ETH Price: $2,751.89 (-0.71%)

Contract

0x0836222F2B2B24A3F36f98668Ed8F0B38D1a872f
 

Overview

ETH Balance

0 ETH

Eth Value

$0.00

Token Holdings

Multichain Info

No addresses found
Transaction Hash
Method
Block
From
To
Transfer209462842024-10-12 1:35:35118 days ago1728696935IN
Tornado.Cash: 1,000 USDT
0.005 ETH0.0002684312.75474648
Transfer209457252024-10-11 23:42:47118 days ago1728690167IN
Tornado.Cash: 1,000 USDT
0.001 ETH0.0002386911.36655064
Transfer209456782024-10-11 23:33:11118 days ago1728689591IN
Tornado.Cash: 1,000 USDT
0.005 ETH0.0002282310.86817793
Transfer209437522024-10-11 17:05:11118 days ago1728666311IN
Tornado.Cash: 1,000 USDT
0.005 ETH0.0005395625.6937034
Transfer209437412024-10-11 17:02:59118 days ago1728666179IN
Tornado.Cash: 1,000 USDT
0.01 ETH0.0005531426.34019711
Withdraw167252742023-02-28 7:48:59710 days ago1677570539IN
Tornado.Cash: 1,000 USDT
0.00421179 ETH0.0098084924.82862188
Withdraw152983022022-08-08 0:04:19914 days ago1659917059IN
Tornado.Cash: 1,000 USDT
0 ETH0.004810113.05617499
Deposit121172082021-03-26 21:54:221413 days ago1616795662IN
Tornado.Cash: 1,000 USDT
0 ETH0.12764833129
Deposit121118582021-03-26 2:16:021414 days ago1616724962IN
Tornado.Cash: 1,000 USDT
0 ETH0.1543512129
Deposit121118532021-03-26 2:14:381414 days ago1616724878IN
Tornado.Cash: 1,000 USDT
0 ETH0.12835746131
Withdraw121001232021-03-24 6:59:131416 days ago1616569153IN
Tornado.Cash: 1,000 USDT
0.02 ETH0.04335456120
Deposit120954252021-03-23 13:29:141416 days ago1616506154IN
Tornado.Cash: 1,000 USDT
0 ETH0.11746215118
Deposit120952422021-03-23 12:50:291416 days ago1616503829IN
Tornado.Cash: 1,000 USDT
0 ETH0.07812187125
Withdraw120903872021-03-22 19:00:081417 days ago1616439608IN
Tornado.Cash: 1,000 USDT
0.02 ETH0.10795592259.3
Deposit120903782021-03-22 18:58:091417 days ago1616439489IN
Tornado.Cash: 1,000 USDT
0 ETH0.28498579288
Withdraw120028122021-03-09 6:51:131431 days ago1615272673IN
Tornado.Cash: 1,000 USDT
0.02 ETH0.04177196111
Withdraw119921962021-03-07 15:31:101432 days ago1615131070IN
Tornado.Cash: 1,000 USDT
0.02 ETH0.05094499141
Withdraw119921892021-03-07 15:29:571432 days ago1615130997IN
Tornado.Cash: 1,000 USDT
0.02 ETH0.05654655140.9000008
Deposit119920482021-03-07 14:58:511432 days ago1615129131IN
Tornado.Cash: 1,000 USDT
0 ETH0.14433561145
Deposit119915572021-03-07 13:09:441432 days ago1615122584IN
Tornado.Cash: 1,000 USDT
0 ETH0.10850317109
Withdraw119823462021-03-06 3:14:521434 days ago1615000492IN
Tornado.Cash: 1,000 USDT
0.02 ETH0.0297410176.001
Withdraw119785282021-03-05 13:20:151434 days ago1614950415IN
Tornado.Cash: 1,000 USDT
0.02 ETH0.04989228127.5
Deposit119784942021-03-05 13:14:311434 days ago1614950071IN
Tornado.Cash: 1,000 USDT
0 ETH0.13184694135
Withdraw119622002021-03-03 0:48:011437 days ago1614732481IN
Tornado.Cash: 1,000 USDT
0.02 ETH0.03838382102.00000012
Deposit119621932021-03-03 0:46:281437 days ago1614732388IN
Tornado.Cash: 1,000 USDT
0 ETH0.0761922777
View all transactions

Latest 25 internal transactions (View All)

Advanced mode:
Parent Transaction Hash Block
From
To
180496762023-09-02 15:18:47523 days ago1693667927
Tornado.Cash: 1,000 USDT
0.00381341 ETH
180496762023-09-02 15:18:47523 days ago1693667927
Tornado.Cash: 1,000 USDT
0.00381341 ETH
180496252023-09-02 15:08:35523 days ago1693667315
Tornado.Cash: 1,000 USDT
0.00414584 ETH
180496252023-09-02 15:08:35523 days ago1693667315
Tornado.Cash: 1,000 USDT
0.00414584 ETH
180490082023-09-02 13:03:59523 days ago1693659839
Tornado.Cash: 1,000 USDT
0.00395236 ETH
180490082023-09-02 13:03:59523 days ago1693659839
Tornado.Cash: 1,000 USDT
0.00395236 ETH
179469192023-08-19 6:04:11538 days ago1692425051
Tornado.Cash: 1,000 USDT
0.0031327 ETH
179469192023-08-19 6:04:11538 days ago1692425051
Tornado.Cash: 1,000 USDT
0.0031327 ETH
179274652023-08-16 12:42:59540 days ago1692189779
Tornado.Cash: 1,000 USDT
0.006321 ETH
179274652023-08-16 12:42:59540 days ago1692189779
Tornado.Cash: 1,000 USDT
0.006321 ETH
178692732023-08-08 9:20:47549 days ago1691486447
Tornado.Cash: 1,000 USDT
0.00482657 ETH
178692732023-08-08 9:20:47549 days ago1691486447
Tornado.Cash: 1,000 USDT
0.00482657 ETH
178692732023-08-08 9:20:47549 days ago1691486447
Tornado.Cash: 1,000 USDT
0.00504165 ETH
178692732023-08-08 9:20:47549 days ago1691486447
Tornado.Cash: 1,000 USDT
0.00504165 ETH
178691362023-08-08 8:53:23549 days ago1691484803
Tornado.Cash: 1,000 USDT
0.00396023 ETH
178691362023-08-08 8:53:23549 days ago1691484803
Tornado.Cash: 1,000 USDT
0.00396023 ETH
176977692023-07-15 9:00:23573 days ago1689411623
Tornado.Cash: 1,000 USDT
0.00322371 ETH
176977692023-07-15 9:00:23573 days ago1689411623
Tornado.Cash: 1,000 USDT
0.00322371 ETH
176748882023-07-12 3:41:59576 days ago1689133319
Tornado.Cash: 1,000 USDT
0.00342505 ETH
176748882023-07-12 3:41:59576 days ago1689133319
Tornado.Cash: 1,000 USDT
0.00342505 ETH
176411812023-07-07 9:57:35581 days ago1688723855
Tornado.Cash: 1,000 USDT
0.00488378 ETH
176411812023-07-07 9:57:35581 days ago1688723855
Tornado.Cash: 1,000 USDT
0.00488378 ETH
176411102023-07-07 9:42:59581 days ago1688722979
Tornado.Cash: 1,000 USDT
0.00527834 ETH
176411102023-07-07 9:42:59581 days ago1688722979
Tornado.Cash: 1,000 USDT
0.00527834 ETH
176410922023-07-07 9:39:23581 days ago1688722763
Tornado.Cash: 1,000 USDT
0.0047086 ETH
View All Internal Transactions
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0xD4B88Df4...b20C8Cfa3
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
TornadoCash_erc20

Compiler Version
v0.5.11+commit.c082d0b4

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license, Audited
/**
 *Submitted for verification at Etherscan.io on 2019-12-16
*/

// https://tornado.cash
/*
* d888888P                                           dP              a88888b.                   dP
*    88                                              88             d8'   `88                   88
*    88    .d8888b. 88d888b. 88d888b. .d8888b. .d888b88 .d8888b.    88        .d8888b. .d8888b. 88d888b.
*    88    88'  `88 88'  `88 88'  `88 88'  `88 88'  `88 88'  `88    88        88'  `88 Y8ooooo. 88'  `88
*    88    88.  .88 88       88    88 88.  .88 88.  .88 88.  .88 dP Y8.   .88 88.  .88       88 88    88
*    dP    `88888P' dP       dP    dP `88888P8 `88888P8 `88888P' 88  Y88888P' `88888P8 `88888P' dP    dP
* ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
*/

pragma solidity ^0.5.8;

library Hasher {
  function MiMCSponge(uint256 in_xL, uint256 in_xR) public pure returns (uint256 xL, uint256 xR);
}

contract MerkleTreeWithHistory {
  uint256 public constant FIELD_SIZE = 21888242871839275222246405745257275088548364400416034343698204186575808495617;
  uint256 public constant ZERO_VALUE = 21663839004416932945382355908790599225266501822907911457504978515578255421292; // = keccak256("tornado") % FIELD_SIZE

  uint32 public levels;

  // the following variables are made public for easier testing and debugging and
  // are not supposed to be accessed in regular code
  bytes32[] public filledSubtrees;
  bytes32[] public zeros;
  uint32 public currentRootIndex = 0;
  uint32 public nextIndex = 0;
  uint32 public constant ROOT_HISTORY_SIZE = 100;
  bytes32[ROOT_HISTORY_SIZE] public roots;

  constructor(uint32 _treeLevels) public {
    require(_treeLevels > 0, "_treeLevels should be greater than zero");
    require(_treeLevels < 32, "_treeLevels should be less than 32");
    levels = _treeLevels;

    bytes32 currentZero = bytes32(ZERO_VALUE);
    zeros.push(currentZero);
    filledSubtrees.push(currentZero);

    for (uint32 i = 1; i < levels; i++) {
      currentZero = hashLeftRight(currentZero, currentZero);
      zeros.push(currentZero);
      filledSubtrees.push(currentZero);
    }

    roots[0] = hashLeftRight(currentZero, currentZero);
  }

  /**
    @dev Hash 2 tree leaves, returns MiMC(_left, _right)
  */
  function hashLeftRight(bytes32 _left, bytes32 _right) public pure returns (bytes32) {
    require(uint256(_left) < FIELD_SIZE, "_left should be inside the field");
    require(uint256(_right) < FIELD_SIZE, "_right should be inside the field");
    uint256 R = uint256(_left);
    uint256 C = 0;
    (R, C) = Hasher.MiMCSponge(R, C);
    R = addmod(R, uint256(_right), FIELD_SIZE);
    (R, C) = Hasher.MiMCSponge(R, C);
    return bytes32(R);
  }

  function _insert(bytes32 _leaf) internal returns(uint32 index) {
    uint32 currentIndex = nextIndex;
    require(currentIndex != uint32(2)**levels, "Merkle tree is full. No more leafs can be added");
    nextIndex += 1;
    bytes32 currentLevelHash = _leaf;
    bytes32 left;
    bytes32 right;

    for (uint32 i = 0; i < levels; i++) {
      if (currentIndex % 2 == 0) {
        left = currentLevelHash;
        right = zeros[i];

        filledSubtrees[i] = currentLevelHash;
      } else {
        left = filledSubtrees[i];
        right = currentLevelHash;
      }

      currentLevelHash = hashLeftRight(left, right);

      currentIndex /= 2;
    }

    currentRootIndex = (currentRootIndex + 1) % ROOT_HISTORY_SIZE;
    roots[currentRootIndex] = currentLevelHash;
    return nextIndex - 1;
  }

  /**
    @dev Whether the root is present in the root history
  */
  function isKnownRoot(bytes32 _root) public view returns(bool) {
    if (_root == 0) {
      return false;
    }
    uint32 i = currentRootIndex;
    do {
      if (_root == roots[i]) {
        return true;
      }
      if (i == 0) {
        i = ROOT_HISTORY_SIZE;
      }
      i--;
    } while (i != currentRootIndex);
    return false;
  }

  /**
    @dev Returns the last root
  */
  function getLastRoot() public view returns(bytes32) {
    return roots[currentRootIndex];
  }
}

// File: @openzeppelin/contracts/utils/ReentrancyGuard.sol

pragma solidity ^0.5.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 */
contract ReentrancyGuard {
    // counter to allow mutex lock with only one SSTORE operation
    uint256 private _guardCounter;

    constructor () internal {
        // The counter starts at one to prevent changing it from zero to a non-zero
        // value, which is a more expensive operation.
        _guardCounter = 1;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _guardCounter += 1;
        uint256 localCounter = _guardCounter;
        _;
        require(localCounter == _guardCounter, "ReentrancyGuard: reentrant call");
    }
}

// File: contracts/Tornado.sol

// https://tornado.cash
/*
* d888888P                                           dP              a88888b.                   dP
*    88                                              88             d8'   `88                   88
*    88    .d8888b. 88d888b. 88d888b. .d8888b. .d888b88 .d8888b.    88        .d8888b. .d8888b. 88d888b.
*    88    88'  `88 88'  `88 88'  `88 88'  `88 88'  `88 88'  `88    88        88'  `88 Y8ooooo. 88'  `88
*    88    88.  .88 88       88    88 88.  .88 88.  .88 88.  .88 dP Y8.   .88 88.  .88       88 88    88
*    dP    `88888P' dP       dP    dP `88888P8 `88888P8 `88888P' 88  Y88888P' `88888P8 `88888P' dP    dP
* ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
*/

pragma solidity ^0.5.8;



contract IVerifier {
  function verifyProof(bytes memory _proof, uint256[6] memory _input) public returns(bool);
}

contract Tornado is MerkleTreeWithHistory, ReentrancyGuard {
  uint256 public denomination;
  mapping(bytes32 => bool) public nullifierHashes;
  // we store all commitments just to prevent accidental deposits with the same commitment
  mapping(bytes32 => bool) public commitments;
  IVerifier public verifier;

  // operator can update snark verification key
  // after the final trusted setup ceremony operator rights are supposed to be transferred to zero address
  address public operator;
  modifier onlyOperator {
    require(msg.sender == operator, "Only operator can call this function.");
    _;
  }

  event Deposit(bytes32 indexed commitment, uint32 leafIndex, uint256 timestamp);
  event Withdrawal(address to, bytes32 nullifierHash, address indexed relayer, uint256 fee);

  /**
    @dev The constructor
    @param _verifier the address of SNARK verifier for this contract
    @param _denomination transfer amount for each deposit
    @param _merkleTreeHeight the height of deposits' Merkle Tree
    @param _operator operator address (see operator comment above)
  */
  constructor(
    IVerifier _verifier,
    uint256 _denomination,
    uint32 _merkleTreeHeight,
    address _operator
  ) MerkleTreeWithHistory(_merkleTreeHeight) public {
    require(_denomination > 0, "denomination should be greater than 0");
    verifier = _verifier;
    operator = _operator;
    denomination = _denomination;
  }

  /**
    @dev Deposit funds into the contract. The caller must send (for ETH) or approve (for ERC20) value equal to or `denomination` of this instance.
    @param _commitment the note commitment, which is PedersenHash(nullifier + secret)
  */
  function deposit(bytes32 _commitment) external payable nonReentrant {
    require(!commitments[_commitment], "The commitment has been submitted");

    uint32 insertedIndex = _insert(_commitment);
    commitments[_commitment] = true;
    _processDeposit();

    emit Deposit(_commitment, insertedIndex, block.timestamp);
  }

  /** @dev this function is defined in a child contract */
  function _processDeposit() internal;

  /**
    @dev Withdraw a deposit from the contract. `proof` is a zkSNARK proof data, and input is an array of circuit public inputs
    `input` array consists of:
      - merkle root of all deposits in the contract
      - hash of unique deposit nullifier to prevent double spends
      - the recipient of funds
      - optional fee that goes to the transaction sender (usually a relay)
  */
  function withdraw(bytes calldata _proof, bytes32 _root, bytes32 _nullifierHash, address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund) external payable nonReentrant {
    require(_fee <= denomination, "Fee exceeds transfer value");
    require(!nullifierHashes[_nullifierHash], "The note has been already spent");
    require(isKnownRoot(_root), "Cannot find your merkle root"); // Make sure to use a recent one
    require(verifier.verifyProof(_proof, [uint256(_root), uint256(_nullifierHash), uint256(_recipient), uint256(_relayer), _fee, _refund]), "Invalid withdraw proof");

    nullifierHashes[_nullifierHash] = true;
    _processWithdraw(_recipient, _relayer, _fee, _refund);
    emit Withdrawal(_recipient, _nullifierHash, _relayer, _fee);
  }

  /** @dev this function is defined in a child contract */
  function _processWithdraw(address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund) internal;

  /** @dev whether a note is already spent */
  function isSpent(bytes32 _nullifierHash) public view returns(bool) {
    return nullifierHashes[_nullifierHash];
  }

  /** @dev whether an array of notes is already spent */
  function isSpentArray(bytes32[] calldata _nullifierHashes) external view returns(bool[] memory spent) {
    spent = new bool[](_nullifierHashes.length);
    for(uint i = 0; i < _nullifierHashes.length; i++) {
      if (isSpent(_nullifierHashes[i])) {
        spent[i] = true;
      }
    }
  }

  /**
    @dev allow operator to update SNARK verification keys. This is needed to update keys after the final trusted setup ceremony is held.
    After that operator rights are supposed to be transferred to zero address
  */
  function updateVerifier(address _newVerifier) external onlyOperator {
    verifier = IVerifier(_newVerifier);
  }

  /** @dev operator can change his address */
  function changeOperator(address _newOperator) external onlyOperator {
    operator = _newOperator;
  }
}

// File: contracts/ERC20Tornado.sol

// https://tornado.cash
/*
* d888888P                                           dP              a88888b.                   dP
*    88                                              88             d8'   `88                   88
*    88    .d8888b. 88d888b. 88d888b. .d8888b. .d888b88 .d8888b.    88        .d8888b. .d8888b. 88d888b.
*    88    88'  `88 88'  `88 88'  `88 88'  `88 88'  `88 88'  `88    88        88'  `88 Y8ooooo. 88'  `88
*    88    88.  .88 88       88    88 88.  .88 88.  .88 88.  .88 dP Y8.   .88 88.  .88       88 88    88
*    dP    `88888P' dP       dP    dP `88888P8 `88888P8 `88888P' 88  Y88888P' `88888P8 `88888P' dP    dP
* ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
*/

pragma solidity ^0.5.8;


contract TornadoCash_erc20 is Tornado {
  address public token;

  constructor(
    IVerifier _verifier,
    uint256 _denomination,
    uint32 _merkleTreeHeight,
    address _operator,
    address _token
  ) Tornado(_verifier, _denomination, _merkleTreeHeight, _operator) public {
    token = _token;
  }

  function _processDeposit() internal {
    require(msg.value == 0, "ETH value is supposed to be 0 for ERC20 instance");
    _safeErc20TransferFrom(msg.sender, address(this), denomination);
  }

  function _processWithdraw(address payable _recipient, address payable _relayer, uint256 _fee, uint256 _refund) internal {
    require(msg.value == _refund, "Incorrect refund amount received by the contract");

    _safeErc20Transfer(_recipient, denomination - _fee);
    if (_fee > 0) {
      _safeErc20Transfer(_relayer, _fee);
    }

    if (_refund > 0) {
      (bool success, ) = _recipient.call.value(_refund)("");
      if (!success) {
        // let's return _refund back to the relayer
        _relayer.transfer(_refund);
      }
    }
  }

  function _safeErc20TransferFrom(address _from, address _to, uint256 _amount) internal {
    (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0x23b872dd /* transferFrom */, _from, _to, _amount));
    require(success, "not enough allowed tokens");

    // if contract returns some data lets make sure that is `true` according to standard
    if (data.length > 0) {
      require(data.length == 32, "data length should be either 0 or 32 bytes");
      success = abi.decode(data, (bool));
      require(success, "not enough allowed tokens. Token returns false.");
    }
  }

  function _safeErc20Transfer(address _to, uint256 _amount) internal {
    (bool success, bytes memory data) = token.call(abi.encodeWithSelector(0xa9059cbb /* transfer */, _to, _amount));
    require(success, "not enough tokens");

    // if contract returns some data lets make sure that is `true` according to standard
    if (data.length > 0) {
      require(data.length == 32, "data length should be either 0 or 32 bytes");
      success = abi.decode(data, (bool));
      require(success, "not enough tokens. Token returns false.");
    }
  }
}

Contract Security Audit

Contract ABI

[{"constant":false,"inputs":[{"internalType":"address","name":"_newOperator","type":"address"}],"name":"changeOperator","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"nullifierHashes","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"bytes","name":"_proof","type":"bytes"},{"internalType":"bytes32","name":"_root","type":"bytes32"},{"internalType":"bytes32","name":"_nullifierHash","type":"bytes32"},{"internalType":"address payable","name":"_recipient","type":"address"},{"internalType":"address payable","name":"_relayer","type":"address"},{"internalType":"uint256","name":"_fee","type":"uint256"},{"internalType":"uint256","name":"_refund","type":"uint256"}],"name":"withdraw","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"verifier","outputs":[{"internalType":"contract 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Libraries Used


Deployed Bytecode Sourcemap

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Swarm Source

bzzr://eedd377dd479e33096b8ae40ac1f5cf72ccf7e7f36628dcbb747b78530751d0c

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