Contract 0xc831a5cbfb4ac2da5ed5b194385dfd9bf5bfcba7

 
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0x2fd5ba38824041717b46d070a32d8ab4c3ad1898a7a04e7270fc18191ff32fa3Set Fee To Sette...509795512022-11-16 15:46:49134 days 2 hrs ago0x61e468f685392948504da7a49463fd508ec1e2cd IN  WigoSwap: Factory0 FTM0.003114182399
0xbe5be68d1f6e61ffd3657caed85404e849f369503ed4b59262c07c09741b212cSet Fee To289243302022-01-24 15:57:10430 days 2 hrs ago0x61e468f685392948504da7a49463fd508ec1e2cd IN  WigoSwap: Factory0 FTM0.030132068656
0x1f0b7df21b834e074a4d441e994279696e01c799206bc970189a82d8b2eb5c320x60806040288989322022-01-24 9:19:40430 days 8 hrs agoWigoSwap: Deployer IN  Create: WigoswapFactory0 FTM1.13250155
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0x226d58bfa39a32bf6334ee80eccd8da089d501591bf3072e70745ea23961afda580049152023-03-20 20:17:159 days 21 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0xfb32706dd5146591b190dde28af0475f9b8d707b64bad93fc3c6b738042da656576103362023-03-15 3:22:5815 days 14 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x77740c35aa9f56b3dd17f3fc92ff0d60e70e1b40eb81c3a272218a4ac10b2df8575713682023-03-14 14:56:2516 days 3 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x9e01fa0475c4ed7ca223b8bce22397fca8be8af269ba6d6f7f9aa49b438396dd575476842023-03-14 4:10:4616 days 14 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x0bb6fa59ac53f3e333364a75d10e622f4b5d5a3185cec4c2bcb6c52d3be83931575329642023-03-13 20:48:3316 days 21 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x18ba44ea49231a5f4bb633a06b5f21938e85645ad6f9e8eb2ca9c7e30baa03f3575018812023-03-13 9:10:0917 days 9 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0xf61647edf206f7de7a268a01a509c822e3bc673b893d58cdcd6e8a08237a7c19573896642023-03-11 13:06:1319 days 5 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0xa1ea2f240c34c104c2ecfaeba3655db66c86b8e331c37923ad9721bcb1adb5f5571056182023-03-07 6:22:2323 days 11 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x83e32f36667aa409d2d7ba38db480ad9f5aca1c9336b577946b22f73f91a28ba571055672023-03-07 6:21:0723 days 11 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x5051fcbcb580236381f68c30266149e89eaa556e40f042db4fad9138433f7c89570712762023-03-06 16:51:2024 days 1 hr ago WigoSwap: Factory  Contract Creation0 FTM
0x3078c9820c7a817292f7c8758a5df3d0f0d42bb749f3918f1c749421265cb059570587812023-03-06 12:52:1624 days 5 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0xe120d2546dce4148b64cf8602769d5a10fa96b08d7854698bdc70d736a6c248a568832022023-03-03 20:43:2426 days 21 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0xc9e77c1068592a6174aefeb730c0467a5f29c3041fd7df130a9f1ff8191e936f567597862023-03-02 0:20:5628 days 17 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x0c8bf12d144a3993679b692364011f5168ad2aea93a16cf72645f6a215b8d0cd566390692023-02-28 0:49:0730 days 17 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x66e92cea864f0a51b8aec1c8939e4bceb782de812213e7293d6d75fc9f12a876566197272023-02-27 18:13:0530 days 23 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x334f1d740bb53f792de5562f783e619aa804cb311d1c88598edea1380a447387565646142023-02-26 20:11:4531 days 22 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x96ea5cab1f25abb6b375d794503bd5b5c2e75f8f2945b880ef740ebf8abe8f50565444472023-02-26 12:05:0732 days 6 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x7ce82dcef6acd63f9ec2e0440c0bc9cb3549bbf5320c5a14acccd9efd8c4de72565041552023-02-25 18:01:3433 days 10 mins ago WigoSwap: Factory  Contract Creation0 FTM
0xa7bd6d178bc738f09c78c5936790a9c2a0ef5769a0e2ef27bf8da26820068b3a565032382023-02-25 17:42:1433 days 30 mins ago WigoSwap: Factory  Contract Creation0 FTM
0x4924bb1f9f7ab6ded38988f6ca2d81756084e48e44b64e74a551cfff5652a016565029742023-02-25 17:36:2333 days 36 mins ago WigoSwap: Factory  Contract Creation0 FTM
0xf65c6428e1a2b426974cea93009375a35e3550b511eecd34bfa7fde4409417b4564147892023-02-24 10:44:1034 days 7 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x2fe28e53771b7b101ae536248247ffbdcf6eecb53b6d447a8bb6c4b28117cf44564142832023-02-24 10:33:1534 days 7 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0x0a6e02aa9c21fa9b49dc927c9e718c5b7bb536d610e25eef0e036019f4cdce6f564025852023-02-24 5:45:3034 days 12 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0xb67cbc1792f6f2e5c500cccecc74397d8a61da63651c579b288328f8c34f998e563821222023-02-23 20:36:5534 days 21 hrs ago WigoSwap: Factory  Contract Creation0 FTM
0xe8cc2ebf71a5ff06c550c81cfb9d50aa8996db5de5050ee9d288bf5196d2d3ef563586592023-02-23 12:52:3535 days 5 hrs ago WigoSwap: Factory  Contract Creation0 FTM
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Contract Source Code Verified (Exact Match)

Contract Name:
WigoswapFactory

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 999999 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at FtmScan.com on 2022-01-24
*/

// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;

interface IWigoswapFactory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    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(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

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

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;
}

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

library SafeMath {
    function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require((z = x + y) >= x, "ds-math-add-overflow");
    }

    function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require((z = x - y) <= x, "ds-math-sub-underflow");
    }

    function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        require(y == 0 || (z = x * y) / y == x, "ds-math-mul-overflow");
    }
}

contract WigoswapERC20 {
    using SafeMath for uint256;

    string public constant name = "Wigo LPs";
    string public constant symbol = "Wigo-LP";
    uint8 public constant decimals = 18;
    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) 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 => uint256) public nonces;

    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    constructor() public {
        uint256 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, uint256 value) internal {
        totalSupply = totalSupply.add(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(address(0), to, value);
    }

    function _burn(address from, uint256 value) internal {
        balanceOf[from] = balanceOf[from].sub(value);
        totalSupply = totalSupply.sub(value);
        emit Transfer(from, address(0), value);
    }

    function _approve(
        address owner,
        address spender,
        uint256 value
    ) private {
        allowance[owner][spender] = value;
        emit Approval(owner, spender, value);
    }

    function _transfer(
        address from,
        address to,
        uint256 value
    ) private {
        balanceOf[from] = balanceOf[from].sub(value);
        balanceOf[to] = balanceOf[to].add(value);
        emit Transfer(from, to, value);
    }

    function approve(address spender, uint256 value) external returns (bool) {
        _approve(msg.sender, spender, value);
        return true;
    }

    function transfer(address to, uint256 value) external returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool) {
        if (allowance[from][msg.sender] != uint256(-1)) {
            allowance[from][msg.sender] = allowance[from][msg.sender].sub(
                value
            );
        }
        _transfer(from, to, value);
        return true;
    }

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external {
        require(deadline >= block.timestamp, "Wigoswap: 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,
            "Wigoswap: INVALID_SIGNATURE"
        );
        _approve(owner, spender, value);
    }
}

// a library for performing various math operations

library Math {
    function min(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = x < y ? x : y;
    }

    // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
    function sqrt(uint256 y) internal pure returns (uint256 z) {
        if (y > 3) {
            z = y;
            uint256 x = y / 2 + 1;
            while (x < z) {
                z = x;
                x = (y / x + x) / 2;
            }
        } else if (y != 0) {
            z = 1;
        }
    }
}

// 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);
    }
}

interface IERC20 {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 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 (uint256);

    function balanceOf(address owner) external view returns (uint256);

    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    function approve(address spender, uint256 value) external returns (bool);

    function transfer(address to, uint256 value) external returns (bool);

    function transferFrom(
        address from,
        address to,
        uint256 value
    ) external returns (bool);
}

interface IWigoswapCallee {
    function wigoswapCall(
        address sender,
        uint256 amount0,
        uint256 amount1,
        bytes calldata data
    ) external;
}

contract WigoswapPair is WigoswapERC20 {
    using SafeMath for uint256;
    using UQ112x112 for uint224;

    uint256 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

    uint256 public price0CumulativeLast;
    uint256 public price1CumulativeLast;
    uint256 public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event

    uint256 private unlocked = 1;
    modifier lock() {
        require(unlocked == 1, "Wigoswap: 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,
        uint256 value
    ) private {
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(SELECTOR, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "Wigoswap: TRANSFER_FAILED"
        );
    }

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 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, "Wigoswap: FORBIDDEN"); // sufficient check
        token0 = _token0;
        token1 = _token1;
    }

    // update reserves and, on the first call per block, price accumulators
    function _update(
        uint256 balance0,
        uint256 balance1,
        uint112 _reserve0,
        uint112 _reserve1
    ) private {
        require(
            balance0 <= uint112(-1) && balance1 <= uint112(-1),
            "Wigoswap: 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 +=
                uint256(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) *
                timeElapsed;
            price1CumulativeLast +=
                uint256(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 1/19 of the growth in sqrt(k)
    function _mintFee(uint112 _reserve0, uint112 _reserve1)
        private
        returns (bool feeOn)
    {
        address feeTo = IWigoswapFactory(factory).feeTo();
        feeOn = feeTo != address(0);
        uint256 _kLast = kLast; // gas savings
        if (feeOn) {
            if (_kLast != 0) {
                uint256 rootK = Math.sqrt(uint256(_reserve0).mul(_reserve1));
                uint256 rootKLast = Math.sqrt(_kLast);
                if (rootK > rootKLast) {
                    uint256 numerator = totalSupply.mul(rootK.sub(rootKLast));
                    uint256 denominator = rootK.mul(18).add(rootKLast);
                    uint256 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 (uint256 liquidity) {
        (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
        uint256 balance0 = IERC20(token0).balanceOf(address(this));
        uint256 balance1 = IERC20(token1).balanceOf(address(this));
        uint256 amount0 = balance0.sub(_reserve0);
        uint256 amount1 = balance1.sub(_reserve1);

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint256 _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, "Wigoswap: INSUFFICIENT_LIQUIDITY_MINTED");
        _mint(to, liquidity);

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint256(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 (uint256 amount0, uint256 amount1)
    {
        (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
        address _token0 = token0; // gas savings
        address _token1 = token1; // gas savings
        uint256 balance0 = IERC20(_token0).balanceOf(address(this));
        uint256 balance1 = IERC20(_token1).balanceOf(address(this));
        uint256 liquidity = balanceOf[address(this)];

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint256 _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,
            "Wigoswap: 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 = uint256(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(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external lock {
        require(
            amount0Out > 0 || amount1Out > 0,
            "Wigoswap: INSUFFICIENT_OUTPUT_AMOUNT"
        );
        (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
        require(
            amount0Out < _reserve0 && amount1Out < _reserve1,
            "Wigoswap: INSUFFICIENT_LIQUIDITY"
        );

        uint256 balance0;
        uint256 balance1;
        {
            // scope for _token{0,1}, avoids stack too deep errors
            address _token0 = token0;
            address _token1 = token1;
            require(to != _token0 && to != _token1, "Wigoswap: 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)
                IWigoswapCallee(to).wigoswapCall(
                    msg.sender,
                    amount0Out,
                    amount1Out,
                    data
                );
            balance0 = IERC20(_token0).balanceOf(address(this));
            balance1 = IERC20(_token1).balanceOf(address(this));
        }
        uint256 amount0In = balance0 > _reserve0 - amount0Out
            ? balance0 - (_reserve0 - amount0Out)
            : 0;
        uint256 amount1In = balance1 > _reserve1 - amount1Out
            ? balance1 - (_reserve1 - amount1Out)
            : 0;
        require(
            amount0In > 0 || amount1In > 0,
            "Wigoswap: INSUFFICIENT_INPUT_AMOUNT"
        );
        {
            // scope for reserve{0,1}Adjusted, avoids stack too deep errors
            uint256 balance0Adjusted = balance0.mul(10000).sub(
                amount0In.mul(19)
            );
            uint256 balance1Adjusted = balance1.mul(10000).sub(
                amount1In.mul(19)
            );
            require(
                balance0Adjusted.mul(balance1Adjusted) >=
                    uint256(_reserve0).mul(_reserve1).mul(10000**2),
                "Wigoswap: 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
        );
    }
}

contract WigoswapFactory is IWigoswapFactory {
    bytes32 public constant INIT_CODE_PAIR_HASH =
        keccak256(abi.encodePacked(type(WigoswapPair).creationCode));
    address public override feeTo;
    address public override feeToSetter;

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

    event SetFeeTo(address indexed sender, address indexed feeTo);
    event SetFeeToSetter(address indexed sender, address indexed feeToSetter);

    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    constructor(address _feeToSetter) public {
        feeToSetter = _feeToSetter;
    }

    function allPairsLength() external view override returns (uint256) {
        return allPairs.length;
    }

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

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

    function setFeeToSetter(address _feeToSetter) external override {
        require(msg.sender == feeToSetter, "Wigoswap: FORBIDDEN");
        feeToSetter = _feeToSetter;
        emit SetFeeToSetter(msg.sender, _feeToSetter);
    }
}

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"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"address","name":"feeTo","type":"address"}],"name":"SetFeeTo","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"address","name":"feeToSetter","type":"address"}],"name":"SetFeeToSetter","type":"event"},{"inputs":[],"name":"INIT_CODE_PAIR_HASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"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":"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"}]

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

00000000000000000000000061e468f685392948504da7a49463fd508ec1e2cd

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0x61e468f685392948504da7a49463fd508ec1e2cd

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000061e468f685392948504da7a49463fd508ec1e2cd


Deployed ByteCode Sourcemap

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Swarm Source

ipfs://86718f33e5f838d3328bbee6165ff0249c85f28b5dc57cc1e07971458bff45e5
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Validator ID :
0 FTM

Amount Staked
0

Amount Delegated
0

Staking Total
0

Staking Start Epoch
0

Staking Start Time
0

Proof of Importance
0

Origination Score
0

Validation Score
0

Active
0

Online
0

Downtime
0 s
Address Amount claimed Rewards Created On Epoch Created On
Block Uncle Number Difficulty Gas Used Reward
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