Hooray, it doesn't work

roomserver/internal/helpers/auth.go

@@ -83,7 +83,7 @@ func CheckForSoftFail(
 	// Check if the event is allowed.
 	if err = gomatrixserverlib.Allowed(event.Event, &authEvents); err != nil {
 		// return true, nil
-		return true, err
+		return true, fmt.Errorf("gomatrixserverlib.Allowed: %w", err)
 	}
 	return false, nil
 }

roomserver/internal/helpers/eventcache.go

@@ -0,0 +1,63 @@
+package helpers
+
+import (
+	"context"
+	"fmt"
+	"sync"
+
+	"github.com/matrix-org/dendrite/roomserver/storage"
+	"github.com/matrix-org/dendrite/roomserver/types"
+)
+
+type CachedDB struct {
+	mutex       sync.RWMutex
+	eventsByID  map[string]*types.Event
+	eventsByNID map[types.EventNID]*types.Event
+	storage.Database
+}
+
+func NewCachedDB(db storage.Database) *CachedDB {
+	return &CachedDB{
+		Database:    db,
+		eventsByID:  make(map[string]*types.Event),
+		eventsByNID: make(map[types.EventNID]*types.Event),
+	}
+}
+
+func (c *CachedDB) Events(ctx context.Context, eventNIDs []types.EventNID) ([]types.Event, error) {
+	fmt.Println("Want", eventNIDs)
+	events := make([]types.Event, len(eventNIDs))
+	retrieve := make([]types.EventNID, 0, len(eventNIDs))
+	c.mutex.RLock()
+	for i, eventNID := range eventNIDs {
+		if cached, ok := c.eventsByNID[eventNID]; ok {
+			events[i] = *cached
+			fmt.Println(i, "Existing", cached, cached.EventID(), cached.EventNID, cached.Type(), *cached.StateKey())
+		} else {
+			retrieve = append(retrieve, eventNID)
+		}
+	}
+	c.mutex.RUnlock()
+	var retrieved []types.Event
+	var err error
+	if len(retrieve) > 0 {
+		retrieved, err = c.Database.Events(ctx, retrieve)
+		if err != nil {
+			return nil, err
+		}
+	}
+	c.mutex.Lock()
+	defer c.mutex.Unlock()
+	for i, event := range retrieved {
+		c.eventsByID[event.EventID()] = &retrieved[i]
+		c.eventsByNID[event.EventNID] = &retrieved[i]
+	}
+	for i, eventNID := range eventNIDs {
+		if cached, ok := c.eventsByNID[eventNID]; ok {
+			fmt.Println(i, "Found", cached, cached.EventID(), cached.EventNID, cached.Type(), *cached.StateKey(), string(cached.Content()))
+			events[i] = *cached
+		}
+	}
+	fmt.Println("Returning", events)
+	return events, nil
+}