Drop reference_sha column (#3083)

Companion PR to https://github.com/matrix-org/gomatrixserverlib/pull/383

roomserver/internal/input/input_events.go

@@ -883,9 +883,7 @@ func (r *Inputer) kickGuests(ctx context.Context, event gomatrixserverlib.PDU, r
 			Origin:       senderDomain,
 			SendAsServer: string(senderDomain),
 		})
-		prevEvents = []gomatrixserverlib.EventReference{
-			event.EventReference(),
-		}
+		prevEvents = []string{event.EventID()}
 	}
 
 	inputReq := &api.InputRoomEventsRequest{

roomserver/internal/input/input_latest_events.go

@@ -154,8 +154,8 @@ func (u *latestEventsUpdater) doUpdateLatestEvents() error {
 	extremitiesChanged, err := u.calculateLatest(
 		u.oldLatest, u.event,
 		types.StateAtEventAndReference{
-			EventReference: u.event.EventReference(),
-			StateAtEvent:   u.stateAtEvent,
+			EventID:      u.event.EventID(),
+			StateAtEvent: u.stateAtEvent,
 		},
 	)
 	if err != nil {
@@ -349,7 +349,7 @@ func (u *latestEventsUpdater) calculateLatest(
 	// If the "new" event is already referenced by an existing event
 	// then do nothing - it's not a candidate to be a new extremity if
 	// it has been referenced.
-	if referenced, err := u.updater.IsReferenced(newEvent.EventReference()); err != nil {
+	if referenced, err := u.updater.IsReferenced(newEvent.EventID()); err != nil {
 		return false, fmt.Errorf("u.updater.IsReferenced(new): %w", err)
 	} else if referenced {
 		u.latest = oldLatest
@@ -360,7 +360,7 @@ func (u *latestEventsUpdater) calculateLatest(
 	// have entries in the previous events table. If they do then we
 	// will no longer include them as forward extremities.
 	for k, l := range existingRefs {
-		referenced, err := u.updater.IsReferenced(l.EventReference)
+		referenced, err := u.updater.IsReferenced(l.EventID)
 		if err != nil {
 			return false, fmt.Errorf("u.updater.IsReferenced: %w", err)
 		} else if referenced {

roomserver/internal/input/input_missing.go

@@ -520,9 +520,9 @@ func (t *missingStateReq) getMissingEvents(ctx context.Context, e gomatrixserver
 		return nil, false, false, fmt.Errorf("t.DB.LatestEventIDs: %w", err)
 	}
 	latestEvents := make([]string, len(latest))
-	for i, ev := range latest {
-		latestEvents[i] = ev.EventID
-		t.hadEvent(ev.EventID)
+	for i := range latest {
+		latestEvents[i] = latest[i]
+		t.hadEvent(latest[i])
 	}
 
 	var missingResp *fclient.RespMissingEvents

roomserver/internal/perform/perform_admin.go

@@ -131,9 +131,7 @@ func (r *Admin) PerformAdminEvacuateRoom(
 			SendAsServer: string(senderDomain),
 		})
 		affected = append(affected, stateKey)
-		prevEvents = []gomatrixserverlib.EventReference{
-			event.EventReference(),
-		}
+		prevEvents = []string{event.EventID()}
 	}
 
 	inputReq := &api.InputRoomEventsRequest{
@@ -253,9 +251,9 @@ func (r *Admin) PerformAdminDownloadState(
 
 	for _, fwdExtremity := range fwdExtremities {
 		var state gomatrixserverlib.StateResponse
-		state, err = r.Inputer.FSAPI.LookupState(ctx, r.Inputer.ServerName, serverName, roomID, fwdExtremity.EventID, roomInfo.RoomVersion)
+		state, err = r.Inputer.FSAPI.LookupState(ctx, r.Inputer.ServerName, serverName, roomID, fwdExtremity, roomInfo.RoomVersion)
 		if err != nil {
-			return fmt.Errorf("r.Inputer.FSAPI.LookupState (%q): %s", fwdExtremity.EventID, err)
+			return fmt.Errorf("r.Inputer.FSAPI.LookupState (%q): %s", fwdExtremity, err)
 		}
 		for _, authEvent := range state.GetAuthEvents().UntrustedEvents(roomInfo.RoomVersion) {
 			if err = gomatrixserverlib.VerifyEventSignatures(ctx, authEvent, r.Inputer.KeyRing); err != nil {

roomserver/internal/perform/perform_inbound_peek.go

@@ -64,7 +64,7 @@ func (r *InboundPeeker) PerformInboundPeek(
 	if err != nil {
 		return err
 	}
-	latestEvents, err := r.DB.EventsFromIDs(ctx, info, []string{latestEventRefs[0].EventID})
+	latestEvents, err := r.DB.EventsFromIDs(ctx, info, []string{latestEventRefs[0]})
 	if err != nil {
 		return err
 	}

roomserver/internal/perform/perform_upgrade.go

@@ -471,7 +471,7 @@ func (r *Upgrader) sendInitialEvents(ctx context.Context, evTime time.Time, user
 			return fmt.Errorf("failed to set content of new %q event: %w", proto.Type, err)
 		}
 		if i > 0 {
-			proto.PrevEvents = []gomatrixserverlib.EventReference{builtEvents[i-1].EventReference()}
+			proto.PrevEvents = []string{builtEvents[i-1].EventID()}
 		}
 
 		var verImpl gomatrixserverlib.IRoomVersion

roomserver/internal/query/query_test.go

@@ -43,13 +43,10 @@ func createEventDB() *getEventDB {
 
 // Adds a fake event to the storage with given auth events.
 func (db *getEventDB) addFakeEvent(eventID string, authIDs []string) error {
-	authEvents := []gomatrixserverlib.EventReference{}
+	authEvents := make([]any, 0, len(authIDs))
 	for _, authID := range authIDs {
-		authEvents = append(authEvents, gomatrixserverlib.EventReference{
-			EventID: authID,
-		})
+		authEvents = append(authEvents, []any{authID, struct{}{}})
 	}
-
 	builder := map[string]interface{}{
 		"event_id":    eventID,
 		"auth_events": authEvents,