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Contract Overview
Balance: 0 Ether
Ether Value: $0
Transactions: 12954 txns
Token Contract: EduCoin (EDU)
 Latest 25 txns from a total Of 12954 transactions
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TxHash Age From To Value [TxFee]
0x861d583463a37e7a95fee9061231fee98d8ff4cb6956cdbc681b85140ea52fa632 mins ago0x0a5ad4b6dc7a7cc99207c78b82719685d088486b  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.00069495014
0x3d717ddc9f0ba40aaa85ddb52134b4ca8643f44908d0edb0cd8a7e2e0412530f38 mins ago0xc7c68c3ca84cf27ca4b0ff37a27a53506b6417ae  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000104786
0x711d189a3f04af37bae2dd487c2db8431b6ca7b478baeb5aa83e162421b01b9539 mins ago0x64615152ce74044b67f0b5ace567d6533ec22789  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000331496923
0x55245427e7fdff2f2fcc777258aa15ccd7385f6a9722f7778fda8cf718ef891d2 hrs 55 mins ago0xb56a5fca2ff57195727081d5b0a79d3e4bf93e32  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000564196062
0xe96b1e2b262baf538a2ad36f5aceb649cad14f2ec9274c9e631b654f601385653 hrs 11 mins ago0xf211a86ee3161f061fb2af02d542b6cd49b3c11e  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.0004524553
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0x614ec2d04e3aa3d5b8d16de474f90b9844bc6e882b6f5908431c0d9e56d759cf3 hrs 32 mins ago0x078055004daf33f8d711579141a81ae5ddfa0969  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.0002168794
0xf47f0a551a175d7c5fcc6031778851760ef4667a339eb32cdcf3ba67d05eaded3 hrs 35 mins ago0xce70e9550a8b997e84dd10e15f45421207dcf64b  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000022457
0xf97e2afe3bab590bef3a9d8c8ec9e54c7f9f635e29298a8e2c46304e9c38e20d3 hrs 41 mins ago0xce70e9550a8b997e84dd10e15f45421207dcf64b  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000037393
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0xb86957499fcc8f8c019d28d452834358d950b8c70e1f2b4000baa0224c21edef5 hrs 12 mins ago0xeddf25e395eeea18ffa1c565888dc6d88d52dee1  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.002058062531
0x3a435e39776371bb6808232a1482b8220d52bb14172031af2f06eb20eb80b7bd6 hrs 14 mins ago0x078055004daf33f8d711579141a81ae5ddfa0969  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000346999137
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0xced8f1943eb2041ce3b96f7ce271c2317163579f68b0dc18716fd9e4f92e668d6 hrs 58 mins ago0x078055004daf33f8d711579141a81ae5ddfa0969  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000224865442
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0x0c885eabe115f26b5c78a5448490a6c16261bb822a663812cbc909da3531442f7 hrs 18 mins ago0x17ac32c3e93606b57ec381b836ff01738a591c31  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000475592218
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0x39c4f7a3e6cf7ebe4dc92ef8c2bdad5f9ffdf4751e8d2cd476a5f5a920c8c7d08 hrs 1 min ago0x078055004daf33f8d711579141a81ae5ddfa0969  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000424159388
0xaf8a872fc0e88df9dc241c13013ebfa4f15eaa34e75beaa139f9670216a53e3d8 hrs 3 mins ago0x078055004daf33f8d711579141a81ae5ddfa0969  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.000423433418
0x777791e6b53108e7b2e76d1a3023e4b55651b45ec77ab69f225274617b17564d8 hrs 27 mins ago0x6b7b2a8654ba73bb1755329513727dcde51109ac  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.00186645
0xbafbb1f3a1cc898725e1cc6a2889e0d999d59ba1480845ba91702f969850dd628 hrs 44 mins ago0x46705dfff24256421a05d056c29e81bdc09723b8  IN   0xf263292e14d9d8ecd55b58dad1f1df825a874b7c0 Ether0.001988502
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Contract Source Code Verified (Exact match)
Contract Name: EduCoin
Compiler Version: v0.4.18+commit.9cf6e910
Optimization Enabled: Yes
Runs (Optimiser):  200



  Contract Source Code   Find Similiar Contracts

pragma solidity ^0.4.18;


/**
 * @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 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 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 {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  uint256 totalSupply_;

  /**
  * @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]);

    // 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 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 SimpleToken
 * @dev Very simple ERC20 Token example, where all tokens are pre-assigned to the creator.
 * Note they can later distribute these tokens as they wish using `transfer` and other
 * `StandardToken` functions.
 */
contract EduCoin is StandardToken {

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

    uint256 public constant INITIAL_SUPPLY = 15 * (10 ** 9) * (10 ** uint256(decimals));

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

}

    Contract ABI  
[{"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":"INITIAL_SUPPLY","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_subtractedValue","type":"uint256"}],"name":"decreaseApproval","outputs":[{"name":"","type":"bool"}],"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":"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":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_addedValue","type":"uint256"}],"name":"increaseApproval","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"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"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":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}]

  Contract Creation Code Switch To Opcodes View
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   Swarm Source:
bzzr://fee5b4a1550304701664c3d98b5a0b6cff45ebce9f8897868fd90b0185d8adb3

 

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