Contract 0x73A48f8f521EB31c55c0e1274dB0898dE599Cb11

Txn Hash Method
Block
From
To
Value [Txn Fee]
0xbe5020693322d2af22443d3dbdb2c6617eb5b0c3c140343d8b5133e2940f4e68Create Pair32759292022-06-17 13:18:4414 days 12 hrs ago0xf469e3809baefa69ec0325b4e4184f2557471d4d IN  CronaSwap: Factory0 CRO10.170366142076 4,980.256536205
0x1ed4dbc94140ffafe8103f2ed070933200e750bf53a14fe432fba4f07972046eCreate Pair32757962022-06-17 13:06:0614 days 12 hrs ago0xf469e3809baefa69ec0325b4e4184f2557471d4d IN  CronaSwap: Factory0 CRO10.170426544221 4,980.261726615
0xf296e2bff10eac16491c0d4e9d45c69ff84776692f0ecc429d12d136dd515428Create Pair32757522022-06-17 13:01:5414 days 13 hrs ago0xf469e3809baefa69ec0325b4e4184f2557471d4d IN  CronaSwap: Factory0 CRO10.170429701517 4,980.263272682
0xa22004663accc62252f0f1e35b82de3a79aa6bd0fd621573489cf7e2b13c8331Create Pair32644572022-06-16 19:12:0915 days 6 hrs ago0xf469e3809baefa69ec0325b4e4184f2557471d4d IN  CronaSwap: Factory0 CRO10.171314137461 4,980.720753535
0x9e48933bc9bc373560450cfbe34c10751bea00cc70c1b9f990cc8347ad90e5b8Create Pair32632352022-06-16 17:16:0915 days 8 hrs ago0xf469e3809baefa69ec0325b4e4184f2557471d4d IN  CronaSwap: Factory0 CRO10.171461971903 4,980.768755581
0xb04cfda9152cb31f43aea7f71847248380ec90031284fe32a258bd9b09a7543fCreate Pair28150432022-05-18 0:48:2245 days 1 hr agoUtilityCRO: Deployer IN  CronaSwap: Factory0 CRO10.204305097413 4,996.851400714
0x5349630bbb23a1c154ec31e948a4374abd75fc20e903e0ac4f054f015efde1beSet Fee To27270072022-05-12 3:14:3550 days 22 hrs agoCronaSwap: Deployer IN  CronaSwap: Factory0 CRO0.1631478252740
0x82b063dbf3314d7600b684b414f2675956323e603cb97237ba8c125121e5601aSet Fee To22805352022-04-10 6:47:3582 days 19 hrs agoCronaSwap: Deployer IN  CronaSwap: Factory0 CRO0.1631650
0xf4ed26b230022e9578c75d956f36a7bc38a49dce427b273f8ab944e53079f9e6Create Pair22291972022-04-06 11:34:0686 days 14 hrs agoCronaSwap: Deployer IN  CronaSwap: Factory0 CRO10.2106250
0x4fd7ec836c496580e9a3853e745aa14905998b05f19614e7cc1f8005277b5a8dCreate Pair22268812022-04-06 7:42:1686 days 18 hrs agoCronaSwap: Deployer IN  CronaSwap: Factory0 CRO10.2106850
0xd5dcbf4aade07bdabe5836b53e6f8456950ad92f37e119a8eb687dc2fa8f65f9Create Pair21773982022-04-02 16:18:3590 days 9 hrs ago0xf2ae8f7e26de20d85dcdf4a740db837e93a17b44 IN  CronaSwap: Factory0 CRO10.2106850
0x88e99d776c3e4413cee5d084a310a9eae4bc49fed373fdbc3dd577344b099f30Create Pair21773622022-04-02 16:14:5490 days 9 hrs ago0xf2ae8f7e26de20d85dcdf4a740db837e93a17b44 IN  CronaSwap: Factory0 CRO10.2107350
0x69f46cd30c6ac4e6eb71d0b021b571f96c8fc89e486030938b6c4340ea3a364cSet Fee To20546952022-03-25 4:14:1898 days 21 hrs agoCronaSwap: Deployer IN  CronaSwap: Factory0 CRO0.1631650
0xa7f12e67fe5ea6c62de5840f1dacbe62a26062d212fddbcde0477ba42bd250c4Set Fee To15137282022-02-16 14:36:12135 days 11 hrs agoCronaSwap: Deployer IN  CronaSwap: Factory0 CRO0.1631650
0xeed5f93e8cf983e033db1edd741183538ba62750d610a609e4cc76c4ff5f2243Create Pair11672302022-01-24 7:40:18158 days 18 hrs ago0xfee202cf98c1f47cf23975689880afd5b8e7073d IN  CronaSwap: Factory0 CRO10.2107350
0x8265f3018f815daf0f9c93b1b3e8e9079f0986c118856a18971118bd4aa708cdCreate Pair11671822022-01-24 7:35:43158 days 18 hrs ago0xfee202cf98c1f47cf23975689880afd5b8e7073d IN  CronaSwap: Factory0 CRO5.5514350
0xc1720dcb1f6e56bb18543727d17551d5b87df486d0879c599328fee7612337b1Create Pair11065452022-01-20 6:27:07162 days 19 hrs ago0xfee202cf98c1f47cf23975689880afd5b8e7073d IN  CronaSwap: Factory0 CRO10.2106850
0x98c0d0623f4be94013f633f0b9f8eb3130f4597f33744457beb5efe9538fa52fHarvest10089282022-01-13 17:45:57169 days 8 hrs ago0x91ec0a80538dae8eb74faa2ddde84e69b34e2bc3 IN  CronaSwap: Factory0 CRO0.1062850
0xaf39452119d0e9f183c73832a649184aeb9e8f15f90e65439acab426db0193deHarvest10088962022-01-13 17:42:52169 days 8 hrs ago0x91ec0a80538dae8eb74faa2ddde84e69b34e2bc3 IN  CronaSwap: Factory0 CRO0.1062850
0xf2bc8d80d080c5b8980202d71915fdb078887b907f2cdeab3d0b6ef1524617a2Create Pair8467102022-01-02 21:31:52180 days 4 hrs ago0xd20b976584bf506baf5cc604d1f0a1b8d07138da IN  CronaSwap: Factory0 CRO11.23175350
0x17b45a024f0e32b1511c0ed514fa9b4426345c5bbc737fc6ca9a7b024199a7f2Create Pair8108882021-12-31 12:06:34182 days 13 hrs ago0x0b92097e4c9504c578120b39ac45286191f01244 IN  CronaSwap: Factory0 CRO10.2107350
0x1c1993f07b40e0f07454fa247828e397ddc18b0ecb78105bd1f6fe9e3f8b9587Create Pair8108662021-12-31 12:04:26182 days 13 hrs ago0x0b92097e4c9504c578120b39ac45286191f01244 IN  CronaSwap: Factory0 CRO10.2107350
0xfd8559634802d1bb4093a5826f27cbc989f6ad9fd3363aabd6ffa1e722bdaf1dCreate Pair7852462021-12-29 19:00:25184 days 7 hrs ago0x4b0478f3ff88dd41ade08a6e8c4f84786b88219c IN  CronaSwap: Factory0 CRO10.2107350
0xfc4322cc69bea8b0992a5c50803a89cfc977cc90a613924d4436026090c4bc45Create Pair7852252021-12-29 18:58:22184 days 7 hrs ago0x4b0478f3ff88dd41ade08a6e8c4f84786b88219c IN  CronaSwap: Factory0 CRO10.2107350
0x562dc2718bf7c7c6de36755ff82c30f2c23b8a1ae08e909df0caf054029c3658Create Pair4513002021-12-07 10:53:24206 days 15 hrs ago0x2c7ffee9525f09c6b530ebd0f8b2584c5bafd37c IN  CronaSwap: Factory0 CRO10.210735
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Latest 25 internal transaction
Parent Txn Hash Block From To Value
0x03ed16dd81f2e078913e697d26c87e72657b7fea547d0f1613da0c2e853aeeb034852382022-07-01 8:04:0217 hrs 58 mins ago CronaSwap: Factory  Contract Creation0 CRO
0x1c771f21ea485be17525517d8d17e4877c88f687530af38c5040a4095dde8b9134802242022-07-01 0:08:431 day 1 hr ago CronaSwap: Factory  Contract Creation0 CRO
0xff44d7fd1088dff351dc7cad24a5468055be8de282883860410272ea48892b7a33933142022-06-25 6:45:176 days 19 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x49d65c519a6546467e3c2adc5fa16779864e2607af83a07b12a2f932c8a5107c33464532022-06-22 4:37:289 days 21 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x229e1e1a18e244a39be69f778bfa31013cb0c97e1c3a7ad954651d9729599b9a33280282022-06-20 23:34:3511 days 2 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0xbe5020693322d2af22443d3dbdb2c6617eb5b0c3c140343d8b5133e2940f4e6832759292022-06-17 13:18:4414 days 12 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x1ed4dbc94140ffafe8103f2ed070933200e750bf53a14fe432fba4f07972046e32757962022-06-17 13:06:0614 days 12 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0xf296e2bff10eac16491c0d4e9d45c69ff84776692f0ecc429d12d136dd51542832757522022-06-17 13:01:5414 days 13 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x5bf97753af2f4fd0fc907f21a6b54eae5a41f978c5cc4e83ed1045b64dedbab732654182022-06-16 20:43:1915 days 5 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0xa22004663accc62252f0f1e35b82de3a79aa6bd0fd621573489cf7e2b13c833132644572022-06-16 19:12:0915 days 6 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x9e48933bc9bc373560450cfbe34c10751bea00cc70c1b9f990cc8347ad90e5b832632352022-06-16 17:16:0915 days 8 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0xf16566c26548d0f20f50f2e0d77197279a9a384244b46b6c497ca847a66888c732415852022-06-15 6:58:5516 days 19 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x89a87d874233ab4a047714d744c9095e0f4b817017d8035f97128e7315c1d0b932206312022-06-13 21:50:4518 days 4 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x1829aef2727c61b99b6e2e8172dca7a37550dc87b4f50e4fcb44c5e701f94f1c32163572022-06-13 15:02:5818 days 10 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x7d21a0f5fc60e96988c241383018509b7824996d12759b05fb93f4b9e2ca8c7332019212022-06-12 16:09:0819 days 9 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x3ff867285ba6fd19dd7e3d51450d1b2514014aa289ed88f84bc8f2075538dcaa31878792022-06-11 18:00:2220 days 8 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x96a0ea632b28534907e4b44ff6ba4e42a665cd4d7fa63eadfd941b4c435a823531823342022-06-11 9:10:5320 days 16 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x5d8744dae367ff3669339cbf353f5b2f572799d6ff2a8651f1c632957b2d00e731822612022-06-11 9:03:5020 days 16 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0xca03d4c2dd0df2cc0c48f8f0140a808950795d967be780755214403a1495b55631406742022-06-08 15:16:4023 days 10 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0xc609779838ebfcd588232e52c02524e4b2aab0ba1777e498b51309339eb932cc31273492022-06-07 18:07:5924 days 7 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x3fe8c3606f7272e4fbbb9e2005af4a9ad82d8edf666dc7e56ca135e7a25dd9f631270942022-06-07 17:43:3524 days 8 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x7337921ae71245af469b76261b35d5cece8e03f8230e49192c78b54ad579c13e30654422022-06-03 16:16:0628 days 9 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0x7a2cbb1e7442a7493ce136733def24d91837df92b917fcb5b3970813be68591d30648812022-06-03 15:22:3728 days 10 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0xf04a6004e649b040a80c3d783cdbd941f6707f2792fe6aa2777ddfba85b454c030647892022-06-03 15:13:4928 days 10 hrs ago CronaSwap: Factory  Contract Creation0 CRO
0xb2d66d79a0a5bd2d9e777c8fbc2f4c9071d7f468aeafb0b427d5862213230f3b30512892022-06-02 17:53:2329 days 8 hrs ago CronaSwap: Factory  Contract Creation0 CRO
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Contract Source Code Verified (Exact Match)

Contract Name:
CronaSwapFactory

Compiler Version
v0.5.16+commit.9c3226ce

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at cronoscan.com on 2022-01-08
*/

// Dependency file: contracts/libraries/SafeMath.sol

// SPDX-License-Identifier: MIT
// pragma solidity >=0.5.16;

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

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

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

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


// Dependency file: contracts/interfaces/ICronaSwapERC20.sol

// pragma solidity >=0.5.0;

interface ICronaSwapERC20 {
    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;
}


// Dependency file: contracts/swap/CronaSwapERC20.sol

// pragma solidity =0.5.16;

// import 'contracts/libraries/SafeMath.sol';
// import 'contracts/interfaces/ICronaSwapERC20.sol';

contract CronaSwapERC20 is ICronaSwapERC20 {
    using SafeMath for uint;

    string public constant name = 'Crona LPs';
    string public constant symbol = 'Crona-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, 'CronaSwapERC20: 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, 'CronaSwapERC20: INVALID_SIGNATURE');
        _approve(owner, spender, value);
    }
}


// Dependency file: contracts/libraries/Math.sol

// pragma solidity =0.5.16;

// a library for performing various math operations

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

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


// Dependency 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);
}


// Dependency file: contracts/libraries/UQ112x112.sol

// pragma solidity =0.5.16;

// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))

// range: [0, 2**112 - 1]
// resolution: 1 / 2**112

library UQ112x112 {
    uint224 constant Q112 = 2**112;

    // encode a uint112 as a UQ112x112
    function encode(uint112 y) internal pure returns (uint224 z) {
        z = uint224(y) * Q112; // never overflows
    }

    // divide a UQ112x112 by a uint112, returning a UQ112x112
    function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
        z = x / uint224(y);
    }
}


// Dependency file: contracts/interfaces/ICronaSwapPair.sol

// pragma solidity >=0.5.0;

interface ICronaSwapPair {
    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;
}


// Dependency file: contracts/interfaces/ICronaSwapFactory.sol

// pragma solidity >=0.5.0;

interface ICronaSwapFactory {
    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;
}

// Dependency file: contracts/interfaces/ICronaSwapCallee.sol

// pragma solidity >=0.5.0;

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


// Dependency file: contracts/swap/CronaSwapPair.sol

// pragma solidity =0.5.16;

// import 'contracts/swap/CronaSwapERC20.sol';
// import 'contracts/libraries/Math.sol';
// import 'contracts/interfaces/IERC20.sol';
// import 'contracts/libraries/UQ112x112.sol';
// import 'contracts/interfaces/ICronaSwapPair.sol';
// import 'contracts/interfaces/ICronaSwapFactory.sol';
// import 'contracts/interfaces/ICronaSwapCallee.sol';

contract CronaSwapPair is ICronaSwapPair, CronaSwapERC20 {
    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, 'CronaSwapPair: 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))), 'CronaSwapPair: 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, 'CronaSwapPair: 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), 'CronaSwapPair: OVERFLOW');
        uint32 blockTimestamp = uint32(block.timestamp % 2**32);
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
        if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
            // * never overflows, and + overflow is desired
            price0CumulativeLast += uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) * timeElapsed;
            price1CumulativeLast += uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) * timeElapsed;
        }
        reserve0 = uint112(balance0);
        reserve1 = uint112(balance1);
        blockTimestampLast = blockTimestamp;
        emit Sync(reserve0, reserve1);
    }

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

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

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


// Root file: contracts/swap/CronaSwapFactory.sol

pragma solidity =0.5.16;

// import 'contracts/swap/CronaSwapPair.sol';
// import 'contracts/interfaces/ICronaSwapFactory.sol';

contract CronaSwapFactory is ICronaSwapFactory {
    bytes32 public constant INIT_CODE_PAIR_HASH = keccak256(abi.encodePacked(type(CronaSwapPair).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, 'CronaSwapFactory: IDENTICAL_ADDRESSES');
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0), 'CronaSwapFactory: ZERO_ADDRESS');
        require(getPair[token0][token1] == address(0), 'CronaSwapFactory: PAIR_EXISTS'); // single check is sufficient
        bytes memory bytecode = type(CronaSwapPair).creationCode;
        bytes32 salt = keccak256(abi.encodePacked(token0, token1));
        assembly {
            pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
        }
        ICronaSwapPair(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, 'CronaSwapFactory: FORBIDDEN');
        feeTo = _feeTo;
    }

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

Contract ABI

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

000000000000000000000000b6e6d031db616cf8ac338293dc2ecfa0f01c55ec

-----Decoded View---------------
Arg [0] : _feeToSetter (address): 0xb6e6d031db616cf8ac338293dc2ecfa0f01c55ec

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000b6e6d031db616cf8ac338293dc2ecfa0f01c55ec


Deployed ByteCode Sourcemap

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Swarm Source

bzzr://3bf6bca3d5d033f141136654d243831340720a85779db7dad1248f954c57e904
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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