Contract 0xd1ec85bb8f3d3adcb46ba430449966e2883ba176 6

 

Contract Overview

Balance:
0 MATIC

MATIC Value:
$0.00

Token:
 
Txn Hash
Method
Block
From
To
Value [Txn Fee]
0xfb3e9f708f5882027f54523aaf522e80edb7b0d14a126b16f55d7080dc12dd2eApprove447777922023-07-07 4:27:4189 days 21 hrs ago0xd0846d7d06f633b2be43766e434edf0ace9ba909 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003567096148
0x0e35cadec002892e94ab13dd564d64ecf21acaf26680ff427a94411ae550cee6Approve447776092023-07-07 4:20:3989 days 21 hrs ago0xd0846d7d06f633b2be43766e434edf0ace9ba909 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003205566133
0xb935994b081d912b0ca23285dd9c688734c629daedd8629bccea1e5cf6c1c442Approve424343092023-05-08 1:11:26150 days 1 hr ago0x20a1e36cb8e1e15aa1f75477e2e8816c0b393ae0 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003473447331 133.072076145
0x101c04d597b593465ab4cb4978896bb763eb8bf270ace18f64420d6d82d4ada7Approve424342992023-05-08 1:11:04150 days 1 hr ago0x20a1e36cb8e1e15aa1f75477e2e8816c0b393ae0 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003275313056 135.893828571
0x73747cb509af8d270c7597e31c72bbe5ad459d3c7e5ca14496bb44200344378cApprove424342662023-05-08 1:09:54150 days 1 hr ago0x20a1e36cb8e1e15aa1f75477e2e8816c0b393ae0 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.004005625649 166.194741065
0x1974bc320b320bc25d14e3bb28ff9940f5ce56c45399b34710b6354b526cbb59Approve417772682023-04-21 7:18:35166 days 18 hrs ago lapulga.blockchain  IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.00711605786 295.247608525
0x233b59f42e1bbd8cbab249d10c6da6837841b7dd9170cc5e3d2ed0b3d0432711Approve417772172023-04-21 7:16:37166 days 18 hrs ago lapulga.blockchain  IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.005415783268 224.702649916
0xac181ecbd9833ec56839ea639d8e0f387efb1f55405a9ab8b1f43e9b8dd2e554Approve413243692023-04-09 9:56:06178 days 16 hrs ago0x53a07cc0f051d2cdfea29f5b72dafcfd2df4e6f1 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003189338889 132.326731805
0xbf28694fccbdfbf18bbcf81598f19192b9d8d2e1ea9bef86995bd386c099b019Approve413243682023-04-09 9:56:04178 days 16 hrs ago0x53a07cc0f051d2cdfea29f5b72dafcfd2df4e6f1 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003110081404 129.038312375
0xc4c45f0f3d4f9b02f06eb9650f5c30cad2313af7669e81ae087742d33491ffdbApprove410256222023-04-01 17:09:31186 days 9 hrs ago0xde3c0b11e86e2d1e4cd4c2d66276e1a1ca78babd IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.002795832116
0x4f5f4e555dd8749773805b1b4baf0a3602e74cc9663479557858d807fa8d98baApprove410252162023-04-01 16:55:09186 days 9 hrs ago0xde3c0b11e86e2d1e4cd4c2d66276e1a1ca78babd IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003928626163
0x3cfb159af1548836a52b4b92ae080f40c5f3c1f1e58d002d5d04bb5103ac132bApprove409230582023-03-30 2:49:39188 days 23 hrs ago0x82ec6851f3776650e401dc8cb94cedb7b1b43d1c IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003552057101 147.37603108
0x3838036772104354c5d9c34d67b2f7d5a5f177905a31ac3b8b5c1dc92ccec280Approve409230572023-03-30 2:49:37188 days 23 hrs ago0x82ec6851f3776650e401dc8cb94cedb7b1b43d1c IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003459322693 143.52844967
0xc4ff71bff889eb107cd19044c96629eb2fc5ebdd50d8dccf8de61ecebfd24ec9Approve396937962023-02-25 12:23:22221 days 13 hrs ago0x60a1b6ee4ff13ea1a5c9ed595218e1d1f11c84bf IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.002601689263 107.944953256
0x844f4e5057b109caecf80aa825de5003108d029ad1df6d9280dbd7145c3397d5Approve392220672023-02-12 21:27:46234 days 4 hrs ago0xad4ea24768dbf406d2c37092a055deec3279e527 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.003648290211 151.368774838
0x623273c338004c568ee5f4ba6242e05c6572d8ef20ab29092c3294bb6c5447d1Approve367195372022-12-12 0:30:24297 days 1 hr ago0xa32369a38a872d0f4da54301fcda5f3172b7eaa7 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.000723070393 30.000431248
0x7adf2ab53068c9bf790aae8a06cfde0b96530fc2da27d0f242c36d730aacf52eApprove357957632022-11-19 9:06:30319 days 17 hrs ago0xd7260631eb8751c74ab3d407274dff030d140b10 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.002510230547 104.150300715
0x71e9df108e2faf39564ea9d67135e70554c838cbe3aeab9580ee7e481bc003a6Approve292320542022-06-06 10:22:17485 days 15 hrs ago0xef669b7c021853c091b5ef77068594ff081f987e IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.00139158000130.000000026
0x4e7d99974bf4f2728b175f9693d1c0e0aee30ce66fd403e4692340ab1b04026fApprove220510032021-12-02 13:49:27671 days 12 hrs ago0x80447e9d8e179cff3958750d440390f956a945c1 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.001560708108
0xef1134c388e8d00d1bed3ad22e23ce598e4ac9d35486fdb7484c751a7d5d8a32Approve220509572021-12-02 13:47:55671 days 12 hrs ago0x80447e9d8e179cff3958750d440390f956a945c1 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.00070809949
0x760b0d3ae9f7fb7d34301489ce548da3862cfff1576703e7ad21541be69d6f12Approve215250742021-11-18 18:37:19685 days 7 hrs ago0xd0dd34d445942f624a3a5701c26de4319e616e8f IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.002846847197
0x465f4aa83d056e5322b04eba76c343a7b3288624830c41846f94c685f788592cApprove215250632021-11-18 18:36:57685 days 7 hrs ago0xd0dd34d445942f624a3a5701c26de4319e616e8f IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.002095395145
0xa14f4ab02b5cfc119d6d8ad8ea80dcebfa53bbdb8e8a22527d5b04149cf05e08Approve192874962021-09-19 21:32:20745 days 4 hrs ago0x4ab825fb4281a4565dd5cc3c0fa4433396719580 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.0000463861
0x769d5d183e19ce611cb198ced2063947bd57944ba0e9627f9bbf74b618b97297Approve188875592021-09-08 16:23:02756 days 9 hrs ago0x12e5513b11240b7a4adb27f52b36e785e18cfde0 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.000016040611.11
0xf7951791b5caf10f443641af9a5a62b0b327c55a3d62a602e399d692387a95d3Approve188870272021-09-08 16:02:10756 days 10 hrs ago0x12e5513b11240b7a4adb27f52b36e785e18cfde0 IN  0xd1ec85bb8f3d3adcb46ba430449966e2883ba1760 MATIC0.0000903188486.250006841
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0xef926fb8eb6fae99a4e1fc278f09db3c8fa2e0eb00faa910f2723243e320a444141248272021-05-05 15:02:20882 days 11 hrs ago 0x34de5ce6c9a395db5710119419a7a29baa435c88  Contract Creation0 MATIC
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Similar Match Source Code
This contract matches the deployed ByteCode of the Source Code for Contract 0x1df7ADAeD1F7f36C822A3079198815b284aD8475
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
PolyZapPair

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 999999 runs

Other Settings:
default evmVersion
File 1 of 10 : PolyZapERC20.sol
pragma solidity =0.5.16;

import './interfaces/IPolyZapERC20.sol';
import './libraries/SafeMath.sol';

contract PolyZapERC20 is IPolyZapERC20 {
    using SafeMath for uint;

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

File 2 of 10 : PolyZapPair.sol
pragma solidity =0.5.16;

import './interfaces/IPolyZapPair.sol';
import './PolyZapERC20.sol';
import './libraries/Math.sol';
import './libraries/UQ112x112.sol';
import './interfaces/IERC20.sol';
import './interfaces/IPolyZapFactory.sol';
import './interfaces/IPolyZapCallee.sol';

contract PolyZapPair is IPolyZapPair, PolyZapERC20 {
    using SafeMath  for uint;
    using UQ112x112 for uint224;

    uint public constant MINIMUM_LIQUIDITY = 10**3;
    bytes4 private constant SELECTOR = bytes4(keccak256(bytes('transfer(address,uint256)')));

    address public factory;
    address public token0;
    address public token1;

    uint112 private reserve0;           // uses single storage slot, accessible via getReserves
    uint112 private reserve1;           // uses single storage slot, accessible via getReserves
    uint32  private blockTimestampLast; // uses single storage slot, accessible via getReserves

    uint public price0CumulativeLast;
    uint public price1CumulativeLast;
    uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event

    uint private unlocked = 1;
    modifier lock() {
        require(unlocked == 1, 'PolyZap: 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))), 'PolyZap: 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, 'PolyZap: 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), 'PolyZap: OVERFLOW');
        uint32 blockTimestamp = uint32(block.timestamp % 2**32);
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
        if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
            // * never overflows, and + overflow is desired
            price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
            price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
        }
        reserve0 = uint112(balance0);
        reserve1 = uint112(balance1);
        blockTimestampLast = blockTimestamp;
        emit Sync(reserve0, reserve1);
    }

    // if fee is on, mint liquidity equivalent to 8/25 of the growth in sqrt(k)
    function _mintFee(uint112 _reserve0, uint112 _reserve1) private returns (bool feeOn) {
        address feeTo = IPolyZapFactory(factory).feeTo();
        feeOn = feeTo != address(0);
        uint _kLast = kLast; // gas savings
        if (feeOn) {
            if (_kLast != 0) {
                uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
                uint rootKLast = Math.sqrt(_kLast);
                if (rootK > rootKLast) {
                    uint numerator = totalSupply.mul(rootK.sub(rootKLast)).mul(8);
                    uint denominator = rootK.mul(17).add(rootKLast.mul(8));
                    uint liquidity = numerator / denominator;
                    if (liquidity > 0) _mint(feeTo, liquidity);
                }
            }
        } else if (_kLast != 0) {
            kLast = 0;
        }
    }

    // this low-level function should be called from a contract which performs important safety checks
    function mint(address to) external lock returns (uint liquidity) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        uint balance0 = IERC20(token0).balanceOf(address(this));
        uint balance1 = IERC20(token1).balanceOf(address(this));
        uint amount0 = balance0.sub(_reserve0);
        uint amount1 = balance1.sub(_reserve1);

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        if (_totalSupply == 0) {
            liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
            _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
        } else {
            liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
        }
        require(liquidity > 0, 'PolyZap: 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, 'PolyZap: 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, 'PolyZap: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'PolyZap: 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, 'PolyZap: 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) IPolyZapCallee(to).polyZapCall(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, 'PolyZap: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
            uint balance0Adjusted = (balance0.mul(10000).sub(amount0In.mul(25)));
            uint balance1Adjusted = (balance1.mul(10000).sub(amount1In.mul(25)));
            require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(10000**2), 'PolyZap: 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 3 of 10 : IERC20.sol
pragma solidity >=0.5.0;

/*
 * PolyZapFinance
 * App:             https://thunderswap.finance
 * Medium:          https://medium.com/@thunder_swap
 * Twitter:         https://twitter.com/thunder_swap
 * Telegram:        https://t.me/thunder_swap
 * Announcements:   https://t.me/thunder_swap_news
 * GitHub:          https://github.com/thunder-swap-finance
 */

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 4 of 10 : IPolyZapCallee.sol
pragma solidity >=0.5.0;

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

File 5 of 10 : IPolyZapERC20.sol
pragma solidity >=0.5.0;

interface IPolyZapERC20 {
    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 6 of 10 : IPolyZapFactory.sol
pragma solidity >=0.5.0;

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

    function feeTo() external view returns (address);
    function feeToSetter() external view returns (address);

    function getPair(address tokenA, address tokenB) external view returns (address pair);
    function allPairs(uint) external view returns (address pair);
    function allPairsLength() external view returns (uint);

    function createPair(address tokenA, address tokenB) external returns (address pair);

    function setFeeTo(address) external;
    function setFeeToSetter(address) external;
}

File 7 of 10 : IPolyZapPair.sol
pragma solidity >=0.5.0;

interface IPolyZapPair {
    event Approval(address indexed owner, address indexed spender, uint value);
    event Transfer(address indexed from, address indexed to, uint value);

    function name() external pure returns (string memory);
    function symbol() external pure returns (string memory);
    function decimals() external pure returns (uint8);
    function totalSupply() external view returns (uint);
    function balanceOf(address owner) external view returns (uint);
    function allowance(address owner, address spender) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);
    function transfer(address to, uint value) external returns (bool);
    function transferFrom(address from, address to, uint value) external returns (bool);

    function DOMAIN_SEPARATOR() external view returns (bytes32);
    function PERMIT_TYPEHASH() external pure returns (bytes32);
    function nonces(address owner) external view returns (uint);

    function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;

    event Mint(address indexed sender, uint amount0, uint amount1);
    event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
    event Swap(
        address indexed sender,
        uint amount0In,
        uint amount1In,
        uint amount0Out,
        uint amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    function MINIMUM_LIQUIDITY() external pure returns (uint);
    function factory() external view returns (address);
    function token0() external view returns (address);
    function token1() external view returns (address);
    function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
    function price0CumulativeLast() external view returns (uint);
    function price1CumulativeLast() external view returns (uint);
    function kLast() external view returns (uint);

    function mint(address to) external returns (uint liquidity);
    function burn(address to) external returns (uint amount0, uint amount1);
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
    function skim(address to) external;
    function sync() external;

    function initialize(address, address) external;
}

File 8 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 9 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');
    }
}

File 10 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);
    }
}

Settings
{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 999999
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount0","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount1","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount0","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount1","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount0In","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount1In","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount0Out","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount1Out","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Swap","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint112","name":"reserve0","type":"uint112"},{"indexed":false,"internalType":"uint112","name":"reserve1","type":"uint112"}],"name":"Sync","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"constant":true,"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"MINIMUM_LIQUIDITY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"burn","outputs":[{"internalType":"uint256","name":"amount0","type":"uint256"},{"internalType":"uint256","name":"amount1","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"getReserves","outputs":[{"internalType":"uint112","name":"_reserve0","type":"uint112"},{"internalType":"uint112","name":"_reserve1","type":"uint112"},{"internalType":"uint32","name":"_blockTimestampLast","type":"uint32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_token0","type":"address"},{"internalType":"address","name":"_token1","type":"address"}],"name":"initialize","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"kLast","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"mint","outputs":[{"internalType":"uint256","name":"liquidity","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"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":"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":"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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