Merge branch 'main' of github.com:anytypeio/any-sync into update-fileproto

app/app.go

@@ -172,7 +172,7 @@ func (app *App) Start(ctx context.Context) (err error) {
 	for i, s := range app.components {
 		if err = s.Init(app); err != nil {
 			closeServices(i)
-			return fmt.Errorf("can't init service '%s': %v", s.Name(), err)
+			return fmt.Errorf("can't init service '%s': %w", s.Name(), err)
 		}
 	}
 
@@ -181,7 +181,7 @@ func (app *App) Start(ctx context.Context) (err error) {
 			start := time.Now()
 			if err = serviceRun.Run(ctx); err != nil {
 				closeServices(i)
-				return fmt.Errorf("can't run service '%s': %v", serviceRun.Name(), err)
+				return fmt.Errorf("can't run service '%s': %w", serviceRun.Name(), err)
 			}
 			spent := time.Since(start).Milliseconds()
 			app.startStat.SpentMsTotal += spent

app/logger/config.go

@@ -1,33 +1,87 @@
 package logger
 
-import "go.uber.org/zap"
+import (
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+
+	"github.com/anytypeio/any-sync/util/slice"
+)
+
+type LogFormat int
+
+const (
+	ColorizedOutput LogFormat = iota
+	PlaintextOutput
+	JSONOutput
+)
 
 type Config struct {
 	Production     bool              `yaml:"production"`
 	DefaultLevel   string            `yaml:"defaultLevel"`
 	NamedLevels    map[string]string `yaml:"namedLevels"`
+	AddOutputPaths []string          `yaml:"outputPaths"`
+	DisableStdErr  bool              `yaml:"disableStdErr"`
+	Format         LogFormat         `yaml:"format"`
+	ZapConfig      *zap.Config       `yaml:"-"` // optional, if set it will be used instead of other config options
 }
 
 func (l Config) ApplyGlobal() {
 	var conf zap.Config
+	if l.ZapConfig != nil {
+		conf = *l.ZapConfig
+	} else {
 		if l.Production {
 			conf = zap.NewProductionConfig()
 		} else {
 			conf = zap.NewDevelopmentConfig()
 		}
+		encConfig := conf.EncoderConfig
+		switch l.Format {
+		case PlaintextOutput:
+			encConfig.EncodeLevel = zapcore.CapitalLevelEncoder
+			conf.Encoding = "console"
+		case JSONOutput:
+			encConfig.MessageKey = "msg"
+			encConfig.TimeKey = "ts"
+			encConfig.LevelKey = "level"
+			encConfig.NameKey = "logger"
+			encConfig.CallerKey = "caller"
+			encConfig.EncodeTime = zapcore.ISO8601TimeEncoder
+			conf.Encoding = "json"
+		default:
+			// default is ColorizedOutput
+			conf.Encoding = "console"
+			encConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder
+		}
+
+		conf.EncoderConfig = encConfig
+		if len(l.AddOutputPaths) > 0 {
+			conf.OutputPaths = append(conf.OutputPaths, l.AddOutputPaths...)
+		}
+		if l.DisableStdErr {
+			conf.OutputPaths = slice.Filter(conf.OutputPaths, func(path string) bool {
+				return path != "stderr"
+			})
+		}
+
 		if defaultLevel, err := zap.ParseAtomicLevel(l.DefaultLevel); err == nil {
 			conf.Level = defaultLevel
 		}
-	var levels = make(map[string]zap.AtomicLevel)
+	}
+	var lvl = make(map[string]zap.AtomicLevel)
 	for k, v := range l.NamedLevels {
-		if lev, err := zap.ParseAtomicLevel(v); err != nil {
+		if lev, err := zap.ParseAtomicLevel(v); err == nil {
-			levels[k] = lev
+			lvl[k] = lev
+			// we need to have a minimum level of all named loggers for the main logger
+			if lev.Level() < conf.Level.Level() {
+				conf.Level.SetLevel(lev.Level())
 			}
 		}
-	defaultLogger, err := conf.Build()
+	}
+	lg, err := conf.Build()
 	if err != nil {
 		Default().Fatal("can't build logger", zap.Error(err))
 	}
-	SetDefault(defaultLogger)
+	SetDefault(lg)
-	SetNamedLevels(levels)
+	SetNamedLevels(lvl)
 }

app/logger/ctxfiled.go

@@ -32,6 +32,7 @@ func CtxGetFields(ctx context.Context) (fields []zap.Field) {
 
 type CtxLogger struct {
 	*zap.Logger
+	name string
 }
 
 func (cl CtxLogger) DebugCtx(ctx context.Context, msg string, fields ...zap.Field) {
@@ -51,5 +52,9 @@ func (cl CtxLogger) ErrorCtx(ctx context.Context, msg string, fields ...zap.Fiel
 }
 
 func (cl CtxLogger) With(fields ...zap.Field) CtxLogger {
-	return CtxLogger{cl.Logger.With(fields...)}
+	return CtxLogger{cl.Logger.With(fields...), cl.name}
+}
+
+func (cl CtxLogger) Sugar() *zap.SugaredLogger {
+	return NewNamedSugared(cl.name)
 }

app/logger/log.go

@@ -1,51 +1,132 @@
 package logger
 
 import (
-	"go.uber.org/zap"
 	"sync"
+
+	"github.com/gobwas/glob"
+	"go.uber.org/zap"
 )
 
 var (
 	mu                sync.Mutex
-	defaultLogger *zap.Logger
+	logger            *zap.Logger
-	levels        = make(map[string]zap.AtomicLevel)
+	loggerConfig      zap.Config
-	loggers       = make(map[string]CtxLogger)
+	namedLevels       = make(map[string]zap.AtomicLevel)
+	namedGlobs        = make(map[string]glob.Glob)
+	namedLoggers      = make(map[string]CtxLogger)
+	namedSugarLoggers = make(map[string]*zap.SugaredLogger)
 )
 
 func init() {
-	defaultLogger, _ = zap.NewDevelopment()
+	loggerConfig = zap.NewDevelopmentConfig()
-	zap.NewProduction()
+	logger, _ = loggerConfig.Build()
 }
 
+// SetDefault replaces the default logger
+// you need to call SetNamedLevels after in case you have named loggers,
+// otherwise they will use the old logger
 func SetDefault(l *zap.Logger) {
 	mu.Lock()
 	defer mu.Unlock()
-	*defaultLogger = *l
+	*logger = *l
-	for name, l := range loggers {
-		*l.Logger = *defaultLogger.Named(name)
-	}
 }
 
+// SetNamedLevels sets the namedLevels for named loggers
+// it also supports glob patterns for names, like "app*"
+// can be racy in case there are existing named loggers
+// so consider to call only once at the beginning
 func SetNamedLevels(l map[string]zap.AtomicLevel) {
 	mu.Lock()
 	defer mu.Unlock()
-	levels = l
+	namedLevels = l
+
+	var minLevel = logger.Level()
+	for k, l := range namedLevels {
+		g, err := glob.Compile(k)
+		if err == nil {
+			namedGlobs[k] = g
+		}
+		namedLevels[k] = l
+		if l.Level() < minLevel {
+			minLevel = l.Level()
+		}
+	}
+
+	if minLevel < logger.Level() {
+		// recreate logger if the min level is lower than the current min one
+		loggerConfig.Level = zap.NewAtomicLevelAt(minLevel)
+		logger, _ = loggerConfig.Build()
+	}
+
+	for name, nl := range namedLoggers {
+		level := getLevel(name)
+		newCore := zap.New(logger.Core()).Named(name).WithOptions(
+			zap.IncreaseLevel(level),
+		)
+		*(nl.Logger) = *newCore
+	}
+
+	for name, nl := range namedSugarLoggers {
+		level := getLevel(name)
+		newCore := zap.New(logger.Core()).Named(name).WithOptions(
+			zap.IncreaseLevel(level),
+		).Sugar()
+		*(nl) = *newCore
+	}
 }
 
 func Default() *zap.Logger {
 	mu.Lock()
 	defer mu.Unlock()
-	return defaultLogger
+	return logger
+}
+
+func getLevel(name string) zap.AtomicLevel {
+	level, ok := namedLevels[name]
+	if !ok {
+		var found bool
+		for globName, glob := range namedGlobs {
+			if glob.Match(name) {
+				found = true
+				level, _ = namedLevels[globName]
+				// no need to check ok, because we know that globName exists
+				break
+			}
+		}
+		if !found {
+			level = loggerConfig.Level
+		}
+	}
+	return level
 }
 
 func NewNamed(name string, fields ...zap.Field) CtxLogger {
 	mu.Lock()
 	defer mu.Unlock()
-	l := defaultLogger.Named(name)
+
-	if len(fields) > 0 {
+	if l, nameExists := namedLoggers[name]; nameExists {
-		l = l.With(fields...)
+		return l
 	}
-	ctxL := CtxLogger{l}
+
-	loggers[name] = ctxL
+	level := getLevel(name)
+	l := zap.New(logger.Core()).Named(name).WithOptions(zap.IncreaseLevel(level),
+		zap.Fields(fields...))
+
+	ctxL := CtxLogger{Logger: l, name: name}
+	namedLoggers[name] = ctxL
 	return ctxL
 }
+
+func NewNamedSugared(name string) *zap.SugaredLogger {
+	mu.Lock()
+	defer mu.Unlock()
+
+	if l, nameExists := namedSugarLoggers[name]; nameExists {
+		return l
+	}
+
+	level := getLevel(name)
+	l := zap.New(logger.Core()).Named(name).Sugar().WithOptions(zap.IncreaseLevel(level))
+	namedSugarLoggers[name] = l
+	return l
+}

app/ocache/entry.go

@@ -0,0 +1,120 @@
+package ocache
+
+import (
+	"context"
+	"go.uber.org/zap"
+	"sync"
+	"time"
+)
+
+type entryState int
+
+const (
+	entryStateLoading = iota
+	entryStateActive
+	entryStateClosing
+	entryStateClosed
+)
+
+type entry struct {
+	id        string
+	state     entryState
+	lastUsage time.Time
+	load      chan struct{}
+	loadErr   error
+	value     Object
+	close     chan struct{}
+	mx        sync.Mutex
+}
+
+func newEntry(id string, value Object, state entryState) *entry {
+	return &entry{
+		id:        id,
+		load:      make(chan struct{}),
+		lastUsage: time.Now(),
+		state:     state,
+		value:     value,
+	}
+}
+
+func (e *entry) isActive() bool {
+	e.mx.Lock()
+	defer e.mx.Unlock()
+	return e.state == entryStateActive
+}
+
+func (e *entry) isClosing() bool {
+	e.mx.Lock()
+	defer e.mx.Unlock()
+	return e.state == entryStateClosed || e.state == entryStateClosing
+}
+
+func (e *entry) waitLoad(ctx context.Context, id string) (value Object, err error) {
+	select {
+	case <-ctx.Done():
+		log.DebugCtx(ctx, "ctx done while waiting on object load", zap.String("id", id))
+		return nil, ctx.Err()
+	case <-e.load:
+		return e.value, e.loadErr
+	}
+}
+
+func (e *entry) waitClose(ctx context.Context, id string) (res bool, err error) {
+	e.mx.Lock()
+	switch e.state {
+	case entryStateClosing:
+		waitCh := e.close
+		e.mx.Unlock()
+		select {
+		case <-ctx.Done():
+			log.DebugCtx(ctx, "ctx done while waiting on object close", zap.String("id", id))
+			return false, ctx.Err()
+		case <-waitCh:
+			return true, nil
+		}
+	case entryStateClosed:
+		e.mx.Unlock()
+		return true, nil
+	default:
+		e.mx.Unlock()
+		return false, nil
+	}
+}
+
+func (e *entry) setClosing(wait bool) (prevState, curState entryState) {
+	e.mx.Lock()
+	prevState = e.state
+	curState = e.state
+	if e.state == entryStateClosing {
+		waitCh := e.close
+		e.mx.Unlock()
+		if !wait {
+			return
+		}
+		<-waitCh
+		e.mx.Lock()
+	}
+	if e.state != entryStateClosed {
+		e.state = entryStateClosing
+		e.close = make(chan struct{})
+	}
+	curState = e.state
+	e.mx.Unlock()
+	return
+}
+
+func (e *entry) setActive(chClose bool) {
+	e.mx.Lock()
+	defer e.mx.Unlock()
+	if chClose {
+		close(e.close)
+	}
+	e.state = entryStateActive
+}
+
+func (e *entry) setClosed() {
+	e.mx.Lock()
+	defer e.mx.Unlock()
+	close(e.close)
+	e.state = entryStateClosed
+}

app/ocache/metrics.go

@@ -1,11 +1,18 @@
 package ocache
 
-import "github.com/prometheus/client_golang/prometheus"
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"strings"
+)
 
 func WithPrometheus(reg *prometheus.Registry, namespace, subsystem string) Option {
 	if subsystem == "" {
 		subsystem = "cache"
 	}
+	nameSplit := strings.Split(namespace, ".")
+	subSplit := strings.Split(subsystem, ".")
+	namespace = strings.Join(nameSplit, "_")
+	subsystem = strings.Join(subSplit, "_")
 	if reg == nil {
 		return nil
 	}

app/ocache/metrics_test.go

@@ -0,0 +1,19 @@
+package ocache
+
+import (
+	"context"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/stretchr/testify/require"
+	"strings"
+	"testing"
+)
+
+func TestWithPrometheus_MetricsConvertsDots(t *testing.T) {
+	opt := WithPrometheus(prometheus.NewRegistry(), "some.name", "some.system")
+	cache := New(func(ctx context.Context, id string) (value Object, err error) {
+		return &testObject{}, nil
+	}, opt).(*oCache)
+	_, err := cache.Get(context.Background(), "id")
+	require.NoError(t, err)
+	require.True(t, strings.Contains(cache.metrics.hit.Desc().String(), "some_name_some_system_hit"))
+}

app/ocache/ocache.go

@@ -44,12 +44,6 @@ var WithGCPeriod = func(gcPeriod time.Duration) Option {
 	}
 }
 
-var WithRefCounter = func(enable bool) Option {
-	return func(cache *oCache) {
-		cache.refCounter = enable
-	}
-}
-
 func New(loadFunc LoadFunc, opts ...Option) OCache {
 	c := &oCache{
 		data:     make(map[string]*entry),
@@ -73,33 +67,7 @@ func New(loadFunc LoadFunc, opts ...Option) OCache {
 
 type Object interface {
 	Close() (err error)
-}
+	TryClose(objectTTL time.Duration) (res bool, err error)
-
-type ObjectLocker interface {
-	Object
-	Locked() bool
-}
-
-type ObjectLastUsage interface {
-	LastUsage() time.Time
-}
-
-type entry struct {
-	id        string
-	lastUsage time.Time
-	refCount  uint32
-	isClosing bool
-	load      chan struct{}
-	loadErr   error
-	value     Object
-	close     chan struct{}
-}
-
-func (e *entry) locked() bool {
-	if locker, ok := e.value.(ObjectLocker); ok {
-		return locker.Locked()
-	}
-	return false
 }
 
 type OCache interface {
@@ -116,12 +84,8 @@ type OCache interface {
 	// Add adds new object to cache
 	// Returns error when object exists
 	Add(id string, value Object) (err error)
-	// Release decreases the refs counter
-	Release(id string) bool
-	// Reset sets refs counter to 0
-	Reset(id string) bool
 	// Remove closes and removes object
-	Remove(id string) (ok bool, err error)
+	Remove(ctx context.Context, id string) (ok bool, err error)
 	// ForEach iterates over all loaded objects, breaks when callback returns false
 	ForEach(f func(v Object) (isContinue bool))
 	// GC frees not used and expired objects
@@ -144,7 +108,6 @@ type oCache struct {
 	closeCh  chan struct{}
 	log      *zap.SugaredLogger
 	metrics  *metrics
-	refCounter bool
 }
 
 func (c *oCache) Get(ctx context.Context, id string) (value Object, err error) {
@@ -160,69 +123,36 @@ Load:
 		return nil, ErrClosed
 	}
 	if e, ok = c.data[id]; !ok {
+		e = newEntry(id, nil, entryStateLoading)
 		load = true
-		e = &entry{
-			id:   id,
-			load: make(chan struct{}),
-		}
 		c.data[id] = e
 	}
-	closing := e.isClosing
+	e.lastUsage = time.Now()
-	if !e.isClosing {
-		e.lastUsage = c.timeNow()
-		if c.refCounter {
-			e.refCount++
-		}
-	}
 	c.mu.Unlock()
-	if closing {
+	reload, err := e.waitClose(ctx, id)
-		select {
+	if err != nil {
-		case <-ctx.Done():
+		return nil, err
-			log.DebugCtx(ctx, "ctx done while waiting on object close", zap.String("id", id))
+	}
-			return nil, ctx.Err()
+	if reload {
-		case <-e.close:
 		goto Load
 	}
-	}
-
 	if load {
 		go c.load(ctx, id, e)
 	}
-	if c.metrics != nil {
+	c.metricsGet(!load)
-		if load {
+	return e.waitLoad(ctx, id)
-			c.metrics.miss.Inc()
-		} else {
-			c.metrics.hit.Inc()
-		}
-	}
-	select {
-	case <-ctx.Done():
-		log.DebugCtx(ctx, "ctx done while waiting on object load", zap.String("id", id))
-		return nil, ctx.Err()
-	case <-e.load:
-	}
-	return e.value, e.loadErr
 }
 
 func (c *oCache) Pick(ctx context.Context, id string) (value Object, err error) {
 	c.mu.Lock()
 	val, ok := c.data[id]
-	if !ok || val.isClosing {
+	if !ok || val.isClosing() {
 		c.mu.Unlock()
 		return nil, ErrNotExists
 	}
 	c.mu.Unlock()
-
+	c.metricsGet(true)
-	if c.metrics != nil {
+	return val.waitLoad(ctx, id)
-		c.metrics.hit.Inc()
-	}
-
-	select {
-	case <-ctx.Done():
-		return nil, ctx.Err()
-	case <-val.load:
-		return val.value, val.loadErr
-	}
 }
 
 func (c *oCache) load(ctx context.Context, id string, e *entry) {
@@ -236,63 +166,39 @@ func (c *oCache) load(ctx context.Context, id string, e *entry) {
 		delete(c.data, id)
 	} else {
 		e.value = value
+		e.setActive(false)
 	}
 }
 
-func (c *oCache) Release(id string) bool {
+func (c *oCache) Remove(ctx context.Context, id string) (ok bool, err error) {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-	if c.closed {
-		return false
-	}
-	if e, ok := c.data[id]; ok {
-		if c.refCounter && e.refCount > 0 {
-			e.refCount--
-			return true
-		}
-	}
-	return false
-}
-
-func (c *oCache) Reset(id string) bool {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-	if c.closed {
-		return false
-	}
-	if e, ok := c.data[id]; ok {
-		e.refCount = 0
-		return true
-	}
-	return false
-}
-
-func (c *oCache) Remove(id string) (ok bool, err error) {
 	c.mu.Lock()
 	if c.closed {
 		c.mu.Unlock()
 		err = ErrClosed
 		return
 	}
-	var e *entry
+	e, ok := c.data[id]
-	e, ok = c.data[id]
+	if !ok {
-	if !ok || e.isClosing {
 		c.mu.Unlock()
-		return
+		return false, ErrNotExists
 	}
-	e.isClosing = true
-	e.close = make(chan struct{})
 	c.mu.Unlock()
+	return c.remove(ctx, e)
+}
 
-	<-e.load
+func (c *oCache) remove(ctx context.Context, e *entry) (ok bool, err error) {
-	if e.value != nil {
+	if _, err = e.waitLoad(ctx, e.id); err != nil {
-		err = e.value.Close()
+		return false, err
 	}
+	_, curState := e.setClosing(true)
+	if curState == entryStateClosing {
+		ok = true
+		err = e.value.Close()
 		c.mu.Lock()
-	close(e.close)
+		e.setClosed()
 		delete(c.data, e.id)
 		c.mu.Unlock()
-
+	}
 	return
 }
 
@@ -314,13 +220,7 @@ func (c *oCache) Add(id string, value Object) (err error) {
 	if _, ok := c.data[id]; ok {
 		return ErrExists
 	}
-	e := &entry{
+	e := newEntry(id, value, entryStateActive)
-		id:        id,
-		lastUsage: time.Now(),
-		refCount:  0,
-		load:      make(chan struct{}),
-		value:     value,
-	}
 	close(e.load)
 	c.data[id] = e
 	return
@@ -332,7 +232,7 @@ func (c *oCache) ForEach(f func(obj Object) (isContinue bool)) {
 	for _, v := range c.data {
 		select {
 		case <-v.load:
-			if v.value != nil && !v.isClosing {
+			if v.value != nil && !v.isClosing() {
 				objects = append(objects, v.value)
 			}
 		default:
@@ -368,41 +268,36 @@ func (c *oCache) GC() {
 	deadline := c.timeNow().Add(-c.ttl)
 	var toClose []*entry
 	for _, e := range c.data {
-		if e.isClosing {
+		if e.isActive() && e.lastUsage.Before(deadline) {
-			continue
-		}
-		lu := e.lastUsage
-		if lug, ok := e.value.(ObjectLastUsage); ok {
-			lu = lug.LastUsage()
-		}
-		if !e.locked() && e.refCount <= 0 && lu.Before(deadline) {
-			e.isClosing = true
 			e.close = make(chan struct{})
 			toClose = append(toClose, e)
 		}
 	}
 	size := len(c.data)
 	c.mu.Unlock()
-
+	closedNum := 0
 	for _, e := range toClose {
-		<-e.load
+		prevState, _ := e.setClosing(false)
-		if e.value != nil {
+		if prevState == entryStateClosing || prevState == entryStateClosed {
-			if err := e.value.Close(); err != nil {
+			continue
+		}
+		closed, err := e.value.TryClose(c.ttl)
+		if err != nil {
 			c.log.With("object_id", e.id).Warnf("GC: object close error: %v", err)
 		}
-		}
+		if !closed {
-	}
+			e.setActive(true)
-	c.log.Infof("GC: removed %d; cache size: %d", len(toClose), size)
+			continue
-	if len(toClose) > 0 && c.metrics != nil {
+		} else {
-		c.metrics.gc.Add(float64(len(toClose)))
+			closedNum++
-	}
 			c.mu.Lock()
-	for _, e := range toClose {
+			e.setClosed()
-		close(e.close)
 			delete(c.data, e.id)
-	}
 			c.mu.Unlock()
 		}
+	}
+	c.metricsClosed(closedNum, size)
+}
 
 func (c *oCache) Len() int {
 	c.mu.Lock()
@@ -418,25 +313,34 @@ func (c *oCache) Close() (err error) {
 	}
 	c.closed = true
 	close(c.closeCh)
-	var toClose, alreadyClosing []*entry
+	var toClose []*entry
 	for _, e := range c.data {
-		if e.isClosing {
-			alreadyClosing = append(alreadyClosing, e)
-		} else {
 		toClose = append(toClose, e)
 	}
-	}
 	c.mu.Unlock()
 	for _, e := range toClose {
-		<-e.load
+		if _, err := c.remove(context.Background(), e); err != nil && err != ErrNotExists {
-		if e.value != nil {
+			c.log.With("object_id", e.id).Warnf("cache close: object close error: %v", err)
-			if clErr := e.value.Close(); clErr != nil {
-				c.log.With("object_id", e.id).Warnf("cache close: object close error: %v", clErr)
 		}
 	}
-	}
-	for _, e := range alreadyClosing {
-		<-e.close
-	}
 	return nil
 }
+
+func (c *oCache) metricsGet(hit bool) {
+	if c.metrics == nil {
+		return
+	}
+	if hit {
+		c.metrics.hit.Inc()
+	} else {
+		c.metrics.miss.Inc()
+	}
+}
+
+func (c *oCache) metricsClosed(closedLen, size int) {
+	c.log.Infof("GC: removed %d; cache size: %d", closedLen, size)
+	if c.metrics == nil || closedLen == 0 {
+		return
+	}
+	c.metrics.gc.Add(float64(closedLen))
+}

app/ocache/ocache_test.go

@@ -3,6 +3,8 @@ package ocache
 import (
 	"context"
 	"errors"
+	"fmt"
+	"sync"
 	"sync/atomic"
 	"testing"
 	"time"
@@ -11,26 +13,48 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+var ctx = context.Background()
+
 type testObject struct {
 	name           string
 	closeErr       error
 	closeCh        chan struct{}
+	tryReturn      bool
+	closeCalled    bool
+	tryCloseCalled bool
 }
 
-func NewTestObject(name string, closeCh chan struct{}) *testObject {
+func NewTestObject(name string, tryReturn bool, closeCh chan struct{}) *testObject {
 	return &testObject{
 		name:      name,
 		closeCh:   closeCh,
+		tryReturn: tryReturn,
 	}
 }
 
 func (t *testObject) Close() (err error) {
+	if t.closeCalled || (t.tryCloseCalled && t.tryReturn) {
+		panic("close called twice")
+	}
+	t.closeCalled = true
 	if t.closeCh != nil {
 		<-t.closeCh
 	}
 	return t.closeErr
 }
 
+func (t *testObject) TryClose(objectTTL time.Duration) (res bool, err error) {
+	if t.closeCalled || (t.tryCloseCalled && t.tryReturn) {
+		panic("close called twice")
+	}
+	t.tryCloseCalled = true
+	if t.closeCh != nil {
+		<-t.closeCh
+		return t.tryReturn, t.closeErr
+	}
+	return t.tryReturn, nil
+}
+
 func TestOCache_Get(t *testing.T) {
 	t.Run("successful", func(t *testing.T) {
 		c := New(func(ctx context.Context, id string) (value Object, err error) {
@@ -116,42 +140,37 @@ func TestOCache_Get(t *testing.T) {
 }
 
 func TestOCache_GC(t *testing.T) {
-	t.Run("test without close wait", func(t *testing.T) {
+	t.Run("test gc expired object", func(t *testing.T) {
 		c := New(func(ctx context.Context, id string) (value Object, err error) {
-			return &testObject{name: id}, nil
+			return NewTestObject(id, true, nil), nil
-		}, WithTTL(time.Millisecond*10), WithRefCounter(true))
+		}, WithTTL(time.Millisecond*10))
 		val, err := c.Get(context.TODO(), "id")
 		require.NoError(t, err)
 		require.NotNil(t, val)
 		assert.Equal(t, 1, c.Len())
 		c.GC()
 		assert.Equal(t, 1, c.Len())
-		time.Sleep(time.Millisecond * 30)
+		time.Sleep(time.Millisecond * 20)
-		c.GC()
-		assert.Equal(t, 1, c.Len())
-		assert.True(t, c.Release("id"))
 		c.GC()
 		assert.Equal(t, 0, c.Len())
-		assert.False(t, c.Release("id"))
 	})
-	t.Run("test with close wait", func(t *testing.T) {
+	t.Run("test gc tryClose true, close before get", func(t *testing.T) {
 		closeCh := make(chan struct{})
 		getCh := make(chan struct{})
 
 		c := New(func(ctx context.Context, id string) (value Object, err error) {
-			return NewTestObject(id, closeCh), nil
+			return NewTestObject(id, true, closeCh), nil
-		}, WithTTL(time.Millisecond*10), WithRefCounter(true))
+		}, WithTTL(time.Millisecond*10))
 		val, err := c.Get(context.TODO(), "id")
 		require.NoError(t, err)
 		require.NotNil(t, val)
 		assert.Equal(t, 1, c.Len())
-		assert.True(t, c.Release("id"))
 		// making ttl pass
-		time.Sleep(time.Millisecond * 40)
+		time.Sleep(time.Millisecond * 20)
 		// first gc will be run after 20 secs, so calling it manually
 		go c.GC()
 		// waiting until all objects are marked as closing
-		time.Sleep(time.Millisecond * 40)
+		time.Sleep(time.Millisecond * 20)
 		var events []string
 		go func() {
 			_, err := c.Get(context.TODO(), "id")
@@ -160,33 +179,114 @@ func TestOCache_GC(t *testing.T) {
 			events = append(events, "get")
 			close(getCh)
 		}()
-		events = append(events, "close")
 		// sleeping to make sure that Get is called
-		time.Sleep(time.Millisecond * 40)
+		time.Sleep(time.Millisecond * 20)
+		events = append(events, "close")
 		close(closeCh)
 
 		<-getCh
 		require.Equal(t, []string{"close", "get"}, events)
 	})
+	t.Run("test gc tryClose false, many parallel get", func(t *testing.T) {
+		timesCalled := &atomic.Int32{}
+		obj := NewTestObject("id", false, nil)
+		c := New(func(ctx context.Context, id string) (value Object, err error) {
+			timesCalled.Add(1)
+			return obj, nil
+		}, WithTTL(0))
+
+		val, err := c.Get(context.TODO(), "id")
+		require.NoError(t, err)
+		require.NotNil(t, val)
+		assert.Equal(t, 1, c.Len())
+		begin := make(chan struct{})
+		wg := sync.WaitGroup{}
+		once := sync.Once{}
+
+		wg.Add(1)
+		go func() {
+			<-begin
+			c.GC()
+			wg.Done()
+		}()
+		for i := 0; i < 50; i++ {
+			wg.Add(1)
+			go func(i int) {
+				once.Do(func() {
+					close(begin)
+				})
+				if i%2 != 0 {
+					time.Sleep(time.Millisecond)
+				}
+				_, err := c.Get(context.TODO(), "id")
+				require.NoError(t, err)
+				wg.Done()
+			}(i)
+		}
+		require.NoError(t, err)
+		wg.Wait()
+		require.Equal(t, timesCalled.Load(), int32(1))
+		require.True(t, obj.tryCloseCalled)
+	})
+	t.Run("test gc tryClose different, many objects", func(t *testing.T) {
+		tryCloseIds := make(map[string]bool)
+		called := make(map[string]int)
+		max := 1000
+		getId := func(i int) string {
+			return fmt.Sprintf("id%d", i)
+		}
+		for i := 0; i < max; i++ {
+			if i%2 == 1 {
+				tryCloseIds[getId(i)] = true
+			} else {
+				tryCloseIds[getId(i)] = false
+			}
+		}
+		c := New(func(ctx context.Context, id string) (value Object, err error) {
+			called[id] = called[id] + 1
+			return NewTestObject(id, tryCloseIds[id], nil), nil
+		}, WithTTL(time.Millisecond*10))
+
+		for i := 0; i < max; i++ {
+			val, err := c.Get(context.TODO(), getId(i))
+			require.NoError(t, err)
+			require.NotNil(t, val)
+		}
+		assert.Equal(t, max, c.Len())
+		time.Sleep(time.Millisecond * 20)
+		c.GC()
+		for i := 0; i < max; i++ {
+			val, err := c.Get(context.TODO(), getId(i))
+			require.NoError(t, err)
+			require.NotNil(t, val)
+		}
+		for i := 0; i < max; i++ {
+			val, err := c.Get(context.TODO(), getId(i))
+			require.NoError(t, err)
+			require.NotNil(t, val)
+			require.Equal(t, called[getId(i)], i%2+1)
+		}
+	})
 }
 
 func Test_OCache_Remove(t *testing.T) {
+	t.Run("remove simple", func(t *testing.T) {
 		closeCh := make(chan struct{})
 		getCh := make(chan struct{})
-
 		c := New(func(ctx context.Context, id string) (value Object, err error) {
-		return NewTestObject(id, closeCh), nil
+			return NewTestObject(id, false, closeCh), nil
 		}, WithTTL(time.Millisecond*10))
+
 		val, err := c.Get(context.TODO(), "id")
 		require.NoError(t, err)
 		require.NotNil(t, val)
 		assert.Equal(t, 1, c.Len())
 		// removing the object, so we will wait on closing
 		go func() {
-		_, err := c.Remove("id")
+			_, err := c.Remove(ctx, "id")
 			require.NoError(t, err)
 		}()
-	time.Sleep(time.Millisecond * 40)
+		time.Sleep(time.Millisecond * 20)
 
 		var events []string
 		go func() {
@@ -196,11 +296,196 @@ func Test_OCache_Remove(t *testing.T) {
 			events = append(events, "get")
 			close(getCh)
 		}()
-	events = append(events, "close")
 		// sleeping to make sure that Get is called
-	time.Sleep(time.Millisecond * 40)
+		time.Sleep(time.Millisecond * 20)
+		events = append(events, "close")
 		close(closeCh)
 
 		<-getCh
 		require.Equal(t, []string{"close", "get"}, events)
+	})
+	t.Run("test remove while gc, tryClose false", func(t *testing.T) {
+		closeCh := make(chan struct{})
+		removeCh := make(chan struct{})
+
+		c := New(func(ctx context.Context, id string) (value Object, err error) {
+			return NewTestObject(id, false, closeCh), nil
+		}, WithTTL(time.Millisecond*10))
+		val, err := c.Get(context.TODO(), "id")
+		require.NoError(t, err)
+		require.NotNil(t, val)
+		assert.Equal(t, 1, c.Len())
+		time.Sleep(time.Millisecond * 20)
+		go c.GC()
+		time.Sleep(time.Millisecond * 20)
+		var events []string
+		go func() {
+			ok, err := c.Remove(ctx, "id")
+			require.NoError(t, err)
+			require.True(t, ok)
+			events = append(events, "remove")
+			close(removeCh)
+		}()
+		time.Sleep(time.Millisecond * 20)
+		events = append(events, "close")
+		close(closeCh)
+
+		<-removeCh
+		require.Equal(t, []string{"close", "remove"}, events)
+	})
+	t.Run("test remove while gc, tryClose true", func(t *testing.T) {
+		closeCh := make(chan struct{})
+		removeCh := make(chan struct{})
+
+		c := New(func(ctx context.Context, id string) (value Object, err error) {
+			return NewTestObject(id, true, closeCh), nil
+		}, WithTTL(time.Millisecond*10))
+		val, err := c.Get(context.TODO(), "id")
+		require.NoError(t, err)
+		require.NotNil(t, val)
+		assert.Equal(t, 1, c.Len())
+		time.Sleep(time.Millisecond * 20)
+		go c.GC()
+		time.Sleep(time.Millisecond * 20)
+		var events []string
+		go func() {
+			ok, err := c.Remove(ctx, "id")
+			require.NoError(t, err)
+			require.False(t, ok)
+			events = append(events, "remove")
+			close(removeCh)
+		}()
+		time.Sleep(time.Millisecond * 20)
+		events = append(events, "close")
+		close(closeCh)
+
+		<-removeCh
+		require.Equal(t, []string{"close", "remove"}, events)
+	})
+	t.Run("test gc while remove, tryClose true", func(t *testing.T) {
+		closeCh := make(chan struct{})
+		removeCh := make(chan struct{})
+
+		c := New(func(ctx context.Context, id string) (value Object, err error) {
+			return NewTestObject(id, true, closeCh), nil
+		}, WithTTL(time.Millisecond*10))
+		val, err := c.Get(context.TODO(), "id")
+		require.NoError(t, err)
+		require.NotNil(t, val)
+		assert.Equal(t, 1, c.Len())
+		go func() {
+			ok, err := c.Remove(ctx, "id")
+			require.NoError(t, err)
+			require.True(t, ok)
+			close(removeCh)
+		}()
+		time.Sleep(20 * time.Millisecond)
+		c.GC()
+		close(closeCh)
+		<-removeCh
+	})
+}
+
+func TestOCacheFuzzy(t *testing.T) {
+	t.Run("test many objects gc, get and remove simultaneously, close after", func(t *testing.T) {
+		tryCloseIds := make(map[string]bool)
+		max := 2000
+		getId := func(i int) string {
+			return fmt.Sprintf("id%d", i)
+		}
+		for i := 0; i < max; i++ {
+			if i%2 == 1 {
+				tryCloseIds[getId(i)] = true
+			} else {
+				tryCloseIds[getId(i)] = false
+			}
+		}
+		c := New(func(ctx context.Context, id string) (value Object, err error) {
+			return NewTestObject(id, tryCloseIds[id], nil), nil
+		}, WithTTL(time.Nanosecond))
+
+		stopGC := make(chan struct{})
+		wg := sync.WaitGroup{}
+		go func() {
+			for {
+				select {
+				case <-stopGC:
+					return
+				default:
+					c.GC()
+				}
+			}
+		}()
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for j := 0; j < 10; j++ {
+				for i := 0; i < max; i++ {
+					val, err := c.Get(context.TODO(), getId(i))
+					require.NoError(t, err)
+					require.NotNil(t, val)
+				}
+			}
+		}()
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for j := 0; j < 10; j++ {
+				for i := 0; i < max; i++ {
+					c.Remove(ctx, getId(i))
+				}
+			}
+		}()
+		wg.Wait()
+		close(stopGC)
+		err := c.Close()
+		require.NoError(t, err)
+		require.Equal(t, 0, c.Len())
+	})
+	t.Run("test many objects gc, get, remove and close simultaneously", func(t *testing.T) {
+		tryCloseIds := make(map[string]bool)
+		max := 2000
+		getId := func(i int) string {
+			return fmt.Sprintf("id%d", i)
+		}
+		for i := 0; i < max; i++ {
+			if i%2 == 1 {
+				tryCloseIds[getId(i)] = true
+			} else {
+				tryCloseIds[getId(i)] = false
+			}
+		}
+		c := New(func(ctx context.Context, id string) (value Object, err error) {
+			return NewTestObject(id, tryCloseIds[id], nil), nil
+		}, WithTTL(time.Nanosecond))
+
+		go func() {
+			for {
+				c.GC()
+			}
+		}()
+		go func() {
+			for j := 0; j < 10; j++ {
+				for i := 0; i < max; i++ {
+					val, err := c.Get(context.TODO(), getId(i))
+					if err == ErrClosed {
+						return
+					}
+					require.NoError(t, err)
+					require.NotNil(t, val)
+				}
+			}
+		}()
+		go func() {
+			for j := 0; j < 10; j++ {
+				for i := 0; i < max; i++ {
+					c.Remove(ctx, getId(i))
+				}
+			}
+		}()
+		time.Sleep(time.Millisecond)
+		err := c.Close()
+		require.NoError(t, err)
+		require.Equal(t, 0, c.Len())
+	})
 }

commonspace/credentialprovider/credentialprovider.go

@@ -0,0 +1,52 @@
+//go:generate mockgen -destination mock_credentialprovider/mock_credentialprovider.go github.com/anytypeio/any-sync/commonspace/credentialprovider CredentialProvider
+package credentialprovider
+
+import (
+	"context"
+	"github.com/anytypeio/any-sync/app"
+	"github.com/anytypeio/any-sync/commonspace/spacesyncproto"
+	"github.com/anytypeio/any-sync/coordinator/coordinatorclient"
+	"github.com/gogo/protobuf/proto"
+)
+
+const CName = "common.commonspace.credentialprovider"
+
+func New() app.Component {
+	return &credentialProvider{}
+}
+
+func NewNoOp() CredentialProvider {
+	return &noOpProvider{}
+}
+
+type CredentialProvider interface {
+	GetCredential(ctx context.Context, spaceHeader *spacesyncproto.RawSpaceHeaderWithId) ([]byte, error)
+}
+
+type noOpProvider struct {
+}
+
+func (n noOpProvider) GetCredential(ctx context.Context, spaceHeader *spacesyncproto.RawSpaceHeaderWithId) ([]byte, error) {
+	return nil, nil
+}
+
+type credentialProvider struct {
+	client coordinatorclient.CoordinatorClient
+}
+
+func (c *credentialProvider) Init(a *app.App) (err error) {
+	c.client = a.MustComponent(coordinatorclient.CName).(coordinatorclient.CoordinatorClient)
+	return
+}
+
+func (c *credentialProvider) Name() (name string) {
+	return CName
+}
+
+func (c *credentialProvider) GetCredential(ctx context.Context, spaceHeader *spacesyncproto.RawSpaceHeaderWithId) ([]byte, error) {
+	receipt, err := c.client.SpaceSign(ctx, spaceHeader.Id, spaceHeader.RawHeader)
+	if err != nil {
+		return nil, err
+	}
+	return proto.Marshal(receipt)
+}

commonspace/credentialprovider/mock_credentialprovider/mock_credentialprovider.go

@@ -0,0 +1,51 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: github.com/anytypeio/any-sync/commonspace/credentialprovider (interfaces: CredentialProvider)
+
+// Package mock_credentialprovider is a generated GoMock package.
+package mock_credentialprovider
+
+import (
+	context "context"
+	reflect "reflect"
+
+	spacesyncproto "github.com/anytypeio/any-sync/commonspace/spacesyncproto"
+	gomock "github.com/golang/mock/gomock"
+)
+
+// MockCredentialProvider is a mock of CredentialProvider interface.
+type MockCredentialProvider struct {
+	ctrl     *gomock.Controller
+	recorder *MockCredentialProviderMockRecorder
+}
+
+// MockCredentialProviderMockRecorder is the mock recorder for MockCredentialProvider.
+type MockCredentialProviderMockRecorder struct {
+	mock *MockCredentialProvider
+}
+
+// NewMockCredentialProvider creates a new mock instance.
+func NewMockCredentialProvider(ctrl *gomock.Controller) *MockCredentialProvider {
+	mock := &MockCredentialProvider{ctrl: ctrl}
+	mock.recorder = &MockCredentialProviderMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockCredentialProvider) EXPECT() *MockCredentialProviderMockRecorder {
+	return m.recorder
+}
+
+// GetCredential mocks base method.
+func (m *MockCredentialProvider) GetCredential(arg0 context.Context, arg1 *spacesyncproto.RawSpaceHeaderWithId) ([]byte, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetCredential", arg0, arg1)
+	ret0, _ := ret[0].([]byte)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// GetCredential indicates an expected call of GetCredential.
+func (mr *MockCredentialProviderMockRecorder) GetCredential(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetCredential", reflect.TypeOf((*MockCredentialProvider)(nil).GetCredential), arg0, arg1)
+}

commonspace/headsync/diffsyncer.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"github.com/anytypeio/any-sync/app/ldiff"
 	"github.com/anytypeio/any-sync/app/logger"
+	"github.com/anytypeio/any-sync/commonspace/credentialprovider"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/synctree"
 	"github.com/anytypeio/any-sync/commonspace/object/treegetter"
 	"github.com/anytypeio/any-sync/commonspace/peermanager"
@@ -33,6 +34,7 @@ func newDiffSyncer(
 	storage spacestorage.SpaceStorage,
 	clientFactory spacesyncproto.ClientFactory,
 	syncStatus syncstatus.StatusUpdater,
+	credentialProvider credentialprovider.CredentialProvider,
 	log logger.CtxLogger) DiffSyncer {
 	return &diffSyncer{
 		diff:               diff,
@@ -41,6 +43,7 @@ func newDiffSyncer(
 		storage:            storage,
 		peerManager:        peerManager,
 		clientFactory:      clientFactory,
+		credentialProvider: credentialProvider,
 		log:                log,
 		syncStatus:         syncStatus,
 	}
@@ -55,6 +58,7 @@ type diffSyncer struct {
 	clientFactory      spacesyncproto.ClientFactory
 	log                logger.CtxLogger
 	deletionState      settingsstate.ObjectDeletionState
+	credentialProvider credentialprovider.CredentialProvider
 	syncStatus         syncstatus.StatusUpdater
 }
 
@@ -86,6 +90,7 @@ func (d *diffSyncer) UpdateHeads(id string, heads []string) {
 }
 
 func (d *diffSyncer) Sync(ctx context.Context) error {
+	// TODO: split diffsyncer into components
 	st := time.Now()
 	// diffing with responsible peers according to configuration
 	peers, err := d.peerManager.GetResponsiblePeers(ctx)
@@ -117,6 +122,10 @@ func (d *diffSyncer) syncWithPeer(ctx context.Context, p peer.Peer) (err error)
 	newIds, changedIds, removedIds, err := d.diff.Diff(ctx, rdiff)
 	err = rpcerr.Unwrap(err)
 	if err != nil && err != spacesyncproto.ErrSpaceMissing {
+		if err == spacesyncproto.ErrSpaceIsDeleted {
+			d.log.Debug("got space deleted while syncing")
+			d.syncTrees(ctx, p.Id(), []string{d.storage.SpaceSettingsId()})
+		}
 		d.syncStatus.SetNodesOnline(p.Id(), false)
 		return fmt.Errorf("diff error: %v", err)
 	}
@@ -192,6 +201,10 @@ func (d *diffSyncer) sendPushSpaceRequest(ctx context.Context, peerId string, cl
 		return
 	}
 
+	cred, err := d.credentialProvider.GetCredential(ctx, header)
+	if err != nil {
+		return
+	}
 	spacePayload := &spacesyncproto.SpacePayload{
 		SpaceHeader:            header,
 		AclPayload:             root.Payload,
@@ -201,6 +214,7 @@ func (d *diffSyncer) sendPushSpaceRequest(ctx context.Context, peerId string, cl
 	}
 	_, err = cl.SpacePush(ctx, &spacesyncproto.SpacePushRequest{
 		Payload:    spacePayload,
+		Credential: cred,
 	})
 	if err != nil {
 		return

commonspace/headsync/diffsyncer_test.go

@@ -1,11 +1,13 @@
 package headsync
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	"github.com/anytypeio/any-sync/app/ldiff"
 	"github.com/anytypeio/any-sync/app/ldiff/mock_ldiff"
 	"github.com/anytypeio/any-sync/app/logger"
+	"github.com/anytypeio/any-sync/commonspace/credentialprovider/mock_credentialprovider"
 	"github.com/anytypeio/any-sync/commonspace/object/acl/aclrecordproto"
 	"github.com/anytypeio/any-sync/commonspace/object/acl/liststorage/mock_liststorage"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/treechangeproto"
@@ -30,6 +32,7 @@ type pushSpaceRequestMatcher struct {
 	spaceId     string
 	aclRootId   string
 	settingsId  string
+	credential  []byte
 	spaceHeader *spacesyncproto.RawSpaceHeaderWithId
 }
 
@@ -39,7 +42,7 @@ func (p pushSpaceRequestMatcher) Matches(x interface{}) bool {
 		return false
 	}
 
-	return res.Payload.AclPayloadId == p.aclRootId && res.Payload.SpaceHeader == p.spaceHeader && res.Payload.SpaceSettingsPayloadId == p.settingsId
+	return res.Payload.AclPayloadId == p.aclRootId && res.Payload.SpaceHeader == p.spaceHeader && res.Payload.SpaceSettingsPayloadId == p.settingsId && bytes.Equal(p.credential, res.Credential)
 }
 
 func (p pushSpaceRequestMatcher) String() string {
@@ -48,6 +51,10 @@ func (p pushSpaceRequestMatcher) String() string {
 
 type mockPeer struct{}
 
+func (m mockPeer) TryClose(objectTTL time.Duration) (res bool, err error) {
+	return true, m.Close()
+}
+
 func (m mockPeer) Id() string {
 	return "mockId"
 }
@@ -83,11 +90,13 @@ func newPushSpaceRequestMatcher(
 	spaceId string,
 	aclRootId string,
 	settingsId string,
+	credential []byte,
 	spaceHeader *spacesyncproto.RawSpaceHeaderWithId) *pushSpaceRequestMatcher {
 	return &pushSpaceRequestMatcher{
 		spaceId:     spaceId,
 		aclRootId:   aclRootId,
 		settingsId:  settingsId,
+		credential:  credential,
 		spaceHeader: spaceHeader,
 	}
 }
@@ -106,11 +115,12 @@ func TestDiffSyncer_Sync(t *testing.T) {
 	factory := spacesyncproto.ClientFactoryFunc(func(cc drpc.Conn) spacesyncproto.DRPCSpaceSyncClient {
 		return clientMock
 	})
+	credentialProvider := mock_credentialprovider.NewMockCredentialProvider(ctrl)
 	delState := mock_settingsstate.NewMockObjectDeletionState(ctrl)
 	spaceId := "spaceId"
 	aclRootId := "aclRootId"
 	l := logger.NewNamed(spaceId)
-	diffSyncer := newDiffSyncer(spaceId, diffMock, peerManagerMock, cacheMock, stMock, factory, syncstatus.NewNoOpSyncStatus(), l)
+	diffSyncer := newDiffSyncer(spaceId, diffMock, peerManagerMock, cacheMock, stMock, factory, syncstatus.NewNoOpSyncStatus(), credentialProvider, l)
 	delState.EXPECT().AddObserver(gomock.Any())
 	diffSyncer.Init(delState)
 
@@ -172,6 +182,7 @@ func TestDiffSyncer_Sync(t *testing.T) {
 		}
 		spaceHeader := &spacesyncproto.RawSpaceHeaderWithId{}
 		spaceSettingsId := "spaceSettingsId"
+		credential := []byte("credential")
 
 		peerManagerMock.EXPECT().
 			GetResponsiblePeers(gomock.Any()).
@@ -189,15 +200,18 @@ func TestDiffSyncer_Sync(t *testing.T) {
 		aclStorageMock.EXPECT().
 			Root().
 			Return(aclRoot, nil)
+		credentialProvider.EXPECT().
+			GetCredential(gomock.Any(), spaceHeader).
+			Return(credential, nil)
 		clientMock.EXPECT().
-			SpacePush(gomock.Any(), newPushSpaceRequestMatcher(spaceId, aclRootId, settingsId, spaceHeader)).
+			SpacePush(gomock.Any(), newPushSpaceRequestMatcher(spaceId, aclRootId, settingsId, credential, spaceHeader)).
 			Return(nil, nil)
 		peerManagerMock.EXPECT().SendPeer(gomock.Any(), "mockId", gomock.Any())
 
 		require.NoError(t, diffSyncer.Sync(ctx))
 	})
 
-	t.Run("diff syncer sync other error", func(t *testing.T) {
+	t.Run("diff syncer sync unexpected", func(t *testing.T) {
 		peerManagerMock.EXPECT().
 			GetResponsiblePeers(gomock.Any()).
 			Return([]peer.Peer{mockPeer{}}, nil)
@@ -207,4 +221,19 @@ func TestDiffSyncer_Sync(t *testing.T) {
 
 		require.NoError(t, diffSyncer.Sync(ctx))
 	})
+
+	t.Run("diff syncer sync space is deleted error", func(t *testing.T) {
+		peerManagerMock.EXPECT().
+			GetResponsiblePeers(gomock.Any()).
+			Return([]peer.Peer{mockPeer{}}, nil)
+		diffMock.EXPECT().
+			Diff(gomock.Any(), gomock.Eq(NewRemoteDiff(spaceId, clientMock))).
+			Return(nil, nil, nil, spacesyncproto.ErrSpaceIsDeleted)
+		stMock.EXPECT().SpaceSettingsId().Return("settingsId")
+		cacheMock.EXPECT().
+			GetTree(gomock.Any(), spaceId, "settingsId").
+			Return(nil, nil)
+
+		require.NoError(t, diffSyncer.Sync(ctx))
+	})
 }

commonspace/headsync/headsync.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"github.com/anytypeio/any-sync/app/ldiff"
 	"github.com/anytypeio/any-sync/app/logger"
+	"github.com/anytypeio/any-sync/commonspace/credentialprovider"
 	"github.com/anytypeio/any-sync/commonspace/object/treegetter"
 	"github.com/anytypeio/any-sync/commonspace/peermanager"
 	"github.com/anytypeio/any-sync/commonspace/settings/settingsstate"
@@ -60,12 +61,13 @@ func NewHeadSync(
 	peerManager peermanager.PeerManager,
 	cache treegetter.TreeGetter,
 	syncStatus syncstatus.StatusUpdater,
+	credentialProvider credentialprovider.CredentialProvider,
 	log logger.CtxLogger) HeadSync {
 
 	diff := ldiff.New(16, 16)
 	l := log.With(zap.String("spaceId", spaceId))
 	factory := spacesyncproto.ClientFactoryFunc(spacesyncproto.NewDRPCSpaceSyncClient)
-	syncer := newDiffSyncer(spaceId, diff, peerManager, cache, storage, factory, syncStatus, l)
+	syncer := newDiffSyncer(spaceId, diff, peerManager, cache, storage, factory, syncStatus, credentialProvider, l)
 	sync := func(ctx context.Context) (err error) {
 		// for clients cancelling the sync process
 		if spaceIsDeleted.Load() && !configuration.IsResponsible(spaceId) {

commonspace/object/acl/list/aclrecordbuilder.go

@@ -88,7 +88,7 @@ func (a *aclRecordBuilder) BuildUserJoin(acceptPrivKeyBytes []byte, encSymKeyByt
 		Identity:           state.Identity(),
 		Data:               marshalledJoin,
 		CurrentReadKeyHash: state.CurrentReadKeyHash(),
-		Timestamp:          time.Now().UnixNano(),
+		Timestamp:          time.Now().Unix(),
 	}
 	marshalledRecord, err := aclRecord.Marshal()
 	if err != nil {

commonspace/object/acl/list/aclstate.go

@@ -4,8 +4,10 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
+	"hash/fnv"
+
 	"github.com/anytypeio/any-sync/app/logger"
-	aclrecordproto "github.com/anytypeio/any-sync/commonspace/object/acl/aclrecordproto"
+	"github.com/anytypeio/any-sync/commonspace/object/acl/aclrecordproto"
 	"github.com/anytypeio/any-sync/commonspace/object/keychain"
 	"github.com/anytypeio/any-sync/util/keys"
 	"github.com/anytypeio/any-sync/util/keys/asymmetric/encryptionkey"
@@ -13,10 +15,9 @@ import (
 	"github.com/anytypeio/any-sync/util/keys/symmetric"
 	"github.com/gogo/protobuf/proto"
 	"go.uber.org/zap"
-	"hash/fnv"
 )
 
-var log = logger.NewNamed("acllist").Sugar()
+var log = logger.NewNamedSugared("common.commonspace.acllist")
 
 var (
 	ErrNoSuchUser              = errors.New("no such user")

commonspace/object/acl/testutils/acllistbuilder/liststoragebuilder.go

@@ -126,7 +126,7 @@ func (t *AclListStorageBuilder) parseRecord(rec *Record, prevId string) *aclreco
 		Identity:           []byte(t.keychain.GetIdentity(rec.Identity)),
 		Data:               bytes,
 		CurrentReadKeyHash: k.Hash,
-		Timestamp:          time.Now().UnixNano(),
+		Timestamp:          time.Now().Unix(),
 	}
 }
 

commonspace/object/tree/objecttree/change.go

@@ -3,6 +3,7 @@ package objecttree
 import (
 	"errors"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/treechangeproto"
+	"github.com/gogo/protobuf/proto"
 )
 
 var (
@@ -48,6 +49,11 @@ func NewChange(id string, ch *treechangeproto.TreeChange, signature []byte) *Cha
 }
 
 func NewChangeFromRoot(id string, ch *treechangeproto.RootChange, signature []byte) *Change {
+	changeInfo := &treechangeproto.TreeChangeInfo{
+		ChangeType:    ch.ChangeType,
+		ChangePayload: ch.ChangePayload,
+	}
+	data, _ := proto.Marshal(changeInfo)
 	return &Change{
 		Next:       nil,
 		AclHeadId:  ch.AclHeadId,
@@ -56,7 +62,8 @@ func NewChangeFromRoot(id string, ch *treechangeproto.RootChange, signature []by
 		Timestamp:  ch.Timestamp,
 		Identity:   string(ch.Identity),
 		Signature:  signature,
-		Data:       []byte(ch.ChangeType),
+		Data:       data,
+		Model:      changeInfo,
 	}
 }
 

commonspace/object/tree/objecttree/changebuilder.go

@@ -32,6 +32,7 @@ type InitialContent struct {
 	SpaceId       string
 	Seed          []byte
 	ChangeType    string
+	ChangePayload []byte
 	Timestamp     int64
 }
 
@@ -126,37 +127,31 @@ func (c *changeBuilder) BuildRoot(payload InitialContent) (ch *Change, rawIdChan
 		Timestamp:     payload.Timestamp,
 		Identity:      payload.Identity,
 		ChangeType:    payload.ChangeType,
+		ChangePayload: payload.ChangePayload,
 		SpaceId:       payload.SpaceId,
 		Seed:          payload.Seed,
 	}
-
 	marshalledChange, err := proto.Marshal(change)
 	if err != nil {
 		return
 	}
-
 	signature, err := payload.SigningKey.Sign(marshalledChange)
 	if err != nil {
 		return
 	}
-
 	raw := &treechangeproto.RawTreeChange{
 		Payload:   marshalledChange,
 		Signature: signature,
 	}
-
 	marshalledRawChange, err := proto.Marshal(raw)
 	if err != nil {
 		return
 	}
-
 	id, err := cidutil.NewCidFromBytes(marshalledRawChange)
 	if err != nil {
 		return
 	}
-
 	ch = NewChangeFromRoot(id, change, signature)
-
 	rawIdChange = &treechangeproto.RawTreeChangeWithId{
 		RawChange: marshalledRawChange,
 		Id:        id,
@@ -170,7 +165,7 @@ func (c *changeBuilder) Build(payload BuilderContent) (ch *Change, rawIdChange *
 		AclHeadId:          payload.AclHeadId,
 		SnapshotBaseId:     payload.SnapshotBaseId,
 		CurrentReadKeyHash: payload.CurrentReadKeyHash,
-		Timestamp:          time.Now().UnixNano(),
+		Timestamp:          time.Now().Unix(),
 		Identity:           payload.Identity,
 		IsSnapshot:         payload.IsSnapshot,
 	}
@@ -184,34 +179,27 @@ func (c *changeBuilder) Build(payload BuilderContent) (ch *Change, rawIdChange *
 	} else {
 		change.ChangesData = payload.Content
 	}
-
 	marshalledChange, err := proto.Marshal(change)
 	if err != nil {
 		return
 	}
-
 	signature, err := payload.SigningKey.Sign(marshalledChange)
 	if err != nil {
 		return
 	}
-
 	raw := &treechangeproto.RawTreeChange{
 		Payload:   marshalledChange,
 		Signature: signature,
 	}
-
 	marshalledRawChange, err := proto.Marshal(raw)
 	if err != nil {
 		return
 	}
-
 	id, err := cidutil.NewCidFromBytes(marshalledRawChange)
 	if err != nil {
 		return
 	}
-
 	ch = NewChange(id, change, signature)
-
 	rawIdChange = &treechangeproto.RawTreeChangeWithId{
 		RawChange: marshalledRawChange,
 		Id:        id,
@@ -220,7 +208,7 @@ func (c *changeBuilder) Build(payload BuilderContent) (ch *Change, rawIdChange *
 }
 
 func (c *changeBuilder) Marshall(ch *Change) (raw *treechangeproto.RawTreeChangeWithId, err error) {
-	if ch.Id == c.rootChange.Id {
+	if c.isRoot(ch.Id) {
 		return c.rootChange, nil
 	}
 	treeChange := &treechangeproto.TreeChange{
@@ -255,7 +243,7 @@ func (c *changeBuilder) Marshall(ch *Change) (raw *treechangeproto.RawTreeChange
 }
 
 func (c *changeBuilder) unmarshallRawChange(raw *treechangeproto.RawTreeChange, id string) (ch *Change, err error) {
-	if c.rootChange.Id == id {
+	if c.isRoot(id) {
 		unmarshalled := &treechangeproto.RootChange{}
 		err = proto.Unmarshal(raw.Payload, unmarshalled)
 		if err != nil {
@@ -264,7 +252,6 @@ func (c *changeBuilder) unmarshallRawChange(raw *treechangeproto.RawTreeChange,
 		ch = NewChangeFromRoot(id, unmarshalled, raw.Signature)
 		return
 	}
-
 	unmarshalled := &treechangeproto.TreeChange{}
 	err = proto.Unmarshal(raw.Payload, unmarshalled)
 	if err != nil {
@@ -274,3 +261,10 @@ func (c *changeBuilder) unmarshallRawChange(raw *treechangeproto.RawTreeChange,
 	ch = NewChange(id, unmarshalled, raw.Signature)
 	return
 }
+
+func (c *changeBuilder) isRoot(id string) bool {
+	if c.rootChange != nil {
+		return c.rootChange.Id == id
+	}
+	return false
+}

commonspace/object/tree/objecttree/mock_objecttree/mock_objecttree.go

@@ -7,6 +7,7 @@ package mock_objecttree
 import (
 	context "context"
 	reflect "reflect"
+	time "time"
 
 	list "github.com/anytypeio/any-sync/commonspace/object/acl/list"
 	objecttree "github.com/anytypeio/any-sync/commonspace/object/tree/objecttree"
@@ -82,6 +83,20 @@ func (mr *MockObjectTreeMockRecorder) AddRawChanges(arg0, arg1 interface{}) *gom
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddRawChanges", reflect.TypeOf((*MockObjectTree)(nil).AddRawChanges), arg0, arg1)
 }
 
+// ChangeInfo mocks base method.
+func (m *MockObjectTree) ChangeInfo() *treechangeproto.TreeChangeInfo {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "ChangeInfo")
+	ret0, _ := ret[0].(*treechangeproto.TreeChangeInfo)
+	return ret0
+}
+
+// ChangeInfo indicates an expected call of ChangeInfo.
+func (mr *MockObjectTreeMockRecorder) ChangeInfo() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ChangeInfo", reflect.TypeOf((*MockObjectTree)(nil).ChangeInfo))
+}
+
 // ChangesAfterCommonSnapshot mocks base method.
 func (m *MockObjectTree) ChangesAfterCommonSnapshot(arg0, arg1 []string) ([]*treechangeproto.RawTreeChangeWithId, error) {
 	m.ctrl.T.Helper()
@@ -336,6 +351,21 @@ func (mr *MockObjectTreeMockRecorder) Storage() *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Storage", reflect.TypeOf((*MockObjectTree)(nil).Storage))
 }
 
+// TryClose mocks base method.
+func (m *MockObjectTree) TryClose(arg0 time.Duration) (bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "TryClose", arg0)
+	ret0, _ := ret[0].(bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// TryClose indicates an expected call of TryClose.
+func (mr *MockObjectTreeMockRecorder) TryClose(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "TryClose", reflect.TypeOf((*MockObjectTree)(nil).TryClose), arg0)
+}
+
 // TryLock mocks base method.
 func (m *MockObjectTree) TryLock() bool {
 	m.ctrl.T.Helper()

commonspace/object/tree/objecttree/objecttree.go

@@ -5,6 +5,7 @@ import (
 	"context"
 	"errors"
 	"sync"
+	"time"
 
 	"github.com/anytypeio/any-sync/commonspace/object/acl/aclrecordproto"
 	"github.com/anytypeio/any-sync/commonspace/object/acl/list"
@@ -52,6 +53,7 @@ type ReadableObjectTree interface {
 	Id() string
 	Header() *treechangeproto.RawTreeChangeWithId
 	UnmarshalledHeader() *Change
+	ChangeInfo() *treechangeproto.TreeChangeInfo
 	Heads() []string
 	Root() *Change
 
@@ -81,6 +83,7 @@ type ObjectTree interface {
 
 	Delete() error
 	Close() error
+	TryClose(objectTTL time.Duration) (bool, error)
 }
 
 type objectTree struct {
@@ -142,6 +145,10 @@ func (ot *objectTree) UnmarshalledHeader() *Change {
 	return ot.root
 }
 
+func (ot *objectTree) ChangeInfo() *treechangeproto.TreeChangeInfo {
+	return ot.root.Model.(*treechangeproto.TreeChangeInfo)
+}
+
 func (ot *objectTree) Storage() treestorage.TreeStorage {
 	return ot.treeStorage
 }
@@ -555,6 +562,10 @@ func (ot *objectTree) Root() *Change {
 	return ot.tree.Root()
 }
 
+func (ot *objectTree) TryClose(objectTTL time.Duration) (bool, error) {
+	return true, ot.Close()
+}
+
 func (ot *objectTree) Close() error {
 	return nil
 }

commonspace/object/tree/objecttree/objecttreefactory.go

@@ -14,6 +14,7 @@ import (
 type ObjectTreeCreatePayload struct {
 	SignKey       signingkey.PrivKey
 	ChangeType    string
+	ChangePayload []byte
 	SpaceId       string
 	Identity      []byte
 	IsEncrypted   bool
@@ -75,7 +76,7 @@ func CreateObjectTreeRoot(payload ObjectTreeCreatePayload, aclList list.AclList)
 	if err != nil {
 		return
 	}
-	return createObjectTreeRoot(payload, time.Now().UnixNano(), bytes, aclList)
+	return createObjectTreeRoot(payload, time.Now().Unix(), bytes, aclList)
 }
 
 func DeriveObjectTreeRoot(payload ObjectTreeCreatePayload, aclList list.AclList) (root *treechangeproto.RawTreeChangeWithId, err error) {
@@ -125,7 +126,7 @@ func CreateObjectTree(
 	if err != nil {
 		return
 	}
-	return createObjectTree(payload, time.Now().UnixNano(), bytes, aclList, createStorage)
+	return createObjectTree(payload, time.Now().Unix(), bytes, aclList, createStorage)
 }
 
 func createObjectTree(
@@ -170,6 +171,7 @@ func createObjectTreeRoot(
 		SigningKey:    payload.SignKey,
 		SpaceId:       payload.SpaceId,
 		ChangeType:    payload.ChangeType,
+		ChangePayload: payload.ChangePayload,
 		Timestamp:     timestamp,
 		Seed:          seed,
 	}

commonspace/object/tree/objecttree/tree_test.go

@@ -125,7 +125,7 @@ func TestTree_Hash(t *testing.T) {
 }
 
 func TestTree_AddFuzzy(t *testing.T) {
-	rand.Seed(time.Now().UnixNano())
+	rand.Seed(time.Now().Unix())
 	getChanges := func() []*Change {
 		changes := []*Change{
 			newChange("1", "root", "root"),

commonspace/object/tree/objecttree/treebuilder.go

@@ -4,15 +4,16 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"time"
+
 	"github.com/anytypeio/any-sync/app/logger"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/treestorage"
 	"github.com/anytypeio/any-sync/util/slice"
 	"go.uber.org/zap"
-	"time"
 )
 
 var (
-	log      = logger.NewNamed("acltree").Sugar()
+	log      = logger.NewNamedSugared("common.commonspace.objecttree")
 	ErrEmpty = errors.New("logs empty")
 )
 

commonspace/object/tree/synctree/mock_synctree/mock_synctree.go

@@ -7,6 +7,7 @@ package mock_synctree
 import (
 	context "context"
 	reflect "reflect"
+	time "time"
 
 	list "github.com/anytypeio/any-sync/commonspace/object/acl/list"
 	objecttree "github.com/anytypeio/any-sync/commonspace/object/tree/objecttree"
@@ -193,6 +194,20 @@ func (mr *MockSyncTreeMockRecorder) AddRawChanges(arg0, arg1 interface{}) *gomoc
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddRawChanges", reflect.TypeOf((*MockSyncTree)(nil).AddRawChanges), arg0, arg1)
 }
 
+// ChangeInfo mocks base method.
+func (m *MockSyncTree) ChangeInfo() *treechangeproto.TreeChangeInfo {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "ChangeInfo")
+	ret0, _ := ret[0].(*treechangeproto.TreeChangeInfo)
+	return ret0
+}
+
+// ChangeInfo indicates an expected call of ChangeInfo.
+func (mr *MockSyncTreeMockRecorder) ChangeInfo() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ChangeInfo", reflect.TypeOf((*MockSyncTree)(nil).ChangeInfo))
+}
+
 // ChangesAfterCommonSnapshot mocks base method.
 func (m *MockSyncTree) ChangesAfterCommonSnapshot(arg0, arg1 []string) ([]*treechangeproto.RawTreeChangeWithId, error) {
 	m.ctrl.T.Helper()
@@ -487,6 +502,21 @@ func (mr *MockSyncTreeMockRecorder) SyncWithPeer(arg0, arg1 interface{}) *gomock
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SyncWithPeer", reflect.TypeOf((*MockSyncTree)(nil).SyncWithPeer), arg0, arg1)
 }
 
+// TryClose mocks base method.
+func (m *MockSyncTree) TryClose(arg0 time.Duration) (bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "TryClose", arg0)
+	ret0, _ := ret[0].(bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// TryClose indicates an expected call of TryClose.
+func (mr *MockSyncTreeMockRecorder) TryClose(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "TryClose", reflect.TypeOf((*MockSyncTree)(nil).TryClose), arg0)
+}
+
 // TryLock mocks base method.
 func (m *MockSyncTree) TryLock() bool {
 	m.ctrl.T.Helper()

commonspace/object/tree/synctree/synctree.go

@@ -3,6 +3,8 @@ package synctree
 import (
 	"context"
 	"errors"
+	"time"
+
 	"github.com/anytypeio/any-sync/app/logger"
 	"github.com/anytypeio/any-sync/commonspace/object/acl/list"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/objecttree"
@@ -10,7 +12,7 @@ import (
 	"github.com/anytypeio/any-sync/commonspace/object/tree/treestorage"
 	"github.com/anytypeio/any-sync/commonspace/objectsync"
 	"github.com/anytypeio/any-sync/commonspace/objectsync/synchandler"
-	spacestorage "github.com/anytypeio/any-sync/commonspace/spacestorage"
+	"github.com/anytypeio/any-sync/commonspace/spacestorage"
 	"github.com/anytypeio/any-sync/commonspace/syncstatus"
 	"github.com/anytypeio/any-sync/net/peer"
 	"github.com/anytypeio/any-sync/nodeconf"
@@ -50,7 +52,7 @@ type syncTree struct {
 	isDeleted  bool
 }
 
-var log = logger.NewNamed("commonspace.synctree")
+var log = logger.NewNamed("common.commonspace.synctree")
 
 var buildObjectTree = objecttree.BuildObjectTree
 var createSyncClient = newSyncClient
@@ -208,6 +210,10 @@ func (s *syncTree) Delete() (err error) {
 	return
 }
 
+func (s *syncTree) TryClose(objectTTL time.Duration) (bool, error) {
+	return true, s.Close()
+}
+
 func (s *syncTree) Close() (err error) {
 	log.Debug("closing sync tree", zap.String("id", s.Id()))
 	defer func() {

commonspace/object/tree/treechangeproto/protos/treechange.proto

@@ -16,6 +16,8 @@ message RootChange {
   bytes seed = 5;
   // Identity is a public key of the tree's creator
   bytes identity = 6;
+  // ChangePayload is a payload related to ChangeType
+  bytes changePayload = 7;
 }
 
 // TreeChange is a change of a tree
@@ -94,3 +96,9 @@ message TreeFullSyncResponse {
 message TreeErrorResponse {
   string error = 1;
 }
+
+// TreeChangeInfo is used internally in Tree implementation for ease of marshalling
+message TreeChangeInfo {
+  string changeType = 1;
+  bytes changePayload = 2;
+}

commonspace/object/tree/treechangeproto/treechange.pb.go

@@ -36,6 +36,8 @@ type RootChange struct {
 	Seed []byte `protobuf:"bytes,5,opt,name=seed,proto3" json:"seed,omitempty"`
 	// Identity is a public key of the tree's creator
 	Identity []byte `protobuf:"bytes,6,opt,name=identity,proto3" json:"identity,omitempty"`
+	// ChangePayload is a payload related to ChangeType
+	ChangePayload []byte `protobuf:"bytes,7,opt,name=changePayload,proto3" json:"changePayload,omitempty"`
 }
 
 func (m *RootChange) Reset()         { *m = RootChange{} }
@@ -113,6 +115,13 @@ func (m *RootChange) GetIdentity() []byte {
 	return nil
 }
 
+func (m *RootChange) GetChangePayload() []byte {
+	if m != nil {
+		return m.ChangePayload
+	}
+	return nil
+}
+
 // TreeChange is a change of a tree
 type TreeChange struct {
 	// TreeHeadIds are previous ids for this TreeChange
@@ -725,6 +734,59 @@ func (m *TreeErrorResponse) GetError() string {
 	return ""
 }
 
+// TreeChangeInfo is used internally in Tree implementation for ease of marshalling
+type TreeChangeInfo struct {
+	ChangeType    string `protobuf:"bytes,1,opt,name=changeType,proto3" json:"changeType,omitempty"`
+	ChangePayload []byte `protobuf:"bytes,2,opt,name=changePayload,proto3" json:"changePayload,omitempty"`
+}
+
+func (m *TreeChangeInfo) Reset()         { *m = TreeChangeInfo{} }
+func (m *TreeChangeInfo) String() string { return proto.CompactTextString(m) }
+func (*TreeChangeInfo) ProtoMessage()    {}
+func (*TreeChangeInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_5033f0301ef9b772, []int{10}
+}
+func (m *TreeChangeInfo) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *TreeChangeInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_TreeChangeInfo.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *TreeChangeInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_TreeChangeInfo.Merge(m, src)
+}
+func (m *TreeChangeInfo) XXX_Size() int {
+	return m.Size()
+}
+func (m *TreeChangeInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_TreeChangeInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_TreeChangeInfo proto.InternalMessageInfo
+
+func (m *TreeChangeInfo) GetChangeType() string {
+	if m != nil {
+		return m.ChangeType
+	}
+	return ""
+}
+
+func (m *TreeChangeInfo) GetChangePayload() []byte {
+	if m != nil {
+		return m.ChangePayload
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*RootChange)(nil), "treechange.RootChange")
 	proto.RegisterType((*TreeChange)(nil), "treechange.TreeChange")
@@ -736,6 +798,7 @@ func init() {
 	proto.RegisterType((*TreeFullSyncRequest)(nil), "treechange.TreeFullSyncRequest")
 	proto.RegisterType((*TreeFullSyncResponse)(nil), "treechange.TreeFullSyncResponse")
 	proto.RegisterType((*TreeErrorResponse)(nil), "treechange.TreeErrorResponse")
+	proto.RegisterType((*TreeChangeInfo)(nil), "treechange.TreeChangeInfo")
 }
 
 func init() {
@@ -743,48 +806,51 @@ func init() {
 }
 
 var fileDescriptor_5033f0301ef9b772 = []byte{
-	// 656 bytes of a gzipped FileDescriptorProto
+	// 690 bytes of a gzipped FileDescriptorProto
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+	0x36, 0xaf, 0x7e, 0x9e, 0xfe, 0x0d, 0x00, 0x00, 0xff, 0xff, 0x24, 0x93, 0x3b, 0x00, 0x1f, 0x07,
+	0x00, 0x00,
 }
 
 func (m *RootChange) Marshal() (dAtA []byte, err error) {
@@ -807,6 +873,13 @@ func (m *RootChange) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.ChangePayload) > 0 {
+		i -= len(m.ChangePayload)
+		copy(dAtA[i:], m.ChangePayload)
+		i = encodeVarintTreechange(dAtA, i, uint64(len(m.ChangePayload)))
+		i--
+		dAtA[i] = 0x3a
+	}
 	if len(m.Identity) > 0 {
 		i -= len(m.Identity)
 		copy(dAtA[i:], m.Identity)
@@ -1362,6 +1435,43 @@ func (m *TreeErrorResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	return len(dAtA) - i, nil
 }
 
+func (m *TreeChangeInfo) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *TreeChangeInfo) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *TreeChangeInfo) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.ChangePayload) > 0 {
+		i -= len(m.ChangePayload)
+		copy(dAtA[i:], m.ChangePayload)
+		i = encodeVarintTreechange(dAtA, i, uint64(len(m.ChangePayload)))
+		i--
+		dAtA[i] = 0x12
+	}
+	if len(m.ChangeType) > 0 {
+		i -= len(m.ChangeType)
+		copy(dAtA[i:], m.ChangeType)
+		i = encodeVarintTreechange(dAtA, i, uint64(len(m.ChangeType)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
 func encodeVarintTreechange(dAtA []byte, offset int, v uint64) int {
 	offset -= sovTreechange(v)
 	base := offset
@@ -1402,6 +1512,10 @@ func (m *RootChange) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovTreechange(uint64(l))
 	}
+	l = len(m.ChangePayload)
+	if l > 0 {
+		n += 1 + l + sovTreechange(uint64(l))
+	}
 	return n
 }
 
@@ -1650,6 +1764,23 @@ func (m *TreeErrorResponse) Size() (n int) {
 	return n
 }
 
+func (m *TreeChangeInfo) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.ChangeType)
+	if l > 0 {
+		n += 1 + l + sovTreechange(uint64(l))
+	}
+	l = len(m.ChangePayload)
+	if l > 0 {
+		n += 1 + l + sovTreechange(uint64(l))
+	}
+	return n
+}
+
 func sovTreechange(x uint64) (n int) {
 	return (math_bits.Len64(x|1) + 6) / 7
 }
@@ -1868,6 +1999,40 @@ func (m *RootChange) Unmarshal(dAtA []byte) error {
 				m.Identity = []byte{}
 			}
 			iNdEx = postIndex
+		case 7:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ChangePayload", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTreechange
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ChangePayload = append(m.ChangePayload[:0], dAtA[iNdEx:postIndex]...)
+			if m.ChangePayload == nil {
+				m.ChangePayload = []byte{}
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipTreechange(dAtA[iNdEx:])
@@ -3233,6 +3398,122 @@ func (m *TreeErrorResponse) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *TreeChangeInfo) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowTreechange
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: TreeChangeInfo: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: TreeChangeInfo: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ChangeType", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTreechange
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ChangeType = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field ChangePayload", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTreechange
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.ChangePayload = append(m.ChangePayload[:0], dAtA[iNdEx:postIndex]...)
+			if m.ChangePayload == nil {
+				m.ChangePayload = []byte{}
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipTreechange(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthTreechange
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func skipTreechange(dAtA []byte) (n int, err error) {
 	l := len(dAtA)
 	iNdEx := 0

commonspace/objectsync/msgpool.go

@@ -3,7 +3,6 @@ package objectsync
 import (
 	"context"
 	"fmt"
-	"github.com/anytypeio/any-sync/app/ocache"
 	"github.com/anytypeio/any-sync/commonspace/objectsync/synchandler"
 	"github.com/anytypeio/any-sync/commonspace/peermanager"
 	"github.com/anytypeio/any-sync/commonspace/spacesyncproto"
@@ -15,9 +14,13 @@ import (
 	"time"
 )
 
+type LastUsage interface {
+	LastUsage() time.Time
+}
+
 // MessagePool can be made generic to work with different streams
 type MessagePool interface {
-	ocache.ObjectLastUsage
+	LastUsage
 	synchandler.SyncHandler
 	peermanager.PeerManager
 	SendSync(ctx context.Context, peerId string, message *spacesyncproto.ObjectSyncMessage) (reply *spacesyncproto.ObjectSyncMessage, err error)

commonspace/objectsync/objectsync.go

@@ -2,23 +2,24 @@ package objectsync
 
 import (
 	"context"
+	"sync/atomic"
+	"time"
+
 	"github.com/anytypeio/any-sync/app/logger"
-	"github.com/anytypeio/any-sync/app/ocache"
 	"github.com/anytypeio/any-sync/commonspace/object/syncobjectgetter"
 	"github.com/anytypeio/any-sync/commonspace/objectsync/synchandler"
 	"github.com/anytypeio/any-sync/commonspace/peermanager"
+	"github.com/anytypeio/any-sync/commonspace/spacestorage"
 	"github.com/anytypeio/any-sync/commonspace/spacesyncproto"
 	"github.com/anytypeio/any-sync/nodeconf"
 	"go.uber.org/zap"
 	"golang.org/x/exp/slices"
-	"sync/atomic"
-	"time"
 )
 
-var log = logger.NewNamed("commonspace.objectsync")
+var log = logger.NewNamed("common.commonspace.objectsync")
 
 type ObjectSync interface {
-	ocache.ObjectLastUsage
+	LastUsage
 	synchandler.SyncHandler
 	MessagePool() MessagePool
 
@@ -32,6 +33,7 @@ type objectSync struct {
 	messagePool   MessagePool
 	objectGetter  syncobjectgetter.SyncObjectGetter
 	configuration nodeconf.Configuration
+	spaceStorage  spacestorage.SpaceStorage
 
 	syncCtx        context.Context
 	cancelSync     context.CancelFunc
@@ -43,13 +45,15 @@ func NewObjectSync(
 	spaceIsDeleted *atomic.Bool,
 	configuration nodeconf.Configuration,
 	peerManager peermanager.PeerManager,
-	objectGetter syncobjectgetter.SyncObjectGetter) ObjectSync {
+	objectGetter syncobjectgetter.SyncObjectGetter,
+	storage spacestorage.SpaceStorage) ObjectSync {
 	syncCtx, cancel := context.WithCancel(context.Background())
 	os := newObjectSync(
 		spaceId,
 		spaceIsDeleted,
 		configuration,
 		objectGetter,
+		storage,
 		syncCtx,
 		cancel)
 	msgPool := newMessagePool(peerManager, os.handleMessage)
@@ -62,11 +66,13 @@ func newObjectSync(
 	spaceIsDeleted *atomic.Bool,
 	configuration nodeconf.Configuration,
 	objectGetter syncobjectgetter.SyncObjectGetter,
+	spaceStorage spacestorage.SpaceStorage,
 	syncCtx context.Context,
 	cancel context.CancelFunc,
 ) *objectSync {
 	return &objectSync{
 		objectGetter:   objectGetter,
+		spaceStorage:   spaceStorage,
 		spaceId:        spaceId,
 		syncCtx:        syncCtx,
 		cancelSync:     cancel,
@@ -95,8 +101,8 @@ func (s *objectSync) handleMessage(ctx context.Context, senderId string, msg *sp
 	log := log.With(zap.String("objectId", msg.ObjectId), zap.String("replyId", msg.ReplyId))
 	if s.spaceIsDeleted.Load() {
 		log = log.With(zap.Bool("isDeleted", true))
-		// preventing sync with other clients
+		// preventing sync with other clients if they are not just syncing the settings tree
-		if !slices.Contains(s.configuration.NodeIds(s.spaceId), senderId) {
+		if !slices.Contains(s.configuration.NodeIds(s.spaceId), senderId) && msg.ObjectId != s.spaceStorage.SpaceSettingsId() {
 			return spacesyncproto.ErrSpaceIsDeleted
 		}
 	}

commonspace/payloads.go

@@ -14,7 +14,7 @@ import (
 )
 
 const (
-	SpaceSettingsChangeType = "reserved.spacesettings"
+	SpaceReserved         = "any-sync.space"
 	SpaceDerivationScheme = "derivation.standard"
 )
 
@@ -37,8 +37,9 @@ func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload sp
 	}
 	header := &spacesyncproto.SpaceHeader{
 		Identity:           identity,
-		Timestamp:      time.Now().UnixNano(),
+		Timestamp:          time.Now().Unix(),
 		SpaceType:          payload.SpaceType,
+		SpaceHeaderPayload: payload.SpacePayload,
 		ReplicationKey:     payload.ReplicationKey,
 		Seed:               spaceHeaderSeed,
 	}
@@ -81,7 +82,7 @@ func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload sp
 		SpaceId:            spaceId,
 		EncryptedReadKey:   encReadKey,
 		CurrentReadKeyHash: readKeyHash,
-		Timestamp:          time.Now().UnixNano(),
+		Timestamp:          time.Now().Unix(),
 	}
 	rawWithId, err := marshalAclRoot(aclRoot, payload.SigningKey)
 	if err != nil {
@@ -101,8 +102,8 @@ func storagePayloadForSpaceCreate(payload SpaceCreatePayload) (storagePayload sp
 		SigningKey: payload.SigningKey,
 		SpaceId:    spaceId,
 		Seed:       spaceSettingsSeed,
-		ChangeType: SpaceSettingsChangeType,
+		ChangeType: SpaceReserved,
-		Timestamp:  time.Now().UnixNano(),
+		Timestamp:  time.Now().Unix(),
 	})
 	if err != nil {
 		return
@@ -147,7 +148,8 @@ func storagePayloadForSpaceDerive(payload SpaceDerivePayload) (storagePayload sp
 	// preparing header and space id
 	header := &spacesyncproto.SpaceHeader{
 		Identity:           identity,
-		SpaceType:      SpaceTypeDerived,
+		SpaceType:          payload.SpaceType,
+		SpaceHeaderPayload: payload.SpacePayload,
 		ReplicationKey:     repKey,
 	}
 	marshalled, err := header.Marshal()
@@ -201,7 +203,7 @@ func storagePayloadForSpaceDerive(payload SpaceDerivePayload) (storagePayload sp
 		Identity:   aclRoot.Identity,
 		SigningKey: payload.SigningKey,
 		SpaceId:    spaceId,
-		ChangeType: SpaceSettingsChangeType,
+		ChangeType: SpaceReserved,
 	})
 	if err != nil {
 		return

commonspace/settings/settings.go

@@ -5,15 +5,17 @@ import (
 	"context"
 	"errors"
 	"fmt"
+
 	"github.com/anytypeio/any-sync/accountservice"
 	"github.com/anytypeio/any-sync/app/logger"
+	"github.com/anytypeio/any-sync/commonspace/object/keychain"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/objecttree"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/synctree"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/synctree/updatelistener"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/treechangeproto"
 	"github.com/anytypeio/any-sync/commonspace/object/treegetter"
 	"github.com/anytypeio/any-sync/commonspace/settings/settingsstate"
-	spacestorage "github.com/anytypeio/any-sync/commonspace/spacestorage"
+	"github.com/anytypeio/any-sync/commonspace/spacestorage"
 	"github.com/anytypeio/any-sync/commonspace/spacesyncproto"
 	"github.com/anytypeio/any-sync/nodeconf"
 	"github.com/gogo/protobuf/proto"
@@ -242,17 +244,7 @@ func (s *settingsObject) verifyDeleteSpace(raw *treechangeproto.RawTreeChangeWit
 	if err != nil {
 		return
 	}
-	content := &spacesyncproto.SettingsData{}
+	return verifyDeleteContent(data, "")
-	err = proto.Unmarshal(data, content)
-	if err != nil {
-		return
-	}
-	if len(content.GetContent()) != 1 ||
-		content.GetContent()[0].GetSpaceDelete() == nil ||
-		content.GetContent()[0].GetSpaceDelete().GetDeleterPeerId() == "" {
-		return fmt.Errorf("incorrect delete change payload")
-	}
-	return
 }
 
 func (s *settingsObject) addContent(data []byte) (err error) {
@@ -271,3 +263,30 @@ func (s *settingsObject) addContent(data []byte) (err error) {
 	s.Update(s)
 	return
 }
+
+func VerifyDeleteChange(raw *treechangeproto.RawTreeChangeWithId, identity []byte, peerId string) (err error) {
+	changeBuilder := objecttree.NewChangeBuilder(keychain.NewKeychain(), nil)
+	res, err := changeBuilder.Unmarshall(raw, true)
+	if err != nil {
+		return
+	}
+	if res.Identity != string(identity) {
+		return fmt.Errorf("incorrect identity")
+	}
+	return verifyDeleteContent(res.Data, peerId)
+}
+
+func verifyDeleteContent(data []byte, peerId string) (err error) {
+	content := &spacesyncproto.SettingsData{}
+	err = proto.Unmarshal(data, content)
+	if err != nil {
+		return
+	}
+	if len(content.GetContent()) != 1 ||
+		content.GetContent()[0].GetSpaceDelete() == nil ||
+		(peerId == "" && content.GetContent()[0].GetSpaceDelete().GetDeleterPeerId() == "") ||
+		(peerId != "" && content.GetContent()[0].GetSpaceDelete().GetDeleterPeerId() != peerId) {
+		return fmt.Errorf("incorrect delete change payload")
+	}
+	return
+}

commonspace/settings/settingsstate/statebuilder.go

@@ -48,7 +48,7 @@ func (s *stateBuilder) Build(tr objecttree.ObjectTree, oldState *State) (state *
 
 func (s *stateBuilder) processChange(change *objecttree.Change, rootId string, state *State) *State {
 	// ignoring root change which has empty model or startId change
-	if change.Model == nil || state.LastIteratedId == change.Id {
+	if len(change.PreviousIds) == 0 || state.LastIteratedId == change.Id {
 		return state
 	}
 

commonspace/settings/settingsstate/statebuilder_test.go

@@ -42,6 +42,7 @@ func TestStateBuilder_ProcessChange(t *testing.T) {
 
 	t.Run("changeId is equal to rootId", func(t *testing.T) {
 		ch := &objecttree.Change{}
+		ch.PreviousIds = []string{"someId"}
 		ch.Model = &spacesyncproto.SettingsData{
 			Snapshot: &spacesyncproto.SpaceSettingsSnapshot{
 				DeletedIds:    []string{"id1", "id2"},
@@ -56,6 +57,7 @@ func TestStateBuilder_ProcessChange(t *testing.T) {
 
 	t.Run("changeId is not equal to lastIteratedId or rootId", func(t *testing.T) {
 		ch := &objecttree.Change{}
+		ch.PreviousIds = []string{"someId"}
 		ch.Model = &spacesyncproto.SettingsData{
 			Content: []*spacesyncproto.SpaceSettingsContent{
 				{Value: &spacesyncproto.SpaceSettingsContent_ObjectDelete{

commonspace/space.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"github.com/anytypeio/any-sync/accountservice"
 	"github.com/anytypeio/any-sync/app/logger"
-	"github.com/anytypeio/any-sync/app/ocache"
 	"github.com/anytypeio/any-sync/commonspace/headsync"
 	"github.com/anytypeio/any-sync/commonspace/object/acl/list"
 	"github.com/anytypeio/any-sync/commonspace/object/acl/syncacl"
@@ -52,6 +51,8 @@ type SpaceCreatePayload struct {
 	ReadKey []byte
 	// ReplicationKey is a key which is to be used to determine the node where the space should be held
 	ReplicationKey uint64
+	// SpacePayload is an arbitrary payload related to space type
+	SpacePayload []byte
 }
 
 type HandleMessage struct {
@@ -61,11 +62,11 @@ type HandleMessage struct {
 	Message  *spacesyncproto.ObjectSyncMessage
 }
 
-const SpaceTypeDerived = "derived.space"
-
 type SpaceDerivePayload struct {
 	SigningKey    signingkey.PrivKey
 	EncryptionKey encryptionkey.PrivKey
+	SpaceType     string
+	SpacePayload  []byte
 }
 
 type SpaceDescription struct {
@@ -81,9 +82,6 @@ func NewSpaceId(id string, repKey uint64) string {
 }
 
 type Space interface {
-	ocache.ObjectLocker
-	ocache.ObjectLastUsage
-
 	Id() string
 	Init(ctx context.Context) error
 
@@ -108,6 +106,7 @@ type Space interface {
 
 	HandleMessage(ctx context.Context, msg HandleMessage) (err error)
 
+	TryClose(objectTTL time.Duration) (close bool, err error)
 	Close() error
 }
 
@@ -134,16 +133,6 @@ type space struct {
 	treesUsed *atomic.Int32
 }
 
-func (s *space) LastUsage() time.Time {
-	return s.objectSync.LastUsage()
-}
-
-func (s *space) Locked() bool {
-	locked := s.treesUsed.Load() > 1
-	log.With(zap.Int32("trees used", s.treesUsed.Load()), zap.Bool("locked", locked), zap.String("spaceId", s.id)).Debug("space lock status check")
-	return locked
-}
-
 func (s *space) Id() string {
 	return s.id
 }
@@ -306,7 +295,13 @@ func (s *space) PutTree(ctx context.Context, payload treestorage.TreeStorageCrea
 		SyncStatus:     s.syncStatus,
 		PeerGetter:     s.peerManager,
 	}
-	return synctree.PutSyncTree(ctx, payload, deps)
+	t, err = synctree.PutSyncTree(ctx, payload, deps)
+	if err != nil {
+		return
+	}
+	s.treesUsed.Add(1)
+	log.Debug("incrementing counter", zap.String("id", payload.RootRawChange.Id), zap.Int32("trees", s.treesUsed.Load()), zap.String("spaceId", s.id))
+	return
 }
 
 type BuildTreeOpts struct {
@@ -341,8 +336,8 @@ func (s *space) BuildTree(ctx context.Context, id string, opts BuildTreeOpts) (t
 	if t, err = synctree.BuildSyncTreeOrGetRemote(ctx, id, deps); err != nil {
 		return nil, err
 	}
-	log.Debug("incrementing counter", zap.String("id", id), zap.String("spaceId", s.id))
 	s.treesUsed.Add(1)
+	log.Debug("incrementing counter", zap.String("id", id), zap.Int32("trees", s.treesUsed.Load()), zap.String("spaceId", s.id))
 	return
 }
 
@@ -417,8 +412,8 @@ func (s *space) handleMessage(msg HandleMessage) {
 }
 
 func (s *space) onObjectClose(id string) {
-	log.Debug("decrementing counter", zap.String("id", id), zap.String("spaceId", s.id))
 	s.treesUsed.Add(-1)
+	log.Debug("decrementing counter", zap.String("id", id), zap.Int32("trees", s.treesUsed.Load()), zap.String("spaceId", s.id))
 	_ = s.handleQueue.CloseThread(id)
 }
 
@@ -462,3 +457,15 @@ func (s *space) Close() error {
 	log.With(zap.String("id", s.id)).Debug("space closed")
 	return mError.Err()
 }
+
+func (s *space) TryClose(objectTTL time.Duration) (close bool, err error) {
+	if time.Now().Sub(s.objectSync.LastUsage()) < objectTTL {
+		return false, nil
+	}
+	locked := s.treesUsed.Load() > 1
+	log.With(zap.Int32("trees used", s.treesUsed.Load()), zap.Bool("locked", locked), zap.String("spaceId", s.id)).Debug("space lock status check")
+	if locked {
+		return false, nil
+	}
+	return true, s.Close()
+}

commonspace/spaceservice.go

@@ -5,6 +5,7 @@ import (
 	"github.com/anytypeio/any-sync/accountservice"
 	"github.com/anytypeio/any-sync/app"
 	"github.com/anytypeio/any-sync/app/logger"
+	"github.com/anytypeio/any-sync/commonspace/credentialprovider"
 	"github.com/anytypeio/any-sync/commonspace/headsync"
 	"github.com/anytypeio/any-sync/commonspace/object/acl/aclrecordproto"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/treechangeproto"
@@ -16,6 +17,7 @@ import (
 	"github.com/anytypeio/any-sync/commonspace/syncstatus"
 	"github.com/anytypeio/any-sync/net/peer"
 	"github.com/anytypeio/any-sync/net/pool"
+	"github.com/anytypeio/any-sync/net/rpc/rpcerr"
 	"github.com/anytypeio/any-sync/nodeconf"
 	"sync/atomic"
 )
@@ -34,6 +36,7 @@ const AddSpaceCtxKey ctxKey = 0
 
 type SpaceService interface {
 	DeriveSpace(ctx context.Context, payload SpaceDerivePayload) (string, error)
+	DeriveId(ctx context.Context, payload SpaceDerivePayload) (string, error)
 	CreateSpace(ctx context.Context, payload SpaceCreatePayload) (string, error)
 	NewSpace(ctx context.Context, id string) (sp Space, err error)
 	app.Component
@@ -45,6 +48,7 @@ type spaceService struct {
 	configurationService nodeconf.Service
 	storageProvider      spacestorage.SpaceStorageProvider
 	peermanagerProvider  peermanager.PeerManagerProvider
+	credentialProvider   credentialprovider.CredentialProvider
 	treeGetter           treegetter.TreeGetter
 	pool                 pool.Pool
 }
@@ -56,6 +60,12 @@ func (s *spaceService) Init(a *app.App) (err error) {
 	s.configurationService = a.MustComponent(nodeconf.CName).(nodeconf.Service)
 	s.treeGetter = a.MustComponent(treegetter.CName).(treegetter.TreeGetter)
 	s.peermanagerProvider = a.MustComponent(peermanager.CName).(peermanager.PeerManagerProvider)
+	credProvider := a.Component(credentialprovider.CName)
+	if credProvider != nil {
+		s.credentialProvider = credProvider.(credentialprovider.CredentialProvider)
+	} else {
+		s.credentialProvider = credentialprovider.NewNoOp()
+	}
 	s.pool = a.MustComponent(pool.CName).(pool.Pool)
 	return nil
 }
@@ -80,6 +90,15 @@ func (s *spaceService) CreateSpace(ctx context.Context, payload SpaceCreatePaylo
 	return store.Id(), nil
 }
 
+func (s *spaceService) DeriveId(ctx context.Context, payload SpaceDerivePayload) (id string, err error) {
+	storageCreate, err := storagePayloadForSpaceDerive(payload)
+	if err != nil {
+		return
+	}
+	id = storageCreate.SpaceHeaderWithId.Id
+	return
+}
+
 func (s *spaceService) DeriveSpace(ctx context.Context, payload SpaceDerivePayload) (id string, err error) {
 	storageCreate, err := storagePayloadForSpaceDerive(payload)
 	if err != nil {
@@ -139,8 +158,8 @@ func (s *spaceService) NewSpace(ctx context.Context, id string) (Space, error) {
 		return nil, err
 	}
 
-	headSync := headsync.NewHeadSync(id, spaceIsDeleted, s.config.SyncPeriod, lastConfiguration, st, peerManager, getter, syncStatus, log)
+	headSync := headsync.NewHeadSync(id, spaceIsDeleted, s.config.SyncPeriod, lastConfiguration, st, peerManager, getter, syncStatus, s.credentialProvider, log)
-	objectSync := objectsync.NewObjectSync(id, spaceIsDeleted, lastConfiguration, peerManager, getter)
+	objectSync := objectsync.NewObjectSync(id, spaceIsDeleted, lastConfiguration, peerManager, getter, st)
 	sp := &space{
 		id:            id,
 		objectSync:    objectSync,
@@ -198,6 +217,7 @@ func (s *spaceService) getSpaceStorageFromRemote(ctx context.Context, id string)
 	cl := spacesyncproto.NewDRPCSpaceSyncClient(p)
 	res, err := cl.SpacePull(ctx, &spacesyncproto.SpacePullRequest{Id: id})
 	if err != nil {
+		err = rpcerr.Unwrap(err)
 		return
 	}
 

commonspace/spacestorage/spacestorage.go

@@ -2,14 +2,20 @@
 package spacestorage
 
 import (
+	"bytes"
 	"context"
 	"errors"
 	"github.com/anytypeio/any-sync/app"
 	"github.com/anytypeio/any-sync/commonspace/object/acl/aclrecordproto"
 	"github.com/anytypeio/any-sync/commonspace/object/acl/liststorage"
+	"github.com/anytypeio/any-sync/commonspace/object/tree/objecttree"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/treechangeproto"
 	"github.com/anytypeio/any-sync/commonspace/object/tree/treestorage"
 	"github.com/anytypeio/any-sync/commonspace/spacesyncproto"
+	"github.com/anytypeio/any-sync/util/cidutil"
+	"github.com/anytypeio/any-sync/util/keys/asymmetric/signingkey"
+	"github.com/gogo/protobuf/proto"
+	"strings"
 )
 
 const CName = "common.commonspace.spacestorage"
@@ -17,6 +23,7 @@ const CName = "common.commonspace.spacestorage"
 var (
 	ErrSpaceStorageExists   = errors.New("space storage exists")
 	ErrSpaceStorageMissing  = errors.New("space storage missing")
+	ErrIncorrectSpaceHeader = errors.New("incorrect space header")
 
 	ErrTreeStorageAlreadyDeleted = errors.New("tree storage already deleted")
 )
@@ -63,3 +70,38 @@ func ValidateSpaceStorageCreatePayload(payload SpaceStorageCreatePayload) (err e
 	// TODO: add proper validation
 	return nil
 }
+
+func ValidateSpaceHeader(spaceId string, header, identity []byte) (err error) {
+	split := strings.Split(spaceId, ".")
+	if len(split) != 2 {
+		return ErrIncorrectSpaceHeader
+	}
+	if !cidutil.VerifyCid(header, split[0]) {
+		err = objecttree.ErrIncorrectCid
+		return
+	}
+	raw := &spacesyncproto.RawSpaceHeader{}
+	err = proto.Unmarshal(header, raw)
+	if err != nil {
+		return
+	}
+	payload := &spacesyncproto.SpaceHeader{}
+	err = proto.Unmarshal(raw.SpaceHeader, payload)
+	if err != nil {
+		return
+	}
+	if identity != nil && !bytes.Equal(identity, payload.Identity) {
+		err = ErrIncorrectSpaceHeader
+		return
+	}
+	key, err := signingkey.NewSigningEd25519PubKeyFromBytes(payload.Identity)
+	if err != nil {
+		return
+	}
+	res, err := key.Verify(raw.SpaceHeader, raw.Signature)
+	if err != nil || !res {
+		err = ErrIncorrectSpaceHeader
+		return
+	}
+	return
+}

commonspace/spacesyncproto/protos/spacesync.proto

@@ -66,6 +66,7 @@ message ObjectSyncMessage {
 // SpacePushRequest is a request to add space on a node containing only one acl record
 message SpacePushRequest {
     SpacePayload payload = 1;
+    bytes Credential = 2;
 }
 
 // SpacePushResponse is an empty response
@@ -97,6 +98,7 @@ message SpaceHeader {
     string spaceType = 3;
     uint64 replicationKey = 4;
     bytes seed = 5;
+    bytes spaceHeaderPayload = 6;
 }
 
 // RawSpaceHeader is raw header for SpaceHeader

commonspace/spacesyncproto/spacesync.pb.go

@@ -438,6 +438,7 @@ func (m *ObjectSyncMessage) GetObjectId() string {
 // SpacePushRequest is a request to add space on a node containing only one acl record
 type SpacePushRequest struct {
 	Payload    *SpacePayload `protobuf:"bytes,1,opt,name=payload,proto3" json:"payload,omitempty"`
+	Credential []byte        `protobuf:"bytes,2,opt,name=Credential,proto3" json:"Credential,omitempty"`
 }
 
 func (m *SpacePushRequest) Reset()         { *m = SpacePushRequest{} }
@@ -480,6 +481,13 @@ func (m *SpacePushRequest) GetPayload() *SpacePayload {
 	return nil
 }
 
+func (m *SpacePushRequest) GetCredential() []byte {
+	if m != nil {
+		return m.Credential
+	}
+	return nil
+}
+
 // SpacePushResponse is an empty response
 type SpacePushResponse struct {
 }
@@ -691,6 +699,7 @@ type SpaceHeader struct {
 	SpaceType          string `protobuf:"bytes,3,opt,name=spaceType,proto3" json:"spaceType,omitempty"`
 	ReplicationKey     uint64 `protobuf:"varint,4,opt,name=replicationKey,proto3" json:"replicationKey,omitempty"`
 	Seed               []byte `protobuf:"bytes,5,opt,name=seed,proto3" json:"seed,omitempty"`
+	SpaceHeaderPayload []byte `protobuf:"bytes,6,opt,name=spaceHeaderPayload,proto3" json:"spaceHeaderPayload,omitempty"`
 }
 
 func (m *SpaceHeader) Reset()         { *m = SpaceHeader{} }
@@ -761,6 +770,13 @@ func (m *SpaceHeader) GetSeed() []byte {
 	return nil
 }
 
+func (m *SpaceHeader) GetSpaceHeaderPayload() []byte {
+	if m != nil {
+		return m.SpaceHeaderPayload
+	}
+	return nil
+}
+
 // RawSpaceHeader is raw header for SpaceHeader
 type RawSpaceHeader struct {
 	SpaceHeader []byte `protobuf:"bytes,1,opt,name=spaceHeader,proto3" json:"spaceHeader,omitempty"`
@@ -1232,71 +1248,73 @@ func init() {
 }
 
 var fileDescriptor_80e49f1f4ac27799 = []byte{
-	// 1019 bytes of a gzipped FileDescriptorProto
+	// 1042 bytes of a gzipped FileDescriptorProto
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+	0x78, 0xfd, 0x73, 0xe3, 0xb2, 0xf2, 0xcb, 0x4d, 0xb8, 0xf5, 0x33, 0x0f, 0xa6, 0x48, 0x3b, 0xd0,
-	0xef, 0xe0, 0xce, 0x5c, 0xc2, 0xc3, 0x90, 0xc7, 0x62, 0x1c, 0x49, 0x75, 0xed, 0x53, 0x4d, 0x6f,
+	0x28, 0x3b, 0x59, 0x7a, 0x74, 0x47, 0xe6, 0x9e, 0x18, 0xf1, 0xc7, 0xb0, 0xe3, 0xe9, 0xaf, 0xe4,
-	0xe0, 0xa5, 0x83, 0xae, 0xce, 0x4a, 0xc8, 0x32, 0xbd, 0x5d, 0x45, 0xff, 0xab, 0x05, 0x8d, 0x8c,
+	0x0c, 0x31, 0xc9, 0x27, 0xd6, 0x3c, 0x48, 0xdf, 0xc1, 0xdd, 0xb9, 0x84, 0x87, 0x21, 0x8f, 0xc5,
-	0xfa, 0x84, 0x4b, 0x4e, 0x9e, 0xc1, 0x96, 0x9b, 0xd6, 0xd4, 0x0c, 0xcf, 0x07, 0x8b, 0x55, 0x58,
+	0x38, 0x92, 0xea, 0x99, 0xa4, 0x9a, 0xde, 0xc0, 0x4b, 0x07, 0x67, 0x9d, 0x95, 0x90, 0x65, 0x7a,
-	0x28, 0x3d, 0xcb, 0xf4, 0xd5, 0xee, 0x11, 0x26, 0x3a, 0x53, 0xc1, 0xee, 0x2a, 0xdb, 0x2c, 0x0b,
+	0xbb, 0x8a, 0xfe, 0x57, 0x0b, 0x1a, 0x19, 0xf5, 0x31, 0x97, 0x9c, 0x3c, 0x83, 0x4d, 0x37, 0xad,
-	0x96, 0x5b, 0xd0, 0x1f, 0xcd, 0x88, 0x19, 0x4e, 0xcf, 0x85, 0x9b, 0xf8, 0xb1, 0xba, 0x9e, 0xea,
+	0xa9, 0x19, 0xc6, 0x0f, 0x17, 0xab, 0xb0, 0x50, 0x7a, 0x96, 0xe9, 0xab, 0x5d, 0x26, 0x4c, 0x74,
-	0x6d, 0x98, 0x81, 0x9b, 0xa5, 0x98, 0x9f, 0xc9, 0x73, 0xd8, 0xe4, 0xae, 0xd2, 0xd2, 0xce, 0x9a,
+	0xa6, 0x82, 0xdd, 0x55, 0xb6, 0x59, 0x16, 0x2c, 0xb7, 0xa0, 0x3f, 0x9a, 0x91, 0x34, 0x9c, 0x9e,
-	0x3d, 0xba, 0xe4, 0xac, 0xc4, 0xf4, 0x42, 0x6b, 0x32, 0x63, 0xf1, 0xf0, 0x12, 0xb6, 0xfb, 0x49,
+	0x0b, 0x37, 0xf1, 0x63, 0x75, 0x9d, 0xd5, 0x5b, 0x32, 0x03, 0x3c, 0x4b, 0x31, 0x3f, 0x93, 0xe7,
-	0x72, 0x1c, 0x79, 0x28, 0x48, 0x13, 0xe0, 0x6d, 0x88, 0x57, 0x31, 0xba, 0x12, 0x3d, 0xa7, 0x46,
+	0xb0, 0xc1, 0x5d, 0xa5, 0xa5, 0x9d, 0x35, 0x7b, 0x74, 0xc9, 0x59, 0x89, 0xe9, 0x85, 0xd6, 0x64,
-	0x1c, 0x33, 0xa2, 0xde, 0xf8, 0x42, 0xf8, 0xe1, 0xc8, 0xb1, 0xc8, 0x9e, 0x69, 0x5c, 0xff, 0xca,
+	0xc6, 0xe2, 0xd1, 0x25, 0x6c, 0x9d, 0x24, 0x49, 0x3f, 0xf2, 0x50, 0x90, 0x26, 0xc0, 0xdb, 0x10,
-	0x17, 0x52, 0x38, 0x36, 0xb9, 0x0d, 0x7b, 0x1a, 0xf8, 0x26, 0x92, 0x83, 0xf0, 0x98, 0xbb, 0x63,
+	0xaf, 0x62, 0x74, 0x25, 0x7a, 0x4e, 0x8d, 0x38, 0x66, 0xa4, 0xbd, 0xf1, 0x85, 0xf0, 0xc3, 0x91,
-	0x74, 0xd6, 0x08, 0x81, 0xa6, 0x06, 0x07, 0x22, 0x6d, 0xb0, 0xe7, 0xac, 0x2b, 0xcb, 0x7e, 0x92,
+	0x63, 0x91, 0x5d, 0xd3, 0xb8, 0x93, 0x2b, 0x5f, 0x48, 0xe1, 0xd8, 0xe4, 0x0e, 0xec, 0x6a, 0xe0,
-	0x44, 0xc9, 0xe9, 0xc5, 0x85, 0x40, 0xe9, 0x78, 0x0f, 0x9f, 0xc1, 0xbd, 0x15, 0xb1, 0x91, 0x5d,
+	0x9b, 0x48, 0x0e, 0xc2, 0x3e, 0x77, 0xc7, 0xe8, 0xac, 0x11, 0x02, 0x4d, 0x0d, 0x0e, 0x44, 0xda,
-	0xa8, 0x1b, 0xf4, 0x1c, 0x9d, 0x9a, 0x32, 0x7d, 0x1b, 0x8a, 0x1c, 0xb0, 0x7a, 0x7f, 0xd9, 0x50,
+	0x60, 0xcf, 0x59, 0x57, 0x96, 0x27, 0x49, 0x12, 0x25, 0xa7, 0x17, 0x17, 0x02, 0xa5, 0xe3, 0x3d,
-	0x4f, 0x6d, 0x67, 0xa1, 0x4b, 0x8e, 0x61, 0x3b, 0x5b, 0x65, 0xa4, 0x5d, 0xb9, 0xdf, 0xf4, 0x24,
+	0x7a, 0x06, 0xf7, 0x57, 0xc4, 0x46, 0x76, 0xa0, 0x6e, 0xd0, 0x73, 0x74, 0x6a, 0xca, 0xf4, 0x6d,
-	0x6f, 0xdf, 0xaf, 0xde, 0x7d, 0xe9, 0x04, 0x7f, 0x65, 0x18, 0xd5, 0x3e, 0x20, 0xf7, 0x97, 0xa6,
+	0x28, 0x72, 0xc0, 0xea, 0xfd, 0x69, 0x43, 0x3d, 0xb5, 0x9d, 0x85, 0x2e, 0xe9, 0xc3, 0x56, 0xb6,
-	0x77, 0xb1, 0x6c, 0xda, 0x07, 0xd5, 0xc2, 0x25, 0x9e, 0x20, 0xa8, 0xe2, 0xc9, 0x17, 0x4b, 0x15,
+	0x1a, 0x49, 0xbb, 0x72, 0x5f, 0xea, 0xc9, 0xdf, 0x7e, 0x50, 0xbd, 0x4b, 0xd3, 0x89, 0xff, 0xca,
-	0x4f, 0x69, 0xa3, 0x30, 0x70, 0x8a, 0x1d, 0x3c, 0x94, 0x09, 0xf2, 0x09, 0x39, 0x58, 0x7a, 0xc3,
+	0x30, 0xaa, 0xfd, 0x41, 0x1e, 0x2c, 0x4d, 0xfb, 0x62, 0x79, 0xb5, 0xf7, 0xab, 0x85, 0x4b, 0x3c,
-	0xa5, 0x05, 0xdd, 0xfe, 0xa0, 0xf4, 0xd0, 0x7a, 0x62, 0xbd, 0xfc, 0xf4, 0xef, 0xeb, 0x8e, 0xf5,
+	0x41, 0x50, 0xc5, 0x93, 0x2f, 0xa2, 0x2a, 0x9e, 0xd2, 0x06, 0x62, 0xe0, 0x14, 0x3b, 0x7d, 0x28,
-	0xfe, 0xba, 0x63, 0xfd, 0x7b, 0xdd, 0xb1, 0x7e, 0xbb, 0xe9, 0xd4, 0xde, 0xdf, 0x74, 0x6a, 0xff,
+	0x13, 0xe4, 0x13, 0xb2, 0xbf, 0xf4, 0x86, 0x4b, 0x0b, 0xbf, 0xfd, 0x41, 0xe9, 0x81, 0xf5, 0xc4,
-	0xdc, 0x74, 0x6a, 0xdf, 0xb7, 0x57, 0xff, 0x6b, 0x77, 0xbe, 0xa9, 0xff, 0x1c, 0xfd, 0x17, 0x00,
+	0x7a, 0xf9, 0xe9, 0x5f, 0xd7, 0x1d, 0xeb, 0xfd, 0x75, 0xc7, 0xfa, 0xf7, 0xba, 0x63, 0xfd, 0x76,
-	0x00, 0xff, 0xff, 0xa1, 0xe4, 0x04, 0x3d, 0xff, 0x09, 0x00, 0x00,
+	0xd3, 0xa9, 0xbd, 0xbf, 0xe9, 0xd4, 0xfe, 0xb9, 0xe9, 0xd4, 0xbe, 0x6f, 0xaf, 0xfe, 0x57, 0xf1,
+	0x7c, 0x43, 0xff, 0x39, 0xfa, 0x2f, 0x00, 0x00, 0xff, 0xff, 0x13, 0xff, 0xe7, 0x17, 0x4f, 0x0a,
+	0x00, 0x00,
 }
 
 func (m *HeadSyncRange) Marshal() (dAtA []byte, err error) {
@@ -1582,6 +1600,13 @@ func (m *SpacePushRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.Credential) > 0 {
+		i -= len(m.Credential)
+		copy(dAtA[i:], m.Credential)
+		i = encodeVarintSpacesync(dAtA, i, uint64(len(m.Credential)))
+		i--
+		dAtA[i] = 0x12
+	}
 	if m.Payload != nil {
 		{
 			size, err := m.Payload.MarshalToSizedBuffer(dAtA[:i])
@@ -1768,6 +1793,13 @@ func (m *SpaceHeader) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.SpaceHeaderPayload) > 0 {
+		i -= len(m.SpaceHeaderPayload)
+		copy(dAtA[i:], m.SpaceHeaderPayload)
+		i = encodeVarintSpacesync(dAtA, i, uint64(len(m.SpaceHeaderPayload)))
+		i--
+		dAtA[i] = 0x32
+	}
 	if len(m.Seed) > 0 {
 		i -= len(m.Seed)
 		copy(dAtA[i:], m.Seed)
@@ -2276,6 +2308,10 @@ func (m *SpacePushRequest) Size() (n int) {
 		l = m.Payload.Size()
 		n += 1 + l + sovSpacesync(uint64(l))
 	}
+	l = len(m.Credential)
+	if l > 0 {
+		n += 1 + l + sovSpacesync(uint64(l))
+	}
 	return n
 }
 
@@ -2367,6 +2403,10 @@ func (m *SpaceHeader) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovSpacesync(uint64(l))
 	}
+	l = len(m.SpaceHeaderPayload)
+	if l > 0 {
+		n += 1 + l + sovSpacesync(uint64(l))
+	}
 	return n
 }
 
@@ -3363,6 +3403,40 @@ func (m *SpacePushRequest) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Credential", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSpacesync
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Credential = append(m.Credential[:0], dAtA[iNdEx:postIndex]...)
+			if m.Credential == nil {
+				m.Credential = []byte{}
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipSpacesync(dAtA[iNdEx:])
@@ -3987,6 +4061,40 @@ func (m *SpaceHeader) Unmarshal(dAtA []byte) error {
 				m.Seed = []byte{}
 			}
 			iNdEx = postIndex
+		case 6:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SpaceHeaderPayload", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowSpacesync
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthSpacesync
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.SpaceHeaderPayload = append(m.SpaceHeaderPayload[:0], dAtA[iNdEx:postIndex]...)
+			if m.SpaceHeaderPayload == nil {
+				m.SpaceHeaderPayload = []byte{}
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipSpacesync(dAtA[iNdEx:])

commonspace/syncstatus/syncstatus.go

@@ -3,15 +3,16 @@ package syncstatus
 import (
 	"context"
 	"fmt"
+	"sync"
+	"time"
+
 	"github.com/anytypeio/any-sync/app/logger"
-	treestorage "github.com/anytypeio/any-sync/commonspace/object/tree/treestorage"
+	"github.com/anytypeio/any-sync/commonspace/object/tree/treestorage"
 	"github.com/anytypeio/any-sync/commonspace/spacestorage"
 	"github.com/anytypeio/any-sync/nodeconf"
 	"github.com/anytypeio/any-sync/util/periodicsync"
 	"github.com/anytypeio/any-sync/util/slice"
 	"golang.org/x/exp/slices"
-	"sync"
-	"time"
 )
 
 const (
@@ -19,7 +20,7 @@ const (
 	syncTimeout        = time.Second
 )
 
-var log = logger.NewNamed("commonspace.syncstatus")
+var log = logger.NewNamed("common.commonspace.syncstatus")
 
 type UpdateReceiver interface {
 	UpdateTree(ctx context.Context, treeId string, status SyncStatus) (err error)

coordinator/coordinatorclient/coordinatorclient.go

@@ -4,8 +4,10 @@ package coordinatorclient
 import (
 	"context"
 	"github.com/anytypeio/any-sync/app"
+	"github.com/anytypeio/any-sync/commonspace/object/tree/treechangeproto"
 	"github.com/anytypeio/any-sync/coordinator/coordinatorproto"
 	"github.com/anytypeio/any-sync/net/pool"
+	"github.com/anytypeio/any-sync/net/rpc/rpcerr"
 	"github.com/anytypeio/any-sync/nodeconf"
 )
 
@@ -16,7 +18,9 @@ func New() CoordinatorClient {
 }
 
 type CoordinatorClient interface {
-	SpaceSign(ctx context.Context, spaceId string) (receipt *coordinatorproto.SpaceReceiptWithSignature, err error)
+	ChangeStatus(ctx context.Context, spaceId string, deleteRaw *treechangeproto.RawTreeChangeWithId) (status *coordinatorproto.SpaceStatusPayload, err error)
+	StatusCheck(ctx context.Context, spaceId string) (status *coordinatorproto.SpaceStatusPayload, err error)
+	SpaceSign(ctx context.Context, spaceId string, spaceHeader []byte) (receipt *coordinatorproto.SpaceReceiptWithSignature, err error)
 	FileLimitCheck(ctx context.Context, spaceId string, identity []byte) (limit uint64, err error)
 	app.Component
 }
@@ -26,6 +30,40 @@ type coordinatorClient struct {
 	nodeConf nodeconf.Service
 }
 
+func (c *coordinatorClient) ChangeStatus(ctx context.Context, spaceId string, deleteRaw *treechangeproto.RawTreeChangeWithId) (status *coordinatorproto.SpaceStatusPayload, err error) {
+	cl, err := c.client(ctx)
+	if err != nil {
+		return
+	}
+	resp, err := cl.SpaceStatusChange(ctx, &coordinatorproto.SpaceStatusChangeRequest{
+		SpaceId:               spaceId,
+		DeletionChangeId:      deleteRaw.GetId(),
+		DeletionChangePayload: deleteRaw.GetRawChange(),
+	})
+	if err != nil {
+		err = rpcerr.Unwrap(err)
+		return
+	}
+	status = resp.Payload
+	return
+}
+
+func (c *coordinatorClient) StatusCheck(ctx context.Context, spaceId string) (status *coordinatorproto.SpaceStatusPayload, err error) {
+	cl, err := c.client(ctx)
+	if err != nil {
+		return
+	}
+	resp, err := cl.SpaceStatusCheck(ctx, &coordinatorproto.SpaceStatusCheckRequest{
+		SpaceId: spaceId,
+	})
+	if err != nil {
+		err = rpcerr.Unwrap(err)
+		return
+	}
+	status = resp.Payload
+	return
+}
+
 func (c *coordinatorClient) Init(a *app.App) (err error) {
 	c.pool = a.MustComponent(pool.CName).(pool.Service).NewPool(CName)
 	c.nodeConf = a.MustComponent(nodeconf.CName).(nodeconf.Service)
@@ -36,15 +74,17 @@ func (c *coordinatorClient) Name() (name string) {
 	return CName
 }
 
-func (c *coordinatorClient) SpaceSign(ctx context.Context, spaceId string) (receipt *coordinatorproto.SpaceReceiptWithSignature, err error) {
+func (c *coordinatorClient) SpaceSign(ctx context.Context, spaceId string, spaceHeader []byte) (receipt *coordinatorproto.SpaceReceiptWithSignature, err error) {
 	cl, err := c.client(ctx)
 	if err != nil {
 		return
 	}
 	resp, err := cl.SpaceSign(ctx, &coordinatorproto.SpaceSignRequest{
 		SpaceId: spaceId,
+		Header:  spaceHeader,
 	})
 	if err != nil {
+		err = rpcerr.Unwrap(err)
 		return
 	}
 	return resp.Receipt, nil
@@ -60,6 +100,7 @@ func (c *coordinatorClient) FileLimitCheck(ctx context.Context, spaceId string,
 		SpaceId:         spaceId,
 	})
 	if err != nil {
+		err = rpcerr.Unwrap(err)
 		return
 	}
 	return resp.Limit, nil

coordinator/coordinatorclient/mock_coordinatorclient/mock_coordinatorclient.go

@@ -9,6 +9,7 @@ import (
 	reflect "reflect"
 
 	app "github.com/anytypeio/any-sync/app"
+	treechangeproto "github.com/anytypeio/any-sync/commonspace/object/tree/treechangeproto"
 	coordinatorproto "github.com/anytypeio/any-sync/coordinator/coordinatorproto"
 	gomock "github.com/golang/mock/gomock"
 )
@@ -36,6 +37,21 @@ func (m *MockCoordinatorClient) EXPECT() *MockCoordinatorClientMockRecorder {
 	return m.recorder
 }
 
+// ChangeStatus mocks base method.
+func (m *MockCoordinatorClient) ChangeStatus(arg0 context.Context, arg1 string, arg2 *treechangeproto.RawTreeChangeWithId) (*coordinatorproto.SpaceStatusPayload, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "ChangeStatus", arg0, arg1, arg2)
+	ret0, _ := ret[0].(*coordinatorproto.SpaceStatusPayload)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// ChangeStatus indicates an expected call of ChangeStatus.
+func (mr *MockCoordinatorClientMockRecorder) ChangeStatus(arg0, arg1, arg2 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ChangeStatus", reflect.TypeOf((*MockCoordinatorClient)(nil).ChangeStatus), arg0, arg1, arg2)
+}
+
 // FileLimitCheck mocks base method.
 func (m *MockCoordinatorClient) FileLimitCheck(arg0 context.Context, arg1 string, arg2 []byte) (uint64, error) {
 	m.ctrl.T.Helper()
@@ -80,16 +96,31 @@ func (mr *MockCoordinatorClientMockRecorder) Name() *gomock.Call {
 }
 
 // SpaceSign mocks base method.
-func (m *MockCoordinatorClient) SpaceSign(arg0 context.Context, arg1 string) (*coordinatorproto.SpaceReceiptWithSignature, error) {
+func (m *MockCoordinatorClient) SpaceSign(arg0 context.Context, arg1 string, arg2 []byte) (*coordinatorproto.SpaceReceiptWithSignature, error) {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "SpaceSign", arg0, arg1)
+	ret := m.ctrl.Call(m, "SpaceSign", arg0, arg1, arg2)
 	ret0, _ := ret[0].(*coordinatorproto.SpaceReceiptWithSignature)
 	ret1, _ := ret[1].(error)
 	return ret0, ret1
 }
 
 // SpaceSign indicates an expected call of SpaceSign.
-func (mr *MockCoordinatorClientMockRecorder) SpaceSign(arg0, arg1 interface{}) *gomock.Call {
+func (mr *MockCoordinatorClientMockRecorder) SpaceSign(arg0, arg1, arg2 interface{}) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SpaceSign", reflect.TypeOf((*MockCoordinatorClient)(nil).SpaceSign), arg0, arg1)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SpaceSign", reflect.TypeOf((*MockCoordinatorClient)(nil).SpaceSign), arg0, arg1, arg2)
+}
+
+// StatusCheck mocks base method.
+func (m *MockCoordinatorClient) StatusCheck(arg0 context.Context, arg1 string) (*coordinatorproto.SpaceStatusPayload, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "StatusCheck", arg0, arg1)
+	ret0, _ := ret[0].(*coordinatorproto.SpaceStatusPayload)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// StatusCheck indicates an expected call of StatusCheck.
+func (mr *MockCoordinatorClientMockRecorder) StatusCheck(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "StatusCheck", reflect.TypeOf((*MockCoordinatorClient)(nil).StatusCheck), arg0, arg1)
 }

coordinator/coordinatorproto/coordinator_drpc.pb.go

@@ -42,6 +42,8 @@ type DRPCCoordinatorClient interface {
 
 	SpaceSign(ctx context.Context, in *SpaceSignRequest) (*SpaceSignResponse, error)
 	FileLimitCheck(ctx context.Context, in *FileLimitCheckRequest) (*FileLimitCheckResponse, error)
+	SpaceStatusCheck(ctx context.Context, in *SpaceStatusCheckRequest) (*SpaceStatusCheckResponse, error)
+	SpaceStatusChange(ctx context.Context, in *SpaceStatusChangeRequest) (*SpaceStatusChangeResponse, error)
 }
 
 type drpcCoordinatorClient struct {
@@ -72,9 +74,29 @@ func (c *drpcCoordinatorClient) FileLimitCheck(ctx context.Context, in *FileLimi
 	return out, nil
 }
 
+func (c *drpcCoordinatorClient) SpaceStatusCheck(ctx context.Context, in *SpaceStatusCheckRequest) (*SpaceStatusCheckResponse, error) {
+	out := new(SpaceStatusCheckResponse)
+	err := c.cc.Invoke(ctx, "/coordinator.Coordinator/SpaceStatusCheck", drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{}, in, out)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *drpcCoordinatorClient) SpaceStatusChange(ctx context.Context, in *SpaceStatusChangeRequest) (*SpaceStatusChangeResponse, error) {
+	out := new(SpaceStatusChangeResponse)
+	err := c.cc.Invoke(ctx, "/coordinator.Coordinator/SpaceStatusChange", drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{}, in, out)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 type DRPCCoordinatorServer interface {
 	SpaceSign(context.Context, *SpaceSignRequest) (*SpaceSignResponse, error)
 	FileLimitCheck(context.Context, *FileLimitCheckRequest) (*FileLimitCheckResponse, error)
+	SpaceStatusCheck(context.Context, *SpaceStatusCheckRequest) (*SpaceStatusCheckResponse, error)
+	SpaceStatusChange(context.Context, *SpaceStatusChangeRequest) (*SpaceStatusChangeResponse, error)
 }
 
 type DRPCCoordinatorUnimplementedServer struct{}
@@ -87,9 +109,17 @@ func (s *DRPCCoordinatorUnimplementedServer) FileLimitCheck(context.Context, *Fi
 	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
 }
 
+func (s *DRPCCoordinatorUnimplementedServer) SpaceStatusCheck(context.Context, *SpaceStatusCheckRequest) (*SpaceStatusCheckResponse, error) {
+	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
+}
+
+func (s *DRPCCoordinatorUnimplementedServer) SpaceStatusChange(context.Context, *SpaceStatusChangeRequest) (*SpaceStatusChangeResponse, error) {
+	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
+}
+
 type DRPCCoordinatorDescription struct{}
 
-func (DRPCCoordinatorDescription) NumMethods() int { return 2 }
+func (DRPCCoordinatorDescription) NumMethods() int { return 4 }
 
 func (DRPCCoordinatorDescription) Method(n int) (string, drpc.Encoding, drpc.Receiver, interface{}, bool) {
 	switch n {
@@ -111,6 +141,24 @@ func (DRPCCoordinatorDescription) Method(n int) (string, drpc.Encoding, drpc.Rec
 						in1.(*FileLimitCheckRequest),
 					)
 			}, DRPCCoordinatorServer.FileLimitCheck, true
+	case 2:
+		return "/coordinator.Coordinator/SpaceStatusCheck", drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{},
+			func(srv interface{}, ctx context.Context, in1, in2 interface{}) (drpc.Message, error) {
+				return srv.(DRPCCoordinatorServer).
+					SpaceStatusCheck(
+						ctx,
+						in1.(*SpaceStatusCheckRequest),
+					)
+			}, DRPCCoordinatorServer.SpaceStatusCheck, true
+	case 3:
+		return "/coordinator.Coordinator/SpaceStatusChange", drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{},
+			func(srv interface{}, ctx context.Context, in1, in2 interface{}) (drpc.Message, error) {
+				return srv.(DRPCCoordinatorServer).
+					SpaceStatusChange(
+						ctx,
+						in1.(*SpaceStatusChangeRequest),
+					)
+			}, DRPCCoordinatorServer.SpaceStatusChange, true
 	default:
 		return "", nil, nil, nil, false
 	}
@@ -151,3 +199,35 @@ func (x *drpcCoordinator_FileLimitCheckStream) SendAndClose(m *FileLimitCheckRes
 	}
 	return x.CloseSend()
 }
+
+type DRPCCoordinator_SpaceStatusCheckStream interface {
+	drpc.Stream
+	SendAndClose(*SpaceStatusCheckResponse) error
+}
+
+type drpcCoordinator_SpaceStatusCheckStream struct {
+	drpc.Stream
+}
+
+func (x *drpcCoordinator_SpaceStatusCheckStream) SendAndClose(m *SpaceStatusCheckResponse) error {
+	if err := x.MsgSend(m, drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{}); err != nil {
+		return err
+	}
+	return x.CloseSend()
+}
+
+type DRPCCoordinator_SpaceStatusChangeStream interface {
+	drpc.Stream
+	SendAndClose(*SpaceStatusChangeResponse) error
+}
+
+type drpcCoordinator_SpaceStatusChangeStream struct {
+	drpc.Stream
+}
+
+func (x *drpcCoordinator_SpaceStatusChangeStream) SendAndClose(m *SpaceStatusChangeResponse) error {
+	if err := x.MsgSend(m, drpcEncoding_File_coordinator_coordinatorproto_protos_coordinator_proto{}); err != nil {
+		return err
+	}
+	return x.CloseSend()
+}

coordinator/coordinatorproto/errors.go

@@ -0,0 +1,16 @@
+package coordinatorproto
+
+import (
+	"errors"
+	"github.com/anytypeio/any-sync/net/rpc/rpcerr"
+)
+
+var (
+	errGroup = rpcerr.ErrGroup(ErrorCodes_ErrorOffset)
+
+	ErrUnexpected           = errGroup.Register(errors.New("unexpected error"), uint64(ErrorCodes_Unexpected))
+	ErrSpaceIsCreated       = errGroup.Register(errors.New("space is missing"), uint64(ErrorCodes_SpaceCreated))
+	ErrSpaceIsDeleted       = errGroup.Register(errors.New("space is deleted"), uint64(ErrorCodes_SpaceDeleted))
+	ErrSpaceDeletionPending = errGroup.Register(errors.New("space is set out for deletion"), uint64(ErrorCodes_SpaceDeletionPending))
+	ErrSpaceNotExists       = errGroup.Register(errors.New("space not exists"), uint64(ErrorCodes_SpaceNotExists))
+)

coordinator/coordinatorproto/protos/coordinator.proto

@@ -12,10 +12,38 @@ service Coordinator {
     //  - if a handshake identity matches a given identity
     //  - if a requester contains in nodeconf list
     rpc FileLimitCheck(FileLimitCheckRequest) returns (FileLimitCheckResponse);
+
+    // SpaceStatusCheck checks the status of space and tells if it is deleted or not
+    rpc SpaceStatusCheck(SpaceStatusCheckRequest) returns (SpaceStatusCheckResponse);
+
+    // SpaceStatusChange changes the status of space
+    rpc SpaceStatusChange(SpaceStatusChangeRequest) returns (SpaceStatusChangeResponse);
 }
 
 message SpaceSignRequest {
     string spaceId = 1;
+    bytes header = 2;
+}
+
+enum ErrorCodes {
+    Unexpected = 0;
+    SpaceDeleted = 1;
+    SpaceDeletionPending = 2;
+    SpaceCreated = 3;
+    SpaceNotExists = 4;
+    ErrorOffset = 300;
+}
+
+enum SpaceStatus {
+    SpaceStatusCreated = 0;
+    SpaceStatusPendingDeletion = 1;
+    SpaceStatusDeletionStarted = 2;
+    SpaceStatusDeleted = 3;
+}
+
+message SpaceStatusPayload {
+    SpaceStatus status = 1;
+    int64 deletionTimestamp = 2;
 }
 
 message SpaceSignResponse {
@@ -53,3 +81,25 @@ message FileLimitCheckRequest {
 message FileLimitCheckResponse {
     uint64 limit = 1;
 }
+
+// SpaceStatusCheckRequest contains the spaceId of requested space
+message SpaceStatusCheckRequest {
+    string spaceId = 1;
+}
+
+// SpaceStatusCheckResponse contains the current status of space
+message SpaceStatusCheckResponse {
+    SpaceStatusPayload payload = 1;
+}
+
+// SpaceStatusChangeRequest contains the deletionChange if we want to delete space, or it is empty otherwise
+message SpaceStatusChangeRequest {
+    string spaceId = 1;
+    string deletionChangeId = 2;
+    bytes deletionChangePayload = 3;
+}
+
+// SpaceStatusChangeResponse contains changed status of space
+message SpaceStatusChangeResponse {
+    SpaceStatusPayload payload = 1;
+}

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/awalterschulze/gographviz v2.0.3+incompatible
 	github.com/cespare/xxhash v1.1.0
 	github.com/cheggaaa/mb/v3 v3.0.1
+	github.com/gobwas/glob v0.2.3
 	github.com/goccy/go-graphviz v0.1.0
 	github.com/gogo/protobuf v1.3.2
 	github.com/golang/mock v1.6.0
@@ -19,9 +20,10 @@ require (
 	github.com/ipfs/go-ipfs-exchange-interface v0.2.0
 	github.com/ipfs/go-ipld-format v0.4.0
 	github.com/ipfs/go-merkledag v0.10.0
-	github.com/ipfs/go-unixfs v0.4.3
+	github.com/ipfs/go-unixfs v0.4.4
 	github.com/libp2p/go-libp2p v0.24.1
 	github.com/minio/sha256-simd v1.0.0
+	github.com/mr-tron/base58 v1.2.0
 	github.com/multiformats/go-multibase v0.1.1
 	github.com/multiformats/go-multihash v0.2.1
 	github.com/prometheus/client_golang v1.14.0
@@ -30,7 +32,7 @@ require (
 	github.com/zeebo/errs v1.3.0
 	go.uber.org/zap v1.24.0
 	golang.org/x/exp v0.0.0-20230105202349-8879d0199aa3
-	golang.org/x/net v0.7.0
+	golang.org/x/net v0.8.0
 	gopkg.in/mgo.v2 v2.0.0-20190816093944-a6b53ec6cb22
 	gopkg.in/yaml.v3 v3.0.1
 	storj.io/drpc v0.0.32
@@ -74,7 +76,6 @@ require (
 	github.com/mattn/go-isatty v0.0.17 // indirect
 	github.com/mattn/go-pointer v0.0.1 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
-	github.com/mr-tron/base58 v1.2.0 // indirect
 	github.com/multiformats/go-base32 v0.1.0 // indirect
 	github.com/multiformats/go-base36 v0.2.0 // indirect
 	github.com/multiformats/go-multiaddr v0.8.0 // indirect
@@ -99,7 +100,7 @@ require (
 	golang.org/x/crypto v0.4.0 // indirect
 	golang.org/x/image v0.0.0-20200119044424-58c23975cae1 // indirect
 	golang.org/x/sync v0.1.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
 	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
 	google.golang.org/protobuf v1.28.1 // indirect
 	lukechampine.com/blake3 v1.1.7 // indirect

go.sum

@@ -106,6 +106,8 @@ github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-yaml/yaml v2.1.0+incompatible/go.mod h1:w2MrLa16VYP0jy6N7M5kHaCkaLENm+P+Tv+MfurjSw0=
+github.com/gobwas/glob v0.2.3 h1:A4xDbljILXROh+kObIiy5kIaPYD8e96x1tgBhUI5J+Y=
+github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJAkT8=
 github.com/goccy/go-graphviz v0.1.0 h1:6OqQoQ5PeAiHYe/YcusyeulqBrOkUb16HQ4ctRdyVUU=
 github.com/goccy/go-graphviz v0.1.0/go.mod h1:wXVsXxmyMQU6TN3zGRttjNn3h+iCAS7xQFC6TlNvLhk=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
@@ -253,8 +255,8 @@ github.com/ipfs/go-merkledag v0.10.0/go.mod h1:zkVav8KiYlmbzUzNM6kENzkdP5+qR7+2m
 github.com/ipfs/go-metrics-interface v0.0.1 h1:j+cpbjYvu4R8zbleSs36gvB7jR+wsL2fGD6n0jO4kdg=
 github.com/ipfs/go-metrics-interface v0.0.1/go.mod h1:6s6euYU4zowdslK0GKHmqaIZ3j/b/tL7HTWtJ4VPgWY=
 github.com/ipfs/go-peertaskqueue v0.8.0 h1:JyNO144tfu9bx6Hpo119zvbEL9iQ760FHOiJYsUjqaU=
-github.com/ipfs/go-unixfs v0.4.3 h1:EdDc1sNZNFDUlo4UrVAvvAofVI5EwTnKu8Nv8mgXkWQ=
+github.com/ipfs/go-unixfs v0.4.4 h1:D/dLBOJgny5ZLIur2vIXVQVW0EyDHdOMBDEhgHrt6rY=
-github.com/ipfs/go-unixfs v0.4.3/go.mod h1:TSG7G1UuT+l4pNj91raXAPkX0BhJi3jST1FDTfQ5QyM=
+github.com/ipfs/go-unixfs v0.4.4/go.mod h1:TSG7G1UuT+l4pNj91raXAPkX0BhJi3jST1FDTfQ5QyM=
 github.com/ipfs/go-verifcid v0.0.2 h1:XPnUv0XmdH+ZIhLGKg6U2vaPaRDXb9urMyNVCE7uvTs=
 github.com/ipfs/go-verifcid v0.0.2/go.mod h1:40cD9x1y4OWnFXbLNJYRe7MpNvWlMn3LZAG5Wb4xnPU=
 github.com/ipld/go-codec-dagpb v1.6.0 h1:9nYazfyu9B1p3NAgfVdpRco3Fs2nFC72DqVsMj6rOcc=
@@ -576,8 +578,8 @@ golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96b
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20220127200216-cd36cc0744dd/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
 golang.org/x/net v0.0.0-20220225172249-27dd8689420f/go.mod h1:CfG3xpIq0wQ8r1q4Su4UZFWDARRcnwPjda9FqA0JpMk=
-golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=
+golang.org/x/net v0.8.0 h1:Zrh2ngAOFYneWTAIAPethzeaQLuHwhuBkuV6ZiRnUaQ=
-golang.org/x/net v0.7.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.8.0/go.mod h1:QVkue5JL9kW//ek3r6jTKnTFis1tRmNAW2P1shuFdJc=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -647,8 +649,8 @@ golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220704084225-05e143d24a9e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.5.0 h1:MUK/U/4lj1t1oPg0HfuXDN/Z1wv31ZJ/YcPiGccS4DU=
+golang.org/x/sys v0.6.0 h1:MVltZSvRTcU2ljQOhs94SXPftV6DCNnZViHeQps87pQ=
-golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=

net/peer/peer.go

@@ -2,15 +2,16 @@ package peer
 
 import (
 	"context"
+	"sync/atomic"
+	"time"
+
 	"github.com/anytypeio/any-sync/app/logger"
 	"github.com/libp2p/go-libp2p/core/sec"
 	"go.uber.org/zap"
 	"storj.io/drpc"
-	"sync/atomic"
-	"time"
 )
 
-var log = logger.NewNamed("peer")
+var log = logger.NewNamed("common.net.peer")
 
 func NewPeer(sc sec.SecureConn, conn drpc.Conn) Peer {
 	return &peer{
@@ -25,11 +26,13 @@ type Peer interface {
 	Id() string
 	LastUsage() time.Time
 	UpdateLastUsage()
+	TryClose(objectTTL time.Duration) (res bool, err error)
 	drpc.Conn
 }
 
 type peer struct {
 	id        string
+	ttl       time.Duration
 	lastUsage int64
 	sc        sec.SecureConn
 	drpc.Conn
@@ -76,6 +79,13 @@ func (p *peer) UpdateLastUsage() {
 	atomic.StoreInt64(&p.lastUsage, time.Now().Unix())
 }
 
+func (p *peer) TryClose(objectTTL time.Duration) (res bool, err error) {
+	if time.Now().Sub(p.LastUsage()) < objectTTL {
+		return false, nil
+	}
+	return true, p.Close()
+}
+
 func (p *peer) Close() (err error) {
 	log.Debug("peer close", zap.String("peerId", p.id))
 	return p.Conn.Close()

net/pool/pool.go

@@ -49,7 +49,7 @@ func (p *pool) Get(ctx context.Context, id string) (peer.Peer, error) {
 	default:
 		return pr, nil
 	}
-	_, _ = p.cache.Remove(id)
+	_, _ = p.cache.Remove(ctx, id)
 	return p.Get(ctx, id)
 }
 
@@ -67,6 +67,7 @@ func (p *pool) GetOneOf(ctx context.Context, peerIds []string) (peer.Peer, error
 			default:
 				return pr, nil
 			}
+			_, _ = p.cache.Remove(ctx, peerId)
 		}
 	}
 	// shuffle ids for better consistency

net/pool/pool_test.go

@@ -194,6 +194,10 @@ func (t *testPeer) LastUsage() time.Time {
 
 func (t *testPeer) UpdateLastUsage() {}
 
+func (t *testPeer) TryClose(objectTTL time.Duration) (res bool, err error) {
+	return true, t.Close()
+}
+
 func (t *testPeer) Close() error {
 	select {
 	case <-t.closed:

net/rpc/rpctest/pool.go

@@ -103,6 +103,10 @@ type testPeer struct {
 	drpc.Conn
 }
 
+func (t testPeer) TryClose(objectTTL time.Duration) (res bool, err error) {
+	return true, t.Close()
+}
+
 func (t testPeer) Id() string {
 	return t.id
 }

net/timeoutconn/conn.go

@@ -2,14 +2,15 @@ package timeoutconn
 
 import (
 	"errors"
-	"github.com/anytypeio/any-sync/app/logger"
-	"go.uber.org/zap"
 	"net"
 	"os"
 	"time"
+
+	"github.com/anytypeio/any-sync/app/logger"
+	"go.uber.org/zap"
 )
 
-var log = logger.NewNamed("net.timeoutconn")
+var log = logger.NewNamed("common.net.timeoutconn")
 
 type Conn struct {
 	net.Conn

nodeconf/mock_nodeconf/mock_nodeconf.go

@@ -157,6 +157,20 @@ func (mr *MockConfigurationMockRecorder) ConsensusPeers() *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ConsensusPeers", reflect.TypeOf((*MockConfiguration)(nil).ConsensusPeers))
 }
 
+// CoordinatorPeers mocks base method.
+func (m *MockConfiguration) CoordinatorPeers() []string {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "CoordinatorPeers")
+	ret0, _ := ret[0].([]string)
+	return ret0
+}
+
+// CoordinatorPeers indicates an expected call of CoordinatorPeers.
+func (mr *MockConfigurationMockRecorder) CoordinatorPeers() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CoordinatorPeers", reflect.TypeOf((*MockConfiguration)(nil).CoordinatorPeers))
+}
+
 // FilePeers mocks base method.
 func (m *MockConfiguration) FilePeers() []string {
 	m.ctrl.T.Helper()

util/crc16/crc16.go

@@ -0,0 +1,122 @@
+// Package crc16 is implementation according to CCITT standards.
+//
+// Note by @antirez: this is actually the XMODEM CRC 16 algorithm, using the
+// following parameters:
+//
+// Name                       : "XMODEM", also known as "ZMODEM", "CRC-16/ACORN"
+// Width                      : 16 bit
+// Poly                       : 1021 (That is actually x^16 + x^12 + x^5 + 1)
+// Initialization             : 0000
+// Reflect Input byte         : False
+// Reflect Output CRC         : False
+// Xor constant to output CRC : 0000
+// Output for "123456789"     : 31C3
+//
+// ported from the c++ code in the stellar-core codebase
+// (https://github.com/stellar/stellar-core).  The code is licensed
+// as:
+/*
+ * Copyright 2001-2010 Georges Menie (www.menie.org)
+ * Copyright 2010-2012 Salvatore Sanfilippo (adapted to Redis coding style)
+ * Copyright 2015 Stellar Development Foundation (ported to go)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the University of California, Berkeley nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package crc16
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+)
+
+// ErrInvalidChecksum is returned when Validate determines either the checksum
+// or the payload has been corrupted
+var ErrInvalidChecksum = fmt.Errorf("invalid checksum")
+
+var crc16tab = [256]uint16{
+	0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
+	0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
+	0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
+	0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
+	0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
+	0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
+	0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
+	0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
+	0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
+	0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
+	0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
+	0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
+	0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
+	0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
+	0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
+	0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
+	0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
+	0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
+	0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
+	0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
+	0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
+	0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+	0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
+	0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
+	0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
+	0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
+	0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
+	0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
+	0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
+	0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
+	0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
+	0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0,
+}
+
+// Checksum returns the 2-byte checksum for the provided data
+func Checksum(data []byte) []byte {
+	var crc uint16
+	var out bytes.Buffer
+	for _, b := range data {
+		crc = ((crc << 8) & 0xffff) ^ crc16tab[((crc>>8)^uint16(b))&0x00FF]
+	}
+
+	err := binary.Write(&out, binary.LittleEndian, crc)
+	if err != nil {
+		panic(err)
+	}
+
+	return out.Bytes()
+}
+
+// Validate returns an error if the provided checksum does not match
+// the calculated checksum of the provided data
+func Validate(data []byte, expected []byte) error {
+
+	actual := Checksum(data)
+
+	// validate the provided checksum against the calculated
+	if !bytes.Equal(actual, expected) {
+		return ErrInvalidChecksum
+	}
+
+	return nil
+}

util/strkey/strkey.go

@@ -0,0 +1,117 @@
+package strkey
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+	"github.com/anytypeio/any-sync/util/crc16"
+
+	"github.com/mr-tron/base58/base58"
+)
+
+// ErrInvalidVersionByte is returned when the version byte from a provided
+// strkey-encoded string is not one of the valid values.
+var ErrInvalidVersionByte = fmt.Errorf("invalid version byte")
+
+// VersionByte represents one of the possible prefix values for a StrKey base
+// string--the string the when encoded using base58 yields a final StrKey.
+type VersionByte byte
+
+// Decode decodes the provided StrKey into a raw value, checking the checksum
+// and ensuring the expected VersionByte (the version parameter) is the value
+// actually encoded into the provided src string.
+func Decode(expected VersionByte, src string) ([]byte, error) {
+	raw, err := decodeString(src)
+	if err != nil {
+		return nil, err
+	}
+
+	// decode into components
+	version := VersionByte(raw[0])
+	vp := raw[0 : len(raw)-2]
+	payload := raw[1 : len(raw)-2]
+	checksum := raw[len(raw)-2:]
+
+	// ensure version byte is expected
+	if version != expected {
+		return nil, ErrInvalidVersionByte
+	}
+
+	// ensure checksum is valid
+	if err := crc16.Validate(vp, checksum); err != nil {
+		return nil, err
+	}
+
+	// if we made it through the gaunlet, return the decoded value
+	return payload, nil
+}
+
+// MustDecode is like Decode, but panics on error
+func MustDecode(expected VersionByte, src string) []byte {
+	d, err := Decode(expected, src)
+	if err != nil {
+		panic(err)
+	}
+	return d
+}
+
+// Encode encodes the provided data to a StrKey, using the provided version
+// byte.
+func Encode(version VersionByte, src []byte) (string, error) {
+	var raw bytes.Buffer
+
+	// write version byte
+	if err := binary.Write(&raw, binary.LittleEndian, version); err != nil {
+		return "", err
+	}
+
+	// write payload
+	if _, err := raw.Write(src); err != nil {
+		return "", err
+	}
+
+	// calculate and write checksum
+	checksum := crc16.Checksum(raw.Bytes())
+	if _, err := raw.Write(checksum); err != nil {
+		return "", err
+	}
+
+	result := base58.FastBase58Encoding(raw.Bytes())
+	return result, nil
+}
+
+// MustEncode is like Encode, but panics on error
+func MustEncode(version VersionByte, src []byte) string {
+	e, err := Encode(version, src)
+	if err != nil {
+		panic(err)
+	}
+	return e
+}
+
+// Version extracts and returns the version byte from the provided source
+// string.
+func Version(src string) (VersionByte, error) {
+	raw, err := decodeString(src)
+	if err != nil {
+		return VersionByte(0), err
+	}
+
+	return VersionByte(raw[0]), nil
+}
+
+// decodeString decodes a base58 string into the raw bytes, and ensures it could
+// potentially be strkey encoded (i.e. it has both a version byte and a
+// checksum, neither of which are explicitly checked by this func)
+func decodeString(src string) ([]byte, error) {
+	raw, err := base58.FastBase58Decoding(src)
+	if err != nil {
+		return nil, fmt.Errorf("base58 decode failed: %s", err)
+	}
+
+	if len(raw) < 3 {
+		return nil, fmt.Errorf("encoded value is %d bytes; minimum valid length is 3", len(raw))
+	}
+
+	return raw, nil
+}

util/strkey/versions.go

@@ -0,0 +1,7 @@
+package strkey
+
+const (
+	AccountAddressVersionByte VersionByte = 0x5b // Base58-encodes to 'A...'
+	AccountSeedVersionByte    VersionByte = 0xff // Base58-encodes to 'S...'
+	DeviceSeedVersionByte     VersionByte = 0x7d // Base58-encodes to 'D...'
+)