false
false
3418880

Contract Address Details

0xA46cE4b581e465Fe09abF0F6c4E8B06074210A26

Contract Name
MedianSTFXUSD
Creator
0xf4928d–f4db3f at 0x21ea01–8017cc
Balance
0 PUNDIAI
Tokens
Fetching tokens...
Transactions
20,187 Transactions
Transfers
0 Transfers
Gas Used
1,497,671,526
Last Balance Update
21475636
Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
Contract name:
MedianSTFXUSD




Optimization enabled
false
Compiler version
v0.5.12+commit.7709ece9




EVM Version
default




Verified at
2023-07-14T05:55:57.793896Z

Contract source code

// hevm: flattened sources of src/median.sol

pragma solidity >=0.5.10;

////// lib/median/src/median.sol
/// median.sol

// Copyright (C) 2017-2020 Maker Ecosystem Growth Holdings, INC.

// 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 >=0.5.10; */

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
                )
        }
    }
}

contract Median 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, "Median/not-authorized");
        _;
    }

    uint128        val;
    uint32  public age;
    bytes32 public constant wat = "ethusd"; // You want to change this every deploy
    uint256 public bar = 1;

    // Authorized oracles, set by an auth
    mapping (address => uint256) public orcl;

    // Whitelisted contracts, set by an auth
    mapping (address => uint256) public bud;

    // Mapping for at most 256 oracles
    mapping (uint8 => address) public slot;

    modifier toll { require(bud[msg.sender] == 1, "Median/contract-not-whitelisted"); _;}

    event LogMedianPrice(uint256 val, uint256 age);

    //Set type of Oracle
    constructor() public {
        wards[msg.sender] = 1;
    }

    function read() external view toll returns (uint256) {
        require(val > 0, "Median/invalid-price-feed");
        return val;
    }

    function peek() external view toll returns (uint256,bool) {
        return (val, val > 0);
    }

    function recover(uint256 val_, uint256 age_, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
        return ecrecover(
            keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", keccak256(abi.encodePacked(val_, age_, wat)))),
            v, r, s
        );
    }

    function poke(
        uint256[] calldata val_, uint256[] calldata age_,
        uint8[] calldata v, bytes32[] calldata r, bytes32[] calldata s) external
    {
        require(val_.length == bar, "Median/bar-too-low");

        uint256 bloom = 0;
        uint256 last = 0;
        uint256 zzz = age;

        for (uint i = 0; i < val_.length; i++) {
            // Validate the values were signed by an authorized oracle
            address signer = recover(val_[i], age_[i], v[i], r[i], s[i]);
            // Check that signer is an oracle
            require(orcl[signer] == 1, "Median/invalid-oracle");
            // Price feed age greater than last medianizer age
            require(age_[i] > zzz, "Median/stale-message");
            // Check for ordered values
            require(val_[i] >= last, "Median/messages-not-in-order");
            last = val_[i];
            // Bloom filter for signer uniqueness
            uint8 sl = uint8(uint256(signer) >> 152);
            require((bloom >> sl) % 2 == 0, "Median/oracle-already-signed");
            bloom += uint256(2) ** sl;
        }

        val = uint128(val_[val_.length >> 1]);
        age = uint32(block.timestamp);

        emit LogMedianPrice(val, age);
    }

    function lift(address[] calldata a) external note auth {
        for (uint i = 0; i < a.length; i++) {
            require(a[i] != address(0), "Median/no-oracle-0");
            uint8 s = uint8(uint256(a[i]) >> 152);
            require(slot[s] == address(0), "Median/signer-already-exists");
            orcl[a[i]] = 1;
            slot[s] = a[i];
        }
    }

    function drop(address[] calldata a) external note auth {
       for (uint i = 0; i < a.length; i++) {
            orcl[a[i]] = 0;
            slot[uint8(uint256(a[i]) >> 152)] = address(0);
       }
    }

    function setBar(uint256 bar_) external note auth {
        require(bar_ > 0, "Median/quorum-is-zero");
        require(bar_ % 2 != 0, "Median/quorum-not-odd-number");
        bar = bar_;
    }

    function kiss(address a) external note auth {
        require(a != address(0), "Median/no-contract-0");
        bud[a] = 1;
    }

    function diss(address a) external note auth {
        bud[a] = 0;
    }

    function kiss(address[] calldata a) external note auth {
        for(uint i = 0; i < a.length; i++) {
            require(a[i] != address(0), "Median/no-contract-0");
            bud[a[i]] = 1;
        }
    }

    function diss(address[] calldata a) external note auth {
        for(uint i = 0; i < a.length; i++) {
            bud[a[i]] = 0;
        }
    }
}

////// src/median.sol
/// median.sol

// Copyright (C) 2019-2020 Maker Ecosystem Growth Holdings, INC.

// 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 >=0.5.10; */

/* import "median/median.sol"; */

contract MedianSTFXUSD is Median {
    bytes32 public constant wat = "STFXUSD";

    function recover(uint256 val_, uint256 age_, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
        return ecrecover(
            keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", keccak256(abi.encodePacked(val_, age_, wat)))),
            v, r, s
        );
    }
}

Contract ABI

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Contract Creation Code

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