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Address Contract Dai (DAI) Partially Verified View Token →

Address 0x6B175474E89094C44Da98b954EedeAC495271d0F
Balance 0 ETH
Nonce 1
Code Size 7904 bytes
Last Active
Indexed Transactions 72 (24,585,88824,585,898)
Gas Used (indexed) 349,892
External Etherscan · Sourcify

Contract Bytecode

7904 bytes
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Verified Source Code Partial Match

Compiler: v0.5.12+commit.7709ece9 EVM: petersburg Optimization: No
Dai.sol 190 lines
// hevm: flattened sources of /nix/store/8xb41r4qd0cjb63wcrxf1qmfg88p0961-dss-6fd7de0/src/dai.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/dai.sol
// Copyright (C) 2017, 2018, 2019 dbrock, rain, mrchico

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

    // --- ERC20 Data ---
    string  public constant name     = "Dai Stablecoin";
    string  public constant symbol   = "DAI";
    string  public constant version  = "1";
    uint8   public constant decimals = 18;
    uint256 public totalSupply;

    mapping (address => uint)                      public balanceOf;
    mapping (address => mapping (address => uint)) public allowance;
    mapping (address => uint)                      public nonces;

    event Approval(address indexed src, address indexed guy, uint wad);
    event Transfer(address indexed src, address indexed dst, uint wad);

    // --- Math ---
    function add(uint x, uint y) internal pure returns (uint z) {
        require((z = x + y) >= x);
    }
    function sub(uint x, uint y) internal pure returns (uint z) {
        require((z = x - y) <= x);
    }

    // --- EIP712 niceties ---
    bytes32 public DOMAIN_SEPARATOR;
    // bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address holder,address spender,uint256 nonce,uint256 expiry,bool allowed)");
    bytes32 public constant PERMIT_TYPEHASH = 0xea2aa0a1be11a07ed86d755c93467f4f82362b452371d1ba94d1715123511acb;

    constructor(uint256 chainId_) public {
        wards[msg.sender] = 1;
        DOMAIN_SEPARATOR = keccak256(abi.encode(
            keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
            keccak256(bytes(name)),
            keccak256(bytes(version)),
            chainId_,
            address(this)
        ));
    }

    // --- Token ---
    function transfer(address dst, uint wad) external returns (bool) {
        return transferFrom(msg.sender, dst, wad);
    }
    function transferFrom(address src, address dst, uint wad)
        public returns (bool)
    {
        require(balanceOf[src] >= wad, "Dai/insufficient-balance");
        if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
            require(allowance[src][msg.sender] >= wad, "Dai/insufficient-allowance");
            allowance[src][msg.sender] = sub(allowance[src][msg.sender], wad);
        }
        balanceOf[src] = sub(balanceOf[src], wad);
        balanceOf[dst] = add(balanceOf[dst], wad);
        emit Transfer(src, dst, wad);
        return true;
    }
    function mint(address usr, uint wad) external auth {
        balanceOf[usr] = add(balanceOf[usr], wad);
        totalSupply    = add(totalSupply, wad);
        emit Transfer(address(0), usr, wad);
    }
    function burn(address usr, uint wad) external {
        require(balanceOf[usr] >= wad, "Dai/insufficient-balance");
        if (usr != msg.sender && allowance[usr][msg.sender] != uint(-1)) {
            require(allowance[usr][msg.sender] >= wad, "Dai/insufficient-allowance");
            allowance[usr][msg.sender] = sub(allowance[usr][msg.sender], wad);
        }
        balanceOf[usr] = sub(balanceOf[usr], wad);
        totalSupply    = sub(totalSupply, wad);
        emit Transfer(usr, address(0), wad);
    }
    function approve(address usr, uint wad) external returns (bool) {
        allowance[msg.sender][usr] = wad;
        emit Approval(msg.sender, usr, wad);
        return true;
    }

    // --- Alias ---
    function push(address usr, uint wad) external {
        transferFrom(msg.sender, usr, wad);
    }
    function pull(address usr, uint wad) external {
        transferFrom(usr, msg.sender, wad);
    }
    function move(address src, address dst, uint wad) external {
        transferFrom(src, dst, wad);
    }

    // --- Approve by signature ---
    function permit(address holder, address spender, uint256 nonce, uint256 expiry,
                    bool allowed, uint8 v, bytes32 r, bytes32 s) external
    {
        bytes32 digest =
            keccak256(abi.encodePacked(
                "\x19\x01",
                DOMAIN_SEPARATOR,
                keccak256(abi.encode(PERMIT_TYPEHASH,
                                     holder,
                                     spender,
                                     nonce,
                                     expiry,
                                     allowed))
        ));

        require(holder != address(0), "Dai/invalid-address-0");
        require(holder == ecrecover(digest, v, r, s), "Dai/invalid-permit");
        require(expiry == 0 || now <= expiry, "Dai/permit-expired");
        require(nonce == nonces[holder]++, "Dai/invalid-nonce");
        uint wad = allowed ? uint(-1) : 0;
        allowance[holder][spender] = wad;
        emit Approval(holder, spender, wad);
    }
}

Read Contract

DOMAIN_SEPARATOR 0x3644e515 → bytes32
PERMIT_TYPEHASH 0x30adf81f → bytes32
allowance 0xdd62ed3e → uint256
balanceOf 0x70a08231 → uint256
decimals 0x313ce567 → uint8
name 0x06fdde03 → string
nonces 0x7ecebe00 → uint256
symbol 0x95d89b41 → string
totalSupply 0x18160ddd → uint256
version 0x54fd4d50 → string
wards 0xbf353dbb → uint256

Write Contract 11 functions

These functions modify contract state and require a wallet transaction to execute.

approve 0x095ea7b3
address usr
uint256 wad
returns: bool
burn 0x9dc29fac
address usr
uint256 wad
deny 0x9c52a7f1
address guy
mint 0x40c10f19
address usr
uint256 wad
move 0xbb35783b
address src
address dst
uint256 wad
permit 0x8fcbaf0c
address holder
address spender
uint256 nonce
uint256 expiry
bool allowed
uint8 v
bytes32 r
bytes32 s
pull 0xf2d5d56b
address usr
uint256 wad
push 0xb753a98c
address usr
uint256 wad
rely 0x65fae35e
address guy
transfer 0xa9059cbb
address dst
uint256 wad
returns: bool
transferFrom 0x23b872dd
address src
address dst
uint256 wad
returns: bool

Recent Transactions

|
Hash Method Block Age From/To Value Txn Fee Type
0x5e09f9f9...df2bb6 transfer 24,585,898 IN 0x24d9f69B...e5c6 0 ETH 0.000005059367 ETH EIP-1559
0x2ce90d29...33df52 transfer 24,585,898 IN 0x617d0779...acA7 0 ETH 0.000004361381 ETH EIP-1559
0x9d429637...99335c transfer 24,585,895 IN 0xad111090...e9bD 0 ETH 0.000005489180 ETH Legacy
0xb102ce9a...4f5576 transfer 24,585,895 IN 0x47713cb3...762B 0 ETH 0.000005396959 ETH EIP-1559
0xe4b0b717...08135f transfer 24,585,894 IN 0x23150Feb...0857 0 ETH 0.000004650075 ETH EIP-1559
0xd04bda2f...ceba51 transfer 24,585,893 IN 0x11cE787a...d324 0 ETH 0.000005510448 ETH Legacy
0xa01aacce...bc7852 transfer 24,585,893 IN 0xAE8cBB7e...174A 0 ETH 0.000004732894 ETH EIP-1559
0x8f5b4e76...d8a10e transfer 24,585,890 IN 0x75573492...4dB2 0 ETH 0.000005569208 ETH EIP-1559
0xb44630ca...651301 transfer 24,585,890 IN 0x2CfF890f...2680 0 ETH 0.000005577137 ETH EIP-1559
0x388082e9...635b56 transfer 24,585,888 IN 0xDFd5293D...963d 0 ETH 0.000060030398 ETH EIP-1559