
                keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
            )
        );
        address recoveredAddress = ecrecover(digest, v, r, s);
        require(recoveredAddress != address(0) && recoveredAddress == owner, 'Warden: INVALID_SIGNATURE');
        _approve(owner, spender, value);
    }
}

// File: contracts/libraries/Math.sol

pragma solidity =0.5.16;

// a library for performing various math operations

library Math {
    function min(uint x, uint y) internal pure returns (uint z) {
        z = x < y ? x : y;
    }

    // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
    function sqrt(uint y) internal pure returns (uint z) {
        if (y > 3) {
            z = y;
            uint x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
}

// File: contracts/libraries/UQ112x112.sol

pragma solidity =0.5.16;

// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))

// range: [0, 2**112 - 1]
// resolution: 1 / 2**112

library UQ112x112 {
    uint224 constant Q112 = 2**112;

    // encode a uint112 as a UQ112x112
    function encode(uint112 y) internal pure returns (uint224 z) {
        z = uint224(y) * Q112; // never overflows
    }

    // divide a UQ112x112 by a uint112, returning a UQ112x112
    function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
        z = x / uint224(y);
    }
}

// File: contracts/interfaces/IERC20.sol

pragma solidity >=0.5.0;

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

    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);
}

// File: contracts/interfaces/IWardenCallee.sol

pragma solidity >=0.5.0;

interface IWardenCallee {
    function wardenCall(address sender, uint amount0, uint amount1, bytes calldata data) external;
}

// File: contracts/WardenPair.sol

pragma solidity =0.5.16;








contract WardenPair is IWardenPair, WardenERC20 {
    using SafeMath  for uint;
    using UQ112x112 for uint224;

    uint public constant MINIMUM_LIQUIDITY = 10**3;
    bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));

    address public factory;
    address public token0;
    address public token1;

    uint112 private reserve0;           // uses single storage slot, accessible via getReserves
    uint112 private reserve1;           // uses single storage slot, accessible via getReserves
    uint32  private blockTimestampLast; // uses single storage slot, accessible via getReserves

    uint public price0CumulativeLast;
    uint public price1CumulativeLast;
    uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event

    uint private unlocked = 1;
    modifier lock() {
        require(unlocked == 1, 'Warden: LOCKED');
        unlocked = 0;
        _;
        unlocked = 1;
    }

    function getReserves() public view returns (uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast) {
        _reserve0 = reserve0;
        _reserve1 = reserve1;
        _blockTimestampLast = blockTimestampLast;
    }

    function _safeTransfer(address token, address to, uint value) private {
        (bool success, bytes memory data) = token.call(abi.encodeWithSelector(SELECTOR, to, value));
        require(success && (data.length == 0 || abi.decode(data, (bool))), 'Warden: TRANSFER_FAILED');
    }

    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);

    constructor() public {
        factory = msg.sender;
    }

    // called once by the factory at time of deployment
    function initialize(address _token0, address _token1) external {
        require(msg.sender == factory, 'Warden: FORBIDDEN'); // sufficient check
        token0 = _token0;
        token1 = _token1;
    }

    // update reserves and, on the first call per block, price accumulators
    function _update(uint balance0, uint balance1, uint112 _reserve0, uint112 _reserve1) private {
        require(balance0 <= uint112(-1) && balance1 <= uint112(-1), 'Warden: OVERFLOW');
        uint32 blockTimestamp = uint32(block.timestamp % 2**32);
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
        if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
            // * never overflows, and + overflow is desired
            price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
            price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
        }
        reserve0 = uint112(balance0);
        reserve1 = uint112(balance1);
        blockTimestampLast = blockTimestamp;
        emit Sync(reserve0, reserve1);
    }

    // if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
    function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
        address feeTo = IWardenFactory(factory).feeTo();
        feeOn = feeTo != address(0);
        uint _kLast = kLast; // gas savings
        if (feeOn) {
            if (_kLast != 0) {
                uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
                uint rootKLast = Math.sqrt(_kLast);
                if (rootK > rootKLast) {
                    uint numerator = totalSupply.mul(rootK.sub(rootKLast));
                    uint denominator = rootK.mul(5).add(rootKLast);
                    uint liquidity = numerator / denominator;
                    if (liquidity > 0) _mint(feeTo, liquidity);
                }
            }
        } else if (_kLast != 0) {
            kLast = 0;
        }
    }

    // this low-level function should be called from a contract which performs important safety checks
    function mint(address to) external lock returns (uint liquidity) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        uint balance0 = IERC20(token0).balanceOf(address(this));
        uint balance1 = IERC20(token1).balanceOf(address(this));
        uint amount0 = balance0.sub(_reserve0);
        uint amount1 = balance1.sub(_reserve1);

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        if (_totalSupply == 0) {
            liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
           _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
        } else {
            liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
        }
        require(liquidity > 0, 'Warden: INSUFFICIENT_LIQUIDITY_MINTED');
        _mint(to, liquidity);

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Mint(msg.sender, amount0, amount1);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function burn(address to) external lock returns (uint amount0, uint amount1) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        address _token0 = token0;                                // gas savings
        address _token1 = token1;                                // gas savings
        uint balance0 = IERC20(_token0).balanceOf(address(this));
        uint balance1 = IERC20(_token1).balanceOf(address(this));
        uint liquidity = balanceOf[address(this)];

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
        amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
        require(amount0 > 0 && amount1 > 0, 'Warden: INSUFFICIENT_LIQUIDITY_BURNED');
        _burn(address(this), liquidity);
        _safeTransfer(_token0, to, amount0);
        _safeTransfer(_token1, to, amount1);
        balance0 = IERC20(_token0).balanceOf(address(this));
        balance1 = IERC20(_token1).balanceOf(address(this));

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Burn(msg.sender, amount0, amount1, to);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external lock {
        require(amount0Out > 0 || amount1Out > 0, 'Warden: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Warden: INSUFFICIENT_LIQUIDITY');

        uint balance0;
        uint balance1;
        { // scope for _token{0,1}, avoids stack too deep errors
        address _token0 = token0;
        address _token1 = token1;
        require(to != _token0 && to != _token1, 'Warden: INVALID_TO');
        if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens
        if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens
        if (data.length > 0) IWardenCallee(to).wardenCall(msg.sender, amount0Out, amount1Out, data);
        balance0 = IERC20(_token0).balanceOf(address(this));
        balance1 = IERC20(_token1).balanceOf(address(this));
        }
        uint amount0In = balance0 > _reserve0 - amount0Out ? balance0 - (_reserve0 - amount0Out) : 0;
        uint amount1In = balance1 > _reserve1 - amount1Out ? balance1 - (_reserve1 - amount1Out) : 0;
        require(amount0In > 0 || amount1In > 0, 'Warden: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
        uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3));
        uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3));
        require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'Warden: K');
        }

        _update(balance0, balance1, _reserve0, _reserve1);
        emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
    }

    // force balances to match reserves
    function skim(address to) external lock {
        address _token0 = token0; // gas savings
        address _token1 = token1; // gas savings
        _safeTransfer(_token0, to, IERC20(_token0).balanceOf(address(this)).sub(reserve0));
        _safeTransfer(_token1, to, IERC20(_token1).balanceOf(address(this)).sub(reserve1));
    }

    // force reserves to match balances
    function sync() external lock {
        _update(IERC20(token0).balanceOf(address(this)), IERC20(token1).balanceOf(address(this)), reserve0, reserve1);
    }
}

// File: contracts/WardenFactory.sol

pragma solidity =0.5.16;



contract WardenFactory is IWardenFactory {
    bytes32 public constant INIT_CODE_PAIR_HASH = keccak256(abi.encodePacked(type(WardenPair).creationCode));

    address public feeTo;
    address public feeToSetter;

    mapping(address => mapping(address => address)) public getPair;
    address[] public allPairs;

    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

    constructor(address _feeToSetter) public {
        feeToSetter = _feeToSetter;
    }

    function allPairsLength() external view returns (uint) {
        return allPairs.length;
    }

    function createPair(address tokenA, address tokenB) external returns (address pair) {
        require(tokenA != tokenB, 'Warden: IDENTICAL_ADDRESSES');
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'Warden: ZERO_ADDRESS');
        require(getPair[token0][token1] == address(0), 'Warden: PAIR_EXISTS'); // single check is sufficient
        bytes memory bytecode = type(WardenPair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        IWardenPair(pair).initialize(token0, token1);
        getPair[token0][token1] = pair;
        getPair[token1][token0] = pair; // populate mapping in the reverse direction
        allPairs.push(pair);
        emit PairCreated(token0, token1, pair, allPairs.length);
    }

    function setFeeTo(address _feeTo) external {
        require(msg.sender == feeToSetter, 'Warden: FORBIDDEN');
        feeTo = _feeTo;
    }

    function setFeeToSetter(address _feeToSetter) external {
        require(msg.sender == feeToSetter, 'Warden: FORBIDDEN');
        feeToSetter = _feeToSetter;
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_feeToSetter","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token0","type":"address"},{"indexed":true,"internalType":"address","name":"token1","type":"address"},{"indexed":false,"internalType":"address","name":"pair","type":"address"},{"indexed":false,"internalType":"uint256","name":"","type":"uint256"}],"name":"PairCreated","type":"event"},{"constant":true,"inputs":[],"name":"INIT_CODE_PAIR_HASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"allPairs","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"allPairsLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"}],"name":"createPair","outputs":[{"internalType":"address","name":"pair","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"feeTo","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"feeToSetter","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"getPair","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_feeTo","type":"address"}],"name":"setFeeTo","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_feeToSetter","type":"address"}],"name":"setFeeToSetter","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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Swarm Source

bzzr://504e7d5d61c613b505eefadc1024fdc2310f7fbcb921b77ee0d73768bdf50d6d
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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