23 files changed, 307 insertions, 20 deletions

diff --git a/clientapi/producers/syncapi.go b/clientapi/producers/syncapi.go
index 6e869c31..187e3412 100644
--- a/clientapi/producers/syncapi.go
+++ b/clientapi/producers/syncapi.go
@@ -42,7 +42,7 @@ type SyncAPIProducer struct {
 }
 
 // SendData sends account data to the sync API server
-func (p *SyncAPIProducer) SendData(userID string, roomID string, dataType string, readMarker *eventutil.ReadMarkerJSON) error {
+func (p *SyncAPIProducer) SendData(userID string, roomID string, dataType string, readMarker *eventutil.ReadMarkerJSON, ignoredUsers *types.IgnoredUsers) error {
 	m := &nats.Msg{
 		Subject: p.TopicClientData,
 		Header:  nats.Header{},
@@ -50,9 +50,10 @@ func (p *SyncAPIProducer) SendData(userID string, roomID string, dataType string
 	m.Header.Set(jetstream.UserID, userID)
 
 	data := eventutil.AccountData{
-		RoomID:     roomID,
-		Type:       dataType,
-		ReadMarker: readMarker,
+		RoomID:       roomID,
+		Type:         dataType,
+		ReadMarker:   readMarker,
+		IgnoredUsers: ignoredUsers,
 	}
 	var err error
 	m.Data, err = json.Marshal(data)
diff --git a/clientapi/routing/account_data.go b/clientapi/routing/account_data.go
index 873ffaf5..9399fd0b 100644
--- a/clientapi/routing/account_data.go
+++ b/clientapi/routing/account_data.go
@@ -25,6 +25,7 @@ import (
 	"github.com/matrix-org/dendrite/clientapi/producers"
 	"github.com/matrix-org/dendrite/internal/eventutil"
 	roomserverAPI "github.com/matrix-org/dendrite/roomserver/api"
+	"github.com/matrix-org/dendrite/syncapi/types"
 	"github.com/matrix-org/dendrite/userapi/api"
 
 	"github.com/matrix-org/util"
@@ -126,8 +127,14 @@ func SaveAccountData(
 		return util.ErrorResponse(err)
 	}
 
+	var ignoredUsers *types.IgnoredUsers
+	if dataType == "m.ignored_user_list" {
+		ignoredUsers = &types.IgnoredUsers{}
+		_ = json.Unmarshal(body, ignoredUsers)
+	}
+
 	// TODO: user API should do this since it's account data
-	if err := syncProducer.SendData(userID, roomID, dataType, nil); err != nil {
+	if err := syncProducer.SendData(userID, roomID, dataType, nil, ignoredUsers); err != nil {
 		util.GetLogger(req.Context()).WithError(err).Error("syncProducer.SendData failed")
 		return jsonerror.InternalServerError()
 	}
@@ -184,7 +191,7 @@ func SaveReadMarker(
 		return util.ErrorResponse(err)
 	}
 
-	if err := syncProducer.SendData(device.UserID, roomID, "m.fully_read", &r); err != nil {
+	if err := syncProducer.SendData(device.UserID, roomID, "m.fully_read", &r, nil); err != nil {
 		util.GetLogger(req.Context()).WithError(err).Error("syncProducer.SendData failed")
 		return jsonerror.InternalServerError()
 	}
diff --git a/clientapi/routing/room_tagging.go b/clientapi/routing/room_tagging.go
index 83294b18..ce173613 100644
--- a/clientapi/routing/room_tagging.go
+++ b/clientapi/routing/room_tagging.go
@@ -98,7 +98,7 @@ func PutTag(
 		return jsonerror.InternalServerError()
 	}
 
-	if err = syncProducer.SendData(userID, roomID, "m.tag", nil); err != nil {
+	if err = syncProducer.SendData(userID, roomID, "m.tag", nil, nil); err != nil {
 		logrus.WithError(err).Error("Failed to send m.tag account data update to syncapi")
 	}
 
@@ -151,7 +151,7 @@ func DeleteTag(
 	}
 
 	// TODO: user API should do this since it's account data
-	if err := syncProducer.SendData(userID, roomID, "m.tag", nil); err != nil {
+	if err := syncProducer.SendData(userID, roomID, "m.tag", nil, nil); err != nil {
 		logrus.WithError(err).Error("Failed to send m.tag account data update to syncapi")
 	}
 
diff --git a/internal/eventutil/types.go b/internal/eventutil/types.go
index 17861d6c..afc62d8c 100644
--- a/internal/eventutil/types.go
+++ b/internal/eventutil/types.go
@@ -17,6 +17,8 @@ package eventutil
 import (
 	"errors"
 	"strconv"
+
+	"github.com/matrix-org/dendrite/syncapi/types"
 )
 
 // ErrProfileNoExists is returned when trying to lookup a user's profile that
@@ -26,9 +28,10 @@ var ErrProfileNoExists = errors.New("no known profile for given user ID")
 // AccountData represents account data sent from the client API server to the
 // sync API server
 type AccountData struct {
-	RoomID     string          `json:"room_id"`
-	Type       string          `json:"type"`
-	ReadMarker *ReadMarkerJSON `json:"read_marker,omitempty"` // optional
+	RoomID       string              `json:"room_id"`
+	Type         string              `json:"type"`
+	ReadMarker   *ReadMarkerJSON     `json:"read_marker,omitempty"`   // optional
+	IgnoredUsers *types.IgnoredUsers `json:"ignored_users,omitempty"` // optional
 }
 
 type ReadMarkerJSON struct {
diff --git a/syncapi/consumers/clientapi.go b/syncapi/consumers/clientapi.go
index c28da460..eec369c1 100644
--- a/syncapi/consumers/clientapi.go
+++ b/syncapi/consumers/clientapi.go
@@ -119,6 +119,15 @@ func (s *OutputClientDataConsumer) onMessage(ctx context.Context, msg *nats.Msg)
 		return false
 	}
 
+	if output.IgnoredUsers != nil {
+		if err := s.db.UpdateIgnoresForUser(ctx, userID, output.IgnoredUsers); err != nil {
+			log.WithError(err).WithFields(logrus.Fields{
+				"user_id": userID,
+			}).Errorf("Failed to update ignored users")
+			sentry.CaptureException(err)
+		}
+	}
+
 	s.stream.Advance(streamPos)
 	s.notifier.OnNewAccountData(userID, types.StreamingToken{AccountDataPosition: streamPos})
 
diff --git a/syncapi/storage/interface.go b/syncapi/storage/interface.go
index 0b3ab235..841f6726 100644
--- a/syncapi/storage/interface.go
+++ b/syncapi/storage/interface.go
@@ -150,6 +150,9 @@ type Database interface {
 	SelectContextAfterEvent(ctx context.Context, id int, roomID string, filter *gomatrixserverlib.RoomEventFilter) (int, []*gomatrixserverlib.HeaderedEvent, error)
 
 	StreamToTopologicalPosition(ctx context.Context, roomID string, streamPos types.StreamPosition, backwardOrdering bool) (types.TopologyToken, error)
+
+	IgnoresForUser(ctx context.Context, userID string) (*types.IgnoredUsers, error)
+	UpdateIgnoresForUser(ctx context.Context, userID string, ignores *types.IgnoredUsers) error
 }
 
 type Presence interface {
diff --git a/syncapi/storage/postgres/ignores_table.go b/syncapi/storage/postgres/ignores_table.go
new file mode 100644
index 00000000..055a1a23
--- /dev/null
+++ b/syncapi/storage/postgres/ignores_table.go
@@ -0,0 +1,87 @@
+// Copyright 2022 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package postgres
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+
+	"github.com/matrix-org/dendrite/syncapi/storage/tables"
+	"github.com/matrix-org/dendrite/syncapi/types"
+)
+
+const ignoresSchema = `
+-- Stores data about ignoress
+CREATE TABLE IF NOT EXISTS syncapi_ignores (
+	-- The user ID whose ignore list this belongs to.
+	user_id TEXT NOT NULL,
+	ignores_json TEXT NOT NULL,
+	PRIMARY KEY(user_id)
+);
+`
+
+const selectIgnoresSQL = "" +
+	"SELECT ignores_json FROM syncapi_ignores WHERE user_id = $1"
+
+const upsertIgnoresSQL = "" +
+	"INSERT INTO syncapi_ignores (user_id, ignores_json) VALUES ($1, $2)" +
+	" ON CONFLICT (user_id) DO UPDATE set ignores_json = $2"
+
+type ignoresStatements struct {
+	selectIgnoresStmt *sql.Stmt
+	upsertIgnoresStmt *sql.Stmt
+}
+
+func NewPostgresIgnoresTable(db *sql.DB) (tables.Ignores, error) {
+	_, err := db.Exec(ignoresSchema)
+	if err != nil {
+		return nil, err
+	}
+	s := &ignoresStatements{}
+	if s.selectIgnoresStmt, err = db.Prepare(selectIgnoresSQL); err != nil {
+		return nil, err
+	}
+	if s.upsertIgnoresStmt, err = db.Prepare(upsertIgnoresSQL); err != nil {
+		return nil, err
+	}
+	return s, nil
+}
+
+func (s *ignoresStatements) SelectIgnores(
+	ctx context.Context, userID string,
+) (*types.IgnoredUsers, error) {
+	var ignoresData []byte
+	err := s.selectIgnoresStmt.QueryRowContext(ctx, userID).Scan(&ignoresData)
+	if err != nil {
+		return nil, err
+	}
+	var ignores types.IgnoredUsers
+	if err = json.Unmarshal(ignoresData, &ignores); err != nil {
+		return nil, err
+	}
+	return &ignores, nil
+}
+
+func (s *ignoresStatements) UpsertIgnores(
+	ctx context.Context, userID string, ignores *types.IgnoredUsers,
+) error {
+	ignoresJSON, err := json.Marshal(ignores)
+	if err != nil {
+		return err
+	}
+	_, err = s.upsertIgnoresStmt.ExecContext(ctx, userID, ignoresJSON)
+	return err
+}
diff --git a/syncapi/storage/postgres/syncserver.go b/syncapi/storage/postgres/syncserver.go
index 54445c7e..b0382512 100644
--- a/syncapi/storage/postgres/syncserver.go
+++ b/syncapi/storage/postgres/syncserver.go
@@ -90,6 +90,10 @@ func NewDatabase(dbProperties *config.DatabaseOptions) (*SyncServerDatasource, e
 	if err != nil {
 		return nil, err
 	}
+	ignores, err := NewPostgresIgnoresTable(d.db)
+	if err != nil {
+		return nil, err
+	}
 	presence, err := NewPostgresPresenceTable(d.db)
 	if err != nil {
 		return nil, err
@@ -115,6 +119,7 @@ func NewDatabase(dbProperties *config.DatabaseOptions) (*SyncServerDatasource, e
 		Receipts:            receipts,
 		Memberships:         memberships,
 		NotificationData:    notificationData,
+		Ignores:             ignores,
 		Presence:            presence,
 	}
 	return &d, nil
diff --git a/syncapi/storage/shared/syncserver.go b/syncapi/storage/shared/syncserver.go
index 7c4786fc..1c45d5d9 100644
--- a/syncapi/storage/shared/syncserver.go
+++ b/syncapi/storage/shared/syncserver.go
@@ -48,6 +48,7 @@ type Database struct {
 	Receipts            tables.Receipts
 	Memberships         tables.Memberships
 	NotificationData    tables.NotificationData
+	Ignores             tables.Ignores
 	Presence            tables.Presence
 }
 
@@ -1004,6 +1005,14 @@ func (s *Database) SelectContextAfterEvent(ctx context.Context, id int, roomID s
 	return s.OutputEvents.SelectContextAfterEvent(ctx, nil, id, roomID, filter)
 }
 
+func (s *Database) IgnoresForUser(ctx context.Context, userID string) (*types.IgnoredUsers, error) {
+	return s.Ignores.SelectIgnores(ctx, userID)
+}
+
+func (s *Database) UpdateIgnoresForUser(ctx context.Context, userID string, ignores *types.IgnoredUsers) error {
+	return s.Ignores.UpsertIgnores(ctx, userID, ignores)
+}
+
 func (s *Database) UpdatePresence(ctx context.Context, userID string, presence types.Presence, statusMsg *string, lastActiveTS gomatrixserverlib.Timestamp, fromSync bool) (types.StreamPosition, error) {
 	return s.Presence.UpsertPresence(ctx, nil, userID, statusMsg, presence, lastActiveTS, fromSync)
 }
diff --git a/syncapi/storage/sqlite3/ignores_table.go b/syncapi/storage/sqlite3/ignores_table.go
new file mode 100644
index 00000000..f4afca55
--- /dev/null
+++ b/syncapi/storage/sqlite3/ignores_table.go
@@ -0,0 +1,87 @@
+// Copyright 2022 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package sqlite3
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+
+	"github.com/matrix-org/dendrite/syncapi/storage/tables"
+	"github.com/matrix-org/dendrite/syncapi/types"
+)
+
+const ignoresSchema = `
+-- Stores data about ignoress
+CREATE TABLE IF NOT EXISTS syncapi_ignores (
+	-- The user ID whose ignore list this belongs to.
+	user_id TEXT NOT NULL,
+	ignores_json TEXT NOT NULL,
+	PRIMARY KEY(user_id)
+);
+`
+
+const selectIgnoresSQL = "" +
+	"SELECT ignores_json FROM syncapi_ignores WHERE user_id = $1"
+
+const upsertIgnoresSQL = "" +
+	"INSERT INTO syncapi_ignores (user_id, ignores_json) VALUES ($1, $2)" +
+	" ON CONFLICT DO UPDATE set ignores_json = $2"
+
+type ignoresStatements struct {
+	selectIgnoresStmt *sql.Stmt
+	upsertIgnoresStmt *sql.Stmt
+}
+
+func NewSqliteIgnoresTable(db *sql.DB) (tables.Ignores, error) {
+	_, err := db.Exec(ignoresSchema)
+	if err != nil {
+		return nil, err
+	}
+	s := &ignoresStatements{}
+	if s.selectIgnoresStmt, err = db.Prepare(selectIgnoresSQL); err != nil {
+		return nil, err
+	}
+	if s.upsertIgnoresStmt, err = db.Prepare(upsertIgnoresSQL); err != nil {
+		return nil, err
+	}
+	return s, nil
+}
+
+func (s *ignoresStatements) SelectIgnores(
+	ctx context.Context, userID string,
+) (*types.IgnoredUsers, error) {
+	var ignoresData []byte
+	err := s.selectIgnoresStmt.QueryRowContext(ctx, userID).Scan(&ignoresData)
+	if err != nil {
+		return nil, err
+	}
+	var ignores types.IgnoredUsers
+	if err = json.Unmarshal(ignoresData, &ignores); err != nil {
+		return nil, err
+	}
+	return &ignores, nil
+}
+
+func (s *ignoresStatements) UpsertIgnores(
+	ctx context.Context, userID string, ignores *types.IgnoredUsers,
+) error {
+	ignoresJSON, err := json.Marshal(ignores)
+	if err != nil {
+		return err
+	}
+	_, err = s.upsertIgnoresStmt.ExecContext(ctx, userID, ignoresJSON)
+	return err
+}
diff --git a/syncapi/storage/sqlite3/syncserver.go b/syncapi/storage/sqlite3/syncserver.go
index cb2c3169..9d9d3598 100644
--- a/syncapi/storage/sqlite3/syncserver.go
+++ b/syncapi/storage/sqlite3/syncserver.go
@@ -100,6 +100,10 @@ func (d *SyncServerDatasource) prepare(dbProperties *config.DatabaseOptions) (er
 	if err != nil {
 		return err
 	}
+	ignores, err := NewSqliteIgnoresTable(d.db)
+	if err != nil {
+		return err
+	}
 	presence, err := NewSqlitePresenceTable(d.db, &d.streamID)
 	if err != nil {
 		return err
@@ -125,6 +129,7 @@ func (d *SyncServerDatasource) prepare(dbProperties *config.DatabaseOptions) (er
 		Receipts:            receipts,
 		Memberships:         memberships,
 		NotificationData:    notificationData,
+		Ignores:             ignores,
 		Presence:            presence,
 	}
 	return nil
diff --git a/syncapi/storage/tables/interface.go b/syncapi/storage/tables/interface.go
index ef0587bb..8d368eec 100644
--- a/syncapi/storage/tables/interface.go
+++ b/syncapi/storage/tables/interface.go
@@ -183,6 +183,11 @@ type NotificationData interface {
 	SelectMaxID(ctx context.Context) (int64, error)
 }
 
+type Ignores interface {
+	SelectIgnores(ctx context.Context, userID string) (*types.IgnoredUsers, error)
+	UpsertIgnores(ctx context.Context, userID string, ignores *types.IgnoredUsers) error
+}
+
 type Presence interface {
 	UpsertPresence(ctx context.Context, txn *sql.Tx, userID string, statusMsg *string, presence types.Presence, lastActiveTS gomatrixserverlib.Timestamp, fromSync bool) (pos types.StreamPosition, err error)
 	GetPresenceForUser(ctx context.Context, txn *sql.Tx, userID string) (presence *types.PresenceInternal, err error)
diff --git a/syncapi/streams/stream_invite.go b/syncapi/streams/stream_invite.go
index 70374c6a..ddac9be2 100644
--- a/syncapi/streams/stream_invite.go
+++ b/syncapi/streams/stream_invite.go
@@ -54,6 +54,10 @@ func (p *InviteStreamProvider) IncrementalSync(
 	}
 
 	for roomID, inviteEvent := range invites {
+		// skip ignored user events
+		if _, ok := req.IgnoredUsers.List[inviteEvent.Sender()]; ok {
+			continue
+		}
 		ir := types.NewInviteResponse(inviteEvent)
 		req.Response.Rooms.Invite[roomID] = *ir
 	}
diff --git a/syncapi/streams/stream_pdu.go b/syncapi/streams/stream_pdu.go
index d23209af..ab200e00 100644
--- a/syncapi/streams/stream_pdu.go
+++ b/syncapi/streams/stream_pdu.go
@@ -2,6 +2,7 @@ package streams
 
 import (
 	"context"
+	"database/sql"
 	"sync"
 	"time"
 
@@ -25,6 +26,7 @@ type PDUStreamProvider struct {
 
 	tasks   chan func()
 	workers atomic.Int32
+	userAPI userapi.UserInternalAPI
 }
 
 func (p *PDUStreamProvider) worker() {
@@ -87,6 +89,10 @@ func (p *PDUStreamProvider) CompleteSync(
 	stateFilter := req.Filter.Room.State
 	eventFilter := req.Filter.Room.Timeline
 
+	if err = p.addIgnoredUsersToFilter(ctx, req, &eventFilter); err != nil {
+		req.Log.WithError(err).Error("unable to update event filter with ignored users")
+	}
+
 	// Build up a /sync response. Add joined rooms.
 	var reqMutex sync.Mutex
 	var reqWaitGroup sync.WaitGroup
@@ -175,6 +181,10 @@ func (p *PDUStreamProvider) IncrementalSync(
 		return to
 	}
 
+	if err = p.addIgnoredUsersToFilter(ctx, req, &eventFilter); err != nil {
+		req.Log.WithError(err).Error("unable to update event filter with ignored users")
+	}
+
 	newPos = from
 	for _, delta := range stateDeltas {
 		var pos types.StreamPosition
@@ -402,6 +412,23 @@ func (p *PDUStreamProvider) getJoinResponseForCompleteSync(
 	return jr, nil
 }
 
+// addIgnoredUsersToFilter adds ignored users to the eventfilter and
+// the syncreq itself for further use in streams.
+func (p *PDUStreamProvider) addIgnoredUsersToFilter(ctx context.Context, req *types.SyncRequest, eventFilter *gomatrixserverlib.RoomEventFilter) error {
+	ignores, err := p.DB.IgnoresForUser(ctx, req.Device.UserID)
+	if err != nil {
+		if err == sql.ErrNoRows {
+			return nil
+		}
+		return err
+	}
+	req.IgnoredUsers = *ignores
+	for userID := range ignores.List {
+		eventFilter.NotSenders = append(eventFilter.NotSenders, userID)
+	}
+	return nil
+}
+
 func removeDuplicates(stateEvents, recentEvents []*gomatrixserverlib.HeaderedEvent) []*gomatrixserverlib.HeaderedEvent {
 	for _, recentEv := range recentEvents {
 		if recentEv.StateKey() == nil {
diff --git a/syncapi/streams/stream_receipt.go b/syncapi/streams/stream_receipt.go
index 680f8cd8..9d7d479a 100644
--- a/syncapi/streams/stream_receipt.go
+++ b/syncapi/streams/stream_receipt.go
@@ -54,6 +54,10 @@ func (p *ReceiptStreamProvider) IncrementalSync(
 	// Group receipts by room, so we can create one ClientEvent for every room
 	receiptsByRoom := make(map[string][]types.OutputReceiptEvent)
 	for _, receipt := range receipts {
+		// skip ignored user events
+		if _, ok := req.IgnoredUsers.List[receipt.UserID]; ok {
+			continue
+		}
 		receiptsByRoom[receipt.RoomID] = append(receiptsByRoom[receipt.RoomID], receipt)
 	}
 
diff --git a/syncapi/streams/stream_sendtodevice.go b/syncapi/streams/stream_sendtodevice.go
index a3aaf3d7..6a18df50 100644
--- a/syncapi/streams/stream_sendtodevice.go
+++ b/syncapi/streams/stream_sendtodevice.go
@@ -48,6 +48,10 @@ func (p *SendToDeviceStreamProvider) IncrementalSync(
 
 		// Add the updates into the sync response.
 		for _, event := range events {
+			// skip ignored user events
+			if _, ok := req.IgnoredUsers.List[event.Sender]; ok {
+				continue
+			}
 			req.Response.ToDevice.Events = append(req.Response.ToDevice.Events, event.SendToDeviceEvent)
 		}
 	}
diff --git a/syncapi/streams/stream_typing.go b/syncapi/streams/stream_typing.go
index e46cd447..f781065b 100644
--- a/syncapi/streams/stream_typing.go
+++ b/syncapi/streams/stream_typing.go
@@ -40,11 +40,18 @@ func (p *TypingStreamProvider) IncrementalSync(
 		if users, updated := p.EDUCache.GetTypingUsersIfUpdatedAfter(
 			roomID, int64(from),
 		); updated {
+			typingUsers := make([]string, 0, len(users))
+			for i := range users {
+				// skip ignored user events
+				if _, ok := req.IgnoredUsers.List[users[i]]; !ok {
+					typingUsers = append(typingUsers, users[i])
+				}
+			}
 			ev := gomatrixserverlib.ClientEvent{
 				Type: gomatrixserverlib.MTyping,
 			}
 			ev.Content, err = json.Marshal(map[string]interface{}{
-				"user_ids": users,
+				"user_ids": typingUsers,
 			})
 			if err != nil {
 				req.Log.WithError(err).Error("json.Marshal failed")
diff --git a/syncapi/streams/streams.go b/syncapi/streams/streams.go
index 07322388..c7d06a29 100644
--- a/syncapi/streams/streams.go
+++ b/syncapi/streams/streams.go
@@ -32,6 +32,7 @@ func NewSyncStreamProviders(
 	streams := &Streams{
 		PDUStreamProvider: &PDUStreamProvider{
 			StreamProvider: StreamProvider{DB: d},
+			userAPI:        userAPI,
 		},
 		TypingStreamProvider: &TypingStreamProvider{
 			StreamProvider: StreamProvider{DB: d},
diff --git a/syncapi/types/provider.go b/syncapi/types/provider.go
index f6185fcb..e6777f64 100644
--- a/syncapi/types/provider.go
+++ b/syncapi/types/provider.go
@@ -21,6 +21,8 @@ type SyncRequest struct {
 
 	// Updated by the PDU stream.
 	Rooms map[string]string
+	// Updated by the PDU stream.
+	IgnoredUsers IgnoredUsers
 }
 
 type StreamProvider interface {
diff --git a/syncapi/types/types.go b/syncapi/types/types.go
index d21203b5..ba6b4f8c 100644
--- a/syncapi/types/types.go
+++ b/syncapi/types/types.go
@@ -518,3 +518,7 @@ type OutputSendToDeviceEvent struct {
 	DeviceID string `json:"device_id"`
 	gomatrixserverlib.SendToDeviceEvent
 }
+
+type IgnoredUsers struct {
+	List map[string]interface{} `json:"ignored_users"`
+}
diff --git a/sytest-blacklist b/sytest-blacklist
index a4bdf372..f1bd60db 100644
--- a/sytest-blacklist
+++ b/sytest-blacklist
@@ -2,10 +2,6 @@
 
 Latest account data appears in v2 /sync
 
-# Blacklisted because we don't support ignores yet
-
-Ignore invite in incremental sync
-
 # Relies on a rejected PL event which will never be accepted into the DAG
 
 # Caused by <https://github.com/matrix-org/sytest/pull/911>
diff --git a/sytest-whitelist b/sytest-whitelist
index 69fa19c6..dc67c993 100644
--- a/sytest-whitelist
+++ b/sytest-whitelist
@@ -284,8 +284,6 @@ local user can join room with version 4
 remote user can join room with version 3
 remote user can join room with version 4
 Remote user can backfill in a room with version 4
-# We don't support ignores yet, so ignore this for now - ha ha.
-# Ignore invite in incremental sync
 Outbound federation can send invites via v2 API
 User can invite local user to room with version 3
 User can invite local user to room with version 4
@@ -695,4 +693,7 @@ Presence changes to UNAVAILABLE are reported to remote room members
 New federated private chats get full presence information (SYN-115)
 /upgrade copies >100 power levels to the new room
 Room state after a rejected message event is the same as before
-Room state after a rejected state event is the same as before
\ No newline at end of file
+Room state after a rejected state event is the same as before
+Ignore user in existing room
+Ignore invite in full sync
+Ignore invite in incremental sync
\ No newline at end of file
diff --git a/userapi/consumers/syncapi_streamevent.go b/userapi/consumers/syncapi_streamevent.go
index 34a67d2e..9ef7b508 100644
--- a/userapi/consumers/syncapi_streamevent.go
+++ b/userapi/consumers/syncapi_streamevent.go
@@ -404,8 +404,24 @@ func (s *OutputStreamEventConsumer) evaluatePushRules(ctx context.Context, event
 		return nil, nil
 	}
 
+	// Get accountdata to check if the event.Sender() is ignored by mem.LocalPart
+	data, err := s.db.GetAccountDataByType(ctx, mem.Localpart, "", "m.ignored_user_list")
+	if err != nil {
+		return nil, err
+	}
+	if data != nil {
+		ignored := types.IgnoredUsers{}
+		err = json.Unmarshal(data, &ignored)
+		if err != nil {
+			return nil, err
+		}
+		sender := event.Sender()
+		if _, ok := ignored.List[sender]; ok {
+			return nil, fmt.Errorf("user %s is ignored", sender)
+		}
+	}
 	var res api.QueryPushRulesResponse
-	if err := s.userAPI.QueryPushRules(ctx, &api.QueryPushRulesRequest{UserID: mem.UserID}, &res); err != nil {
+	if err = s.userAPI.QueryPushRules(ctx, &api.QueryPushRulesRequest{UserID: mem.UserID}, &res); err != nil {
 		return nil, err
 	}