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From
To
Exit208929532024-10-04 15:07:35110 days ago1728054455IN
Sky: MCD Join DAI
0 ETH0.0009975214.03831645
Exit208340072024-09-26 9:51:23118 days ago1727344283IN
Sky: MCD Join DAI
0 ETH0.001124415.82400873
Join208339812024-09-26 9:46:11118 days ago1727343971IN
Sky: MCD Join DAI
0 ETH0.001174616.08234687
Exit206772042024-09-04 12:25:11140 days ago1725452711IN
Sky: MCD Join DAI
0 ETH0.000151772.13601413
Join206771672024-09-04 12:17:35140 days ago1725452255IN
Sky: MCD Join DAI
0 ETH0.000171042.34149024
Join206771272024-09-04 12:09:35140 days ago1725451775IN
Sky: MCD Join DAI
0 ETH0.000119232.16081841
Exit206266522024-08-28 11:01:11147 days ago1724842871IN
Sky: MCD Join DAI
0 ETH0.000119771.68558847
Join206266342024-08-28 10:57:35147 days ago1724842655IN
Sky: MCD Join DAI
0 ETH0.00012471.70747497
Exit205266772024-08-14 11:49:35161 days ago1723636175IN
Sky: MCD Join DAI
0 ETH0.000183692.58516741
Join205266532024-08-14 11:44:47161 days ago1723635887IN
Sky: MCD Join DAI
0 ETH0.000176292.41335085
Exit204599922024-08-05 4:31:35170 days ago1722832295IN
Sky: MCD Join DAI
0 ETH0.002543628.84524601
Join204599632024-08-05 4:25:47170 days ago1722831947IN
Sky: MCD Join DAI
0 ETH0.0024574230.10959148
Exit200318862024-06-06 9:27:11230 days ago1717666031IN
Sky: MCD Join DAI
0 ETH0.0020150928.35887032
Join200316582024-06-06 8:41:11230 days ago1717663271IN
Sky: MCD Join DAI
0 ETH0.0008400512.12337143
Exit196491452024-04-13 20:53:59284 days ago1713041639IN
Sky: MCD Join DAI
0 ETH0.01861179261.92767741
Exit194825332024-03-21 10:45:47307 days ago1711017947IN
Sky: MCD Join DAI
0 ETH0.002116129.78044454
Exit193038822024-02-25 10:04:35332 days ago1708855475IN
Sky: MCD Join DAI
0 ETH0.0019916928.02955705
Join193035642024-02-25 9:00:47332 days ago1708851647IN
Sky: MCD Join DAI
0 ETH0.0020868428.56772449
Exit190900672024-01-26 10:05:23362 days ago1706263523IN
Sky: MCD Join DAI
0 ETH0.0017638524.82308434
Join190900592024-01-26 10:03:47362 days ago1706263427IN
Sky: MCD Join DAI
0 ETH0.0017659125.48507261
Exit189836692024-01-11 12:25:35377 days ago1704975935IN
Sky: MCD Join DAI
0 ETH0.0019216927.04442234
Join189836092024-01-11 12:13:35377 days ago1704975215IN
Sky: MCD Join DAI
0 ETH0.0021520729.46557245
Exit188473442023-12-23 8:32:35396 days ago1703320355IN
Sky: MCD Join DAI
0 ETH0.0013248418.6448325
Join188473252023-12-23 8:28:47396 days ago1703320127IN
Sky: MCD Join DAI
0 ETH0.0013636619.67994514
Exit186846912023-11-30 13:22:59419 days ago1701350579IN
Sky: MCD Join DAI
0 ETH0.0024786134.88204324
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89281582019-11-13 19:17:571897 days ago1573672677  Contract Creation0 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
DaiJoin

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":"address","name":"dai_","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":"dai","outputs":[{"internalType":"contract DSTokenLike","name":"","type":"address"}],"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":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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Deployed Bytecode

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

00000000000000000000000035d1b3f3d7966a1dfe207aa4514c12a259a0492b0000000000000000000000006b175474e89094c44da98b954eedeac495271d0f

-----Decoded View---------------
Arg [0] : vat_ (address): 0x35D1b3F3D7966A1DFe207aa4514C12a259A0492B
Arg [1] : dai_ (address): 0x6B175474E89094C44Da98b954EedeAC495271d0F

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000035d1b3f3d7966a1dfe207aa4514c12a259a0492b
Arg [1] : 0000000000000000000000006b175474e89094c44da98b954eedeac495271d0f


Deployed Bytecode Sourcemap

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Swarm Source

bzzr://73556d6c1e4fe23e478f0dc378056d7722545a3e43c977fa340ddc81d62345c8

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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OVERVIEW

Sky (formerly Maker) enables users to get rewarded for non-custodial savings.

Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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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.