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Approve242811282026-01-21 5:39:4716 days ago1768973987IN
Quadrant Protocol: eQUAD Token
0 ETH0.00009482.05615643
Approve242696742026-01-19 15:19:3518 days ago1768835975IN
Quadrant Protocol: eQUAD Token
0 ETH0.000001790.03863451
Approve242437712026-01-16 0:42:5921 days ago1768524179IN
Quadrant Protocol: eQUAD Token
0 ETH0.000005440.11759123
Approve242225422026-01-13 1:33:3524 days ago1768268015IN
Quadrant Protocol: eQUAD Token
0 ETH0.000004610.1
Approve241738952026-01-06 6:38:5931 days ago1767681539IN
Quadrant Protocol: eQUAD Token
0 ETH0.000012790.53184675
Approve241426532026-01-01 22:05:2335 days ago1767305123IN
Quadrant Protocol: eQUAD Token
0 ETH0.000002510.05432274
Approve241324122025-12-31 11:49:1137 days ago1767181751IN
Quadrant Protocol: eQUAD Token
0 ETH0.000003440.07489683
Approve241057692025-12-27 18:30:3540 days ago1766860235IN
Quadrant Protocol: eQUAD Token
0 ETH0.000001850.04012748
Approve241009292025-12-27 2:17:2341 days ago1766801843IN
Quadrant Protocol: eQUAD Token
0 ETH0.000005880.12772005
Approve240946212025-12-26 5:09:4742 days ago1766725787IN
Quadrant Protocol: eQUAD Token
0 ETH0.000001350.02915425
Approve240272802025-12-16 19:32:5951 days ago1765913579IN
Quadrant Protocol: eQUAD Token
0 ETH0.000093862.0351578
Approve239568672025-12-06 22:42:2361 days ago1765060943IN
Quadrant Protocol: eQUAD Token
0 ETH0.000002630.09
Approve239410182025-12-04 17:00:3564 days ago1764867635IN
Quadrant Protocol: eQUAD Token
0 ETH0.000007080.15365341
Approve239366352025-12-04 1:08:4764 days ago1764810527IN
Quadrant Protocol: eQUAD Token
0 ETH0.000005520.11971743
Approve239344452025-12-03 17:37:3565 days ago1764783455IN
Quadrant Protocol: eQUAD Token
0 ETH0.000004170.09
Approve239218612025-12-01 23:18:1166 days ago1764631091IN
Quadrant Protocol: eQUAD Token
0 ETH0.000024840.53860266
Approve238535782025-11-22 9:24:3576 days ago1763803475IN
Quadrant Protocol: eQUAD Token
0 ETH0.000049571.07542403
Approve238376842025-11-20 3:49:1178 days ago1763610551IN
Quadrant Protocol: eQUAD Token
0 ETH0.000027780.59881863
Approve238373042025-11-20 2:32:3578 days ago1763605955IN
Quadrant Protocol: eQUAD Token
0 ETH0.000012860.2772664
Approve238373022025-11-20 2:32:1178 days ago1763605931IN
Quadrant Protocol: eQUAD Token
0 ETH0.000101232.18200133
Approve238373012025-11-20 2:31:5978 days ago1763605919IN
Quadrant Protocol: eQUAD Token
0 ETH0.000055181.189471
Approve238070862025-11-15 20:51:1182 days ago1763239871IN
Quadrant Protocol: eQUAD Token
0 ETH0.000049431.06538441
Approve238059212025-11-15 16:56:1183 days ago1763225771IN
Quadrant Protocol: eQUAD Token
0 ETH0.000008140.17548446
Approve237937642025-11-14 0:09:5984 days ago1763078999IN
Quadrant Protocol: eQUAD Token
0 ETH0.000010680.23177438
Transfer237933602025-11-13 22:48:2384 days ago1763074103IN
Quadrant Protocol: eQUAD Token
0 ETH0.000011920.23093847
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Contract Source Code Verified (Exact Match)

Contract Name:
QuadToken

Compiler Version
v0.4.24+commit.e67f0147

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2018-07-24
*/

pragma solidity ^0.4.18;


/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
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;
  }

}


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  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;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  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;
  }

  /**
  * @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  function totalSupply() public view returns (uint256);
  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);
}


/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
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);
}




/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20Basic, Ownable {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  uint256 totalSupply_;

  bool transfersEnabled;

  mapping(address => bool) transfersEnabledOverride;

  /**
  * @dev total number of tokens in existence
  */
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  /**
  * @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]);
    require(transfersEnabledOverride[msg.sender] || transfersEnabled);

    // 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];
  }

  /**
   * @dev Function to enable token transfer
   */
  function enableTransfer() public onlyOwner {

    require(!transfersEnabled);
    transfersEnabled = true;
  }

  /**
   * @dev Function to disable token transfer
   */
  function disableTransfer() public onlyOwner {

    require(transfersEnabled);
    transfersEnabled = false;
  }

  /**
   * @dev Function to allow token transfer to specific address
   * @param newAddress - to allow this address to transfer token
   */
   function allowTokenTransfer(address newAddress) public onlyOwner {

     transfersEnabledOverride[newAddress] = true;

   }

  /**
   * @dev Function to restrict token transfer to specific address
   * @param oldAddress - to restrict this address to transfer token
   */
   function restrictTokenTransfer(address oldAddress) public onlyOwner {

     transfersEnabledOverride[oldAddress] = false;

   }

}







/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * @dev https://github.com/ethereum/EIPs/issues/20
 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
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]);
    require(transfersEnabledOverride[_from] || transfersEnabled);

    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;
  }

}



/**
 * @title QuadToken
 * @dev VERC20 Token, where all Quad tokens are pre-assigned to the creator.
 * Token transfer and transferFrom are enabled only after owners permission
 * Note they can later distribute these tokens as they wish using `transfer` and other
 * `StandardToken` functions.
 */
contract QuadToken is StandardToken {

  string public constant name = "QuadrantProtocol"; // solium-disable-line uppercase
  string public constant symbol = "eQUAD"; // solium-disable-line uppercase
  uint8 public constant decimals = 18; // solium-disable-line uppercase

  uint256 public constant INITIAL_SUPPLY = 1000000000 * (10 ** uint256(decimals));

  /**
   * @dev Constructor that gives msg.sender all of existing tokens.
   */
  function QuadToken() public {
    totalSupply_ = INITIAL_SUPPLY;
    balances[msg.sender] = INITIAL_SUPPLY;
    Transfer(0x0, msg.sender, INITIAL_SUPPLY);
  }

}

Contract Security Audit

Contract ABI

API
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Swarm Source

bzzr://c27cb66c6c5a74179ff7dd4967d6f0adc6f1ad4f6a43c5e106f330d511c5d2df

Block Uncle Number Difficulty Gas Used Reward
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OVERVIEW

Quadrant is a blockchain-based protocol that enables the access, creation, and distribution of data products and services with authenticity and provenance at its core.

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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.