WIP: Add libp2p-go (#956)

* Add libp2p-go

* Some tweaks, tidying up

(cherry picked from commit 1a5bb121f8121c4f68a27abbf25a9a35a1b7c63e)

* Move p2p dockerfile

(cherry picked from commit 8d3bf44ea1bf37f950034e73bcdc315afdabe79a)

* Remove containsBackwardsExtremity

* Fix some linter errors, update some libp2p packages/calls, other tidying up

* Add -port for dendrite-p2p-demo

* Use instance name as key ID

* Remove P2P demo docker stuff, no longer needed now that we have SQLite

* Remove Dockerfile-p2p too

* Remove p2p logic from dendrite-monolith-server

* Inject publicRoomsDB in publicroomsapi

Inject publicRoomsDB instead of switching on base.libP2P.
See: https://github.com/matrix-org/dendrite/pull/956/files?file-filters%5B%5D=.go#r406276914

* Fix lint warning

* Extract mDNSListener from base.go

* Extract CreateFederationClient into demo

* Create P2PDendrite from BaseDendrite

Extract logic specific to P2PDendrite from base.go

* Set base.go to upstream/master

* Move pubsub to demo cmd

* Move PostgreswithDHT to cmd

* Remove unstable features

* Add copyrights

* Move libp2pvalidator into p2pdendrite

* Rename dendrite-p2p-demo -> dendrite-demo-libp2p

* Update copyrights

* go mod tidy

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>

cmd/dendrite-demo-libp2p/main.go

@@ -0,0 +1,203 @@
+// Copyright 2017 Vector Creations Ltd
+// Copyright 2018 New Vector Ltd
+// Copyright 2019-2020 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 main
+
+import (
+	"crypto/ed25519"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"time"
+
+	gostream "github.com/libp2p/go-libp2p-gostream"
+	p2phttp "github.com/libp2p/go-libp2p-http"
+	p2pdisc "github.com/libp2p/go-libp2p/p2p/discovery"
+	"github.com/matrix-org/dendrite/appservice"
+	"github.com/matrix-org/dendrite/clientapi"
+	"github.com/matrix-org/dendrite/clientapi/producers"
+	"github.com/matrix-org/dendrite/cmd/dendrite-demo-libp2p/storage"
+	"github.com/matrix-org/dendrite/common"
+	"github.com/matrix-org/dendrite/common/config"
+	"github.com/matrix-org/dendrite/common/keydb"
+	"github.com/matrix-org/dendrite/common/transactions"
+	"github.com/matrix-org/dendrite/eduserver"
+	"github.com/matrix-org/dendrite/federationapi"
+	"github.com/matrix-org/dendrite/federationsender"
+	"github.com/matrix-org/dendrite/mediaapi"
+	"github.com/matrix-org/dendrite/publicroomsapi"
+	"github.com/matrix-org/dendrite/roomserver"
+	"github.com/matrix-org/dendrite/syncapi"
+	"github.com/matrix-org/gomatrixserverlib"
+
+	"github.com/matrix-org/dendrite/eduserver/cache"
+
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+	"github.com/sirupsen/logrus"
+)
+
+func createKeyDB(
+	base *P2PDendrite,
+) keydb.Database {
+	db, err := keydb.NewDatabase(
+		string(base.Base.Cfg.Database.ServerKey),
+		base.Base.Cfg.Matrix.ServerName,
+		base.Base.Cfg.Matrix.PrivateKey.Public().(ed25519.PublicKey),
+		base.Base.Cfg.Matrix.KeyID,
+	)
+	if err != nil {
+		logrus.WithError(err).Panicf("failed to connect to keys db")
+	}
+	mdns := mDNSListener{
+		host:  base.LibP2P,
+		keydb: db,
+	}
+	serv, err := p2pdisc.NewMdnsService(
+		base.LibP2PContext,
+		base.LibP2P,
+		time.Second*10,
+		"_matrix-dendrite-p2p._tcp",
+	)
+	if err != nil {
+		panic(err)
+	}
+	serv.RegisterNotifee(&mdns)
+	return db
+}
+
+func createFederationClient(
+	base *P2PDendrite,
+) *gomatrixserverlib.FederationClient {
+	fmt.Println("Running in libp2p federation mode")
+	fmt.Println("Warning: Federation with non-libp2p homeservers will not work in this mode yet!")
+	tr := &http.Transport{}
+	tr.RegisterProtocol(
+		"matrix",
+		p2phttp.NewTransport(base.LibP2P, p2phttp.ProtocolOption("/matrix")),
+	)
+	return gomatrixserverlib.NewFederationClientWithTransport(
+		base.Base.Cfg.Matrix.ServerName, base.Base.Cfg.Matrix.KeyID, base.Base.Cfg.Matrix.PrivateKey, tr,
+	)
+}
+
+func main() {
+	instanceName := flag.String("name", "dendrite-p2p", "the name of this P2P demo instance")
+	instancePort := flag.Int("port", 8080, "the port that the client API will listen on")
+	flag.Parse()
+
+	filename := fmt.Sprintf("%s-private.key", *instanceName)
+	_, err := os.Stat(filename)
+	var privKey ed25519.PrivateKey
+	if os.IsNotExist(err) {
+		_, privKey, _ = ed25519.GenerateKey(nil)
+		if err = ioutil.WriteFile(filename, privKey, 0600); err != nil {
+			fmt.Printf("Couldn't write private key to file '%s': %s\n", filename, err)
+		}
+	} else {
+		privKey, err = ioutil.ReadFile(filename)
+		if err != nil {
+			fmt.Printf("Couldn't read private key from file '%s': %s\n", filename, err)
+			_, privKey, _ = ed25519.GenerateKey(nil)
+		}
+	}
+
+	cfg := config.Dendrite{}
+	cfg.Matrix.ServerName = "p2p"
+	cfg.Matrix.PrivateKey = privKey
+	cfg.Matrix.KeyID = gomatrixserverlib.KeyID(fmt.Sprintf("ed25519:%s", *instanceName))
+	cfg.Kafka.UseNaffka = true
+	cfg.Kafka.Topics.OutputRoomEvent = "roomserverOutput"
+	cfg.Kafka.Topics.OutputClientData = "clientapiOutput"
+	cfg.Kafka.Topics.OutputTypingEvent = "typingServerOutput"
+	cfg.Kafka.Topics.UserUpdates = "userUpdates"
+	cfg.Database.Account = config.DataSource(fmt.Sprintf("file:%s-account.db", *instanceName))
+	cfg.Database.Device = config.DataSource(fmt.Sprintf("file:%s-device.db", *instanceName))
+	cfg.Database.MediaAPI = config.DataSource(fmt.Sprintf("file:%s-mediaapi.db", *instanceName))
+	cfg.Database.SyncAPI = config.DataSource(fmt.Sprintf("file:%s-syncapi.db", *instanceName))
+	cfg.Database.RoomServer = config.DataSource(fmt.Sprintf("file:%s-roomserver.db", *instanceName))
+	cfg.Database.ServerKey = config.DataSource(fmt.Sprintf("file:%s-serverkey.db", *instanceName))
+	cfg.Database.FederationSender = config.DataSource(fmt.Sprintf("file:%s-federationsender.db", *instanceName))
+	cfg.Database.AppService = config.DataSource(fmt.Sprintf("file:%s-appservice.db", *instanceName))
+	cfg.Database.PublicRoomsAPI = config.DataSource(fmt.Sprintf("file:%s-publicroomsa.db", *instanceName))
+	cfg.Database.Naffka = config.DataSource(fmt.Sprintf("file:%s-naffka.db", *instanceName))
+	if err = cfg.Derive(); err != nil {
+		panic(err)
+	}
+
+	base := NewP2PDendrite(&cfg, "Monolith")
+	defer base.Base.Close() // nolint: errcheck
+
+	accountDB := base.Base.CreateAccountsDB()
+	deviceDB := base.Base.CreateDeviceDB()
+	keyDB := createKeyDB(base)
+	federation := createFederationClient(base)
+	keyRing := keydb.CreateKeyRing(federation.Client, keyDB)
+
+	alias, input, query := roomserver.SetupRoomServerComponent(&base.Base)
+	eduInputAPI := eduserver.SetupEDUServerComponent(&base.Base, cache.New())
+	asQuery := appservice.SetupAppServiceAPIComponent(
+		&base.Base, accountDB, deviceDB, federation, alias, query, transactions.New(),
+	)
+	fedSenderAPI := federationsender.SetupFederationSenderComponent(&base.Base, federation, query)
+
+	clientapi.SetupClientAPIComponent(
+		&base.Base, deviceDB, accountDB,
+		federation, &keyRing, alias, input, query,
+		eduInputAPI, asQuery, transactions.New(), fedSenderAPI,
+	)
+	eduProducer := producers.NewEDUServerProducer(eduInputAPI)
+	federationapi.SetupFederationAPIComponent(&base.Base, accountDB, deviceDB, federation, &keyRing, alias, input, query, asQuery, fedSenderAPI, eduProducer)
+	mediaapi.SetupMediaAPIComponent(&base.Base, deviceDB)
+	publicRoomsDB, err := storage.NewPublicRoomsServerDatabaseWithPubSub(string(base.Base.Cfg.Database.PublicRoomsAPI), base.LibP2PPubsub)
+	if err != nil {
+		logrus.WithError(err).Panicf("failed to connect to public rooms db")
+	}
+	publicroomsapi.SetupPublicRoomsAPIComponent(&base.Base, deviceDB, publicRoomsDB, query, federation, nil) // Check this later
+	syncapi.SetupSyncAPIComponent(&base.Base, deviceDB, accountDB, query, federation, &cfg)
+
+	httpHandler := common.WrapHandlerInCORS(base.Base.APIMux)
+
+	// Set up the API endpoints we handle. /metrics is for prometheus, and is
+	// not wrapped by CORS, while everything else is
+	http.Handle("/metrics", promhttp.Handler())
+	http.Handle("/", httpHandler)
+
+	// Expose the matrix APIs directly rather than putting them under a /api path.
+	go func() {
+		httpBindAddr := fmt.Sprintf(":%d", *instancePort)
+		logrus.Info("Listening on ", httpBindAddr)
+		logrus.Fatal(http.ListenAndServe(httpBindAddr, nil))
+	}()
+	// Expose the matrix APIs also via libp2p
+	if base.LibP2P != nil {
+		go func() {
+			logrus.Info("Listening on libp2p host ID ", base.LibP2P.ID())
+			listener, err := gostream.Listen(base.LibP2P, "/matrix")
+			if err != nil {
+				panic(err)
+			}
+			defer func() {
+				logrus.Fatal(listener.Close())
+			}()
+			logrus.Fatal(http.Serve(listener, nil))
+		}()
+	}
+
+	// We want to block forever to let the HTTP and HTTPS handler serve the APIs
+	select {}
+}

cmd/dendrite-demo-libp2p/mdnslistener.go

@@ -0,0 +1,63 @@
+// Copyright 2020 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 main
+
+import (
+	"context"
+	"fmt"
+	"math"
+
+	"github.com/libp2p/go-libp2p-core/host"
+	"github.com/libp2p/go-libp2p-core/peer"
+	"github.com/matrix-org/dendrite/common/keydb"
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+type mDNSListener struct {
+	keydb keydb.Database
+	host  host.Host
+}
+
+func (n *mDNSListener) HandlePeerFound(p peer.AddrInfo) {
+	if err := n.host.Connect(context.Background(), p); err != nil {
+		fmt.Println("Error adding peer", p.ID.String(), "via mDNS:", err)
+	}
+	if pubkey, err := p.ID.ExtractPublicKey(); err == nil {
+		raw, _ := pubkey.Raw()
+		if err := n.keydb.StoreKeys(
+			context.Background(),
+			map[gomatrixserverlib.PublicKeyLookupRequest]gomatrixserverlib.PublicKeyLookupResult{
+				{
+					ServerName: gomatrixserverlib.ServerName(p.ID.String()),
+					KeyID:      "ed25519:p2pdemo",
+				}: {
+					VerifyKey: gomatrixserverlib.VerifyKey{
+						Key: gomatrixserverlib.Base64String(raw),
+					},
+					ValidUntilTS: math.MaxUint64 >> 1,
+					ExpiredTS:    gomatrixserverlib.PublicKeyNotExpired,
+				},
+			},
+		); err != nil {
+			fmt.Println("Failed to store keys:", err)
+		}
+	}
+	fmt.Println("Discovered", len(n.host.Peerstore().Peers())-1, "other libp2p peer(s):")
+	for _, peer := range n.host.Peerstore().Peers() {
+		if peer != n.host.ID() {
+			fmt.Println("-", peer)
+		}
+	}
+}

cmd/dendrite-demo-libp2p/p2pdendrite.go

@@ -0,0 +1,126 @@
+// Copyright 2020 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 main
+
+import (
+	"context"
+	"fmt"
+
+	"errors"
+
+	pstore "github.com/libp2p/go-libp2p-core/peerstore"
+	record "github.com/libp2p/go-libp2p-record"
+	"github.com/matrix-org/dendrite/common/basecomponent"
+
+	"github.com/libp2p/go-libp2p"
+	circuit "github.com/libp2p/go-libp2p-circuit"
+	crypto "github.com/libp2p/go-libp2p-core/crypto"
+	routing "github.com/libp2p/go-libp2p-core/routing"
+
+	host "github.com/libp2p/go-libp2p-core/host"
+	dht "github.com/libp2p/go-libp2p-kad-dht"
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
+	"github.com/matrix-org/gomatrixserverlib"
+
+	"github.com/matrix-org/dendrite/common/config"
+)
+
+// P2PDendrite is a Peer-to-Peer variant of BaseDendrite.
+type P2PDendrite struct {
+	Base basecomponent.BaseDendrite
+
+	// Store our libp2p object so that we can make outgoing connections from it
+	// later
+	LibP2P        host.Host
+	LibP2PContext context.Context
+	LibP2PCancel  context.CancelFunc
+	LibP2PDHT     *dht.IpfsDHT
+	LibP2PPubsub  *pubsub.PubSub
+}
+
+// NewP2PDendrite creates a new instance to be used by a component.
+// The componentName is used for logging purposes, and should be a friendly name
+// of the component running, e.g. SyncAPI.
+func NewP2PDendrite(cfg *config.Dendrite, componentName string) *P2PDendrite {
+	baseDendrite := basecomponent.NewBaseDendrite(cfg, componentName)
+
+	ctx, cancel := context.WithCancel(context.Background())
+
+	privKey, err := crypto.UnmarshalEd25519PrivateKey(cfg.Matrix.PrivateKey[:])
+	if err != nil {
+		panic(err)
+	}
+
+	//defaultIP6ListenAddr, _ := multiaddr.NewMultiaddr("/ip6/::/tcp/0")
+	var libp2pdht *dht.IpfsDHT
+	libp2p, err := libp2p.New(ctx,
+		libp2p.Identity(privKey),
+		libp2p.DefaultListenAddrs,
+		//libp2p.ListenAddrs(defaultIP6ListenAddr),
+		libp2p.DefaultTransports,
+		libp2p.Routing(func(h host.Host) (r routing.PeerRouting, err error) {
+			libp2pdht, err = dht.New(ctx, h)
+			if err != nil {
+				return nil, err
+			}
+			libp2pdht.Validator = libP2PValidator{}
+			r = libp2pdht
+			return
+		}),
+		libp2p.EnableAutoRelay(),
+		libp2p.EnableRelay(circuit.OptHop),
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	libp2ppubsub, err := pubsub.NewFloodSub(context.Background(), libp2p, []pubsub.Option{
+		pubsub.WithMessageSigning(true),
+	}...)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println("Our public key:", privKey.GetPublic())
+	fmt.Println("Our node ID:", libp2p.ID())
+	fmt.Println("Our addresses:", libp2p.Addrs())
+
+	cfg.Matrix.ServerName = gomatrixserverlib.ServerName(libp2p.ID().String())
+
+	return &P2PDendrite{
+		Base:          *baseDendrite,
+		LibP2P:        libp2p,
+		LibP2PContext: ctx,
+		LibP2PCancel:  cancel,
+		LibP2PDHT:     libp2pdht,
+		LibP2PPubsub:  libp2ppubsub,
+	}
+}
+
+type libP2PValidator struct {
+	KeyBook pstore.KeyBook
+}
+
+func (v libP2PValidator) Validate(key string, value []byte) error {
+	ns, _, err := record.SplitKey(key)
+	if err != nil || ns != "matrix" {
+		return errors.New("not Matrix path")
+	}
+	return nil
+}
+
+func (v libP2PValidator) Select(k string, vals [][]byte) (int, error) {
+	return 0, nil
+}

cmd/dendrite-demo-libp2p/storage/postgreswithdht/storage.go

@@ -0,0 +1,164 @@
+// Copyright 2020 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 postgreswithdht
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/matrix-org/dendrite/publicroomsapi/storage/postgres"
+	"github.com/matrix-org/gomatrixserverlib"
+
+	dht "github.com/libp2p/go-libp2p-kad-dht"
+)
+
+const DHTInterval = time.Second * 10
+
+// PublicRoomsServerDatabase represents a public rooms server database.
+type PublicRoomsServerDatabase struct {
+	dht *dht.IpfsDHT
+	postgres.PublicRoomsServerDatabase
+	ourRoomsContext  context.Context                         // our current value in the DHT
+	ourRoomsCancel   context.CancelFunc                      // cancel when we want to expire our value
+	foundRooms       map[string]gomatrixserverlib.PublicRoom // additional rooms we have learned about from the DHT
+	foundRoomsMutex  sync.RWMutex                            // protects foundRooms
+	maintenanceTimer *time.Timer                             //
+	roomsAdvertised  atomic.Value                            // stores int
+	roomsDiscovered  atomic.Value                            // stores int
+}
+
+// NewPublicRoomsServerDatabase creates a new public rooms server database.
+func NewPublicRoomsServerDatabase(dataSourceName string, dht *dht.IpfsDHT) (*PublicRoomsServerDatabase, error) {
+	pg, err := postgres.NewPublicRoomsServerDatabase(dataSourceName)
+	if err != nil {
+		return nil, err
+	}
+	provider := PublicRoomsServerDatabase{
+		dht:                       dht,
+		PublicRoomsServerDatabase: *pg,
+	}
+	go provider.ResetDHTMaintenance()
+	provider.roomsAdvertised.Store(0)
+	provider.roomsDiscovered.Store(0)
+	return &provider, nil
+}
+
+func (d *PublicRoomsServerDatabase) GetRoomVisibility(ctx context.Context, roomID string) (bool, error) {
+	return d.PublicRoomsServerDatabase.GetRoomVisibility(ctx, roomID)
+}
+
+func (d *PublicRoomsServerDatabase) SetRoomVisibility(ctx context.Context, visible bool, roomID string) error {
+	d.ResetDHTMaintenance()
+	return d.PublicRoomsServerDatabase.SetRoomVisibility(ctx, visible, roomID)
+}
+
+func (d *PublicRoomsServerDatabase) CountPublicRooms(ctx context.Context) (int64, error) {
+	count, err := d.PublicRoomsServerDatabase.CountPublicRooms(ctx)
+	if err != nil {
+		return 0, err
+	}
+	d.foundRoomsMutex.RLock()
+	defer d.foundRoomsMutex.RUnlock()
+	return count + int64(len(d.foundRooms)), nil
+}
+
+func (d *PublicRoomsServerDatabase) GetPublicRooms(ctx context.Context, offset int64, limit int16, filter string) ([]gomatrixserverlib.PublicRoom, error) {
+	realfilter := filter
+	if realfilter == "__local__" {
+		realfilter = ""
+	}
+	rooms, err := d.PublicRoomsServerDatabase.GetPublicRooms(ctx, offset, limit, realfilter)
+	if err != nil {
+		return []gomatrixserverlib.PublicRoom{}, err
+	}
+	if filter != "__local__" {
+		d.foundRoomsMutex.RLock()
+		defer d.foundRoomsMutex.RUnlock()
+		for _, room := range d.foundRooms {
+			rooms = append(rooms, room)
+		}
+	}
+	return rooms, nil
+}
+
+func (d *PublicRoomsServerDatabase) UpdateRoomFromEvents(ctx context.Context, eventsToAdd []gomatrixserverlib.Event, eventsToRemove []gomatrixserverlib.Event) error {
+	return d.PublicRoomsServerDatabase.UpdateRoomFromEvents(ctx, eventsToAdd, eventsToRemove)
+}
+
+func (d *PublicRoomsServerDatabase) UpdateRoomFromEvent(ctx context.Context, event gomatrixserverlib.Event) error {
+	return d.PublicRoomsServerDatabase.UpdateRoomFromEvent(ctx, event)
+}
+
+func (d *PublicRoomsServerDatabase) ResetDHTMaintenance() {
+	if d.maintenanceTimer != nil && !d.maintenanceTimer.Stop() {
+		<-d.maintenanceTimer.C
+	}
+	d.Interval()
+}
+
+func (d *PublicRoomsServerDatabase) Interval() {
+	if err := d.AdvertiseRoomsIntoDHT(); err != nil {
+		//	fmt.Println("Failed to advertise room in DHT:", err)
+	}
+	if err := d.FindRoomsInDHT(); err != nil {
+		//	fmt.Println("Failed to find rooms in DHT:", err)
+	}
+	fmt.Println("Found", d.roomsDiscovered.Load(), "room(s), advertised", d.roomsAdvertised.Load(), "room(s)")
+	d.maintenanceTimer = time.AfterFunc(DHTInterval, d.Interval)
+}
+
+func (d *PublicRoomsServerDatabase) AdvertiseRoomsIntoDHT() error {
+	dbCtx, dbCancel := context.WithTimeout(context.Background(), 3*time.Second)
+	_ = dbCancel
+	ourRooms, err := d.GetPublicRooms(dbCtx, 0, 1024, "__local__")
+	if err != nil {
+		return err
+	}
+	if j, err := json.Marshal(ourRooms); err == nil {
+		d.roomsAdvertised.Store(len(ourRooms))
+		d.ourRoomsContext, d.ourRoomsCancel = context.WithCancel(context.Background())
+		if err := d.dht.PutValue(d.ourRoomsContext, "/matrix/publicRooms", j); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (d *PublicRoomsServerDatabase) FindRoomsInDHT() error {
+	d.foundRoomsMutex.Lock()
+	searchCtx, searchCancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer searchCancel()
+	defer d.foundRoomsMutex.Unlock()
+	results, err := d.dht.GetValues(searchCtx, "/matrix/publicRooms", 1024)
+	if err != nil {
+		return err
+	}
+	d.foundRooms = make(map[string]gomatrixserverlib.PublicRoom)
+	for _, result := range results {
+		var received []gomatrixserverlib.PublicRoom
+		if err := json.Unmarshal(result.Val, &received); err != nil {
+			return err
+		}
+		for _, room := range received {
+			d.foundRooms[room.RoomID] = room
+		}
+	}
+	d.roomsDiscovered.Store(len(d.foundRooms))
+	return nil
+}

cmd/dendrite-demo-libp2p/storage/postgreswithpubsub/storage.go

@@ -0,0 +1,179 @@
+// Copyright 2020 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 postgreswithpubsub
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"sync"
+	"sync/atomic"
+	"time"
+
+	"github.com/matrix-org/dendrite/publicroomsapi/storage/postgres"
+	"github.com/matrix-org/gomatrixserverlib"
+
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
+)
+
+const MaintenanceInterval = time.Second * 10
+
+type discoveredRoom struct {
+	time time.Time
+	room gomatrixserverlib.PublicRoom
+}
+
+// PublicRoomsServerDatabase represents a public rooms server database.
+type PublicRoomsServerDatabase struct {
+	postgres.PublicRoomsServerDatabase                           //
+	pubsub                             *pubsub.PubSub            //
+	subscription                       *pubsub.Subscription      //
+	foundRooms                         map[string]discoveredRoom // additional rooms we have learned about from the DHT
+	foundRoomsMutex                    sync.RWMutex              // protects foundRooms
+	maintenanceTimer                   *time.Timer               //
+	roomsAdvertised                    atomic.Value              // stores int
+}
+
+// NewPublicRoomsServerDatabase creates a new public rooms server database.
+func NewPublicRoomsServerDatabase(dataSourceName string, pubsub *pubsub.PubSub) (*PublicRoomsServerDatabase, error) {
+	pg, err := postgres.NewPublicRoomsServerDatabase(dataSourceName)
+	if err != nil {
+		return nil, err
+	}
+	provider := PublicRoomsServerDatabase{
+		pubsub:                    pubsub,
+		PublicRoomsServerDatabase: *pg,
+		foundRooms:                make(map[string]discoveredRoom),
+	}
+	if topic, err := pubsub.Join("/matrix/publicRooms"); err != nil {
+		return nil, err
+	} else if sub, err := topic.Subscribe(); err == nil {
+		provider.subscription = sub
+		go provider.MaintenanceTimer()
+		go provider.FindRooms()
+		provider.roomsAdvertised.Store(0)
+		return &provider, nil
+	} else {
+		return nil, err
+	}
+}
+
+func (d *PublicRoomsServerDatabase) GetRoomVisibility(ctx context.Context, roomID string) (bool, error) {
+	return d.PublicRoomsServerDatabase.GetRoomVisibility(ctx, roomID)
+}
+
+func (d *PublicRoomsServerDatabase) SetRoomVisibility(ctx context.Context, visible bool, roomID string) error {
+	d.MaintenanceTimer()
+	return d.PublicRoomsServerDatabase.SetRoomVisibility(ctx, visible, roomID)
+}
+
+func (d *PublicRoomsServerDatabase) CountPublicRooms(ctx context.Context) (int64, error) {
+	d.foundRoomsMutex.RLock()
+	defer d.foundRoomsMutex.RUnlock()
+	return int64(len(d.foundRooms)), nil
+}
+
+func (d *PublicRoomsServerDatabase) GetPublicRooms(ctx context.Context, offset int64, limit int16, filter string) ([]gomatrixserverlib.PublicRoom, error) {
+	var rooms []gomatrixserverlib.PublicRoom
+	if filter == "__local__" {
+		if r, err := d.PublicRoomsServerDatabase.GetPublicRooms(ctx, offset, limit, ""); err == nil {
+			rooms = append(rooms, r...)
+		} else {
+			return []gomatrixserverlib.PublicRoom{}, err
+		}
+	} else {
+		d.foundRoomsMutex.RLock()
+		defer d.foundRoomsMutex.RUnlock()
+		for _, room := range d.foundRooms {
+			rooms = append(rooms, room.room)
+		}
+	}
+	return rooms, nil
+}
+
+func (d *PublicRoomsServerDatabase) UpdateRoomFromEvents(ctx context.Context, eventsToAdd []gomatrixserverlib.Event, eventsToRemove []gomatrixserverlib.Event) error {
+	return d.PublicRoomsServerDatabase.UpdateRoomFromEvents(ctx, eventsToAdd, eventsToRemove)
+}
+
+func (d *PublicRoomsServerDatabase) UpdateRoomFromEvent(ctx context.Context, event gomatrixserverlib.Event) error {
+	return d.PublicRoomsServerDatabase.UpdateRoomFromEvent(ctx, event)
+}
+
+func (d *PublicRoomsServerDatabase) MaintenanceTimer() {
+	if d.maintenanceTimer != nil && !d.maintenanceTimer.Stop() {
+		<-d.maintenanceTimer.C
+	}
+	d.Interval()
+}
+
+func (d *PublicRoomsServerDatabase) Interval() {
+	d.foundRoomsMutex.Lock()
+	for k, v := range d.foundRooms {
+		if time.Since(v.time) > time.Minute {
+			delete(d.foundRooms, k)
+		}
+	}
+	d.foundRoomsMutex.Unlock()
+	if err := d.AdvertiseRooms(); err != nil {
+		fmt.Println("Failed to advertise room in DHT:", err)
+	}
+	d.foundRoomsMutex.RLock()
+	defer d.foundRoomsMutex.RUnlock()
+	fmt.Println("Found", len(d.foundRooms), "room(s), advertised", d.roomsAdvertised.Load(), "room(s)")
+	d.maintenanceTimer = time.AfterFunc(MaintenanceInterval, d.Interval)
+}
+
+func (d *PublicRoomsServerDatabase) AdvertiseRooms() error {
+	dbCtx, dbCancel := context.WithTimeout(context.Background(), 3*time.Second)
+	_ = dbCancel
+	ourRooms, err := d.GetPublicRooms(dbCtx, 0, 1024, "__local__")
+	if err != nil {
+		return err
+	}
+	advertised := 0
+	for _, room := range ourRooms {
+		if j, err := json.Marshal(room); err == nil {
+			if topic, err := d.pubsub.Join("/matrix/publicRooms"); err != nil {
+				fmt.Println("Failed to subscribe to topic:", err)
+			} else if err := topic.Publish(context.TODO(), j); err != nil {
+				fmt.Println("Failed to publish public room:", err)
+			} else {
+				advertised++
+			}
+		}
+	}
+
+	d.roomsAdvertised.Store(advertised)
+	return nil
+}
+
+func (d *PublicRoomsServerDatabase) FindRooms() {
+	for {
+		msg, err := d.subscription.Next(context.Background())
+		if err != nil {
+			continue
+		}
+		received := discoveredRoom{
+			time: time.Now(),
+		}
+		if err := json.Unmarshal(msg.Data, &received.room); err != nil {
+			fmt.Println("Unmarshal error:", err)
+			continue
+		}
+		d.foundRoomsMutex.Lock()
+		d.foundRooms[received.room.RoomID] = received
+		d.foundRoomsMutex.Unlock()
+	}
+}

cmd/dendrite-demo-libp2p/storage/storage.go

@@ -0,0 +1,61 @@
+// Copyright 2020 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 storage
+
+import (
+	"net/url"
+
+	dht "github.com/libp2p/go-libp2p-kad-dht"
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
+	"github.com/matrix-org/dendrite/cmd/dendrite-demo-libp2p/storage/postgreswithdht"
+	"github.com/matrix-org/dendrite/cmd/dendrite-demo-libp2p/storage/postgreswithpubsub"
+	"github.com/matrix-org/dendrite/publicroomsapi/storage"
+	"github.com/matrix-org/dendrite/publicroomsapi/storage/sqlite3"
+)
+
+const schemePostgres = "postgres"
+const schemeFile = "file"
+
+// NewPublicRoomsServerDatabase opens a database connection.
+func NewPublicRoomsServerDatabaseWithDHT(dataSourceName string, dht *dht.IpfsDHT) (storage.Database, error) {
+	uri, err := url.Parse(dataSourceName)
+	if err != nil {
+		return postgreswithdht.NewPublicRoomsServerDatabase(dataSourceName, dht)
+	}
+	switch uri.Scheme {
+	case schemePostgres:
+		return postgreswithdht.NewPublicRoomsServerDatabase(dataSourceName, dht)
+	case schemeFile:
+		return sqlite3.NewPublicRoomsServerDatabase(dataSourceName)
+	default:
+		return postgreswithdht.NewPublicRoomsServerDatabase(dataSourceName, dht)
+	}
+}
+
+// NewPublicRoomsServerDatabase opens a database connection.
+func NewPublicRoomsServerDatabaseWithPubSub(dataSourceName string, pubsub *pubsub.PubSub) (storage.Database, error) {
+	uri, err := url.Parse(dataSourceName)
+	if err != nil {
+		return postgreswithpubsub.NewPublicRoomsServerDatabase(dataSourceName, pubsub)
+	}
+	switch uri.Scheme {
+	case schemePostgres:
+		return postgreswithpubsub.NewPublicRoomsServerDatabase(dataSourceName, pubsub)
+	case schemeFile:
+		return sqlite3.NewPublicRoomsServerDatabase(dataSourceName)
+	default:
+		return postgreswithpubsub.NewPublicRoomsServerDatabase(dataSourceName, pubsub)
+	}
+}

cmd/dendrite-monolith-server/main.go

@@ -31,6 +31,7 @@ import (
 	"github.com/matrix-org/dendrite/federationsender"
 	"github.com/matrix-org/dendrite/mediaapi"
 	"github.com/matrix-org/dendrite/publicroomsapi"
+	"github.com/matrix-org/dendrite/publicroomsapi/storage"
 	"github.com/matrix-org/dendrite/roomserver"
 	"github.com/matrix-org/dendrite/syncapi"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
@@ -71,7 +72,11 @@ func main() {
 	eduProducer := producers.NewEDUServerProducer(eduInputAPI)
 	federationapi.SetupFederationAPIComponent(base, accountDB, deviceDB, federation, &keyRing, alias, input, query, asQuery, fedSenderAPI, eduProducer)
 	mediaapi.SetupMediaAPIComponent(base, deviceDB)
-	publicroomsapi.SetupPublicRoomsAPIComponent(base, deviceDB, query, federation, nil)
+	publicRoomsDB, err := storage.NewPublicRoomsServerDatabase(string(base.Cfg.Database.PublicRoomsAPI))
+	if err != nil {
+		logrus.WithError(err).Panicf("failed to connect to public rooms db")
+	}
+	publicroomsapi.SetupPublicRoomsAPIComponent(base, deviceDB, publicRoomsDB, query, federation, nil)
 	syncapi.SetupSyncAPIComponent(base, deviceDB, accountDB, query, federation, cfg)
 
 	httpHandler := common.WrapHandlerInCORS(base.APIMux)

cmd/dendrite-public-rooms-api-server/main.go

@@ -17,6 +17,8 @@ package main
 import (
 	"github.com/matrix-org/dendrite/common/basecomponent"
 	"github.com/matrix-org/dendrite/publicroomsapi"
+	"github.com/matrix-org/dendrite/publicroomsapi/storage"
+	"github.com/sirupsen/logrus"
 )
 
 func main() {
@@ -27,8 +29,11 @@ func main() {
 	deviceDB := base.CreateDeviceDB()
 
 	_, _, query := base.CreateHTTPRoomserverAPIs()
-
+	publicRoomsDB, err := storage.NewPublicRoomsServerDatabase(string(base.Cfg.Database.PublicRoomsAPI))
-	publicroomsapi.SetupPublicRoomsAPIComponent(base, deviceDB, query, nil, nil)
+	if err != nil {
+		logrus.WithError(err).Panicf("failed to connect to public rooms db")
+	}
+	publicroomsapi.SetupPublicRoomsAPIComponent(base, deviceDB, publicRoomsDB, query, nil, nil)
 
 	base.SetupAndServeHTTP(string(base.Cfg.Bind.PublicRoomsAPI), string(base.Cfg.Listen.PublicRoomsAPI))
 

cmd/dendritejs/main.go

@@ -34,6 +34,7 @@ import (
 	"github.com/matrix-org/dendrite/federationsender"
 	"github.com/matrix-org/dendrite/mediaapi"
 	"github.com/matrix-org/dendrite/publicroomsapi"
+	"github.com/matrix-org/dendrite/publicroomsapi/storage"
 	"github.com/matrix-org/dendrite/roomserver"
 	"github.com/matrix-org/dendrite/syncapi"
 	"github.com/matrix-org/go-http-js-libp2p/go_http_js_libp2p"
@@ -137,7 +138,11 @@ func main() {
 	eduProducer := producers.NewEDUServerProducer(eduInputAPI)
 	federationapi.SetupFederationAPIComponent(base, accountDB, deviceDB, federation, &keyRing, alias, input, query, asQuery, fedSenderAPI, eduProducer)
 	mediaapi.SetupMediaAPIComponent(base, deviceDB)
-	publicroomsapi.SetupPublicRoomsAPIComponent(base, deviceDB, query, federation, p2pPublicRoomProvider)
+	publicRoomsDB, err := storage.NewPublicRoomsServerDatabase(string(base.Cfg.Database.PublicRoomsAPI))
+	if err != nil {
+		logrus.WithError(err).Panicf("failed to connect to public rooms db")
+	}
+	publicroomsapi.SetupPublicRoomsAPIComponent(base, deviceDB, publicRoomsDB, query, federation, p2pPublicRoomProvider)
 	syncapi.SetupSyncAPIComponent(base, deviceDB, accountDB, query, federation, cfg)
 
 	httpHandler := common.WrapHandlerInCORS(base.APIMux)

go.mod

@@ -3,8 +3,16 @@ module github.com/matrix-org/dendrite
 require (
 	github.com/gorilla/mux v1.7.3
 	github.com/hashicorp/golang-lru v0.5.4
+	github.com/kr/pretty v0.2.0 // indirect
 	github.com/lib/pq v1.2.0
+	github.com/libp2p/go-libp2p v0.6.0
+	github.com/libp2p/go-libp2p-circuit v0.1.4
 	github.com/libp2p/go-libp2p-core v0.5.0
+	github.com/libp2p/go-libp2p-gostream v0.2.1
+	github.com/libp2p/go-libp2p-http v0.1.5
+	github.com/libp2p/go-libp2p-kad-dht v0.5.0
+	github.com/libp2p/go-libp2p-pubsub v0.2.5
+	github.com/libp2p/go-libp2p-record v0.1.2
 	github.com/matrix-org/dugong v0.0.0-20171220115018-ea0a4690a0d5
 	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
@@ -12,10 +20,11 @@ require (
 	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
+	github.com/mattn/go-sqlite3 v2.0.3+incompatible
 	github.com/nfnt/resize v0.0.0-20160724205520-891127d8d1b5
 	github.com/opentracing/opentracing-go v1.1.0
-	github.com/pkg/errors v0.8.1
+	github.com/pierrec/lz4 v2.5.0+incompatible // indirect
+	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.4.1
 	github.com/rcrowley/go-metrics v0.0.0-20200313005456-10cdbea86bc0 // indirect
 	github.com/sirupsen/logrus v1.4.2
@@ -24,11 +33,11 @@ require (
 	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
-	golang.org/x/crypto v0.0.0-20200115085410-6d4e4cb37c7d
+	golang.org/x/crypto v0.0.0-20200221231518-2aa609cf4a9d
 	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
+	gopkg.in/yaml.v2 v2.2.8
 )
 
 go 1.13

go.sum

@@ -1,8 +1,11 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/AndreasBriese/bbloom v0.0.0-20180913140656-343706a395b7/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
+github.com/AndreasBriese/bbloom v0.0.0-20190306092124-e2d15f34fcf9/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/DataDog/zstd v1.4.4 h1:+IawcoXhCBylN7ccwdwf8LOH2jKq7NavGpEPanrlTzE=
 github.com/DataDog/zstd v1.4.4/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
+github.com/Kubuxu/go-os-helper v0.0.1/go.mod h1:N8B+I7vPCT80IcP58r50u4+gEEcsZETFUpAzWW2ep1Y=
 github.com/Shopify/toxiproxy v2.1.4+incompatible h1:TKdv8HiTLgE5wdJuEML90aBgNWsokNbMijUGhmcoBJc=
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
@@ -10,13 +13,18 @@ github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuy
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
+github.com/btcsuite/btcd v0.0.0-20190213025234-306aecffea32/go.mod h1:DrZx5ec/dmnfpw9KyYoQyYo7d0KEvTkk/5M/vbZjAr8=
+github.com/btcsuite/btcd v0.0.0-20190523000118-16327141da8c/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
+github.com/btcsuite/btcd v0.0.0-20190824003749-130ea5bddde3/go.mod h1:3J08xEfcugPacsc34/LKRU2yO7YmuT8yt28J8k2+rrI=
 github.com/btcsuite/btcd v0.20.1-beta h1:Ik4hyJqN8Jfyv3S4AGBOmyouMsYE3EdYODkMbQjwPGw=
 github.com/btcsuite/btcd v0.20.1-beta/go.mod h1:wVuoA8VJLEcwgqHBwHmzLRazpKxTv13Px/pDuV7OomQ=
 github.com/btcsuite/btclog v0.0.0-20170628155309-84c8d2346e9f/go.mod h1:TdznJufoqS23FtqVCzL0ZqgP5MqXbb4fg/WgDys70nA=
+github.com/btcsuite/btcutil v0.0.0-20190207003914-4c204d697803/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
 github.com/btcsuite/btcutil v0.0.0-20190425235716-9e5f4b9a998d/go.mod h1:+5NJ2+qvTyV9exUAL/rxXi3DcLg2Ts+ymUAY5y4NvMg=
 github.com/btcsuite/btcutil v1.0.1 h1:GKOz8BnRjYrb/JTKgaOk+zh26NWNdSNvdvv0xoAZMSA=
 github.com/btcsuite/btcutil v1.0.1/go.mod h1:j9HUFwoQRsZL3V4n+qG+CUnEGHOarIxfC3Le2Yhbcts=
@@ -31,13 +39,28 @@ github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd h1:qMd81Ts1T2OTKmB4acZcyKaMtRnY5Y44NuXGX2GFJ1w=
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
+github.com/coreos/etcd v3.3.10+incompatible/go.mod h1:uF7uidLiAD3TWHmW31ZFd/JWoc32PjwdhPthX9715RE=
+github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8NzMklzPG4d5KIOhIy30Tk=
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@@ -231,6 +530,7 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
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 golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190227160552-c95aed5357e7/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190301231341-16b79f2e4e95 h1:fY7Dsw114eJN4boqzVSbpVHO6rTdhq6/GnXeu+PKnzU=
 golang.org/x/net v0.0.0-20190301231341-16b79f2e4e95/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
@@ -307,18 +641,28 @@ golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33 h1:I6FyU15t786LL7oL/hn43zqTu
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20181116152217-5ac8a444bdc5/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20181205085412-a5c9d58dba9a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190219092855-153ac476189d/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190228124157-a34e9553db1e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190922100055-0a153f010e69/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191010194322-b09406accb47/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20191120155948-bd437916bb0e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200122134326-e047566fdf82 h1:ywK/j/KkyTHcdyYSZNXGjMwgmDSfjglYZ3vStQ/gSCU=
 golang.org/x/sys v0.0.0-20200122134326-e047566fdf82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepxRw6jWvR5iDRdvjHgy8=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/tools v0.0.0-20180221164845-07fd8470d635/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181030221726-6c7e314b6563/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20181130052023-1c3d964395ce/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -337,6 +681,8 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20180831171423-11092d34479b/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
+google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
@@ -349,6 +695,8 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
 gopkg.in/h2non/bimg.v1 v1.0.18 h1:qn6/RpBHt+7WQqoBcK+aF2puc6nC78eZj5LexxoalT4=
 gopkg.in/h2non/bimg.v1 v1.0.18/go.mod h1:PgsZL7dLwUbsGm1NYps320GxGgvQNTnecMCZqxV11So=
@@ -358,6 +706,7 @@ gopkg.in/macaroon.v2 v2.1.0 h1:HZcsjBCzq9t0eBPMKqTN/uSN6JOm78ZJ2INbqcBQOUI=
 gopkg.in/macaroon.v2 v2.1.0/go.mod h1:OUb+TQP/OP0WOerC2Jp/3CwhIKyIa9kQjuc7H24e6/o=
 gopkg.in/src-d/go-cli.v0 v0.0.0-20181105080154-d492247bbc0d/go.mod h1:z+K8VcOYVYcSwSjGebuDL6176A1XskgbtNl64NSg+n8=
 gopkg.in/src-d/go-log.v1 v1.0.1/go.mod h1:GN34hKP0g305ysm2/hctJ0Y8nWP3zxXXJ8GFabTyABE=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
@@ -365,4 +714,6 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5 h1:ymVxjfMaHvXD8RqPRmzHHsB3VvucivSkIAvJFDI5O3c=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

publicroomsapi/publicroomsapi.go

@@ -31,19 +31,15 @@ import (
 func SetupPublicRoomsAPIComponent(
 	base *basecomponent.BaseDendrite,
 	deviceDB devices.Database,
+	publicRoomsDB storage.Database,
 	rsQueryAPI roomserverAPI.RoomserverQueryAPI,
 	fedClient *gomatrixserverlib.FederationClient,
 	extRoomsProvider types.ExternalPublicRoomsProvider,
 ) {
-	publicRoomsDB, err := storage.NewPublicRoomsServerDatabase(string(base.Cfg.Database.PublicRoomsAPI))
-	if err != nil {
-		logrus.WithError(err).Panicf("failed to connect to public rooms db")
-	}
-
 	rsConsumer := consumers.NewOutputRoomEventConsumer(
 		base.Cfg, base.KafkaConsumer, publicRoomsDB, rsQueryAPI,
 	)
-	if err = rsConsumer.Start(); err != nil {
+	if err := rsConsumer.Start(); err != nil {
 		logrus.WithError(err).Panic("failed to start public rooms server consumer")
 	}
 

publicroomsapi/storage/storage.go

@@ -23,6 +23,9 @@ import (
 	"github.com/matrix-org/dendrite/publicroomsapi/storage/sqlite3"
 )
 
+const schemePostgres = "postgres"
+const schemeFile = "file"
+
 // NewPublicRoomsServerDatabase opens a database connection.
 func NewPublicRoomsServerDatabase(dataSourceName string) (Database, error) {
 	uri, err := url.Parse(dataSourceName)
@@ -30,9 +33,9 @@ func NewPublicRoomsServerDatabase(dataSourceName string) (Database, error) {
 		return postgres.NewPublicRoomsServerDatabase(dataSourceName)
 	}
 	switch uri.Scheme {
-	case "postgres":
+	case schemePostgres:
 		return postgres.NewPublicRoomsServerDatabase(dataSourceName)
-	case "file":
+	case schemeFile:
 		return sqlite3.NewPublicRoomsServerDatabase(dataSourceName)
 	default:
 		return postgres.NewPublicRoomsServerDatabase(dataSourceName)