contract Tokenlocker {

  // ERC20 basic token contract being held
  IERC20 private _token;

  // beneficiary of tokens after they are released
  address private _beneficiary;

  // timestamp when token release is enabled
  uint256 private _releaseTime;

  constructor (IERC20 token, address beneficiary, uint256 releaseTime) public {
    // solhint-disable-next-line not-rely-on-time
    _token = token;
    _beneficiary = beneficiary;
    _releaseTime = releaseTime; //
    require(_releaseTime > block.timestamp, "ERRROR");
  }

  /**
   * @return the token being held.
   */
  function token() public view returns (IERC20) {
    return _token;
  }

  /**
   * @return the beneficiary of the tokens.
   */
  function beneficiary() public view returns (address) {
    return _beneficiary;
  }

  /**
   * @return the time when the tokens are released.
   */
  function releaseTime() public view returns (uint256) {
    return _releaseTime;
  }
  
  function canRelease() public view returns (bool) {
    if(_releaseTime < block.timestamp){return true;}
    else {return false;}
  }

  /**
   * @notice Transfers tokens held by timelock to beneficiary.
   */
  function release() public virtual {
    // solhint-disable-next-line not-rely-on-time
    require(block.timestamp >= _releaseTime, "TokenTimelock: current time is before release time");

    uint256 amount = _token.balanceOf(address(this));
    require(amount > 0, "TokenTimelock: no tokens to release");

    _token.transfer(_beneficiary, amount);
  }
}
/**
 * @dev A token holder contract that will allow a beneficiary to extract the
 * tokens after a given release time.
 *
 * Useful for simple vesting schedules like "advisors get all of their tokens
 * after 1 year".
 */
function release() public virtual {
  // solhint-disable-next-line not-rely-on-time
  require(block.timestamp >= _releaseTime, "TokenTimelock: current time is before release time");

  uint256 amount = _token.balanceOf(address(this));
  require(amount > 0, "TokenTimelock: no tokens to release");

  _token.transfer(_beneficiary, amount);
}

/**
 * @notice Transfers tokens held by timelock to beneficiary.
 */