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Transfer236268812025-10-21 15:38:4757 days ago1761061127IN
ValueCyber: VCT Token
0 ETH0.000089851.89529681
Transfer231294042025-08-13 3:20:47127 days ago1755055247IN
ValueCyber: VCT Token
0 ETH0.000031230.65863137
Transfer145862612022-04-14 22:35:461343 days ago1649975746IN
ValueCyber: VCT Token
0 ETH0.0018934239.93810626
Transfer128498202021-07-18 9:28:491614 days ago1626600529IN
ValueCyber: VCT Token
0 ETH0.0004837113.00000145
Transfer126256412021-06-13 10:44:441649 days ago1623581084IN
ValueCyber: VCT Token
0 ETH0.000261045
Transfer116159662021-01-08 19:25:241804 days ago1610133924IN
ValueCyber: VCT Token
0 ETH0.0046654689.00000134
Transfer111571072020-10-30 8:33:141875 days ago1604046794IN
ValueCyber: VCT Token
0 ETH0.0022819461
Transfer98575892020-04-12 12:51:372076 days ago1586695897IN
ValueCyber: VCT Token
0 ETH0.0008387316
Transfer98101612020-04-05 5:34:132083 days ago1586064853IN
ValueCyber: VCT Token
0 ETH0.0013133635.09687522
Transfer97832342020-04-01 2:13:322087 days ago1585707212IN
ValueCyber: VCT Token
0 ETH0.00003741
Transfer96286562020-03-08 4:37:172111 days ago1583642237IN
ValueCyber: VCT Token
0 ETH0.000329518.80000123
0x0a9059cb95650962020-02-27 10:11:502121 days ago1582798310IN
ValueCyber: VCT Token
0 ETH0.000185798.4
Transfer94692592020-02-12 16:33:532135 days ago1581525233IN
ValueCyber: VCT Token
0 ETH0.0005244510
Transfer94617812020-02-11 12:53:122137 days ago1581425592IN
ValueCyber: VCT Token
0 ETH0.000134456
Transfer94484792020-02-09 12:01:382139 days ago1581249698IN
ValueCyber: VCT Token
0 ETH0.000299278
Transfer93730742020-01-28 21:56:022150 days ago1580248562IN
ValueCyber: VCT Token
0 ETH0.000419368
Transfer93711622020-01-28 14:50:262150 days ago1580223026IN
ValueCyber: VCT Token
0 ETH0.000112263
Transfer93709582020-01-28 14:03:192150 days ago1580220199IN
ValueCyber: VCT Token
0 ETH0.000056111.5
Transfer91516172019-12-23 16:45:572186 days ago1577119557IN
ValueCyber: VCT Token
0 ETH0.00003741
Transfer91005532019-12-13 14:41:432196 days ago1576248103IN
ValueCyber: VCT Token
0 ETH0.000125083.34375
Transfer90032992019-11-26 8:51:342214 days ago1574758294IN
ValueCyber: VCT Token
0 ETH0.0007852315
Transfer89608902019-11-19 6:18:202221 days ago1574144300IN
ValueCyber: VCT Token
0 ETH0.000042661.92
Transfer89502242019-11-17 11:42:312223 days ago1573990951IN
ValueCyber: VCT Token
0 ETH0.0003715710
Transfer89452882019-11-16 15:56:292223 days ago1573919789IN
ValueCyber: VCT Token
0 ETH0.000048882.2
Transfer89445882019-11-16 13:17:152224 days ago1573910235IN
ValueCyber: VCT Token
0 ETH0.000886623.82
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Transfer48798342018-01-09 12:17:552900 days ago1515500275  Contract Creation0 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
VCBToken

Compiler Version
v0.4.18+commit.9cf6e910

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2018-01-09
*/

pragma solidity ^0.4.18;

/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
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);
}

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
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;
  }
}

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
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];
  }

}

/**
 * @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 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]);

    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 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 Mintable token
 * @dev Simple ERC20 Token example, with mintable token creation
 * @dev Issue: * https://github.com/OpenZeppelin/zeppelin-solidity/issues/120
 * Based on code by TokenMarketNet: https://github.com/TokenMarketNet/ico/blob/master/contracts/MintableToken.sol
 */

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;
  }
}

/**
 * @title Crowdsale
 * @dev Crowdsale is a base contract for managing a token crowdsale.
 * Crowdsales have a start and end timestamps, where investors can make
 * token purchases and the crowdsale will assign them tokens based
 * on a token per ETH rate. Funds collected are forwarded to a wallet
 * as they arrive.
 */
contract Crowdsale {
  using SafeMath for uint256;

  // The token being sold
  MintableToken public token;

  // start and end timestamps where investments are allowed (both inclusive)
  uint256 public startTime;
  uint256 public endTime;

  // address where funds are collected
  address public wallet;

  // how many token units a buyer gets per wei
  uint256 public rate;

  // amount of raised money in wei
  uint256 public weiRaised;

  /**
   * event for token purchase logging
   * @param purchaser who paid for the tokens
   * @param beneficiary who got the tokens
   * @param value weis paid for purchase
   * @param amount amount of tokens purchased
   */
  event TokenPurchase(address indexed purchaser, address indexed beneficiary, uint256 value, uint256 amount);


  function Crowdsale(uint256 _startTime, uint256 _endTime, uint256 _rate, address _wallet) public {
    require(_startTime >= now);
    require(_endTime >= _startTime);
    require(_rate > 0);
    require(_wallet != address(0));

    token = createTokenContract();
    startTime = _startTime;
    endTime = _endTime;
    rate = _rate;
    wallet = _wallet;
  }

  // creates the token to be sold.
  // override this method to have crowdsale of a specific mintable token.
  function createTokenContract() internal returns (MintableToken) {
    return new MintableToken();
  }


  // fallback function can be used to buy tokens
  function () external payable {
    buyTokens(msg.sender);
  }

  // low level token purchase function
  function buyTokens(address beneficiary) public payable {
    require(beneficiary != address(0));
    require(validPurchase());

    uint256 weiAmount = msg.value;

    // calculate token amount to be created
    uint256 tokens = weiAmount.mul(rate);

    // update state
    weiRaised = weiRaised.add(weiAmount);

    token.mint(beneficiary, tokens);
    TokenPurchase(msg.sender, beneficiary, weiAmount, tokens);

    forwardFunds();
  }

  // send ether to the fund collection wallet
  // override to create custom fund forwarding mechanisms
  function forwardFunds() internal {
    wallet.transfer(msg.value);
  }

  // @return true if the transaction can buy tokens
  function validPurchase() internal view returns (bool) {
    bool withinPeriod = now >= startTime && now <= endTime;
    bool nonZeroPurchase = msg.value != 0;
    return withinPeriod && nonZeroPurchase;
  }

  // @return true if crowdsale event has ended
  function hasEnded() public view returns (bool) {
    return now > endTime;
  }


}

contract DetailedERC20 is ERC20 {
  string public name;
  string public symbol;
  uint8 public decimals;

  function DetailedERC20(string _name, string _symbol, uint8 _decimals) public {
    name = _name;
    symbol = _symbol;
    decimals = _decimals;
  }
}

/**
 * @title Capped token
 * @dev Mintable token with a token cap.
 */

contract CappedToken is MintableToken {

  uint256 public cap;

  function CappedToken(uint256 _cap) public {
    require(_cap > 0);
    cap = _cap;
  }

  /**
   * @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) {
    require(totalSupply.add(_amount) <= cap);

    return super.mint(_to, _amount);
  }

}

/**
 * @title Burnable Token
 * @dev Token that can be irreversibly burned (destroyed).
 */
contract BurnableToken is BasicToken {

    event Burn(address indexed burner, uint256 value);

    /**
     * @dev Burns a specific amount of tokens.
     * @param _value The amount of token to be burned.
     */
    function burn(uint256 _value) public {
        require(_value <= balances[msg.sender]);
        // no need to require value <= totalSupply, since that would imply the
        // sender's balance is greater than the totalSupply, which *should* be an assertion failure

        address burner = msg.sender;
        balances[burner] = balances[burner].sub(_value);
        totalSupply = totalSupply.sub(_value);
        Burn(burner, _value);
    }
}

contract VCBToken is CappedToken, BurnableToken, DetailedERC20 {

    using SafeMath for uint256;

    uint8 constant DECIMALS = 18;
    uint  constant TOTALTOKEN = 1 * 10 ** (9 + uint(DECIMALS));
    string constant NAME = "ValueCyberToken";
    string constant SYM = "VCT";

    address constant PRESALE = 0x638a3C7dF9D1B3A56E19B92bE07eCC84b6475BD6;
    uint  constant PRESALETOKEN = 7 * 10 ** (8 + uint(DECIMALS));

    function VCBToken() CappedToken(TOTALTOKEN) DetailedERC20 (NAME, SYM, DECIMALS) public {
        
        balances[PRESALE] = PRESALETOKEN;
        totalSupply = totalSupply.add(PRESALETOKEN);
    }

}

contract VCBCrowdSale is Crowdsale, Ownable {

    using SafeMath for uint256;

    uint  constant RATIO = 9000;
    uint16 constant RATIODENO = 10000;
    uint constant SALELASTFOR = 31 days;
    address constant FUNDWALLET = 0x622969e0928fa6bEeda9f26F8a60D0b22Db7E6f1;

    mapping(address => uint16) giftList;

    event CrowdsaleFinalized();
    /**
    * event for token gift logging
    * @param beneficiary who got the gifted tokens
    * @param amount amount of tokens gifted
    */
    event TokenGift(address indexed beneficiary, uint256 amount);

    function VCBCrowdSale(uint256 start) Crowdsale(start, start + SALELASTFOR, RATIO, FUNDWALLET) public {
    }

    function createTokenContract() internal returns (MintableToken) {
        return new VCBToken();
    }

    //our crowdsale can stop at anytime, and then the totally crowsale contract is disappear
    function finalize(address _finaladdr) onlyOwner public {
        token.finishMinting();
        CrowdsaleFinalized();

        address finaladdr = FUNDWALLET;
        if (_finaladdr != address(0)) {
            finaladdr = _finaladdr;
        }

        selfdestruct(finaladdr);
    }  

    function giftTokens(address beneficiary) internal {
        uint256 weiAmount = msg.value;

        // calculate token amount to be created
        uint256 gifttokens = weiAmount.mul(giftList[beneficiary]).mul(rate).div(RATIODENO);
        if (gifttokens > 0) {

            //if gift token can't be sent, contract still fails
            token.mint(beneficiary, gifttokens);
            TokenGift(beneficiary, gifttokens);
        }

    }

    // override token purchase to send additional token for registered address
    function buyTokens(address beneficiary) public payable {

        super.buyTokens(beneficiary);

        //if address is in discount list, we gift it more tokens according to the ratio (in percentage)
        giftTokens(beneficiary);
    }

    function addGift(address beneficiary, uint16 giftratio) onlyOwner public {
        require(giftratio < RATIODENO);
        giftList[beneficiary] = giftratio;
    }

    /**
    * @dev Gets the gift ratio of the specified address.
    * @param _owner The address to query the gift ratio of.
    * @return An uint16 representing the ratio obtained by the passed address.
    */
    function giftRatioOf(address _owner) public view returns (uint16 ratio) {
        return giftList[_owner];
    }

    // directly mint tokens
    function preserveTokens(address preservecontract, uint256 amount) onlyOwner public {        
        token.mint(preservecontract, amount);
    }    

}

Contract Security Audit

Contract ABI

API
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Deployed Bytecode

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Swarm Source

bzzr://81bf8dcfae8c331da9bb072a9436c63c023cc9c4c4bfeb622b8f5bdb1e54f707

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OVERVIEW

ValueCyber is a blockchain system designed for the cooperation required by production and circulation in the digital economy era, and also a blockchain that tries to meet the technical and openness requirements for the next-generation blockchain.

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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.