Contract 0x8c26252b14f9b071585b81b240c4ae2176e8cd3c 1

 
 
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Block
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0xa1fdd0e22ab92c6fc74273ce7c3d7e25d8cd172f4f1df360d03dc6257db7375dApprove358587842022-11-20 21:28:428 days 1 hr ago0x3218b340c23545a42d20bd730e512ee73a2224a6 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.0007237830.000000015
0x1b30628c22e51b1a5e2d21e71d0e898b5e2c0aa92ed24322aa94fe2084fe1522Approve355862792022-11-14 6:51:2014 days 16 hrs ago0x8726e883ea7938cb8551c1c45f0e9210411d2d0d IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.0296776732321,230.111631953
0x44f9bdd60f38d65564ca87fe74e3d32c6154dcb9852ba8a4a862564472f84053Approve355860892022-11-14 6:44:4814 days 16 hrs ago0x8726e883ea7938cb8551c1c45f0e9210411d2d0d IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.0659565156932,524.554684758
0x814d6a40b5bba602dfd30939c8200d621dc879b6eb0cc22f7d6abfcec7622881Approve354657002022-11-11 5:05:1417 days 17 hrs ago0x85df0debb5758a2f282a1aace604ea0cd6337665 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.002967498123
0xb94994dc87ef0f923e8d6c0d0114608916a5358ffecbb3101588d91c3f55f966Approve354507672022-11-10 20:22:0718 days 2 hrs ago0x97e7d075167fe10167a835b8623d55dbb2824ab3 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.0041299459488.988277108
0x41465cabf068028e88e4645d4b552d93837786a6bffe01e400566e6579999ed2Approve353757752022-11-09 0:51:4919 days 22 hrs ago0x499e934166a287ae3ca5001c6f141e91bb7e08c1 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.003963247646 151.697452613
0x658eb10a10e31ee1096eec54b4e851384fda6f272a948d2334d7b9cdf7ca0938Approve353756362022-11-09 0:47:0319 days 22 hrs ago0x499e934166a287ae3ca5001c6f141e91bb7e08c1 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.003662807413 151.819920984
0x9186996675474c6e098726215d5239ba76858d56b4c9c43a3553991b18060704Approve353072692022-11-07 8:35:3821 days 14 hrs ago0xdf6925403a5c1fb3ead3bd3e5a8e4663636a92ce IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.011007620978 237.182093903
0x2abb1136ef2e98d715463a0aed838eeb58b03d4b383ef8aaeec5f720a3b8298eApprove352721872022-11-06 12:22:2322 days 10 hrs ago0x008fa7ed1c37e0fd2bf2dc372b6acc5ed1a1919d IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.002822499732 116.989958239
0xfce931fcc81fe7d95cda410e9f81fc2b0974c4a1b0b90e55315b7738ad3a403aApprove352721412022-11-06 12:20:5122 days 10 hrs ago0x008fa7ed1c37e0fd2bf2dc372b6acc5ed1a1919d IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.005232587331 200.282757852
0x303bbdbbbddaca12467349626a7034be7f5fe6fc340d3b7792efded2d03b79f7Approve352718512022-11-06 12:10:5122 days 10 hrs ago0x008fa7ed1c37e0fd2bf2dc372b6acc5ed1a1919d IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.004812345052 199.467174526
0x472500e7cc932fee87879061246fab7b4c669d0cbd46dbfc4948d33e027eb6b0Approve349731092022-10-30 4:42:1329 days 18 hrs ago0xbcc0f94d1688d9159eb27e8b4282079e44ba9db1 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.001206350
0x22d4511d02c006d9bec6814828a62f9cf067f4fecb4ef2901357bcb8770b65d6Approve349675252022-10-30 1:26:4029 days 21 hrs ago0xbcc0f94d1688d9159eb27e8b4282079e44ba9db1 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.002320550
0xb4ceae76ef300b17a2a653c00d669aeccc668190fe61419402606c2b39f57cabApprove348793562022-10-27 22:07:3532 days 49 mins ago0x0aa1bc58cbeb58e326927235e6bebd3372b88dcd IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.001243714749 51.550806149
0xc144aa584e50551407ecd524c1c39615501ee8d7efc06b1eaaeb1ce19f5f2d73Approve347948542022-10-25 20:07:4234 days 2 hrs ago0xcb2b5ec159cfe86111a9f56b8f1e0e00f4e03153 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.006010286997 129.504136979
0x42344257444e963ef80483fb008f4d7747d8f453aa1b03a9b3e44b054180c6ecApprove347187212022-10-23 23:15:0935 days 23 hrs ago0x448b154bcb1f2b8cdfae22ebb04ca18cd91b8d53 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.003548074975 135.806284008
0x52da88a73fd54da0011551e13b378a6469c0902082fc585d8a2f8e5f0060a3b7Approve347184402022-10-23 23:05:2735 days 23 hrs ago0x448b154bcb1f2b8cdfae22ebb04ca18cd91b8d53 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.005728246204 219.254620095
0x879e99fc326341a0ab3f20acdfc5010083bfccebdd2908b5e6c696ebfe5c48abApprove346602202022-10-22 13:10:0537 days 9 hrs ago0x11d9ade68b7673f0b0872de0508efeaa88b6abe0 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.001976319251 75.645688266
0x02dbf57465a1b228ee955f69e7d169169cd1086e9d98cc9a9363197161da6089Approve346601982022-10-22 13:09:2137 days 9 hrs ago0x11d9ade68b7673f0b0872de0508efeaa88b6abe0 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.002109076052 87.419217956
0x78df02aabce8348ddbba79f5de1d62b9dada59bcf71f5e3f0b86761bff51dde0Approve344994902022-10-18 14:20:3241 days 8 hrs ago0x5076e0d2f499cbd0740db4ec89fed1b34e68d496 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.007104155324 294.460553928
0xbe7f917e062824bbc57c0e0e0ffb7f821be49225ffdf616d4f1f68eef5edb7f8Approve344621132022-10-17 15:31:3342 days 7 hrs ago0xd1c1b20aca11267b76ed69f013aa6b8252f54717 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.0116025 250
0x357f135a1cdb2019e5d56df33f93671cc743df67abe969483bf3cf8bc9edaa3bApprove344518682022-10-17 9:33:0942 days 13 hrs ago0x2e26ff7bc1ba49c4a234858f6a75379c56a9c85b IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.00387113395 83.411634348
0xb64304d3ff7455b1b60d1b470d17908e5016e4946bdb8e16d4a7bad012ee56c5Approve338718942022-10-03 8:46:3356 days 14 hrs ago0xd051b8fd12b9c6cdcf58218104341306d831a8f0 IN  0x8c26252b14f9b071585b81b240c4ae2176e8cd3c0 MATIC0.00098916641
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0x1d024e3fe9d485a81fb06901caea25e066dbaa1a70174c8bea26fcde34f29130314163662022-08-02 2:17:34118 days 20 hrs ago 0x7cfb780010e9c861e03bcbc7ac12e013137d47a5  Contract Creation0 MATIC
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0xD15EB8710E28C23993968e671807d572189CC86e

Contract Name:
MeerkatPair

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 10 : 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 2 of 10 : 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 3 of 10 : 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 4 of 10 : 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 5 of 10 : 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 6 of 10 : 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 7 of 10 : 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 8 of 10 : IMeerkatCallee.sol
pragma solidity >=0.5.0;

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

File 9 of 10 : 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 10 of 10 : 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

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ion"},{"constant":true,"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"price0CumulativeLast","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"price1CumulativeLast","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint32","name":"_swapFee","type":"uint32"}],"name":"setSwapFee","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"skim","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"amount0Out","type":"uint256"},{"internalType":"uint256","name":"amount1Out","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"swap","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"swapFee","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"sync","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"token0","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"token1","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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