Contract 0x3D0B1912B66114d4096F48A8CEe3A56C231772cA 3

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0x374aa09ee0216054605d18759ffc8803f3c7e07f91b1107198022ca0d9125a99Exit119151472021-02-23 19:03:28650 days 11 hrs ago0x067fb6b6ff920e3ed9eee13808009bc2a6d5d736 IN  Maker: MCD Join BAT A0 Ether0.01654878278.29923333
0xc8de4e7f40851e4c50c1e0c769dce0c0221e3c806a42cc668d9c6e6df5fe7ac1Exit108054022020-09-06 3:05:16821 days 3 hrs ago0xf1ff09e1fb55702b182058a8514a0917abdd582f IN  Maker: MCD Join BAT A0 Ether0.0080471135.3
0xff4c56cdec689acfa2cf8c82f8e1174d71768291d1d6301d2c5131666390ae1eExit107912142020-09-03 23:10:38823 days 7 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.01853573311.7136
0x3719693ce2fd1bdf749ef7d8844b13c0a8edc65a549c6c0fa12f08bc052ff11dExit107903562020-09-03 20:05:09823 days 10 hrs ago0xf1ff09e1fb55702b182058a8514a0917abdd582f IN  Maker: MCD Join BAT A0 Ether0.02923844491.7
0xd22144e6ea555d1643d68c736081a31784d80141b6948621b76ef6291c61605bExit107845212020-09-02 22:30:09824 days 8 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.02980621501.248
0xc2841047700ee5a28b98ac0bf2b06649b12deebe8a97c29a499fdf25c94a5f80Exit106909042020-08-19 13:44:26838 days 17 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.00895579150.7
0xa5789dc321c4dca048360b00e4d7bb1fa5f0c8bd92c550361e2dd1168d242698Exit106601082020-08-14 19:44:43843 days 11 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.01369696184
0x70950b26c53cea49ba86925e9fcd1a59ae2afc825c2fac25ebd1aeeda6776088Join106600552020-08-14 19:30:59843 days 11 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.00961334185
0x46b35866fcdaba97989c59a93bf9359a088a449cb4932536021fcf01a2381721Exit106484462020-08-13 0:42:18845 days 6 hrs ago0x3d041bf077e90159740355ec6f4a34d8cddc5e6b IN  Maker: MCD Join BAT A0 Ether0.01450336244
0xad42a7e951940d85bc61cf3813957dda3f1bf7ee9090307e5d685f36740ce8aeExit106398172020-08-11 16:55:07846 days 13 hrs ago0xd7d56662e818fd2024c3478a79aa16cc79f2202a IN  Maker: MCD Join BAT A0 Ether0.0089142150
0x96e280d872ce6a397db572bd2ff3d452d720427261da5f97dc4df4384cdd807aExit106342052020-08-10 19:59:00847 days 10 hrs ago0x3d041bf077e90159740355ec6f4a34d8cddc5e6b IN  Maker: MCD Join BAT A0 Ether0.00885693119
0x946577af0b86730e320a0ca2722e7e6c0853f0ae2d7ae7881247d2d2e219fe1dExit106340922020-08-10 19:35:48847 days 11 hrs ago0x3d041bf077e90159740355ec6f4a34d8cddc5e6b IN  Maker: MCD Join BAT A0 Ether0.01229283165.1640625
0x0f4fe223a33f8ec56269b870e5cb89aaf8926f075929f0a603d08c2242e6a5d2Exit106340252020-08-10 19:21:44847 days 11 hrs ago0x3d041bf077e90159740355ec6f4a34d8cddc5e6b IN  Maker: MCD Join BAT A0 Ether0.0054634873.40625
0x5ff98f658c65d978f5b671c3895f8d99029f68bfffcfddb8855991b29b044372Join106339672020-08-10 19:08:31847 days 11 hrs ago0x3d041bf077e90159740355ec6f4a34d8cddc5e6b IN  Maker: MCD Join BAT A0 Ether0.0053571280
0xf2e0c9fbe171950c44d288e8bacca0fec6d75e9462bddb3f2ceeb23e74da3ad8Exit106296522020-08-10 3:04:17848 days 3 hrs ago0x3d041bf077e90159740355ec6f4a34d8cddc5e6b IN  Maker: MCD Join BAT A0 Ether0.0043632673.40625
0x55458f9a9b02d0172933443a030a8010190e590fb7c2fc273ac4edc7f7b31ef3Join106296002020-08-10 2:53:17848 days 3 hrs ago0x3d041bf077e90159740355ec6f4a34d8cddc5e6b IN  Maker: MCD Join BAT A0 Ether0.01106004165.1640625
0xaf9e505bc2987e0db00485b19d2d12ab2973051f05bb8160342348cc27905e5cJoin106272222020-08-09 18:01:56848 days 12 hrs ago0xd7d56662e818fd2024c3478a79aa16cc79f2202a IN  Maker: MCD Join BAT A0 Ether0.00723081108
0xe2bb1981828123842151e7b943da4ab79373709515b9291f6622ebed251c2e19Exit106130222020-08-07 13:45:16850 days 17 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.01390167186.75
0xfd88d07dd34c02fe1504ea24b12f2f42998534a138354b759cac8c621726f50dJoin106129642020-08-07 13:30:13850 days 17 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.04794409922.640625
0x4e5b7ac4b22abc219447bd3270e5a7be33867fd8fea25163f9dcb2a2dcd82a2dExit106011632020-08-05 17:49:11852 days 13 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.0043919659
0xde5c812653763cc89ee5c6169fe9605d0671bafd648fb4276ec4e1be3f0cc288Join106010802020-08-05 17:31:25852 days 13 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.00701514135
0xe7396340eca8de3f1db1a0dc32945eecd69e33b152286ecd6af32cd476854877Exit105957152020-08-04 21:29:15853 days 9 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.0027542837
0xb1155434da9d433de75be9c954c9a8df30a44e808af19c6956fdf24250532dbfJoin105954982020-08-04 20:39:59853 days 10 hrs ago0x0e8de0d20bae9af047b124173d8a75485e5bad83 IN  Maker: MCD Join BAT A0 Ether0.0028124842
0x999b977999e94de3355a7ae4db8cbb02e4f91f72212638dad87ab36d26d68534Exit105802852020-08-02 12:03:54855 days 18 hrs ago0xf1ff09e1fb55702b182058a8514a0917abdd582f IN  Maker: MCD Join BAT A0 Ether0.0043399973
0xdc35163b97470b0d5d8ac95b8b4811eb7099d55c85e863e6539df2742314432dJoin105703832020-07-31 23:37:44857 days 7 hrs ago0xb00b6d69822da235a99d2242376066507c9a97b7 IN  Maker: MCD Join BAT A0 Ether0.003347650
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x2f0b23f53734252bda2277357e97e1517d6b042a

Contract Name:
GemJoin

Compiler Version
v0.5.12+commit.7709ece9

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, GNU GPLv3 license
/**
 *Submitted for verification at Etherscan.io on 2019-11-14
*/

// hevm: flattened sources of /nix/store/8xb41r4qd0cjb63wcrxf1qmfg88p0961-dss-6fd7de0/src/join.sol
pragma solidity =0.5.12;

////// /nix/store/8xb41r4qd0cjb63wcrxf1qmfg88p0961-dss-6fd7de0/src/lib.sol
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

/* pragma solidity 0.5.12; */

contract LibNote {
    event LogNote(
        bytes4   indexed  sig,
        address  indexed  usr,
        bytes32  indexed  arg1,
        bytes32  indexed  arg2,
        bytes             data
    ) anonymous;

    modifier note {
        _;
        assembly {
            // log an 'anonymous' event with a constant 6 words of calldata
            // and four indexed topics: selector, caller, arg1 and arg2
            let mark := msize                         // end of memory ensures zero
            mstore(0x40, add(mark, 288))              // update free memory pointer
            mstore(mark, 0x20)                        // bytes type data offset
            mstore(add(mark, 0x20), 224)              // bytes size (padded)
            calldatacopy(add(mark, 0x40), 0, 224)     // bytes payload
            log4(mark, 288,                           // calldata
                 shl(224, shr(224, calldataload(0))), // msg.sig
                 caller,                              // msg.sender
                 calldataload(4),                     // arg1
                 calldataload(36)                     // arg2
                )
        }
    }
}

////// /nix/store/8xb41r4qd0cjb63wcrxf1qmfg88p0961-dss-6fd7de0/src/join.sol
/// join.sol -- Basic token adapters

// Copyright (C) 2018 Rain <[email protected]>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

/* pragma solidity 0.5.12; */

/* import "./lib.sol"; */

contract GemLike {
    function decimals() public view returns (uint);
    function transfer(address,uint) external returns (bool);
    function transferFrom(address,address,uint) external returns (bool);
}

contract DSTokenLike {
    function mint(address,uint) external;
    function burn(address,uint) external;
}

contract VatLike {
    function slip(bytes32,address,int) external;
    function move(address,address,uint) external;
}

/*
    Here we provide *adapters* to connect the Vat to arbitrary external
    token implementations, creating a bounded context for the Vat. The
    adapters here are provided as working examples:

      - `GemJoin`: For well behaved ERC20 tokens, with simple transfer
                   semantics.

      - `ETHJoin`: For native Ether.

      - `DaiJoin`: For connecting internal Dai balances to an external
                   `DSToken` implementation.

    In practice, adapter implementations will be varied and specific to
    individual collateral types, accounting for different transfer
    semantics and token standards.

    Adapters need to implement two basic methods:

      - `join`: enter collateral into the system
      - `exit`: remove collateral from the system

*/

contract GemJoin is LibNote {
    // --- Auth ---
    mapping (address => uint) public wards;
    function rely(address usr) external note auth { wards[usr] = 1; }
    function deny(address usr) external note auth { wards[usr] = 0; }
    modifier auth {
        require(wards[msg.sender] == 1, "GemJoin/not-authorized");
        _;
    }

    VatLike public vat;
    bytes32 public ilk;
    GemLike public gem;
    uint    public dec;
    uint    public live;  // Access Flag

    constructor(address vat_, bytes32 ilk_, address gem_) public {
        wards[msg.sender] = 1;
        live = 1;
        vat = VatLike(vat_);
        ilk = ilk_;
        gem = GemLike(gem_);
        dec = gem.decimals();
    }
    function cage() external note auth {
        live = 0;
    }
    function join(address usr, uint wad) external note {
        require(live == 1, "GemJoin/not-live");
        require(int(wad) >= 0, "GemJoin/overflow");
        vat.slip(ilk, usr, int(wad));
        require(gem.transferFrom(msg.sender, address(this), wad), "GemJoin/failed-transfer");
    }
    function exit(address usr, uint wad) external note {
        require(wad <= 2 ** 255, "GemJoin/overflow");
        vat.slip(ilk, msg.sender, -int(wad));
        require(gem.transfer(usr, wad), "GemJoin/failed-transfer");
    }
}

contract ETHJoin is LibNote {
    // --- Auth ---
    mapping (address => uint) public wards;
    function rely(address usr) external note auth { wards[usr] = 1; }
    function deny(address usr) external note auth { wards[usr] = 0; }
    modifier auth {
        require(wards[msg.sender] == 1, "ETHJoin/not-authorized");
        _;
    }

    VatLike public vat;
    bytes32 public ilk;
    uint    public live;  // Access Flag

    constructor(address vat_, bytes32 ilk_) public {
        wards[msg.sender] = 1;
        live = 1;
        vat = VatLike(vat_);
        ilk = ilk_;
    }
    function cage() external note auth {
        live = 0;
    }
    function join(address usr) external payable note {
        require(live == 1, "ETHJoin/not-live");
        require(int(msg.value) >= 0, "ETHJoin/overflow");
        vat.slip(ilk, usr, int(msg.value));
    }
    function exit(address payable usr, uint wad) external note {
        require(int(wad) >= 0, "ETHJoin/overflow");
        vat.slip(ilk, msg.sender, -int(wad));
        usr.transfer(wad);
    }
}

contract DaiJoin is LibNote {
    // --- Auth ---
    mapping (address => uint) public wards;
    function rely(address usr) external note auth { wards[usr] = 1; }
    function deny(address usr) external note auth { wards[usr] = 0; }
    modifier auth {
        require(wards[msg.sender] == 1, "DaiJoin/not-authorized");
        _;
    }

    VatLike public vat;
    DSTokenLike public dai;
    uint    public live;  // Access Flag

    constructor(address vat_, address dai_) public {
        wards[msg.sender] = 1;
        live = 1;
        vat = VatLike(vat_);
        dai = DSTokenLike(dai_);
    }
    function cage() external note auth {
        live = 0;
    }
    uint constant ONE = 10 ** 27;
    function mul(uint x, uint y) internal pure returns (uint z) {
        require(y == 0 || (z = x * y) / y == x);
    }
    function join(address usr, uint wad) external note {
        vat.move(address(this), usr, mul(ONE, wad));
        dai.burn(msg.sender, wad);
    }
    function exit(address usr, uint wad) external note {
        require(live == 1, "DaiJoin/not-live");
        vat.move(msg.sender, address(this), mul(ONE, wad));
        dai.mint(usr, wad);
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"vat_","type":"address"},{"internalType":"bytes32","name":"ilk_","type":"bytes32"},{"internalType":"address","name":"gem_","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":true,"inputs":[{"indexed":true,"internalType":"bytes4","name":"sig","type":"bytes4"},{"indexed":true,"internalType":"address","name":"usr","type":"address"},{"indexed":true,"internalType":"bytes32","name":"arg1","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"arg2","type":"bytes32"},{"indexed":false,"internalType":"bytes","name":"data","type":"bytes"}],"name":"LogNote","type":"event"},{"constant":false,"inputs":[],"name":"cage","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"dec","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"usr","type":"address"}],"name":"deny","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"usr","type":"address"},{"internalType":"uint256","name":"wad","type":"uint256"}],"name":"exit","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"gem","outputs":[{"internalType":"contract GemLike","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"ilk","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"usr","type":"address"},{"internalType":"uint256","name":"wad","type":"uint256"}],"name":"join","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"live","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"usr","type":"address"}],"name":"rely","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"vat","outputs":[{"internalType":"contract VatLike","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"wards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"}]

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Swarm Source

bzzr://bfdfa122fe3ad43a5d779b939c506cae7507e0f5e807767f61193161f1c1e286
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.