network: integrate state sync module with blockfetcher

Close #3574

Signed-off-by: Ekaterina Pavlova <[email protected]>

internal/fakechain/fakechain.go

@@ -469,3 +469,8 @@ func (s *FakeStateSync) Traverse(root util.Uint256, process func(node mpt.Node,
 func (s *FakeStateSync) GetUnknownMPTNodesBatch(limit int) []util.Uint256 {
 	panic("TODO")
 }
+
+// GetConfig implements the StateSync interface.
+func (s *FakeStateSync) GetConfig() config.Blockchain {
+	panic("TODO")
+}

pkg/config/blockfetcher_config.go

@@ -21,6 +21,7 @@ type NeoFSBlockFetcher struct {
 	BQueueSize             int           `yaml:"BQueueSize"`
 	SkipIndexFilesSearch   bool          `yaml:"SkipIndexFilesSearch"`
 	IndexFileSize          uint32        `yaml:"IndexFileSize"`
+	BlocksOnly             bool          `yaml:"BlocksOnly"`
 }
 
 // Validate checks NeoFSBlockFetcher for internal consistency and ensures

pkg/config/config.go

@@ -64,6 +64,7 @@ func (c Config) Blockchain() Blockchain {
 	return Blockchain{
 		ProtocolConfiguration: c.ProtocolConfiguration,
 		Ledger:                c.ApplicationConfiguration.Ledger,
+		NeoFSBlockFetcher:     c.ApplicationConfiguration.NeoFSBlockFetcher,
 	}
 }
 

pkg/config/ledger_config.go

@@ -29,4 +29,5 @@ type Ledger struct {
 type Blockchain struct {
 	ProtocolConfiguration
 	Ledger
+	NeoFSBlockFetcher
 }

pkg/core/blockchain.go

@@ -285,7 +285,7 @@ func NewBlockchain(s storage.Store, cfg config.Blockchain, log *zap.Logger) (*Bl
 			zap.Uint32("MaxValidUntilBlockIncrement", cfg.MaxValidUntilBlockIncrement))
 	}
 	if cfg.P2PStateExchangeExtensions {
-		if !cfg.StateRootInHeader {
+		if !cfg.StateRootInHeader && !cfg.NeoFSBlockFetcher.Enabled {
 			return nil, errors.New("P2PStatesExchangeExtensions are enabled, but StateRootInHeader is off")
 		}
 		if cfg.KeepOnlyLatestState && !cfg.RemoveUntraceableBlocks {

pkg/core/statesync/module.go

@@ -516,3 +516,8 @@ func (s *Module) GetUnknownMPTNodesBatch(limit int) []util.Uint256 {
 
 	return s.mptpool.GetBatch(limit)
 }
+
+// GetConfig returns current blockchain configuration.
+func (s *Module) GetConfig() config.Blockchain {
+	return s.bc.GetConfig()
+}

pkg/network/bqueue/queue.go

@@ -5,6 +5,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
 	"go.uber.org/zap"
 )
@@ -15,6 +16,7 @@ type Blockqueuer interface {
 	AddHeaders(...*block.Header) error
 	BlockHeight() uint32
 	HeaderHeight() uint32
+	GetConfig() config.Blockchain
 }
 
 // OperationMode is the mode of operation for the block queue.

pkg/network/server.go

@@ -109,6 +109,7 @@ type (
 		notaryRequestPool *mempool.Pool
 		extensiblePool    *extpool.Pool
 		notaryFeer        NotaryFeer
+		headerFetcher     *blockfetcher.Service
 		blockFetcher      *blockfetcher.Service
 
 		serviceLock    sync.RWMutex
@@ -227,10 +228,23 @@ func newServerFromConstructors(config ServerConfig, chain Ledger, stSync StateSy
 	if s.NeoFSBlockFetcherCfg.BQueueSize <= 0 {
 		s.NeoFSBlockFetcherCfg.BQueueSize = blockfetcher.DefaultQueueCacheSize
 	}
-	s.bFetcherQueue = bqueue.New(chain, log, nil, s.NeoFSBlockFetcherCfg.BQueueSize, updateBlockQueueLenMetric, bqueue.Blocking)
-	var err error
-	s.blockFetcher, err = blockfetcher.New(chain, s.NeoFSBlockFetcherCfg, log, s.bFetcherQueue.PutBlock,
-		sync.OnceFunc(func() { close(s.blockFetcherFin) }))
+	var (
+		err error
+		bq  bqueue.Blockqueuer = s.chain
+	)
+	if s.config.P2PStateExchangeExtensions {
+		bq = s.stateSync
+	}
+	s.bFetcherQueue = bqueue.New(bq, log, nil, s.NeoFSBlockFetcherCfg.BQueueSize, updateBlockQueueLenMetric, bqueue.Blocking)
+	s.headerFetcher, err = blockfetcher.New(bq, s.NeoFSBlockFetcherCfg, log, s.bFetcherQueue.PutBlock, s.bFetcherQueue.PutHeader,
+		func() {
+			s.log.Info("NeoFS BlockFetcher finished headers downloading")
+		})
+	if err != nil {
+		return nil, fmt.Errorf("failed to create NeoFS BlockFetcher: %w", err)
+	}
+	s.NeoFSBlockFetcherCfg.BlocksOnly = true
+	s.blockFetcher, err = blockfetcher.New(bq, s.NeoFSBlockFetcherCfg, log, s.bFetcherQueue.PutBlock, s.bFetcherQueue.PutHeader, sync.OnceFunc(func() { close(s.blockFetcherFin) }))
 	if err != nil {
 		return nil, fmt.Errorf("failed to create NeoFS BlockFetcher: %w", err)
 	}
@@ -311,12 +325,6 @@ func (s *Server) Start() {
 	go s.bQueue.Run()
 	go s.bSyncQueue.Run()
 	go s.bFetcherQueue.Run()
-	if s.ServerConfig.NeoFSBlockFetcherCfg.Enabled {
-		err := s.blockFetcher.Start()
-		if err != nil {
-			s.log.Error("skipping NeoFS BlockFetcher", zap.Error(err))
-		}
-	}
 	for _, tr := range s.transports {
 		go tr.Accept()
 	}
@@ -333,7 +341,12 @@ func (s *Server) Shutdown() {
 	s.log.Info("shutting down server", zap.Int("peers", s.PeerCount()))
 	if s.ServerConfig.NeoFSBlockFetcherCfg.Enabled {
 		s.bFetcherQueue.Discard()
-		s.blockFetcher.Shutdown()
+		if s.headerFetcher.IsActive() {
+			s.headerFetcher.Shutdown()
+		}
+		if s.blockFetcher.IsActive() {
+			s.blockFetcher.Shutdown()
+		}
 	}
 	for _, tr := range s.transports {
 		tr.Close()
@@ -732,7 +745,7 @@ func (s *Server) IsInSync() bool {
 	var peersNumber int
 	var notHigher int
 
-	if s.stateSync.IsActive() || s.blockFetcher.IsActive() {
+	if s.stateSync.IsActive() || s.headerFetcher.IsActive() || s.blockFetcher.IsActive() {
 		return false
 	}
 
@@ -792,7 +805,7 @@ func (s *Server) handleVersionCmd(p Peer, version *payload.Version) error {
 
 // handleBlockCmd processes the block received from its peer.
 func (s *Server) handleBlockCmd(p Peer, block *block.Block) error {
-	if s.blockFetcher.IsActive() {
+	if s.headerFetcher.IsActive() || s.blockFetcher.IsActive() {
 		return nil
 	}
 	if s.stateSync.IsActive() {
@@ -815,15 +828,23 @@ func (s *Server) handlePing(p Peer, ping *payload.Ping) error {
 }
 
 func (s *Server) requestBlocksOrHeaders(p Peer) error {
-	if s.blockFetcher.IsActive() {
-		return nil
-	}
 	if s.stateSync.NeedHeaders() {
-		if s.chain.HeaderHeight() < p.LastBlockIndex() {
+		if s.chain.HeaderHeight() < p.LastBlockIndex() || s.NeoFSBlockFetcherCfg.Enabled {
 			return s.requestHeaders(p)
 		}
 		return nil
 	}
+	if s.headerFetcher.IsActive() {
+		s.headerFetcher.Shutdown()
+	}
+	if s.ServerConfig.NeoFSBlockFetcherCfg.Enabled {
+		if ((s.stateSync.IsActive() && s.headerFetcher.IsShutdown()) || !s.stateSync.IsActive()) && !s.blockFetcher.IsShutdown() {
+			if err := s.blockFetcher.Start(); err != nil {
+				s.log.Error("skipping NeoFS BlockFetcher", zap.Error(err))
+			}
+		}
+	}
+
 	var (
 		bq              bqueue.Blockqueuer = s.chain
 		requestMPTNodes bool
@@ -847,6 +868,16 @@ func (s *Server) requestBlocksOrHeaders(p Peer) error {
 
 // requestHeaders sends a CMDGetHeaders message to the peer to sync up in headers.
 func (s *Server) requestHeaders(p Peer) error {
+	if s.ServerConfig.NeoFSBlockFetcherCfg.Enabled {
+		if !s.headerFetcher.IsShutdown() {
+			err := s.headerFetcher.Start()
+			if err != nil {
+				s.log.Error("skipping NeoFS BlockFetcher", zap.Error(err))
+			} else {
+				return err
+			}
+		}
+	}
 	pl := getRequestBlocksPayload(p, s.chain.HeaderHeight(), &s.lastRequestedHeader)
 	return p.EnqueueP2PMessage(NewMessage(CMDGetHeaders, pl))
 }
@@ -1136,7 +1167,7 @@ func (s *Server) handleGetHeadersCmd(p Peer, gh *payload.GetBlockByIndex) error
 
 // handleHeadersCmd processes headers payload.
 func (s *Server) handleHeadersCmd(p Peer, h *payload.Headers) error {
-	if s.blockFetcher.IsActive() {
+	if s.headerFetcher.IsActive() {
 		return nil
 	}
 	return s.stateSync.AddHeaders(h.Hdrs...)
@@ -1335,6 +1366,9 @@ func (s *Server) handleGetAddrCmd(p Peer) error {
 // 2. Send requests for chunk in increasing order.
 // 3. After all requests have been sent, request random height.
 func (s *Server) requestBlocks(bq bqueue.Blockqueuer, p Peer) error {
+	if s.blockFetcher.IsActive() {
+		return nil
+	}
 	pl := getRequestBlocksPayload(p, bq.BlockHeight(), &s.lastRequestedBlock)
 	lq, capLeft := s.bQueue.LastQueued()
 	if capLeft == 0 {
@@ -1468,9 +1502,6 @@ func (s *Server) handleMessage(peer Peer, msg *Message) error {
 }
 
 func (s *Server) tryInitStateSync() {
-	if s.blockFetcher.IsActive() {
-		return
-	}
 	if !s.stateSync.IsActive() {
 		s.bSyncQueue.Discard()
 		return

pkg/network/state_sync.go

@@ -1,6 +1,7 @@
 package network
 
 import (
+	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/core/mpt"
 	"github.com/nspcc-dev/neo-go/pkg/network/bqueue"
 	"github.com/nspcc-dev/neo-go/pkg/util"
@@ -17,4 +18,5 @@ type StateSync interface {
 	NeedHeaders() bool
 	NeedMPTNodes() bool
 	Traverse(root util.Uint256, process func(node mpt.Node, nodeBytes []byte) bool) error
+	GetConfig() config.Blockchain
 }

pkg/services/blockfetcher/blockfetcher.go

@@ -36,6 +36,7 @@ const (
 type Ledger interface {
 	GetConfig() config.Blockchain
 	BlockHeight() uint32
+	HeaderHeight() uint32
 }
 
 // poolWrapper wraps a NeoFS pool to adapt its Close method to return an error.
@@ -52,15 +53,18 @@ func (p poolWrapper) Close() error {
 // Service is a service that fetches blocks from NeoFS.
 type Service struct {
 	// isActive denotes whether the service is working or in the process of shutdown.
-	isActive          atomic.Bool
+	isActive atomic.Bool
+	// isShutdown denotes whether the service is shutdown after running.
+	isShutdown        atomic.Bool
 	log               *zap.Logger
 	cfg               config.NeoFSBlockFetcher
 	stateRootInHeader bool
 
-	chain        Ledger
-	pool         poolWrapper
-	enqueueBlock func(*block.Block) error
-	account      *wallet.Account
+	chain         Ledger
+	pool          poolWrapper
+	enqueueBlock  func(*block.Block) error
+	enqueueHeader func(*block.Header) error
+	account       *wallet.Account
 
 	oidsCh chan oid.ID
 	// wg is a wait group for block downloaders.
@@ -81,7 +85,7 @@ type Service struct {
 }
 
 // New creates a new BlockFetcher Service.
-func New(chain Ledger, cfg config.NeoFSBlockFetcher, logger *zap.Logger, putBlock func(*block.Block) error, shutdownCallback func()) (*Service, error) {
+func New(chain Ledger, cfg config.NeoFSBlockFetcher, logger *zap.Logger, putBlock func(*block.Block) error, putHeader func(*block.Header) error, shutdownCallback func()) (*Service, error) {
 	var (
 		account *wallet.Account
 		err     error
@@ -143,6 +147,7 @@ func New(chain Ledger, cfg config.NeoFSBlockFetcher, logger *zap.Logger, putBloc
 		cfg:   cfg,
 
 		enqueueBlock:      putBlock,
+		enqueueHeader:     putHeader,
 		account:           account,
 		stateRootInHeader: chain.GetConfig().StateRootInHeader,
 		shutdownCallback:  shutdownCallback,
@@ -162,7 +167,7 @@ func New(chain Ledger, cfg config.NeoFSBlockFetcher, logger *zap.Logger, putBloc
 
 // Start runs the NeoFS BlockFetcher service.
 func (bfs *Service) Start() error {
-	if !bfs.isActive.CompareAndSwap(false, true) {
+	if !bfs.isActive.CompareAndSwap(false, true) || bfs.IsShutdown() {
 		return nil
 	}
 	bfs.log.Info("starting NeoFS BlockFetcher service")
@@ -262,7 +267,11 @@ func (bfs *Service) blockDownloader() {
 		case <-bfs.ctx.Done():
 			return
 		default:
-			err = bfs.enqueueBlock(b)
+			if !bfs.cfg.BlocksOnly {
+				err = bfs.enqueueHeader(&b.Header)
+			} else {
+				err = bfs.enqueueBlock(b)
+			}
 			if err != nil {
 				bfs.log.Error("failed to enqueue block", zap.Uint32("index", b.Index), zap.Error(err))
 				bfs.stopService(true)
@@ -275,6 +284,9 @@ func (bfs *Service) blockDownloader() {
 // fetchOIDsFromIndexFiles fetches block OIDs from NeoFS by searching index files first.
 func (bfs *Service) fetchOIDsFromIndexFiles() error {
 	h := bfs.chain.BlockHeight()
+	if !bfs.cfg.BlocksOnly {
+		h = bfs.chain.HeaderHeight()
+	}
 	startIndex := h / bfs.cfg.IndexFileSize
 	skip := h % bfs.cfg.IndexFileSize
 
@@ -425,7 +437,7 @@ func (bfs *Service) readBlock(rc io.ReadCloser) (*block.Block, error) {
 // block OIDs search, cancels all in-progress downloading operations and waits
 // until all service routines finish their work.
 func (bfs *Service) Shutdown() {
-	if !bfs.IsActive() {
+	if !bfs.IsActive() || bfs.IsShutdown() {
 		return
 	}
 	bfs.stopService(true)
@@ -444,13 +456,17 @@ func (bfs *Service) stopService(force bool) {
 // exiter is a routine that is listening to a quitting signal and manages graceful
 // Service shutdown process.
 func (bfs *Service) exiter() {
+	if !bfs.isActive.Load() {
+		return
+	}
 	// Closing signal may come from anyone, but only once.
 	force := <-bfs.quit
 	bfs.log.Info("shutting down NeoFS BlockFetcher service",
 		zap.Bool("force", force),
 	)
 
 	bfs.isActive.CompareAndSwap(true, false)
+	bfs.isShutdown.CompareAndSwap(false, true)
 	// Cansel all pending OIDs/blocks downloads in case if shutdown requested by user
 	// or caused by downloading error.
 	if force {
@@ -482,6 +498,12 @@ func (bfs *Service) IsActive() bool {
 	return bfs.isActive.Load()
 }
 
+// IsShutdown returns true if the NeoFS BlockFetcher service is completely shutdown.
+// The service can not be started again.
+func (bfs *Service) IsShutdown() bool {
+	return bfs.isShutdown.Load()
+}
+
 // retry function with exponential backoff.
 func (bfs *Service) retry(action func() error) error {
 	var (