Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

• library SafeMath
•    - function div(uint256 a, uint256 b)
•    - function sub(uint256 a, uint256 b)
•    - function add(uint256 a, uint256 b)
•    - function assert(bool assertion)
•  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 ERC20 is ERC20Basic
•    - function allowance(address owner, add ...
•    - function transferFrom(address from, a ...
•    - function approve(address spender, uin ...
•  contract StandardToken is BasicTok ...
•    - function transferFrom(address _from, ...
•    - function approve(address _spender, ui ...
•    - function allowance(address _owner, ad ...
•  contract Ownable
•    - function Ownable()
•    - function transferOwnership(address ne ...
•  contract MintableToken is Standard ...
•    - function mint(address _to, uint256 _a ...
•    - function finishMinting()
•  contract FEIToken is Ownable, Mint ... *

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2018-10-16
*/

pragma solidity ^0.4.23;

/**
 * Math operations with safety checks
 */
library SafeMath {
function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal constant 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 constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

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

  function assert(bool assertion) internal {
    if (!assertion) {
      throw;
    }
  }
}


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) constant returns (uint256);
  function transfer(address to, uint256 value);
  event Transfer(address indexed from, address indexed to, 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;

  /**
   * @dev Fix for the ERC20 short address attack.
   */
  modifier onlyPayloadSize(uint size) {
     if(msg.data.length < size + 4) {
       throw;
     }
     _;
  }

  /**
  * @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) onlyPayloadSize(2 * 32) {
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  * @return An uint representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) constant 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) constant returns (uint256);
  function transferFrom(address from, address to, uint256 value);
  function approve(address spender, uint256 value);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}


/**
 * @title Standard ERC20 token
 *
 * @dev Implemantation of the basic standart 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 BasicToken, ERC20 {

  mapping (address => mapping (address => uint256)) 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 uint the amout of tokens to be transfered
   */
  function transferFrom(address _from, address _to, uint256 _value) onlyPayloadSize(3 * 32) {
    var _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
    // if (_value > _allowance) throw;

    balances[_to] = balances[_to].add(_value);
    balances[_from] = balances[_from].sub(_value);
    allowed[_from][msg.sender] = _allowance.sub(_value);
    Transfer(_from, _to, _value);
  }

  /**
   * @dev Aprove the passed address to spend the specified amount of tokens on beahlf of msg.sender.
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) {

    // 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
    if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) throw;

    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
  }

  /**
   * @dev Function to check the amount of tokens than 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 uint specifing the amount of tokens still avaible for the spender.
   */
  function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
    return allowed[_owner][_spender];
  }

}


/**
 * @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;


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() {
    owner = msg.sender;
  }


  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    if (msg.sender != owner) {
      throw;
    }
    _;
  }


  /**
   * @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) onlyOwner {
    if (newOwner != address(0)) {
      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 value);
  event MintFinished();

  bool public mintingFinished = false;
  uint256 public totalSupply = 0;


  modifier canMint() {
    if(mintingFinished) throw;
    _;
  }

  /**
   * @dev Function to mint tokens
   * @param _to The address that will recieve 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 returns (bool) {
    totalSupply = totalSupply.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    Mint(_to, _amount);
    return true;
  }

  /**
   * @dev Function to stop minting new tokens.
   * @return True if the operation was successful.
   */
  function finishMinting() onlyOwner returns (bool) {
    mintingFinished = true;
    MintFinished();
    return true;
  }
}



/**
 * @title FEIToken
 */
contract FEIToken is Ownable, MintableToken {
  using SafeMath for uint256;
  string public name = "FeiCoin";
  string public symbol = "FC";
  uint public decimals = 8;

}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":true,"inputs":[],"name":"mintingFinished","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","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":[],"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":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"mint","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":false,"inputs":[],"name":"finishMinting","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","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":[],"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":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[],"name":"MintFinished","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":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}]

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

0x6080604052600436106100cf5763ffffffff7c010000000000000000000000000000000000000000000000000000000060003504166305d2035b81146100d457806306fdde03146100fd578063095ea7b31461018757806318160ddd146101ad57806323b872dd146101d4578063313ce567146101fe57806340c10f191461021357806370a08231146102375780637d64bcb4146102585780638da5cb5b1461026d57806395d89b411461029e578063a9059cbb146102b3578063dd62ed3e146102d7578063f2fde38b146102fe575b600080fd5b3480156100e057600080fd5b506100e961031f565b604080519115158252519081900360200190f35b34801561010957600080fd5b50610112610340565b6040805160208082528351818301528351919283929083019185019080838360005b8381101561014c578181015183820152602001610134565b50505050905090810190601f1680156101795780820380516001836020036101000a031916815260200191505b509250505060405180910390f35b34801561019357600080fd5b506101ab600160a060020a03600435166024356103ce565b005b3480156101b957600080fd5b506101c261046b565b60408051918252519081900360200190f35b3480156101e057600080fd5b506101ab600160a060020a0360043581169060243516604435610471565b34801561020a57600080fd5b506101c261058e565b34801561021f57600080fd5b506100e9600160a060020a0360043516602435610594565b34801561024357600080fd5b506101c2600160a060020a0360043516610670565b34801561026457600080fd5b506100e961068b565b34801561027957600080fd5b50610282610709565b60408051600160a060020a039092168252519081900360200190f35b3480156102aa57600080fd5b50610112610718565b3480156102bf57600080fd5b506101ab600160a060020a0360043516602435610773565b3480156102e357600080fd5b506101c2600160a060020a036004358116906024351661082f565b34801561030a57600080fd5b506101ab600160a060020a036004351661085a565b60035474010000000000000000000000000000000000000000900460ff1681565b6005805460408051602060026001851615610100026000190190941693909304601f810184900484028201840190925281815292918301828280156103c65780601f1061039b576101008083540402835291602001916103c6565b820191906000526020600020905b8154815290600101906020018083116103a957829003601f168201915b505050505081565b80158015906103ff5750336000908152600260209081526040808320600160a060020a038616845290915290205415155b1561040957600080fd5b336000818152600260209081526040808320600160a060020a03871680855290835292819020859055805185815290519293927f8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925929181900390910190a35050565b60045481565b60006060606436101561048357600080fd5b600160a060020a038086166000908152600260209081526040808320338452825280832054938816835260019091529020549092506104c8908463ffffffff6108ac16565b600160a060020a0380861660009081526001602052604080822093909355908716815220546104fd908463ffffffff6108c416565b600160a060020a038616600090815260016020526040902055610526828463ffffffff6108c416565b600160a060020a03808716600081815260026020908152604080832033845282529182902094909455805187815290519288169391927fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef929181900390910190a35050505050565b60075481565b600354600090600160a060020a031633146105ae57600080fd5b60035474010000000000000000000000000000000000000000900460ff16156105d657600080fd5b6004546105e9908363ffffffff6108ac16565b600455600160a060020a038316600090815260016020526040902054610615908363ffffffff6108ac16565b600160a060020a038416600081815260016020908152604091829020939093558051858152905191927f0f6798a560793a54c3bcfe86a93cde1e73087d944c0ea20544137d412139688592918290030190a250600192915050565b600160a060020a031660009081526001602052604090205490565b600354600090600160a060020a031633146106a557600080fd5b6003805474ff00000000000000000000000000000000000000001916740100000000000000000000000000000000000000001790556040517fae5184fba832cb2b1f702aca6117b8d265eaf03ad33eb133f19dde0f5920fa0890600090a150600190565b600354600160a060020a031681565b6006805460408051602060026001851615610100026000190190941693909304601f810184900484028201840190925281815292918301828280156103c65780601f1061039b576101008083540402835291602001916103c6565b6040604436101561078357600080fd5b336000908152600160205260409020546107a3908363ffffffff6108c416565b3360009081526001602052604080822092909255600160a060020a038516815220546107d5908363ffffffff6108ac16565b600160a060020a0384166000818152600160209081526040918290209390935580518581529051919233927fddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef9281900390910190a3505050565b600160a060020a03918216600090815260026020908152604080832093909416825291909152205490565b600354600160a060020a0316331461087157600080fd5b600160a060020a038116156108a9576003805473ffffffffffffffffffffffffffffffffffffffff1916600160a060020a0383161790555b50565b60008282016108bd848210156108d8565b9392505050565b60006108d2838311156108d8565b50900390565b8015156108a957600080fd00a165627a7a7230582016bf7b447ecdfa18f48724598a29d2365492df2c60f84a7636b4af2e38c9f8da0029

bzzr://16bf7b447ecdfa18f48724598a29d2365492df2c60f84a7636b4af2e38c9f8da