Merge branch 'master' into bad-json-body

appservice/api/query.go

@@ -20,6 +20,7 @@ package api
 import (
 	"context"
 	"database/sql"
+	"errors"
 	"net/http"
 
 	"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
@@ -97,15 +98,15 @@ type httpAppServiceQueryAPI struct {
 
 // NewAppServiceQueryAPIHTTP creates a AppServiceQueryAPI implemented by talking
 // to a HTTP POST API.
-// If httpClient is nil then it uses http.DefaultClient
+// If httpClient is nil an error is returned
 func NewAppServiceQueryAPIHTTP(
 	appserviceURL string,
 	httpClient *http.Client,
-) AppServiceQueryAPI {
+) (AppServiceQueryAPI, error) {
 	if httpClient == nil {
-		httpClient = http.DefaultClient
+		return nil, errors.New("NewRoomserverAliasAPIHTTP: httpClient is <nil>")
 	}
-	return &httpAppServiceQueryAPI{appserviceURL, httpClient}
+	return &httpAppServiceQueryAPI{appserviceURL, httpClient}, nil
 }
 
 // RoomAliasExists implements AppServiceQueryAPI

clientapi/producers/roomserver.go

@@ -104,18 +104,14 @@ func (c *RoomserverProducer) SendInputRoomEvents(
 // This should only be needed for invite events that occur outside of a known room.
 // If we are in the room then the event should be sent using the SendEvents method.
 func (c *RoomserverProducer) SendInvite(
-	ctx context.Context, inviteEvent gomatrixserverlib.Event,
+	ctx context.Context, inviteEvent gomatrixserverlib.HeaderedEvent,
+	inviteRoomState []gomatrixserverlib.InviteV2StrippedState,
 ) error {
-	verReq := api.QueryRoomVersionForRoomRequest{RoomID: inviteEvent.RoomID()}
-	verRes := api.QueryRoomVersionForRoomResponse{}
-	err := c.QueryAPI.QueryRoomVersionForRoom(ctx, &verReq, &verRes)
-	if err != nil {
-		return err
-	}
-
 	request := api.InputRoomEventsRequest{
 		InputInviteEvents: []api.InputInviteEvent{{
-			Event: inviteEvent.Headered(verRes.RoomVersion),
+			Event:           inviteEvent,
+			InviteRoomState: inviteRoomState,
+			RoomVersion:     inviteEvent.RoomVersion,
 		}},
 	}
 	var response api.InputRoomEventsResponse

clientapi/routing/capabilities.go

@@ -29,7 +29,7 @@ func GetCapabilities(
 	req *http.Request, queryAPI roomserverAPI.RoomserverQueryAPI,
 ) util.JSONResponse {
 	roomVersionsQueryReq := roomserverAPI.QueryRoomVersionCapabilitiesRequest{}
-	var roomVersionsQueryRes roomserverAPI.QueryRoomVersionCapabilitiesResponse
+	roomVersionsQueryRes := roomserverAPI.QueryRoomVersionCapabilitiesResponse{}
 	if err := queryAPI.QueryRoomVersionCapabilities(
 		req.Context(),
 		&roomVersionsQueryReq,

clientapi/routing/joinroom.go

@@ -242,6 +242,9 @@ func (r joinRoomReq) joinRoomUsingServers(
 	queryRes := roomserverAPI.QueryLatestEventsAndStateResponse{}
 	event, err := common.BuildEvent(r.req.Context(), &eb, r.cfg, r.evTime, r.queryAPI, &queryRes)
 	if err == nil {
+		// If we have successfully built an event at this point then we can
+		// assert that the room is a local room, as BuildEvent was able to
+		// add prev_events etc successfully.
 		if _, err = r.producer.SendEvents(
 			r.req.Context(),
 			[]gomatrixserverlib.HeaderedEvent{
@@ -260,6 +263,13 @@ func (r joinRoomReq) joinRoomUsingServers(
 			}{roomID},
 		}
 	}
+
+	// Otherwise, if we've reached here, then we haven't been able to populate
+	// prev_events etc for the room, therefore the room is probably federated.
+
+	// TODO: This needs to be re-thought, as in the case of an invite, the room
+	// will exist in the database in roomserver_rooms but won't have any state
+	// events, therefore this below check fails.
 	if err != common.ErrRoomNoExists {
 		util.GetLogger(r.req.Context()).WithError(err).Error("common.BuildEvent failed")
 		return jsonerror.InternalServerError()
@@ -320,14 +330,14 @@ func (r joinRoomReq) joinRoomUsingServer(roomID string, server gomatrixserverlib
 	respMakeJoin, err := r.federation.MakeJoin(r.req.Context(), server, roomID, r.userID, supportedVersions)
 	if err != nil {
 		// TODO: Check if the user was not allowed to join the room.
-		return nil, err
+		return nil, fmt.Errorf("r.federation.MakeJoin: %w", err)
 	}
 
 	// Set all the fields to be what they should be, this should be a no-op
 	// but it's possible that the remote server returned us something "odd"
 	err = r.writeToBuilder(&respMakeJoin.JoinEvent, roomID)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("r.writeToBuilder: %w", err)
 	}
 
 	if respMakeJoin.RoomVersion == "" {
@@ -347,18 +357,16 @@ func (r joinRoomReq) joinRoomUsingServer(roomID string, server gomatrixserverlib
 		r.cfg.Matrix.PrivateKey, respMakeJoin.RoomVersion,
 	)
 	if err != nil {
-		util.GetLogger(r.req.Context()).WithError(err).Error("respMakeJoin.JoinEvent.Build failed")
+		return nil, fmt.Errorf("respMakeJoin.JoinEvent.Build: %w", err)
-		res := jsonerror.InternalServerError()
-		return &res, nil
 	}
 
 	respSendJoin, err := r.federation.SendJoin(r.req.Context(), server, event, respMakeJoin.RoomVersion)
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("r.federation.SendJoin: %w", err)
 	}
 
 	if err = respSendJoin.Check(r.req.Context(), r.keyRing, event); err != nil {
-		return nil, err
+		return nil, fmt.Errorf("respSendJoin: %w", err)
 	}
 
 	if err = r.producer.SendEventWithState(
@@ -366,9 +374,7 @@ func (r joinRoomReq) joinRoomUsingServer(roomID string, server gomatrixserverlib
 		gomatrixserverlib.RespState(respSendJoin.RespState),
 		event.Headered(respMakeJoin.RoomVersion),
 	); err != nil {
-		util.GetLogger(r.req.Context()).WithError(err).Error("gomatrixserverlib.RespState failed")
+		return nil, fmt.Errorf("r.producer.SendEventWithState: %w", err)
-		res := jsonerror.InternalServerError()
-		return &res, nil
 	}
 
 	return &util.JSONResponse{

cmd/roomserver-integration-tests/main.go

@@ -44,6 +44,8 @@ var (
 	// This needs to be high enough to account for the time it takes to create
 	// the postgres database tables which can take a while on travis.
 	timeoutString = defaulting(os.Getenv("TIMEOUT"), "60s")
+	// Timeout for http client
+	timeoutHTTPClient = defaulting(os.Getenv("TIMEOUT_HTTP"), "30s")
 	// The name of maintenance database to connect to in order to create the test database.
 	postgresDatabase = defaulting(os.Getenv("POSTGRES_DATABASE"), "postgres")
 	// The name of the test database to create.
@@ -68,7 +70,10 @@ func defaulting(value, defaultValue string) string {
 	return value
 }
 
-var timeout time.Duration
+var (
+	timeout     time.Duration
+	timeoutHTTP time.Duration
+)
 
 func init() {
 	var err error
@@ -76,6 +81,10 @@ func init() {
 	if err != nil {
 		panic(err)
 	}
+	timeoutHTTP, err = time.ParseDuration(timeoutHTTPClient)
+	if err != nil {
+		panic(err)
+	}
 }
 
 func createDatabase(database string) error {
@@ -199,7 +208,10 @@ func writeToRoomServer(input []string, roomserverURL string) error {
 			return err
 		}
 	}
-	x := api.NewRoomserverInputAPIHTTP(roomserverURL, nil)
+	x, err := api.NewRoomserverInputAPIHTTP(roomserverURL, &http.Client{Timeout: timeoutHTTP})
+	if err != nil {
+		return err
+	}
 	return x.InputRoomEvents(context.Background(), &request, &response)
 }
 
@@ -258,7 +270,7 @@ func testRoomserver(input []string, wantOutput []string, checkQueries func(api.R
 	cmd.Args = []string{"dendrite-room-server", "--config", filepath.Join(dir, test.ConfigFile)}
 
 	gotOutput, err := runAndReadFromTopic(cmd, cfg.RoomServerURL()+"/metrics", doInput, outputTopic, len(wantOutput), func() {
-		queryAPI := api.NewRoomserverQueryAPIHTTP("http://"+string(cfg.Listen.RoomServer), nil)
+		queryAPI, _ := api.NewRoomserverQueryAPIHTTP("http://"+string(cfg.Listen.RoomServer), &http.Client{Timeout: timeoutHTTP})
 		checkQueries(queryAPI)
 	})
 	if err != nil {

common/basecomponent/base.go

@@ -19,6 +19,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"time"
 
 	"golang.org/x/crypto/ed25519"
 
@@ -52,6 +53,7 @@ type BaseDendrite struct {
 
 	// APIMux should be used to register new public matrix api endpoints
 	APIMux        *mux.Router
+	httpClient    *http.Client
 	Cfg           *config.Dendrite
 	KafkaConsumer sarama.Consumer
 	KafkaProducer sarama.SyncProducer
@@ -77,11 +79,14 @@ func NewBaseDendrite(cfg *config.Dendrite, componentName string) *BaseDendrite {
 		kafkaConsumer, kafkaProducer = setupKafka(cfg)
 	}
 
+	const defaultHTTPTimeout = 30 * time.Second
+
 	return &BaseDendrite{
 		componentName: componentName,
 		tracerCloser:  closer,
 		Cfg:           cfg,
 		APIMux:        mux.NewRouter().UseEncodedPath(),
+		httpClient:    &http.Client{Timeout: defaultHTTPTimeout},
 		KafkaConsumer: kafkaConsumer,
 		KafkaProducer: kafkaProducer,
 	}
@@ -95,7 +100,11 @@ func (b *BaseDendrite) Close() error {
 // CreateHTTPAppServiceAPIs returns the QueryAPI for hitting the appservice
 // component over HTTP.
 func (b *BaseDendrite) CreateHTTPAppServiceAPIs() appserviceAPI.AppServiceQueryAPI {
-	return appserviceAPI.NewAppServiceQueryAPIHTTP(b.Cfg.AppServiceURL(), nil)
+	a, err := appserviceAPI.NewAppServiceQueryAPIHTTP(b.Cfg.AppServiceURL(), b.httpClient)
+	if err != nil {
+		logrus.WithError(err).Panic("CreateHTTPAppServiceAPIs failed")
+	}
+	return a
 }
 
 // CreateHTTPRoomserverAPIs returns the AliasAPI, InputAPI and QueryAPI for hitting
@@ -105,22 +114,40 @@ func (b *BaseDendrite) CreateHTTPRoomserverAPIs() (
 	roomserverAPI.RoomserverInputAPI,
 	roomserverAPI.RoomserverQueryAPI,
 ) {
-	alias := roomserverAPI.NewRoomserverAliasAPIHTTP(b.Cfg.RoomServerURL(), nil)
+
-	input := roomserverAPI.NewRoomserverInputAPIHTTP(b.Cfg.RoomServerURL(), nil)
+	alias, err := roomserverAPI.NewRoomserverAliasAPIHTTP(b.Cfg.RoomServerURL(), b.httpClient)
-	query := roomserverAPI.NewRoomserverQueryAPIHTTP(b.Cfg.RoomServerURL(), nil)
+	if err != nil {
+		logrus.WithError(err).Panic("NewRoomserverAliasAPIHTTP failed")
+	}
+	input, err := roomserverAPI.NewRoomserverInputAPIHTTP(b.Cfg.RoomServerURL(), b.httpClient)
+	if err != nil {
+		logrus.WithError(err).Panic("NewRoomserverInputAPIHTTP failed", b.httpClient)
+	}
+	query, err := roomserverAPI.NewRoomserverQueryAPIHTTP(b.Cfg.RoomServerURL(), nil)
+	if err != nil {
+		logrus.WithError(err).Panic("NewRoomserverQueryAPIHTTP failed", b.httpClient)
+	}
 	return alias, input, query
 }
 
 // CreateHTTPEDUServerAPIs returns eduInputAPI for hitting the EDU
 // server over HTTP
 func (b *BaseDendrite) CreateHTTPEDUServerAPIs() eduServerAPI.EDUServerInputAPI {
-	return eduServerAPI.NewEDUServerInputAPIHTTP(b.Cfg.EDUServerURL(), nil)
+	e, err := eduServerAPI.NewEDUServerInputAPIHTTP(b.Cfg.EDUServerURL(), nil)
+	if err != nil {
+		logrus.WithError(err).Panic("NewEDUServerInputAPIHTTP failed", b.httpClient)
+	}
+	return e
 }
 
 // CreateHTTPFederationSenderAPIs returns FederationSenderQueryAPI for hitting
 // the federation sender over HTTP
 func (b *BaseDendrite) CreateHTTPFederationSenderAPIs() federationSenderAPI.FederationSenderQueryAPI {
-	return federationSenderAPI.NewFederationSenderQueryAPIHTTP(b.Cfg.FederationSenderURL(), nil)
+	f, err := federationSenderAPI.NewFederationSenderQueryAPIHTTP(b.Cfg.FederationSenderURL(), nil)
+	if err != nil {
+		logrus.WithError(err).Panic("NewFederationSenderQueryAPIHTTP failed", b.httpClient)
+	}
+	return f
 }
 
 // CreateDeviceDB creates a new instance of the device database. Should only be

common/events.go

@@ -17,6 +17,7 @@ package common
 import (
 	"context"
 	"errors"
+	"fmt"
 	"time"
 
 	"github.com/matrix-org/dendrite/common/config"
@@ -46,6 +47,7 @@ func BuildEvent(
 
 	err := AddPrevEventsToEvent(ctx, builder, queryAPI, queryRes)
 	if err != nil {
+		// This can pass through a ErrRoomNoExists to the caller
 		return nil, err
 	}
 
@@ -68,7 +70,7 @@ func AddPrevEventsToEvent(
 ) error {
 	eventsNeeded, err := gomatrixserverlib.StateNeededForEventBuilder(builder)
 	if err != nil {
-		return err
+		return fmt.Errorf("gomatrixserverlib.StateNeededForEventBuilder: %w", err)
 	}
 
 	// Ask the roomserver for information about this room
@@ -77,7 +79,7 @@ func AddPrevEventsToEvent(
 		StateToFetch: eventsNeeded.Tuples(),
 	}
 	if err = queryAPI.QueryLatestEventsAndState(ctx, &queryReq, queryRes); err != nil {
-		return err
+		return fmt.Errorf("queryAPI.QueryLatestEventsAndState: %w", err)
 	}
 
 	if !queryRes.RoomExists {
@@ -86,7 +88,7 @@ func AddPrevEventsToEvent(
 
 	eventFormat, err := queryRes.RoomVersion.EventFormat()
 	if err != nil {
-		return err
+		return fmt.Errorf("queryRes.RoomVersion.EventFormat: %w", err)
 	}
 
 	builder.Depth = queryRes.Depth
@@ -96,26 +98,26 @@ func AddPrevEventsToEvent(
 	for i := range queryRes.StateEvents {
 		err = authEvents.AddEvent(&queryRes.StateEvents[i].Event)
 		if err != nil {
-			return err
+			return fmt.Errorf("authEvents.AddEvent: %w", err)
 		}
 	}
 
 	refs, err := eventsNeeded.AuthEventReferences(&authEvents)
 	if err != nil {
-		return err
+		return fmt.Errorf("eventsNeeded.AuthEventReferences: %w", err)
 	}
 
+	truncAuth, truncPrev := truncateAuthAndPrevEvents(refs, queryRes.LatestEvents)
 	switch eventFormat {
 	case gomatrixserverlib.EventFormatV1:
-		builder.AuthEvents = refs
+		builder.AuthEvents = truncAuth
-		builder.PrevEvents = queryRes.LatestEvents
+		builder.PrevEvents = truncPrev
 	case gomatrixserverlib.EventFormatV2:
-		v2AuthRefs := []string{}
+		v2AuthRefs, v2PrevRefs := []string{}, []string{}
-		v2PrevRefs := []string{}
+		for _, ref := range truncAuth {
-		for _, ref := range refs {
 			v2AuthRefs = append(v2AuthRefs, ref.EventID)
 		}
-		for _, ref := range queryRes.LatestEvents {
+		for _, ref := range truncPrev {
 			v2PrevRefs = append(v2PrevRefs, ref.EventID)
 		}
 		builder.AuthEvents = v2AuthRefs
@@ -124,3 +126,21 @@ func AddPrevEventsToEvent(
 
 	return nil
 }
+
+// truncateAuthAndPrevEvents limits the number of events we add into
+// an event as prev_events or auth_events.
+// NOTSPEC: The limits here feel a bit arbitrary but they are currently
+// here because of https://github.com/matrix-org/matrix-doc/issues/2307
+// and because Synapse will just drop events that don't comply.
+func truncateAuthAndPrevEvents(auth, prev []gomatrixserverlib.EventReference) (
+	truncAuth, truncPrev []gomatrixserverlib.EventReference,
+) {
+	truncAuth, truncPrev = auth, prev
+	if len(truncAuth) > 10 {
+		truncAuth = truncAuth[:10]
+	}
+	if len(truncPrev) > 20 {
+		truncPrev = truncPrev[:20]
+	}
+	return
+}

eduserver/api/input.go

@@ -15,6 +15,7 @@ package api
 
 import (
 	"context"
+	"errors"
 	"net/http"
 
 	commonHTTP "github.com/matrix-org/dendrite/common/http"
@@ -57,11 +58,11 @@ type EDUServerInputAPI interface {
 const EDUServerInputTypingEventPath = "/api/eduserver/input"
 
 // NewEDUServerInputAPIHTTP creates a EDUServerInputAPI implemented by talking to a HTTP POST API.
-func NewEDUServerInputAPIHTTP(eduServerURL string, httpClient *http.Client) EDUServerInputAPI {
+func NewEDUServerInputAPIHTTP(eduServerURL string, httpClient *http.Client) (EDUServerInputAPI, error) {
 	if httpClient == nil {
-		httpClient = http.DefaultClient
+		return nil, errors.New("NewTypingServerInputAPIHTTP: httpClient is <nil>")
 	}
-	return &httpEDUServerInputAPI{eduServerURL, httpClient}
+	return &httpEDUServerInputAPI{eduServerURL, httpClient}, nil
 }
 
 type httpEDUServerInputAPI struct {

federationapi/routing/invite.go

@@ -15,18 +15,17 @@
 package routing
 
 import (
-	"context"
+	"encoding/json"
 	"net/http"
 
 	"github.com/matrix-org/dendrite/clientapi/jsonerror"
 	"github.com/matrix-org/dendrite/clientapi/producers"
 	"github.com/matrix-org/dendrite/common/config"
-	"github.com/matrix-org/dendrite/roomserver/api"
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
 )
 
-// Invite implements /_matrix/federation/v1/invite/{roomID}/{eventID}
+// Invite implements /_matrix/federation/v2/invite/{roomID}/{eventID}
 func Invite(
 	httpReq *http.Request,
 	request *gomatrixserverlib.FederationRequest,
@@ -36,24 +35,14 @@ func Invite(
 	producer *producers.RoomserverProducer,
 	keys gomatrixserverlib.KeyRing,
 ) util.JSONResponse {
-	// Look up the room version for the room.
+	inviteReq := gomatrixserverlib.InviteV2Request{}
-	verReq := api.QueryRoomVersionForRoomRequest{RoomID: roomID}
+	if err := json.Unmarshal(request.Content(), &inviteReq); err != nil {
-	verRes := api.QueryRoomVersionForRoomResponse{}
-	if err := producer.QueryAPI.QueryRoomVersionForRoom(context.Background(), &verReq, &verRes); err != nil {
 		return util.JSONResponse{
 			Code: http.StatusBadRequest,
-			JSON: jsonerror.UnsupportedRoomVersion(err.Error()),
+			JSON: jsonerror.NotJSON("The request body could not be decoded into an invite request. " + err.Error()),
-		}
-	}
-
-	// Decode the event JSON from the request.
-	event, err := gomatrixserverlib.NewEventFromUntrustedJSON(request.Content(), verRes.RoomVersion)
-	if err != nil {
-		return util.JSONResponse{
-			Code: http.StatusBadRequest,
-			JSON: jsonerror.NotJSON("The request body could not be decoded into valid JSON. " + err.Error()),
 		}
 	}
+	event := inviteReq.Event()
 
 	// Check that the room ID is correct.
 	if event.RoomID() != roomID {
@@ -71,14 +60,6 @@ func Invite(
 		}
 	}
 
-	// Check that the event is from the server sending the request.
-	if event.Origin() != request.Origin() {
-		return util.JSONResponse{
-			Code: http.StatusForbidden,
-			JSON: jsonerror.Forbidden("The invite must be sent by the server it originated on"),
-		}
-	}
-
 	// Check that the event is signed by the server sending the request.
 	redacted := event.Redact()
 	verifyRequests := []gomatrixserverlib.VerifyJSONRequest{{
@@ -104,7 +85,11 @@ func Invite(
 	)
 
 	// Add the invite event to the roomserver.
-	if err = producer.SendInvite(httpReq.Context(), signedEvent); err != nil {
+	if err = producer.SendInvite(
+		httpReq.Context(),
+		signedEvent.Headered(inviteReq.RoomVersion()),
+		inviteReq.InviteRoomState(),
+	); err != nil {
 		util.GetLogger(httpReq.Context()).WithError(err).Error("producer.SendInvite failed")
 		return jsonerror.InternalServerError()
 	}

federationapi/routing/join.go

@@ -15,6 +15,7 @@
 package routing
 
 import (
+	"fmt"
 	"net/http"
 	"time"
 
@@ -34,6 +35,7 @@ func MakeJoin(
 	cfg *config.Dendrite,
 	query api.RoomserverQueryAPI,
 	roomID, userID string,
+	remoteVersions []gomatrixserverlib.RoomVersion,
 ) util.JSONResponse {
 	verReq := api.QueryRoomVersionForRoomRequest{RoomID: roomID}
 	verRes := api.QueryRoomVersionForRoomResponse{}
@@ -44,6 +46,27 @@ func MakeJoin(
 		}
 	}
 
+	// Check that the room that the remote side is trying to join is actually
+	// one of the room versions that they listed in their supported ?ver= in
+	// the make_join URL.
+	// https://matrix.org/docs/spec/server_server/r0.1.3#get-matrix-federation-v1-make-join-roomid-userid
+	remoteSupportsVersion := false
+	for _, v := range remoteVersions {
+		if v == verRes.RoomVersion {
+			remoteSupportsVersion = true
+			break
+		}
+	}
+	// If it isn't, stop trying to join the room.
+	if !remoteSupportsVersion {
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			JSON: jsonerror.UnsupportedRoomVersion(
+				fmt.Sprintf("Joining server does not support room version %s", verRes.RoomVersion),
+			),
+		}
+	}
+
 	_, domain, err := gomatrixserverlib.SplitID('@', userID)
 	if err != nil {
 		return util.JSONResponse{
@@ -140,7 +163,12 @@ func SendJoin(
 	if event.RoomID() != roomID {
 		return util.JSONResponse{
 			Code: http.StatusBadRequest,
-			JSON: jsonerror.BadJSON("The room ID in the request path must match the room ID in the join event JSON"),
+			JSON: jsonerror.BadJSON(
+				fmt.Sprintf(
+					"The room ID in the request path (%q) must match the room ID in the join event JSON (%q)",
+					roomID, event.RoomID(),
+				),
+			),
 		}
 	}
 
@@ -148,7 +176,12 @@ func SendJoin(
 	if event.EventID() != eventID {
 		return util.JSONResponse{
 			Code: http.StatusBadRequest,
-			JSON: jsonerror.BadJSON("The event ID in the request path must match the event ID in the join event JSON"),
+			JSON: jsonerror.BadJSON(
+				fmt.Sprintf(
+					"The event ID in the request path (%q) must match the event ID in the join event JSON (%q)",
+					eventID, event.EventID(),
+				),
+			),
 		}
 	}
 
@@ -186,6 +219,7 @@ func SendJoin(
 		PrevEventIDs: event.PrevEventIDs(),
 		AuthEventIDs: event.AuthEventIDs(),
 		RoomID:       roomID,
+		ResolveState: true,
 	}, &stateAndAuthChainResponse)
 	if err != nil {
 		util.GetLogger(httpReq.Context()).WithError(err).Error("query.QueryStateAndAuthChain failed")

federationapi/routing/routing.go

@@ -85,7 +85,7 @@ func Setup(
 		},
 	)).Methods(http.MethodPut, http.MethodOptions)
 
-	v1fedmux.Handle("/invite/{roomID}/{eventID}", common.MakeFedAPI(
+	v2fedmux.Handle("/invite/{roomID}/{eventID}", common.MakeFedAPI(
 		"federation_invite", cfg.Matrix.ServerName, keys,
 		func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse {
 			vars, err := common.URLDecodeMapValues(mux.Vars(httpReq))
@@ -198,7 +198,7 @@ func Setup(
 		},
 	)).Methods(http.MethodGet)
 
-	v1fedmux.Handle("/make_join/{roomID}/{userID}", common.MakeFedAPI(
+	v1fedmux.Handle("/make_join/{roomID}/{eventID}", common.MakeFedAPI(
 		"federation_make_join", cfg.Matrix.ServerName, keys,
 		func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse {
 			vars, err := common.URLDecodeMapValues(mux.Vars(httpReq))
@@ -206,14 +206,28 @@ func Setup(
 				return util.ErrorResponse(err)
 			}
 			roomID := vars["roomID"]
-			userID := vars["userID"]
+			eventID := vars["eventID"]
+			queryVars := httpReq.URL.Query()
+			remoteVersions := []gomatrixserverlib.RoomVersion{}
+			if vers, ok := queryVars["ver"]; ok {
+				// The remote side supplied a ?=ver so use that to build up the list
+				// of supported room versions
+				for _, v := range vers {
+					remoteVersions = append(remoteVersions, gomatrixserverlib.RoomVersion(v))
+				}
+			} else {
+				// The remote side didn't supply a ?ver= so just assume that they only
+				// support room version 1, as per the spec
+				// https://matrix.org/docs/spec/server_server/r0.1.3#get-matrix-federation-v1-make-join-roomid-userid
+				remoteVersions = append(remoteVersions, gomatrixserverlib.RoomVersionV1)
+			}
 			return MakeJoin(
-				httpReq, request, cfg, query, roomID, userID,
+				httpReq, request, cfg, query, roomID, eventID, remoteVersions,
 			)
 		},
 	)).Methods(http.MethodGet)
 
-	v2fedmux.Handle("/send_join/{roomID}/{userID}", common.MakeFedAPI(
+	v2fedmux.Handle("/send_join/{roomID}/{eventID}", common.MakeFedAPI(
 		"federation_send_join", cfg.Matrix.ServerName, keys,
 		func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse {
 			vars, err := common.URLDecodeMapValues(mux.Vars(httpReq))
@@ -221,14 +235,14 @@ func Setup(
 				return util.ErrorResponse(err)
 			}
 			roomID := vars["roomID"]
-			userID := vars["userID"]
+			eventID := vars["eventID"]
 			return SendJoin(
-				httpReq, request, cfg, query, producer, keys, roomID, userID,
+				httpReq, request, cfg, query, producer, keys, roomID, eventID,
 			)
 		},
 	)).Methods(http.MethodPut)
 
-	v1fedmux.Handle("/make_leave/{roomID}/{userID}", common.MakeFedAPI(
+	v1fedmux.Handle("/make_leave/{roomID}/{eventID}", common.MakeFedAPI(
 		"federation_make_leave", cfg.Matrix.ServerName, keys,
 		func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse {
 			vars, err := common.URLDecodeMapValues(mux.Vars(httpReq))
@@ -236,14 +250,14 @@ func Setup(
 				return util.ErrorResponse(err)
 			}
 			roomID := vars["roomID"]
-			userID := vars["userID"]
+			eventID := vars["eventID"]
 			return MakeLeave(
-				httpReq, request, cfg, query, roomID, userID,
+				httpReq, request, cfg, query, roomID, eventID,
 			)
 		},
 	)).Methods(http.MethodGet)
 
-	v2fedmux.Handle("/send_leave/{roomID}/{userID}", common.MakeFedAPI(
+	v2fedmux.Handle("/send_leave/{roomID}/{eventID}", common.MakeFedAPI(
 		"federation_send_leave", cfg.Matrix.ServerName, keys,
 		func(httpReq *http.Request, request *gomatrixserverlib.FederationRequest) util.JSONResponse {
 			vars, err := common.URLDecodeMapValues(mux.Vars(httpReq))
@@ -251,9 +265,9 @@ func Setup(
 				return util.ErrorResponse(err)
 			}
 			roomID := vars["roomID"]
-			userID := vars["userID"]
+			eventID := vars["eventID"]
 			return SendLeave(
-				httpReq, request, cfg, producer, keys, roomID, userID,
+				httpReq, request, cfg, producer, keys, roomID, eventID,
 			)
 		},
 	)).Methods(http.MethodPut)

federationapi/routing/state.go

@@ -107,7 +107,6 @@ func getState(
 		return nil, &util.JSONResponse{Code: http.StatusNotFound, JSON: nil}
 	}
 
-	prevEventIDs := getIDsFromEventRef(event.PrevEvents())
 	authEventIDs := getIDsFromEventRef(event.AuthEvents())
 
 	var response api.QueryStateAndAuthChainResponse
@@ -115,7 +114,7 @@ func getState(
 		ctx,
 		&api.QueryStateAndAuthChainRequest{
 			RoomID:       roomID,
-			PrevEventIDs: prevEventIDs,
+			PrevEventIDs: []string{eventID},
 			AuthEventIDs: authEventIDs,
 		},
 		&response,

federationsender/api/query.go

@@ -2,6 +2,7 @@ package api
 
 import (
 	"context"
+	"errors"
 	"net/http"
 
 	commonHTTP "github.com/matrix-org/dendrite/common/http"
@@ -58,12 +59,12 @@ const FederationSenderQueryJoinedHostsInRoomPath = "/api/federationsender/queryJ
 const FederationSenderQueryJoinedHostServerNamesInRoomPath = "/api/federationsender/queryJoinedHostServerNamesInRoom"
 
 // NewFederationSenderQueryAPIHTTP creates a FederationSenderQueryAPI implemented by talking to a HTTP POST API.
-// If httpClient is nil then it uses the http.DefaultClient
+// If httpClient is nil an error is returned
-func NewFederationSenderQueryAPIHTTP(federationSenderURL string, httpClient *http.Client) FederationSenderQueryAPI {
+func NewFederationSenderQueryAPIHTTP(federationSenderURL string, httpClient *http.Client) (FederationSenderQueryAPI, error) {
 	if httpClient == nil {
-		httpClient = http.DefaultClient
+		return nil, errors.New("NewFederationSenderQueryAPIHTTP: httpClient is <nil>")
 	}
-	return &httpFederationSenderQueryAPI{federationSenderURL, httpClient}
+	return &httpFederationSenderQueryAPI{federationSenderURL, httpClient}, nil
 }
 
 type httpFederationSenderQueryAPI struct {

federationsender/consumers/roomserver.go

@@ -32,6 +32,7 @@ import (
 
 // OutputRoomEventConsumer consumes events that originated in the room server.
 type OutputRoomEventConsumer struct {
+	cfg                *config.Dendrite
 	roomServerConsumer *common.ContinualConsumer
 	db                 storage.Database
 	queues             *queue.OutgoingQueues
@@ -52,6 +53,7 @@ func NewOutputRoomEventConsumer(
 		PartitionStore: store,
 	}
 	s := &OutputRoomEventConsumer{
+		cfg:                cfg,
 		roomServerConsumer: &consumer,
 		db:                 store,
 		queues:             queues,
@@ -79,29 +81,48 @@ func (s *OutputRoomEventConsumer) onMessage(msg *sarama.ConsumerMessage) error {
 		log.WithError(err).Errorf("roomserver output log: message parse failure")
 		return nil
 	}
-	if output.Type != api.OutputTypeNewRoomEvent {
+
+	switch output.Type {
+	case api.OutputTypeNewRoomEvent:
+		ev := &output.NewRoomEvent.Event
+		log.WithFields(log.Fields{
+			"event_id":       ev.EventID(),
+			"room_id":        ev.RoomID(),
+			"send_as_server": output.NewRoomEvent.SendAsServer,
+		}).Info("received room event from roomserver")
+
+		if err := s.processMessage(*output.NewRoomEvent); err != nil {
+			// panic rather than continue with an inconsistent database
+			log.WithFields(log.Fields{
+				"event":      string(ev.JSON()),
+				"add":        output.NewRoomEvent.AddsStateEventIDs,
+				"del":        output.NewRoomEvent.RemovesStateEventIDs,
+				log.ErrorKey: err,
+			}).Panicf("roomserver output log: write room event failure")
+			return nil
+		}
+	case api.OutputTypeNewInviteEvent:
+		ev := &output.NewInviteEvent.Event
+		log.WithFields(log.Fields{
+			"event_id":  ev.EventID(),
+			"room_id":   ev.RoomID(),
+			"state_key": ev.StateKey(),
+		}).Info("received invite event from roomserver")
+
+		if err := s.processInvite(*output.NewInviteEvent); err != nil {
+			// panic rather than continue with an inconsistent database
+			log.WithFields(log.Fields{
+				"event":      string(ev.JSON()),
+				log.ErrorKey: err,
+			}).Panicf("roomserver output log: write invite event failure")
+			return nil
+		}
+	default:
 		log.WithField("type", output.Type).Debug(
 			"roomserver output log: ignoring unknown output type",
 		)
 		return nil
 	}
-	ev := &output.NewRoomEvent.Event
-	log.WithFields(log.Fields{
-		"event_id":       ev.EventID(),
-		"room_id":        ev.RoomID(),
-		"send_as_server": output.NewRoomEvent.SendAsServer,
-	}).Info("received event from roomserver")
-
-	if err := s.processMessage(*output.NewRoomEvent); err != nil {
-		// panic rather than continue with an inconsistent database
-		log.WithFields(log.Fields{
-			"event":      string(ev.JSON()),
-			log.ErrorKey: err,
-			"add":        output.NewRoomEvent.AddsStateEventIDs,
-			"del":        output.NewRoomEvent.RemovesStateEventIDs,
-		}).Panicf("roomserver output log: write event failure")
-		return nil
-	}
 
 	return nil
 }
@@ -159,6 +180,69 @@ func (s *OutputRoomEventConsumer) processMessage(ore api.OutputNewRoomEvent) err
 	)
 }
 
+// processInvite handles an invite event for sending over federation.
+func (s *OutputRoomEventConsumer) processInvite(oie api.OutputNewInviteEvent) error {
+	// Don't try to reflect and resend invites that didn't originate from us.
+	if s.cfg.Matrix.ServerName != oie.Event.Origin() {
+		return nil
+	}
+
+	// When sending a v2 invite, the inviting server should try and include
+	// a "stripped down" version of the room state. This is pretty much just
+	// enough information for the remote side to show something useful to the
+	// user, like the room name, aliases etc.
+	strippedState := []gomatrixserverlib.InviteV2StrippedState{}
+	stateWanted := []string{
+		gomatrixserverlib.MRoomName, gomatrixserverlib.MRoomCanonicalAlias,
+		gomatrixserverlib.MRoomAliases, gomatrixserverlib.MRoomJoinRules,
+	}
+
+	// For each of the state keys that we want to try and send, ask the
+	// roomserver if we have a state event for that room that matches the
+	// state key.
+	for _, wanted := range stateWanted {
+		queryReq := api.QueryLatestEventsAndStateRequest{
+			RoomID: oie.Event.RoomID(),
+			StateToFetch: []gomatrixserverlib.StateKeyTuple{
+				gomatrixserverlib.StateKeyTuple{
+					EventType: wanted,
+					StateKey:  "",
+				},
+			},
+		}
+		// If this fails then we just move onto the next event - we don't
+		// actually know at this point whether the room even has that type
+		// of state.
+		queryRes := api.QueryLatestEventsAndStateResponse{}
+		if err := s.query.QueryLatestEventsAndState(context.TODO(), &queryReq, &queryRes); err != nil {
+			log.WithFields(log.Fields{
+				"room_id":    queryReq.RoomID,
+				"event_type": wanted,
+			}).WithError(err).Info("couldn't find state to strip")
+			continue
+		}
+		// Append the stripped down copy of the state to our list.
+		for _, headeredEvent := range queryRes.StateEvents {
+			event := headeredEvent.Unwrap()
+			strippedState = append(strippedState, gomatrixserverlib.NewInviteV2StrippedState(&event))
+
+			log.WithFields(log.Fields{
+				"room_id":    queryReq.RoomID,
+				"event_type": event.Type(),
+			}).Info("adding stripped state")
+		}
+	}
+
+	// Build the invite request with the info we've got.
+	inviteReq, err := gomatrixserverlib.NewInviteV2Request(&oie.Event, strippedState)
+	if err != nil {
+		return fmt.Errorf("gomatrixserverlib.NewInviteV2Request: %w", err)
+	}
+
+	// Send the event.
+	return s.queues.SendInvite(&inviteReq)
+}
+
 // joinedHostsAtEvent works out a list of matrix servers that were joined to
 // the room at the event.
 // It is important to use the state at the event for sending messages because:

federationsender/queue/destinationqueue.go

@@ -24,6 +24,7 @@ import (
 	"github.com/matrix-org/gomatrixserverlib"
 	"github.com/matrix-org/util"
 	log "github.com/sirupsen/logrus"
+	"go.uber.org/atomic"
 )
 
 // destinationQueue is a queue of events for a single destination.
@@ -34,14 +35,15 @@ type destinationQueue struct {
 	client      *gomatrixserverlib.FederationClient
 	origin      gomatrixserverlib.ServerName
 	destination gomatrixserverlib.ServerName
-	// The running mutex protects running, sentCounter, lastTransactionIDs and
+	running     atomic.Bool
+	// The running mutex protects sentCounter, lastTransactionIDs and
 	// pendingEvents, pendingEDUs.
 	runningMutex       sync.Mutex
-	running            bool
 	sentCounter        int
 	lastTransactionIDs []gomatrixserverlib.TransactionID
 	pendingEvents      []*gomatrixserverlib.HeaderedEvent
 	pendingEDUs        []*gomatrixserverlib.EDU
+	pendingInvites     []*gomatrixserverlib.InviteV2Request
 }
 
 // Send event adds the event to the pending queue for the destination.
@@ -51,29 +53,43 @@ func (oq *destinationQueue) sendEvent(ev *gomatrixserverlib.HeaderedEvent) {
 	oq.runningMutex.Lock()
 	defer oq.runningMutex.Unlock()
 	oq.pendingEvents = append(oq.pendingEvents, ev)
-	if !oq.running {
+	if !oq.running.Load() {
-		oq.running = true
 		go oq.backgroundSend()
 	}
 }
 
 // sendEDU adds the EDU event to the pending queue for the destination.
 // If the queue is empty then it starts a background goroutine to
-// start sending event to that destination.
+// start sending events to that destination.
 func (oq *destinationQueue) sendEDU(e *gomatrixserverlib.EDU) {
 	oq.runningMutex.Lock()
 	defer oq.runningMutex.Unlock()
 	oq.pendingEDUs = append(oq.pendingEDUs, e)
-	if !oq.running {
+	if !oq.running.Load() {
-		oq.running = true
 		go oq.backgroundSend()
 	}
 }
 
+// sendInvite adds the invite event to the pending queue for the
+// destination. If the queue is empty then it starts a background
+// goroutine to start sending events to that destination.
+func (oq *destinationQueue) sendInvite(ev *gomatrixserverlib.InviteV2Request) {
+	oq.runningMutex.Lock()
+	defer oq.runningMutex.Unlock()
+	oq.pendingInvites = append(oq.pendingInvites, ev)
+	if !oq.running.Load() {
+		go oq.backgroundSend()
+	}
+}
+
+// backgroundSend is the worker goroutine for sending events.
 func (oq *destinationQueue) backgroundSend() {
+	oq.running.Store(true)
+	defer oq.running.Store(false)
+
 	for {
-		t := oq.next()
+		transaction, invites := oq.nextTransaction(), oq.nextInvites()
-		if t == nil {
+		if !transaction && !invites {
 			// If the queue is empty then stop processing for this destination.
 			// TODO: Remove this destination from the queue map.
 			return
@@ -81,29 +97,18 @@ func (oq *destinationQueue) backgroundSend() {
 
 		// TODO: handle retries.
 		// TODO: blacklist uncooperative servers.
-
-		util.GetLogger(context.TODO()).Infof("Sending transaction %q containing %d PDUs, %d EDUs", t.TransactionID, len(t.PDUs), len(t.EDUs))
-
-		_, err := oq.client.SendTransaction(context.TODO(), *t)
-		if err != nil {
-			log.WithFields(log.Fields{
-				"destination": oq.destination,
-				log.ErrorKey:  err,
-			}).Info("problem sending transaction")
-		}
 	}
 }
 
-// next creates a new transaction from the pending event queue
+// nextTransaction creates a new transaction from the pending event
-// and flushes the queue.
+// queue and sends it. Returns true if a transaction was sent or
-// Returns nil if the queue was empty.
+// false otherwise.
-func (oq *destinationQueue) next() *gomatrixserverlib.Transaction {
+func (oq *destinationQueue) nextTransaction() bool {
 	oq.runningMutex.Lock()
 	defer oq.runningMutex.Unlock()
 
 	if len(oq.pendingEvents) == 0 && len(oq.pendingEDUs) == 0 {
-		oq.running = false
+		return false
-		return nil
 	}
 
 	t := gomatrixserverlib.Transaction{
@@ -136,5 +141,46 @@ func (oq *destinationQueue) next() *gomatrixserverlib.Transaction {
 	oq.pendingEDUs = nil
 	oq.sentCounter += len(t.EDUs)
 
-	return &t
+	util.GetLogger(context.TODO()).Infof("Sending transaction %q containing %d PDUs, %d EDUs", t.TransactionID, len(t.PDUs), len(t.EDUs))
+
+	_, err := oq.client.SendTransaction(context.TODO(), t)
+	if err != nil {
+		log.WithFields(log.Fields{
+			"destination": oq.destination,
+			log.ErrorKey:  err,
+		}).Info("problem sending transaction")
+	}
+
+	return true
+}
+
+// nextInvite takes pending invite events from the queue and sends
+// them. Returns true if a transaction was sent or false otherwise.
+func (oq *destinationQueue) nextInvites() bool {
+	oq.runningMutex.Lock()
+	defer oq.runningMutex.Unlock()
+
+	if len(oq.pendingInvites) == 0 {
+		return false
+	}
+
+	for _, inviteReq := range oq.pendingInvites {
+		ev := inviteReq.Event()
+
+		if _, err := oq.client.SendInviteV2(
+			context.TODO(),
+			oq.destination,
+			*inviteReq,
+		); err != nil {
+			log.WithFields(log.Fields{
+				"event_id":    ev.EventID(),
+				"state_key":   ev.StateKey(),
+				"destination": oq.destination,
+			}).WithError(err).Error("failed to send invite")
+		}
+	}
+
+	oq.pendingInvites = nil
+
+	return true
 }

federationsender/queue/queue.go

@@ -80,6 +80,49 @@ func (oqs *OutgoingQueues) SendEvent(
 	return nil
 }
 
+// SendEvent sends an event to the destinations
+func (oqs *OutgoingQueues) SendInvite(
+	inviteReq *gomatrixserverlib.InviteV2Request,
+) error {
+	ev := inviteReq.Event()
+	stateKey := ev.StateKey()
+	if stateKey == nil {
+		log.WithFields(log.Fields{
+			"event_id": ev.EventID(),
+		}).Info("invite had no state key, dropping")
+		return nil
+	}
+
+	_, destination, err := gomatrixserverlib.SplitID('@', *stateKey)
+	if err != nil {
+		log.WithFields(log.Fields{
+			"event_id":  ev.EventID(),
+			"state_key": stateKey,
+		}).Info("failed to split destination from state key")
+		return nil
+	}
+
+	log.WithFields(log.Fields{
+		"event_id": ev.EventID(),
+	}).Info("Sending invite")
+
+	oqs.queuesMutex.Lock()
+	defer oqs.queuesMutex.Unlock()
+	oq := oqs.queues[destination]
+	if oq == nil {
+		oq = &destinationQueue{
+			origin:      oqs.origin,
+			destination: destination,
+			client:      oqs.client,
+		}
+		oqs.queues[destination] = oq
+	}
+
+	oq.sendInvite(inviteReq)
+
+	return nil
+}
+
 // SendEDU sends an EDU event to the destinations
 func (oqs *OutgoingQueues) SendEDU(
 	e *gomatrixserverlib.EDU, origin gomatrixserverlib.ServerName,

go.mod

@@ -9,7 +9,7 @@ require (
 	github.com/matrix-org/go-http-js-libp2p v0.0.0-20200318135427-31631a9ef51f
 	github.com/matrix-org/go-sqlite3-js v0.0.0-20200325174927-327088cdef10
 	github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26
-	github.com/matrix-org/gomatrixserverlib v0.0.0-20200327155501-33fb4c7049dc
+	github.com/matrix-org/gomatrixserverlib v0.0.0-20200409140603-8b9a51fe9b89
 	github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1
 	github.com/matrix-org/util v0.0.0-20190711121626-527ce5ddefc7
 	github.com/mattn/go-sqlite3 v2.0.2+incompatible
@@ -23,9 +23,9 @@ require (
 	github.com/tidwall/pretty v1.0.1 // indirect
 	github.com/uber/jaeger-client-go v2.22.1+incompatible
 	github.com/uber/jaeger-lib v2.2.0+incompatible
-	go.uber.org/atomic v1.6.0 // indirect
+	go.uber.org/atomic v1.6.0
 	golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d
-	golang.org/x/net v0.0.0-20190909003024-a7b16738d86b // indirect
+	golang.org/x/tools v0.0.0-20200402223321-bcf690261a44 // indirect
 	gopkg.in/Shopify/sarama.v1 v1.20.1
 	gopkg.in/h2non/bimg.v1 v1.0.18
 	gopkg.in/yaml.v2 v2.2.5

go.sum

@@ -130,8 +130,8 @@ github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26 h1:Hr3zjRsq2bh
 github.com/matrix-org/gomatrix v0.0.0-20190528120928-7df988a63f26/go.mod h1:3fxX6gUjWyI/2Bt7J1OLhpCzOfO/bB3AiX0cJtEKud0=
 github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5 h1:kmRjpmFOenVpOaV/DRlo9p6z/IbOKlUC+hhKsAAh8Qg=
 github.com/matrix-org/gomatrixserverlib v0.0.0-20200124100636-0c2ec91d1df5/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20200327155501-33fb4c7049dc h1:qrRu4/AlulnldLiyGpYYm+ELIkrP51XCRlA3txWpN30=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20200409140603-8b9a51fe9b89 h1:YAlUJK/Ty2ZrP/DL41CiR0Cp3pteshnyIS420KVs220=
-github.com/matrix-org/gomatrixserverlib v0.0.0-20200327155501-33fb4c7049dc/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
+github.com/matrix-org/gomatrixserverlib v0.0.0-20200409140603-8b9a51fe9b89/go.mod h1:FsKa2pWE/bpQql9H7U4boOPXFoJX/QcqaZZ6ijLkaZI=
 github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1 h1:osLoFdOy+ChQqVUn2PeTDETFftVkl4w9t/OW18g3lnk=
 github.com/matrix-org/naffka v0.0.0-20200127221512-0716baaabaf1/go.mod h1:cXoYQIENbdWIQHt1SyCo6Bl3C3raHwJ0wgVrXHSqf+A=
 github.com/matrix-org/util v0.0.0-20171127121716-2e2df66af2f5 h1:W7l5CP4V7wPyPb4tYE11dbmeAOwtFQBTW0rf4OonOS8=
@@ -253,6 +253,7 @@ github.com/uber/jaeger-lib v1.5.0/go.mod h1:ComeNDZlWwrWnDv8aPp0Ba6+uUTzImX/Aaua
 github.com/uber/jaeger-lib v2.2.0+incompatible h1:MxZXOiR2JuoANZ3J6DE/U0kSFv/eJ/GfSYVCjK7dyaw=
 github.com/uber/jaeger-lib v2.2.0+incompatible/go.mod h1:ComeNDZlWwrWnDv8aPp0Ba6+uUTzImX/AauajbLI56U=
 github.com/x-cray/logrus-prefixed-formatter v0.5.2/go.mod h1:2duySbKsL6M18s5GU7VPsoEPHyzalCE06qoARUCeBBE=
+github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.uber.org/atomic v1.3.0 h1:vs7fgriifsPbGdK3bNuMWapNn3qnZhCRXc19NRdq010=
 go.uber.org/atomic v1.3.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
@@ -276,6 +277,8 @@ golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvx
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de h1:5hukYrvBGR8/eNkX5mdUezrA6JiaEZDtJb9Ei+1LlBs=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
+golang.org/x/mod v0.2.0 h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
+golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -288,8 +291,8 @@ golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859 h1:R/3boaszxrf1GEUWTVDzSKVwLmSJpwZ1yqXm8j0v2QI=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20190909003024-a7b16738d86b h1:XfVGCX+0T4WOStkaOsJRllbsiImhB2jgVBGc9L0lPGc=
+golang.org/x/net v0.0.0-20200226121028-0de0cce0169b h1:0mm1VjtFUOIlE1SbDlwjYaDxZVDP2S5ou6y0gSgXHu8=
-golang.org/x/net v0.0.0-20190909003024-a7b16738d86b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -324,7 +327,11 @@ golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c h1:IGkKhmfzcztjm6gYkykvu/NiS8kaqbCWAEWWAyf8J5U=
 golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200402223321-bcf690261a44 h1:bMm0eoDiGkM5VfIyKjxDvoflW5GLp7+VCo+60n8F+TE=
+golang.org/x/tools v0.0.0-20200402223321-bcf690261a44/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=

roomserver/api/alias.go

@@ -16,6 +16,7 @@ package api
 
 import (
 	"context"
+	"errors"
 	"net/http"
 
 	commonHTTP "github.com/matrix-org/dendrite/common/http"
@@ -139,12 +140,12 @@ const RoomserverGetCreatorIDForAliasPath = "/api/roomserver/GetCreatorIDForAlias
 const RoomserverRemoveRoomAliasPath = "/api/roomserver/removeRoomAlias"
 
 // NewRoomserverAliasAPIHTTP creates a RoomserverAliasAPI implemented by talking to a HTTP POST API.
-// If httpClient is nil then it uses the http.DefaultClient
+// If httpClient is nil an error is returned
-func NewRoomserverAliasAPIHTTP(roomserverURL string, httpClient *http.Client) RoomserverAliasAPI {
+func NewRoomserverAliasAPIHTTP(roomserverURL string, httpClient *http.Client) (RoomserverAliasAPI, error) {
 	if httpClient == nil {
-		httpClient = http.DefaultClient
+		return nil, errors.New("NewRoomserverAliasAPIHTTP: httpClient is <nil>")
 	}
-	return &httpRoomserverAliasAPI{roomserverURL, httpClient}
+	return &httpRoomserverAliasAPI{roomserverURL, httpClient}, nil
 }
 
 type httpRoomserverAliasAPI struct {

roomserver/api/input.go

@@ -17,6 +17,7 @@ package api
 
 import (
 	"context"
+	"errors"
 	"net/http"
 
 	commonHTTP "github.com/matrix-org/dendrite/common/http"
@@ -85,7 +86,9 @@ type TransactionID struct {
 // the usual context a matrix room event would have. We usually do not have
 // access to the events needed to check the event auth rules for the invite.
 type InputInviteEvent struct {
-	Event gomatrixserverlib.HeaderedEvent `json:"event"`
+	RoomVersion     gomatrixserverlib.RoomVersion             `json:"room_version"`
+	Event           gomatrixserverlib.HeaderedEvent           `json:"event"`
+	InviteRoomState []gomatrixserverlib.InviteV2StrippedState `json:"invite_room_state"`
 }
 
 // InputRoomEventsRequest is a request to InputRoomEvents
@@ -112,12 +115,12 @@ type RoomserverInputAPI interface {
 const RoomserverInputRoomEventsPath = "/api/roomserver/inputRoomEvents"
 
 // NewRoomserverInputAPIHTTP creates a RoomserverInputAPI implemented by talking to a HTTP POST API.
-// If httpClient is nil then it uses the http.DefaultClient
+// If httpClient is nil an error is returned
-func NewRoomserverInputAPIHTTP(roomserverURL string, httpClient *http.Client) RoomserverInputAPI {
+func NewRoomserverInputAPIHTTP(roomserverURL string, httpClient *http.Client) (RoomserverInputAPI, error) {
 	if httpClient == nil {
-		httpClient = http.DefaultClient
+		return nil, errors.New("NewRoomserverInputAPIHTTP: httpClient is <nil>")
 	}
-	return &httpRoomserverInputAPI{roomserverURL, httpClient}
+	return &httpRoomserverInputAPI{roomserverURL, httpClient}, nil
 }
 
 type httpRoomserverInputAPI struct {

roomserver/api/output.go

@@ -116,6 +116,8 @@ type OutputNewRoomEvent struct {
 // Invite events can be received outside of an existing room so have to be
 // tracked separately from the room events themselves.
 type OutputNewInviteEvent struct {
+	// The room version of the invited room.
+	RoomVersion gomatrixserverlib.RoomVersion `json:"room_version"`
 	// The "m.room.member" invite event.
 	Event gomatrixserverlib.HeaderedEvent `json:"event"`
 }

roomserver/api/query.go

@@ -18,6 +18,7 @@ package api
 
 import (
 	"context"
+	"errors"
 	"net/http"
 
 	commonHTTP "github.com/matrix-org/dendrite/common/http"
@@ -202,6 +203,9 @@ type QueryStateAndAuthChainRequest struct {
 	PrevEventIDs []string `json:"prev_event_ids"`
 	// The list of auth events for the event. Used to calculate the auth chain
 	AuthEventIDs []string `json:"auth_event_ids"`
+	// Should state resolution be ran on the result events?
+	// TODO: check call sites and remove if we always want to do state res
+	ResolveState bool `json:"resolve_state"`
 }
 
 // QueryStateAndAuthChainResponse is a response to QueryStateAndAuthChain
@@ -406,12 +410,12 @@ const RoomserverQueryRoomVersionCapabilitiesPath = "/api/roomserver/queryRoomVer
 const RoomserverQueryRoomVersionForRoomPath = "/api/roomserver/queryRoomVersionForRoom"
 
 // NewRoomserverQueryAPIHTTP creates a RoomserverQueryAPI implemented by talking to a HTTP POST API.
-// If httpClient is nil then it uses the http.DefaultClient
+// If httpClient is nil an error is returned
-func NewRoomserverQueryAPIHTTP(roomserverURL string, httpClient *http.Client) RoomserverQueryAPI {
+func NewRoomserverQueryAPIHTTP(roomserverURL string, httpClient *http.Client) (RoomserverQueryAPI, error) {
 	if httpClient == nil {
-		httpClient = http.DefaultClient
+		return nil, errors.New("NewRoomserverQueryAPIHTTP: httpClient is <nil>")
 	}
-	return &httpRoomserverQueryAPI{roomserverURL, httpClient}
+	return &httpRoomserverQueryAPI{roomserverURL, httpClient}, nil
 }
 
 type httpRoomserverQueryAPI struct {

roomserver/input/events.go

@@ -26,6 +26,7 @@ import (
 	"github.com/matrix-org/dendrite/roomserver/state/database"
 	"github.com/matrix-org/dendrite/roomserver/types"
 	"github.com/matrix-org/gomatrixserverlib"
+	log "github.com/sirupsen/logrus"
 )
 
 // A RoomEventDatabase has the storage APIs needed to store a room event.
@@ -64,6 +65,7 @@ type RoomEventDatabase interface {
 	// Build a membership updater for the target user in a room.
 	MembershipUpdater(
 		ctx context.Context, roomID, targerUserID string,
+		roomVersion gomatrixserverlib.RoomVersion,
 	) (types.MembershipUpdater, error)
 	// Look up event ID by transaction's info.
 	// This is used to determine if the room event is processed/processing already.
@@ -193,7 +195,14 @@ func processInviteEvent(
 	roomID := input.Event.RoomID()
 	targetUserID := *input.Event.StateKey()
 
-	updater, err := db.MembershipUpdater(ctx, roomID, targetUserID)
+	log.WithFields(log.Fields{
+		"event_id":       input.Event.EventID(),
+		"room_id":        roomID,
+		"room_version":   input.RoomVersion,
+		"target_user_id": targetUserID,
+	}).Info("processing invite event")
+
+	updater, err := db.MembershipUpdater(ctx, roomID, targetUserID, input.RoomVersion)
 	if err != nil {
 		return err
 	}
@@ -237,7 +246,12 @@ func processInviteEvent(
 	}
 
 	event := input.Event.Unwrap()
-	outputUpdates, err := updateToInviteMembership(updater, &event, nil)
+
+	if err = event.SetUnsignedField("invite_room_state", input.InviteRoomState); err != nil {
+		return err
+	}
+
+	outputUpdates, err := updateToInviteMembership(updater, &event, nil, input.Event.RoomVersion)
 	if err != nil {
 		return err
 	}

roomserver/input/membership.go

@@ -112,7 +112,7 @@ func updateMembership(
 
 	switch newMembership {
 	case gomatrixserverlib.Invite:
-		return updateToInviteMembership(mu, add, updates)
+		return updateToInviteMembership(mu, add, updates, updater.RoomVersion())
 	case gomatrixserverlib.Join:
 		return updateToJoinMembership(mu, add, updates)
 	case gomatrixserverlib.Leave, gomatrixserverlib.Ban:
@@ -126,6 +126,7 @@ func updateMembership(
 
 func updateToInviteMembership(
 	mu types.MembershipUpdater, add *gomatrixserverlib.Event, updates []api.OutputEvent,
+	roomVersion gomatrixserverlib.RoomVersion,
 ) ([]api.OutputEvent, error) {
 	// We may have already sent the invite to the user, either because we are
 	// reprocessing this event, or because the we received this invite from a
@@ -136,14 +137,14 @@ func updateToInviteMembership(
 		return nil, err
 	}
 	if needsSending {
-		roomVersion := gomatrixserverlib.RoomVersionV1
 		// We notify the consumers using a special event even though we will
 		// notify them about the change in current state as part of the normal
 		// room event stream. This ensures that the consumers only have to
 		// consider a single stream of events when determining whether a user
 		// is invited, rather than having to combine multiple streams themselves.
 		onie := api.OutputNewInviteEvent{
-			Event: (*add).Headered(roomVersion),
+			Event:       (*add).Headered(roomVersion),
+			RoomVersion: roomVersion,
 		}
 		updates = append(updates, api.OutputEvent{
 			Type:           api.OutputTypeNewInviteEvent,

roomserver/query/query.go

@@ -132,7 +132,7 @@ func (r *RoomserverQueryAPI) QueryLatestEventsAndState(
 		return err
 	}
 
-	// Look up the currrent state for the requested tuples.
+	// Look up the current state for the requested tuples.
 	stateEntries, err := roomState.LoadStateAtSnapshotForStringTuples(
 		ctx, currentStateSnapshotNID, request.StateToFetch,
 	)
@@ -736,6 +736,14 @@ func (r *RoomserverQueryAPI) QueryStateAndAuthChain(
 		return err
 	}
 
+	if request.ResolveState {
+		if stateEvents, err = state.ResolveConflictsAdhoc(
+			roomVersion, stateEvents, authEvents,
+		); err != nil {
+			return err
+		}
+	}
+
 	for _, event := range stateEvents {
 		response.StateEvents = append(response.StateEvents, event.Headered(roomVersion))
 	}

roomserver/state/state.go

@@ -18,7 +18,6 @@ package state
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"sort"
 	"time"
@@ -681,6 +680,83 @@ func (v StateResolution) calculateStateAfterManyEvents(
 	return
 }
 
+// ResolveConflictsAdhoc is a helper function to assist the query API in
+// performing state resolution when requested. This is a different code
+// path to the rest of state.go because this assumes you already have
+// gomatrixserverlib.Event objects and not just a bunch of NIDs like
+// elsewhere in the state resolution.
+// TODO: Some of this can possibly be deduplicated
+func ResolveConflictsAdhoc(
+	version gomatrixserverlib.RoomVersion,
+	events []gomatrixserverlib.Event,
+	authEvents []gomatrixserverlib.Event,
+) ([]gomatrixserverlib.Event, error) {
+	type stateKeyTuple struct {
+		Type     string
+		StateKey string
+	}
+
+	// Prepare our data structures.
+	eventMap := make(map[stateKeyTuple][]gomatrixserverlib.Event)
+	var conflicted, notConflicted, resolved []gomatrixserverlib.Event
+
+	// Run through all of the events that we were given and sort them
+	// into a map, sorted by (event_type, state_key) tuple. This means
+	// that we can easily spot events that are "conflicted", e.g.
+	// there are duplicate values for the same tuple key.
+	for _, event := range events {
+		if event.StateKey() == nil {
+			// Ignore events that are not state events.
+			continue
+		}
+		// Append the events if there is already a conflicted list for
+		// this tuple key, create it if not.
+		tuple := stateKeyTuple{event.Type(), *event.StateKey()}
+		if _, ok := eventMap[tuple]; ok {
+			eventMap[tuple] = append(eventMap[tuple], event)
+		} else {
+			eventMap[tuple] = []gomatrixserverlib.Event{event}
+		}
+	}
+
+	// Split out the events in the map into conflicted and unconflicted
+	// buckets. The conflicted events will be ran through state res,
+	// whereas unconfliced events will always going to appear in the
+	// final resolved state.
+	for _, list := range eventMap {
+		if len(list) > 1 {
+			conflicted = append(conflicted, list...)
+		} else {
+			notConflicted = append(notConflicted, list...)
+		}
+	}
+
+	// Work out which state resolution algorithm we want to run for
+	// the room version.
+	stateResAlgo, err := version.StateResAlgorithm()
+	if err != nil {
+		return nil, err
+	}
+	switch stateResAlgo {
+	case gomatrixserverlib.StateResV1:
+		// Currently state res v1 doesn't handle unconflicted events
+		// for us, like state res v2 does, so we will need to add the
+		// unconflicted events into the state ourselves.
+		// TODO: Fix state res v1 so this is handled for the caller.
+		resolved = gomatrixserverlib.ResolveStateConflicts(conflicted, authEvents)
+		resolved = append(resolved, notConflicted...)
+	case gomatrixserverlib.StateResV2:
+		// TODO: auth difference here?
+		resolved = gomatrixserverlib.ResolveStateConflictsV2(conflicted, notConflicted, authEvents, authEvents)
+	default:
+		return nil, fmt.Errorf("unsupported state resolution algorithm %v", stateResAlgo)
+	}
+
+	// Return the final resolved state events, including both the
+	// resolved set of conflicted events, and the unconflicted events.
+	return resolved, nil
+}
+
 func (v StateResolution) resolveConflicts(
 	ctx context.Context, version gomatrixserverlib.RoomVersion,
 	notConflicted, conflicted []types.StateEntry,
@@ -695,7 +771,7 @@ func (v StateResolution) resolveConflicts(
 	case gomatrixserverlib.StateResV2:
 		return v.resolveConflictsV2(ctx, notConflicted, conflicted)
 	}
-	return nil, errors.New("unsupported state resolution algorithm")
+	return nil, fmt.Errorf("unsupported state resolution algorithm %v", stateResAlgo)
 }
 
 // resolveConflicts resolves a list of conflicted state entries. It takes two lists.

roomserver/storage/interface.go

@@ -41,7 +41,7 @@ type Database interface {
 	GetAliasesForRoomID(ctx context.Context, roomID string) ([]string, error)
 	GetCreatorIDForAlias(ctx context.Context, alias string) (string, error)
 	RemoveRoomAlias(ctx context.Context, alias string) error
-	MembershipUpdater(ctx context.Context, roomID, targetUserID string) (types.MembershipUpdater, error)
+	MembershipUpdater(ctx context.Context, roomID, targetUserID string, roomVersion gomatrixserverlib.RoomVersion) (types.MembershipUpdater, error)
 	GetMembership(ctx context.Context, roomNID types.RoomNID, requestSenderUserID string) (membershipEventNID types.EventNID, stillInRoom bool, err error)
 	GetMembershipEventNIDsForRoom(ctx context.Context, roomNID types.RoomNID, joinOnly bool) ([]types.EventNID, error)
 	EventsFromIDs(ctx context.Context, eventIDs []string) ([]types.Event, error)

roomserver/storage/postgres/storage.go

@@ -393,6 +393,12 @@ type roomRecentEventsUpdater struct {
 	currentStateSnapshotNID types.StateSnapshotNID
 }
 
+// RoomVersion implements types.RoomRecentEventsUpdater
+func (u *roomRecentEventsUpdater) RoomVersion() (version gomatrixserverlib.RoomVersion) {
+	version, _ = u.d.GetRoomVersionForRoomNID(u.ctx, u.roomNID)
+	return
+}
+
 // LatestEvents implements types.RoomRecentEventsUpdater
 func (u *roomRecentEventsUpdater) LatestEvents() []types.StateAtEventAndReference {
 	return u.latestEvents
@@ -534,6 +540,7 @@ func (d *Database) StateEntriesForTuples(
 // MembershipUpdater implements input.RoomEventDatabase
 func (d *Database) MembershipUpdater(
 	ctx context.Context, roomID, targetUserID string,
+	roomVersion gomatrixserverlib.RoomVersion,
 ) (types.MembershipUpdater, error) {
 	txn, err := d.db.Begin()
 	if err != nil {
@@ -546,8 +553,7 @@ func (d *Database) MembershipUpdater(
 		}
 	}()
 
-	// TODO: Room version here
+	roomNID, err := d.assignRoomNID(ctx, txn, roomID, roomVersion)
-	roomNID, err := d.assignRoomNID(ctx, txn, roomID, "1")
 	if err != nil {
 		return nil, err
 	}

roomserver/storage/sqlite3/storage.go

@@ -486,6 +486,12 @@ type roomRecentEventsUpdater struct {
 	currentStateSnapshotNID types.StateSnapshotNID
 }
 
+// RoomVersion implements types.RoomRecentEventsUpdater
+func (u *roomRecentEventsUpdater) RoomVersion() (version gomatrixserverlib.RoomVersion) {
+	version, _ = u.d.GetRoomVersionForRoomNID(u.ctx, u.roomNID)
+	return
+}
+
 // LatestEvents implements types.RoomRecentEventsUpdater
 func (u *roomRecentEventsUpdater) LatestEvents() []types.StateAtEventAndReference {
 	return u.latestEvents
@@ -657,6 +663,7 @@ func (d *Database) StateEntriesForTuples(
 // MembershipUpdater implements input.RoomEventDatabase
 func (d *Database) MembershipUpdater(
 	ctx context.Context, roomID, targetUserID string,
+	roomVersion gomatrixserverlib.RoomVersion,
 ) (updater types.MembershipUpdater, err error) {
 	var txn *sql.Tx
 	txn, err = d.db.Begin()
@@ -682,8 +689,7 @@ func (d *Database) MembershipUpdater(
 		}
 	}()
 
-	// TODO: Room version here
+	roomNID, err := d.assignRoomNID(ctx, txn, roomID, roomVersion)
-	roomNID, err := d.assignRoomNID(ctx, txn, roomID, "1")
 	if err != nil {
 		return nil, err
 	}

roomserver/types/types.go

@@ -140,6 +140,8 @@ type StateEntryList struct {
 // (On postgresql this wraps a database transaction that holds a "FOR UPDATE"
 //  lock on the row in the rooms table holding the latest events for the room.)
 type RoomRecentEventsUpdater interface {
+	// The room version of the room.
+	RoomVersion() gomatrixserverlib.RoomVersion
 	// The latest event IDs and state in the room.
 	LatestEvents() []StateAtEventAndReference
 	// The event ID of the latest event written to the output log in the room.

roomserver/version/version.go

@@ -43,12 +43,12 @@ var roomVersions = map[gomatrixserverlib.RoomVersion]RoomVersionDescription{
 		Stable:    true,
 	},
 	gomatrixserverlib.RoomVersionV3: RoomVersionDescription{
-		Supported: false,
+		Supported: true,
-		Stable:    false,
+		Stable:    true,
 	},
 	gomatrixserverlib.RoomVersionV4: RoomVersionDescription{
-		Supported: false,
+		Supported: true,
-		Stable:    false,
+		Stable:    true,
 	},
 	gomatrixserverlib.RoomVersionV5: RoomVersionDescription{
 		Supported: false,

sytest-blacklist

@@ -32,3 +32,6 @@ Alias creators can delete canonical alias with no ops
 # Blacklisted because we need to implement v2 invite endpoints for room versions
 # to be supported (currently fails with M_UNSUPPORTED_ROOM_VERSION) 
 Inbound federation rejects invites which are not signed by the sender
+
+# Blacklisted because we don't support ignores yet
+Ignore invite in incremental sync

sytest-whitelist

@@ -215,7 +215,6 @@ Guest users can sync from default guest_access rooms if joined
 Real non-joined users cannot room initalSync for non-world_readable rooms
 Push rules come down in an initial /sync
 Regular users can add and delete aliases in the default room configuration
-Regular users can add and delete aliases when m.room.aliases is restricted
 GET /r0/capabilities is not public
 GET /joined_rooms lists newly-created room
 /joined_rooms returns only joined rooms
@@ -225,9 +224,24 @@ Remote user can backfill in a room with version 1
 POST /createRoom creates a room with the given version
 POST /createRoom rejects attempts to create rooms with numeric versions
 POST /createRoom rejects attempts to create rooms with unknown versions
+Regular users can add and delete aliases when m.room.aliases is restricted
 User can create and send/receive messages in a room with version 2
 local user can join room with version 2
 remote user can join room with version 2
 User can invite local user to room with version 2
 Remote user can backfill in a room with version 2
 Inbound federation accepts attempts to join v2 rooms from servers with support
+Outbound federation can send invites via v2 API
+User can create and send/receive messages in a room with version 3
+local user can join room with version 3
+Remote user can backfill in a room with version 3
+User can create and send/receive messages in a room with version 4
+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