Contract 0x5bdd1cd910e3307582f213b33699e676e61dead9 1

 

Contract Overview

Balance:
0 MATIC

MATIC Value:
$0.00

Token:
Ad
Ad
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Value [Txn Fee]
0x49d1a3154a8477c0fa2341e97dbb2e0429814a61d003cceb7ad83a88e5d4381bCreate Pair215568132021-11-19 14:09:2216 days 6 hrs ago0x4274a49fbeb724d75b8ba7bfc55fc8495a15ad1e IN  0x5bdd1cd910e3307582f213b33699e676e61dead90 MATIC0.004375560008
0x9bddbadfe5252512e30482fb561543a141c72b850cf7af175142147c1e41ea0dCreate Pair204866142021-10-22 12:05:2844 days 8 hrs ago0xa68e764d8917d253f997df1fed1bda8b38a281c8 IN  0x5bdd1cd910e3307582f213b33699e676e61dead90 MATIC0.032368644
0x0f1c9bc69d70816fd7c758f26d6640a4eb6806ed9f22f06783dba0b6ee71d585Set Fee To191321662021-09-15 10:27:2981 days 10 hrs ago0x3f36990f6b1400635f71bcaa6f4921463d61924c IN  0x5bdd1cd910e3307582f213b33699e676e61dead90 MATIC0.00011582
0x6db966f0c02fdbe88361b45799cc8abb15f1bb21c935c3a8d460ee4c954212abSet Fee To181581632021-08-19 12:57:14108 days 7 hrs ago0x3f36990f6b1400635f71bcaa6f4921463d61924c IN  0x5bdd1cd910e3307582f213b33699e676e61dead90 MATIC0.000144775
0x47d94a8912d510b35fc9e03fd283ea8250db814d7e52cb23c3cf10d1fd365a1bSet Fee To171077002021-07-21 11:38:37137 days 8 hrs ago0x3f36990f6b1400635f71bcaa6f4921463d61924c IN  0x5bdd1cd910e3307582f213b33699e676e61dead90 MATIC0.000092110004
0x9da2d27f52c19d16fbd053dd7c8325994e8ab038fa35fd94952239935a16a13a0x60806040170351872021-07-19 13:41:13139 days 6 hrs ago0xa68e764d8917d253f997df1fed1bda8b38a281c8 IN  Contract Creation0 MATIC0.002498598
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0xf804f10e5cc48fa9390b945778d658bd011fb81882401c50a1e5d70167bf321c216525512021-11-22 1:26:3113 days 19 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x49d1a3154a8477c0fa2341e97dbb2e0429814a61d003cceb7ad83a88e5d4381b215568132021-11-19 14:09:2216 days 6 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x29ac03d46238299cfec138a3541cf79edbbfb204ea34ca779dcdc96e7c44d7ec215059112021-11-18 6:29:4417 days 13 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0xd5b5ea1215265099e901f426ab5fb7f393e493eb64a444ff422cbf4f74180afb212832212021-11-12 12:57:1123 days 7 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x0dd53ad3b5528159760e377358248f576045f2d2bf5d31bbf1e35f51df81055f211711962021-11-09 14:07:2326 days 6 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x92d4e9ebd5db2740de2559bc19cedb7405427ce735040096a406831ad93559c5210985072021-11-07 17:42:0528 days 2 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x8a239fb82798e7ec3b9a1459a1eb4f862a72b2dfcc12ad2ef1cf4a97240a5964205482872021-10-24 5:02:1642 days 15 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x7742f485730eaf06dc0512075cfb822513130ce3b20961747253b72805bdd0c0205180172021-10-23 9:50:1943 days 10 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x9bddbadfe5252512e30482fb561543a141c72b850cf7af175142147c1e41ea0d204866142021-10-22 12:05:2844 days 8 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x834869be7b33c173ddb957ec76fb8ecb72a36f8e74e41c42f87840e50c83167b201042202021-10-11 16:10:4755 days 4 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0xcf215df147d40541b9ed51c07bbfc481e9d896989db76770a58da5c868b53af8195805972021-09-27 17:24:0969 days 3 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0xc3d1f67e0e3480034b6e2597d340f2e8cb62e2f9b38b6dd932f17038ed87de96194144932021-09-23 8:51:2173 days 11 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0xf0493daf467859c97f8de172cc57ea356359705e5fac03a30794ae94b7afadec194143582021-09-23 8:46:4373 days 11 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x7b51dd0c09549e16d26f4898eece7fc4fd09d6b95aff41b3d82fb3304a826297193607712021-09-21 20:32:0474 days 23 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0xafacd6d4190e58aa3abf604c457bd67ad9e2bc6ed11507024b2a0c95d3d53020191220002021-09-15 3:52:3681 days 16 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0xfa12fad5e5f18f8921754d93fc6746017c3741d057292d5d8b3d669a65a36adf191219982021-09-15 3:52:3281 days 16 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0xeeb5087a11fb6cc2c0368a16e14c11bab22e079e3c1b820f8b110e34eb926609191044062021-09-14 16:40:2382 days 3 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x3931c5bd4db8789efd75ba4d00121b23ba102d80fdcf2ec24cd8926ae3182b92191044052021-09-14 16:40:1782 days 3 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x6341b82e76edfa390f3ecad5659dd752f672f6671223c63bb752a604de8184a1191044042021-09-14 16:40:1182 days 3 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x589e989b93161a2b2b9a098e22d0a4b5879c1520f21b31874418f4a8a1065788191044032021-09-14 16:40:0582 days 3 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x0627835218e8c47ee9efbb0be5a3b3b30ccb7d70364ce310eb3cd2322bbef232191044032021-09-14 16:40:0582 days 3 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x45eb99bb4b34da2c9042bf5251411622f4791cf499d6ca0253713884acfc2b38191043092021-09-14 16:35:1382 days 3 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0xdf6ada34b281a8c544bbc79bd383a3e7adb83dd962503c579087e3bd1b3e10bb191040072021-09-14 16:24:3482 days 4 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0x482682ed0e0de81c4f6e9148a8a2e58d4e1276cbdccc9f38a8f16be83c288fea191039412021-09-14 16:22:1682 days 4 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
0xdd24abe1781c8080c4445a0656a445c905886f62fe7f1f780c80e89a5b349090191037442021-09-14 16:15:3082 days 4 hrs ago 0x5bdd1cd910e3307582f213b33699e676e61dead9  Contract Creation0 MATIC
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Contract Source Code Verified (Exact Match)

Contract Name:
PolydexFactory

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 9 : PolydexFactory.sol
// SPDX-License-Identifier: MIT

pragma solidity =0.7.6;

import './interfaces/IPolydexFactory.sol';
import './PolydexPair.sol';

contract PolydexFactory is IPolydexFactory {
    address public override feeTo;
    address public override feeToSetter;
    address public override migrator;

    mapping(address => mapping(address => address)) public override getPair;
    address[] public override allPairs;

    constructor(address _feeToSetter) {
        feeToSetter = _feeToSetter;
    }

    function allPairsLength() external override view returns (uint) {
        return allPairs.length;
    }

    function pairCodeHash() external pure returns (bytes32) {
        return keccak256(type(PolydexPair).creationCode);
    }

    function createPair(address tokenA, address tokenB) external override returns (address pair) {
        require(tokenA != tokenB, 'Polydex: IDENTICAL_ADDRESSES');
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'Polydex: ZERO_ADDRESS');
        require(getPair[token0][token1] == address(0), 'Polydex: PAIR_EXISTS'); // single check is sufficient
        bytes memory bytecode = type(PolydexPair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        PolydexPair(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 override {
        require(msg.sender == feeToSetter, 'Polydex: FORBIDDEN');
        feeTo = _feeTo;
    }

    function setMigrator(address _migrator) external override {
        require(msg.sender == feeToSetter, 'Polydex: FORBIDDEN');
        migrator = _migrator;
    }

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

}

File 2 of 9 : IPolydexFactory.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);
    function migrator() 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;
    function setMigrator(address) external;
}

File 3 of 9 : PolydexPair.sol
// SPDX-License-Identifier: MIT

pragma solidity =0.7.6;

import './PolydexERC20.sol';
import './libraries/Math.sol';
import './libraries/UQ112x112.sol';
import './interfaces/IERC20.sol';
import './interfaces/IPolydexFactory.sol';
import './interfaces/IPolydexCallee.sol';


interface IMigrator {
    // Return the desired amount of liquidity token that the migrator wants.
    function desiredLiquidity() external view returns (uint256);
}

contract PolydexPair is PolydexERC20 {
    using SafeMathPolydex  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, 'Polydex: 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))), 'Polydex: 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() {
        factory = msg.sender;
    }

    // called once by the factory at time of deployment
    function initialize(address _token0, address _token1) external {
        require(msg.sender == factory, 'Polydex: 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), 'Polydex: 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 = IPolydexFactory(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 = IERC20Polydex(token0).balanceOf(address(this));
        uint balance1 = IERC20Polydex(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) {
            address migrator = IPolydexFactory(factory).migrator();
            if (msg.sender == migrator) {
                liquidity = IMigrator(migrator).desiredLiquidity();
                require(liquidity > 0 && liquidity != uint256(-1), "Bad desired liquidity");
            } else {
                require(migrator == address(0), "Must not have migrator");
                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, 'Polydex: 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 = IERC20Polydex(_token0).balanceOf(address(this));
        uint balance1 = IERC20Polydex(_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, 'Polydex: INSUFFICIENT_LIQUIDITY_BURNED');
        _burn(address(this), liquidity);
        _safeTransfer(_token0, to, amount0);
        _safeTransfer(_token1, to, amount1);
        balance0 = IERC20Polydex(_token0).balanceOf(address(this));
        balance1 = IERC20Polydex(_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, 'Polydex: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Polydex: 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, 'Polydex: 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) IPolydexCallee(to).polydexCall(msg.sender, amount0Out, amount1Out, data);
        balance0 = IERC20Polydex(_token0).balanceOf(address(this));
        balance1 = IERC20Polydex(_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, 'Polydex: 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), 'Polydex: 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, IERC20Polydex(_token0).balanceOf(address(this)).sub(reserve0));
        _safeTransfer(_token1, to, IERC20Polydex(_token1).balanceOf(address(this)).sub(reserve1));
    }

    // force reserves to match balances
    function sync() external lock {
        _update(IERC20Polydex(token0).balanceOf(address(this)), IERC20Polydex(token1).balanceOf(address(this)), reserve0, reserve1);
    }
}

File 4 of 9 : PolydexERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity =0.7.6;

import './libraries/SafeMath.sol';

contract PolydexERC20 {
    using SafeMathPolydex for uint;

    string public constant name = 'Polydex LP Token';
    string public constant symbol = 'Polydex-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() {
        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, 'Polydex: 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, 'Polydex: INVALID_SIGNATURE');
        _approve(owner, spender, value);
    }
}

File 5 of 9 : Math.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

// 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 6 of 9 : UQ112x112.sol
// SPDX-License-Identifier: MIT

pragma solidity =0.7.6;

// 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 7 of 9 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

interface IERC20Polydex {
    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 8 of 9 : IPolydexCallee.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

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

File 9 of 9 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity =0.7.6;

// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)

library SafeMathPolydex {
    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",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_feeToSetter","type":"address"}],"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"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"allPairs","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"allPairsLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"}],"name":"createPair","outputs":[{"internalType":"address","name":"pair","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"feeTo","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"feeToSetter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"getPair","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"migrator","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pairCodeHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"_feeTo","type":"address"}],"name":"setFeeTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_feeToSetter","type":"address"}],"name":"setFeeToSetter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_migrator","type":"address"}],"name":"setMigrator","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

0000000000000000000000003f36990f6b1400635f71bcaa6f4921463d61924c

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0x3f36990f6b1400635f71bcaa6f4921463d61924c

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000003f36990f6b1400635f71bcaa6f4921463d61924c


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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