Contract 0x5be44d6c5634161cdadcc2bc35389325aa493e83

 

Contract Overview

Balance:
0 MATIC

MATIC Value:
$0.00

Token:
 
Txn Hash
Method
Block
From
To
Value [Txn Fee]
0x2c3164e53bd631d74514aa45e0a8d8ad5936fc668890bc6c0d9d20dd710d20c3Create Pair258551782022-03-12 7:03:20373 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.11580797535 35.292805076
0x43817005382ea02983f2012bacfe09ca8781cad9355d00ad5bd7c5f92e233315Create Pair258551112022-03-12 7:01:02373 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.119816243133 36.514447196
0xde864c316eb17dc4099c24c24c97f9bbddfbc78ac724d47a14ce1e3e147cd5c0Create Pair224722522021-12-13 10:19:26462 days 18 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.1148471835
0xa3a3850e592f2d3cf91932a369469af71e0d7524e08aabab5f81ed87eda90444Create Pair220408122021-12-02 6:59:01473 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.1968802860
0x06075b87eb786d98169338af427941b96a8e2e089e423e5c4f5a8386bb8e5c63Create Pair212413962021-11-11 9:32:09494 days 19 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.164066950
0x624ee9c4498755ce345080706e008d891113f2c0268a9115b348ec0094e402d0Create Pair212413322021-11-11 9:29:57494 days 19 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.164066950
0xc28be9324779c2ff7a8624adba580ccc0fa1b4a5134d4140f6aa3af5cea71ca3Create Pair206764012021-10-27 18:30:47509 days 10 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0008083530
0x200053bd1fdae749fc73699e3b4e9d991ef16624d09ca287caae4fbc27bbd595Create Pair206715662021-10-27 15:10:28509 days 14 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.164067450
0x3eb3b840621d6169b4b2231c3e6d8a2fa4183af4ff8d9edf92a8482d08ccb491Create Pair206588252021-10-27 6:37:58509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0xda210c5fbd22ba22f1f07a0c0775c0aa81de34106de102dbed4b10d08f44b0aeCreate Pair206588142021-10-27 6:37:32509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0x5393afc056e5af087dd4d2071d60aaf86c5b5779a0535dde6e8d557a5b1b9032Create Pair206587952021-10-27 6:36:54509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0x939a013b22ed9d0b7c61e8afe776ffaa66c79842b24fd4697e5b30dfb6ca8157Create Pair206587812021-10-27 6:36:26509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0x5a328860a2ebd64cabf87c53f4937bbeb32368e207b1ca84202ff935be26d996Create Pair206587692021-10-27 6:36:02509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0x92f1db5cc07cc1357b7ada458a8ff5f44a6ded3db0b8cbfe2edafbfd34d85503Create Pair206587532021-10-27 6:35:30509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984404430
0xe1a1f7ce825243d3e02fc0c06ca347a9cd160c7020996c73833576e69d739d7eCreate Pair206587352021-10-27 6:34:18509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0x49a5801fcf3f5200c8f7dbf992ab0409a6dffa20369f8cdc5f7eaf2dccf24705Create Pair206587272021-10-27 6:33:46509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984404430
0x77cba8cc662191927b882e120b96616ca1224f048f4489d1225244d8180dd4ffCreate Pair206586972021-10-27 6:31:46509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984404430
0xcc947f1f79b795861ce65bc12c7892089e952ce0be1c825a603babfff808ca77Create Pair206585782021-10-27 6:27:20509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984404430
0x5fb9975c517a932ea8282e3148de4f17fc06ad1d076d053aec0df0717cd27703Create Pair206584752021-10-27 6:23:46509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0xab8fd7b5cf776b49bbd1858ab7d45b9ec356a1869f80daf9b9a952f114e69327Create Pair206584332021-10-27 6:22:22509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0xedb8086205685627b3ce646ec219f82c9b046ea394dfa16da3d84496e4b1abfaCreate Pair206584012021-10-27 6:21:14509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984404430
0x536764d7db49117b1128cd031f0a940d737e986e39189fba825ca2cc480849dcCreate Pair206582472021-10-27 6:15:58509 days 22 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0x5415c13445ea27769a7a6ba682c255d85e7286e8c653bf97511146b64ea99f61Create Pair206581302021-10-27 6:11:56509 days 23 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0x9d68195f57c3c663d8447f967bc73632bd8aab906aa3263fe05cc7c041b13ff3Create Pair206578352021-10-27 5:58:58509 days 23 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0984401430
0x77dcaa6bcb24069093c78f55085a4f4ae70d0bc61242ec80b5bf246f31e607bcSet Fee To206280472021-10-26 10:16:40510 days 18 hrs agoYFDAI.Finance: Deployer IN  0x5be44d6c5634161cdadcc2bc35389325aa493e830 MATIC0.0013827330
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Latest 25 internal transaction
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0x2c3164e53bd631d74514aa45e0a8d8ad5936fc668890bc6c0d9d20dd710d20c3258551782022-03-12 7:03:20373 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x43817005382ea02983f2012bacfe09ca8781cad9355d00ad5bd7c5f92e233315258551112022-03-12 7:01:02373 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x703936c312bc88ff8bf88ce46bbc96c2167b45b03a9dd2d8f22f902fc9418140246910022022-02-08 9:48:57405 days 19 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0xde864c316eb17dc4099c24c24c97f9bbddfbc78ac724d47a14ce1e3e147cd5c0224722522021-12-13 10:19:26462 days 18 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0xa3a3850e592f2d3cf91932a369469af71e0d7524e08aabab5f81ed87eda90444220408122021-12-02 6:59:01473 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x06075b87eb786d98169338af427941b96a8e2e089e423e5c4f5a8386bb8e5c63212413962021-11-11 9:32:09494 days 19 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x624ee9c4498755ce345080706e008d891113f2c0268a9115b348ec0094e402d0212413322021-11-11 9:29:57494 days 19 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x200053bd1fdae749fc73699e3b4e9d991ef16624d09ca287caae4fbc27bbd595206715662021-10-27 15:10:28509 days 14 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x3eb3b840621d6169b4b2231c3e6d8a2fa4183af4ff8d9edf92a8482d08ccb491206588252021-10-27 6:37:58509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0xda210c5fbd22ba22f1f07a0c0775c0aa81de34106de102dbed4b10d08f44b0ae206588142021-10-27 6:37:32509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x5393afc056e5af087dd4d2071d60aaf86c5b5779a0535dde6e8d557a5b1b9032206587952021-10-27 6:36:54509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x939a013b22ed9d0b7c61e8afe776ffaa66c79842b24fd4697e5b30dfb6ca8157206587812021-10-27 6:36:26509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x5a328860a2ebd64cabf87c53f4937bbeb32368e207b1ca84202ff935be26d996206587692021-10-27 6:36:02509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x92f1db5cc07cc1357b7ada458a8ff5f44a6ded3db0b8cbfe2edafbfd34d85503206587532021-10-27 6:35:30509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0xe1a1f7ce825243d3e02fc0c06ca347a9cd160c7020996c73833576e69d739d7e206587352021-10-27 6:34:18509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x49a5801fcf3f5200c8f7dbf992ab0409a6dffa20369f8cdc5f7eaf2dccf24705206587272021-10-27 6:33:46509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x77cba8cc662191927b882e120b96616ca1224f048f4489d1225244d8180dd4ff206586972021-10-27 6:31:46509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0xcc947f1f79b795861ce65bc12c7892089e952ce0be1c825a603babfff808ca77206585782021-10-27 6:27:20509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x5fb9975c517a932ea8282e3148de4f17fc06ad1d076d053aec0df0717cd27703206584752021-10-27 6:23:46509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0xab8fd7b5cf776b49bbd1858ab7d45b9ec356a1869f80daf9b9a952f114e69327206584332021-10-27 6:22:22509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0xedb8086205685627b3ce646ec219f82c9b046ea394dfa16da3d84496e4b1abfa206584012021-10-27 6:21:14509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x536764d7db49117b1128cd031f0a940d737e986e39189fba825ca2cc480849dc206582472021-10-27 6:15:58509 days 22 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x5415c13445ea27769a7a6ba682c255d85e7286e8c653bf97511146b64ea99f61206581302021-10-27 6:11:56509 days 23 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0x9d68195f57c3c663d8447f967bc73632bd8aab906aa3263fe05cc7c041b13ff3206578352021-10-27 5:58:58509 days 23 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
0xaa7441261fc042dd2ab110dee15f2253800ed6e6d4e07d45425258779d743dfc204462512021-10-21 9:14:28515 days 19 hrs ago 0x5be44d6c5634161cdadcc2bc35389325aa493e83  Contract Creation0 MATIC
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Contract Source Code Verified (Exact Match)

Contract Name:
SafeswapV2Factory

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, Unlicense license

Contract Source Code (Solidity)

/**
 *Submitted for verification at polygonscan.com on 2021-10-20
*/

//SPDX-License-Identifier: UNLICENSED
// File: contracts/safeswapv2/interfaces/ISafeswapV2Factory.sol

pragma solidity >=0.5.0;

interface ISafeswapV2Factory {
    event PairCreated(address indexed token0, address indexed token1, address pair, uint);

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

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

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

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

// File: contracts/safeswapv2/libraries/SafeMath.sol

pragma solidity =0.6.12;

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

library SafeMathSafeswap {
    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: contracts/safeswapv2/SafeswapV2ERC20.sol

pragma solidity =0.6.12;


contract SafeswapV2ERC20 {
    using SafeMathSafeswap for uint;

    string public constant name = 'Safeswap V2';
    string public constant symbol = 'SSGTx-V2';
    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, 'SafeswapV2: 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, 'SafeswapV2: INVALID_SIGNATURE');
        _approve(owner, spender, value);
    }
}

// File: contracts/safeswapv2/libraries/Math.sol

pragma solidity =0.6.12;

// 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/safeswapv2/libraries/UQ112x112.sol

pragma solidity =0.6.12;

// 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/safeswapv2/interfaces/IERC20.sol

pragma solidity >=0.5.0;

interface IERC20Safeswap {
    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/safeswapv2/interfaces/ISafeswapV2Callee.sol

pragma solidity >=0.5.0;

interface ISafeswapV2Callee {
    function safeswapV2Call(address sender, uint amount0, uint amount1, bytes calldata data) external;
}

// File: contracts/safeswapv2/SafeswapV2Pair.sol

pragma solidity =0.6.12;

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

contract SafeswapV2Pair is SafeswapV2ERC20 {
    using SafeMathSafeswap  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, 'SafeswapV2: 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))), 'SafeswapV2: 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, 'SafeswapV2: 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), 'SafeswapV2: 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 = ISafeswapV2Factory(factory).feeTo();
        feeOn = feeTo != address(0);
        uint _kLast = kLast; // gas savings
        if (feeOn) {
            if (_kLast != 0) {
                uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
                uint rootKLast = Math.sqrt(_kLast);
                if (rootK > rootKLast) {
                    uint numerator = totalSupply.mul(rootK.sub(rootKLast));
                    uint denominator = rootK.mul(5).add(rootKLast);
                    uint liquidity = numerator / denominator;
                    if (liquidity > 0) _mint(feeTo, liquidity);
                }
            }
        } else if (_kLast != 0) {
            kLast = 0;
        }
    }

    // this low-level function should be called from a contract which performs important safety checks
    function mint(address to) external lock returns (uint liquidity) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        uint balance0 = IERC20Safeswap(token0).balanceOf(address(this));
        uint balance1 = IERC20Safeswap(token1).balanceOf(address(this));
        uint amount0 = balance0.sub(_reserve0);
        uint amount1 = balance1.sub(_reserve1);

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        if (_totalSupply == 0) {
            address migrator = ISafeswapV2Factory(factory).migrator();
            if (msg.sender == migrator) {
                liquidity = IMigrator(migrator).desiredLiquidity();
                require(liquidity > 0 && liquidity != uint256(-1), "Bad desired liquidity");
            } else {
                require(migrator == address(0), "Must not have migrator");
                liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
                _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
            }
        } else {
            liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
        }
        require(liquidity > 0, 'SafeswapV2: 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 = IERC20Safeswap(_token0).balanceOf(address(this));
        uint balance1 = IERC20Safeswap(_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, 'SafeswapV2: INSUFFICIENT_LIQUIDITY_BURNED');
        _burn(address(this), liquidity);
        _safeTransfer(_token0, to, amount0);
        _safeTransfer(_token1, to, amount1);
        balance0 = IERC20Safeswap(_token0).balanceOf(address(this));
        balance1 = IERC20Safeswap(_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, 'SafeswapV2: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'SafeswapV2: 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, 'SafeswapV2: 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) ISafeswapV2Callee(to).safeswapV2Call(msg.sender, amount0Out, amount1Out, data);
        balance0 = IERC20Safeswap(_token0).balanceOf(address(this));
        balance1 = IERC20Safeswap(_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, 'SafeswapV2: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
        uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3));
        uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3));
        require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'SafeswapV2: 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, IERC20Safeswap(_token0).balanceOf(address(this)).sub(reserve0));
        _safeTransfer(_token1, to, IERC20Safeswap(_token1).balanceOf(address(this)).sub(reserve1));
    }

    // force reserves to match balances
    function sync() external lock {
        _update(IERC20Safeswap(token0).balanceOf(address(this)), IERC20Safeswap(token1).balanceOf(address(this)), reserve0, reserve1);
    }
}

contract Context {
    function _msgSender() internal view returns (address) {
        return msg.sender;
    }

    function _msgData() internal pure returns (bytes memory) {
        return msg.data;
    }
}

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Context{
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() internal {
        _setOwner(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public onlyOwner {
        _setOwner(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// File: contracts/safeswapv2/SafeswapV2Factory.sol

pragma solidity =0.6.12;

contract SafeswapV2Factory is ISafeswapV2Factory, Ownable {
    address public override feeTo;
    address public override feeToSetter;
    address public routerAddress;
    address public override migrator;

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

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

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

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

    function pairCodeHash() external pure returns (bytes32) {
        return keccak256(type(SafeswapV2Pair).creationCode);
    }
    
    function setRouterAddress(address _routerAddress) external onlyOwner {
        routerAddress = _routerAddress;
    }

    function createPair(address tokenA, address tokenB) external override returns (address pair) {
        require(_msgSender() == owner() || _msgSender() == routerAddress, "SafeSwapV2Factory:createPair::NOT AUTHORIZE");
        require(tokenA != tokenB, 'SafeswapV2: IDENTICAL_ADDRESSES');
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'SafeswapV2: ZERO_ADDRESS');
        require(getPair[token0][token1] == address(0), 'SafeswapV2: PAIR_EXISTS'); // single check is sufficient
        bytes memory bytecode = type(SafeswapV2Pair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        SafeswapV2Pair(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, 'SafeswapV2: FORBIDDEN');
        feeTo = _feeTo;
    }

    function setMigrator(address _migrator) external override {
        require(msg.sender == feeToSetter, 'SafeswapV2: FORBIDDEN');
        migrator = _migrator;
    }

    function setFeeToSetter(address _feeToSetter) external override {
        require(msg.sender == feeToSetter, 'SafeswapV2: FORBIDDEN');
        feeToSetter = _feeToSetter;
    }

}

Contract Security Audit

Contract ABI

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

00000000000000000000000048a1c4a492cc3d11aa5e780abc2e6da4e04cc190

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0x48a1c4a492cc3d11aa5e780abc2e6da4e04cc190

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000048a1c4a492cc3d11aa5e780abc2e6da4e04cc190


Deployed ByteCode Sourcemap

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Swarm Source

ipfs://ec57040b3f9703df1503e14507940d2fb01993717f17e79dea9488208b10612e
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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