Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

• library SafeMath
•    - function mul(uint256 a, uint256 b)
•    - function div(uint256 a, uint256 b)
•    - function sub(uint256 a, uint256 b)
•    - function add(uint256 a, uint256 b)
•  contract Ownable
•    - function Ownable()
•    - function transferOwnership(address ne ...
•  contract ERC20Basic
•    - function balanceOf(address who)
•    - function transfer(address to, uint256 ...
•  contract BasicToken is ERC20Basic
•    - function transfer(address _to, uint25 ...
•    - function balanceOf(address _owner)
•  contract BurnableToken is BasicTok ...
•    - function burn(uint256 _value)
•  contract ERC20 is ERC20Basic
•    - function allowance(address owner, add ...
•    - function transferFrom(address from, a ...
•    - function approve(address spender, uin ...
•  contract UTNP is BasicToken, Burna ... *
•    - function UTNP()
•    - function transferFrom(address _from, ...
•    - function approve(address _spender, ui ...
•    - function allowance(address _owner, ad ...
•    - function grantBurner(address _burner, ...
•    - function burn(uint256 _value)

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2018-01-13
*/

pragma solidity ^0.4.13;

/**
 * @title UTN-P ERC20 token by Universa Blockchain.
 *
 * @dev Based on OpenZeppelin framework.
 *
 * Features:
 *
 * * ERC20 compatibility, with token details as properties.
 * * total supply: 4997891952 (initially given to the contract author).
 * * decimals: 18
 * * BurnableToken: some addresses are allowed to burn tokens.
 * * “third-party smart contract trading protection”: transferFrom/approve/allowance methods are present but do nothing.
 * * TimeLock: implemented externally (in TokenTimelock contract), some tokens are time-locked for 3 months.
 * * Bulk send: implemented externally (in BulkSender contract), some tokens are time-locked for 3 months.
 */

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 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 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 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 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 UTNP is BasicToken, BurnableToken, ERC20, Ownable {

    string public constant name = "UTN-P: Universa Token";
    string public constant symbol = "UTNP";
    uint8 public constant decimals = 18;
    string public constant version = "1.0";

    uint256 constant INITIAL_SUPPLY_UTN = 4997891952;

    /// @dev whether an address is permitted to perform burn operations.
    mapping(address => bool) public isBurner;

    /**
     * @dev Constructor that:
     * * gives all of existing tokens to the message sender;
     * * initializes the burners (also adding the message sender);
     */
    function UTNP() public {
        totalSupply = INITIAL_SUPPLY_UTN * (10 ** uint256(decimals));
        balances[msg.sender] = totalSupply;

        isBurner[msg.sender] = true;
    }

    /**
     * @dev Standard method to comply with ERC20 interface;
     * prevents some Ethereum-contract-initiated operations.
     */
    function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
        return false;
    }

    /**
     * @dev Standard method to comply with ERC20 interface;
     * prevents some Ethereum-contract-initiated operations.
     */
    function approve(address _spender, uint256 _value) public returns (bool) {
        return false;
    }

    /**
     * @dev Standard method to comply with ERC20 interface;
     * prevents some Ethereum-contract-initiated operations.
     */
    function allowance(address _owner, address _spender) public view returns (uint256) {
        return 0;
    }

    /**
     * @dev Grant or remove burn permissions. Only owner can do that!
     */
    function grantBurner(address _burner, bool _value) public onlyOwner {
        isBurner[_burner] = _value;
    }

    /**
     * @dev Throws if called by any account other than the burner.
     */
    modifier onlyBurner() {
        require(isBurner[msg.sender]);
        _;
    }

    /**
     * @dev Burns a specific amount of tokens.
     * Only an address listed in `isBurner` can do this.
     * @param _value The amount of token to be burned.
     */
    function burn(uint256 _value) public onlyBurner {
        super.burn(_value);
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"burn","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"isBurner","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"version","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_burner","type":"address"},{"name":"_value","type":"bool"}],"name":"grantBurner","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"burner","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}]

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

bzzr://664588c96d34e5a74eaad24b1388f142ca884acdcabe989c3f0cfe99ef788900