pragma solidity ^0.4.11;
/**
* Token Batch assignments 
*/

 contract token {

    function balanceOf(address _owner) public returns (uint256 bal);
    function transfer(address _to, uint256 _value) public returns (bool); 
 
 }


/**
 * This contract is administered
 */

contract admined {
    address public admin; //Admin address is public
    /**
    * @dev This constructor set the initial admin of the contract
    */
    function admined() internal {
        admin = msg.sender; //Set initial admin to contract creator
        Admined(admin);
    }

    modifier onlyAdmin() { //A modifier to define admin-only functions
        require(msg.sender == admin);
        _;
    }

    /**
    * @dev Transfer the adminship of the contract
    * @param _newAdmin The address of the new admin.
    */
    function transferAdminship(address _newAdmin) onlyAdmin public { //Admin can be transfered
        require(_newAdmin != address(0));
        admin = _newAdmin;
        TransferAdminship(admin);
    }

    //All admin actions have a log for public review
    event TransferAdminship(address newAdmin);
    event Admined(address administrador);
}

contract Sender is admined {
    
    token public ERC20Token;
    mapping (address => bool) public flag; //Balances mapping
    uint256 public price; //with all decimals
    
    function Sender (token _addressOfToken, uint256 _initialPrice) public {
        price = _initialPrice;
        ERC20Token = _addressOfToken; 
    }

    function updatePrice(uint256 _newPrice) onlyAdmin public {
        price = _newPrice;
    }

    function contribute() public payable { //It takes an array of addresses and an amount
        require(flag[msg.sender] == false);
        flag[msg.sender] = true;
        ERC20Token.transfer(msg.sender,price);
    }

    function withdraw() onlyAdmin public{
        require(admin.send(this.balance));
        ERC20Token.transfer(admin, ERC20Token.balanceOf(this));
    }

    function() public payable {
        contribute();
    }
}

pragma solidity ^0.4.6;

library SafeMath {
  function mul(uint a, uint b) internal returns (uint) {
    uint c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint a, uint b) internal returns (uint) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    uint c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return c;
  }

  function sub(uint a, uint b) internal returns (uint) {
    assert(b <= a);
    return a - b;
  }

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

  function max64(uint64 a, uint64 b) internal constant returns (uint64) {
    return a >= b ? a : b;
  }

  function min64(uint64 a, uint64 b) internal constant returns (uint64) {
    return a < b ? a : b;
  }

  function max256(uint256 a, uint256 b) internal constant returns (uint256) {
    return a >= b ? a : b;
  }

  function min256(uint256 a, uint256 b) internal constant returns (uint256) {
    return a < b ? a : b;
  }

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

contract ERC20Basic {
  uint public totalSupply;
  function balanceOf(address who) constant returns (uint);
  function transfer(address to, uint value);
  event Transfer(address indexed from, address indexed to, uint value);
}

contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) constant returns (uint);
  function transferFrom(address from, address to, uint value);
  function approve(address spender, uint value);
  event Approval(address indexed owner, address indexed spender, uint value);
}

contract BasicToken is ERC20Basic {
  using SafeMath for uint;

  mapping(address => uint) balances;

  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, uint _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 (uint balance) {
    return balances[_owner];
  }

}

contract StandardToken is BasicToken, ERC20 {

  mapping (address => mapping (address => uint)) 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, uint _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, uint _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 (uint remaining) {
    return allowed[_owner][_spender];
  }

}

contract SimpleToken is StandardToken {

  string public name = "ETHERBTC";
  string public symbol = "ETHB";
  uint public decimals = 8;
  uint public INITIAL_SUPPLY = 2100000000000000;

  function SimpleToken() {
    totalSupply = INITIAL_SUPPLY;
    balances[msg.sender] = INITIAL_SUPPLY;
  }

}