Contract 0x1ed37e4323e429c3fbc28461c14a181cd20fc4e8

Txn Hash Method
Block
From
To
Value [Txn Fee]
0x0959a505b862211aac498458dfcdd64165ea1bd9899c309a17825ba16dbd10a9Create Pair51767952022-10-20 12:31:48102 days 18 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.658969165812 4,894.773519496
0xbf814b4332ae7f3a8cfd0a933051de87e62d25dd35c10d65111d222f20d7ffdbCreate Pair51002382022-10-15 11:26:25107 days 19 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.665978736945 4,898.29589854
0x8e1dbb7189ab5a761784adb3f859d8ee4a8e22f9b4bc3333ac990f6b61d17fceCreate Pair51002342022-10-15 11:26:02107 days 19 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.665979096911 4,898.296080955
0x719775322b43eb91ab045c0b9958569625a8635c3b37095a84b5ed409780439eCreate Pair47498012022-09-22 10:27:10130 days 20 hrs ago0x76e883d43c63718d40052a3749a43ae9002b35f0 IN  Stronghands Money: Swap Factory0 CRO9.697703107006 4,914.372423844
0x05856cfb21743cb56854bbce83f2947d0c1e1e740a7bce0f4d796207dc923265Create Pair47497972022-09-22 10:26:47130 days 20 hrs ago0x76e883d43c63718d40052a3749a43ae9002b35f0 IN  Stronghands Money: Swap Factory0 CRO9.697703468483 4,914.372607025
0x86db2669435414b81e03622db6b8bd44f4623601d0ea229e9a7b06e7b1d25ce6Create Pair36092792022-07-09 12:20:18205 days 19 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.800616013146 4,966.524190341
0x6f48c9ba94004a5746959361766fedbf6022076aca31a38bf05e1e0ce3e37b5aCreate Pair36092682022-07-09 12:19:11205 days 19 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.800616853143 4,966.524616015
0x5331666580f8240b9e203b41353522fd76ce7c8f5f630ba952e5c1397b83b70cCreate Pair36092452022-07-09 12:17:01205 days 19 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.800618765416 4,966.525585071
0xab904a51192b369317ca56be6b57d311d7dbd0242ec7e5af62541062187e5fb1Create Pair36092332022-07-09 12:15:53205 days 19 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.800609837215 4,966.526094286
0x7e1298f1881964432911a8d499833ed611b1d89ece05994483edad3fa8252df8Create Pair34582562022-06-29 13:23:19215 days 17 hrs ago0x76e883d43c63718d40052a3749a43ae9002b35f0 IN  Stronghands Money: Swap Factory0 CRO9.81287954853 4,972.79929445
0x53c4bb725323182bb167a7bf265bb281d1e5d1fe57970cf96766e66b076fbb14Create Pair34582522022-06-29 13:22:57215 days 18 hrs ago0x76e883d43c63718d40052a3749a43ae9002b35f0 IN  Stronghands Money: Swap Factory0 CRO9.813048953744 4,972.799461698
0xf47bed24b89a337970675bf710d8e553a64270ad93e49fe5046588519c65ee02Create Pair33455772022-06-22 3:14:37223 days 4 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.822132603115 4,977.402635178
0xb1718288424dab03e34514e83005127b2f65fc1068e321a550924ce47b447064Create Pair33289312022-06-21 0:59:56224 days 6 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.823458849622 4,978.099942292
0x0da2787e177d448d44a9d43ca25816ae76417dd90f1b82f7aa4f540ad1e1fa85Create Pair33289062022-06-21 0:57:34224 days 6 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.823460981726 4,978.101022749
0x3f6e7ca8ee9195eeedab4e188ea762966e0304d713933a4af80f9b7aa90108aeCreate Pair33194772022-06-20 10:05:01224 days 21 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.824266988427 4,978.484242962
0x795a6dc4a88f18d21fb37c178b2ab2ffea0db32d4631041d200c06d017a067a6Create Pair32900052022-06-18 11:34:04226 days 19 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.82653575075 4,979.689463281
0x07689645a3496bce5bad53b73cdd250c11998f078648a08fa16c45efc29aa636Create Pair32900012022-06-18 11:33:42226 days 19 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO9.826585867326 4,979.689625282
0x87c425e4c13847011ed9bc50463b103b1cecfc77d8673706a88d0948d9947526Set Fee To28370322022-05-19 11:58:26256 days 19 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Stronghands Money: Swap Factory0 CRO0.238351581283 4,996.993255276
0xd76b9f12cec451fec6953fc6a7ff4b8253386d793c531f6c393158c688833b620x6080604027611162022-05-14 10:20:53261 days 21 hrs ago0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2 IN  Create: SwapFactory0 CRO11.967662202334 5,001.269242594
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x690f3ec1cde472b72a42d9aae6c1904b486d41a0ddb7d8a5eb88cc908171dd5c65604862023-01-19 7:43:5411 days 23 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x88c3c0c96f7138f48b6ca63afb1aef91f8578facabe74346e7171aba87e68c9d54766862022-11-09 5:13:0983 days 2 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0xbac51d0f287d21e31480e3ced9859bbbc9948531da03308994b35fb28676380654766772022-11-09 5:12:1883 days 2 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0xbac51d0f287d21e31480e3ced9859bbbc9948531da03308994b35fb28676380654766772022-11-09 5:12:1883 days 2 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x9762faac61fa4b0eb2e34c390b9bd751414a2f896a3dd61c1cb12238764deed754509672022-11-07 12:30:1184 days 18 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x9762faac61fa4b0eb2e34c390b9bd751414a2f896a3dd61c1cb12238764deed754509672022-11-07 12:30:1184 days 18 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x795da69332b5c557bdf68f0dc8e1c95c132f424956e0fe84a84ffd060be6816e54509652022-11-07 12:30:0084 days 18 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x795da69332b5c557bdf68f0dc8e1c95c132f424956e0fe84a84ffd060be6816e54509652022-11-07 12:30:0084 days 18 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x03eb416ab12cc6b325ec98e580925524359b1a11e1fcff58d74fd3f984cc39a154505672022-11-07 11:52:2084 days 19 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x03eb416ab12cc6b325ec98e580925524359b1a11e1fcff58d74fd3f984cc39a154505672022-11-07 11:52:2084 days 19 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0xf84c66d269fdf4995674dc3d8dca85f0b55ca3c8e3928cdd6460b63abc89ba6d54502462022-11-07 11:22:0284 days 20 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0xf84c66d269fdf4995674dc3d8dca85f0b55ca3c8e3928cdd6460b63abc89ba6d54502462022-11-07 11:22:0284 days 20 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x0959a505b862211aac498458dfcdd64165ea1bd9899c309a17825ba16dbd10a951767952022-10-20 12:31:48102 days 18 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0xbf814b4332ae7f3a8cfd0a933051de87e62d25dd35c10d65111d222f20d7ffdb51002382022-10-15 11:26:25107 days 19 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x8e1dbb7189ab5a761784adb3f859d8ee4a8e22f9b4bc3333ac990f6b61d17fce51002342022-10-15 11:26:02107 days 19 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x719775322b43eb91ab045c0b9958569625a8635c3b37095a84b5ed409780439e47498012022-09-22 10:27:10130 days 20 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x05856cfb21743cb56854bbce83f2947d0c1e1e740a7bce0f4d796207dc92326547497972022-09-22 10:26:47130 days 20 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0xa844e2e19cd96f9c21dffe37978a1d9079ba7825e745bde316bfc4437ea88f5645786472022-09-11 4:47:53142 days 2 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x4c612dd636f6e8f4638e3545102293ce06f2dcfc5cb71cc813b925ca9e20a9a245786092022-09-11 4:44:18142 days 2 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0xa846f7cd05033e4e786cef05d7ccbd39ed7abcecb05de7fb52420b90778134f138678212022-07-26 13:19:05188 days 18 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x86db2669435414b81e03622db6b8bd44f4623601d0ea229e9a7b06e7b1d25ce636092792022-07-09 12:20:18205 days 19 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x6f48c9ba94004a5746959361766fedbf6022076aca31a38bf05e1e0ce3e37b5a36092682022-07-09 12:19:11205 days 19 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x5331666580f8240b9e203b41353522fd76ce7c8f5f630ba952e5c1397b83b70c36092452022-07-09 12:17:01205 days 19 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0xab904a51192b369317ca56be6b57d311d7dbd0242ec7e5af62541062187e5fb136092332022-07-09 12:15:53205 days 19 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
0x6e37fe289f05f2868d7f1b77bf9fdfbceb9fce25f56f35a9a5b75d067e39c67735542892022-07-05 21:21:41209 days 10 hrs ago Stronghands Money: Swap Factory  Contract Creation0 CRO
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Contract Source Code Verified (Exact Match)

Contract Name:
SwapFactory

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 50 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at cronoscan.com on 2022-05-14
*/

pragma solidity =0.5.16;

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;
        }
    }
}

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

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

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

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, 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);
}

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

interface ISwapFactory {
    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;
}

interface ISwapPair {
    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;
}

interface ISwapERC20 {
    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;
}

contract SwapERC20 is ISwapERC20 {
    using SafeMath for uint;

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

contract SwapPair is ISwapPair, SwapERC20 {
    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, 'Swap: 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))), 'Swap: 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, 'Swap: 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), 'Swap: 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 = ISwapFactory(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(3).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 = IERC20(token0).balanceOf(address(this));
        uint balance1 = IERC20(token1).balanceOf(address(this));
        uint amount0 = balance0.sub(_reserve0);
        uint amount1 = balance1.sub(_reserve1);

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        if (_totalSupply == 0) {
            liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
           _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
        } else {
            liquidity = Math.min(amount0.mul(_totalSupply) / _reserve0, amount1.mul(_totalSupply) / _reserve1);
        }
        require(liquidity > 0, 'Swap: INSUFFICIENT_LIQUIDITY_MINTED');
        _mint(to, liquidity);

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Mint(msg.sender, amount0, amount1);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function burn(address to) external lock returns (uint amount0, uint amount1) {
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        address _token0 = token0;                                // gas savings
        address _token1 = token1;                                // gas savings
        uint balance0 = IERC20(_token0).balanceOf(address(this));
        uint balance1 = IERC20(_token1).balanceOf(address(this));
        uint liquidity = balanceOf[address(this)];

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
        amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
        require(amount0 > 0 && amount1 > 0, 'Swap: INSUFFICIENT_LIQUIDITY_BURNED');
        _burn(address(this), liquidity);
        _safeTransfer(_token0, to, amount0);
        _safeTransfer(_token1, to, amount1);
        balance0 = IERC20(_token0).balanceOf(address(this));
        balance1 = IERC20(_token1).balanceOf(address(this));

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Burn(msg.sender, amount0, amount1, to);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external lock {
        require(amount0Out > 0 || amount1Out > 0, 'Swap: INSUFFICIENT_OUTPUT_AMOUNT');
        (uint112 _reserve0, uint112 _reserve1,) = getReserves(); // gas savings
        require(amount0Out < _reserve0 && amount1Out < _reserve1, 'Swap: 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, 'Swap: 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) ISwapCallee(to).swapCall(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, 'Swap: INSUFFICIENT_INPUT_AMOUNT');
        { // scope for reserve{0,1}Adjusted, avoids stack too deep errors
        uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(2));
        uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(2));
        require(balance0Adjusted.mul(balance1Adjusted) >= uint(_reserve0).mul(_reserve1).mul(1000**2), 'Swap: 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 SwapFactory is ISwapFactory {
    bytes32 public constant INIT_CODE_PAIR_HASH = keccak256(abi.encodePacked(type(SwapPair).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, 'Swap: IDENTICAL_ADDRESSES');
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'Swap: ZERO_ADDRESS');
        require(getPair[token0][token1] == address(0), 'Swap: PAIR_EXISTS'); // single check is sufficient
        bytes memory bytecode = type(SwapPair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        ISwapPair(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, 'Swap: FORBIDDEN');
        feeTo = _feeTo;
    }

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

Contract ABI

[{"inputs":[{"internalType":"address","name":"_feeToSetter","type":"address"}],"payable":false,"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"},{"constant":true,"inputs":[],"name":"INIT_CODE_PAIR_HASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"allPairs","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"allPairsLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"}],"name":"createPair","outputs":[{"internalType":"address","name":"pair","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"feeTo","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"feeToSetter","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"getPair","outputs":[{"internalType":"address","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_feeTo","type":"address"}],"name":"setFeeTo","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"_feeToSetter","type":"address"}],"name":"setFeeToSetter","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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

0000000000000000000000004d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0x4d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000004d0df886f42baf7aeb22b66e5f4b6d46f6ef81f2


Deployed ByteCode Sourcemap

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Swarm Source

bzzr://b2dd3b736465a438a38c7ae806427139b39322bcce0f10bac2ba825fba1576d5
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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