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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 35 (24,583,89724,583,924)
Gas Used (indexed) 403,772
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

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Hash Method Block Age From/To Value Txn Fee Type
0x12d3b715...29ff05 transfer 24,583,924 IN 0x0ADA3111...Eb5b 0 ETH 0.000112425075 ETH EIP-1559
0x2c07d5e4...739c46 transfer 24,583,923 IN 0x2F876327...8E42 0 ETH 0.000005564006 ETH EIP-1559
0xf58c6583...c577e4 transfer 24,583,921 IN 0x2f82bfa7...8E42 0 ETH 0.000005336082 ETH EIP-1559
0x3707bf67...ae52c0 transfer 24,583,919 IN 0x1fdcD548...dbA7 0 ETH 0.000112216505 ETH EIP-1559
0xb09050d8...ec0fc1 transfer 24,583,918 IN 0x95478Ee6...8c89 0 ETH 0.000004881531 ETH EIP-1559
0xaa2f1457...f27c51 transfer 24,583,909 IN 0x9fbDa529...b0B4 0 ETH 0.000005931922 ETH EIP-1559
0x85d6992b...d38e2d transfer 24,583,909 IN 0x1493692e...6F94 0 ETH 0.000005931922 ETH EIP-1559
0x021316f2...fc0fe2 transfer 24,583,899 IN 0xdFf0eE7E...A56a 0 ETH 0.000008938593 ETH EIP-1559
0x4240c589...7ac1ef transfer 24,583,898 IN 0xdFF09f58...A56A 0 ETH 0.000054440241 ETH Legacy
0x92857d42...079dd6 transfer 24,583,897 IN 0x07cF4B73...Be4c 0 ETH 0.000055063220 ETH Legacy