mirror of
https://github.com/matrix-org/dendrite.git
synced 2024-11-23 14:51:56 -06:00
661 lines
23 KiB
Go
661 lines
23 KiB
Go
// Copyright 2017 Vector Creations Ltd
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// Copyright 2018 New Vector Ltd
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// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package input
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import (
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"bytes"
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"context"
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"fmt"
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"time"
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fedapi "github.com/matrix-org/dendrite/federationapi/api"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/internal/eventutil"
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"github.com/matrix-org/dendrite/roomserver/api"
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"github.com/matrix-org/dendrite/roomserver/internal/helpers"
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"github.com/matrix-org/dendrite/roomserver/state"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/gomatrixserverlib"
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"github.com/matrix-org/util"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/sirupsen/logrus"
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)
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func init() {
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prometheus.MustRegister(processRoomEventDuration)
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}
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var processRoomEventDuration = prometheus.NewHistogramVec(
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prometheus.HistogramOpts{
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Namespace: "dendrite",
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Subsystem: "roomserver",
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Name: "processroomevent_duration_millis",
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Help: "How long it takes the roomserver to process an event",
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Buckets: []float64{ // milliseconds
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5, 10, 25, 50, 75, 100, 250, 500,
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1000, 2000, 3000, 4000, 5000, 6000,
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7000, 8000, 9000, 10000, 15000, 20000,
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},
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},
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[]string{"room_id"},
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)
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// processRoomEvent can only be called once at a time
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//
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// TODO(#375): This should be rewritten to allow concurrent calls. The
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// difficulty is in ensuring that we correctly annotate events with the correct
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// state deltas when sending to kafka streams
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// TODO: Break up function - we should probably do transaction ID checks before calling this.
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// nolint:gocyclo
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func (r *Inputer) processRoomEvent(
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ctx context.Context,
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input *api.InputRoomEvent,
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) (eventID string, err error) {
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// Measure how long it takes to process this event.
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started := time.Now()
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defer func() {
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timetaken := time.Since(started)
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processRoomEventDuration.With(prometheus.Labels{
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"room_id": input.Event.RoomID(),
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}).Observe(float64(timetaken.Milliseconds()))
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}()
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// Parse and validate the event JSON
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headered := input.Event
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event := headered.Unwrap()
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logger := util.GetLogger(ctx).WithFields(logrus.Fields{
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"event_id": event.EventID(),
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"room_id": event.RoomID(),
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"type": event.Type(),
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})
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// if we have already got this event then do not process it again, if the input kind is an outlier.
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// Outliers contain no extra information which may warrant a re-processing.
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if input.Kind == api.KindOutlier {
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evs, err2 := r.DB.EventsFromIDs(ctx, []string{event.EventID()})
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if err2 == nil && len(evs) == 1 {
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// check hash matches if we're on early room versions where the event ID was a random string
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idFormat, err2 := headered.RoomVersion.EventIDFormat()
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if err2 == nil {
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switch idFormat {
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case gomatrixserverlib.EventIDFormatV1:
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if bytes.Equal(event.EventReference().EventSHA256, evs[0].EventReference().EventSHA256) {
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logger.Debugf("Already processed event; ignoring")
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return event.EventID(), nil
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}
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default:
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logger.Debugf("Already processed event; ignoring")
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return event.EventID(), nil
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}
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}
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}
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}
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missingReq := &api.QueryMissingAuthPrevEventsRequest{
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RoomID: event.RoomID(),
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AuthEventIDs: event.AuthEventIDs(),
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PrevEventIDs: event.PrevEventIDs(),
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}
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missingRes := &api.QueryMissingAuthPrevEventsResponse{}
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if event.Type() != gomatrixserverlib.MRoomCreate {
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if err = r.Queryer.QueryMissingAuthPrevEvents(ctx, missingReq, missingRes); err != nil {
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return "", fmt.Errorf("r.Queryer.QueryMissingAuthPrevEvents: %w", err)
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}
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}
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// First of all, check that the auth events of the event are known.
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// If they aren't then we will ask the federation API for them.
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isRejected := false
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authEvents := gomatrixserverlib.NewAuthEvents(nil)
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knownEvents := map[string]*types.Event{}
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if err = r.checkForMissingAuthEvents(ctx, logger, input.Event, &authEvents, knownEvents); err != nil {
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return "", fmt.Errorf("r.checkForMissingAuthEvents: %w", err)
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}
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// Check if the event is allowed by its auth events. If it isn't then
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// we consider the event to be "rejected" — it will still be persisted.
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var rejectionErr error
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if rejectionErr = gomatrixserverlib.Allowed(event, &authEvents); rejectionErr != nil {
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isRejected = true
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logger.WithError(rejectionErr).Warnf("Event %s rejected", event.EventID())
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}
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// Accumulate the auth event NIDs.
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authEventIDs := event.AuthEventIDs()
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authEventNIDs := make([]types.EventNID, 0, len(authEventIDs))
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for _, authEventID := range authEventIDs {
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authEventNIDs = append(authEventNIDs, knownEvents[authEventID].EventNID)
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}
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var softfail bool
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if input.Kind == api.KindNew {
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// Check that the event passes authentication checks based on the
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// current room state.
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softfail, err = helpers.CheckForSoftFail(ctx, r.DB, headered, input.StateEventIDs)
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if err != nil {
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logger.WithError(err).Info("Error authing soft-failed event")
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}
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}
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// Store the event.
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_, _, stateAtEvent, redactionEvent, redactedEventID, err := r.DB.StoreEvent(ctx, event, authEventNIDs, isRejected)
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if err != nil {
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return "", fmt.Errorf("r.DB.StoreEvent: %w", err)
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}
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// if storing this event results in it being redacted then do so.
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if !isRejected && redactedEventID == event.EventID() {
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r, rerr := eventutil.RedactEvent(redactionEvent, event)
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if rerr != nil {
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return "", fmt.Errorf("eventutil.RedactEvent: %w", rerr)
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}
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event = r
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}
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// For outliers we can stop after we've stored the event itself as it
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// doesn't have any associated state to store and we don't need to
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// notify anyone about it.
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if input.Kind == api.KindOutlier {
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logger.Debug("Stored outlier")
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return event.EventID(), nil
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}
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roomInfo, err := r.DB.RoomInfo(ctx, event.RoomID())
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if err != nil {
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return "", fmt.Errorf("r.DB.RoomInfo: %w", err)
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}
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if roomInfo == nil {
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return "", fmt.Errorf("r.DB.RoomInfo missing for room %s", event.RoomID())
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}
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if input.Origin == "" {
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input.Origin = event.Origin()
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}
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if len(missingRes.MissingPrevEventIDs) > 0 {
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missingState := missingStateReq{
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origin: input.Origin,
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inputer: r,
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queryer: r.Queryer,
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db: r.DB,
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federation: r.FSAPI,
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roomsMu: internal.NewMutexByRoom(),
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servers: []gomatrixserverlib.ServerName{input.Origin},
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hadEvents: map[string]bool{},
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haveEvents: map[string]*gomatrixserverlib.HeaderedEvent{},
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}
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if err = missingState.processEventWithMissingState(ctx, input.Event.Unwrap(), roomInfo.RoomVersion); err != nil {
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return "", fmt.Errorf("r.checkForMissingPrevEvents: %w", err)
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}
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}
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if stateAtEvent.BeforeStateSnapshotNID == 0 {
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// We haven't calculated a state for this event yet.
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// Lets calculate one.
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err = r.calculateAndSetState(ctx, input, *roomInfo, &stateAtEvent, event, isRejected)
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if err != nil && input.Kind != api.KindOld {
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return "", fmt.Errorf("r.calculateAndSetState: %w", err)
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}
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}
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// We stop here if the event is rejected: We've stored it but won't update forward extremities or notify anyone about it.
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if isRejected || softfail {
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logger.WithField("soft_fail", softfail).Debug("Stored rejected event")
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return event.EventID(), rejectionErr
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}
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switch input.Kind {
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case api.KindNew:
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if err = r.updateLatestEvents(
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ctx, // context
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roomInfo, // room info for the room being updated
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stateAtEvent, // state at event (below)
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event, // event
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input.SendAsServer, // send as server
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input.TransactionID, // transaction ID
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input.HasState, // rewrites state?
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); err != nil {
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return "", fmt.Errorf("r.updateLatestEvents: %w", err)
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}
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case api.KindOld:
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err = r.WriteOutputEvents(event.RoomID(), []api.OutputEvent{
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{
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Type: api.OutputTypeOldRoomEvent,
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OldRoomEvent: &api.OutputOldRoomEvent{
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Event: headered,
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},
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},
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})
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if err != nil {
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return "", fmt.Errorf("r.WriteOutputEvents (old): %w", err)
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}
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}
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// processing this event resulted in an event (which may not be the one we're processing)
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// being redacted. We are guaranteed to have both sides (the redaction/redacted event),
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// so notify downstream components to redact this event - they should have it if they've
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// been tracking our output log.
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if redactedEventID != "" {
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err = r.WriteOutputEvents(event.RoomID(), []api.OutputEvent{
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{
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Type: api.OutputTypeRedactedEvent,
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RedactedEvent: &api.OutputRedactedEvent{
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RedactedEventID: redactedEventID,
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RedactedBecause: redactionEvent.Headered(headered.RoomVersion),
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},
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},
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})
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if err != nil {
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return "", fmt.Errorf("r.WriteOutputEvents (redactions): %w", err)
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}
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}
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// Update the extremities of the event graph for the room
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return event.EventID(), nil
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}
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func (r *Inputer) checkForMissingAuthEvents(
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ctx context.Context,
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logger *logrus.Entry,
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event *gomatrixserverlib.HeaderedEvent,
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auth *gomatrixserverlib.AuthEvents,
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known map[string]*types.Event,
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) error {
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authEventIDs := event.AuthEventIDs()
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if len(authEventIDs) == 0 {
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return nil
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}
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unknown := map[string]struct{}{}
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authEvents, err := r.DB.EventsFromIDs(ctx, authEventIDs)
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if err != nil {
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return fmt.Errorf("r.DB.EventsFromIDs: %w", err)
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}
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for _, event := range authEvents {
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if event.Event != nil {
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ev := event // don't take the address of the iterated value
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known[event.EventID()] = &ev
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if err = auth.AddEvent(event.Event); err != nil {
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return fmt.Errorf("auth.AddEvent: %w", err)
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}
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} else {
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unknown[event.EventID()] = struct{}{}
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}
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}
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if len(unknown) > 0 {
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logger.Printf("XXX: There are %d missing auth events", len(unknown))
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serverReq := &fedapi.QueryJoinedHostServerNamesInRoomRequest{
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RoomID: event.RoomID(),
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}
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serverRes := &fedapi.QueryJoinedHostServerNamesInRoomResponse{}
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if err = r.FSAPI.QueryJoinedHostServerNamesInRoom(ctx, serverReq, serverRes); err != nil {
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return fmt.Errorf("r.FSAPI.QueryJoinedHostServerNamesInRoom: %w", err)
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}
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logger.Printf("XXX: Asking servers %+v", serverRes.ServerNames)
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var res gomatrixserverlib.RespEventAuth
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var found bool
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for _, serverName := range serverRes.ServerNames {
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res, err = r.FSAPI.GetEventAuth(ctx, serverName, event.RoomID(), event.EventID())
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if err != nil {
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logger.WithError(err).Warnf("Failed to get event auth from federation for %q: %s", event.EventID(), err)
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continue
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}
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logger.Printf("XXX: Server %q provided us with %d auth events", serverName, len(res.AuthEvents))
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found = true
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break
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}
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if !found {
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logger.Printf("XXX: None of the %d servers provided us with auth events", len(serverRes.ServerNames))
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return fmt.Errorf("no servers provided event auth")
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}
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for _, event := range gomatrixserverlib.ReverseTopologicalOrdering(
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res.AuthEvents,
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gomatrixserverlib.TopologicalOrderByAuthEvents,
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) {
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// If we already know about this event then we don't need to store
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// it or do anything further with it.
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if _, ok := known[event.EventID()]; ok {
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continue
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}
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// Check the signatures of the event.
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// TODO: It really makes sense for the federation API to be doing this,
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// because then it can attempt another server if one serves up an event
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// with an invalid signature. For now this will do.
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if err := event.VerifyEventSignatures(ctx, r.FSAPI.KeyRing()); err != nil {
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return fmt.Errorf("event.VerifyEventSignatures: %w", err)
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}
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// Otherwise, we need to store, and that means we need to know the
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// auth event NIDs. Let's see if we can find those.
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authEventNIDs := make([]types.EventNID, 0, len(event.AuthEventIDs()))
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for _, eventID := range event.AuthEventIDs() {
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knownEvent, ok := known[eventID]
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if !ok {
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return fmt.Errorf("missing auth event %s for %s", eventID, event.EventID())
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}
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authEventNIDs = append(authEventNIDs, knownEvent.EventNID)
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}
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// Let's take a note of the fact that we now know about this event.
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known[event.EventID()] = nil
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if err := auth.AddEvent(event); err != nil {
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return fmt.Errorf("auth.AddEvent: %w", err)
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}
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// Check if the auth event should be rejected.
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isRejected := false
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if err := gomatrixserverlib.Allowed(event, auth); err != nil {
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isRejected = true
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logger.WithError(err).Warnf("Auth event %s rejected", event.EventID())
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}
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// Finally, store the event in the database.
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eventNID, _, _, _, _, err := r.DB.StoreEvent(ctx, event, authEventNIDs, isRejected)
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if err != nil {
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return fmt.Errorf("r.DB.StoreEvent: %w", err)
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}
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// Now we know about this event, too.
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known[event.EventID()] = &types.Event{
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EventNID: eventNID,
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Event: event,
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}
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}
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}
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return nil
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}
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/*
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func (r *Inputer) checkForMissingPrevEvents(
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ctx context.Context,
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logger *logrus.Entry,
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event *gomatrixserverlib.HeaderedEvent,
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roomInfo *types.RoomInfo,
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known map[string]*types.Event,
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) error {
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prevStates := map[string]*types.StateAtEvent{}
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prevEventIDs := event.PrevEventIDs()
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if len(prevEventIDs) == 0 && event.Type() != gomatrixserverlib.MRoomCreate {
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return fmt.Errorf("expected to find some prev events for event type %q", event.Type())
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}
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for _, eventID := range prevEventIDs {
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state, err := r.DB.StateAtEventIDs(ctx, []string{eventID})
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if err != nil {
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if _, ok := err.(types.MissingEventError); ok {
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continue
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}
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return fmt.Errorf("r.DB.StateAtEventIDs: %w", err)
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}
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if len(state) == 1 {
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prevStates[eventID] = &state[0]
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continue
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}
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}
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// If we know all of the states of the previous events then there is nothing more to
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// do here, as the state across them will be resolved later.
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if len(prevStates) == len(prevEventIDs) {
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return nil
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}
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if r.FSAPI == nil {
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return fmt.Errorf("cannot satisfy missing events without federation")
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}
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// Ask the federation API which servers we should ask. In theory the roomserver
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// doesn't need the help of the federation API to do this because we already know
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// all of the membership states, it's just that the federation API tracks this in
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// a table for this purpose. TODO: Work out what makes most sense here.
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serverReq := &fedapi.QueryJoinedHostServerNamesInRoomRequest{
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RoomID: event.RoomID(),
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}
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serverRes := &fedapi.QueryJoinedHostServerNamesInRoomResponse{}
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if err := r.FSAPI.QueryJoinedHostServerNamesInRoom(ctx, serverReq, serverRes); err != nil {
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return fmt.Errorf("r.FSAPI.QueryJoinedHostServerNamesInRoom: %w", err)
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}
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// Attempt to fill in the gap using /get_missing_events
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// This will either:
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// - fill in the gap completely then process event `e` returning no backwards extremity
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// - fail to fill in the gap and tell us to terminate the transaction err=not nil
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// - fail to fill in the gap and tell us to fetch state at the new backwards extremity, and to not terminate the transaction
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newEvents, err := r.getMissingEvents(ctx, logger, event, roomInfo, serverRes.ServerNames, known)
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if err != nil {
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return err
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}
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if len(newEvents) == 0 {
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return fmt.Errorf("/get_missing_events returned no new events")
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}
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return nil
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}
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func (r *Inputer) getMissingEvents(
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ctx context.Context,
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logger *logrus.Entry,
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event *gomatrixserverlib.HeaderedEvent,
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roomInfo *types.RoomInfo,
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servers []gomatrixserverlib.ServerName,
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known map[string]*types.Event,
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) (newEvents []*gomatrixserverlib.Event, err error) {
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logger.Printf("XXX: get_missing_events called")
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needed := gomatrixserverlib.StateNeededForAuth([]*gomatrixserverlib.Event{event.Unwrap()})
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// Ask the roomserver for our current forward extremities. These will form
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// the "earliest" part of the `/get_missing_events` request.
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req := &api.QueryLatestEventsAndStateRequest{
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RoomID: event.RoomID(),
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StateToFetch: needed.Tuples(),
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}
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res := &api.QueryLatestEventsAndStateResponse{}
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if err = r.Queryer.QueryLatestEventsAndState(ctx, req, res); err != nil {
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logger.WithError(err).Warn("Failed to query latest events")
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return nil, err
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}
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// Accumulate the event IDs of our forward extremities for use in the request.
|
|
latestEvents := make([]string, len(res.LatestEvents))
|
|
for i := range res.LatestEvents {
|
|
latestEvents[i] = res.LatestEvents[i].EventID
|
|
}
|
|
|
|
var missingResp *gomatrixserverlib.RespMissingEvents
|
|
for _, server := range servers {
|
|
logger.Printf("XXX: Calling /get_missing_events via %q", server)
|
|
var m gomatrixserverlib.RespMissingEvents
|
|
if m, err = r.FSAPI.LookupMissingEvents(ctx, server, event.RoomID(), gomatrixserverlib.MissingEvents{
|
|
Limit: 20,
|
|
EarliestEvents: latestEvents,
|
|
LatestEvents: []string{event.EventID()},
|
|
}, event.RoomVersion); err == nil {
|
|
missingResp = &m
|
|
break
|
|
} else if errors.Is(err, context.DeadlineExceeded) {
|
|
break
|
|
}
|
|
}
|
|
|
|
if missingResp == nil {
|
|
return nil, fmt.Errorf("/get_missing_events failed via all candidate servers")
|
|
}
|
|
if len(missingResp.Events) == 0 {
|
|
return nil, fmt.Errorf("/get_missing_events returned no events")
|
|
}
|
|
|
|
// security: how we handle failures depends on whether or not this event will become the new forward extremity for the room.
|
|
// There's 2 scenarios to consider:
|
|
// - Case A: We got pushed an event and are now fetching missing prev_events. (isInboundTxn=true)
|
|
// - Case B: We are fetching missing prev_events already and now fetching some more (isInboundTxn=false)
|
|
// In Case B, we know for sure that the event we are currently processing will not become the new forward extremity for the room,
|
|
// as it was called in response to an inbound txn which had it as a prev_event.
|
|
// In Case A, the event is a forward extremity, and could eventually become the _only_ forward extremity in the room. This is bad
|
|
// because it means we would trust the state at that event to be the state for the entire room, and allows rooms to be hijacked.
|
|
// https://github.com/matrix-org/synapse/pull/3456
|
|
// https://github.com/matrix-org/synapse/blob/229eb81498b0fe1da81e9b5b333a0285acde9446/synapse/handlers/federation.py#L335
|
|
// For now, we do not allow Case B, so reject the event.
|
|
logger.Printf("XXX: get_missing_events returned %d events", len(missingResp.Events))
|
|
|
|
newEvents = gomatrixserverlib.ReverseTopologicalOrdering(
|
|
missingResp.Events,
|
|
gomatrixserverlib.TopologicalOrderByPrevEvents,
|
|
)
|
|
for _, pe := range event.PrevEventIDs() {
|
|
hasPrevEvent := false
|
|
for _, ev := range newEvents {
|
|
if ev.EventID() == pe {
|
|
hasPrevEvent = true
|
|
break
|
|
}
|
|
}
|
|
if !hasPrevEvent {
|
|
logger.Errorf("Prev event %q is still missing after /get_missing_events", pe)
|
|
}
|
|
}
|
|
|
|
backwardExtremity := newEvents[0]
|
|
fastForwardEvents := newEvents[1:]
|
|
|
|
// Do we know about the state of the backward extremity already?
|
|
if _, err := r.DB.StateAtEventIDs(ctx, []string{backwardExtremity.EventID()}); err == nil {
|
|
// Yes, we do, so we don't need to store that event.
|
|
} else {
|
|
// No, we don't, so let's go find it.
|
|
// r.FSAPI.LookupStateIDs()
|
|
}
|
|
|
|
for _, ev := range fastForwardEvents {
|
|
if _, err := r.processRoomEvent(ctx, &api.InputRoomEvent{
|
|
Kind: api.KindOld,
|
|
Event: ev.Headered(event.RoomVersion),
|
|
AuthEventIDs: ev.AuthEventIDs(),
|
|
}); err != nil {
|
|
return nil, fmt.Errorf("r.processRoomEvent (prev event): %w", err)
|
|
}
|
|
}
|
|
|
|
return newEvents, nil
|
|
}
|
|
|
|
func (r *Inputer) lookupStateBeforeEvent(
|
|
ctx context.Context,
|
|
logger *logrus.Entry,
|
|
event *gomatrixserverlib.HeaderedEvent,
|
|
roomInfo *types.RoomInfo,
|
|
servers []gomatrixserverlib.ServerName,
|
|
) error {
|
|
knownPrevStates := map[string]types.StateAtEvent{}
|
|
unknownPrevStates := map[string]struct{}{}
|
|
neededStateEvents := map[string]struct{}{}
|
|
|
|
for _, prevEventID := range event.PrevEventIDs() {
|
|
if state, err := r.DB.StateAtEventIDs(ctx, []string{prevEventID}); err == nil && len(state) == 1 {
|
|
knownPrevStates[prevEventID] = state[0]
|
|
} else {
|
|
unknownPrevStates[prevEventID] = struct{}{}
|
|
}
|
|
}
|
|
|
|
for prevEventID := range unknownPrevStates {
|
|
stateIDs, err := r.FSAPI.LookupStateIDs(ctx, "TODO: SERVER", event.RoomID(), prevEventID)
|
|
if err != nil {
|
|
return fmt.Errorf("r.FSAPI.LookupStateIDs: %w", err)
|
|
}
|
|
events, err := r.DB.EventsFromIDs(ctx, stateIDs.StateEventIDs)
|
|
if err != nil {
|
|
return fmt.Errorf("r.DB.EventsFromIDs: %w", err)
|
|
}
|
|
for i, eventID := range stateIDs.StateEventIDs {
|
|
if events[i].Event == nil || events[i].EventNID == 0 {
|
|
neededStateEvents[eventID] = struct{}{}
|
|
}
|
|
}
|
|
|
|
if len(neededStateEvents) > (len(stateIDs.StateEventIDs) / 2) {
|
|
// More than 50% of the state events are missing, so let's just
|
|
// call `/state` instead of fetching the events individually.
|
|
state, err := r.FSAPI.LookupState(ctx, "", event.RoomID(), prevEventID, roomInfo.RoomVersion)
|
|
if err != nil {
|
|
return fmt.Errorf("r.FSAPI.LookupState: %w", err)
|
|
}
|
|
knownPrevStates[prevEventID] = types.StateAtEvent{
|
|
StateEntry: types.StateEntry{},
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
*/
|
|
|
|
func (r *Inputer) calculateAndSetState(
|
|
ctx context.Context,
|
|
input *api.InputRoomEvent,
|
|
roomInfo types.RoomInfo,
|
|
stateAtEvent *types.StateAtEvent,
|
|
event *gomatrixserverlib.Event,
|
|
isRejected bool,
|
|
) error {
|
|
var err error
|
|
roomState := state.NewStateResolution(r.DB, roomInfo)
|
|
|
|
if input.HasState && !isRejected {
|
|
// Check here if we think we're in the room already.
|
|
stateAtEvent.Overwrite = true
|
|
var joinEventNIDs []types.EventNID
|
|
// Request join memberships only for local users only.
|
|
if joinEventNIDs, err = r.DB.GetMembershipEventNIDsForRoom(ctx, roomInfo.RoomNID, true, true); err == nil {
|
|
// If we have no local users that are joined to the room then any state about
|
|
// the room that we have is quite possibly out of date. Therefore in that case
|
|
// we should overwrite it rather than merge it.
|
|
stateAtEvent.Overwrite = len(joinEventNIDs) == 0
|
|
}
|
|
|
|
// We've been told what the state at the event is so we don't need to calculate it.
|
|
// Check that those state events are in the database and store the state.
|
|
var entries []types.StateEntry
|
|
if entries, err = r.DB.StateEntriesForEventIDs(ctx, input.StateEventIDs); err != nil {
|
|
return fmt.Errorf("r.DB.StateEntriesForEventIDs: %w", err)
|
|
}
|
|
entries = types.DeduplicateStateEntries(entries)
|
|
|
|
if stateAtEvent.BeforeStateSnapshotNID, err = r.DB.AddState(ctx, roomInfo.RoomNID, nil, entries); err != nil {
|
|
return fmt.Errorf("r.DB.AddState: %w", err)
|
|
}
|
|
} else {
|
|
stateAtEvent.Overwrite = false
|
|
|
|
// We haven't been told what the state at the event is so we need to calculate it from the prev_events
|
|
if stateAtEvent.BeforeStateSnapshotNID, err = roomState.CalculateAndStoreStateBeforeEvent(ctx, event, isRejected); err != nil {
|
|
return fmt.Errorf("roomState.CalculateAndStoreStateBeforeEvent: %w", err)
|
|
}
|
|
}
|
|
|
|
err = r.DB.SetState(ctx, stateAtEvent.EventNID, stateAtEvent.BeforeStateSnapshotNID)
|
|
if err != nil {
|
|
return fmt.Errorf("r.DB.SetState: %w", err)
|
|
}
|
|
return nil
|
|
}
|