code: func (s *Session) unblockPin(pukpin []byte) error {
  	if _, err := s.Channel.transmitEncrypted(claSCWallet, insUnblockPin, 0, 0, pukpin); err != nil {
  		return err
  	}
  	s.verified = true
  	return nil
  }
docs: // unblockPin unblocks a wallet with the provided puk and resets the pin to the
  // new one specified.