Contract 0x5b7592997ef6dc590cb104147e28b174923f72de 3

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0x15818f59b3740cbba0e13c21f5bbf5ade06dc2fda5a6bee38cd08b2d72d94a3cSet Fee To Sette...85554992021-05-04 19:37:23165 days 13 hrs ago0x9793dd93d46f153a2a879165cd163a01b54d8a00 IN  0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB0.00028339
0x838b05334d571cee475ec58a98838f4bc6998f6a36ec3fe1e0ac592ed708c79eSet Fee To85553862021-05-04 19:31:44165 days 13 hrs ago0x9793dd93d46f153a2a879165cd163a01b54d8a00 IN  0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB0.0004336
0x5c95b6b51e97b5185832b9113b033cd549c2db9eee0b0bee82a3c5c7c2d1f2de0x6080604085523122021-05-04 16:58:02165 days 16 hrs ago0x9793dd93d46f153a2a879165cd163a01b54d8a00 IN  Contract Creation0 BNB0.03277495
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0x58c8c8f7c8b86a4aa877d0e0b3b38d44de6430d38115a3d8e1ce8019d6cea205132433382021-10-15 9:57:021 day 23 hrs ago 0x8a2bd582f39a7f5b8e352affb9314a977abb8f01 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x58c8c8f7c8b86a4aa877d0e0b3b38d44de6430d38115a3d8e1ce8019d6cea205132433382021-10-15 9:57:021 day 23 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
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0xde10170fa5e4ecf556be1fe3d8fc251b8eb73937d11a2ffa7754d774996b5e68132428952021-10-15 9:34:531 day 23 hrs ago 0x6f37c21907727d4ba1849fc93f8b8d2b77c4e429 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0xde10170fa5e4ecf556be1fe3d8fc251b8eb73937d11a2ffa7754d774996b5e68132428952021-10-15 9:34:531 day 23 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x7b9da9b48bd58b9275c2e9c78a6137b402cbc7c8acc929890ebc3158f93da61a132373572021-10-15 4:57:592 days 4 hrs ago 0x6f37c21907727d4ba1849fc93f8b8d2b77c4e429 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x7b9da9b48bd58b9275c2e9c78a6137b402cbc7c8acc929890ebc3158f93da61a132373572021-10-15 4:57:592 days 4 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x30785912d0eedb25b07c88733f61c2d3d047ff71e079a3735204ee258fe724fe132373342021-10-15 4:56:502 days 4 hrs ago 0xace3170c37f69f28de8568f2bac8b75cc1b37adc 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x30785912d0eedb25b07c88733f61c2d3d047ff71e079a3735204ee258fe724fe132373342021-10-15 4:56:502 days 4 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0xb31b931aa4ae2fac0a7a597362c8c1921c97da2dc36d080d85fb36c0aa952a11132373192021-10-15 4:56:052 days 4 hrs ago 0xace3170c37f69f28de8568f2bac8b75cc1b37adc 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0xb31b931aa4ae2fac0a7a597362c8c1921c97da2dc36d080d85fb36c0aa952a11132373192021-10-15 4:56:052 days 4 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x8b63fb5de2689766063db293db3c029c9bf45294354d927fc4a8133e7595aa39132368232021-10-15 4:31:172 days 4 hrs ago 0xc69ab9f30492e8921d617c137a21c8d36093ec20 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x8b63fb5de2689766063db293db3c029c9bf45294354d927fc4a8133e7595aa39132368232021-10-15 4:31:172 days 4 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x0a220aaa8982ea50ee8a0ba1ac8acb116c453fe90f8bb4e1147e22cd09cccc8b132218132021-10-14 16:00:472 days 17 hrs ago 0x1610aace90ae577bc7d96844ec7138c295db204f 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x0a220aaa8982ea50ee8a0ba1ac8acb116c453fe90f8bb4e1147e22cd09cccc8b132218132021-10-14 16:00:472 days 17 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x6b933a8054b33273e6ef100339a27258c9998305bb55b7ab4781bca2c782482d131938532021-10-13 16:13:043 days 16 hrs ago 0x5c8c8e59050e39d2bd8f4ee5b68f33541362b2ac 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x6b933a8054b33273e6ef100339a27258c9998305bb55b7ab4781bca2c782482d131938532021-10-13 16:13:043 days 16 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0xeb8787e447c508644b4e8985f6203f9403f9ac382796aa61e775fec23338e0dc131936552021-10-13 16:03:103 days 17 hrs ago 0xbbad69f8c727bb0d145c4677b18e8575a335cd48 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0xeb8787e447c508644b4e8985f6203f9403f9ac382796aa61e775fec23338e0dc131936552021-10-13 16:03:103 days 17 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x763be7d36624e82787c860939c3f5a3b19d9b7adfb123c11f7480c1f7fd09796131932672021-10-13 15:43:463 days 17 hrs ago 0x8a2bd582f39a7f5b8e352affb9314a977abb8f01 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x763be7d36624e82787c860939c3f5a3b19d9b7adfb123c11f7480c1f7fd09796131932672021-10-13 15:43:463 days 17 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x8c6bacba2574091c9b87e155000ee3450b5ce0dc1ffa3c557a3053a8bd0899f0131932452021-10-13 15:42:403 days 17 hrs ago 0xbbad69f8c727bb0d145c4677b18e8575a335cd48 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x8c6bacba2574091c9b87e155000ee3450b5ce0dc1ffa3c557a3053a8bd0899f0131932452021-10-13 15:42:403 days 17 hrs ago 0x354bc1cfe9959b96bed409859a726263c6c56c81 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
0x838f031dbb0d92cdaed737c0f7a69ea740f3349c5fb98ef927fb47328ba8ecb0131930712021-10-13 15:33:583 days 17 hrs ago 0xbbad69f8c727bb0d145c4677b18e8575a335cd48 0x5b7592997ef6dc590cb104147e28b174923f72de0 BNB
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Contract Source Code Verified (Exact Match)

Contract Name:
GravisFactory

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 999999 runs

Other Settings:
istanbul EvmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at BscScan.com on 2021-05-04
*/

// File: contracts/interfaces/IGravisFactory.sol

pragma solidity >=0.5.0;

interface IGravisFactory {
    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: contracts/interfaces/IGravisPair.sol

pragma solidity >=0.5.0;

interface IGravisPair {
    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: contracts/interfaces/IGravisERC20.sol

pragma solidity >=0.5.0;

interface IGravisERC20 {
    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: contracts/libraries/SafeMath.sol

pragma solidity >=0.5.0;

// 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) {
        return sub(x, y, "ds-math-sub-underflow");
    }

    function sub(uint x, uint y, string memory errorMessage) internal pure returns (uint z) {
        require((z = x - y) <= x, errorMessage);
    }

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

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }
}

// File: contracts/GravisERC20.sol

pragma solidity >=0.5.0;



contract GravisERC20 is IGravisERC20 {
    using SafeMath for uint;

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

// File: contracts/libraries/Math.sol

pragma solidity >=0.5.0;

// 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: contracts/libraries/UQ112x112.sol

pragma solidity >=0.5.0;

// 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: contracts/interfaces/IERC20.sol

pragma solidity >=0.5.0;

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

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

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

// File: contracts/interfaces/IGravisCallee.sol

pragma solidity >=0.5.0;

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

// File: contracts/GravisPair.sol

pragma solidity >=0.5.0;








contract GravisPair is IGravisPair, GravisERC20 {
    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, 'Gravis: 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))), 'Gravis: TRANSFER_FAILED');
    }

    event Mint(address indexed sender, uint amount0, uint amount1);
    event MintFee(address indexed recipient, uint amountLP);
    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, 'Gravis: 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), 'Gravis: 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 = IGravisFactory(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(address(this), liquidity);
                        emit MintFee(feeTo, liquidity);
                        _internalBurn(feeTo, false, 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
        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint balance0 = IERC20(token0).balanceOf(address(this));
        uint balance1 = IERC20(token1).balanceOf(address(this));
        uint amount0 = balance0.sub(_reserve0);
        uint amount1 = balance1.sub(_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, 'Gravis: 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) {
        return _internalBurn(to, true, 0);
    }

    // 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, 'Gravis: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Gravis: 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, 'Gravis: 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) IGravisCallee(to).gravisCall(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, 'Gravis: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
            uint balance0Adjusted = balance0.mul(10000).sub(amount0In.mul(25)); // 0,25 % to LP
            uint balance1Adjusted = balance1.mul(10000).sub(amount1In.mul(25)); // 0,25 % to LP
            require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(10000**2), 'Gravis: 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);
    }

    function _internalBurn(address to, bool _withMintFee, uint _toBurn) internal returns (uint amount0, uint amount1) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        address _token0 = token0;                                // gas savings
        address _token1 = token1;                                // gas savings
        uint liquidity;
        bool feeOn;
        if (_withMintFee) {
            feeOn = _mintFee(_reserve0, _reserve1);
            (_reserve0, _reserve1,) = getReserves();
            liquidity = balanceOf[address(this)];
        }
        if (_toBurn > 0 && _withMintFee == false) {
            feeOn = true;
            liquidity = _toBurn;
        }
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        uint balance0 = IERC20(_token0).balanceOf(address(this));
        uint balance1 = IERC20(_token1).balanceOf(address(this));
        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, 'Gravis: INSUFFICIENT_LIQUIDITY_BURNED');
        _burn(address(this), liquidity);

        require(IERC20(_token0).balanceOf(address(this)) >= amount0, "amount0");
        require(IERC20(_token1).balanceOf(address(this)) >= amount1, "amount1");

        _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);
    }
}

// File: contracts/GravisFactory.sol

pragma solidity >=0.5.0;



contract GravisFactory is IGravisFactory {
    bytes32 public constant INIT_CODE_PAIR_HASH = keccak256(abi.encodePacked(type(GravisPair).creationCode));

    address public feeTo;
    address public feeToSetter;

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

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

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

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

    function createPair(address tokenA, address tokenB) external returns (address pair) {
        require(tokenA != tokenB, 'Gravis: IDENTICAL_ADDRESSES');
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'Gravis: ZERO_ADDRESS');
        require(getPair[token0][token1] == address(0), 'Gravis: PAIR_EXISTS'); // single check is sufficient
        bytes memory bytecode = type(GravisPair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        IGravisPair(pair).initialize(token0, token1);
        getPair[token0][token1] = pair;
        getPair[token1][token0] = pair; // populate mapping in the reverse direction
        allPairs.push(pair);
        emit PairCreated(token0, token1, pair, allPairs.length);
    }

    function setFeeTo(address _feeTo) external {
        require(msg.sender == feeToSetter, 'Gravis: FORBIDDEN');
        feeTo = _feeTo;
    }

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

Contract ABI

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

0000000000000000000000009793dd93d46f153a2a879165cd163a01b54d8a00

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0x9793dd93d46f153a2a879165cd163a01b54d8a00

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000009793dd93d46f153a2a879165cd163a01b54d8a00


Deployed ByteCode Sourcemap

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Swarm Source

bzzr://67d0786ec43a74f2b224d95fc8c42d0fac9174bf4d78891c966b9860f5d33228
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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