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Block
From
To
Approve222910262025-04-17 20:12:4731 hrs ago1744920767IN
Nucleus Vision Token
0 ETH0.000038630.79479695
Approve222886582025-04-17 12:16:3539 hrs ago1744892195IN
Nucleus Vision Token
0 ETH0.000067731.39374195
Transfer222670962025-04-14 12:01:594 days ago1744632119IN
Nucleus Vision Token
0 ETH0.000464859.35207492
Transfer222083472025-04-06 7:21:2312 days ago1743924083IN
Nucleus Vision Token
0 ETH0.000015720.52780301
Approve222028142025-04-05 12:48:4713 days ago1743857327IN
Nucleus Vision Token
0 ETH0.000069211.42422991
Approve221893372025-04-03 15:39:5915 days ago1743694799IN
Nucleus Vision Token
0 ETH0.000041741.47042123
Approve221796812025-04-02 7:18:1116 days ago1743578291IN
Nucleus Vision Token
0 ETH0.00003650.75
Transfer221794132025-04-02 6:23:5916 days ago1743575039IN
Nucleus Vision Token
0 ETH0.000025330.77711308
Transfer221794082025-04-02 6:22:5916 days ago1743574979IN
Nucleus Vision Token
0 ETH0.000022750.69824491
Transfer221793992025-04-02 6:21:1116 days ago1743574871IN
Nucleus Vision Token
0 ETH0.000022890.70232653
Transfer221793982025-04-02 6:20:5916 days ago1743574859IN
Nucleus Vision Token
0 ETH0.00002310.70896031
Transfer221793972025-04-02 6:20:4716 days ago1743574847IN
Nucleus Vision Token
0 ETH0.000023940.73453787
Transfer221793962025-04-02 6:20:3516 days ago1743574835IN
Nucleus Vision Token
0 ETH0.000024990.76708718
Transfer221793952025-04-02 6:20:2316 days ago1743574823IN
Nucleus Vision Token
0 ETH0.000023320.71574439
Transfer221793932025-04-02 6:19:5916 days ago1743574799IN
Nucleus Vision Token
0 ETH0.000037040.74555559
Approve220976402025-03-21 20:28:3528 days ago1742588915IN
Nucleus Vision Token
0 ETH0.000033560.69330171
Transfer220884182025-03-20 13:37:2329 days ago1742477843IN
Nucleus Vision Token
0 ETH0.000099362
Transfer220778922025-03-19 2:19:2331 days ago1742350763IN
Nucleus Vision Token
0 ETH0.00002980.6
Approve220777412025-03-19 1:48:5931 days ago1742348939IN
Nucleus Vision Token
0 ETH0.00002360.89445524
Approve220571682025-03-16 4:50:4733 days ago1742100647IN
Nucleus Vision Token
0 ETH0.000033350.6852133
Transfer220567662025-03-16 3:29:5934 days ago1742095799IN
Nucleus Vision Token
0 ETH0.000034590.69603741
Approve220510912025-03-15 8:29:5934 days ago1742027399IN
Nucleus Vision Token
0 ETH0.000118152.4305162
Approve220413372025-03-13 23:48:4736 days ago1741909727IN
Nucleus Vision Token
0 ETH0.000145692.99342845
Approve220390642025-03-13 16:12:3536 days ago1741882355IN
Nucleus Vision Token
0 ETH0.00004150.85408783
Approve220389372025-03-13 15:47:1136 days ago1741880831IN
Nucleus Vision Token
0 ETH0.000048441.00274491
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Transfer51518482018-02-25 4:32:152609 days ago1519533135  Contract Creation0 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
NucleusVisionToken

Compiler Version
v0.4.19+commit.c4cbbb05

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2018-02-25
*/

pragma solidity ^0.4.18;

contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) public view returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}

contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  /**
  * @dev transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[msg.sender]);

    // SafeMath.sub will throw if there is not enough balance.
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
    return true;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) public view returns (uint256 balance) {
    return balances[_owner];
  }

}

contract Ownable {
  address public owner;


  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() public {
    owner = msg.sender;
  }


  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }


  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param newOwner The address to transfer ownership to.
   */
  function transferOwnership(address newOwner) public onlyOwner {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  /**
   * @dev Modifier to make a function callable only when the contract is not paused.
   */
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  /**
   * @dev Modifier to make a function callable only when the contract is paused.
   */
  modifier whenPaused() {
    require(paused);
    _;
  }

  /**
   * @dev called by the owner to pause, triggers stopped state
   */
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    Pause();
  }

  /**
   * @dev called by the owner to unpause, returns to normal state
   */
  function unpause() onlyOwner whenPaused public {
    paused = false;
    Unpause();
  }
}

library SafeMath {
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    if (a == 0) {
      return 0;
    }
    uint256 c = a * b;
    assert(c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return c;
  }

  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) public view returns (uint256);
  function transferFrom(address from, address to, uint256 value) public returns (bool);
  function approve(address spender, uint256 value) public returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) internal allowed;


  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   *
   * Beware that changing an allowance with this method brings the risk that someone may use both the old
   * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
   * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   * @return A uint256 specifying the amount of tokens still available for the spender.
   */
  function allowance(address _owner, address _spender) public view returns (uint256) {
    return allowed[_owner][_spender];
  }

  /**
   * @dev Increase the amount of tokens that an owner allowed to a spender.
   *
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _addedValue The amount of tokens to increase the allowance by.
   */
  function increaseApproval(address _spender, uint _addedValue) public returns (bool) {
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  /**
   * @dev Decrease the amount of tokens that an owner allowed to a spender.
   *
   * approve should be called when allowed[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _subtractedValue The amount of tokens to decrease the allowance by.
   */
  function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {
    uint oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

contract MintableToken is StandardToken, Ownable {
  event Mint(address indexed to, uint256 amount);
  event MintFinished();

  bool public mintingFinished = false;


  modifier canMint() {
    require(!mintingFinished);
    _;
  }

  /**
   * @dev Function to mint tokens
   * @param _to The address that will receive the minted tokens.
   * @param _amount The amount of tokens to mint.
   * @return A boolean that indicates if the operation was successful.
   */
  function mint(address _to, uint256 _amount) onlyOwner canMint public returns (bool) {
    totalSupply = totalSupply.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    Mint(_to, _amount);
    Transfer(address(0), _to, _amount);
    return true;
  }

  /**
   * @dev Function to stop minting new tokens.
   * @return True if the operation was successful.
   */
  function finishMinting() onlyOwner canMint public returns (bool) {
    mintingFinished = true;
    MintFinished();
    return true;
  }
}

contract NucleusVisionToken is MintableToken {
  string public constant name = "NucleusVision";
  string public constant symbol = "nCash";
  uint8 public constant decimals = 18;

  // Total supply of nCash tokens is 10 Billion
  uint256 public constant MAX_SUPPLY = 10 * 1000 * 1000 * 1000 * (10 ** uint256(decimals));
  // Bit that controls whether the token can be transferred / traded
  bool public unlocked = false;

  event NucleusVisionTokenUnlocked();

  /**
   * @dev totalSupply is set via the minting process
   */
  function NucleusVisionToken() public {
  }

  function mint(address to, uint256 amount) onlyOwner public returns (bool) {
    require(totalSupply + amount <= MAX_SUPPLY);
    return super.mint(to, amount);
  }

  function unlockToken() onlyOwner public {
    require (!unlocked);
    unlocked = true;
    NucleusVisionTokenUnlocked();
  }

  // Overriding basic ERC-20 specification that lets people transfer/approve tokens.
  function transfer(address to, uint256 value) public returns (bool) {
    require(unlocked);
    return super.transfer(to, value);
  }

  function transferFrom(address from, address to, uint256 value) public returns (bool) {
    require(unlocked);
    return super.transferFrom(from, to, value);
  }

  function approve(address spender, uint256 value) public returns (bool) {
    require(unlocked);
    return super.approve(spender, value);
  }

  // Overriding StandardToken functions that lets people transfer/approve tokens.
  function increaseApproval(address spender, uint addedValue) public returns (bool) {
    require(unlocked);
    return super.increaseApproval(spender, addedValue);
  }

  function decreaseApproval(address spender, uint subtractedValue) public returns (bool) {
    require(unlocked);
    return super.decreaseApproval(spender, subtractedValue);
  }

}

Contract Security Audit

Contract ABI

API
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Founded at Harvard University, Nucleus Vision is an IoT-based, contactless identification system that empowers retailers to identify and better serve their customers.

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