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 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 ERC20 is ERC20Basic    - function allowance(address owner, add ...    - function transferFrom(address from, a ...    - function approve(address spender, uin ...  contract StandardToken is ERC20, B ...    - function transferFrom(address _from, ...    - function approve(address _spender, ui ...    - function allowance(address _owner, ad ...    - function increaseApproval (address _s ...    - function decreaseApproval (address _s ...  contract BurnableToken is Standard ...    - function burn(uint256 _value)  contract AIRx is BurnableToken, Ow ... *

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2018-07-07
*/

pragma solidity ^0.4.12;

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
  function mul(uint256 a, uint256 b) internal pure returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || 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 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.
   */
  constructor() 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) onlyOwner public {
    require(newOwner != address(0));
    emit OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }
}

/**
 * @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 constant returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  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 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));

    // SafeMath.sub will throw if there is not enough balance.
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    emit 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 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) public constant 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)) 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));

    uint256 _allowance = allowed[_from][msg.sender];

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

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = _allowance.sub(_value);
    emit 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;
    emit 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 constant returns (uint256 remaining) {
    return allowed[_owner][_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
   */
  function increaseApproval (address _spender, uint _addedValue) public
    returns (bool success) {
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  function decreaseApproval (address _spender, uint _subtractedValue) public
    returns (bool success) {
    uint oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }
}


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

    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 > 0);
        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);
        emit Burn(burner, _value);
        emit Transfer(burner, address(0), _value);
    }
}

contract AIRx is BurnableToken, Ownable {

    string public constant name = "Aircoins";
    string public constant symbol = "AIRx";
    uint public constant decimals = 8;
    // there is no problem in using * here instead of .mul()
    uint256 public constant initialSupply = 10000000000 * (10 ** uint256(decimals));

    // Constructors
    constructor () public {
        totalSupply = initialSupply;
        balances[msg.sender] = initialSupply; // Send all tokens to owner
        emit Transfer(0x0,msg.sender,initialSupply);
    }

}

• 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":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"initialSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"burn","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_subtractedValue","type":"uint256"}],"name":"decreaseApproval","outputs":[{"name":"success","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":"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":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_addedValue","type":"uint256"}],"name":"increaseApproval","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":"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":"burner","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Burn","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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

bzzr://4e055dbc96b86b7f6e6b8ea0a1ab043dc6e3fd00a3760209dd6a21ad6628f4bd