Bid Engine Loop is Created to React to New Order Receipt and Then Process Order

Within the run function of provider/bidengine/service.go an endless for loop monitors for events placed onto a channel.

When an event of type EventOrderCreated is seen a call to the newOrder function - which exists in provider/bidengine/order.go - is initiated. The newOrder function call creates a new manager for a specific order.

loop:
    for {
        select {
        case <-s.lc.ShutdownRequest():
            s.lc.ShutdownInitiated(nil)
            break loop

        case ev := <-s.sub.Events():
            switch ev := ev.(type) { // nolint: gocritic
            case mtypes.EventOrderCreated:
                // new order
                key := mquery.OrderPath(ev.ID)

                s.session.Log().Info("order detected", "order", key)

                if order := s.orders[key]; order != nil {
                    s.session.Log().Debug("existing order", "order", key)
                    break
                }

                // create an order object for managing the bid process and order lifecycle
                order, err := newOrder(s, ev.ID, s.cfg, s.pass, false)
                if err != nil {
                    s.session.Log().Error("handling order", "order", key, "err", err)
                    break
                }

                ordersCounter.WithLabelValues("start").Inc()
                s.orders[key] = order