pragma solidity ^0.4.21;

// File: contracts\utils\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.
    assembly { size := extcodesize(addr) }  // solium-disable-line security/no-inline-assembly
    return size > 0;
  }

}

// File: contracts\utils\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 OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  function Ownable() 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) public onlyOwner {
    require(newOwner != address(0));
    emit OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}

// File: contracts\utils\TrustedContractControl.sol

contract TrustedContractControl is Ownable{
  using AddressUtils for address;

  mapping (address => bool) public trustedContractList;

  modifier onlyTrustedContract(address _contractAddress) {
    require(trustedContractList[_contractAddress]);
    _;
  }

  event AddTrustedContract(address contractAddress);
  event RemoveTrustedContract(address contractAddress);


  function addTrustedContracts(address[] _contractAddress) onlyOwner public {
    for(uint i=0; i<_contractAddress.length; i++) {
      require(addTrustedContract(_contractAddress[i]));
    }
  }


  // need to add GirlSummon, GirlRecycle contract into the trusted list.
  function addTrustedContract(address _contractAddress) onlyOwner public returns (bool){
    require(!trustedContractList[_contractAddress]);
    require(_contractAddress.isContract());
    trustedContractList[_contractAddress] = true;
    emit AddTrustedContract(_contractAddress);
    return true;
  }

  function removeTrustedContract(address _contractAddress) onlyOwner public {
    require(trustedContractList[_contractAddress]);
    trustedContractList[_contractAddress] = false;
    emit RemoveTrustedContract(_contractAddress);
  }
}

// File: contracts\utils\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) {
    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: contracts\utils\Serialize.sol

contract Serialize {
    using SafeMath for uint256;
    function addAddress(uint _offst, bytes memory _output, address _input) internal pure returns(uint _offset) {
      assembly {
        mstore(add(_output, _offst), _input)
      }
      return _offst.sub(20);
    }

    function addUint(uint _offst, bytes memory _output, uint _input) internal pure returns (uint _offset) {
      assembly {
        mstore(add(_output, _offst), _input)
      }
      return _offst.sub(32);
    }

    function addUint8(uint _offst, bytes memory _output, uint _input) internal pure returns (uint _offset) {
      assembly {
        mstore(add(_output, _offst), _input)
      }
      return _offst.sub(1);
    }

    function addUint16(uint _offst, bytes memory _output, uint _input) internal pure returns (uint _offset) {
      assembly {
        mstore(add(_output, _offst), _input)
      }
      return _offst.sub(2);
    }

    function addUint64(uint _offst, bytes memory _output, uint _input) internal pure returns (uint _offset) {
      assembly {
        mstore(add(_output, _offst), _input)
      }
      return _offst.sub(8);
    }

    function getAddress(uint _offst, bytes memory _input) internal pure returns (address _output, uint _offset) {
      assembly {
        _output := mload(add(_input, _offst))
      }
      return (_output, _offst.sub(20));
    }

    function getUint(uint _offst, bytes memory _input) internal pure returns (uint _output, uint _offset) {
      assembly {
          _output := mload(add(_input, _offst))
      }
      return (_output, _offst.sub(32));
    }

    function getUint8(uint _offst, bytes memory _input) internal pure returns (uint8 _output, uint _offset) {
      assembly {
        _output := mload(add(_input, _offst))
      }
      return (_output, _offst.sub(1));
    }

    function getUint16(uint _offst, bytes memory _input) internal pure returns (uint16 _output, uint _offset) {
      assembly {
        _output := mload(add(_input, _offst))
      }
      return (_output, _offst.sub(2));
    }

    function getUint64(uint _offst, bytes memory _input) internal pure returns (uint64 _output, uint _offset) {
      assembly {
        _output := mload(add(_input, _offst))
      }
      return (_output, _offst.sub(8));
    }
}

// File: contracts\utils\Pausable.sol

/**
 * @title Pausable
 * @dev Base contract which allows children to implement an emergency stop mechanism.
 */
contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  /**
   * @dev Modifier to make a function callable only when the contract is not paused.
   */
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  /**
   * @dev Modifier to make a function callable only when the contract is paused.
   */
  modifier whenPaused() {
    require(paused);
    _;
  }

  /**
   * @dev called by the owner to pause, triggers stopped state
   */
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    emit Pause();
  }

  /**
   * @dev called by the owner to unpause, returns to normal state
   */
  function unpause() onlyOwner whenPaused public {
    paused = false;
    emit Unpause();
  }
}

// File: contracts\ERC721\ERC721Basic.sol

/**
 * @title ERC721 Non-Fungible Token Standard basic interface
 * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
 */
contract ERC721Basic {
  event Transfer(address indexed _from, address indexed _to, uint256 _tokenId);
  event Approval(address indexed _owner, address indexed _approved, uint256 _tokenId);
  event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);

  function balanceOf(address _owner) public view returns (uint256 _balance);
  function ownerOf(uint256 _tokenId) public view returns (address _owner);
  function exists(uint256 _tokenId) public view returns (bool _exists);

  function approve(address _to, uint256 _tokenId) public;
  function getApproved(uint256 _tokenId) public view returns (address _operator);

  function setApprovalForAll(address _operator, bool _approved) public;
  function isApprovedForAll(address _owner, address _operator) public view returns (bool);

  function transferFrom(address _from, address _to, uint256 _tokenId) public;
  function safeTransferFrom(address _from, address _to, uint256 _tokenId) public;
  function safeTransferFrom(
    address _from,
    address _to,
    uint256 _tokenId,
    bytes _data
  )
    public;
}

// File: contracts\ERC721\ERC721Receiver.sol

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 *  from ERC721 asset contracts.
 */
contract ERC721Receiver {
  /**
   * @dev Magic value to be returned upon successful reception of an NFT
   *  Equals to `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`,
   *  which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
   */
  bytes4 constant ERC721_RECEIVED = 0xf0b9e5ba;

  /**
   * @notice Handle the receipt of an NFT
   * @dev The ERC721 smart contract calls this function on the recipient
   *  after a `safetransfer`. This function MAY throw to revert and reject the
   *  transfer. This function MUST use 50,000 gas or less. Return of other
   *  than the magic value MUST result in the transaction being reverted.
   *  Note: the contract address is always the message sender.
   * @param _from The sending address
   * @param _tokenId The NFT identifier which is being transfered
   * @param _data Additional data with no specified format
   * @return `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`
   */
  function onERC721Received(address _from, uint256 _tokenId, bytes _data) public returns(bytes4);
}

// File: contracts\ERC721\ERC721BasicToken.sol

/**
 * @title ERC721 Non-Fungible Token Standard basic implementation
 * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
 */
contract ERC721BasicToken is ERC721Basic, Pausable {
  using SafeMath for uint256;
  using AddressUtils for address;

  // Equals to `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`
  // which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
  bytes4 constant ERC721_RECEIVED = 0xf0b9e5ba;

  // Mapping from token ID to owner
  mapping (uint256 => address) internal tokenOwner;

  // Mapping from token ID to approved address
  mapping (uint256 => address) internal tokenApprovals;

  // Mapping from owner to number of owned token
  mapping (address => uint256) internal ownedTokensCount;

  // Mapping from owner to operator approvals
  mapping (address => mapping (address => bool)) internal operatorApprovals;

  /**
   * @dev Guarantees msg.sender is owner of the given token
   * @param _tokenId uint256 ID of the token to validate its ownership belongs to msg.sender
   */
  modifier onlyOwnerOf(uint256 _tokenId) {
    require(ownerOf(_tokenId) == msg.sender);
    _;
  }

  /**
   * @dev Checks msg.sender can transfer a token, by being owner, approved, or operator
   * @param _tokenId uint256 ID of the token to validate
   */
  modifier canTransfer(uint256 _tokenId) {
    require(isApprovedOrOwner(msg.sender, _tokenId));
    _;
  }

  /**
   * @dev Gets the balance of the specified address
   * @param _owner address to query the balance of
   * @return uint256 representing the amount owned by the passed address
   */
  function balanceOf(address _owner) public view returns (uint256) {
    require(_owner != address(0));
    return ownedTokensCount[_owner];
  }

  /**
   * @dev Gets the owner of the specified token ID
   * @param _tokenId uint256 ID of the token to query the owner of
   * @return owner address currently marked as the owner of the given token ID
   */
  function ownerOf(uint256 _tokenId) public view returns (address) {
    address owner = tokenOwner[_tokenId];
    require(owner != address(0));
    return owner;
  }

  /**
   * @dev Returns whether the specified token exists
   * @param _tokenId uint256 ID of the token to query the existance of
   * @return whether the token exists
   */
  function exists(uint256 _tokenId) public view returns (bool) {
    address owner = tokenOwner[_tokenId];
    return owner != address(0);
  }

  /**
   * @dev Approves another address to transfer the given token ID
   * @dev The zero address indicates there is no approved address.
   * @dev There can only be one approved address per token at a given time.
   * @dev Can only be called by the token owner or an approved operator.
   * @param _to address to be approved for the given token ID
   * @param _tokenId uint256 ID of the token to be approved
   */
  function approve(address _to, uint256 _tokenId) public {
    address owner = ownerOf(_tokenId);
    require(_to != owner);
    require(msg.sender == owner || isApprovedForAll(owner, msg.sender));

    if (getApproved(_tokenId) != address(0) || _to != address(0)) {
      tokenApprovals[_tokenId] = _to;
      emit Approval(owner, _to, _tokenId);
    }
  }

  /**
   * @dev Gets the approved address for a token ID, or zero if no address set
   * @param _tokenId uint256 ID of the token to query the approval of
   * @return address currently approved for a the given token ID
   */
  function getApproved(uint256 _tokenId) public view returns (address) {
    return tokenApprovals[_tokenId];
  }

  /**
   * @dev Sets or unsets the approval of a given operator
   * @dev An operator is allowed to transfer all tokens of the sender on their behalf
   * @param _to operator address to set the approval
   * @param _approved representing the status of the approval to be set
   */
  function setApprovalForAll(address _to, bool _approved) public {
    require(_to != msg.sender);
    operatorApprovals[msg.sender][_to] = _approved;
    emit ApprovalForAll(msg.sender, _to, _approved);
  }

  /**
   * @dev Tells whether an operator is approved by a given owner
   * @param _owner owner address which you want to query the approval of
   * @param _operator operator address which you want to query the approval of
   * @return bool whether the given operator is approved by the given owner
   */
  function isApprovedForAll(address _owner, address _operator) public view returns (bool) {
    return operatorApprovals[_owner][_operator];
  }

  /**
   * @dev Transfers the ownership of a given token ID to another address
   * @dev Usage of this method is discouraged, use `safeTransferFrom` whenever possible
   * @dev Requires the msg sender to be the owner, approved, or operator
   * @param _from current owner of the token
   * @param _to address to receive the ownership of the given token ID
   * @param _tokenId uint256 ID of the token to be transferred
  */
  function transferFrom(address _from, address _to, uint256 _tokenId) public canTransfer(_tokenId) {
    require(_from != address(0));
    require(_to != address(0));

    clearApproval(_from, _tokenId);
    removeTokenFrom(_from, _tokenId);
    addTokenTo(_to, _tokenId);

    emit Transfer(_from, _to, _tokenId);
  }

  function transferBatch(address _from, address _to, uint[] _tokenIds) public {
    require(_from != address(0));
    require(_to != address(0));

    for(uint i=0; i<_tokenIds.length; i++) {
      require(isApprovedOrOwner(msg.sender, _tokenIds[i]));
      clearApproval(_from,  _tokenIds[i]);
      removeTokenFrom(_from, _tokenIds[i]);
      addTokenTo(_to, _tokenIds[i]);

      emit Transfer(_from, _to, _tokenIds[i]);
    }
  }

  /**
   * @dev Safely transfers the ownership of a given token ID to another address
   * @dev If the target address is a contract, it must implement `onERC721Received`,
   *  which is called upon a safe transfer, and return the magic value
   *  `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`; otherwise,
   *  the transfer is reverted.
   * @dev Requires the msg sender to be the owner, approved, or operator
   * @param _from current owner of the token
   * @param _to address to receive the ownership of the given token ID
   * @param _tokenId uint256 ID of the token to be transferred
  */
  function safeTransferFrom(
    address _from,
    address _to,
    uint256 _tokenId
  )
    public
    canTransfer(_tokenId)
  {
    // solium-disable-next-line arg-overflow
    safeTransferFrom(_from, _to, _tokenId, "");
  }

  /**
   * @dev Safely transfers the ownership of a given token ID to another address
   * @dev If the target address is a contract, it must implement `onERC721Received`,
   *  which is called upon a safe transfer, and return the magic value
   *  `bytes4(keccak256("onERC721Received(address,uint256,bytes)"))`; otherwise,
   *  the transfer is reverted.
   * @dev Requires the msg sender to be the owner, approved, or operator
   * @param _from current owner of the token
   * @param _to address to receive the ownership of the given token ID
   * @param _tokenId uint256 ID of the token to be transferred
   * @param _data bytes data to send along with a safe transfer check
   */
  function safeTransferFrom(
    address _from,
    address _to,
    uint256 _tokenId,
    bytes _data
  )
    public
    canTransfer(_tokenId)
  {
    transferFrom(_from, _to, _tokenId);
    // solium-disable-next-line arg-overflow
    require(checkAndCallSafeTransfer(_from, _to, _tokenId, _data));
  }

  /**
   * @dev Returns whether the given spender can transfer a given token ID
   * @param _spender address of the spender to query
   * @param _tokenId uint256 ID of the token to be transferred
   * @return bool whether the msg.sender is approved for the given token ID,
   *  is an operator of the owner, or is the owner of the token
   */
  function isApprovedOrOwner(address _spender, uint256 _tokenId) internal view returns (bool) {
    address owner = ownerOf(_tokenId);
    return _spender == owner || getApproved(_tokenId) == _spender || isApprovedForAll(owner, _spender);
  }

  /**
   * @dev Internal function to mint a new token
   * @dev Reverts if the given token ID already exists
   * @param _to The address that will own the minted token
   * @param _tokenId uint256 ID of the token to be minted by the msg.sender
   */
  function _mint(address _to, uint256 _tokenId) internal {
    require(_to != address(0));
    addTokenTo(_to, _tokenId);
    emit Transfer(address(0), _to, _tokenId);
  }

  /**
   * @dev Internal function to burn a specific token
   * @dev Reverts if the token does not exist
   * @param _tokenId uint256 ID of the token being burned by the msg.sender
   */
  function _burn(address _owner, uint256 _tokenId) internal {
    clearApproval(_owner, _tokenId);
    removeTokenFrom(_owner, _tokenId);
    emit Transfer(_owner, address(0), _tokenId);
  }

  /**
   * @dev Internal function to clear current approval of a given token ID
   * @dev Reverts if the given address is not indeed the owner of the token
   * @param _owner owner of the token
   * @param _tokenId uint256 ID of the token to be transferred
   */
  function clearApproval(address _owner, uint256 _tokenId) internal {
    require(ownerOf(_tokenId) == _owner);
    if (tokenApprovals[_tokenId] != address(0)) {
      tokenApprovals[_tokenId] = address(0);
      emit Approval(_owner, address(0), _tokenId);
    }
  }

  /**
   * @dev Internal function to add a token ID to the list of a given address
   * @param _to address representing the new owner of the given token ID
   * @param _tokenId uint256 ID of the token to be added to the tokens list of the given address
   */
  function addTokenTo(address _to, uint256 _tokenId) internal whenNotPaused {
    require(tokenOwner[_tokenId] == address(0));
    tokenOwner[_tokenId] = _to;
    ownedTokensCount[_to] = ownedTokensCount[_to].add(1);
  }

  /**
   * @dev Internal function to remove a token ID from the list of a given address
   * @param _from address representing the previous owner of the given token ID
   * @param _tokenId uint256 ID of the token to be removed from the tokens list of the given address
   */
  function removeTokenFrom(address _from, uint256 _tokenId) internal whenNotPaused{
    require(ownerOf(_tokenId) == _from);
    ownedTokensCount[_from] = ownedTokensCount[_from].sub(1);
    tokenOwner[_tokenId] = address(0);
  }

  /**
   * @dev Internal function to invoke `onERC721Received` on a target address
   * @dev The call is not executed if the target address is not a contract
   * @param _from address representing the previous owner of the given token ID
   * @param _to target address that will receive the tokens
   * @param _tokenId uint256 ID of the token 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 checkAndCallSafeTransfer(
    address _from,
    address _to,
    uint256 _tokenId,
    bytes _data
  )
    internal
    returns (bool)
  {
    if (!_to.isContract()) {
      return true;
    }
    bytes4 retval = ERC721Receiver(_to).onERC721Received(_from, _tokenId, _data);
    return (retval == ERC721_RECEIVED);
  }
}

// File: contracts\ERC721\GirlBasicToken.sol

// add atomic swap feature in the token contract.
contract GirlBasicToken is ERC721BasicToken, Serialize {

  event CreateGirl(address owner, uint256 tokenID, uint256 genes, uint64 birthTime, uint64 cooldownEndTime, uint16 starLevel);
  event CoolDown(uint256 tokenId, uint64 cooldownEndTime);
  event GirlUpgrade(uint256 tokenId, uint64 starLevel);

  struct Girl{
    /**
    少女基因,生成以后不会改变
    **/
    uint genes;

    /*
    出生时间 少女创建时候的时间戳
    */
    uint64 birthTime;

    /*
    冷却结束时间
    */
    uint64 cooldownEndTime;
    /*
    star level
    */
    uint16 starLevel;
  }

  Girl[] girls;


  function totalSupply() public view returns (uint256) {
    return girls.length;
  }

  function getGirlGene(uint _index) public view returns (uint) {
    return girls[_index].genes;
  }

  function getGirlBirthTime(uint _index) public view returns (uint64) {
    return girls[_index].birthTime;
  }

  function getGirlCoolDownEndTime(uint _index) public view returns (uint64) {
    return girls[_index].cooldownEndTime;
  }

  function getGirlStarLevel(uint _index) public view returns (uint16) {
    return girls[_index].starLevel;
  }

  function isNotCoolDown(uint _girlId) public view returns(bool) {
    return uint64(now) > girls[_girlId].cooldownEndTime;
  }

  function _createGirl(
      uint _genes,
      address _owner,
      uint16 _starLevel
  ) internal returns (uint){
      Girl memory _girl = Girl({
          genes:_genes,
          birthTime:uint64(now),
          cooldownEndTime:0,
          starLevel:_starLevel
      });
      uint256 girlId = girls.push(_girl) - 1;
      _mint(_owner, girlId);
      emit CreateGirl(_owner, girlId, _genes, _girl.birthTime, _girl.cooldownEndTime, _girl.starLevel);
      return girlId;
  }

  function _setCoolDownTime(uint _tokenId, uint _coolDownTime) internal {
    girls[_tokenId].cooldownEndTime = uint64(now.add(_coolDownTime));
    emit CoolDown(_tokenId, girls[_tokenId].cooldownEndTime);
  }

  function _LevelUp(uint _tokenId) internal {
    require(girls[_tokenId].starLevel < 65535);
    girls[_tokenId].starLevel = girls[_tokenId].starLevel + 1;
    emit GirlUpgrade(_tokenId, girls[_tokenId].starLevel);
  }

  // ---------------
  // this is atomic swap for girl to be set cross chain.
  // ---------------
  uint8 constant public GIRLBUFFERSIZE = 50;  // buffer size need to serialize girl data; used for cross chain sync

  struct HashLockContract {
    address sender;
    address receiver;
    uint tokenId;
    bytes32 hashlock;
    uint timelock;
    bytes32 secret;
    States state;
    bytes extraData;
  }

  enum States {
    INVALID,
    OPEN,
    CLOSED,
    REFUNDED
  }

  mapping (bytes32 => HashLockContract) private contracts;

  modifier contractExists(bytes32 _contractId) {
    require(_contractExists(_contractId));
    _;
  }

  modifier hashlockMatches(bytes32 _contractId, bytes32 _secret) {
    require(contracts[_contractId].hashlock == keccak256(_secret));
    _;
  }

  modifier closable(bytes32 _contractId) {
    require(contracts[_contractId].state == States.OPEN);
    require(contracts[_contractId].timelock > now);
    _;
  }

  modifier refundable(bytes32 _contractId) {
    require(contracts[_contractId].state == States.OPEN);
    require(contracts[_contractId].timelock <= now);
    _;
  }

  event NewHashLockContract (
    bytes32 indexed contractId,
    address indexed sender,
    address indexed receiver,
    uint tokenId,
    bytes32 hashlock,
    uint timelock,
    bytes extraData
  );

  event SwapClosed(bytes32 indexed contractId);
  event SwapRefunded(bytes32 indexed contractId);

  function open (
    address _receiver,
    bytes32 _hashlock,
    uint _duration,
    uint _tokenId
  ) public
    onlyOwnerOf(_tokenId)
    returns (bytes32 contractId)
  {
    uint _timelock = now.add(_duration);

    // compute girl data;
    bytes memory _extraData = new bytes(GIRLBUFFERSIZE);
    uint offset = GIRLBUFFERSIZE;

    offset = addUint16(offset, _extraData, girls[_tokenId].starLevel);
    offset = addUint64(offset, _extraData, girls[_tokenId].cooldownEndTime);
    offset = addUint64(offset, _extraData, girls[_tokenId].birthTime);
    offset = addUint(offset, _extraData, girls[_tokenId].genes);

    contractId = keccak256 (
      msg.sender,
      _receiver,
      _tokenId,
      _hashlock,
      _timelock,
      _extraData
    );

    // the new contract must not exist
    require(!_contractExists(contractId));

    // temporary change the ownership to this contract address.
    // the ownership will be change to user when close is called.
    clearApproval(msg.sender, _tokenId);
    removeTokenFrom(msg.sender, _tokenId);
    addTokenTo(address(this), _tokenId);


    contracts[contractId] = HashLockContract(
      msg.sender,
      _receiver,
      _tokenId,
      _hashlock,
      _timelock,
      0x0,
      States.OPEN,
      _extraData
    );

    emit NewHashLockContract(contractId, msg.sender, _receiver, _tokenId, _hashlock, _timelock, _extraData);
  }

  function close(bytes32 _contractId, bytes32 _secret)
    public
    contractExists(_contractId)
    hashlockMatches(_contractId, _secret)
    closable(_contractId)
    returns (bool)
  {
    HashLockContract storage c = contracts[_contractId];
    c.secret = _secret;
    c.state = States.CLOSED;

    // transfer token ownership from this contract address to receiver.
    // clearApproval(address(this), c.tokenId);
    removeTokenFrom(address(this), c.tokenId);
    addTokenTo(c.receiver, c.tokenId);

    emit SwapClosed(_contractId);
    return true;
  }

  function refund(bytes32 _contractId)
    public
    contractExists(_contractId)
    refundable(_contractId)
    returns (bool)
  {
    HashLockContract storage c = contracts[_contractId];
    c.state = States.REFUNDED;

    // transfer token ownership from this contract address to receiver.
    // clearApproval(address(this), c.tokenId);
    removeTokenFrom(address(this), c.tokenId);
    addTokenTo(c.sender, c.tokenId);


    emit SwapRefunded(_contractId);
    return true;
  }

  function _contractExists(bytes32 _contractId) internal view returns (bool exists) {
    exists = (contracts[_contractId].sender != address(0));
  }

  function checkContract(bytes32 _contractId)
    public
    view
    contractExists(_contractId)
    returns (
      address sender,
      address receiver,
      uint amount,
      bytes32 hashlock,
      uint timelock,
      bytes32 secret,
      bytes extraData
    )
  {
    HashLockContract memory c = contracts[_contractId];
    return (
      c.sender,
      c.receiver,
      c.tokenId,
      c.hashlock,
      c.timelock,
      c.secret,
      c.extraData
    );
  }


}

// File: contracts\ERC721\GirlOps.sol

contract GirlOps is GirlBasicToken, TrustedContractControl {

  string public name = "Cryptogirl";
  string public symbol = "CG";
  
  function createGirl(uint _genes, address _owner, uint16 _starLevel)
      onlyTrustedContract(msg.sender) public returns (uint) {
      require (_starLevel > 0);
      return _createGirl(_genes, _owner, _starLevel);
  }

  function createPromotionGirl(uint[] _genes, address _owner, uint16 _starLevel) onlyOwner public {
  	require (_starLevel > 0);
    for (uint i=0; i<_genes.length; i++) {
      _createGirl(_genes[i], _owner, _starLevel);
    }
  }

  function burnGirl(address _owner, uint _tokenId) onlyTrustedContract(msg.sender) public {
      _burn(_owner, _tokenId);
  }

  function setCoolDownTime(uint _tokenId, uint _coolDownTime)
      onlyTrustedContract(msg.sender) public {
      _setCoolDownTime(_tokenId, _coolDownTime);
  }

  function levelUp(uint _tokenId)
      onlyTrustedContract(msg.sender) public {
      _LevelUp(_tokenId);
  }

  function safeTransferFromWithData(
    address _from,
    address _to,
    uint256 _tokenId,
    bytes _data
  ) public {
      safeTransferFrom(_from,_to,_tokenId,_data);
  }


}