Contract 0xefa94DE7a4656D787667C749f7E1223D71E9FD88 3

Contract Overview

Pangolin: Factory
Balance:
0 AVAX

AVAX Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x7f242c3e400c9d86d02c56886098bda80cccf5ae61b190d8051a86c28f0eef89Create Pair151394272022-05-25 2:10:4732 days 17 hrs ago0xecca093b6629fc55878ad58925e152077deb6f06 IN  Pangolin: Factory0 AVAX0.084243874 26
0xffd4ffa50efe37c41b49684dd804b69a4e2158f5786adb4e8971cbc9506c0213Create Pair151394122022-05-25 2:10:1732 days 17 hrs ago0xecca093b6629fc55878ad58925e152077deb6f06 IN  Pangolin: Factory0 AVAX0.084244134 26
0x4fdf6f632d7b39bc51fd856568d1dcb54158e146fb50ba404d3db20fa9def57cCreate Pair151393722022-05-25 2:08:5832 days 17 hrs ago0xecca093b6629fc55878ad58925e152077deb6f06 IN  Pangolin: Factory0 AVAX0.084244134 26
0xad243ff3af69f87ca2e4708218daa90f4b8c5471b98b3eb7c73ccba9ffc77254Create Pair151393562022-05-25 2:08:2632 days 17 hrs ago0xecca093b6629fc55878ad58925e152077deb6f06 IN  Pangolin: Factory0 AVAX0.084243874 26
0xede64684a37e138f940de07452ac00f7471b8a5a32fced2def7b3ae320359d28Create Pair151393152022-05-25 2:07:0232 days 17 hrs ago0xecca093b6629fc55878ad58925e152077deb6f06 IN  Pangolin: Factory0 AVAX0.084244134 26
0xb650ec303215b159e56150c3b64253172997d7c34f10b96cffe6714cd8159789Create Pair151392992022-05-25 2:06:3132 days 17 hrs ago0xecca093b6629fc55878ad58925e152077deb6f06 IN  Pangolin: Factory0 AVAX0.084244134 26
0xf766c433ed8a540de6d0049d301b2f6172622556b504007b13ea16f92b3b347cCreate Pair150980322022-05-24 3:01:0233 days 16 hrs ago0xa483e093a0ca7dd9fe4e2c8ff8d8891b0c484116 IN  Pangolin: Factory0 AVAX0.08100342525
0x3f821cc5f3f6594bde306848df2dc465b8b6a0d6eb886b4351d470bce352b596Create Pair150979872022-05-24 2:59:3233 days 16 hrs ago0xa483e093a0ca7dd9fe4e2c8ff8d8891b0c484116 IN  Pangolin: Factory0 AVAX0.08100372525
0x68a860793573e3093d824d47eb307acb07dfd3cc142b7df3dcb6ad331eb6ebafCreate Pair150927592022-05-24 0:03:3633 days 19 hrs ago0x387891491a5df45bbff22de502b066ec3ba0cf52 IN  Pangolin: Factory0 AVAX0.084244134 26
0x09c455c38c0c2b8a4231609504d2dbde772d88e079ab4902423160e67d1543b6Create Pair150927502022-05-24 0:03:2133 days 19 hrs ago0x387891491a5df45bbff22de502b066ec3ba0cf52 IN  Pangolin: Factory0 AVAX0.084244134 26
0x8da46d8ffd953bc6ff30125c577821763c248883d826125001b005e011ab344aCreate Pair150927422022-05-24 0:03:0333 days 19 hrs ago0x387891491a5df45bbff22de502b066ec3ba0cf52 IN  Pangolin: Factory0 AVAX0.084243874 26
0x91b9d5da7a08a62bb28e946029ce5cd27f327fb950ebb5715a96ce3197c74221Create Pair148099792022-05-17 10:21:0640 days 9 hrs ago0xbdbe68b02c2afeb48247b15756033bb8e617d2e9 IN  Pangolin: Factory0 AVAX0.081003725 25
0x4089091ebf406ce94a93994000403b4989c43f2548038ee3b46326e2bc9819b6Create Pair148099712022-05-17 10:20:5040 days 9 hrs ago0xbdbe68b02c2afeb48247b15756033bb8e617d2e9 IN  Pangolin: Factory0 AVAX0.081003975 25
0x69d419af2802150809985f59de2eb10906e702e4b74c80bca84767f23d0f84b3Create Pair148099632022-05-17 10:20:3340 days 9 hrs ago0xbdbe68b02c2afeb48247b15756033bb8e617d2e9 IN  Pangolin: Factory0 AVAX0.081003725 25
0xc8e070877349c48a9a871c9c897cdeaf56072559a1848e72373017ad75276004Create Pair146964382022-05-14 19:11:5943 days 17 mins ago0x29ca68110868637151d1ebefabf51f5096fa0746 IN  Pangolin: Factory0 AVAX0.081003725 25
0x7bb5a903aabbf9c161f202fad76d9aa705626ae2f61ceb8fc48e0599e8496ba1Create Pair146964322022-05-14 19:11:4443 days 17 mins ago0x29ca68110868637151d1ebefabf51f5096fa0746 IN  Pangolin: Factory0 AVAX0.081003975 25
0x8761f0dd41f2952159fd5cb1b60aafb1500125adf5739e4ffcf22dacacb5f5fbCreate Pair146964262022-05-14 19:11:3143 days 18 mins ago0x29ca68110868637151d1ebefabf51f5096fa0746 IN  Pangolin: Factory0 AVAX0.081003975 25
0x963b7041173d7524d813b96bccb404cf6e3f8406a9599bc5980760ae01589902Create Pair119003052022-03-09 18:53:08109 days 36 mins ago0x81f0796f683c2e45ac128fdf3c47a1319871f0b4 IN  Pangolin: Factory0 AVAX0.183957077103 56.774264734
0x84d04be729f825733d3bb154e233010475e16096833b5235074f96100e1e70c6Create Pair116004942022-03-02 19:14:31116 days 15 mins ago0x678c865beeb826224c3a24afcce7f5ee61a77975 IN  Pangolin: Factory0 AVAX0.250063694529 77.176365274
0x28d62d23e16c7e3f8464de6df947b8be1ff7bade8e126d9d9105da188eb3b19eCreate Pair112468632022-02-22 10:40:00124 days 8 hrs ago0x000000003af6916de52d3425b4e49d7f97edebee IN  Pangolin: Factory0 AVAX0.0810149665 25.003392272
0xb9abb3439b807cbfe17dff756812a82a78d20ed9b8ac1169d3f68964480e4bc0Create Pair112461722022-02-22 10:16:38124 days 9 hrs ago0x000000003af6916de52d3425b4e49d7f97edebee IN  Pangolin: Factory0 AVAX0.084357521928 26.034994557
0x2c0fff6a6bb623ffed3a979aefd0f007e68042a2a7a7b1c949867ebb800607afCreate Pair107416592022-02-10 15:37:27136 days 3 hrs ago0xc7fce65ed5f833cd4554f307072160b576feb7ec IN  Pangolin: Factory0 AVAX0.205194984632 63.328873034
0xb1d5bd7a036bd76c2b346cb8787f8585638b8bc96aa110509b40b5cbe176cb15Create Pair104450572022-02-03 20:14:55142 days 23 hrs ago0x56f0b015aa4df2ad039b3dfa7675db365000c73a IN  Pangolin: Factory0 AVAX0.082198337472 25.368690598
0x2e33c4ac20aa3106845e780b96969a5ef8f5ed8bfb1b2f221f21de951486dd75Create Pair103109762022-01-31 19:03:49146 days 25 mins agoSwapXI: Deployer IN  Pangolin: Factory0 AVAX0.299508481501 92.436353124
0x5b76c18837bb1834bd41be42a6e3c682b5c4d9b9036177b1507a266f9406ecacCreate Pair102739272022-01-30 22:19:55146 days 21 hrs ago0xecdd733467e017ad4a055f243ab397520857363b IN  Pangolin: Factory0 AVAX0.195816288258 60.434346772
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x65cb82f135f44debcddcd984076c34e2f12bacc0ae7de93dda25aa9e2d26c0f5165053092022-06-25 16:17:151 day 3 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x9416e083f78c687111028a1019084abd7b19d1939fc386791c13079d4ccd0a76164771512022-06-25 0:37:451 day 18 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x7501a8df2b4134c6ca24cbfa7b77d3005012024846e563c280deecde353e3a1a164042582022-06-23 8:12:183 days 11 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0xbc94cad78e445e539744f6a66078e34f8adec3c4eeac32a95d96deab87d87c70163398802022-06-21 20:26:174 days 23 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0xfcc4a2d0fe360a9451fad1e78cc8fc778273359392f1caf65d5d4e97a45460fe163009562022-06-20 22:47:065 days 20 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x4fcfda5cdefde04a8d23a7a5e4bf7f08ee380cc02d59d956f657f3dc1512fc16162044322022-06-18 17:32:518 days 1 hr ago Pangolin: Factory  Contract Creation0 AVAX
0x8c88353e2e0d48633f75274d7b498aef5dc093df8d086b20e5b4f6579ed65ace161898902022-06-18 9:27:288 days 10 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x68c406aee9190e362788a8b37a0af48b148514cf12a3803a9dff13f73a34a464160156222022-06-14 9:29:3612 days 9 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x45e0b0b03a6021047849119af886e267e9fd6eba6c8aac6cc55c4eb48f680185158408442022-06-10 9:37:0616 days 9 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0xa0760d74c31e318d2e28d9a6ac06e46899085e9ae07f6c00b647b7645e9216ff158291672022-06-10 3:04:1616 days 16 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x7f59dbfb0ae2c57710e517b6beb460fb6e47c4608a787b9535066899d9759bf9158062142022-06-09 14:15:1217 days 5 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0xd774a07144e70a7237d90220541e87c038958b05a0b17de2fae6c49ee4a94db5157984652022-06-09 9:55:4217 days 9 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x828bcdd6d55b3cc960e30e3d96bfb26cec33d7c35f97cd1dc9c4bbd3b15d9177157017322022-06-07 4:00:0719 days 15 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x268c4d127db712c1d86b90dcb9a099858abc90d44c4b0dde154bc63fe0070450156084312022-06-04 23:30:2721 days 19 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x16833d27ab0ecdba3b0689dd65cb6c4c299bfdda34c8fe0096493fd32a1686a7155918792022-06-04 14:16:3822 days 5 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x210f4ddbbaaf0d1811a7f16ba747d7389f36b9e705ccf685640356b950136f17155870372022-06-04 11:34:4622 days 7 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x8e22ce3a69be673d5b20fb06af71c7a7d283befaa11dcd9a1677426fa7d77040155134282022-06-02 18:29:5424 days 59 mins ago Pangolin: Factory  Contract Creation0 AVAX
0xf5e1f62a1b5a87df53d4ccd08e68c0dd805300186f5d6b31fb2f7a7089b25c53154240072022-05-31 16:41:0926 days 2 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x87bab8049d612a520c4e30b48e39836179d70214d3f34fded404978f772efa13154163862022-05-31 12:29:2726 days 7 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x5db8d904b380ec59d8003ff4b4b04a5c8275fcdcbf30ee2eee74c41ce0273bcc154130352022-05-31 10:37:3526 days 8 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0x813b947649933c7c5fc226a4b75547224c86f18e6cff530223672bc2ba80fc8b153922712022-05-30 23:04:4426 days 20 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0xd8b5cea03fcaabf7c12c3a8353fbb285da7c3f59bac73c757402ac45d410bb62153691852022-05-30 10:11:2127 days 9 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0xdfc90abe807b2ae2559f253acc529c4bda5f1c57870744d4a184b688c795c667153045492022-05-28 22:05:3528 days 21 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0xaee916608fc62f47ab03bb712fdd3579d35b6e9a4ac25a4191c9101ebfaef708153039082022-05-28 21:43:4428 days 21 hrs ago Pangolin: Factory  Contract Creation0 AVAX
0xffe034076c4ba09c5b077fd8fbeeb082c07467ef108e326eb4791b700293c04c153038422022-05-28 21:41:3928 days 21 hrs ago Pangolin: Factory  Contract Creation0 AVAX
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Contract Source Code Verified (Exact Match)

Contract Name:
PangolinFactory

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 snowtrace.io on 2021-11-02
*/

// Sources flattened with hardhat v2.0.6 https://hardhat.org

// File contracts/pangolin-core/interfaces/IPangolinFactory.sol

pragma solidity >=0.5.0;

interface IPangolinFactory {
    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/pangolin-core/interfaces/IPangolinPair.sol

pragma solidity >=0.5.0;

interface IPangolinPair {
    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/pangolin-core/interfaces/IPangolinERC20.sol

pragma solidity >=0.5.0;

interface IPangolinERC20 {
    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/pangolin-core/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/pangolin-core/PangolinERC20.sol

pragma solidity =0.5.16;


contract PangolinERC20 is IPangolinERC20 {
    using SafeMath for uint;

    string public constant name = 'Pangolin Liquidity';
    string public constant symbol = 'PGL';
    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, 'Pangolin: 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, 'Pangolin: INVALID_SIGNATURE');
        _approve(owner, spender, value);
    }
}


// File contracts/pangolin-core/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/pangolin-core/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/pangolin-core/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/pangolin-core/interfaces/IPangolinCallee.sol

pragma solidity >=0.5.0;

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


// File contracts/pangolin-core/PangolinPair.sol

pragma solidity =0.5.16;







contract PangolinPair is IPangolinPair, PangolinERC20 {
    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, 'Pangolin: 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))), 'Pangolin: 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, 'Pangolin: 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), 'Pangolin: 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 = IPangolinFactory(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, 'Pangolin: 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, 'Pangolin: 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, 'Pangolin: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Pangolin: 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, 'Pangolin: 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) IPangolinCallee(to).pangolinCall(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, 'Pangolin: 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), 'Pangolin: 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/pangolin-core/PangolinFactory.sol

pragma solidity =0.5.16;


contract PangolinFactory is IPangolinFactory {
    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, 'Pangolin: IDENTICAL_ADDRESSES');
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'Pangolin: ZERO_ADDRESS');
        require(getPair[token0][token1] == address(0), 'Pangolin: PAIR_EXISTS'); // single check is sufficient
        bytes memory bytecode = type(PangolinPair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        IPangolinPair(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, 'Pangolin: FORBIDDEN');
        feeTo = _feeTo;
    }

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

Contract ABI

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

000000000000000000000000808ce8dec9e10bed8d0892aceef9f1b8ec2f52bd

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0x808ce8dec9e10bed8d0892aceef9f1b8ec2f52bd

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000808ce8dec9e10bed8d0892aceef9f1b8ec2f52bd


Deployed ByteCode Sourcemap

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Swarm Source

bzzr://e2fe0e239afd6cd3298015038f33deee2f2ee9aed4c2f02d5d326f2879613e1f
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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