onOrderUpdate(orderUpdate) {
    if (orderUpdate.type.toLowerCase().includes('exchange')) {
      return;
    }

    const order = Bitfinex.createExchangeOrder(orderUpdate);

    this.logger.info(`Bitfinex: order update: ${JSON.stringify(order)}`);
    this.orders[order.id] = order;
  }
Order events from websocket: New, Update, Delete