Contract 0xa389f9430876455c36478deea9769b7ca4e3ddb1 1

Txn Hash Method
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Value [Txn Fee]
0xf6ff55e8a012e6df7997a4ee8d04f4011b123529f5550befb315c8ac26150aaeApprove101071762022-01-27 3:13:3210 mins ago0xd0cce280ba14b565f886863a9b1700ecfa03aabb IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0xafc97979683628d76ed374e185c2eaf106734c6517f2c266b1db9387151da5d8Approve101070282022-01-27 3:08:3015 mins ago0xd642279425d986b5a51037ced3b9df366639229d IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0xaaf236ca3b6217da90296c7a12ad7e9737218341e76daed790381a1dff6b633fApprove101057222022-01-27 2:25:4857 mins ago0x6db8b87381a3731b5e24d9b58bbcc1f96582cc87 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.001171223746 25.2125489
0xfd642ce8348f38967da6ca10e31b321252d9f4fedab07f3e7338c34598022565Approve101057022022-01-27 2:25:1158 mins ago0xa2d818280bc589d6ea2991cc8f7e0ac3ccdde044 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x6deb17e4973f1c0aa149beac2bcd7f496b4ac08793b5a0b4803d6d25246e5a9bApprove101056642022-01-27 2:24:0559 mins ago0x6db8b87381a3731b5e24d9b58bbcc1f96582cc87 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0xde4a808bf2ee2b4fc212546aad217054243369e6865e3f7c4e82018e19f4b857Approve101055602022-01-27 2:20:451 hr 2 mins ago0xddb29a6dfc0694c2fd6797e5b1eb47b17c2a9a68 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0xf384ee6133a0d4113e17834837966e37774b57f7545ae94fa27539a20611958eApprove101049362022-01-27 1:59:551 hr 23 mins ago0xd37194be2b54096321c882a3d9dc8ff0e5715ce3 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.001177858767 25.355378813
0x08b65ae28d91b723f1091d154cbc40d84b3215c3350d0c42813477d78b57abeaApprove101043852022-01-27 1:42:061 hr 41 mins ago0x4d91b4a57b50d0a52bae4a7fe8eeae652746e555 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116509791 25.080680038
0x3d62fd7235b82fb6ea57d9a6c706ef747cb8b931f50765a5909ea2c8cbb745e6Approve101041272022-01-27 1:34:041 hr 49 mins ago0x73d1d82709cc3038081ee673ea989f8f13bc3e29 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116398644925.056753981
0x1360443dabf8ba124ec1d6d0986c68ea38295049e7914bea8e4184914c45e88cApprove101039462022-01-27 1:28:171 hr 55 mins ago0x2f0de662d8f572b17695144417abd2cf35198bee IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x87fd148decb81fafaff285aca67792824d0ffac757a97182ce67e819b24f1a3dApprove101035282022-01-27 1:14:512 hrs 8 mins ago0xed9bd062f669e7047597c03902d78547a8966b19 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x7daef9f0e74ff27e6ee5417863d455ed9bca8f0c0bfb92f1520afd670dfa6384Approve101034582022-01-27 1:12:252 hrs 11 mins ago0x6519c3846f7f058a23e0613cdf79da1289c75687 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x98c0bdda6df4c2edb23bd8c0bc608c2f8fa3bc2244a7358030b79ff9ce447c7bApprove101033842022-01-27 1:10:002 hrs 13 mins ago0xecffac47852b5ade658e1c3ef5d1e280af063fc3 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00066385 25
0xfe5e544fabfd27f3447f4c7bd734c5d2f658b19bf013144e260faf3bca6f3a67Approve101033542022-01-27 1:09:022 hrs 14 mins ago0xecffac47852b5ade658e1c3ef5d1e280af063fc3 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0xcfc3e9732df8371417aa20214545acc49fcd05e4a89ab19404ca5fd94cddf952Approve101031312022-01-27 1:01:492 hrs 21 mins ago0xe70bc1db824dfd63d33b8f14b9b38f831f7da6b0 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x789fa02af69dad9c03cc2a41dfb9922ccb035a73f19983dcb44f394c8adf3ef0Approve101030152022-01-27 0:58:132 hrs 25 mins ago0x8f162a923d15d3402fa2c5bfd49fb76ca1b1c6c8 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x61c101ee631037081b00613a66455167175edc6eff449d040220c70cc971b71aApprove101023532022-01-27 0:36:562 hrs 46 mins ago0xb836f0b99e3cbe4934f6d8e65ee1c2c0caf1f2a6 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.0011613525
0x5f3c593c985c3f7ea8dcb5d22df7c06c6827f6eea24019827417a3d9e2d1e02aApprove101017272022-01-27 0:16:093 hrs 7 mins ago0xe70bc1db824dfd63d33b8f14b9b38f831f7da6b0 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x2ddb5828d17d283c7f3184f8d1c2b1b7cb055fd9e7ea706cd2b5e74c0455712eApprove101011492022-01-26 23:57:063 hrs 26 mins ago0xfa9a58c881d77cd83bf3f60a12698cbeb6a99fd9 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x10b494e45799c50c5c77777652d1363b30c868c370dae22400143c9029f33c4fApprove101010522022-01-26 23:53:493 hrs 29 mins ago0xfa9a58c881d77cd83bf3f60a12698cbeb6a99fd9 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x8800f63d26546ff0a67aa06e4908eecaee2780b08525626c6ec232da4805ebbcApprove100997612022-01-26 23:11:014 hrs 12 mins ago0x9fddbcf7e5810e985b537077c8cfa102efaa2bf5 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.000665093472 25.046828055
0x09166d197f67ac373565b618f12c82155be9ef90fcea684ddc7d16ac189c7a54Approve100997462022-01-26 23:10:374 hrs 13 mins ago0x9fddbcf7e5810e985b537077c8cfa102efaa2bf5 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x7d8138fd888d7ab1bbfeae8569336d47a2807dbd95d8a7e7f34bfde312c60eb1Approve100993382022-01-26 22:56:514 hrs 26 mins ago0x844d365570f4a7776a383487897867d630c9c853 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x84249f8505ca93c222d71d93564654767ef25b75034c59208cca83be9078d968Approve100992692022-01-26 22:54:274 hrs 29 mins ago0x58a7049694ab77d9e0b6ac36f8045e085781b480 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
0x5bf8d08273ab0581bc4c3a87e24ae42d9db0d47bfa2e95f5d6bef6020806401bApprove100990902022-01-26 22:48:154 hrs 35 mins ago0xe9bcbc030f06461f11d054e411e5df14999d7254 IN  0xa389f9430876455c36478deea9769b7ca4e3ddb10 AVAX0.00116135 25
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0x274a64589044ada0e45ee9ae77badca84272bdc54fa15c0b0ab075afbb7bad9e33452922021-08-25 6:19:37154 days 21 hrs ago 0x9ad6c38be94206ca50bb0d90783181662f0cfa10  Contract Creation0 AVAX
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x454e67025631c065d3cfad6d71e6892f74487a15

Contract Name:
JoePair

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, GNU GPLv3 license

Contract Source Code (Solidity)

/**
 *Submitted for verification at snowtrace.io on 2021-11-05
*/

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

// SPDX-License-Identifier: GPL-3.0

pragma solidity =0.6.12;

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

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

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

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

// File: contracts/traderjoe/JoeERC20.sol

pragma solidity =0.6.12;

contract JoeERC20 {
    using SafeMathJoe for uint256;

    string public constant name = "Joe LP Token";
    string public constant symbol = "JLP";
    uint8 public constant decimals = 18;
    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    bytes32 public DOMAIN_SEPARATOR;
    // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant PERMIT_TYPEHASH =
        0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
    mapping(address => uint256) public nonces;

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

    constructor() public {
        uint256 chainId;
        assembly {
            chainId := chainid()
        }
        DOMAIN_SEPARATOR = keccak256(
            abi.encode(
                keccak256(
                    "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
                ),
                keccak256(bytes(name)),
                keccak256(bytes("1")),
                chainId,
                address(this)
            )
        );
    }

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

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

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

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

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

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

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

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

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

pragma solidity =0.6.12;

// a library for performing various math operations

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

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

// File: contracts/traderjoe/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/traderjoe/interfaces/IERC20.sol

pragma solidity >=0.5.0;

interface IERC20Joe {
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
    event Transfer(address indexed from, address indexed to, uint256 value);

    function name() external view returns (string memory);

    function symbol() external view returns (string memory);

    function decimals() external view returns (uint8);

    function totalSupply() external view returns (uint256);

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

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

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

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

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

// File: contracts/traderjoe/interfaces/IJoeFactory.sol

pragma solidity >=0.5.0;

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

    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(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

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

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;

    function setMigrator(address) external;
}

// File: contracts/traderjoe/interfaces/IJoeCallee.sol

pragma solidity >=0.5.0;

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

// File: contracts/traderjoe/JoePair.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 JoePair is JoeERC20 {
    using SafeMathJoe for uint256;
    using UQ112x112 for uint224;

    uint256 public constant MINIMUM_LIQUIDITY = 10**3;
    bytes4 private constant SELECTOR =
        bytes4(keccak256(bytes("transfer(address,uint256)")));

    address public factory;
    address public token0;
    address public token1;

    uint112 private reserve0; // uses single storage slot, accessible via getReserves
    uint112 private reserve1; // uses single storage slot, accessible via getReserves
    uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves

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

    uint256 private unlocked = 1;
    modifier lock() {
        require(unlocked == 1, "Joe: LOCKED");
        unlocked = 0;
        _;
        unlocked = 1;
    }

    function getReserves()
        public
        view
        returns (
            uint112 _reserve0,
            uint112 _reserve1,
            uint32 _blockTimestampLast
        )
    {
        _reserve0 = reserve0;
        _reserve1 = reserve1;
        _blockTimestampLast = blockTimestampLast;
    }

    function _safeTransfer(
        address token,
        address to,
        uint256 value
    ) private {
        (bool success, bytes memory data) = token.call(
            abi.encodeWithSelector(SELECTOR, to, value)
        );
        require(
            success && (data.length == 0 || abi.decode(data, (bool))),
            "Joe: TRANSFER_FAILED"
        );
    }

    event Mint(address indexed sender, uint256 amount0, uint256 amount1);
    event Burn(
        address indexed sender,
        uint256 amount0,
        uint256 amount1,
        address indexed to
    );
    event Swap(
        address indexed sender,
        uint256 amount0In,
        uint256 amount1In,
        uint256 amount0Out,
        uint256 amount1Out,
        address indexed to
    );
    event Sync(uint112 reserve0, uint112 reserve1);

    constructor() public {
        factory = msg.sender;
    }

    // called once by the factory at time of deployment
    function initialize(address _token0, address _token1) external {
        require(msg.sender == factory, "Joe: FORBIDDEN"); // sufficient check
        token0 = _token0;
        token1 = _token1;
    }

    // update reserves and, on the first call per block, price accumulators
    function _update(
        uint256 balance0,
        uint256 balance1,
        uint112 _reserve0,
        uint112 _reserve1
    ) private {
        require(
            balance0 <= uint112(-1) && balance1 <= uint112(-1),
            "Joe: OVERFLOW"
        );
        uint32 blockTimestamp = uint32(block.timestamp % 2**32);
        uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
        if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
            // * never overflows, and + overflow is desired
            price0CumulativeLast +=
                uint256(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) *
                timeElapsed;
            price1CumulativeLast +=
                uint256(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) *
                timeElapsed;
        }
        reserve0 = uint112(balance0);
        reserve1 = uint112(balance1);
        blockTimestampLast = blockTimestamp;
        emit Sync(reserve0, reserve1);
    }

    // if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
    function _mintFee(uint112 _reserve0, uint112 _reserve1)
        private
        returns (bool feeOn)
    {
        address feeTo = IJoeFactory(factory).feeTo();
        feeOn = feeTo != address(0);
        uint256 _kLast = kLast; // gas savings
        if (feeOn) {
            if (_kLast != 0) {
                uint256 rootK = Math.sqrt(uint256(_reserve0).mul(_reserve1));
                uint256 rootKLast = Math.sqrt(_kLast);
                if (rootK > rootKLast) {
                    uint256 numerator = totalSupply.mul(rootK.sub(rootKLast));
                    uint256 denominator = rootK.mul(5).add(rootKLast);
                    uint256 liquidity = numerator / denominator;
                    if (liquidity > 0) _mint(feeTo, liquidity);
                }
            }
        } else if (_kLast != 0) {
            kLast = 0;
        }
    }

    // this low-level function should be called from a contract which performs important safety checks
    function mint(address to) external lock returns (uint256 liquidity) {
        (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
        uint256 balance0 = IERC20Joe(token0).balanceOf(address(this));
        uint256 balance1 = IERC20Joe(token1).balanceOf(address(this));
        uint256 amount0 = balance0.sub(_reserve0);
        uint256 amount1 = balance1.sub(_reserve1);

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint256 _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        if (_totalSupply == 0) {
            address migrator = IJoeFactory(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, "Joe: INSUFFICIENT_LIQUIDITY_MINTED");
        _mint(to, liquidity);

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint256(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Mint(msg.sender, amount0, amount1);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function burn(address to)
        external
        lock
        returns (uint256 amount0, uint256 amount1)
    {
        (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
        address _token0 = token0; // gas savings
        address _token1 = token1; // gas savings
        uint256 balance0 = IERC20Joe(_token0).balanceOf(address(this));
        uint256 balance1 = IERC20Joe(_token1).balanceOf(address(this));
        uint256 liquidity = balanceOf[address(this)];

        bool feeOn = _mintFee(_reserve0, _reserve1);
        uint256 _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
        amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
        amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
        require(
            amount0 > 0 && amount1 > 0,
            "Joe: INSUFFICIENT_LIQUIDITY_BURNED"
        );
        _burn(address(this), liquidity);
        _safeTransfer(_token0, to, amount0);
        _safeTransfer(_token1, to, amount1);
        balance0 = IERC20Joe(_token0).balanceOf(address(this));
        balance1 = IERC20Joe(_token1).balanceOf(address(this));

        _update(balance0, balance1, _reserve0, _reserve1);
        if (feeOn) kLast = uint256(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
        emit Burn(msg.sender, amount0, amount1, to);
    }

    // this low-level function should be called from a contract which performs important safety checks
    function swap(
        uint256 amount0Out,
        uint256 amount1Out,
        address to,
        bytes calldata data
    ) external lock {
        require(
            amount0Out > 0 || amount1Out > 0,
            "Joe: INSUFFICIENT_OUTPUT_AMOUNT"
        );
        (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
        require(
            amount0Out < _reserve0 && amount1Out < _reserve1,
            "Joe: INSUFFICIENT_LIQUIDITY"
        );

        uint256 balance0;
        uint256 balance1;
        {
            // scope for _token{0,1}, avoids stack too deep errors
            address _token0 = token0;
            address _token1 = token1;
            require(to != _token0 && to != _token1, "Joe: 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)
                IJoeCallee(to).joeCall(
                    msg.sender,
                    amount0Out,
                    amount1Out,
                    data
                );
            balance0 = IERC20Joe(_token0).balanceOf(address(this));
            balance1 = IERC20Joe(_token1).balanceOf(address(this));
        }
        uint256 amount0In = balance0 > _reserve0 - amount0Out
            ? balance0 - (_reserve0 - amount0Out)
            : 0;
        uint256 amount1In = balance1 > _reserve1 - amount1Out
            ? balance1 - (_reserve1 - amount1Out)
            : 0;
        require(
            amount0In > 0 || amount1In > 0,
            "Joe: INSUFFICIENT_INPUT_AMOUNT"
        );
        {
            // scope for reserve{0,1}Adjusted, avoids stack too deep errors
            uint256 balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3));
            uint256 balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3));
            require(
                balance0Adjusted.mul(balance1Adjusted) >=
                    uint256(_reserve0).mul(_reserve1).mul(1000**2),
                "Joe: 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,
            IERC20Joe(_token0).balanceOf(address(this)).sub(reserve0)
        );
        _safeTransfer(
            _token1,
            to,
            IERC20Joe(_token1).balanceOf(address(this)).sub(reserve1)
        );
    }

    // force reserves to match balances
    function sync() external lock {
        _update(
            IERC20Joe(token0).balanceOf(address(this)),
            IERC20Joe(token1).balanceOf(address(this)),
            reserve0,
            reserve1
        );
    }
}

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount0","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount1","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount0","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount1","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount0In","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount1In","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount0Out","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amount1Out","type":"uint256"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Swap","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint112","name":"reserve0","type":"uint112"},{"indexed":false,"internalType":"uint112","name":"reserve1","type":"uint112"}],"name":"Sync","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MINIMUM_LIQUIDITY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"burn","outputs":[{"internalType":"uint256","name":"amount0","type":"uint256"},{"internalType":"uint256","name":"amount1","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getReserves","outputs":[{"internalType":"uint112","name":"_reserve0","type":"uint112"},{"internalType":"uint112","name":"_reserve1","type":"uint112"},{"internalType":"uint32","name":"_blockTimestampLast","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_token0","type":"address"},{"internalType":"address","name":"_token1","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"kLast","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"mint","outputs":[{"internalType":"uint256","name":"liquidity","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"price0CumulativeLast","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"price1CumulativeLast","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"}],"name":"skim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount0Out","type":"uint256"},{"internalType":"uint256","name":"amount1Out","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"swap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"sync","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token0","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"token1","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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Swarm Source

ipfs://331c7da4efdadd19669d3d4492f60d8630c0b61e019b3fe2070f1d7d2f93d551
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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