Contrato de Fábrica No genera Tokens

Hola, soy nuevo en el desarrollo de DApp. Estoy usando un contrato de fábrica y ese contrato de fábrica está creando un contrato de tokens múltiples. Cuando creo un nuevo contrato de token, genera la transacción, pero cuando agrego esa dirección de token a mi cuenta para ver mis tokens generados, muestra la información del token, pero después de agregar ese token, el número total de tokens. siendo 0 no el suministro total. Además, no puedo enviar esos tokens a ninguna otra cuenta porque el número total de tokens es 0. A continuación se muestra el código.

Contrato de fábrica

pragma solidity ^0.4.11;

import "./WILDToken.sol";

contract Bakery {

  // index of created contracts

  address[] public contracts;

  // useful to know the row count in contracts index

  function getContractCount() 
    public
    constant
    returns(uint contractCount)
  {
    return contracts.length;
  }

  // deploy a new contract

  function newToken()
    public
    returns(address newContract)
  {
    WILDToken c = new WILDToken();
    contracts.push(c);
    return c;
  }
}

Contrato de token

pragma solidity ^0.4.11;

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
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;
  }
}

/**
 * @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) constant returns (uint256);
  function transfer(address to, uint256 value) 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) returns (bool) {
    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) 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) returns (bool);
  function approve(address spender, uint256 value) 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 amout of tokens to be transfered
   */
  function transferFrom(address _from, address _to, uint256 _value) returns (bool) {
    var _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[_to] = balances[_to].add(_value);
    balances[_from] = balances[_from].sub(_value);
    allowed[_from][msg.sender] = _allowance.sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Aprove the passed address to spend the specified amount of tokens on behalf 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) returns (bool) {

    // 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
    require((_value == 0) || (allowed[msg.sender][_spender] == 0));

    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 specifing the amount of tokens still available for the spender.
   */
  function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
    return allowed[_owner][_spender];
  }

}


/**
 * @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 WILDToken is StandardToken {

  string public constant name = "Marshmellow Token";
  string public constant symbol = "MMT";
  uint256 public constant decimals = 18;

  uint256 public constant INITIAL_SUPPLY = 300000000 * 10**18;

  /**
   * @dev Contructor that gives msg.sender all of existing tokens.
   */
  function WILDToken() {
    totalSupply = INITIAL_SUPPLY;
    balances[msg.sender] = INITIAL_SUPPLY;
  }

}

Cualquier ayuda será apreciada. Gracias

Respuestas (1)

Su constructor asigna todos los tokens a msg.sender. Creo que es algo bastante razonable, pero en este caso, msg.senderes el contrato de fábrica.

Recomendaría cambiar el contrato de fábrica para transferirle todos sus tokens después de implementar el contrato de token:

function newToken()
    public
    returns(address newContract)
  {
    WILDToken c = new WILDToken();
    // Send all tokens to the caller
    c.transfer(msg.sender, c.balanceOf(this));
    contracts.push(c);
    return c;
  }
Ok, eso se ve bien, pero una cosa que quiero aclarar, la dirección del token generado no es en realidad una dirección, es una transacción que aparece en la cuenta en metamask. ¿Es esta podría ser la razón de 0 tokens?
Ah, sí, también deberá obtener la dirección del contrato creado. Las transacciones no tienen valores de retorno, por lo que return cno está haciendo nada útil.
¿Hay alguna forma de obtener la dirección del contrato recién generado usando una función cada vez que se genera el nuevo contrato usando la función "newToken"?
La forma típica de hacer esto es registrar un evento y leerlo del recibo de la transacción.
Probé el código anterior para enviar tokens a la persona que llama, pero no funciona. Gracias por sus respuestas anteriores. Eso me ayudó mucho