feat: Waku v2 bridge

Issue #12610

vendor/github.com/status-im/mvds/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 Status
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/status-im/mvds/node/epoch_persistency.go

@@ -0,0 +1,33 @@
+package node
+
+import (
+	"database/sql"
+
+	"github.com/status-im/mvds/state"
+)
+
+type epochSQLitePersistence struct {
+	db *sql.DB
+}
+
+func newEpochSQLitePersistence(db *sql.DB) *epochSQLitePersistence {
+	return &epochSQLitePersistence{db: db}
+}
+
+func (p *epochSQLitePersistence) Get(nodeID state.PeerID) (epoch int64, err error) {
+	row := p.db.QueryRow(`SELECT epoch FROM mvds_epoch WHERE peer_id = ?`, nodeID[:])
+	err = row.Scan(&epoch)
+	if err == sql.ErrNoRows {
+		err = nil
+	}
+	return
+}
+
+func (p *epochSQLitePersistence) Set(nodeID state.PeerID, epoch int64) error {
+	_, err := p.db.Exec(`
+		INSERT OR REPLACE INTO mvds_epoch (peer_id, epoch) VALUES (?, ?)`,
+		nodeID[:],
+		epoch,
+	)
+	return err
+}

vendor/github.com/status-im/mvds/node/migrations/migrations.go

@@ -0,0 +1,321 @@
+// Code generated by go-bindata. DO NOT EDIT.
+// sources:
+// 1565345162_initial_schema.down.sql (23B)
+// 1565345162_initial_schema.up.sql (86B)
+// doc.go (377B)
+
+package migrations
+
+import (
+	"bytes"
+	"compress/gzip"
+	"crypto/sha256"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+func bindataRead(data []byte, name string) ([]byte, error) {
+	gz, err := gzip.NewReader(bytes.NewBuffer(data))
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %w", name, err)
+	}
+
+	var buf bytes.Buffer
+	_, err = io.Copy(&buf, gz)
+	clErr := gz.Close()
+
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %w", name, err)
+	}
+	if clErr != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+type asset struct {
+	bytes  []byte
+	info   os.FileInfo
+	digest [sha256.Size]byte
+}
+
+type bindataFileInfo struct {
+	name    string
+	size    int64
+	mode    os.FileMode
+	modTime time.Time
+}
+
+func (fi bindataFileInfo) Name() string {
+	return fi.name
+}
+func (fi bindataFileInfo) Size() int64 {
+	return fi.size
+}
+func (fi bindataFileInfo) Mode() os.FileMode {
+	return fi.mode
+}
+func (fi bindataFileInfo) ModTime() time.Time {
+	return fi.modTime
+}
+func (fi bindataFileInfo) IsDir() bool {
+	return false
+}
+func (fi bindataFileInfo) Sys() interface{} {
+	return nil
+}
+
+var __1565345162_initial_schemaDownSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x72\x09\xf2\x0f\x50\x08\x71\x74\xf2\x71\x55\xc8\x2d\x4b\x29\x8e\x4f\x2d\xc8\x4f\xce\xb0\xe6\x02\x04\x00\x00\xff\xff\xd3\x00\xf3\x23\x17\x00\x00\x00")
+
+func _1565345162_initial_schemaDownSqlBytes() ([]byte, error) {
+	return bindataRead(
+		__1565345162_initial_schemaDownSql,
+		"1565345162_initial_schema.down.sql",
+	)
+}
+
+func _1565345162_initial_schemaDownSql() (*asset, error) {
+	bytes, err := _1565345162_initial_schemaDownSqlBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "1565345162_initial_schema.down.sql", size: 23, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x7c, 0x69, 0xd2, 0x3, 0xea, 0x82, 0x7c, 0xb3, 0x44, 0x6c, 0xef, 0x64, 0x2c, 0x99, 0x62, 0xa2, 0x8b, 0x6f, 0x96, 0x4f, 0x34, 0x41, 0x87, 0xd5, 0x4e, 0x3, 0x7f, 0x4a, 0xd1, 0x91, 0x9, 0x99}}
+	return a, nil
+}
+
+var __1565345162_initial_schemaUpSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x72\x0e\x72\x75\x0c\x71\x55\x08\x71\x74\xf2\x71\x55\xc8\x2d\x4b\x29\x8e\x4f\x2d\xc8\x4f\xce\x50\xd0\xe0\x52\x50\x50\x50\x28\x48\x4d\x2d\x8a\xcf\x4c\x51\x70\xf2\xf1\x77\x52\x08\x08\xf2\xf4\x75\x0c\x8a\x54\xf0\x76\x8d\xd4\x01\xcb\x42\x54\x7a\xfa\x85\xb8\xba\xbb\x06\x29\xf8\xf9\x87\x28\xf8\x85\xfa\xf8\x70\x69\x5a\x73\x01\x02\x00\x00\xff\xff\x51\x96\x2d\xcb\x56\x00\x00\x00")
+
+func _1565345162_initial_schemaUpSqlBytes() ([]byte, error) {
+	return bindataRead(
+		__1565345162_initial_schemaUpSql,
+		"1565345162_initial_schema.up.sql",
+	)
+}
+
+func _1565345162_initial_schemaUpSql() (*asset, error) {
+	bytes, err := _1565345162_initial_schemaUpSqlBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "1565345162_initial_schema.up.sql", size: 86, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x78, 0x7c, 0xdd, 0x67, 0x61, 0x3e, 0x7f, 0xd4, 0xce, 0xb0, 0x17, 0xbe, 0x5a, 0xa7, 0x9e, 0x93, 0x34, 0xe8, 0xbb, 0x44, 0xfb, 0x88, 0xd6, 0x18, 0x6d, 0x9f, 0xb4, 0x22, 0xda, 0xbc, 0x87, 0x94}}
+	return a, nil
+}
+
+var _docGo = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x84\x8f\xbb\x6e\xc3\x30\x0c\x45\x77\x7f\xc5\x45\x96\x2c\xb5\xb4\x74\xea\xd6\xb1\x7b\x7f\x80\x91\x68\x89\x88\x1e\xae\x48\xe7\xf1\xf7\x85\xd3\x02\xcd\xd6\xf5\x00\xe7\xf0\xd2\x7b\x7c\x66\x51\x2c\x52\x18\xa2\x68\x1c\x58\x95\xc6\x1d\x27\x0e\xb4\x29\xe3\x90\xc4\xf2\x76\x72\xa1\x57\xaf\x46\xb6\xe9\x2c\xd5\x57\x49\x83\x8c\xfd\xe5\xf5\x30\x79\x8f\x40\xed\x68\xc8\xd4\x62\xe1\x47\x4b\xa1\x46\xc3\xa4\x25\x5c\xc5\x32\x08\xeb\xe0\x45\x6e\x0e\xef\x86\xc2\xa4\x06\xcb\x64\x47\x85\x65\x46\x20\xe5\x3d\xb3\xf4\x81\xd4\xe7\x93\xb4\x48\x46\x6e\x47\x1f\xcb\x13\xd9\x17\x06\x2a\x85\x23\x96\xd1\xeb\xc3\x55\xaa\x8c\x28\x83\x83\xf5\x71\x7f\x01\xa9\xb2\xa1\x51\x65\xdd\xfd\x4c\x17\x46\xeb\xbf\xe7\x41\x2d\xfe\xff\x11\xae\x7d\x9c\x15\xa4\xe0\xdb\xca\xc1\x38\xba\x69\x5a\x29\x9c\x29\x31\xf4\xab\x88\xf1\x34\x79\x9f\xfa\x5b\xe2\xc6\xbb\xf5\xbc\x71\x5e\xcf\x09\x3f\x35\xe9\x4d\x31\x77\x38\xe7\xff\x80\x4b\x1d\x6e\xfa\x0e\x00\x00\xff\xff\x9d\x60\x3d\x88\x79\x01\x00\x00")
+
+func docGoBytes() ([]byte, error) {
+	return bindataRead(
+		_docGo,
+		"doc.go",
+	)
+}
+
+func docGo() (*asset, error) {
+	bytes, err := docGoBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "doc.go", size: 377, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xef, 0xaf, 0xdf, 0xcf, 0x65, 0xae, 0x19, 0xfc, 0x9d, 0x29, 0xc1, 0x91, 0xaf, 0xb5, 0xd5, 0xb1, 0x56, 0xf3, 0xee, 0xa8, 0xba, 0x13, 0x65, 0xdb, 0xab, 0xcf, 0x4e, 0xac, 0x92, 0xe9, 0x60, 0xf1}}
+	return a, nil
+}
+
+// Asset loads and returns the asset for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func Asset(name string) ([]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
+		}
+		return a.bytes, nil
+	}
+	return nil, fmt.Errorf("Asset %s not found", name)
+}
+
+// AssetString returns the asset contents as a string (instead of a []byte).
+func AssetString(name string) (string, error) {
+	data, err := Asset(name)
+	return string(data), err
+}
+
+// MustAsset is like Asset but panics when Asset would return an error.
+// It simplifies safe initialization of global variables.
+func MustAsset(name string) []byte {
+	a, err := Asset(name)
+	if err != nil {
+		panic("asset: Asset(" + name + "): " + err.Error())
+	}
+
+	return a
+}
+
+// MustAssetString is like AssetString but panics when Asset would return an
+// error. It simplifies safe initialization of global variables.
+func MustAssetString(name string) string {
+	return string(MustAsset(name))
+}
+
+// AssetInfo loads and returns the asset info for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func AssetInfo(name string) (os.FileInfo, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
+		}
+		return a.info, nil
+	}
+	return nil, fmt.Errorf("AssetInfo %s not found", name)
+}
+
+// AssetDigest returns the digest of the file with the given name. It returns an
+// error if the asset could not be found or the digest could not be loaded.
+func AssetDigest(name string) ([sha256.Size]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s can't read by error: %v", name, err)
+		}
+		return a.digest, nil
+	}
+	return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s not found", name)
+}
+
+// Digests returns a map of all known files and their checksums.
+func Digests() (map[string][sha256.Size]byte, error) {
+	mp := make(map[string][sha256.Size]byte, len(_bindata))
+	for name := range _bindata {
+		a, err := _bindata[name]()
+		if err != nil {
+			return nil, err
+		}
+		mp[name] = a.digest
+	}
+	return mp, nil
+}
+
+// AssetNames returns the names of the assets.
+func AssetNames() []string {
+	names := make([]string, 0, len(_bindata))
+	for name := range _bindata {
+		names = append(names, name)
+	}
+	return names
+}
+
+// _bindata is a table, holding each asset generator, mapped to its name.
+var _bindata = map[string]func() (*asset, error){
+	"1565345162_initial_schema.down.sql": _1565345162_initial_schemaDownSql,
+	"1565345162_initial_schema.up.sql":   _1565345162_initial_schemaUpSql,
+	"doc.go":                             docGo,
+}
+
+// AssetDebug is true if the assets were built with the debug flag enabled.
+const AssetDebug = false
+
+// AssetDir returns the file names below a certain
+// directory embedded in the file by go-bindata.
+// For example if you run go-bindata on data/... and data contains the
+// following hierarchy:
+//
+//	data/
+//	  foo.txt
+//	  img/
+//	    a.png
+//	    b.png
+//
+// then AssetDir("data") would return []string{"foo.txt", "img"},
+// AssetDir("data/img") would return []string{"a.png", "b.png"},
+// AssetDir("foo.txt") and AssetDir("notexist") would return an error, and
+// AssetDir("") will return []string{"data"}.
+func AssetDir(name string) ([]string, error) {
+	node := _bintree
+	if len(name) != 0 {
+		canonicalName := strings.Replace(name, "\\", "/", -1)
+		pathList := strings.Split(canonicalName, "/")
+		for _, p := range pathList {
+			node = node.Children[p]
+			if node == nil {
+				return nil, fmt.Errorf("Asset %s not found", name)
+			}
+		}
+	}
+	if node.Func != nil {
+		return nil, fmt.Errorf("Asset %s not found", name)
+	}
+	rv := make([]string, 0, len(node.Children))
+	for childName := range node.Children {
+		rv = append(rv, childName)
+	}
+	return rv, nil
+}
+
+type bintree struct {
+	Func     func() (*asset, error)
+	Children map[string]*bintree
+}
+
+var _bintree = &bintree{nil, map[string]*bintree{
+	"1565345162_initial_schema.down.sql": {_1565345162_initial_schemaDownSql, map[string]*bintree{}},
+	"1565345162_initial_schema.up.sql":   {_1565345162_initial_schemaUpSql, map[string]*bintree{}},
+	"doc.go":                             {docGo, map[string]*bintree{}},
+}}
+
+// RestoreAsset restores an asset under the given directory.
+func RestoreAsset(dir, name string) error {
+	data, err := Asset(name)
+	if err != nil {
+		return err
+	}
+	info, err := AssetInfo(name)
+	if err != nil {
+		return err
+	}
+	err = os.MkdirAll(_filePath(dir, filepath.Dir(name)), os.FileMode(0755))
+	if err != nil {
+		return err
+	}
+	err = os.WriteFile(_filePath(dir, name), data, info.Mode())
+	if err != nil {
+		return err
+	}
+	return os.Chtimes(_filePath(dir, name), info.ModTime(), info.ModTime())
+}
+
+// RestoreAssets restores an asset under the given directory recursively.
+func RestoreAssets(dir, name string) error {
+	children, err := AssetDir(name)
+	// File
+	if err != nil {
+		return RestoreAsset(dir, name)
+	}
+	// Dir
+	for _, child := range children {
+		err = RestoreAssets(dir, filepath.Join(name, child))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func _filePath(dir, name string) string {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	return filepath.Join(append([]string{dir}, strings.Split(canonicalName, "/")...)...)
+}

vendor/github.com/status-im/mvds/node/node.go

@@ -0,0 +1,562 @@
+// Package node contains node logic.
+package node
+
+// @todo this is a very rough implementation that needs cleanup
+
+import (
+	"context"
+	"database/sql"
+	"encoding/hex"
+	"fmt"
+	"sync/atomic"
+	"time"
+
+	"go.uber.org/zap"
+
+	"github.com/status-im/mvds/peers"
+	"github.com/status-im/mvds/protobuf"
+	"github.com/status-im/mvds/state"
+	"github.com/status-im/mvds/store"
+	"github.com/status-im/mvds/transport"
+)
+
+// Mode represents the synchronization mode.
+type Mode int
+
+const (
+	INTERACTIVE Mode = iota
+	BATCH
+)
+
+// CalculateNextEpoch is a function used to calculate the next `SendEpoch` for a given message.
+type CalculateNextEpoch func(count uint64, epoch int64) int64
+
+// Node represents an MVDS node, it runs all the logic like sending and receiving protocol messages.
+type Node struct {
+	// This needs to be declared first: https://github.com/golang/go/issues/9959
+	epoch  int64
+	ctx    context.Context
+	cancel context.CancelFunc
+
+	store     store.MessageStore
+	transport transport.Transport
+
+	syncState state.SyncState
+
+	peers peers.Persistence
+
+	payloads payloads
+
+	nextEpoch CalculateNextEpoch
+
+	ID state.PeerID
+
+	epochPersistence *epochSQLitePersistence
+	mode             Mode
+
+	subscription chan protobuf.Message
+
+	logger *zap.Logger
+}
+
+func NewPersistentNode(
+	db *sql.DB,
+	st transport.Transport,
+	id state.PeerID,
+	mode Mode,
+	nextEpoch CalculateNextEpoch,
+	logger *zap.Logger,
+) (*Node, error) {
+	ctx, cancel := context.WithCancel(context.Background())
+	if logger == nil {
+		logger = zap.NewNop()
+	}
+
+	node := Node{
+		ID:               id,
+		ctx:              ctx,
+		cancel:           cancel,
+		store:            store.NewPersistentMessageStore(db),
+		transport:        st,
+		peers:            peers.NewSQLitePersistence(db),
+		syncState:        state.NewPersistentSyncState(db),
+		payloads:         newPayloads(),
+		epochPersistence: newEpochSQLitePersistence(db),
+		nextEpoch:        nextEpoch,
+		logger:           logger.With(zap.Namespace("mvds")),
+		mode:             mode,
+	}
+	if currentEpoch, err := node.epochPersistence.Get(id); err != nil {
+		return nil, err
+	} else {
+		node.epoch = currentEpoch
+	}
+	return &node, nil
+}
+
+func NewEphemeralNode(
+	id state.PeerID,
+	t transport.Transport,
+	nextEpoch CalculateNextEpoch,
+	currentEpoch int64,
+	mode Mode,
+	logger *zap.Logger,
+) *Node {
+	ctx, cancel := context.WithCancel(context.Background())
+	if logger == nil {
+		logger = zap.NewNop()
+	}
+
+	return &Node{
+		ID:        id,
+		ctx:       ctx,
+		cancel:    cancel,
+		store:     store.NewDummyStore(),
+		transport: t,
+		syncState: state.NewSyncState(),
+		peers:     peers.NewMemoryPersistence(),
+		payloads:  newPayloads(),
+		nextEpoch: nextEpoch,
+		epoch:     currentEpoch,
+		logger:    logger.With(zap.Namespace("mvds")),
+		mode:      mode,
+	}
+}
+
+// NewNode returns a new node.
+func NewNode(
+	ms store.MessageStore,
+	st transport.Transport,
+	ss state.SyncState,
+	nextEpoch CalculateNextEpoch,
+	currentEpoch int64,
+	id state.PeerID,
+	mode Mode,
+	pp peers.Persistence,
+	logger *zap.Logger,
+) *Node {
+	ctx, cancel := context.WithCancel(context.Background())
+	if logger == nil {
+		logger = zap.NewNop()
+	}
+
+	return &Node{
+		ctx:       ctx,
+		cancel:    cancel,
+		store:     ms,
+		transport: st,
+		syncState: ss,
+		peers:     pp,
+		payloads:  newPayloads(),
+		nextEpoch: nextEpoch,
+		ID:        id,
+		epoch:     currentEpoch,
+		logger:    logger.With(zap.Namespace("mvds")),
+		mode:      mode,
+	}
+}
+
+func (n *Node) CurrentEpoch() int64 {
+	return atomic.LoadInt64(&n.epoch)
+}
+
+// Start listens for new messages received by the node and sends out those required every epoch.
+func (n *Node) Start(duration time.Duration) {
+	go func() {
+		for {
+			select {
+			case <-n.ctx.Done():
+				n.logger.Info("Watch stopped")
+				return
+			default:
+				p := n.transport.Watch()
+				go n.onPayload(p.Sender, p.Payload)
+			}
+		}
+	}()
+
+	go func() {
+		for {
+			select {
+			case <-n.ctx.Done():
+				n.logger.Info("Epoch processing stopped")
+				return
+			default:
+				n.logger.Debug("Epoch processing", zap.String("node", hex.EncodeToString(n.ID[:4])), zap.Int64("epoch", n.epoch))
+				time.Sleep(duration)
+				err := n.sendMessages()
+				if err != nil {
+					n.logger.Error("Error sending messages.", zap.Error(err))
+				}
+				atomic.AddInt64(&n.epoch, 1)
+				// When a persistent node is used, the epoch needs to be saved.
+				if n.epochPersistence != nil {
+					if err := n.epochPersistence.Set(n.ID, n.epoch); err != nil {
+						n.logger.Error("Failed to persisten epoch", zap.Error(err))
+					}
+				}
+			}
+		}
+	}()
+}
+
+// Stop message reading and epoch processing
+func (n *Node) Stop() {
+	n.logger.Info("Stopping node")
+	n.Unsubscribe()
+	n.cancel()
+}
+
+// Subscribe subscribes to incoming messages.
+func (n *Node) Subscribe() chan protobuf.Message {
+	n.subscription = make(chan protobuf.Message)
+	return n.subscription
+}
+
+// Unsubscribe closes the listening channels
+func (n *Node) Unsubscribe() {
+	if n.subscription != nil {
+		close(n.subscription)
+	}
+	n.subscription = nil
+}
+
+// AppendMessage sends a message to a given group.
+func (n *Node) AppendMessage(groupID state.GroupID, data []byte) (state.MessageID, error) {
+	m := protobuf.Message{
+		GroupId:   groupID[:],
+		Timestamp: time.Now().Unix(),
+		Body:      data,
+	}
+
+	id := m.ID()
+
+	peers, err := n.peers.GetByGroupID(groupID)
+	if err != nil {
+		return state.MessageID{}, fmt.Errorf("trying to send to unknown group %x", groupID[:4])
+	}
+
+	err = n.store.Add(&m)
+	if err != nil {
+		return state.MessageID{}, err
+	}
+
+	for _, p := range peers {
+		t := state.OFFER
+		if n.mode == BATCH {
+			t = state.MESSAGE
+		}
+
+		n.insertSyncState(&groupID, id, p, t)
+	}
+
+	n.logger.Debug("Sending message",
+		zap.String("node", hex.EncodeToString(n.ID[:4])),
+		zap.String("groupID", hex.EncodeToString(groupID[:4])),
+		zap.String("id", hex.EncodeToString(id[:4])))
+	// @todo think about a way to insta trigger send messages when send was selected, we don't wanna wait for ticks here
+
+	return id, nil
+}
+
+// RequestMessage adds a REQUEST record to the next payload for a given message ID.
+func (n *Node) RequestMessage(group state.GroupID, id state.MessageID) error {
+	peers, err := n.peers.GetByGroupID(group)
+	if err != nil {
+		return fmt.Errorf("trying to request from an unknown group %x", group[:4])
+	}
+
+	for _, p := range peers {
+		exist, err := n.IsPeerInGroup(group, p)
+		if err != nil {
+			return err
+		}
+
+		if exist {
+			continue
+		}
+
+		n.insertSyncState(&group, id, p, state.REQUEST)
+	}
+
+	return nil
+}
+
+// AddPeer adds a peer to a specific group making it a recipient of messages.
+func (n *Node) AddPeer(group state.GroupID, id state.PeerID) error {
+	return n.peers.Add(group, id)
+}
+
+// IsPeerInGroup checks whether a peer is in the specified group.
+func (n *Node) IsPeerInGroup(g state.GroupID, p state.PeerID) (bool, error) {
+	return n.peers.Exists(g, p)
+}
+
+func (n *Node) sendMessages() error {
+	err := n.syncState.Map(n.epoch, func(s state.State) state.State {
+		m := s.MessageID
+		p := s.PeerID
+		switch s.Type {
+		case state.OFFER:
+			n.payloads.AddOffers(p, m[:])
+		case state.REQUEST:
+			n.payloads.AddRequests(p, m[:])
+			n.logger.Debug("sending REQUEST",
+				zap.String("from", hex.EncodeToString(n.ID[:4])),
+				zap.String("to", hex.EncodeToString(p[:4])),
+				zap.String("messageID", hex.EncodeToString(m[:4])),
+			)
+
+		case state.MESSAGE:
+			g := *s.GroupID
+			//  TODO: Handle errors
+			exist, err := n.IsPeerInGroup(g, p)
+			if err != nil {
+				return s
+			}
+
+			if !exist {
+				return s
+			}
+
+			msg, err := n.store.Get(m)
+			if err != nil {
+				n.logger.Error("Failed to retreive message",
+					zap.String("messageID", hex.EncodeToString(m[:4])),
+					zap.Error(err),
+				)
+
+				return s
+			}
+
+			n.payloads.AddMessages(p, msg)
+			n.logger.Debug("sending MESSAGE",
+				zap.String("groupID", hex.EncodeToString(g[:4])),
+				zap.String("from", hex.EncodeToString(n.ID[:4])),
+				zap.String("to", hex.EncodeToString(p[:4])),
+				zap.String("messageID", hex.EncodeToString(m[:4])),
+			)
+
+		}
+
+		return n.updateSendEpoch(s)
+	})
+
+	if err != nil {
+		n.logger.Error("error while mapping sync state", zap.Error(err))
+		return err
+	}
+
+	return n.payloads.MapAndClear(func(peer state.PeerID, payload *protobuf.Payload) error {
+		err := n.transport.Send(n.ID, peer, payload)
+		if err != nil {
+			n.logger.Error("error sending message", zap.Error(err))
+			return err
+		}
+		return nil
+	})
+
+}
+
+func (n *Node) onPayload(sender state.PeerID, payload *protobuf.Payload) {
+	// Acks, Requests and Offers are all arrays of bytes as protobuf doesn't allow type aliases otherwise arrays of messageIDs would be nicer.
+	if err := n.onAck(sender, payload.Acks); err != nil {
+		n.logger.Error("error processing acks", zap.Error(err))
+	}
+	if err := n.onRequest(sender, payload.Requests); err != nil {
+		n.logger.Error("error processing requests", zap.Error(err))
+	}
+	if err := n.onOffer(sender, payload.Offers); err != nil {
+		n.logger.Error("error processing offers", zap.Error(err))
+	}
+	messageIds := n.onMessages(sender, payload.Messages)
+	n.payloads.AddAcks(sender, messageIds)
+}
+
+func (n *Node) onOffer(sender state.PeerID, offers [][]byte) error {
+	for _, raw := range offers {
+		id := toMessageID(raw)
+		n.logger.Debug("OFFER received",
+			zap.String("from", hex.EncodeToString(sender[:4])),
+			zap.String("to", hex.EncodeToString(n.ID[:4])),
+			zap.String("messageID", hex.EncodeToString(id[:4])),
+		)
+
+		exist, err := n.store.Has(id)
+		// @todo maybe ack?
+		if err != nil {
+			return err
+		}
+
+		if exist {
+			continue
+		}
+
+		n.insertSyncState(nil, id, sender, state.REQUEST)
+	}
+	return nil
+}
+
+func (n *Node) onRequest(sender state.PeerID, requests [][]byte) error {
+	for _, raw := range requests {
+		id := toMessageID(raw)
+		n.logger.Debug("REQUEST received",
+			zap.String("from", hex.EncodeToString(sender[:4])),
+			zap.String("to", hex.EncodeToString(n.ID[:4])),
+			zap.String("messageID", hex.EncodeToString(id[:4])),
+		)
+
+		message, err := n.store.Get(id)
+		if err != nil {
+			return err
+		}
+
+		if message == nil {
+			n.logger.Error("message does not exist", zap.String("messageID", hex.EncodeToString(id[:4])))
+			continue
+		}
+
+		groupID := toGroupID(message.GroupId)
+
+		exist, err := n.IsPeerInGroup(groupID, sender)
+		if err != nil {
+			return err
+		}
+
+		if !exist {
+			n.logger.Error("peer is not in group",
+				zap.String("groupID", hex.EncodeToString(groupID[:4])),
+				zap.String("peer", hex.EncodeToString(sender[:4])),
+			)
+			continue
+		}
+
+		n.insertSyncState(&groupID, id, sender, state.MESSAGE)
+	}
+
+	return nil
+}
+
+func (n *Node) onAck(sender state.PeerID, acks [][]byte) error {
+	for _, ack := range acks {
+		id := toMessageID(ack)
+
+		err := n.syncState.Remove(id, sender)
+		if err != nil {
+			n.logger.Error("Error while removing sync state.", zap.Error(err))
+			return err
+		}
+
+		n.logger.Debug("ACK received",
+			zap.String("from", hex.EncodeToString(sender[:4])),
+			zap.String("to", hex.EncodeToString(n.ID[:4])),
+			zap.String("messageID", hex.EncodeToString(id[:4])),
+		)
+
+	}
+	return nil
+}
+
+func (n *Node) onMessages(sender state.PeerID, messages []*protobuf.Message) [][]byte {
+	a := make([][]byte, 0)
+
+	for _, m := range messages {
+		groupID := toGroupID(m.GroupId)
+		err := n.onMessage(sender, *m)
+		if err != nil {
+			n.logger.Error("Error processing message", zap.Error(err))
+			continue
+		}
+
+		id := m.ID()
+		n.logger.Debug("sending ACK",
+			zap.String("groupID", hex.EncodeToString(groupID[:4])),
+			zap.String("from", hex.EncodeToString(n.ID[:4])),
+			zap.String("", hex.EncodeToString(sender[:4])),
+			zap.String("messageID", hex.EncodeToString(id[:4])),
+		)
+
+		a = append(a, id[:])
+	}
+
+	return a
+}
+
+func (n *Node) onMessage(sender state.PeerID, msg protobuf.Message) error {
+	id := msg.ID()
+	groupID := toGroupID(msg.GroupId)
+	n.logger.Debug("MESSAGE received",
+		zap.String("from", hex.EncodeToString(sender[:4])),
+		zap.String("to", hex.EncodeToString(n.ID[:4])),
+		zap.String("messageID", hex.EncodeToString(id[:4])),
+	)
+
+	err := n.syncState.Remove(id, sender)
+	if err != nil && err != state.ErrStateNotFound {
+		return err
+	}
+
+	err = n.store.Add(&msg)
+	if err != nil {
+		return err
+		// @todo process, should this function ever even have an error?
+	}
+
+	peers, err := n.peers.GetByGroupID(groupID)
+	if err != nil {
+		return err
+	}
+
+	for _, peer := range peers {
+		if peer == sender {
+			continue
+		}
+
+		n.insertSyncState(&groupID, id, peer, state.OFFER)
+	}
+
+	if n.subscription != nil {
+		n.subscription <- msg
+	}
+
+	return nil
+}
+
+func (n *Node) insertSyncState(groupID *state.GroupID, messageID state.MessageID, peerID state.PeerID, t state.RecordType) {
+	s := state.State{
+		GroupID:   groupID,
+		MessageID: messageID,
+		PeerID:    peerID,
+		Type:      t,
+		SendEpoch: n.epoch + 1,
+	}
+
+	err := n.syncState.Add(s)
+	if err != nil {
+		n.logger.Error("error setting sync states",
+			zap.Error(err),
+			zap.String("groupID", hex.EncodeToString(groupID[:4])),
+			zap.String("messageID", hex.EncodeToString(messageID[:4])),
+			zap.String("peerID", hex.EncodeToString(peerID[:4])),
+		)
+
+	}
+}
+
+func (n *Node) updateSendEpoch(s state.State) state.State {
+	s.SendCount += 1
+	s.SendEpoch = n.nextEpoch(s.SendCount, n.epoch)
+	return s
+}
+
+func toMessageID(b []byte) state.MessageID {
+	var id state.MessageID
+	copy(id[:], b)
+	return id
+}
+
+func toGroupID(b []byte) state.GroupID {
+	var id state.GroupID
+	copy(id[:], b)
+	return id
+}

vendor/github.com/status-im/mvds/node/payloads.go

@@ -0,0 +1,96 @@
+package node
+
+import (
+	"sync"
+
+	"github.com/status-im/mvds/protobuf"
+	"github.com/status-im/mvds/state"
+)
+
+type payloads struct {
+	sync.Mutex
+
+	payloads map[state.PeerID]*protobuf.Payload
+}
+
+// @todo check in all the functions below that we aren't duplicating stuff
+
+func newPayloads() payloads {
+	return payloads{
+		payloads: make(map[state.PeerID]*protobuf.Payload),
+	}
+}
+
+func (p *payloads) AddOffers(peer state.PeerID, offers ...[]byte) {
+	p.Lock()
+	defer p.Unlock()
+
+	payload := p.get(peer)
+
+	payload.Offers = append(payload.Offers, offers...)
+
+	p.set(peer, payload)
+}
+
+func (p *payloads) AddAcks(peer state.PeerID, acks [][]byte) {
+	p.Lock()
+	defer p.Unlock()
+
+	payload := p.get(peer)
+
+	payload.Acks = append(payload.Acks, acks...)
+
+	p.set(peer, payload)
+}
+
+func (p *payloads) AddRequests(peer state.PeerID, request ...[]byte) {
+	p.Lock()
+	defer p.Unlock()
+
+	payload := p.get(peer)
+
+	payload.Requests = append(payload.Requests, request...)
+
+	p.set(peer, payload)
+}
+
+func (p *payloads) AddMessages(peer state.PeerID, messages ...*protobuf.Message) {
+	p.Lock()
+	defer p.Unlock()
+
+	payload := p.get(peer)
+	if payload.Messages == nil {
+		payload.Messages = make([]*protobuf.Message, 0)
+	}
+
+	payload.Messages = append(payload.Messages, messages...)
+	p.set(peer, payload)
+}
+
+func (p *payloads) MapAndClear(f func(state.PeerID, *protobuf.Payload) error) error {
+	p.Lock()
+	defer p.Unlock()
+
+	for peer, payload := range p.payloads {
+		err := f(peer, payload)
+		if err != nil {
+			return err
+		}
+	}
+
+	// TODO: this should only be called upon confirmation that the message has been sent
+	p.payloads = make(map[state.PeerID]*protobuf.Payload)
+	return nil
+}
+
+func (p *payloads) get(peer state.PeerID) *protobuf.Payload {
+	payload := p.payloads[peer]
+	if payload == nil {
+		return &protobuf.Payload{}
+	}
+	return payload
+}
+
+func (p *payloads) set(peer state.PeerID, payload *protobuf.Payload) {
+	p.payloads[peer] = payload
+}

vendor/github.com/status-im/mvds/peers/migrations/migrations.go

@@ -0,0 +1,321 @@
+// Code generated by go-bindata. DO NOT EDIT.
+// sources:
+// 1565249278_initial_schema.down.sql (23B)
+// 1565249278_initial_schema.up.sql (140B)
+// doc.go (377B)
+
+package migrations
+
+import (
+	"bytes"
+	"compress/gzip"
+	"crypto/sha256"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+func bindataRead(data []byte, name string) ([]byte, error) {
+	gz, err := gzip.NewReader(bytes.NewBuffer(data))
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %w", name, err)
+	}
+
+	var buf bytes.Buffer
+	_, err = io.Copy(&buf, gz)
+	clErr := gz.Close()
+
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %w", name, err)
+	}
+	if clErr != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+type asset struct {
+	bytes  []byte
+	info   os.FileInfo
+	digest [sha256.Size]byte
+}
+
+type bindataFileInfo struct {
+	name    string
+	size    int64
+	mode    os.FileMode
+	modTime time.Time
+}
+
+func (fi bindataFileInfo) Name() string {
+	return fi.name
+}
+func (fi bindataFileInfo) Size() int64 {
+	return fi.size
+}
+func (fi bindataFileInfo) Mode() os.FileMode {
+	return fi.mode
+}
+func (fi bindataFileInfo) ModTime() time.Time {
+	return fi.modTime
+}
+func (fi bindataFileInfo) IsDir() bool {
+	return false
+}
+func (fi bindataFileInfo) Sys() interface{} {
+	return nil
+}
+
+var __1565249278_initial_schemaDownSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x72\x09\xf2\x0f\x50\x08\x71\x74\xf2\x71\x55\xc8\x2d\x4b\x29\x8e\x2f\x48\x4d\x2d\x2a\xb6\xe6\x02\x04\x00\x00\xff\xff\x58\x44\x68\xf7\x17\x00\x00\x00")
+
+func _1565249278_initial_schemaDownSqlBytes() ([]byte, error) {
+	return bindataRead(
+		__1565249278_initial_schemaDownSql,
+		"1565249278_initial_schema.down.sql",
+	)
+}
+
+func _1565249278_initial_schemaDownSql() (*asset, error) {
+	bytes, err := _1565249278_initial_schemaDownSqlBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "1565249278_initial_schema.down.sql", size: 23, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x4, 0xfb, 0x5, 0x92, 0xf0, 0x93, 0xaa, 0x83, 0xb7, 0xdf, 0x66, 0xe2, 0x97, 0x53, 0x9d, 0x34, 0xd3, 0xca, 0x97, 0xd8, 0xe1, 0xed, 0xf0, 0x4a, 0x94, 0x1a, 0xb1, 0x8f, 0xcf, 0xc, 0xa4, 0x6}}
+	return a, nil
+}
+
+var __1565249278_initial_schemaUpSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x72\x0e\x72\x75\x0c\x71\x55\x08\x71\x74\xf2\x71\x55\xc8\x2d\x4b\x29\x8e\x2f\x48\x4d\x2d\x2a\x56\xd0\xe0\x52\x50\x50\x50\x48\x2f\xca\x2f\x2d\x88\xcf\x4c\x51\x70\xf2\xf1\x77\x52\xf0\xf3\x0f\x51\xf0\x0b\xf5\xf1\xd1\x01\xcb\x81\xd4\xe1\x90\x0a\x08\xf2\xf4\x75\x0c\x8a\x54\xf0\x76\x8d\x54\xd0\x80\x99\xa1\x03\xd3\xa1\xa9\xe0\xef\xa7\xe0\xec\xef\xe7\xe6\xe3\xe9\x1c\xa2\x10\xe4\x1a\xe0\xe3\xe8\xec\xca\xa5\x69\xcd\x05\x08\x00\x00\xff\xff\x67\x63\xbf\x36\x8c\x00\x00\x00")
+
+func _1565249278_initial_schemaUpSqlBytes() ([]byte, error) {
+	return bindataRead(
+		__1565249278_initial_schemaUpSql,
+		"1565249278_initial_schema.up.sql",
+	)
+}
+
+func _1565249278_initial_schemaUpSql() (*asset, error) {
+	bytes, err := _1565249278_initial_schemaUpSqlBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "1565249278_initial_schema.up.sql", size: 140, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x8a, 0xbc, 0x3a, 0x87, 0x12, 0x93, 0xeb, 0xb4, 0xcc, 0x42, 0x6e, 0xb2, 0x7d, 0xfa, 0x9a, 0xa8, 0x3f, 0xb, 0x6b, 0xa8, 0x2d, 0x8b, 0xde, 0x67, 0x2a, 0xa8, 0xa5, 0x42, 0xad, 0x27, 0x15, 0x7e}}
+	return a, nil
+}
+
+var _docGo = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x84\x8f\xbb\x6e\xc3\x30\x0c\x45\x77\x7f\xc5\x45\x96\x2c\xb5\xb4\x74\xea\xd6\xb1\x7b\x7f\x80\x91\x68\x89\x88\x1e\xae\x48\xe7\xf1\xf7\x85\xd3\x02\xcd\xd6\xf5\x00\xe7\xf0\xd2\x7b\x7c\x66\x51\x2c\x52\x18\xa2\x68\x1c\x58\x95\xc6\x1d\x27\x0e\xb4\x29\xe3\x90\xc4\xf2\x76\x72\xa1\x57\xaf\x46\xb6\xe9\x2c\xd5\x57\x49\x83\x8c\xfd\xe5\xf5\x30\x79\x8f\x40\xed\x68\xc8\xd4\x62\xe1\x47\x4b\xa1\x46\xc3\xa4\x25\x5c\xc5\x32\x08\xeb\xe0\x45\x6e\x0e\xef\x86\xc2\xa4\x06\xcb\x64\x47\x85\x65\x46\x20\xe5\x3d\xb3\xf4\x81\xd4\xe7\x93\xb4\x48\x46\x6e\x47\x1f\xcb\x13\xd9\x17\x06\x2a\x85\x23\x96\xd1\xeb\xc3\x55\xaa\x8c\x28\x83\x83\xf5\x71\x7f\x01\xa9\xb2\xa1\x51\x65\xdd\xfd\x4c\x17\x46\xeb\xbf\xe7\x41\x2d\xfe\xff\x11\xae\x7d\x9c\x15\xa4\xe0\xdb\xca\xc1\x38\xba\x69\x5a\x29\x9c\x29\x31\xf4\xab\x88\xf1\x34\x79\x9f\xfa\x5b\xe2\xc6\xbb\xf5\xbc\x71\x5e\xcf\x09\x3f\x35\xe9\x4d\x31\x77\x38\xe7\xff\x80\x4b\x1d\x6e\xfa\x0e\x00\x00\xff\xff\x9d\x60\x3d\x88\x79\x01\x00\x00")
+
+func docGoBytes() ([]byte, error) {
+	return bindataRead(
+		_docGo,
+		"doc.go",
+	)
+}
+
+func docGo() (*asset, error) {
+	bytes, err := docGoBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "doc.go", size: 377, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xef, 0xaf, 0xdf, 0xcf, 0x65, 0xae, 0x19, 0xfc, 0x9d, 0x29, 0xc1, 0x91, 0xaf, 0xb5, 0xd5, 0xb1, 0x56, 0xf3, 0xee, 0xa8, 0xba, 0x13, 0x65, 0xdb, 0xab, 0xcf, 0x4e, 0xac, 0x92, 0xe9, 0x60, 0xf1}}
+	return a, nil
+}
+
+// Asset loads and returns the asset for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func Asset(name string) ([]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
+		}
+		return a.bytes, nil
+	}
+	return nil, fmt.Errorf("Asset %s not found", name)
+}
+
+// AssetString returns the asset contents as a string (instead of a []byte).
+func AssetString(name string) (string, error) {
+	data, err := Asset(name)
+	return string(data), err
+}
+
+// MustAsset is like Asset but panics when Asset would return an error.
+// It simplifies safe initialization of global variables.
+func MustAsset(name string) []byte {
+	a, err := Asset(name)
+	if err != nil {
+		panic("asset: Asset(" + name + "): " + err.Error())
+	}
+
+	return a
+}
+
+// MustAssetString is like AssetString but panics when Asset would return an
+// error. It simplifies safe initialization of global variables.
+func MustAssetString(name string) string {
+	return string(MustAsset(name))
+}
+
+// AssetInfo loads and returns the asset info for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func AssetInfo(name string) (os.FileInfo, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
+		}
+		return a.info, nil
+	}
+	return nil, fmt.Errorf("AssetInfo %s not found", name)
+}
+
+// AssetDigest returns the digest of the file with the given name. It returns an
+// error if the asset could not be found or the digest could not be loaded.
+func AssetDigest(name string) ([sha256.Size]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s can't read by error: %v", name, err)
+		}
+		return a.digest, nil
+	}
+	return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s not found", name)
+}
+
+// Digests returns a map of all known files and their checksums.
+func Digests() (map[string][sha256.Size]byte, error) {
+	mp := make(map[string][sha256.Size]byte, len(_bindata))
+	for name := range _bindata {
+		a, err := _bindata[name]()
+		if err != nil {
+			return nil, err
+		}
+		mp[name] = a.digest
+	}
+	return mp, nil
+}
+
+// AssetNames returns the names of the assets.
+func AssetNames() []string {
+	names := make([]string, 0, len(_bindata))
+	for name := range _bindata {
+		names = append(names, name)
+	}
+	return names
+}
+
+// _bindata is a table, holding each asset generator, mapped to its name.
+var _bindata = map[string]func() (*asset, error){
+	"1565249278_initial_schema.down.sql": _1565249278_initial_schemaDownSql,
+	"1565249278_initial_schema.up.sql":   _1565249278_initial_schemaUpSql,
+	"doc.go":                             docGo,
+}
+
+// AssetDebug is true if the assets were built with the debug flag enabled.
+const AssetDebug = false
+
+// AssetDir returns the file names below a certain
+// directory embedded in the file by go-bindata.
+// For example if you run go-bindata on data/... and data contains the
+// following hierarchy:
+//
+//	data/
+//	  foo.txt
+//	  img/
+//	    a.png
+//	    b.png
+//
+// then AssetDir("data") would return []string{"foo.txt", "img"},
+// AssetDir("data/img") would return []string{"a.png", "b.png"},
+// AssetDir("foo.txt") and AssetDir("notexist") would return an error, and
+// AssetDir("") will return []string{"data"}.
+func AssetDir(name string) ([]string, error) {
+	node := _bintree
+	if len(name) != 0 {
+		canonicalName := strings.Replace(name, "\\", "/", -1)
+		pathList := strings.Split(canonicalName, "/")
+		for _, p := range pathList {
+			node = node.Children[p]
+			if node == nil {
+				return nil, fmt.Errorf("Asset %s not found", name)
+			}
+		}
+	}
+	if node.Func != nil {
+		return nil, fmt.Errorf("Asset %s not found", name)
+	}
+	rv := make([]string, 0, len(node.Children))
+	for childName := range node.Children {
+		rv = append(rv, childName)
+	}
+	return rv, nil
+}
+
+type bintree struct {
+	Func     func() (*asset, error)
+	Children map[string]*bintree
+}
+
+var _bintree = &bintree{nil, map[string]*bintree{
+	"1565249278_initial_schema.down.sql": {_1565249278_initial_schemaDownSql, map[string]*bintree{}},
+	"1565249278_initial_schema.up.sql":   {_1565249278_initial_schemaUpSql, map[string]*bintree{}},
+	"doc.go":                             {docGo, map[string]*bintree{}},
+}}
+
+// RestoreAsset restores an asset under the given directory.
+func RestoreAsset(dir, name string) error {
+	data, err := Asset(name)
+	if err != nil {
+		return err
+	}
+	info, err := AssetInfo(name)
+	if err != nil {
+		return err
+	}
+	err = os.MkdirAll(_filePath(dir, filepath.Dir(name)), os.FileMode(0755))
+	if err != nil {
+		return err
+	}
+	err = os.WriteFile(_filePath(dir, name), data, info.Mode())
+	if err != nil {
+		return err
+	}
+	return os.Chtimes(_filePath(dir, name), info.ModTime(), info.ModTime())
+}
+
+// RestoreAssets restores an asset under the given directory recursively.
+func RestoreAssets(dir, name string) error {
+	children, err := AssetDir(name)
+	// File
+	if err != nil {
+		return RestoreAsset(dir, name)
+	}
+	// Dir
+	for _, child := range children {
+		err = RestoreAssets(dir, filepath.Join(name, child))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func _filePath(dir, name string) string {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	return filepath.Join(append([]string{dir}, strings.Split(canonicalName, "/")...)...)
+}

vendor/github.com/status-im/mvds/peers/persistence.go

@@ -0,0 +1,11 @@
+package peers
+
+import (
+	"github.com/status-im/mvds/state"
+)
+
+type Persistence interface {
+	Add(state.GroupID, state.PeerID) error
+	GetByGroupID(group state.GroupID) ([]state.PeerID, error)
+	Exists(state.GroupID, state.PeerID) (bool, error)
+}

vendor/github.com/status-im/mvds/peers/persistence_memory.go

@@ -0,0 +1,32 @@
+package peers
+
+import "github.com/status-im/mvds/state"
+
+type MemoryPersistence struct {
+	peers map[state.GroupID][]state.PeerID
+}
+
+func NewMemoryPersistence() *MemoryPersistence {
+	return &MemoryPersistence{
+		peers: make(map[state.GroupID][]state.PeerID),
+	}
+}
+
+func (p *MemoryPersistence) Add(groupID state.GroupID, peerID state.PeerID) error {
+	p.peers[groupID] = append(p.peers[groupID], peerID)
+	return nil
+}
+
+func (p *MemoryPersistence) Exists(groupID state.GroupID, peerID state.PeerID) (bool, error) {
+	for _, peer := range p.peers[groupID] {
+		if peer == peerID {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+func (p *MemoryPersistence) GetByGroupID(groupID state.GroupID) ([]state.PeerID, error) {
+	return p.peers[groupID], nil
+}
+

vendor/github.com/status-im/mvds/peers/persistence_sqlite.go

@@ -0,0 +1,63 @@
+package peers
+
+import (
+	"database/sql"
+	"errors"
+
+	"github.com/status-im/mvds/state"
+)
+
+var (
+	ErrPeerNotFound = errors.New("peer not found")
+)
+
+type sqlitePersistence struct {
+	db *sql.DB
+}
+
+func NewSQLitePersistence(db *sql.DB) sqlitePersistence {
+	return sqlitePersistence{db: db}
+}
+
+func (p sqlitePersistence) Add(groupID state.GroupID, peerID state.PeerID) error {
+	_, err := p.db.Exec(`INSERT INTO mvds_peers (group_id, peer_id) VALUES (?, ?)`, groupID[:], peerID[:])
+	return err
+}
+
+func (p sqlitePersistence) Exists(groupID state.GroupID, peerID state.PeerID) (bool, error) {
+	var result bool
+	err := p.db.QueryRow(
+		`SELECT EXISTS(SELECT 1 FROM mvds_peers WHERE group_id = ? AND peer_id = ?)`,
+		groupID[:],
+		peerID[:],
+	).Scan(&result)
+	switch err {
+	case sql.ErrNoRows:
+		return false, ErrPeerNotFound
+	case nil:
+		return result, nil
+	default:
+		return false, err
+	}
+}
+
+func (p sqlitePersistence) GetByGroupID(groupID state.GroupID) (result []state.PeerID, err error) {
+	rows, err := p.db.Query(`SELECT peer_id FROM mvds_peers WHERE group_id = ?`, groupID[:])
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var (
+			peerIDBytes []byte
+			peerID      state.PeerID
+		)
+		if err := rows.Scan(&peerIDBytes); err != nil {
+			return nil, err
+		}
+		copy(peerID[:], peerIDBytes)
+		result = append(result, peerID)
+	}
+	return
+}

vendor/github.com/status-im/mvds/persistenceutil/migrations.go

@@ -0,0 +1,70 @@
+package persistenceutil
+
+import (
+	"github.com/pkg/errors"
+	"strings"
+
+	nodemigrations "github.com/status-im/mvds/node/migrations"
+	peersmigrations "github.com/status-im/mvds/peers/migrations"
+	statemigrations "github.com/status-im/mvds/state/migrations"
+	storemigrations "github.com/status-im/mvds/store/migrations"
+)
+
+type getter func(string) ([]byte, error)
+
+type Migration struct {
+	Names  []string
+	Getter func(name string) ([]byte, error)
+}
+
+func prepareMigrations(migrations []Migration) ([]string, getter, error) {
+	var allNames []string
+	nameToGetter := make(map[string]getter)
+
+	for _, m := range migrations {
+		for _, name := range m.Names {
+			if !validateName(name) {
+				continue
+			}
+
+			if _, ok := nameToGetter[name]; ok {
+				return nil, nil, errors.Errorf("migration with name %s already exists", name)
+			}
+			allNames = append(allNames, name)
+			nameToGetter[name] = m.Getter
+		}
+	}
+
+	return allNames, func(name string) ([]byte, error) {
+		getter, ok := nameToGetter[name]
+		if !ok {
+			return nil, errors.Errorf("no migration for name %s", name)
+		}
+		return getter(name)
+	}, nil
+}
+
+// DefaultMigrations is a collection of all mvds components migrations.
+var DefaultMigrations = []Migration{
+	{
+		Names:  nodemigrations.AssetNames(),
+		Getter: nodemigrations.Asset,
+	},
+	{
+		Names:  peersmigrations.AssetNames(),
+		Getter: peersmigrations.Asset,
+	},
+	{
+		Names:  statemigrations.AssetNames(),
+		Getter: statemigrations.Asset,
+	},
+	{
+		Names:  storemigrations.AssetNames(),
+		Getter: storemigrations.Asset,
+	},
+}
+
+// validateName verifies that only *.sql files are taken into consideration.
+func validateName(name string) bool {
+	return strings.HasSuffix(name, ".sql")
+}

vendor/github.com/status-im/mvds/persistenceutil/sqlite.go

@@ -0,0 +1,124 @@
+package persistenceutil
+
+import (
+	"database/sql"
+	"fmt"
+	"os"
+
+	"github.com/pkg/errors"
+	"github.com/status-im/migrate/v4"
+	"github.com/status-im/migrate/v4/database/sqlcipher"
+	bindata "github.com/status-im/migrate/v4/source/go_bindata"
+)
+
+// The reduced number of kdf iterations (for performance reasons) which is
+// currently used for derivation of the database key
+// https://github.com/status-im/status-go/pull/1343
+// https://notes.status.im/i8Y_l7ccTiOYq09HVgoFwA
+const reducedKdfIterationsNumber = 3200
+
+// MigrationConfig is a struct that allows to define bindata migrations.
+type MigrationConfig struct {
+	AssetNames  []string
+	AssetGetter func(name string) ([]byte, error)
+}
+
+// Migrate migrates a provided sqldb
+func Migrate(db *sql.DB) error {
+	assetNames, assetGetter, err := prepareMigrations(DefaultMigrations)
+	if err != nil {
+		return err
+	}
+	return ApplyMigrations(db, assetNames, assetGetter)
+
+}
+
+// Open opens or initializes a new database for a given file path.
+// MigrationConfig is optional but if provided migrations are applied automatically.
+func Open(path, key string, mc ...MigrationConfig) (*sql.DB, error) {
+	return open(path, key, reducedKdfIterationsNumber, mc)
+}
+
+// OpenWithIter allows to open a new database with a custom number of kdf iterations.
+// Higher kdf iterations number makes it slower to open the database.
+func OpenWithIter(path, key string, kdfIter int, mc ...MigrationConfig) (*sql.DB, error) {
+	return open(path, key, kdfIter, mc)
+}
+
+func open(path string, key string, kdfIter int, configs []MigrationConfig) (*sql.DB, error) {
+	_, err := os.OpenFile(path, os.O_CREATE, 0644)
+	if err != nil {
+		return nil, err
+	}
+
+	db, err := sql.Open("sqlite3", path)
+	if err != nil {
+		return nil, err
+	}
+
+	keyString := fmt.Sprintf("PRAGMA key = '%s'", key)
+
+	// Disable concurrent access as not supported by the driver
+	db.SetMaxOpenConns(1)
+
+	if _, err = db.Exec("PRAGMA foreign_keys=ON"); err != nil {
+		return nil, err
+	}
+
+	if _, err = db.Exec(keyString); err != nil {
+		return nil, err
+	}
+
+	kdfString := fmt.Sprintf("PRAGMA kdf_iter = '%d'", kdfIter)
+
+	if _, err = db.Exec(kdfString); err != nil {
+		return nil, err
+	}
+
+	// Apply all provided migrations.
+	for _, mc := range configs {
+		if err := ApplyMigrations(db, mc.AssetNames, mc.AssetGetter); err != nil {
+			return nil, err
+		}
+	}
+
+	return db, nil
+}
+
+// ApplyMigrations allows to apply bindata migrations on the current *sql.DB.
+// `assetNames` is a list of assets with migrations and `assetGetter` is responsible
+// for returning the content of the asset with a given name.
+func ApplyMigrations(db *sql.DB, assetNames []string, assetGetter func(name string) ([]byte, error)) error {
+	resources := bindata.Resource(
+		assetNames,
+		assetGetter,
+	)
+
+	source, err := bindata.WithInstance(resources)
+	if err != nil {
+		return errors.Wrap(err, "failed to create migration source")
+	}
+
+	driver, err := sqlcipher.WithInstance(db, &sqlcipher.Config{
+		MigrationsTable: "mvds_" + sqlcipher.DefaultMigrationsTable,
+	})
+	if err != nil {
+		return errors.Wrap(err, "failed to create driver")
+	}
+
+	m, err := migrate.NewWithInstance(
+		"go-bindata",
+		source,
+		"sqlcipher",
+		driver,
+	)
+	if err != nil {
+		return errors.Wrap(err, "failed to create migration instance")
+	}
+
+	if err = m.Up(); err != migrate.ErrNoChange {
+		return errors.Wrap(err, "failed to migrate")
+	}
+
+	return nil
+}

vendor/github.com/status-im/mvds/protobuf/messageid.go

@@ -0,0 +1,20 @@
+package protobuf
+
+import (
+	"crypto/sha256"
+	"encoding/binary"
+
+	"github.com/status-im/mvds/state"
+)
+
+// ID creates the MessageID for a Message
+func (m Message) ID() state.MessageID {
+	t := make([]byte, 8)
+	binary.LittleEndian.PutUint64(t, uint64(m.Timestamp))
+
+	b := append([]byte("MESSAGE_ID"), m.GroupId[:]...)
+	b = append(b, t...)
+	b = append(b, m.Body...)
+
+	return sha256.Sum256(b)
+}

vendor/github.com/status-im/mvds/protobuf/payload.go

@@ -0,0 +1,7 @@
+package protobuf
+
+// IsValid checks whether there are any known field in the protobuf
+// message
+func (m *Payload) IsValid() bool {
+	return len(m.Messages)+len(m.Acks)+len(m.Offers)+len(m.Requests)+len(m.GroupOffers) != 0
+}

vendor/github.com/status-im/mvds/protobuf/service.go

@@ -0,0 +1,3 @@
+package protobuf
+
+//go:generate protoc --go_out=. ./sync.proto

vendor/github.com/status-im/mvds/protobuf/sync.pb.go

@@ -0,0 +1,338 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.29.1
+// 	protoc        v3.21.12
+// source: sync.proto
+
+package protobuf
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type Offer struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	GroupId    []byte   `protobuf:"bytes,1,opt,name=group_id,json=groupId,proto3" json:"group_id,omitempty"`
+	MessageIds [][]byte `protobuf:"bytes,2,rep,name=message_ids,json=messageIds,proto3" json:"message_ids,omitempty"`
+}
+
+func (x *Offer) Reset() {
+	*x = Offer{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_sync_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Offer) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Offer) ProtoMessage() {}
+
+func (x *Offer) ProtoReflect() protoreflect.Message {
+	mi := &file_sync_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Offer.ProtoReflect.Descriptor instead.
+func (*Offer) Descriptor() ([]byte, []int) {
+	return file_sync_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Offer) GetGroupId() []byte {
+	if x != nil {
+		return x.GroupId
+	}
+	return nil
+}
+
+func (x *Offer) GetMessageIds() [][]byte {
+	if x != nil {
+		return x.MessageIds
+	}
+	return nil
+}
+
+type Payload struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Acks        [][]byte   `protobuf:"bytes,5001,rep,name=acks,proto3" json:"acks,omitempty"`
+	Offers      [][]byte   `protobuf:"bytes,5002,rep,name=offers,proto3" json:"offers,omitempty"`
+	Requests    [][]byte   `protobuf:"bytes,5003,rep,name=requests,proto3" json:"requests,omitempty"`
+	Messages    []*Message `protobuf:"bytes,5004,rep,name=messages,proto3" json:"messages,omitempty"`
+	GroupOffers []*Offer   `protobuf:"bytes,5005,rep,name=group_offers,json=groupOffers,proto3" json:"group_offers,omitempty"`
+}
+
+func (x *Payload) Reset() {
+	*x = Payload{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_sync_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Payload) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Payload) ProtoMessage() {}
+
+func (x *Payload) ProtoReflect() protoreflect.Message {
+	mi := &file_sync_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Payload.ProtoReflect.Descriptor instead.
+func (*Payload) Descriptor() ([]byte, []int) {
+	return file_sync_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *Payload) GetAcks() [][]byte {
+	if x != nil {
+		return x.Acks
+	}
+	return nil
+}
+
+func (x *Payload) GetOffers() [][]byte {
+	if x != nil {
+		return x.Offers
+	}
+	return nil
+}
+
+func (x *Payload) GetRequests() [][]byte {
+	if x != nil {
+		return x.Requests
+	}
+	return nil
+}
+
+func (x *Payload) GetMessages() []*Message {
+	if x != nil {
+		return x.Messages
+	}
+	return nil
+}
+
+func (x *Payload) GetGroupOffers() []*Offer {
+	if x != nil {
+		return x.GroupOffers
+	}
+	return nil
+}
+
+type Message struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	GroupId   []byte `protobuf:"bytes,6001,opt,name=group_id,json=groupId,proto3" json:"group_id,omitempty"`
+	Timestamp int64  `protobuf:"varint,6002,opt,name=timestamp,proto3" json:"timestamp,omitempty"`
+	Body      []byte `protobuf:"bytes,6003,opt,name=body,proto3" json:"body,omitempty"`
+}
+
+func (x *Message) Reset() {
+	*x = Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_sync_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Message) ProtoMessage() {}
+
+func (x *Message) ProtoReflect() protoreflect.Message {
+	mi := &file_sync_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Message.ProtoReflect.Descriptor instead.
+func (*Message) Descriptor() ([]byte, []int) {
+	return file_sync_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *Message) GetGroupId() []byte {
+	if x != nil {
+		return x.GroupId
+	}
+	return nil
+}
+
+func (x *Message) GetTimestamp() int64 {
+	if x != nil {
+		return x.Timestamp
+	}
+	return 0
+}
+
+func (x *Message) GetBody() []byte {
+	if x != nil {
+		return x.Body
+	}
+	return nil
+}
+
+var File_sync_proto protoreflect.FileDescriptor
+
+var file_sync_proto_rawDesc = []byte{
+	0x0a, 0x0a, 0x73, 0x79, 0x6e, 0x63, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x04, 0x6d, 0x76,
+	0x64, 0x73, 0x22, 0x43, 0x0a, 0x05, 0x4f, 0x66, 0x66, 0x65, 0x72, 0x12, 0x19, 0x0a, 0x08, 0x67,
+	0x72, 0x6f, 0x75, 0x70, 0x5f, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x07, 0x67,
+	0x72, 0x6f, 0x75, 0x70, 0x49, 0x64, 0x12, 0x1f, 0x0a, 0x0b, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67,
+	0x65, 0x5f, 0x69, 0x64, 0x73, 0x18, 0x02, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x0a, 0x6d, 0x65, 0x73,
+	0x73, 0x61, 0x67, 0x65, 0x49, 0x64, 0x73, 0x22, 0xb1, 0x01, 0x0a, 0x07, 0x50, 0x61, 0x79, 0x6c,
+	0x6f, 0x61, 0x64, 0x12, 0x13, 0x0a, 0x04, 0x61, 0x63, 0x6b, 0x73, 0x18, 0x89, 0x27, 0x20, 0x03,
+	0x28, 0x0c, 0x52, 0x04, 0x61, 0x63, 0x6b, 0x73, 0x12, 0x17, 0x0a, 0x06, 0x6f, 0x66, 0x66, 0x65,
+	0x72, 0x73, 0x18, 0x8a, 0x27, 0x20, 0x03, 0x28, 0x0c, 0x52, 0x06, 0x6f, 0x66, 0x66, 0x65, 0x72,
+	0x73, 0x12, 0x1b, 0x0a, 0x08, 0x72, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x73, 0x18, 0x8b, 0x27,
+	0x20, 0x03, 0x28, 0x0c, 0x52, 0x08, 0x72, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x73, 0x12, 0x2a,
+	0x0a, 0x08, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x18, 0x8c, 0x27, 0x20, 0x03, 0x28,
+	0x0b, 0x32, 0x0d, 0x2e, 0x6d, 0x76, 0x64, 0x73, 0x2e, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65,
+	0x52, 0x08, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x12, 0x2f, 0x0a, 0x0c, 0x67, 0x72,
+	0x6f, 0x75, 0x70, 0x5f, 0x6f, 0x66, 0x66, 0x65, 0x72, 0x73, 0x18, 0x8d, 0x27, 0x20, 0x03, 0x28,
+	0x0b, 0x32, 0x0b, 0x2e, 0x6d, 0x76, 0x64, 0x73, 0x2e, 0x4f, 0x66, 0x66, 0x65, 0x72, 0x52, 0x0b,
+	0x67, 0x72, 0x6f, 0x75, 0x70, 0x4f, 0x66, 0x66, 0x65, 0x72, 0x73, 0x22, 0x59, 0x0a, 0x07, 0x4d,
+	0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x12, 0x1a, 0x0a, 0x08, 0x67, 0x72, 0x6f, 0x75, 0x70, 0x5f,
+	0x69, 0x64, 0x18, 0xf1, 0x2e, 0x20, 0x01, 0x28, 0x0c, 0x52, 0x07, 0x67, 0x72, 0x6f, 0x75, 0x70,
+	0x49, 0x64, 0x12, 0x1d, 0x0a, 0x09, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x18,
+	0xf2, 0x2e, 0x20, 0x01, 0x28, 0x03, 0x52, 0x09, 0x74, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d,
+	0x70, 0x12, 0x13, 0x0a, 0x04, 0x62, 0x6f, 0x64, 0x79, 0x18, 0xf3, 0x2e, 0x20, 0x01, 0x28, 0x0c,
+	0x52, 0x04, 0x62, 0x6f, 0x64, 0x79, 0x42, 0x0d, 0x5a, 0x0b, 0x2e, 0x2f, 0x3b, 0x70, 0x72, 0x6f,
+	0x74, 0x6f, 0x62, 0x75, 0x66, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_sync_proto_rawDescOnce sync.Once
+	file_sync_proto_rawDescData = file_sync_proto_rawDesc
+)
+
+func file_sync_proto_rawDescGZIP() []byte {
+	file_sync_proto_rawDescOnce.Do(func() {
+		file_sync_proto_rawDescData = protoimpl.X.CompressGZIP(file_sync_proto_rawDescData)
+	})
+	return file_sync_proto_rawDescData
+}
+
+var file_sync_proto_msgTypes = make([]protoimpl.MessageInfo, 3)
+var file_sync_proto_goTypes = []interface{}{
+	(*Offer)(nil),   // 0: mvds.Offer
+	(*Payload)(nil), // 1: mvds.Payload
+	(*Message)(nil), // 2: mvds.Message
+}
+var file_sync_proto_depIdxs = []int32{
+	2, // 0: mvds.Payload.messages:type_name -> mvds.Message
+	0, // 1: mvds.Payload.group_offers:type_name -> mvds.Offer
+	2, // [2:2] is the sub-list for method output_type
+	2, // [2:2] is the sub-list for method input_type
+	2, // [2:2] is the sub-list for extension type_name
+	2, // [2:2] is the sub-list for extension extendee
+	0, // [0:2] is the sub-list for field type_name
+}
+
+func init() { file_sync_proto_init() }
+func file_sync_proto_init() {
+	if File_sync_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_sync_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Offer); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_sync_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Payload); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_sync_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_sync_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   3,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_sync_proto_goTypes,
+		DependencyIndexes: file_sync_proto_depIdxs,
+		MessageInfos:      file_sync_proto_msgTypes,
+	}.Build()
+	File_sync_proto = out.File
+	file_sync_proto_rawDesc = nil
+	file_sync_proto_goTypes = nil
+	file_sync_proto_depIdxs = nil
+}

vendor/github.com/status-im/mvds/protobuf/sync.proto

@@ -0,0 +1,23 @@
+syntax = "proto3";
+
+package mvds;
+option go_package = "./;protobuf";
+
+message Offer {
+  bytes group_id = 1;
+  repeated bytes message_ids = 2;
+}
+
+message Payload {
+  repeated bytes acks = 5001;
+  repeated bytes offers = 5002;
+  repeated bytes requests = 5003;
+  repeated Message messages = 5004;
+  repeated Offer group_offers = 5005;
+}
+
+message Message {
+  bytes group_id = 6001;
+  int64 timestamp = 6002;
+  bytes body = 6003;
+}

vendor/github.com/status-im/mvds/state/migrations/migrations.go

@@ -0,0 +1,321 @@
+// Code generated by go-bindata. DO NOT EDIT.
+// sources:
+// 1565341329_initial_schema.down.sql (24B)
+// 1565341329_initial_schema.up.sql (294B)
+// doc.go (377B)
+
+package migrations
+
+import (
+	"bytes"
+	"compress/gzip"
+	"crypto/sha256"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+func bindataRead(data []byte, name string) ([]byte, error) {
+	gz, err := gzip.NewReader(bytes.NewBuffer(data))
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %w", name, err)
+	}
+
+	var buf bytes.Buffer
+	_, err = io.Copy(&buf, gz)
+	clErr := gz.Close()
+
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %w", name, err)
+	}
+	if clErr != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+type asset struct {
+	bytes  []byte
+	info   os.FileInfo
+	digest [sha256.Size]byte
+}
+
+type bindataFileInfo struct {
+	name    string
+	size    int64
+	mode    os.FileMode
+	modTime time.Time
+}
+
+func (fi bindataFileInfo) Name() string {
+	return fi.name
+}
+func (fi bindataFileInfo) Size() int64 {
+	return fi.size
+}
+func (fi bindataFileInfo) Mode() os.FileMode {
+	return fi.mode
+}
+func (fi bindataFileInfo) ModTime() time.Time {
+	return fi.modTime
+}
+func (fi bindataFileInfo) IsDir() bool {
+	return false
+}
+func (fi bindataFileInfo) Sys() interface{} {
+	return nil
+}
+
+var __1565341329_initial_schemaDownSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x72\x09\xf2\x0f\x50\x08\x71\x74\xf2\x71\x55\xc8\x2d\x4b\x29\x8e\x2f\x2e\x49\x2c\x49\x2d\xb6\xe6\x02\x04\x00\x00\xff\xff\xb7\x43\xc1\xc1\x18\x00\x00\x00")
+
+func _1565341329_initial_schemaDownSqlBytes() ([]byte, error) {
+	return bindataRead(
+		__1565341329_initial_schemaDownSql,
+		"1565341329_initial_schema.down.sql",
+	)
+}
+
+func _1565341329_initial_schemaDownSql() (*asset, error) {
+	bytes, err := _1565341329_initial_schemaDownSqlBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "1565341329_initial_schema.down.sql", size: 24, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x20, 0x56, 0x1a, 0x0, 0xc5, 0x81, 0xb3, 0xeb, 0x2a, 0xae, 0xed, 0xbb, 0x68, 0x51, 0x68, 0xc7, 0xe3, 0x31, 0xe, 0x1, 0x3e, 0xd2, 0x85, 0x9e, 0x6d, 0x55, 0xad, 0x55, 0xd6, 0x2f, 0x29, 0xca}}
+	return a, nil
+}
+
+var __1565341329_initial_schemaUpSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x7c\x8f\xc1\x8a\x83\x30\x14\x45\xf7\xf9\x8a\xbb\x54\xf0\x0f\x5c\xe9\x4c\x18\x64\xd2\x58\x42\x0a\x75\x15\xc4\x3c\xac\x0b\x35\x98\x58\xda\xbf\x2f\xb4\x15\xa5\x60\xb7\xf7\x1c\x1e\xef\xfc\x28\x9e\x69\x0e\x9d\xe5\x82\xa3\xbf\x5a\x6f\x7c\xa8\x03\x79\x44\x0c\x00\xc2\xdd\x11\x0a\xa9\xf9\x1f\x57\x90\xa5\x86\x3c\x09\x91\x3c\x91\xa7\xc1\x9a\x66\x9c\x87\xf0\x4d\x20\x37\x36\x97\x1d\xa1\x9d\xc6\xd9\x99\xce\x22\x17\x65\xfe\x9a\x1c\xd1\xb4\x2c\x1f\x76\x4f\xde\xd7\x2d\xed\xd0\xa3\x2a\x0e\x99\xaa\xf0\xcf\x2b\x44\xab\x9a\x2c\x17\x63\x16\xa7\x8c\xbd\x6b\x0b\xf9\xcb\xcf\xe8\xec\xcd\x6c\x7e\x2c\xe5\xb6\x3f\x5a\x49\x9c\xb2\x47\x00\x00\x00\xff\xff\x5e\xe5\x72\x74\x26\x01\x00\x00")
+
+func _1565341329_initial_schemaUpSqlBytes() ([]byte, error) {
+	return bindataRead(
+		__1565341329_initial_schemaUpSql,
+		"1565341329_initial_schema.up.sql",
+	)
+}
+
+func _1565341329_initial_schemaUpSql() (*asset, error) {
+	bytes, err := _1565341329_initial_schemaUpSqlBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "1565341329_initial_schema.up.sql", size: 294, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x3e, 0xa5, 0x37, 0x9d, 0x3f, 0xf3, 0xc9, 0xc8, 0x12, 0x74, 0x79, 0x74, 0xff, 0xfd, 0xb1, 0x5f, 0x13, 0xaf, 0xf2, 0x50, 0x14, 0x9f, 0xdf, 0xc8, 0xc5, 0xa7, 0xc3, 0xf5, 0xa4, 0x8e, 0x8a, 0xf6}}
+	return a, nil
+}
+
+var _docGo = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x84\x8f\xbb\x6e\xc3\x30\x0c\x45\x77\x7f\xc5\x45\x96\x2c\xb5\xb4\x74\xea\xd6\xb1\x7b\x7f\x80\x91\x68\x89\x88\x1e\xae\x48\xe7\xf1\xf7\x85\xd3\x02\xcd\xd6\xf5\x00\xe7\xf0\xd2\x7b\x7c\x66\x51\x2c\x52\x18\xa2\x68\x1c\x58\x95\xc6\x1d\x27\x0e\xb4\x29\xe3\x90\xc4\xf2\x76\x72\xa1\x57\xaf\x46\xb6\xe9\x2c\xd5\x57\x49\x83\x8c\xfd\xe5\xf5\x30\x79\x8f\x40\xed\x68\xc8\xd4\x62\xe1\x47\x4b\xa1\x46\xc3\xa4\x25\x5c\xc5\x32\x08\xeb\xe0\x45\x6e\x0e\xef\x86\xc2\xa4\x06\xcb\x64\x47\x85\x65\x46\x20\xe5\x3d\xb3\xf4\x81\xd4\xe7\x93\xb4\x48\x46\x6e\x47\x1f\xcb\x13\xd9\x17\x06\x2a\x85\x23\x96\xd1\xeb\xc3\x55\xaa\x8c\x28\x83\x83\xf5\x71\x7f\x01\xa9\xb2\xa1\x51\x65\xdd\xfd\x4c\x17\x46\xeb\xbf\xe7\x41\x2d\xfe\xff\x11\xae\x7d\x9c\x15\xa4\xe0\xdb\xca\xc1\x38\xba\x69\x5a\x29\x9c\x29\x31\xf4\xab\x88\xf1\x34\x79\x9f\xfa\x5b\xe2\xc6\xbb\xf5\xbc\x71\x5e\xcf\x09\x3f\x35\xe9\x4d\x31\x77\x38\xe7\xff\x80\x4b\x1d\x6e\xfa\x0e\x00\x00\xff\xff\x9d\x60\x3d\x88\x79\x01\x00\x00")
+
+func docGoBytes() ([]byte, error) {
+	return bindataRead(
+		_docGo,
+		"doc.go",
+	)
+}
+
+func docGo() (*asset, error) {
+	bytes, err := docGoBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "doc.go", size: 377, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xef, 0xaf, 0xdf, 0xcf, 0x65, 0xae, 0x19, 0xfc, 0x9d, 0x29, 0xc1, 0x91, 0xaf, 0xb5, 0xd5, 0xb1, 0x56, 0xf3, 0xee, 0xa8, 0xba, 0x13, 0x65, 0xdb, 0xab, 0xcf, 0x4e, 0xac, 0x92, 0xe9, 0x60, 0xf1}}
+	return a, nil
+}
+
+// Asset loads and returns the asset for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func Asset(name string) ([]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
+		}
+		return a.bytes, nil
+	}
+	return nil, fmt.Errorf("Asset %s not found", name)
+}
+
+// AssetString returns the asset contents as a string (instead of a []byte).
+func AssetString(name string) (string, error) {
+	data, err := Asset(name)
+	return string(data), err
+}
+
+// MustAsset is like Asset but panics when Asset would return an error.
+// It simplifies safe initialization of global variables.
+func MustAsset(name string) []byte {
+	a, err := Asset(name)
+	if err != nil {
+		panic("asset: Asset(" + name + "): " + err.Error())
+	}
+
+	return a
+}
+
+// MustAssetString is like AssetString but panics when Asset would return an
+// error. It simplifies safe initialization of global variables.
+func MustAssetString(name string) string {
+	return string(MustAsset(name))
+}
+
+// AssetInfo loads and returns the asset info for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func AssetInfo(name string) (os.FileInfo, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
+		}
+		return a.info, nil
+	}
+	return nil, fmt.Errorf("AssetInfo %s not found", name)
+}
+
+// AssetDigest returns the digest of the file with the given name. It returns an
+// error if the asset could not be found or the digest could not be loaded.
+func AssetDigest(name string) ([sha256.Size]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s can't read by error: %v", name, err)
+		}
+		return a.digest, nil
+	}
+	return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s not found", name)
+}
+
+// Digests returns a map of all known files and their checksums.
+func Digests() (map[string][sha256.Size]byte, error) {
+	mp := make(map[string][sha256.Size]byte, len(_bindata))
+	for name := range _bindata {
+		a, err := _bindata[name]()
+		if err != nil {
+			return nil, err
+		}
+		mp[name] = a.digest
+	}
+	return mp, nil
+}
+
+// AssetNames returns the names of the assets.
+func AssetNames() []string {
+	names := make([]string, 0, len(_bindata))
+	for name := range _bindata {
+		names = append(names, name)
+	}
+	return names
+}
+
+// _bindata is a table, holding each asset generator, mapped to its name.
+var _bindata = map[string]func() (*asset, error){
+	"1565341329_initial_schema.down.sql": _1565341329_initial_schemaDownSql,
+	"1565341329_initial_schema.up.sql":   _1565341329_initial_schemaUpSql,
+	"doc.go":                             docGo,
+}
+
+// AssetDebug is true if the assets were built with the debug flag enabled.
+const AssetDebug = false
+
+// AssetDir returns the file names below a certain
+// directory embedded in the file by go-bindata.
+// For example if you run go-bindata on data/... and data contains the
+// following hierarchy:
+//
+//	data/
+//	  foo.txt
+//	  img/
+//	    a.png
+//	    b.png
+//
+// then AssetDir("data") would return []string{"foo.txt", "img"},
+// AssetDir("data/img") would return []string{"a.png", "b.png"},
+// AssetDir("foo.txt") and AssetDir("notexist") would return an error, and
+// AssetDir("") will return []string{"data"}.
+func AssetDir(name string) ([]string, error) {
+	node := _bintree
+	if len(name) != 0 {
+		canonicalName := strings.Replace(name, "\\", "/", -1)
+		pathList := strings.Split(canonicalName, "/")
+		for _, p := range pathList {
+			node = node.Children[p]
+			if node == nil {
+				return nil, fmt.Errorf("Asset %s not found", name)
+			}
+		}
+	}
+	if node.Func != nil {
+		return nil, fmt.Errorf("Asset %s not found", name)
+	}
+	rv := make([]string, 0, len(node.Children))
+	for childName := range node.Children {
+		rv = append(rv, childName)
+	}
+	return rv, nil
+}
+
+type bintree struct {
+	Func     func() (*asset, error)
+	Children map[string]*bintree
+}
+
+var _bintree = &bintree{nil, map[string]*bintree{
+	"1565341329_initial_schema.down.sql": {_1565341329_initial_schemaDownSql, map[string]*bintree{}},
+	"1565341329_initial_schema.up.sql":   {_1565341329_initial_schemaUpSql, map[string]*bintree{}},
+	"doc.go":                             {docGo, map[string]*bintree{}},
+}}
+
+// RestoreAsset restores an asset under the given directory.
+func RestoreAsset(dir, name string) error {
+	data, err := Asset(name)
+	if err != nil {
+		return err
+	}
+	info, err := AssetInfo(name)
+	if err != nil {
+		return err
+	}
+	err = os.MkdirAll(_filePath(dir, filepath.Dir(name)), os.FileMode(0755))
+	if err != nil {
+		return err
+	}
+	err = os.WriteFile(_filePath(dir, name), data, info.Mode())
+	if err != nil {
+		return err
+	}
+	return os.Chtimes(_filePath(dir, name), info.ModTime(), info.ModTime())
+}
+
+// RestoreAssets restores an asset under the given directory recursively.
+func RestoreAssets(dir, name string) error {
+	children, err := AssetDir(name)
+	// File
+	if err != nil {
+		return RestoreAsset(dir, name)
+	}
+	// Dir
+	for _, child := range children {
+		err = RestoreAssets(dir, filepath.Join(name, child))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func _filePath(dir, name string) string {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	return filepath.Join(append([]string{dir}, strings.Split(canonicalName, "/")...)...)
+}

vendor/github.com/status-im/mvds/state/peerid.go

@@ -0,0 +1,4 @@
+package state
+
+// PeerID is the ID for a specific peer.
+type PeerID [65]byte

vendor/github.com/status-im/mvds/state/state.go

@@ -0,0 +1,29 @@
+// Package state contains everything related to the synchronization state for MVDS.
+package state
+
+// RecordType is the type for a specific record, either `OFFER`, `REQUEST` or `MESSAGE`.
+type RecordType int
+
+const (
+	OFFER RecordType = iota
+	REQUEST
+	MESSAGE
+)
+
+// State is a struct used to store a records [state](https://github.com/status-im/bigbrother-specs/blob/master/data_sync/mvds.md#state).
+type State struct {
+	Type      RecordType
+	SendCount uint64
+	SendEpoch int64
+	// GroupID is optional, thus nullable
+	GroupID   *GroupID
+	PeerID    PeerID
+	MessageID MessageID
+}
+
+type SyncState interface {
+	Add(newState State) error
+	Remove(id MessageID, peer PeerID) error
+	All(epoch int64) ([]State, error)
+	Map(epoch int64, process func(State) State) error
+}

vendor/github.com/status-im/mvds/state/state_memory.go

@@ -0,0 +1,61 @@
+package state
+
+import (
+	"sync"
+)
+
+type memorySyncState struct {
+	sync.Mutex
+
+	state []State
+}
+
+func NewSyncState() *memorySyncState {
+	return &memorySyncState{}
+}
+
+func (s *memorySyncState) Add(newState State) error {
+	s.Lock()
+	defer s.Unlock()
+
+	s.state = append(s.state, newState)
+
+	return nil
+}
+
+func (s *memorySyncState) Remove(id MessageID, peer PeerID) error {
+	s.Lock()
+	defer s.Unlock()
+	var newState []State
+
+	for _, state := range s.state {
+		if state.MessageID != id || state.PeerID != peer {
+			newState = append(newState, state)
+		}
+	}
+
+	s.state = newState
+
+	return nil
+}
+
+func (s *memorySyncState) All(_ int64) ([]State, error) {
+	s.Lock()
+	defer s.Unlock()
+	return s.state, nil
+}
+
+func (s *memorySyncState) Map(epoch int64, process func(State) State) error {
+	s.Lock()
+	defer s.Unlock()
+
+	for i, state := range s.state {
+		if state.SendEpoch > epoch {
+			continue
+		}
+
+		s.state[i] = process(state)
+	}
+
+	return nil
+}

vendor/github.com/status-im/mvds/state/state_sqlite.go

@@ -0,0 +1,166 @@
+package state
+
+import (
+	"database/sql"
+	"errors"
+	"log"
+)
+
+var (
+	ErrStateNotFound = errors.New("state not found")
+)
+
+// Verify that SyncState interface is implemented.
+var _ SyncState = (*sqliteSyncState)(nil)
+
+type sqliteSyncState struct {
+	db *sql.DB
+}
+
+func NewPersistentSyncState(db *sql.DB) *sqliteSyncState {
+	return &sqliteSyncState{db: db}
+}
+
+func (p *sqliteSyncState) Add(newState State) error {
+	var groupIDBytes []byte
+	if newState.GroupID != nil {
+		groupIDBytes = newState.GroupID[:]
+	}
+
+	_, err := p.db.Exec(`
+		INSERT INTO mvds_states 
+			(type, send_count, send_epoch, group_id, peer_id, message_id) 
+		VALUES 
+			(?, ?, ?, ?, ?, ?)`,
+		newState.Type,
+		newState.SendCount,
+		newState.SendEpoch,
+		groupIDBytes,
+		newState.PeerID[:],
+		newState.MessageID[:],
+	)
+	return err
+}
+
+func (p *sqliteSyncState) Remove(messageID MessageID, peerID PeerID) error {
+	result, err := p.db.Exec(
+		`DELETE FROM mvds_states WHERE message_id = ? AND peer_id = ?`,
+		messageID[:],
+		peerID[:],
+	)
+	if err != nil {
+		return err
+	}
+	if n, err := result.RowsAffected(); err != nil {
+		return err
+	} else if n == 0 {
+		return ErrStateNotFound
+	}
+	return nil
+}
+
+func (p *sqliteSyncState) All(epoch int64) ([]State, error) {
+	var result []State
+
+	rows, err := p.db.Query(`
+		SELECT 
+			type, send_count, send_epoch, group_id, peer_id, message_id 
+		FROM
+			mvds_states
+		WHERE
+			send_epoch <= ?
+	`, epoch)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	for rows.Next() {
+		var (
+			state                      State
+			groupID, peerID, messageID []byte
+		)
+		err := rows.Scan(
+			&state.Type,
+			&state.SendCount,
+			&state.SendEpoch,
+			&groupID,
+			&peerID,
+			&messageID,
+		)
+		if err != nil {
+			return nil, err
+		}
+		if len(groupID) > 0 {
+			val := GroupID{}
+			copy(val[:], groupID)
+			state.GroupID = &val
+		}
+		copy(state.PeerID[:], peerID)
+		copy(state.MessageID[:], messageID)
+
+		result = append(result, state)
+	}
+
+	return result, nil
+}
+
+func (p *sqliteSyncState) Map(epoch int64, process func(State) State) error {
+	states, err := p.All(epoch)
+	if err != nil {
+		return err
+	}
+
+	var updated []State
+
+	for _, state := range states {
+		if err := invariant(state.SendEpoch <= epoch, "invalid state provided to process"); err != nil {
+			log.Printf("%v", err)
+			continue
+		}
+		newState := process(state)
+		if newState != state {
+			updated = append(updated, newState)
+		}
+	}
+
+	if len(updated) == 0 {
+		return nil
+	}
+
+	tx, err := p.db.Begin()
+	if err != nil {
+		return err
+	}
+	for _, state := range updated {
+		if err := updateInTx(tx, state); err != nil {
+			_ = tx.Rollback()
+			return err
+		}
+	}
+	return tx.Commit()
+}
+
+func updateInTx(tx *sql.Tx, state State) error {
+	_, err := tx.Exec(`
+		UPDATE mvds_states
+		SET 
+			 send_count = ?,
+			 send_epoch = ?
+		WHERE
+			message_id = ? AND 
+			peer_id = ?
+		`,
+		state.SendCount,
+		state.SendEpoch,
+		state.MessageID[:],
+		state.PeerID[:],
+	)
+	return err
+}
+
+func invariant(cond bool, message string) error {
+	if !cond {
+		return errors.New(message)
+	}
+	return nil
+}

vendor/github.com/status-im/mvds/state/sync_types.go

@@ -0,0 +1,4 @@
+package state
+
+type MessageID [32]byte
+type GroupID [32]byte

vendor/github.com/status-im/mvds/store/messagestore.go

@@ -0,0 +1,13 @@
+// Package store contains everything storage related for MVDS.
+package store
+
+import (
+	"github.com/status-im/mvds/protobuf"
+	"github.com/status-im/mvds/state"
+)
+
+type MessageStore interface {
+	Has(id state.MessageID) (bool, error)
+	Get(id state.MessageID) (*protobuf.Message, error)
+	Add(message *protobuf.Message) error
+}

vendor/github.com/status-im/mvds/store/messagestore_dummy.go

@@ -0,0 +1,45 @@
+package store
+
+import (
+	"errors"
+	"sync"
+
+	"github.com/status-im/mvds/protobuf"
+	"github.com/status-im/mvds/state"
+)
+
+type DummyStore struct {
+	sync.Mutex
+	ms map[state.MessageID]*protobuf.Message
+}
+
+func NewDummyStore() *DummyStore {
+	return &DummyStore{ms: make(map[state.MessageID]*protobuf.Message)}
+}
+
+func (ds *DummyStore) Has(id state.MessageID) (bool, error) {
+	ds.Lock()
+	defer ds.Unlock()
+
+	_, ok := ds.ms[id]
+	return ok, nil
+}
+
+func (ds *DummyStore) Get(id state.MessageID) (*protobuf.Message, error) {
+	ds.Lock()
+	defer ds.Unlock()
+
+	m, ok := ds.ms[id]
+	if !ok {
+		return nil, errors.New("message does not exist")
+	}
+
+	return m, nil
+}
+
+func (ds *DummyStore) Add(message *protobuf.Message) error {
+	ds.Lock()
+	defer ds.Unlock()
+	ds.ms[message.ID()] = message
+	return nil
+}

vendor/github.com/status-im/mvds/store/messagestore_sqlite.go

@@ -0,0 +1,67 @@
+package store
+
+import (
+	"database/sql"
+	"errors"
+
+	"github.com/status-im/mvds/state"
+
+	"github.com/status-im/mvds/protobuf"
+)
+
+var (
+	ErrMessageNotFound = errors.New("message not found")
+)
+
+type persistentMessageStore struct {
+	db *sql.DB
+}
+
+func NewPersistentMessageStore(db *sql.DB) *persistentMessageStore {
+	return &persistentMessageStore{db: db}
+}
+
+func (p *persistentMessageStore) Add(message *protobuf.Message) error {
+	id := message.ID()
+	_, err := p.db.Exec(
+		`INSERT INTO mvds_messages (id, group_id, timestamp, body)
+		VALUES (?, ?, ?, ?)`,
+		id[:],
+		message.GroupId,
+		message.Timestamp,
+		message.Body,
+	)
+	return err
+}
+
+func (p *persistentMessageStore) Get(id state.MessageID) (*protobuf.Message, error) {
+	var message protobuf.Message
+	row := p.db.QueryRow(
+		`SELECT group_id, timestamp, body FROM mvds_messages WHERE id = ?`,
+		id[:],
+	)
+	if err := row.Scan(
+		&message.GroupId,
+		&message.Timestamp,
+		&message.Body,
+	); err != nil {
+		return nil, err
+	}
+	return &message, nil
+}
+
+func (p *persistentMessageStore) Has(id state.MessageID) (bool, error) {
+	var result bool
+	err := p.db.QueryRow(
+		`SELECT EXISTS(SELECT 1 FROM mvds_messages WHERE id = ?)`,
+		id[:],
+	).Scan(&result)
+	switch err {
+	case sql.ErrNoRows:
+		return false, ErrMessageNotFound
+	case nil:
+		return result, nil
+	default:
+		return false, err
+	}
+}

vendor/github.com/status-im/mvds/store/migrations/migrations.go

@@ -0,0 +1,321 @@
+// Code generated by go-bindata. DO NOT EDIT.
+// sources:
+// 1565447861_initial_schema.down.sql (28B)
+// 1565447861_initial_schema.up.sql (140B)
+// doc.go (377B)
+
+package migrations
+
+import (
+	"bytes"
+	"compress/gzip"
+	"crypto/sha256"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+func bindataRead(data []byte, name string) ([]byte, error) {
+	gz, err := gzip.NewReader(bytes.NewBuffer(data))
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %w", name, err)
+	}
+
+	var buf bytes.Buffer
+	_, err = io.Copy(&buf, gz)
+	clErr := gz.Close()
+
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %w", name, err)
+	}
+	if clErr != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+type asset struct {
+	bytes  []byte
+	info   os.FileInfo
+	digest [sha256.Size]byte
+}
+
+type bindataFileInfo struct {
+	name    string
+	size    int64
+	mode    os.FileMode
+	modTime time.Time
+}
+
+func (fi bindataFileInfo) Name() string {
+	return fi.name
+}
+func (fi bindataFileInfo) Size() int64 {
+	return fi.size
+}
+func (fi bindataFileInfo) Mode() os.FileMode {
+	return fi.mode
+}
+func (fi bindataFileInfo) ModTime() time.Time {
+	return fi.modTime
+}
+func (fi bindataFileInfo) IsDir() bool {
+	return false
+}
+func (fi bindataFileInfo) Sys() interface{} {
+	return nil
+}
+
+var __1565447861_initial_schemaDownSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x72\x71\xf5\x71\x0d\x71\x55\x08\x71\x74\xf2\x71\x55\xc8\x2d\x4b\x29\x8e\xcf\x4d\x2d\x2e\x4e\x4c\x4f\x2d\xb6\xe6\x02\x04\x00\x00\xff\xff\xc2\x3a\x18\x9b\x1c\x00\x00\x00")
+
+func _1565447861_initial_schemaDownSqlBytes() ([]byte, error) {
+	return bindataRead(
+		__1565447861_initial_schemaDownSql,
+		"1565447861_initial_schema.down.sql",
+	)
+}
+
+func _1565447861_initial_schemaDownSql() (*asset, error) {
+	bytes, err := _1565447861_initial_schemaDownSqlBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "1565447861_initial_schema.down.sql", size: 28, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x92, 0x55, 0x8d, 0x3, 0x68, 0x1a, 0x9c, 0xd7, 0xc7, 0xb4, 0x5a, 0xb1, 0x27, 0x47, 0xf4, 0xc6, 0x8d, 0x85, 0xbb, 0xae, 0xb6, 0x69, 0xc5, 0xbc, 0x21, 0xba, 0xc0, 0xc6, 0x2a, 0xc8, 0xb2, 0xf7}}
+	return a, nil
+}
+
+var __1565447861_initial_schemaUpSql = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x72\x0e\x72\x75\x0c\x71\x55\x08\x71\x74\xf2\x71\x55\xc8\x2d\x4b\x29\x8e\xcf\x4d\x2d\x2e\x4e\x4c\x4f\x2d\x56\xd0\xe0\x52\x50\x50\x50\xc8\x4c\x51\x70\xf2\xf1\x77\x52\x08\x08\xf2\xf4\x75\x0c\x8a\x54\xf0\x76\x8d\xd4\x01\x4b\xa4\x17\xe5\x97\x16\xc4\xc3\xa4\xfd\xfc\x43\x14\xfc\x42\x7d\x7c\x20\x72\x25\x99\xb9\xa9\xc5\x25\x89\xb9\x05\x0a\x9e\x7e\x21\xae\xee\xae\x41\x68\xf2\x49\xf9\x29\x95\xa8\xfa\xb8\x34\xad\xb9\x00\x01\x00\x00\xff\xff\xae\x9b\x57\x51\x8c\x00\x00\x00")
+
+func _1565447861_initial_schemaUpSqlBytes() ([]byte, error) {
+	return bindataRead(
+		__1565447861_initial_schemaUpSql,
+		"1565447861_initial_schema.up.sql",
+	)
+}
+
+func _1565447861_initial_schemaUpSql() (*asset, error) {
+	bytes, err := _1565447861_initial_schemaUpSqlBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "1565447861_initial_schema.up.sql", size: 140, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x21, 0x13, 0xbf, 0x64, 0x18, 0xf7, 0xe2, 0xd8, 0xb5, 0x7d, 0x8, 0xf1, 0x66, 0xb9, 0xb3, 0x49, 0x68, 0xe2, 0xa2, 0xea, 0x90, 0x11, 0x70, 0x9c, 0x15, 0x28, 0x3f, 0x3f, 0x90, 0x3c, 0x76, 0xf}}
+	return a, nil
+}
+
+var _docGo = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x84\x8f\xbb\x6e\xc3\x30\x0c\x45\x77\x7f\xc5\x45\x96\x2c\xb5\xb4\x74\xea\xd6\xb1\x7b\x7f\x80\x91\x68\x89\x88\x1e\xae\x48\xe7\xf1\xf7\x85\xd3\x02\xcd\xd6\xf5\x00\xe7\xf0\xd2\x7b\x7c\x66\x51\x2c\x52\x18\xa2\x68\x1c\x58\x95\xc6\x1d\x27\x0e\xb4\x29\xe3\x90\xc4\xf2\x76\x72\xa1\x57\xaf\x46\xb6\xe9\x2c\xd5\x57\x49\x83\x8c\xfd\xe5\xf5\x30\x79\x8f\x40\xed\x68\xc8\xd4\x62\xe1\x47\x4b\xa1\x46\xc3\xa4\x25\x5c\xc5\x32\x08\xeb\xe0\x45\x6e\x0e\xef\x86\xc2\xa4\x06\xcb\x64\x47\x85\x65\x46\x20\xe5\x3d\xb3\xf4\x81\xd4\xe7\x93\xb4\x48\x46\x6e\x47\x1f\xcb\x13\xd9\x17\x06\x2a\x85\x23\x96\xd1\xeb\xc3\x55\xaa\x8c\x28\x83\x83\xf5\x71\x7f\x01\xa9\xb2\xa1\x51\x65\xdd\xfd\x4c\x17\x46\xeb\xbf\xe7\x41\x2d\xfe\xff\x11\xae\x7d\x9c\x15\xa4\xe0\xdb\xca\xc1\x38\xba\x69\x5a\x29\x9c\x29\x31\xf4\xab\x88\xf1\x34\x79\x9f\xfa\x5b\xe2\xc6\xbb\xf5\xbc\x71\x5e\xcf\x09\x3f\x35\xe9\x4d\x31\x77\x38\xe7\xff\x80\x4b\x1d\x6e\xfa\x0e\x00\x00\xff\xff\x9d\x60\x3d\x88\x79\x01\x00\x00")
+
+func docGoBytes() ([]byte, error) {
+	return bindataRead(
+		_docGo,
+		"doc.go",
+	)
+}
+
+func docGo() (*asset, error) {
+	bytes, err := docGoBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "doc.go", size: 377, mode: os.FileMode(0644), modTime: time.Unix(1704726726, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xef, 0xaf, 0xdf, 0xcf, 0x65, 0xae, 0x19, 0xfc, 0x9d, 0x29, 0xc1, 0x91, 0xaf, 0xb5, 0xd5, 0xb1, 0x56, 0xf3, 0xee, 0xa8, 0xba, 0x13, 0x65, 0xdb, 0xab, 0xcf, 0x4e, 0xac, 0x92, 0xe9, 0x60, 0xf1}}
+	return a, nil
+}
+
+// Asset loads and returns the asset for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func Asset(name string) ([]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
+		}
+		return a.bytes, nil
+	}
+	return nil, fmt.Errorf("Asset %s not found", name)
+}
+
+// AssetString returns the asset contents as a string (instead of a []byte).
+func AssetString(name string) (string, error) {
+	data, err := Asset(name)
+	return string(data), err
+}
+
+// MustAsset is like Asset but panics when Asset would return an error.
+// It simplifies safe initialization of global variables.
+func MustAsset(name string) []byte {
+	a, err := Asset(name)
+	if err != nil {
+		panic("asset: Asset(" + name + "): " + err.Error())
+	}
+
+	return a
+}
+
+// MustAssetString is like AssetString but panics when Asset would return an
+// error. It simplifies safe initialization of global variables.
+func MustAssetString(name string) string {
+	return string(MustAsset(name))
+}
+
+// AssetInfo loads and returns the asset info for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func AssetInfo(name string) (os.FileInfo, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
+		}
+		return a.info, nil
+	}
+	return nil, fmt.Errorf("AssetInfo %s not found", name)
+}
+
+// AssetDigest returns the digest of the file with the given name. It returns an
+// error if the asset could not be found or the digest could not be loaded.
+func AssetDigest(name string) ([sha256.Size]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s can't read by error: %v", name, err)
+		}
+		return a.digest, nil
+	}
+	return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s not found", name)
+}
+
+// Digests returns a map of all known files and their checksums.
+func Digests() (map[string][sha256.Size]byte, error) {
+	mp := make(map[string][sha256.Size]byte, len(_bindata))
+	for name := range _bindata {
+		a, err := _bindata[name]()
+		if err != nil {
+			return nil, err
+		}
+		mp[name] = a.digest
+	}
+	return mp, nil
+}
+
+// AssetNames returns the names of the assets.
+func AssetNames() []string {
+	names := make([]string, 0, len(_bindata))
+	for name := range _bindata {
+		names = append(names, name)
+	}
+	return names
+}
+
+// _bindata is a table, holding each asset generator, mapped to its name.
+var _bindata = map[string]func() (*asset, error){
+	"1565447861_initial_schema.down.sql": _1565447861_initial_schemaDownSql,
+	"1565447861_initial_schema.up.sql":   _1565447861_initial_schemaUpSql,
+	"doc.go":                             docGo,
+}
+
+// AssetDebug is true if the assets were built with the debug flag enabled.
+const AssetDebug = false
+
+// AssetDir returns the file names below a certain
+// directory embedded in the file by go-bindata.
+// For example if you run go-bindata on data/... and data contains the
+// following hierarchy:
+//
+//	data/
+//	  foo.txt
+//	  img/
+//	    a.png
+//	    b.png
+//
+// then AssetDir("data") would return []string{"foo.txt", "img"},
+// AssetDir("data/img") would return []string{"a.png", "b.png"},
+// AssetDir("foo.txt") and AssetDir("notexist") would return an error, and
+// AssetDir("") will return []string{"data"}.
+func AssetDir(name string) ([]string, error) {
+	node := _bintree
+	if len(name) != 0 {
+		canonicalName := strings.Replace(name, "\\", "/", -1)
+		pathList := strings.Split(canonicalName, "/")
+		for _, p := range pathList {
+			node = node.Children[p]
+			if node == nil {
+				return nil, fmt.Errorf("Asset %s not found", name)
+			}
+		}
+	}
+	if node.Func != nil {
+		return nil, fmt.Errorf("Asset %s not found", name)
+	}
+	rv := make([]string, 0, len(node.Children))
+	for childName := range node.Children {
+		rv = append(rv, childName)
+	}
+	return rv, nil
+}
+
+type bintree struct {
+	Func     func() (*asset, error)
+	Children map[string]*bintree
+}
+
+var _bintree = &bintree{nil, map[string]*bintree{
+	"1565447861_initial_schema.down.sql": {_1565447861_initial_schemaDownSql, map[string]*bintree{}},
+	"1565447861_initial_schema.up.sql":   {_1565447861_initial_schemaUpSql, map[string]*bintree{}},
+	"doc.go":                             {docGo, map[string]*bintree{}},
+}}
+
+// RestoreAsset restores an asset under the given directory.
+func RestoreAsset(dir, name string) error {
+	data, err := Asset(name)
+	if err != nil {
+		return err
+	}
+	info, err := AssetInfo(name)
+	if err != nil {
+		return err
+	}
+	err = os.MkdirAll(_filePath(dir, filepath.Dir(name)), os.FileMode(0755))
+	if err != nil {
+		return err
+	}
+	err = os.WriteFile(_filePath(dir, name), data, info.Mode())
+	if err != nil {
+		return err
+	}
+	return os.Chtimes(_filePath(dir, name), info.ModTime(), info.ModTime())
+}
+
+// RestoreAssets restores an asset under the given directory recursively.
+func RestoreAssets(dir, name string) error {
+	children, err := AssetDir(name)
+	// File
+	if err != nil {
+		return RestoreAsset(dir, name)
+	}
+	// Dir
+	for _, child := range children {
+		err = RestoreAssets(dir, filepath.Join(name, child))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func _filePath(dir, name string) string {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	return filepath.Join(append([]string{dir}, strings.Split(canonicalName, "/")...)...)
+}

vendor/github.com/status-im/mvds/transport/channel_transport.go

@@ -0,0 +1,54 @@
+package transport
+
+import (
+	"errors"
+	math "math/rand"
+	"sync"
+	"time"
+
+	"github.com/status-im/mvds/protobuf"
+	"github.com/status-im/mvds/state"
+)
+
+// ChannelTransport implements a basic MVDS transport using channels for basic testing purposes.
+type ChannelTransport struct {
+	sync.Mutex
+
+	offline int
+
+	in  <-chan Packet
+	out map[state.PeerID]chan<- Packet
+}
+
+func NewChannelTransport(offline int, in <-chan Packet) *ChannelTransport {
+	return &ChannelTransport{
+		offline: offline,
+		in:      in,
+		out:     make(map[state.PeerID]chan<- Packet),
+	}
+}
+
+func (t *ChannelTransport) AddOutput(id state.PeerID, c chan<- Packet) {
+	t.out[id] = c
+}
+
+func (t *ChannelTransport) Watch() Packet {
+	return <-t.in
+}
+
+func (t *ChannelTransport) Send(sender state.PeerID, peer state.PeerID, payload *protobuf.Payload) error {
+	// @todo we can do this better, we put node onlineness into a goroutine where we just stop the nodes for x seconds
+	// outside of this class
+	math.Seed(time.Now().UnixNano())
+	if math.Intn(100) < t.offline {
+		return nil
+	}
+
+	c, ok := t.out[peer]
+	if !ok {
+		return errors.New("peer unknown")
+	}
+
+	c <- Packet{Sender: sender, Payload: payload}
+	return nil
+}

vendor/github.com/status-im/mvds/transport/transport.go

@@ -0,0 +1,18 @@
+// Package transport contains transport related logic for MVDS.
+package transport
+
+import (
+	"github.com/status-im/mvds/protobuf"
+	"github.com/status-im/mvds/state"
+)
+
+type Packet struct {
+	Sender  state.PeerID
+	Payload *protobuf.Payload
+}
+
+// Transport defines an interface allowing for agnostic transport implementations.
+type Transport interface {
+	Watch() Packet
+	Send(sender state.PeerID, peer state.PeerID, payload *protobuf.Payload) error
+}