Contract 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5

 
 
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x18d6718ca4196e38534995bd98e2bfc06f901cef3eb451ec8a32f53330755b60Create Pair349390082022-10-29 8:47:0935 days 10 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.860294496148 406.038316966
0x6d58acb394ce4fb80f9d2dd74abc130c914efcd29afae9a7cf2ff280ac140910Create Pair349386162022-10-29 8:33:3735 days 10 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.989817416348 467.172666938
0xa3ac6a8467ec509baeed3b84c82c039ab95d006ef5f2e3f4bd20c20591624d65Create Pair349150252022-10-28 18:53:3636 days 30 mins ago0x951fbc44ae7fa0527662757da735d02c6d9702f7 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.132693590959 62.628479994
0xd67abf5adede3ee2a1725bb5fc05b3db9c8196e1014982b87fb30c7ad23903c3Create Pair348582462022-10-27 9:50:3437 days 9 hrs ago0x01f80523429e64c1ff320f38a8e5f4a7c717ccd8 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.992279895002 468.337114688
0xac5f3b68cbbb37874c0a4ec70916596f302b72796b92b1b5ea92e6be871ad3ecCreate Pair346389672022-10-22 0:50:0142 days 18 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.05937 500
0x381370309bfa639fe17cbe47a94b67ef51dda27242a71cc90eabf1084e93378dCreate Pair346140192022-10-21 10:08:4143 days 9 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059359 500
0x2d04c5894b9a5ea9a9ad9e4ff7285bd185596f33ddc7f5112533f52413e32f73Create Pair346138482022-10-21 10:02:4743 days 9 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059365 500
0x2e7b2b48d2067fafdc8665a6e5eb55abeba845b9a020f9cd22cc46c71c471c24Create Pair346136872022-10-21 9:57:1243 days 9 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059365 500
0xaa46b843682a8379bcc7d79348babbd7ac02fab5cbea4cfe0b662ab0efb983f2Create Pair346132722022-10-21 9:42:5843 days 9 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059365 500
0xe565a83fdf21389644dd6aa8bb522c642a010ac61bde210365eeabecbf8d14e6Create Pair343558232022-10-15 1:22:1649 days 18 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059376 500
0xa25947b58015e4a14e9eb3504cb20732c7f49501b1f0c843e1c7535bca134319Create Pair343557422022-10-15 1:19:3049 days 18 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059376 500
0xf0bfa4af5d073e21c00d4a5c447c3530f1efccec6abe37f76ab82c0290932b33Create Pair343554682022-10-15 1:10:0349 days 18 hrs ago0x01f80523429e64c1ff320f38a8e5f4a7c717ccd8 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.529688 250
0x8548f5e35eee6927c63418c49c08e91b3c918f2839222a602baed5ba2bc15564Create Pair342869552022-10-13 9:18:4851 days 10 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.276845740306 130.665272901
0x02fef34f9240878499d55d5ef7c14dab5a25536316006f9cfcfd964e59480bf9Create Pair340257142022-10-07 1:40:3557 days 17 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.529688 250
0x733cc8b0355f3555878a55628087a0b36898c9cc3263b16d07451975eaeb88e0Create Pair340257112022-10-07 1:40:2957 days 17 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.529688 250
0x1a1b666f81fbbe0b88e5f2777a4f81451ea5f089962d2c42be6901188635194eCreate Pair337488962022-09-30 9:28:0964 days 9 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.529685 250
0x066553ccafdb3262218fa69f552ef9957304c3afbb5b2c2d4acdf81b00f0509dCreate Pair337488932022-09-30 9:28:0364 days 9 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC0.529688 250
0x5e3db215f0af2e69eafa0ed11cd2bdd39c58c58121f910c8ad31e063a4b96838Create Pair337484392022-09-30 9:12:2764 days 10 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059376 500
0xb395738c78db3b5ae666d4340b66dc853524268e003b4603abfa79b9ba6b563bCreate Pair337484362022-09-30 9:12:2164 days 10 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059376 500
0xd2b254f691e0579c003291d1d54c370e5445c85c5d4a9cb72652606788f7521dCreate Pair337346862022-09-30 1:10:1264 days 18 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059376 500
0x6d380a7079994f791e565b514b99d55e4f81b147a8eaa76b9209bd7a7851bbd5Create Pair337346822022-09-30 1:10:0464 days 18 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059371 500
0xae26626212773aa00802afaafaaca750257b2e78ba116998fd7865bff4540100Create Pair334594312022-09-23 8:37:4771 days 10 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059376 500
0xe9f4d716fa97730a9aa7fe87612d4bde72588596eb797d10e33146449efc0da5Create Pair334091512022-09-22 3:33:1672 days 15 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059376 500
0x0b03127fd046676b007caa03687f307b8610fe5d230de89ca850e4f0a67ccf34Create Pair334091472022-09-22 3:33:0872 days 15 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059376 500
0xca4e64693b8231b0883943e8cbec0e275c70d7f0cebccbbe5641067d15cbe071Create Pair334088362022-09-22 3:22:3072 days 16 hrs ago0x36cca19c2e8906a2106a0e19b1b8d550ee772439 IN  0x7cfb780010e9c861e03bcbc7ac12e013137d47a50 MATIC1.059376 500
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0x727f045afec95def6cec1223bd64614b96318c1ff45cef960e62e84301f8dd13363485572022-12-02 20:59:2122 hrs 25 mins ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
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0x20e4865409771763a538e80d64b43296b81fb542979a2cd934bf6fbdfa3895cf360011002022-11-24 8:37:569 days 10 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x5844df1e14c9361ba9a22f4204c49952f6a3d8c0d4c68147660b94b988517979358006202022-11-19 11:55:5414 days 7 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x4ee47fc8e29e2fbf5b7fedaa5b521850a8bc59054a364e5c3f54ecc57faf6067357985062022-11-19 10:41:0614 days 8 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0xbd5f98619b906799a005a79cb44818db8a02d24788a67674d78170ee72eaabfa357963772022-11-19 9:27:3814 days 9 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x65f04f1e4a01f5048f747549d4cb8fd57566a18de40eabdb8b6b9d38f96e4843357574362022-11-18 10:36:5915 days 8 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x50d43fa7c0ab35ffaf6a995572075ac8b88955fdc3fbe99049882b6842eac10a357203492022-11-17 12:59:1316 days 6 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x5911a90240ef72c8bddc15aeced386a7e9c2e077ca3dbacbddcf7b7dbd0e73b4357167802022-11-17 10:55:3616 days 8 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x1cc7b70d027c733c81d75c0460e921216a30820070c773c99949108a47faf7fb357055072022-11-17 4:18:4616 days 15 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x37df32e2679878f121c5ab4d74e8fb6d56cf38c8b686639d9eb3c959a483ef30356688642022-11-16 6:49:2517 days 12 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x71833f51c5a1a683f7e1f33c19736ed82647019e0f1c41854853ff0218783ae3353802012022-11-09 3:24:0324 days 16 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0xf79485ef214ba48af809380fa0a7e96e4f7e4dc27f32a11ccaba170efe76dd56353562782022-11-08 13:28:2625 days 5 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x8b43b0c7ef1d11fadfa5c0a3f80a36678553eadff3527bd6a74e9766a818c087353509132022-11-08 10:19:3925 days 9 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0xdb1ec1a03e1700cd34450894d8bd0bc67973cd2b07a080b5b0742717c22c74ba352335022022-11-05 13:50:1628 days 5 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x2d84f13dd34bc8584eece3e48d82496ee48b116142225f9d9b8cfa30fad1977f352334062022-11-05 13:46:5328 days 5 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x078e86c94c8ac1490b3900f7d81eafa71dd116510170994da129a9dc3d7794ce352301992022-11-05 11:55:5528 days 7 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0xe914d2f6744e4f0c8e7bad3bdf3a58dd4a3f2f883ff0403221784a94e8129e2e352137172022-11-05 2:17:4028 days 17 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x143d552ca3115e148fe5420c3a9b0325e6b479bce24d85d31436bf642ba7ea6a352136432022-11-05 2:15:0828 days 17 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0xbe2a20e953cd45af5c2e4e6fd4754c0f91c9f98a17f63ba8c8ee081359d31d32352127912022-11-05 1:43:0928 days 17 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0xf292e2ffc2c1189a174d56339dfdcfbed3e8de37ce65c74b15f38ee5edf57950351835782022-11-04 8:36:1529 days 10 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x6400f0244d28f082f0317fa391db39de692bee50ff0f6a2aae59b41d36822e53351720732022-11-04 1:56:3229 days 17 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0xab8827b4bb22b5a6fe6034e4a69c4ec3f26026fd8616194045f93efd76529c66351586202022-11-03 18:05:2930 days 1 hr ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
0x4a25b736060701fa7e676250db1afe8b6280ff0b5db012d52f96c9f0eb85bf4d351435742022-11-03 9:19:1230 days 10 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
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Contract Source Code Verified (Exact Match)

Contract Name:
MeerkatFactory

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 11 : MeerkatFactory.sol
pragma solidity =0.5.16;

import './interfaces/IMeerkatFactory.sol';
import './MeerkatPair.sol';

contract MeerkatFactory is IMeerkatFactory {
    address public feeTo;
    address public feeToSetter;
    bytes32 public INIT_CODE_HASH = keccak256(abi.encodePacked(type(MeerkatPair).creationCode));

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

    function setFeeToSetter(address _feeToSetter) external {
        require(msg.sender == feeToSetter, 'Meerkat: FORBIDDEN');
        feeToSetter = _feeToSetter;
    }
    
    function setSwapFee(address _pair, uint32 _swapFee) external {
        require(msg.sender == feeToSetter, 'Meerkat: FORBIDDEN');
        MeerkatPair(_pair).setSwapFee(_swapFee);
    }
}

File 2 of 11 : IMeerkatFactory.sol
pragma solidity >=0.5.0;

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

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);
    function INIT_CODE_HASH() external pure returns (bytes32);

    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;
    function setSwapFee(address pair, uint32 swapFee) external;
}

File 3 of 11 : MeerkatPair.sol
pragma solidity =0.5.16;

import './interfaces/IMeerkatPair.sol';
import './MeerkatERC20.sol';
import './libraries/Math.sol';
import './libraries/UQ112x112.sol';
import './interfaces/IERC20.sol';
import './interfaces/IMeerkatFactory.sol';
import './interfaces/IMeerkatCallee.sol';

contract MeerkatPair is IMeerkatPair, MeerkatERC20 {
    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
    uint32 public swapFee = 17; // uses 0.17% default

    uint private unlocked = 1;
    modifier lock() {
        require(unlocked == 1, 'Meerkat: 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))), 'Meerkat: 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, 'Meerkat: FORBIDDEN'); // sufficient check
        token0 = _token0;
        token1 = _token1;
    }

    function setSwapFee(uint32 _swapFee) external {
        require(_swapFee > 0, "MeerkatPair: lower then 0");
        require(msg.sender == factory, 'MeerkatPair: FORBIDDEN');
        require(_swapFee <= 1000, 'MeerkatPair: FORBIDDEN_FEE');
        swapFee = _swapFee;
    }

    // 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), 'Meerkat: 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);
    }

    function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
        address feeTo = IMeerkatFactory(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(2);
                    uint denominator = rootK.mul(3).add(rootKLast.mul(2));
                    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, 'Meerkat: 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, 'Meerkat: 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, 'Meerkat: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Meerkat: 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, 'Meerkat: 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) IMeerkatCallee(to).MeerkatCall(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, 'Meerkat: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
        uint _swapFee = swapFee;
        uint balance0Adjusted = (balance0.mul(10000).sub(amount0In.mul(_swapFee)));
        uint balance1Adjusted = (balance1.mul(10000).sub(amount1In.mul(_swapFee)));
        require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(10000**2), 'Meerkat: 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 4 of 11 : IMeerkatPair.sol
pragma solidity >=0.5.0;

interface IMeerkatPair {
    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 swapFee() external view returns (uint32);

    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;
    function setSwapFee(uint32) external;
}

File 5 of 11 : MeerkatERC20.sol
pragma solidity =0.5.16;

import './interfaces/IMeerkatERC20.sol';
import './libraries/SafeMath.sol';

contract MeerkatERC20 is IMeerkatERC20 {
    using SafeMath for uint;

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

File 6 of 11 : 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 7 of 11 : 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 8 of 11 : 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 9 of 11 : IMeerkatCallee.sol
pragma solidity >=0.5.0;

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

File 10 of 11 : IMeerkatERC20.sol
pragma solidity >=0.5.0;

interface IMeerkatERC20 {
    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 11 of 11 : 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');
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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_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"},{"constant":false,"inputs":[{"internalType":"address","name":"_pair","type":"address"},{"internalType":"uint32","name":"_swapFee","type":"uint32"}],"name":"setSwapFee","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)

00000000000000000000000061c20e2e1ded20856754321d585f7ad28e4d6b27

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0x61c20e2e1ded20856754321d585f7ad28e4d6b27

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000061c20e2e1ded20856754321d585f7ad28e4d6b27


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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