Contract 0xcA143Ce32Fe78f1f7019d7d551a6402fC5350c73 2

 

Contract Overview

PancakeSwap: Factory v2
Balance:
0 BNB

BNB Value:
$0.00

Token:
 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x6944f36c4680ef30c6c47da0e1a129babdceb7f0764641a4250707a76bc0ce8eCreate Pair119639172021-10-21 11:43:216 hrs 3 mins ago0xb4f9afe6df79823dcb35653ddda8200f25ba4d7c IN  PancakeSwap: Factory v20 BNB0.016196465
0x32111358d7fb220f70445c18f389aac8c6c6fedbed1a6691c8f8c4d4aa834507Create Pair119634402021-10-21 11:19:036 hrs 27 mins ago0xb4f9afe6df79823dcb35653ddda8200f25ba4d7c IN  PancakeSwap: Factory v20 BNB0.016196465
0xd2c2f4124ce17336517c52dd348b13c87a7e691f27352acc4886fe53c439cc28Create Pair119571212021-10-21 5:58:2711 hrs 48 mins ago0x049a203ac85b2bca08dfc12841162cc4beed42d9 IN  PancakeSwap: Factory v20 BNB0.016196465
0x92395c4c62fc8dfc62f720524a1935c730b008cf7f589d9539feffd18f35d6c3Create Pair119562762021-10-21 5:16:1212 hrs 30 mins ago0x049a203ac85b2bca08dfc12841162cc4beed42d9 IN  PancakeSwap: Factory v20 BNB0.016196515
0x9e3084b1b1317852837357c0bc95be6eef9dd59e668220d0ea4ae6cdefaf1bd3Create Pair119562332021-10-21 5:14:0312 hrs 32 mins ago0x049a203ac85b2bca08dfc12841162cc4beed42d9 IN  PancakeSwap: Factory v20 BNB0.016196515
0x4dfc08c9f1179085365416cbddb28cdac61793a5a3248a446c6319f54f0ab5fbTransfer From119504662021-10-21 0:17:4517 hrs 29 mins ago0x5e87f14b68637f4f7e516c1b4e31c9a0bc8e1f30 IN  PancakeSwap: Factory v20 BNB0.010775245
0x488ca62c2038db623186d6e7df186df5fc23516bcc99510b0bb08eac03a75fe1Create Pair119418442021-10-20 17:02:081 day 44 mins agoRobust Protocol: Deployer IN  PancakeSwap: Factory v20 BNB0.016196515
0xd9d3c47209c51ad697afae8097557f65ff347f6567106607a1fc9c21a956d43eCreate Pair119417862021-10-20 16:59:141 day 47 mins agoRobust Protocol: Deployer IN  PancakeSwap: Factory v20 BNB0.016196515
0xd4196a347bd739e2d2a25acc3cd06855255d6cab77c0dce337e6a6589ceda8ecCreate Pair119395422021-10-20 15:06:361 day 2 hrs ago0x4079df03f9c5e41a2819a389fed92c2d0e1c1a5f IN  PancakeSwap: Factory v20 BNB0.016196465
0xe3e997f906012b6e290ac20e59363f01700da9b1978fc46f3a480f3d4397d1b7Create Pair119341172021-10-20 10:34:531 day 7 hrs agoRobust Protocol: Deployer IN  PancakeSwap: Factory v20 BNB0.016196515
0xf22038dbf144e286912f42f09d28032fcebd2f9f355ad2f7ca5b91689fd16e2fCreate Pair119341032021-10-20 10:34:111 day 7 hrs agoRobust Protocol: Deployer IN  PancakeSwap: Factory v20 BNB0.016196515
0x5dbf377c05cfd5b8c491687bf9b12b9f00f3a9ac0d32357043ba5402412532aeCreate Pair119322882021-10-20 9:02:191 day 8 hrs ago0xde6339a99f8e40dc7f6b5ef6b923c3ddc771830a IN  PancakeSwap: Factory v20 BNB0.016196515
0x649fe745f4e5439fff6b38ddd651b5f5d3a37f56a4bfbadbfd03c52bd1241f0bCreate Pair119265972021-10-20 4:15:171 day 13 hrs ago0xfe7fe72b189059df2a817c3bb78cb55dac363a45 IN  PancakeSwap: Factory v20 BNB0.016196405
0x1fd487cbd3f786854259dd0af2f95ed30210a6619b6343fee40fcd6e0e60919aCreate Pair119196152021-10-19 22:23:211 day 19 hrs ago0x2fcb8eeb7993bcc881e831205f522b72af5410f7 IN  PancakeSwap: Factory v20 BNB0.016196465
0xb25363239c7b614e09fdb9f3f746344fcc58d9aba19f7fc5e9b21f5de5167e63Lock Tokens119125532021-10-19 16:02:032 days 1 hr ago0xca2f66e7106fac53d6bcb162de1c2810ff00bd21 IN  PancakeSwap: Factory v20 BNB0.000111045
0x5a4f407d318fcb2dcafd7ef5a7609ff5c7aa7a9f7c5ac63e358dde437b9c1071Lock Tokens119124912021-10-19 15:58:572 days 1 hr ago0xca2f66e7106fac53d6bcb162de1c2810ff00bd21 IN  PancakeSwap: Factory v20 BNB0.000111045
0xa911a4d98569d3f0eff86f5bdcf273fe897715ba7fcd7c1c4a3bbf8b808bbb8cCreate Pair119076062021-10-19 11:50:592 days 5 hrs ago0xb4f9afe6df79823dcb35653ddda8200f25ba4d7c IN  PancakeSwap: Factory v20 BNB0.016196515
0xb8de25d9b76e75cfa4c00cebf40400439217257b2d5092607e08b3d1f2346a17Create Pair118975252021-10-19 3:26:412 days 14 hrs agoSave Planet Earth: Deployer IN  PancakeSwap: Factory v20 BNB0.016196515
0x836f12dc91c81cd8013ff97329b990eadec3fb25a503bb45750da4e58834f421Create Pair118868372021-10-18 18:30:112 days 23 hrs ago0x77bbf36f1a6e6c9e1c0fddc7048df57083405f1d IN  PancakeSwap: Factory v20 BNB0.016196515
0xee2128b0658a2249f7371ff8c49f64ab4d547a71b9d7cf869ca8b1a7b22aeff2Create Pair118867972021-10-18 18:28:112 days 23 hrs ago0x77bbf36f1a6e6c9e1c0fddc7048df57083405f1d IN  PancakeSwap: Factory v20 BNB0.016196455
0x8fc8f7ee31f48539494aecc62d25c17aed25e18b878da0104d0bc3ea785c60d0Create Pair118867652021-10-18 18:26:352 days 23 hrs ago0x77bbf36f1a6e6c9e1c0fddc7048df57083405f1d IN  PancakeSwap: Factory v20 BNB0.016196515
0x5cc46c9f8ecaea2334447b080967815ee7d41a0b11bd2762ad2feceafc4e3d89Create Pair118867402021-10-18 18:25:202 days 23 hrs ago0x77bbf36f1a6e6c9e1c0fddc7048df57083405f1d IN  PancakeSwap: Factory v20 BNB0.016196515
0x87ed37ec2f5399ac42cf6a253569a6f8c168cb880a2a66e70fda71b077d87f13Create Pair118866832021-10-18 18:22:262 days 23 hrs ago0xb6951f9f1ac84b565999d8562be64e1ae15025d5 IN  PancakeSwap: Factory v20 BNB0.016196515
0xdcd83159f8debfa12eba9f50c0fe8813063cfa854f5019e039f9a1a32cc7beaeCreate Pair118865772021-10-18 18:16:532 days 23 hrs ago0xb6951f9f1ac84b565999d8562be64e1ae15025d5 IN  PancakeSwap: Factory v20 BNB0.016196515
0xfb60b2e7da70c808b3087cad7090d1dd45c43df019833f56625861e352f23920Create Pair118861732021-10-18 17:56:382 days 23 hrs ago0xf32b2941be48a4753612af24d0393b3dcf447a25 IN  PancakeSwap: Factory v20 BNB0.016196515
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x2b790204420489ab52a81c627b7b793178707be4d1ca17446bf244539b90e75d119708812021-10-21 17:46:1646 secs ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x8e8b1bb9fc5f33d62fae9e90dd95504ebc1c52606db8467341ba0e11e4ba236b119708592021-10-21 17:45:101 min ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x1744f5ede44f783ac688b566b704ef98e77d850cb1209f9b75ccf6a800ada22e119708472021-10-21 17:44:342 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x690908b2c3b812e1753fba81328241fd4c247da9662b0f3ee1f8b620e50574e6119708402021-10-21 17:44:132 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x0ff0cf8aacdec368ae751e84ff1d4db05809eaf579ca6e59e3905d3783a105bc119708392021-10-21 17:44:102 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0xc719da67983e339c222c974ab9c59c5c74c8d9a8ad04eb82ae4ac2332780feb2119708252021-10-21 17:43:283 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0xe62b77fa7d1c4f35c7a784a2a7cdf65e2fb0bdb17ae737187825a596ad486dcb119708252021-10-21 17:43:283 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x840aaa91933597cadf3645fc86fa9a3c26034472b31a841050de8b42b125037c119708232021-10-21 17:43:223 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0xe426e38d455852d4b85f4709fb6b3cc676820a8d274865e5d8ffaf2672833924119708212021-10-21 17:43:163 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0xe14199824d143f9c16e6c4cefc918195e47f7a32b4e7aca26fd49662de582603119708112021-10-21 17:42:464 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x45971104507d153a4c095f8d75b86a9b64753b176e7e1841a2eda725ae2b18ac119707932021-10-21 17:41:525 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x2e2301750d1f6b67b3efa18d4274e3f69a19b27f0ab82e189be0ee599e9d7b19119707782021-10-21 17:41:075 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x3955d09b157afd7ae6d7f51930dce6256a55a679e20d1acf8eb36abd97b99906119707722021-10-21 17:40:496 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x6b62efcd2404391df8f4f7fc8eba6a70fa062351086c04c277ab0a7a0ffee213119707662021-10-21 17:40:316 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x5871d2dd8da4605f9aa793867dde723634011faec0ee19914b3f57e32c99ab8d119707522021-10-21 17:39:497 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x51428b361063f0aebae2cbff6516f0f5e4d5bf75a37ac5c65d26a0533f1b236d119707342021-10-21 17:38:558 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x777f0bbc86281656b4dca58a057e3ef4cc76801abc48f7cf572f0837f5cefd54119707342021-10-21 17:38:558 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x4b0cdf5c99555e2834bf93e59acf231e2394c8fd0aaab505d6113de83c4e37cc119707302021-10-21 17:38:438 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x0d79fc5890f1140a3c9b488412be1e896da62dd2409f270d6164ad4c9c2e1621119707222021-10-21 17:38:198 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0xa980e429fe68821a277efc923f8b93defd016b4d53a940b9030051240e953b33119707192021-10-21 17:38:108 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x516ab5aede2d7c44b5d2b140fd03a477d00414a993c38b8b8ec333b192a7c501119707102021-10-21 17:37:429 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0xf8570b682d19ae3e9f635834b5a1488694a89edce648291273949cd9741196ae119707102021-10-21 17:37:429 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0xea0833494c74a3dd1673c1ed12dbe3a363bb66794de3742b1c1794b3c31248f3119707102021-10-21 17:37:429 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0x451d40439912db5b5f2e9419f551ec4c2b9c11a76afa34a91eb17b7add0f8886119707022021-10-21 17:37:139 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
0xc076017f2be7f79b7e7986c6a72f3f8245f2187e40d61d54b630c5d7a3ae013c119706992021-10-21 17:37:049 mins ago PancakeSwap: Factory v2  Contract Creation0 BNB
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Contract Source Code Verified (Exact Match)

Contract Name:
PancakeFactory

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at BscScan.com on 2021-04-23
*/

/**
 *Submitted for verification at BscScan.com on 2021-04-22
*/

/**
 *Submitted for verification at BscScan.com on 2021-04-22
*/

/**
 *Submitted for verification at BscScan.com on 2020-09-19
*/

pragma solidity =0.5.16;


interface IPancakeFactory {
    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 IPancakePair {
    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 IPancakeERC20 {
    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 PancakeERC20 is IPancakeERC20 {
    using SafeMath for uint;

    string public constant name = 'Pancake LPs';
    string public constant symbol = 'Cake-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, 'Pancake: 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, 'Pancake: 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 IPancakeCallee {
    function pancakeCall(address sender, uint amount0, uint amount1, bytes calldata data) external;
}

contract PancakePair is IPancakePair, PancakeERC20 {
    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, 'Pancake: 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))), 'Pancake: 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, 'Pancake: 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), 'Pancake: 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 8/25 of the growth in sqrt(k)
    function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
        address feeTo = IPancakeFactory(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)).mul(8);
                    uint denominator = rootK.mul(17).add(rootKLast.mul(8));
                    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, 'Pancake: 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, 'Pancake: 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, 'Pancake: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Pancake: 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, 'Pancake: 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) IPancakeCallee(to).pancakeCall(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, 'Pancake: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
        uint balance0Adjusted = (balance0.mul(10000).sub(amount0In.mul(25)));
        uint balance1Adjusted = (balance1.mul(10000).sub(amount1In.mul(25)));
        require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(10000**2), 'Pancake: 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 PancakeFactory is IPancakeFactory {
    bytes32 public constant INIT_CODE_PAIR_HASH = keccak256(abi.encodePacked(type(PancakePair).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, 'Pancake: IDENTICAL_ADDRESSES');
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'Pancake: ZERO_ADDRESS');
        require(getPair[token0][token1] == address(0), 'Pancake: PAIR_EXISTS'); // single check is sufficient
        bytes memory bytecode = type(PancakePair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        IPancakePair(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, 'Pancake: FORBIDDEN');
        feeTo = _feeTo;
    }

    function setFeeToSetter(address _feeToSetter) external {
        require(msg.sender == feeToSetter, 'Pancake: 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)

000000000000000000000000412febf6be0ca21209cab443143f01c7131c10f8

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0x412febf6be0ca21209cab443143f01c7131c10f8

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000412febf6be0ca21209cab443143f01c7131c10f8


Deployed ByteCode Sourcemap

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Swarm Source

bzzr://f76c3b8a4bccf872a2f2c0f7d990b026f08e040438236ffabbb95cb063b976f5
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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