Contract 0x670f55c6284c629c23bae99f585e3f17e8b9fc31

 

Contract Overview

PantherSwap: Factory
Balance:
0 BNB

BNB Value:
$0.00

Token:
 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x6d64057d5382263ee2f952781615c5921e28fa27ce5a28b4b6aaabe841dfe580Create Pair85572702021-06-23 21:00:00120 days 3 hrs ago0xabb0c186de563f7d54bd3f98c220e42980c0bc8a IN  PantherSwap: Factory0 BNB0.00986591
0xbb5c0b2139b44ccbdeee5dab01301c5df79ffc06165d733f1e5a3d008b79b014Create Pair84650312021-06-20 15:47:38123 days 9 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00986591
0xb144e9b2fd3f4b2da3062763f20e03867c2de8d33b5f942a0f41508b3a32631eCreate Pair83405472021-06-16 7:17:30127 days 17 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0xcf2e151705193af74a3297c88862ca72f5ec9720a5f68b702ec439492cf28a68Create Pair81792132021-06-10 15:37:21133 days 9 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.01973182
0x0db47ffa6fc0da222c3fab99d2a811b2de227ef728a4a058299d4df67c2d60b3Create Pair80360152021-06-05 15:59:51138 days 8 hrs agoAutoShark: Deployer IN  PantherSwap: Factory0 BNB0.00986591
0xb9515bfd062592aeaf9394fadeabdf11a56239e3ac391f80915ab18adc7e9806Create Pair77381782021-05-26 6:42:17148 days 18 hrs agoAutoShark: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0x392af7f555bde190deade63eb36791287fc5f4f229a78bdf99240572379ddd44Create Pair75896392021-05-21 2:26:35153 days 22 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00023428
0x7a9a9d6cd00146098f2ea3a3a9c61d4f8044cbfbab18c0430f1f380088fcad0eCreate Pair75895552021-05-21 2:22:23153 days 22 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.01973192
0x59b518db8301c42cbb81cdb9cffd247e8c0996a822106a1a51608a4ea2faa64dCreate Pair75895302021-05-21 2:21:08153 days 22 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.01973182
0x0d5643c232c451204bc5c34e0183f01b580ba459ae8c3d04bd3e3448f787bee5Create Pair75895022021-05-21 2:19:44153 days 22 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.01973182
0x1ec46c96b69584308adff1769beb4a99d231b2bdb9b9a4f509aaf2e1038b52c2Create Pair75893712021-05-21 2:13:11153 days 22 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0x2b4bf78bd8ba3eadcbed74da6d9f93fed1fb36f8c7477fe51e007dac66e9de84Create Pair74929202021-05-17 16:49:41157 days 8 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.01973182
0xe5cda637f35f44672a0a62155f1bce24630ddad7763ab4ce352bbdb2068490d3Create Pair74227352021-05-15 5:26:39159 days 19 hrs agoAutoShark: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0x7dd886f04bea17b564fd2a2b44790228da2b76574236d8d7b6a41fce2cd09a19Create Pair72358762021-05-08 7:09:20166 days 17 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0x51fff349f1dd7fb17cca1f1fcf8e0bf686834afee04ffea6062c449a8e043f98Create Pair72358492021-05-08 7:07:59166 days 17 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0x9fad0f2c60dc01eb11eb88733fe6f94314b877774b11207654816b22ddd6c697Create Pair72358272021-05-08 7:06:53166 days 17 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0x66e82d4ffd2c9de7da5144bc6ddda054fa04a6198cfe256939daee309576918dCreate Pair72358052021-05-08 7:05:47166 days 17 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0x8286834031e42f3fa925099907f2b0355d05d682b299657a0ff7eb5222975eafCreate Pair72357842021-05-08 7:04:44166 days 17 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0x77be666380b682d4a0023940e9080ebf282ce63285e15e848fea9fe0afff01b8Create Pair72357632021-05-08 7:03:41166 days 17 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00986596
0xce6f0e443e7d03abda05edf304fdb4329a736bc21861e8cca92e65895b68ef00Create Pair71732112021-05-06 1:41:03168 days 23 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.00994091
0x1c22f559becc371ee439acaded45222df552ba9c897235014ade9b16bda902b2Set Fee To71195702021-05-04 4:15:47170 days 20 hrs agoPantherSwap: Deployer IN  PantherSwap: Factory0 BNB0.000217495
0x6b05d9bb0e162a6fe4c9d7619d3a24d6b823e885958f9e86193f3afbf141dff00x6080604071193522021-05-04 4:04:53170 days 20 hrs agoPantherSwap: Deployer IN  Contract Creation0 BNB0.012044715
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OVERVIEW

This the factory contract of PantherSwap AMM exchange.

Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xbb71c20b78da52e701399efc0715b8a3da77341a3275935c6d038475e133e064117303122021-10-13 7:03:528 days 17 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x92227a91d3a1f69eef6877bc28f5377114db0450082418a064d784abdf29336d117188202021-10-12 21:27:529 days 3 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x3de215e3285dcb2176f15b170ec2b79c947f57c34fb41c2c0db2c626f3edf328115138742021-10-05 17:32:4316 days 7 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x749c9dcbcf0e1bd5bdac1110c17b24889822fdaf31e1d438dfd1e6ea557e2fb3113110812021-09-28 15:16:3423 days 9 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x030ba08120cf541a7ac52dd7d500c733009c1535d78463554828333ce6e110ba112664432021-09-27 1:37:4424 days 23 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x279c906d76bb41a0fc2a01edc4b5629d959572cd4e42b16261e593826cf1d1b9109384762021-09-15 14:58:2236 days 9 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xfb11af6b5c3ae3a4e44413a4fba25078466658e5e1051a8a78c10d2d5f66b288105292202021-09-01 7:01:1850 days 17 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xb6a69b8bc50874432dccb0ad04d30c9842c2549fe2014061c089cbb8b848dfdf105233462021-09-01 2:02:0950 days 22 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x4ae9f49be29f28e1382f7396eaca2b2fa2f08c1a01effd163b9110f9d90324b1104960272021-08-31 2:53:5451 days 21 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x29a6b59f1fac6ab1af4d408103cb1a6df44f7a51a61edfd86edc35f069200810103602912021-08-26 8:01:0756 days 16 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x567c7e3af12a2b368961c1a704f9cc9dc283bafbed2c557a2bd24df57355507f102834822021-08-23 15:41:5759 days 9 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xbd58ba88ed5b22ce9a8fc578fa86efd07cda28cde33521cfec939ebd0bb6a1ef101863722021-08-20 6:12:4162 days 18 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xb3647699e3e7ac91b196d4b2484dae14ecb6085bd8bf627e4e501333fef9665f101436572021-08-18 18:22:4464 days 6 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xd86be4ab554a5f75f90798933aecfa63634366d6e271a3823b64a6c30987250d98296892021-08-07 16:44:4675 days 8 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x409d6e1ec55db50d22f8155a5d265baee90ec869cda7079d0c8e0156b7df996696660332021-08-01 19:15:1281 days 5 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xa67656b4bad983445a907a72b324c45e76e75e40694ced95ded8f1c35f52c11b96208262021-07-31 4:18:3482 days 20 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x8d7891f807ba3624611ba8473bc9c7823e5c557dd8f5bba0525cedfc9c9a219194009782021-07-23 6:20:3190 days 18 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xc7a4855a2d9db0a2bc6929e46a34b55e5ec0b257dd9dbe80ef5e5d95c138fb7f93519422021-07-21 13:27:2592 days 11 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xf8d3c1b376e7ac8e0385ef18dbf47c5937f89affa1a504079c9fbf0efa55a16692855342021-07-19 6:04:5494 days 18 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xf7fe3eee0f247edbd2b3dce7d8bbf0da2bcabee38ba2b18c5cfed43b6d26439192635342021-07-18 11:44:0695 days 13 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x0ce2ab8254d1acb02f7fedfaca03d731c95a2e4c386fdbea484cf7397e14388b91401222021-07-14 4:50:0999 days 20 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0x4ca1893b884c02ee427a851c3706fae39c50e4ec8cb00a79e2bf7d88f27ebc0890573982021-07-11 7:53:39102 days 16 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xe8ece0e2eef9bd796c0f05d533b41abf2aa5d68ad283f9a4166a339fc3657d2b90571632021-07-11 7:41:54102 days 17 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xf572697908b44aa7d6154e28db867856eee03004803d73d3cf66b4b4dff2580a90449692021-07-10 21:32:12103 days 3 hrs ago PantherSwap: Factory  Contract Creation0 BNB
0xedbebd5d851b4f684909b6807b4a47c9cafd5dc1972011e421e1bf81a2fa75c790449492021-07-10 21:31:12103 days 3 hrs ago PantherSwap: Factory  Contract Creation0 BNB
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Contract Source Code Verified (Exact Match)

Contract Name:
PantherFactory

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 50 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at BscScan.com on 2021-05-04
*/

pragma solidity =0.5.16;


interface IPantherFactory {
    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;
}

interface IPantherPair {
    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;
}

interface IPantherERC20 {
    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;
}

// 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');
    }
}

contract PantherERC20 is IPantherERC20 {
    using SafeMath for uint;

    string public constant name = 'PantherSwap LPs';
    string public constant symbol = 'PANTHER-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, 'Panther: 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, 'Panther: INVALID_SIGNATURE');
        _approve(owner, spender, value);
    }
}

// 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;
        }
    }
}

// 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);
    }
}

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);
}

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

contract PantherPair is IPantherPair, PantherERC20 {
    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, 'Panther: 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))), 'Panther: 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, 'Panther: 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), 'Panther: 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 = IPantherFactory(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(3).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, 'Panther: 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, 'Panther: 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, 'Panther: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Panther: 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, 'Panther: 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) IPantherCallee(to).pantherCall(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, 'Panther: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
        uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(2));
        uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(2));
        require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'Panther: 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);
    }
}

contract PantherFactory is IPantherFactory {
    bytes32 public constant INIT_CODE_PAIR_HASH = keccak256(abi.encodePacked(type(PantherPair).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, 'Panther: IDENTICAL_ADDRESSES');
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'Panther: ZERO_ADDRESS');
        require(getPair[token0][token1] == address(0), 'Panther: PAIR_EXISTS'); // single check is sufficient
        bytes memory bytecode = type(PantherPair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        IPantherPair(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, 'Panther: FORBIDDEN');
        feeTo = _feeTo;
    }

    function setFeeToSetter(address _feeToSetter) external {
        require(msg.sender == feeToSetter, 'Panther: 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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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000fb58d737942e1c39f713203c323e95afb12361ab

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0xfb58d737942e1c39f713203c323e95afb12361ab

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000fb58d737942e1c39f713203c323e95afb12361ab


Deployed ByteCode Sourcemap

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Swarm Source

bzzr://fde90900151bfd2d75f80c4a031e8fea426cc1b26ab06d6c438eed8800ef0748
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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