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From
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Transfer217523622025-02-01 14:47:1143 hrs ago1738421231IN
Nucleus Vision Token
0 ETH0.000153133.08017034
Transfer217522902025-02-01 14:32:4743 hrs ago1738420367IN
Nucleus Vision Token
0 ETH0.000159043.19898316
Transfer217519392025-02-01 13:22:2344 hrs ago1738416143IN
Nucleus Vision Token
0 ETH0.000134232.69985712
Approve217489892025-02-01 3:29:232 days ago1738380563IN
Nucleus Vision Token
0 ETH0.00005651.16734815
Approve217488882025-02-01 3:08:592 days ago1738379339IN
Nucleus Vision Token
0 ETH0.000072851.50734791
Approve217480862025-02-01 0:27:472 days ago1738369667IN
Nucleus Vision Token
0 ETH0.000079071.63593637
Approve217364222025-01-30 9:20:474 days ago1738228847IN
Nucleus Vision Token
0 ETH0.000078461.62366493
Approve217352312025-01-30 5:22:114 days ago1738214531IN
Nucleus Vision Token
0 ETH0.000140992.91550916
Transfer217305192025-01-29 13:35:234 days ago1738157723IN
Nucleus Vision Token
0 ETH0.000219564.41619248
Transfer217305162025-01-29 13:34:474 days ago1738157687IN
Nucleus Vision Token
0 ETH0.000236964.34750678
Transfer217305102025-01-29 13:33:354 days ago1738157615IN
Nucleus Vision Token
0 ETH0.00021773.99509468
Approve217220972025-01-28 9:22:116 days ago1738056131IN
Nucleus Vision Token
0 ETH0.000253415.21307323
Transfer217220722025-01-28 9:17:116 days ago1738055831IN
Nucleus Vision Token
0 ETH0.000235644.74200338
Transfer217123882025-01-27 0:51:477 days ago1737939107IN
Nucleus Vision Token
0 ETH0.00022877.01152905
Transfer216820112025-01-22 19:06:3511 days ago1737572795IN
Nucleus Vision Token
0 ETH0.000631211.58310197
Transfer216648072025-01-20 9:27:5914 days ago1737365279IN
Nucleus Vision Token
0 ETH0.0014416928.99744412
Approve216370202025-01-16 12:23:1117 days ago1737030191IN
Nucleus Vision Token
0 ETH0.000481769.91296256
Transfer216331912025-01-15 23:33:1118 days ago1736983991IN
Nucleus Vision Token
0 ETH0.000277535.58487087
Transfer216245522025-01-14 18:34:5919 days ago1736879699IN
Nucleus Vision Token
0 ETH0.0010935322
Transfer216081722025-01-12 11:40:2321 days ago1736682023IN
Nucleus Vision Token
0 ETH0.000210924.24352161
Transfer216027802025-01-11 17:37:4722 days ago1736617067IN
Nucleus Vision Token
0 ETH0.000309935.68754946
Transfer215918072025-01-10 4:51:2324 days ago1736484683IN
Nucleus Vision Token
0 ETH0.000292365.36626874
Approve215913862025-01-10 3:26:4724 days ago1736479607IN
Nucleus Vision Token
0 ETH0.000216364.44531002
Approve215795272025-01-08 11:42:2325 days ago1736336543IN
Nucleus Vision Token
0 ETH0.000356677.33894825
Approve215652422025-01-06 11:52:2327 days ago1736164343IN
Nucleus Vision Token
0 ETH0.000476129.7967117
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51518482018-02-25 4:32:152535 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

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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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