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Contract

0xee91e81927bb047eA0f4B24e43Dd5Dc0684827A0
 

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Transfer96154742020-03-06 4:29:371641 days ago1583468977IN
0xee91e819...0684827A0
0 ETH0.000193528
Transfer95294102020-02-21 22:49:351654 days ago1582325375IN
0xee91e819...0684827A0
0 ETH0.000078312
Transfer93935762020-02-01 1:33:401675 days ago1580520820IN
0xee91e819...0684827A0
0 ETH0.000321848
Transfer93935722020-02-01 1:33:061675 days ago1580520786IN
0xee91e819...0684827A0
0 ETH0.000080462
Transfer92206452020-01-05 13:28:091701 days ago1578230889IN
0xee91e819...0684827A0
0 ETH0.000058751.5
Transfer86746152019-10-04 8:34:281795 days ago1570178068IN
0xee91e819...0684827A0
0 ETH0.0003772710
Transfer86611792019-10-02 6:12:541797 days ago1569996774IN
0xee91e819...0684827A0
0 ETH0.0021644341
Transfer86326352019-09-27 18:59:481801 days ago1569610788IN
0xee91e819...0684827A0
0 ETH0.0007835920.7
Transfer85909832019-09-21 6:28:431808 days ago1569047323IN
0xee91e819...0684827A0
0 ETH0.0005530924.2
Transfer85302572019-09-11 19:04:311817 days ago1568228671IN
0xee91e819...0684827A0
0 ETH0.0011642122
Transfer84454452019-08-29 13:50:201830 days ago1567086620IN
0xee91e819...0684827A0
0 ETH0.0004534912
Transfer84117122019-08-24 7:47:471836 days ago1566632867IN
0xee91e819...0684827A0
0 ETH0.000102811.95
Transfer84082922019-08-23 18:56:241836 days ago1566586584IN
0xee91e819...0684827A0
0 ETH0.0007464914.175
Transfer84077462019-08-23 17:02:511836 days ago1566579771IN
0xee91e819...0684827A0
0 ETH0.000747414.175
Transfer83565722019-08-15 18:04:391844 days ago1565892279IN
0xee91e819...0684827A0
0 ETH0.000037721
Transfer83359012019-08-12 13:12:211847 days ago1565615541IN
0xee91e819...0684827A0
0 ETH0.0003772710
Transfer83112612019-08-08 17:14:241851 days ago1565284464IN
0xee91e819...0684827A0
0 ETH0.000285317.5625
Transfer82920002019-08-05 17:25:511854 days ago1565025951IN
0xee91e819...0684827A0
0 ETH0.00017924.75
Transfer82547602019-07-30 22:45:221860 days ago1564526722IN
0xee91e819...0684827A0
0 ETH0.000037721
Transfer82514972019-07-30 10:43:501861 days ago1564483430IN
0xee91e819...0684827A0
0 ETH0.000196885.21875
Transfer82467752019-07-29 17:15:101861 days ago1564420510IN
0xee91e819...0684827A0
0 ETH0.000135813.6
Transfer82082392019-07-23 17:26:421867 days ago1563902802IN
0xee91e819...0684827A0
0 ETH0.0003779110
Transfer82050262019-07-23 5:17:581868 days ago1563859078IN
0xee91e819...0684827A0
0 ETH0.0002279110
Transfer82015352019-07-22 16:29:051868 days ago1563812945IN
0xee91e819...0684827A0
0 ETH0.0004345911.5
Transfer81889892019-07-20 17:43:171870 days ago1563644597IN
0xee91e819...0684827A0
0 ETH0.0003772710
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Contract Source Code Verified (Exact Match)

Contract Name:
BINGToken

Compiler Version
v0.4.24+commit.e67f0147

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2018-07-25
*/

pragma solidity ^0.4.24;

/*
 * Creator: BING (Bitcoinbing) 
 */

/*
 * Abstract Token Smart Contract
 *
 */

 
 /*
 * Safe Math Smart Contract. 
 * https://github.com/OpenZeppelin/zeppelin-solidity/blob/master/contracts/math/SafeMath.sol
 */

contract 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 safeDiv(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 safeSub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

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




/**
 * ERC-20 standard token interface, as defined
 * <a href="http://github.com/ethereum/EIPs/issues/20">here</a>.
 */
contract Token {
  
  function totalSupply() constant returns (uint256 supply);
  function balanceOf(address _owner) constant returns (uint256 balance);
  function transfer(address _to, uint256 _value) returns (bool success);
  function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
  function approve(address _spender, uint256 _value) returns (bool success);
  function allowance(address _owner, address _spender) constant returns (uint256 remaining);
  event Transfer(address indexed _from, address indexed _to, uint256 _value);
  event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}



/**
 * Abstract Token Smart Contract that could be used as a base contract for
 * ERC-20 token contracts.
 */
contract AbstractToken is Token, SafeMath {
  /**
   * Create new Abstract Token contract.
   */
  function AbstractToken () {
    // Do nothing
  }
  
  /**
   * Get number of tokens currently belonging to given owner.
   *
   * @param _owner address to get number of tokens currently belonging to the
   *        owner of
   * @return number of tokens currently belonging to the owner of given address
   */
  function balanceOf(address _owner) constant returns (uint256 balance) {
    return accounts [_owner];
  }

  /**
   * Transfer given number of tokens from message sender to given recipient.
   *
   * @param _to address to transfer tokens to the owner of
   * @param _value number of tokens to transfer to the owner of given address
   * @return true if tokens were transferred successfully, false otherwise
   * accounts [_to] + _value > accounts [_to] for overflow check
   * which is already in safeMath
   */
  function transfer(address _to, uint256 _value) returns (bool success) {
    require(_to != address(0));
    if (accounts [msg.sender] < _value) return false;
    if (_value > 0 && msg.sender != _to) {
      accounts [msg.sender] = safeSub (accounts [msg.sender], _value);
      accounts [_to] = safeAdd (accounts [_to], _value);
    }
    emit Transfer (msg.sender, _to, _value);
    return true;
  }

  /**
   * Transfer given number of tokens from given owner to given recipient.
   *
   * @param _from address to transfer tokens from the owner of
   * @param _to address to transfer tokens to the owner of
   * @param _value number of tokens to transfer from given owner to given
   *        recipient
   * @return true if tokens were transferred successfully, false otherwise
   * accounts [_to] + _value > accounts [_to] for overflow check
   * which is already in safeMath
   */
  function transferFrom(address _from, address _to, uint256 _value)
  returns (bool success) {
    require(_to != address(0));
    if (allowances [_from][msg.sender] < _value) return false;
    if (accounts [_from] < _value) return false; 

    if (_value > 0 && _from != _to) {
	  allowances [_from][msg.sender] = safeSub (allowances [_from][msg.sender], _value);
      accounts [_from] = safeSub (accounts [_from], _value);
      accounts [_to] = safeAdd (accounts [_to], _value);
    }
    emit Transfer(_from, _to, _value);
    return true;
  }

  /**
   * Allow given spender to transfer given number of tokens from message sender.
   * @param _spender address to allow the owner of to transfer tokens from message sender
   * @param _value number of tokens to allow to transfer
   * @return true if token transfer was successfully approved, false otherwise
   */
   function approve (address _spender, uint256 _value) returns (bool success) {
    allowances [msg.sender][_spender] = _value;
    emit Approval (msg.sender, _spender, _value);
    return true;
  }

  /**
   * Tell how many tokens given spender is currently allowed to transfer from
   * given owner.
   *
   * @param _owner address to get number of tokens allowed to be transferred
   *        from the owner of
   * @param _spender address to get number of tokens allowed to be transferred
   *        by the owner of
   * @return number of tokens given spender is currently allowed to transfer
   *         from given owner
   */
  function allowance(address _owner, address _spender) constant
  returns (uint256 remaining) {
    return allowances [_owner][_spender];
  }

  /**
   * Mapping from addresses of token holders to the numbers of tokens belonging
   * to these token holders.
   */
  mapping (address => uint256) accounts;

  /**
   * Mapping from addresses of token holders to the mapping of addresses of
   * spenders to the allowances set by these token holders to these spenders.
   */
  mapping (address => mapping (address => uint256)) private allowances;
  
}


/**
 * BING token token smart contract.
 */
contract BINGToken is AbstractToken {
  /**
   * Maximum allowed number of tokens in circulation.
   * tokenSupply = tokensIActuallyWant * (10 ^ decimals)
   */
   
   
  uint256 constant MAX_TOKEN_COUNT = 1000000000 * (10**18);
   
  /**
   * Address of the owner of this smart contract.
   */
  address private owner;
  
  /**
   * Frozen account list holder
   */
  mapping (address => bool) private frozenAccount;

  /**
   * Current number of tokens in circulation.
   */
  uint256 tokenCount = 0;
  
 
  /**
   * True if tokens transfers are currently frozen, false otherwise.
   */
  bool frozen = false;
  
 
  /**
   * Create new token smart contract and make msg.sender the
   * owner of this smart contract.
   */
  function BINGToken () {
    owner = msg.sender;
  }

  /**
   * Get total number of tokens in circulation.
   *
   * @return total number of tokens in circulation
   */
  function totalSupply() constant returns (uint256 supply) {
    return tokenCount;
  }

  string constant public name = "Bitcoinbing";
  string constant public symbol = "BING";
  uint8 constant public decimals = 18;
  
  /**
   * Transfer given number of tokens from message sender to given recipient.
   * @param _to address to transfer tokens to the owner of
   * @param _value number of tokens to transfer to the owner of given address
   * @return true if tokens were transferred successfully, false otherwise
   */
  function transfer(address _to, uint256 _value) returns (bool success) {
    require(!frozenAccount[msg.sender]);
	if (frozen) return false;
    else return AbstractToken.transfer (_to, _value);
  }

  /**
   * Transfer given number of tokens from given owner to given recipient.
   *
   * @param _from address to transfer tokens from the owner of
   * @param _to address to transfer tokens to the owner of
   * @param _value number of tokens to transfer from given owner to given
   *        recipient
   * @return true if tokens were transferred successfully, false otherwise
   */
  function transferFrom(address _from, address _to, uint256 _value)
    returns (bool success) {
	require(!frozenAccount[_from]);
    if (frozen) return false;
    else return AbstractToken.transferFrom (_from, _to, _value);
  }

   /**
   * Change how many tokens given spender is allowed to transfer from message
   * spender.  In order to prevent double spending of allowance,
   * To change the approve amount you first have to reduce the addresses`
   * allowance to zero by calling `approve(_spender, 0)` if it is not
   * already 0 to mitigate the race condition described here:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   * @param _spender address to allow the owner of to transfer tokens from
   *        message sender
   * @param _value number of tokens to allow to transfer
   * @return true if token transfer was successfully approved, false otherwise
   */
  function approve (address _spender, uint256 _value)
    returns (bool success) {
	require(allowance (msg.sender, _spender) == 0 || _value == 0);
    return AbstractToken.approve (_spender, _value);
  }

  /**
   * Create _value new tokens and give new created tokens to msg.sender.
   * May only be called by smart contract owner.
   *
   * @param _value number of tokens to create
   * @return true if tokens were created successfully, false otherwise
   */
  function createTokens(uint256 _value)
    returns (bool success) {
    require (msg.sender == owner);

    if (_value > 0) {
      if (_value > safeSub (MAX_TOKEN_COUNT, tokenCount)) return false;
	  
      accounts [msg.sender] = safeAdd (accounts [msg.sender], _value);
      tokenCount = safeAdd (tokenCount, _value);
	  
	  // adding transfer event and _from address as null address
	  emit Transfer(0x0, msg.sender, _value);
	  
	  return true;
    }
	
	  return false;
    
  }
  

  /**
   * Set new owner for the smart contract.
   * May only be called by smart contract owner.
   *
   * @param _newOwner address of new owner of the smart contract
   */
  function setOwner(address _newOwner) {
    require (msg.sender == owner);

    owner = _newOwner;
  }

  /**
   * Freeze ALL token transfers.
   * May only be called by smart contract owner.
   */
  function freezeTransfers () {
    require (msg.sender == owner);

    if (!frozen) {
      frozen = true;
      emit Freeze ();
    }
  }

  /**
   * Unfreeze ALL token transfers.
   * May only be called by smart contract owner.
   */
  function unfreezeTransfers () {
    require (msg.sender == owner);

    if (frozen) {
      frozen = false;
      emit Unfreeze ();
    }
  }
  
  
  /*A user is able to unintentionally send tokens to a contract 
  * and if the contract is not prepared to refund them they will get stuck in the contract. 
  * The same issue used to happen for Ether too but new Solidity versions added the payable modifier to
  * prevent unintended Ether transfers. However, there’s no such mechanism for token transfers.
  * so the below function is created
  */
  
  function refundTokens(address _token, address _refund, uint256 _value) {
    require (msg.sender == owner);
    require(_token != address(this));
    AbstractToken token = AbstractToken(_token);
    token.transfer(_refund, _value);
    emit RefundTokens(_token, _refund, _value);
  }
  
  /**
   * Freeze specific account
   * May only be called by smart contract owner.
   */
  function freezeAccount(address _target, bool freeze) {
      require (msg.sender == owner);
	  require (msg.sender != _target);
      frozenAccount[_target] = freeze;
      emit FrozenFunds(_target, freeze);
 }

  /**
   * Logged when token transfers were frozen.
   */
  event Freeze ();

  /**
   * Logged when token transfers were unfrozen.
   */
  event Unfreeze ();
  
  /**
   * Logged when a particular account is frozen.
   */
  
  event FrozenFunds(address target, bool frozen);


  
  /**
   * when accidentally send other tokens are refunded
   */
  
  event RefundTokens(address _token, address _refund, uint256 _value);
}

Contract Security Audit

Contract ABI

[{"constant":false,"inputs":[],"name":"freezeTransfers","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"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":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_newOwner","type":"address"}],"name":"setOwner","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"supply","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":"success","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":"unfreezeTransfers","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":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"createTokens","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_token","type":"address"},{"name":"_refund","type":"address"},{"name":"_value","type":"uint256"}],"name":"refundTokens","outputs":[],"payable":false,"stateMutability":"nonpayable","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":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_target","type":"address"},{"name":"freeze","type":"bool"}],"name":"freezeAccount","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[],"name":"Freeze","type":"event"},{"anonymous":false,"inputs":[],"name":"Unfreeze","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"target","type":"address"},{"indexed":false,"name":"frozen","type":"bool"}],"name":"FrozenFunds","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"_token","type":"address"},{"indexed":false,"name":"_refund","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"RefundTokens","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"},{"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"}]

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Deployed Bytecode

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bzzr://4f0a6d96aab77b4a87f550d488ef1a7c3517dd18027bfddc4b5c849596912b04

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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.