pragma solidity ^0.4.24;

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Basic.sol

/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * 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);
}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol

/**
 * @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
  );
}

// File: openzeppelin-solidity/contracts/token/ERC20/DetailedERC20.sol

/**
 * @title DetailedERC20 token
 * @dev The decimals are only for visualization purposes.
 * All the operations are done using the smallest and indivisible token unit,
 * just as on Ethereum all the operations are done in wei.
 */
contract DetailedERC20 is ERC20 {
  string public name;
  string public symbol;
  uint8 public decimals;

  constructor(string _name, string _symbol, uint8 _decimals) public {
    name = _name;
    symbol = _symbol;
    decimals = _decimals;
  }
}

// File: openzeppelin-solidity/contracts/math/SafeMath.sol

/**
 * @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 c) {
    // Gas optimization: this is cheaper than asserting 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (_a == 0) {
      return 0;
    }

    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 _a / _b;
  }

  /**
  * @dev Subtracts 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 c) {
    c = _a + _b;
    assert(c >= _a);
    return c;
  }
}

// File: openzeppelin-solidity/contracts/token/ERC20/BasicToken.sol

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) internal balances;

  uint256 internal 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(_value <= balances[msg.sender]);
    require(_to != address(0));

    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 view returns (uint256) {
    return balances[_owner];
  }

}

// File: openzeppelin-solidity/contracts/token/ERC20/StandardToken.sol

/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * https://github.com/ethereum/EIPs/issues/20
 * 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(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);
    require(_to != address(0));

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].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
    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,
    uint256 _addedValue
  )
    public
    returns (bool)
  {
    allowed[msg.sender][_spender] = (
      allowed[msg.sender][_spender].add(_addedValue));
    emit 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,
    uint256 _subtractedValue
  )
    public
    returns (bool)
  {
    uint256 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;
  }

}

// File: openzeppelin-solidity/contracts/ownership/Ownable.sol

/**
 * @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 OwnershipRenounced(address indexed previousOwner);
  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 relinquish control of the contract.
   * @notice Renouncing to ownership will leave the contract without an owner.
   * It will not be possible to call the functions with the `onlyOwner`
   * modifier anymore.
   */
  function renounceOwnership() public onlyOwner {
    emit OwnershipRenounced(owner);
    owner = address(0);
  }

  /**
   * @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) public onlyOwner {
    _transferOwnership(_newOwner);
  }

  /**
   * @dev Transfers control of the contract to a newOwner.
   * @param _newOwner The address to transfer ownership to.
   */
  function _transferOwnership(address _newOwner) internal {
    require(_newOwner != address(0));
    emit OwnershipTransferred(owner, _newOwner);
    owner = _newOwner;
  }
}

// File: openzeppelin-solidity/contracts/token/ERC20/MintableToken.sol

/**
 * @title Mintable token
 * @dev Simple ERC20 Token example, with mintable token creation
 * 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 amount);
  event MintFinished();

  bool public mintingFinished = false;


  modifier canMint() {
    require(!mintingFinished);
    _;
  }

  modifier hasMintPermission() {
    require(msg.sender == owner);
    _;
  }

  /**
   * @dev Function to mint tokens
   * @param _to The address that will receive 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
  )
    public
    hasMintPermission
    canMint
    returns (bool)
  {
    totalSupply_ = totalSupply_.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    emit Mint(_to, _amount);
    emit Transfer(address(0), _to, _amount);
    return true;
  }

  /**
   * @dev Function to stop minting new tokens.
   * @return True if the operation was successful.
   */
  function finishMinting() public onlyOwner canMint returns (bool) {
    mintingFinished = true;
    emit MintFinished();
    return true;
  }
}

// File: openzeppelin-solidity/contracts/access/rbac/Roles.sol

/**
 * @title Roles
 * @author Francisco Giordano (@frangio)
 * @dev Library for managing addresses assigned to a Role.
 * See RBAC.sol for example usage.
 */
library Roles {
  struct Role {
    mapping (address => bool) bearer;
  }

  /**
   * @dev give an address access to this role
   */
  function add(Role storage _role, address _addr)
    internal
  {
    _role.bearer[_addr] = true;
  }

  /**
   * @dev remove an address' access to this role
   */
  function remove(Role storage _role, address _addr)
    internal
  {
    _role.bearer[_addr] = false;
  }

  /**
   * @dev check if an address has this role
   * // reverts
   */
  function check(Role storage _role, address _addr)
    internal
    view
  {
    require(has(_role, _addr));
  }

  /**
   * @dev check if an address has this role
   * @return bool
   */
  function has(Role storage _role, address _addr)
    internal
    view
    returns (bool)
  {
    return _role.bearer[_addr];
  }
}

// File: openzeppelin-solidity/contracts/access/rbac/RBAC.sol

/**
 * @title RBAC (Role-Based Access Control)
 * @author Matt Condon (@Shrugs)
 * @dev Stores and provides setters and getters for roles and addresses.
 * Supports unlimited numbers of roles and addresses.
 * See //contracts/mocks/RBACMock.sol for an example of usage.
 * This RBAC method uses strings to key roles. It may be beneficial
 * for you to write your own implementation of this interface using Enums or similar.
 */
contract RBAC {
  using Roles for Roles.Role;

  mapping (string => Roles.Role) private roles;

  event RoleAdded(address indexed operator, string role);
  event RoleRemoved(address indexed operator, string role);

  /**
   * @dev reverts if addr does not have role
   * @param _operator address
   * @param _role the name of the role
   * // reverts
   */
  function checkRole(address _operator, string _role)
    public
    view
  {
    roles[_role].check(_operator);
  }

  /**
   * @dev determine if addr has role
   * @param _operator address
   * @param _role the name of the role
   * @return bool
   */
  function hasRole(address _operator, string _role)
    public
    view
    returns (bool)
  {
    return roles[_role].has(_operator);
  }

  /**
   * @dev add a role to an address
   * @param _operator address
   * @param _role the name of the role
   */
  function addRole(address _operator, string _role)
    internal
  {
    roles[_role].add(_operator);
    emit RoleAdded(_operator, _role);
  }

  /**
   * @dev remove a role from an address
   * @param _operator address
   * @param _role the name of the role
   */
  function removeRole(address _operator, string _role)
    internal
  {
    roles[_role].remove(_operator);
    emit RoleRemoved(_operator, _role);
  }

  /**
   * @dev modifier to scope access to a single role (uses msg.sender as addr)
   * @param _role the name of the role
   * // reverts
   */
  modifier onlyRole(string _role)
  {
    checkRole(msg.sender, _role);
    _;
  }

  /**
   * @dev modifier to scope access to a set of roles (uses msg.sender as addr)
   * @param _roles the names of the roles to scope access to
   * // reverts
   *
   * @TODO - when solidity supports dynamic arrays as arguments to modifiers, provide this
   *  see: https://github.com/ethereum/solidity/issues/2467
   */
  // modifier onlyRoles(string[] _roles) {
  //     bool hasAnyRole = false;
  //     for (uint8 i = 0; i < _roles.length; i++) {
  //         if (hasRole(msg.sender, _roles[i])) {
  //             hasAnyRole = true;
  //             break;
  //         }
  //     }

  //     require(hasAnyRole);

  //     _;
  // }
}

// File: openzeppelin-solidity/contracts/token/ERC20/RBACMintableToken.sol

/**
 * @title RBACMintableToken
 * @author Vittorio Minacori (@vittominacori)
 * @dev Mintable Token, with RBAC minter permissions
 */
contract RBACMintableToken is MintableToken, RBAC {
  /**
   * A constant role name for indicating minters.
   */
  string public constant ROLE_MINTER = "minter";

  /**
   * @dev override the Mintable token modifier to add role based logic
   */
  modifier hasMintPermission() {
    checkRole(msg.sender, ROLE_MINTER);
    _;
  }

  /**
   * @dev add a minter role to an address
   * @param _minter address
   */
  function addMinter(address _minter) public onlyOwner {
    addRole(_minter, ROLE_MINTER);
  }

  /**
   * @dev remove a minter role from an address
   * @param _minter address
   */
  function removeMinter(address _minter) public onlyOwner {
    removeRole(_minter, ROLE_MINTER);
  }
}

// File: openzeppelin-solidity/contracts/token/ERC20/BurnableToken.sol

/**
 * @title Burnable Token
 * @dev Token that can be irreversibly burned (destroyed).
 */
contract BurnableToken is BasicToken {

  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 {
    _burn(msg.sender, _value);
  }

  function _burn(address _who, uint256 _value) internal {
    require(_value <= balances[_who]);
    // 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

    balances[_who] = balances[_who].sub(_value);
    totalSupply_ = totalSupply_.sub(_value);
    emit Burn(_who, _value);
    emit Transfer(_who, address(0), _value);
  }
}

// File: openzeppelin-solidity/contracts/AddressUtils.sol

/**
 * Utility library of inline functions on addresses
 */
library AddressUtils {

  /**
   * Returns whether the target address is a contract
   * @dev This function will return false if invoked during the constructor of a contract,
   * as the code is not actually created until after the constructor finishes.
   * @param _addr address to check
   * @return whether the target address is a contract
   */
  function isContract(address _addr) internal view returns (bool) {
    uint256 size;
    // XXX Currently there is no better way to check if there is a contract in an address
    // than to check the size of the code at that address.
    // See https://ethereum.stackexchange.com/a/14016/36603
    // for more details about how this works.
    // TODO Check this again before the Serenity release, because all addresses will be
    // contracts then.
    // solium-disable-next-line security/no-inline-assembly
    assembly { size := extcodesize(_addr) }
    return size > 0;
  }

}

// File: openzeppelin-solidity/contracts/introspection/ERC165.sol

/**
 * @title ERC165
 * @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
 */
interface ERC165 {

  /**
   * @notice Query if a contract implements an interface
   * @param _interfaceId The interface identifier, as specified in ERC-165
   * @dev Interface identification is specified in ERC-165. This function
   * uses less than 30,000 gas.
   */
  function supportsInterface(bytes4 _interfaceId)
    external
    view
    returns (bool);
}

// File: openzeppelin-solidity/contracts/introspection/SupportsInterfaceWithLookup.sol

/**
 * @title SupportsInterfaceWithLookup
 * @author Matt Condon (@shrugs)
 * @dev Implements ERC165 using a lookup table.
 */
contract SupportsInterfaceWithLookup is ERC165 {

  bytes4 public constant InterfaceId_ERC165 = 0x01ffc9a7;
  /**
   * 0x01ffc9a7 ===
   *   bytes4(keccak256('supportsInterface(bytes4)'))
   */

  /**
   * @dev a mapping of interface id to whether or not it's supported
   */
  mapping(bytes4 => bool) internal supportedInterfaces;

  /**
   * @dev A contract implementing SupportsInterfaceWithLookup
   * implement ERC165 itself
   */
  constructor()
    public
  {
    _registerInterface(InterfaceId_ERC165);
  }

  /**
   * @dev implement supportsInterface(bytes4) using a lookup table
   */
  function supportsInterface(bytes4 _interfaceId)
    external
    view
    returns (bool)
  {
    return supportedInterfaces[_interfaceId];
  }

  /**
   * @dev private method for registering an interface
   */
  function _registerInterface(bytes4 _interfaceId)
    internal
  {
    require(_interfaceId != 0xffffffff);
    supportedInterfaces[_interfaceId] = true;
  }
}

// File: contracts/token/ERC1363/ERC1363.sol

/**
 * @title ERC1363 interface
 * @author Vittorio Minacori (@vittominacori)
 * @dev Interface for a Payable Token contract as defined in
 *  https://github.com/ethereum/EIPs/issues/1363
 */
contract ERC1363 is ERC20, ERC165 {
  /*
   * Note: the ERC-165 identifier for this interface is 0x4bbee2df.
   * 0x4bbee2df ===
   *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
   *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
   *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
   *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)'))
   */

  /*
   * Note: the ERC-165 identifier for this interface is 0xfb9ec8ce.
   * 0xfb9ec8ce ===
   *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
   *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
   */

  /**
   * @notice Transfer tokens from `msg.sender` to another address
   *  and then call `onTransferReceived` on receiver
   * @param _to address The address which you want to transfer to
   * @param _value uint256 The amount of tokens to be transferred
   * @return true unless throwing
   */
  function transferAndCall(address _to, uint256 _value) public returns (bool);

  /**
   * @notice Transfer tokens from `msg.sender` to another address
   *  and then call `onTransferReceived` on receiver
   * @param _to address The address which you want to transfer to
   * @param _value uint256 The amount of tokens to be transferred
   * @param _data bytes Additional data with no specified format, sent in call to `_to`
   * @return true unless throwing
   */
  function transferAndCall(address _to, uint256 _value, bytes _data) public returns (bool); // solium-disable-line max-len

  /**
   * @notice Transfer tokens from one address to another
   *  and then call `onTransferReceived` on receiver
   * @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
   * @return true unless throwing
   */
  function transferFromAndCall(address _from, address _to, uint256 _value) public returns (bool); // solium-disable-line max-len


  /**
   * @notice Transfer tokens from one address to another
   *  and then call `onTransferReceived` on receiver
   * @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
   * @param _data bytes Additional data with no specified format, sent in call to `_to`
   * @return true unless throwing
   */
  function transferFromAndCall(address _from, address _to, uint256 _value, bytes _data) public returns (bool); // solium-disable-line max-len, arg-overflow

  /**
   * @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
   *  and then call `onApprovalReceived` on spender
   *  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 address The address which will spend the funds
   * @param _value uint256 The amount of tokens to be spent
   */
  function approveAndCall(address _spender, uint256 _value) public returns (bool); // solium-disable-line max-len

  /**
   * @notice Approve the passed address to spend the specified amount of tokens on behalf of msg.sender
   *  and then call `onApprovalReceived` on spender
   *  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 address The address which will spend the funds
   * @param _value uint256 The amount of tokens to be spent
   * @param _data bytes Additional data with no specified format, sent in call to `_spender`
   */
  function approveAndCall(address _spender, uint256 _value, bytes _data) public returns (bool); // solium-disable-line max-len
}

// File: contracts/token/ERC1363/ERC1363Receiver.sol

/**
 * @title ERC1363Receiver interface
 * @author Vittorio Minacori (@vittominacori)
 * @dev Interface for any contract that wants to support transferAndCall or transferFromAndCall
 *  from ERC1363 token contracts as defined in
 *  https://github.com/ethereum/EIPs/issues/1363
 */
contract ERC1363Receiver {
  /*
   * Note: the ERC-165 identifier for this interface is 0x88a7ca5c.
   * 0x88a7ca5c === bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))
   */

  /**
   * @notice Handle the receipt of ERC1363 tokens
   * @dev Any ERC1363 smart contract calls this function on the recipient
   *  after a `transfer` or a `transferFrom`. This function MAY throw to revert and reject the
   *  transfer. Return of other than the magic value MUST result in the
   *  transaction being reverted.
   *  Note: the contract address is always the message sender.
   * @param _operator address The address which called `transferAndCall` or `transferFromAndCall` function
   * @param _from address The address which are token transferred from
   * @param _value uint256 The amount of tokens transferred
   * @param _data bytes Additional data with no specified format
   * @return `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))`
   *  unless throwing
   */
  function onTransferReceived(address _operator, address _from, uint256 _value, bytes _data) external returns (bytes4); // solium-disable-line max-len, arg-overflow
}

// File: contracts/token/ERC1363/ERC1363Spender.sol

/**
 * @title ERC1363Spender interface
 * @author Vittorio Minacori (@vittominacori)
 * @dev Interface for any contract that wants to support approveAndCall
 *  from ERC1363 token contracts as defined in
 *  https://github.com/ethereum/EIPs/issues/1363
 */
contract ERC1363Spender {
  /*
   * Note: the ERC-165 identifier for this interface is 0x7b04a2d0.
   * 0x7b04a2d0 === bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))
   */

  /**
   * @notice Handle the approval of ERC1363 tokens
   * @dev Any ERC1363 smart contract calls this function on the recipient
   *  after an `approve`. This function MAY throw to revert and reject the
   *  approval. Return of other than the magic value MUST result in the
   *  transaction being reverted.
   *  Note: the contract address is always the message sender.
   * @param _owner address The address which called `approveAndCall` function
   * @param _value uint256 The amount of tokens to be spent
   * @param _data bytes Additional data with no specified format
   * @return `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))`
   *  unless throwing
   */
  function onApprovalReceived(address _owner, uint256 _value, bytes _data) external returns (bytes4); // solium-disable-line max-len
}

// File: contracts/token/ERC1363/ERC1363BasicToken.sol

// solium-disable-next-line max-len






/**
 * @title ERC1363BasicToken
 * @author Vittorio Minacori (@vittominacori)
 * @dev Implementation of an ERC1363 interface
 */
contract ERC1363BasicToken is SupportsInterfaceWithLookup, ERC1363 { // solium-disable-line max-len
  using AddressUtils for address;

  /*
   * Note: the ERC-165 identifier for this interface is 0x4bbee2df.
   * 0x4bbee2df ===
   *   bytes4(keccak256('transferAndCall(address,uint256)')) ^
   *   bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
   *   bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
   *   bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)'))
   */
  bytes4 internal constant InterfaceId_ERC1363Transfer = 0x4bbee2df;

  /*
   * Note: the ERC-165 identifier for this interface is 0xfb9ec8ce.
   * 0xfb9ec8ce ===
   *   bytes4(keccak256('approveAndCall(address,uint256)')) ^
   *   bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
   */
  bytes4 internal constant InterfaceId_ERC1363Approve = 0xfb9ec8ce;

  // Equals to `bytes4(keccak256("onTransferReceived(address,address,uint256,bytes)"))`
  // which can be also obtained as `ERC1363Receiver(0).onTransferReceived.selector`
  bytes4 private constant ERC1363_RECEIVED = 0x88a7ca5c;

  // Equals to `bytes4(keccak256("onApprovalReceived(address,uint256,bytes)"))`
  // which can be also obtained as `ERC1363Spender(0).onApprovalReceived.selector`
  bytes4 private constant ERC1363_APPROVED = 0x7b04a2d0;

  constructor() public {
    // register the supported interfaces to conform to ERC1363 via ERC165
    _registerInterface(InterfaceId_ERC1363Transfer);
    _registerInterface(InterfaceId_ERC1363Approve);
  }

  function transferAndCall(
    address _to,
    uint256 _value
  )
    public
    returns (bool)
  {
    return transferAndCall(_to, _value, "");
  }

  function transferAndCall(
    address _to,
    uint256 _value,
    bytes _data
  )
    public
    returns (bool)
  {
    require(transfer(_to, _value));
    require(
      checkAndCallTransfer(
        msg.sender,
        _to,
        _value,
        _data
      )
    );
    return true;
  }

  function transferFromAndCall(
    address _from,
    address _to,
    uint256 _value
  )
    public
    returns (bool)
  {
    // solium-disable-next-line arg-overflow
    return transferFromAndCall(_from, _to, _value, "");
  }

  function transferFromAndCall(
    address _from,
    address _to,
    uint256 _value,
    bytes _data
  )
    public
    returns (bool)
  {
    require(transferFrom(_from, _to, _value));
    require(
      checkAndCallTransfer(
        _from,
        _to,
        _value,
        _data
      )
    );
    return true;
  }

  function approveAndCall(
    address _spender,
    uint256 _value
  )
    public
    returns (bool)
  {
    return approveAndCall(_spender, _value, "");
  }

  function approveAndCall(
    address _spender,
    uint256 _value,
    bytes _data
  )
    public
    returns (bool)
  {
    approve(_spender, _value);
    require(
      checkAndCallApprove(
        _spender,
        _value,
        _data
      )
    );
    return true;
  }

  /**
   * @dev Internal function to invoke `onTransferReceived` on a target address
   *  The call is not executed if the target address is not a contract
   * @param _from address Representing the previous owner of the given token value
   * @param _to address Target address that will receive the tokens
   * @param _value uint256 The amount mount of tokens to be transferred
   * @param _data bytes Optional data to send along with the call
   * @return whether the call correctly returned the expected magic value
   */
  function checkAndCallTransfer(
    address _from,
    address _to,
    uint256 _value,
    bytes _data
  )
    internal
    returns (bool)
  {
    if (!_to.isContract()) {
      return false;
    }
    bytes4 retval = ERC1363Receiver(_to).onTransferReceived(
      msg.sender, _from, _value, _data
    );
    return (retval == ERC1363_RECEIVED);
  }

  /**
   * @dev Internal function to invoke `onApprovalReceived` on a target address
   *  The call is not executed if the target address is not a contract
   * @param _spender address The address which will spend the funds
   * @param _value uint256 The amount of tokens to be spent
   * @param _data bytes Optional data to send along with the call
   * @return whether the call correctly returned the expected magic value
   */
  function checkAndCallApprove(
    address _spender,
    uint256 _value,
    bytes _data
  )
    internal
    returns (bool)
  {
    if (!_spender.isContract()) {
      return false;
    }
    bytes4 retval = ERC1363Spender(_spender).onApprovalReceived(
      msg.sender, _value, _data
    );
    return (retval == ERC1363_APPROVED);
  }
}

// File: contracts/safe/TokenRecover.sol

contract TokenRecover is Ownable {

  /**
   * @dev It's a safe function allowing to recover any ERC20 sent into the contract for error
   * @param _tokenAddress address The token contract address
   * @param _tokens Number of tokens to be sent
   * @return bool
   */
  function transferAnyERC20Token(
    address _tokenAddress,
    uint256 _tokens
  )
  public
  onlyOwner
  returns (bool success)
  {
    return ERC20Basic(_tokenAddress).transfer(owner, _tokens);
  }
}

// File: contracts/token/GastroAdvisorToken.sol

contract GastroAdvisorToken is DetailedERC20, RBACMintableToken, BurnableToken, ERC1363BasicToken, TokenRecover { // solium-disable-line max-len

  modifier canTransfer() {
    require(mintingFinished);
    _;
  }

  constructor()
  DetailedERC20("GastroAdvisorToken", "FORK", 18)
  ERC1363BasicToken()
  public
  {}

  function transfer(
    address _to,
    uint256 _value
  )
  public
  canTransfer
  returns (bool)
  {
    return super.transfer(_to, _value);
  }

  function transferFrom(
    address _from,
    address _to,
    uint256 _value
  )
  public
  canTransfer
  returns (bool)
  {
    return super.transferFrom(_from, _to, _value);
  }

  /**
   * @dev add a minter role to an array of addresses
   * @param _minters address[]
   */
  function addMinters(address[] _minters) public onlyOwner {
    require(_minters.length > 0);
    for (uint i = 0; i < _minters.length; i++) {
      addRole(_minters[i], ROLE_MINTER);
    }
  }
}