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baseSync.go
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baseSync.go
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package sync
import (
"bytes"
"context"
"math"
"sync"
"time"
"github.com/ElrondNetwork/elrond-go-core/core"
"github.com/ElrondNetwork/elrond-go-core/core/check"
"github.com/ElrondNetwork/elrond-go-core/core/closing"
"github.com/ElrondNetwork/elrond-go-core/data"
"github.com/ElrondNetwork/elrond-go-core/data/block"
"github.com/ElrondNetwork/elrond-go-core/data/typeConverters"
"github.com/ElrondNetwork/elrond-go-core/hashing"
"github.com/ElrondNetwork/elrond-go-core/marshal"
logger "github.com/ElrondNetwork/elrond-go-logger"
"github.com/ElrondNetwork/elrond-go/common"
"github.com/ElrondNetwork/elrond-go/consensus"
"github.com/ElrondNetwork/elrond-go/dataRetriever"
"github.com/ElrondNetwork/elrond-go/dblookupext"
"github.com/ElrondNetwork/elrond-go/outport"
"github.com/ElrondNetwork/elrond-go/process"
"github.com/ElrondNetwork/elrond-go/sharding"
"github.com/ElrondNetwork/elrond-go/state"
"github.com/ElrondNetwork/elrond-go/storage"
)
var log = logger.GetOrCreate("process/sync")
var _ closing.Closer = (*baseBootstrap)(nil)
// sleepTime defines the time in milliseconds between each iteration made in syncBlocks method
const sleepTime = 5 * time.Millisecond
// hdrInfo hold the data related to a header
type hdrInfo struct {
Nonce uint64
Hash []byte
}
type notarizedInfo struct {
lastNotarized map[uint32]*hdrInfo
finalNotarized map[uint32]*hdrInfo
blockWithLastNotarized map[uint32]uint64
blockWithFinalNotarized map[uint32]uint64
startNonce uint64
}
type baseBootstrap struct {
historyRepo dblookupext.HistoryRepository
headers dataRetriever.HeadersPool
chainHandler data.ChainHandler
blockProcessor process.BlockProcessor
store dataRetriever.StorageService
roundHandler consensus.RoundHandler
hasher hashing.Hasher
marshalizer marshal.Marshalizer
epochHandler dataRetriever.EpochHandler
forkDetector process.ForkDetector
requestHandler process.RequestHandler
shardCoordinator sharding.Coordinator
accounts state.AccountsAdapter
blockBootstrapper blockBootstrapper
blackListHandler process.TimeCacher
mutHeader sync.RWMutex
headerNonce *uint64
headerhash []byte
chRcvHdrNonce chan bool
chRcvHdrHash chan bool
requestedHashes process.RequiredDataPool
statusHandler core.AppStatusHandler
chStopSync chan bool
waitTime time.Duration
mutNodeState sync.RWMutex
isNodeSynchronized bool
isNodeStateCalculated bool
hasLastBlock bool
roundIndex int64
forkInfo *process.ForkInfo
mutRcvHdrNonce sync.RWMutex
mutRcvHdrHash sync.RWMutex
syncStateListeners []func(bool)
mutSyncStateListeners sync.RWMutex
uint64Converter typeConverters.Uint64ByteSliceConverter
mapNonceSyncedWithErrors map[uint64]uint32
mutNonceSyncedWithErrors sync.RWMutex
requestMiniBlocks func(headerHandler data.HeaderHandler)
networkWatcher process.NetworkConnectionWatcher
getHeaderFromPool func([]byte) (data.HeaderHandler, error)
headerStore storage.Storer
headerNonceHashStore storage.Storer
syncStarter syncStarter
bootStorer process.BootStorer
storageBootstrapper process.BootstrapperFromStorage
currentEpochProvider process.CurrentNetworkEpochProviderHandler
outportHandler outport.OutportHandler
accountsDBSyncer process.AccountsDBSyncer
chRcvMiniBlocks chan bool
mutRcvMiniBlocks sync.Mutex
miniBlocksProvider process.MiniBlockProvider
poolsHolder dataRetriever.PoolsHolder
mutRequestHeaders sync.Mutex
cancelFunc func()
isInImportMode bool
scheduledTxsExecutionHandler process.ScheduledTxsExecutionHandler
}
// setRequestedHeaderNonce method sets the header nonce requested by the sync mechanism
func (boot *baseBootstrap) setRequestedHeaderNonce(nonce *uint64) {
boot.mutHeader.Lock()
boot.headerNonce = nonce
boot.mutHeader.Unlock()
}
// setRequestedHeaderHash method sets the header hash requested by the sync mechanism
func (boot *baseBootstrap) setRequestedHeaderHash(hash []byte) {
boot.mutHeader.Lock()
boot.headerhash = hash
boot.mutHeader.Unlock()
}
// requestedHeaderNonce method gets the header nonce requested by the sync mechanism
func (boot *baseBootstrap) requestedHeaderNonce() *uint64 {
boot.mutHeader.RLock()
defer boot.mutHeader.RUnlock()
return boot.headerNonce
}
// requestedHeaderHash method gets the header hash requested by the sync mechanism
func (boot *baseBootstrap) requestedHeaderHash() []byte {
boot.mutHeader.RLock()
defer boot.mutHeader.RUnlock()
return boot.headerhash
}
func (boot *baseBootstrap) processReceivedHeader(headerHandler data.HeaderHandler, headerHash []byte) {
if boot.shardCoordinator.SelfId() != headerHandler.GetShardID() {
return
}
log.Trace("received header from network",
"shard", headerHandler.GetShardID(),
"round", headerHandler.GetRound(),
"nonce", headerHandler.GetNonce(),
"hash", headerHash,
)
err := boot.forkDetector.AddHeader(headerHandler, headerHash, process.BHReceived, nil, nil)
if err != nil {
log.Debug("forkDetector.AddHeader", "error", err.Error())
}
go boot.requestMiniBlocks(headerHandler)
boot.confirmHeaderReceivedByNonce(headerHandler, headerHash)
boot.confirmHeaderReceivedByHash(headerHandler, headerHash)
}
func (boot *baseBootstrap) confirmHeaderReceivedByNonce(headerHandler data.HeaderHandler, hdrHash []byte) {
boot.mutRcvHdrNonce.Lock()
n := boot.requestedHeaderNonce()
if n != nil && *n == headerHandler.GetNonce() {
log.Debug("received requested header from network",
"shard", headerHandler.GetShardID(),
"round", headerHandler.GetRound(),
"nonce", headerHandler.GetNonce(),
"hash", hdrHash,
)
boot.setRequestedHeaderNonce(nil)
boot.mutRcvHdrNonce.Unlock()
boot.chRcvHdrNonce <- true
return
}
boot.mutRcvHdrNonce.Unlock()
}
func (boot *baseBootstrap) confirmHeaderReceivedByHash(headerHandler data.HeaderHandler, hdrHash []byte) {
boot.mutRcvHdrHash.Lock()
hash := boot.requestedHeaderHash()
if hash != nil && bytes.Equal(hash, hdrHash) {
log.Debug("received requested header from network",
"shard", headerHandler.GetShardID(),
"round", headerHandler.GetRound(),
"nonce", headerHandler.GetNonce(),
"hash", hash,
)
boot.setRequestedHeaderHash(nil)
boot.mutRcvHdrHash.Unlock()
boot.chRcvHdrHash <- true
return
}
boot.mutRcvHdrHash.Unlock()
}
// AddSyncStateListener adds a syncStateListener that get notified each time the sync status of the node changes
func (boot *baseBootstrap) AddSyncStateListener(syncStateListener func(isSyncing bool)) {
boot.mutSyncStateListeners.Lock()
boot.syncStateListeners = append(boot.syncStateListeners, syncStateListener)
boot.mutSyncStateListeners.Unlock()
}
func (boot *baseBootstrap) notifySyncStateListeners(isNodeSynchronized bool) {
boot.mutSyncStateListeners.RLock()
for i := 0; i < len(boot.syncStateListeners); i++ {
go boot.syncStateListeners[i](isNodeSynchronized)
}
boot.mutSyncStateListeners.RUnlock()
}
// getNonceForNextBlock will get the nonce for the next block
func (boot *baseBootstrap) getNonceForNextBlock() uint64 {
nonce := boot.chainHandler.GetGenesisHeader().GetNonce() + 1 // first block nonce after genesis block
currentBlockHeader := boot.chainHandler.GetCurrentBlockHeader()
if !check.IfNil(currentBlockHeader) {
nonce = currentBlockHeader.GetNonce() + 1
}
return nonce
}
// getNonceForCurrentBlock will get the nonce for the current block
func (boot *baseBootstrap) getNonceForCurrentBlock() uint64 {
nonce := boot.chainHandler.GetGenesisHeader().GetNonce() // genesis block nonce
currentBlockHeader := boot.chainHandler.GetCurrentBlockHeader()
if !check.IfNil(currentBlockHeader) {
nonce = currentBlockHeader.GetNonce()
}
return nonce
}
// getEpochOfCurrentBlock will get the epoch for the current block as stored in the chain handler implementation
func (boot *baseBootstrap) getEpochOfCurrentBlock() uint32 {
epoch := boot.chainHandler.GetGenesisHeader().GetEpoch()
currentBlockHeader := boot.chainHandler.GetCurrentBlockHeader()
if !check.IfNil(currentBlockHeader) {
epoch = currentBlockHeader.GetEpoch()
}
return epoch
}
// waitForHeaderNonce method wait for header with the requested nonce to be received
func (boot *baseBootstrap) waitForHeaderNonce() error {
select {
case <-boot.chRcvHdrNonce:
return nil
case <-time.After(boot.waitTime):
return process.ErrTimeIsOut
}
}
// waitForHeaderHash method wait for header with the requested hash to be received
func (boot *baseBootstrap) waitForHeaderHash() error {
select {
case <-boot.chRcvHdrHash:
return nil
case <-time.After(boot.waitTime):
return process.ErrTimeIsOut
}
}
func (boot *baseBootstrap) computeNodeState() {
boot.mutNodeState.Lock()
defer boot.mutNodeState.Unlock()
isNodeStateCalculatedInCurrentRound := boot.roundIndex == boot.roundHandler.Index() && boot.isNodeStateCalculated
if isNodeStateCalculatedInCurrentRound {
return
}
boot.forkInfo = boot.forkDetector.CheckFork()
genesisNonce := boot.chainHandler.GetGenesisHeader().GetNonce()
currentHeader := boot.chainHandler.GetCurrentBlockHeader()
if check.IfNil(currentHeader) {
boot.hasLastBlock = boot.forkDetector.ProbableHighestNonce() == genesisNonce
log.Debug("computeNodeState",
"probableHighestNonce", boot.forkDetector.ProbableHighestNonce(),
"currentBlockNonce", nil,
"boot.hasLastBlock", boot.hasLastBlock)
} else {
boot.hasLastBlock = boot.forkDetector.ProbableHighestNonce() <= boot.chainHandler.GetCurrentBlockHeader().GetNonce()
log.Debug("computeNodeState",
"probableHighestNonce", boot.forkDetector.ProbableHighestNonce(),
"currentBlockNonce", boot.chainHandler.GetCurrentBlockHeader().GetNonce(),
"boot.hasLastBlock", boot.hasLastBlock)
}
isNodeConnectedToTheNetwork := boot.networkWatcher.IsConnectedToTheNetwork()
isNodeSynchronized := !boot.forkInfo.IsDetected && boot.hasLastBlock && isNodeConnectedToTheNetwork
if isNodeSynchronized != boot.isNodeSynchronized {
log.Debug("node has changed its synchronized state",
"state", isNodeSynchronized,
)
}
boot.isNodeSynchronized = isNodeSynchronized
boot.isNodeStateCalculated = true
boot.roundIndex = boot.roundHandler.Index()
boot.notifySyncStateListeners(isNodeSynchronized)
result := uint64(1)
if isNodeSynchronized {
result = uint64(0)
}
boot.statusHandler.SetUInt64Value(common.MetricIsSyncing, result)
log.Debug("computeNodeState",
"isNodeStateCalculated", boot.isNodeStateCalculated,
"isNodeSynchronized", boot.isNodeSynchronized)
if boot.shouldTryToRequestHeaders() {
go boot.requestHeadersIfSyncIsStuck()
}
}
func (boot *baseBootstrap) shouldTryToRequestHeaders() bool {
if boot.roundHandler.BeforeGenesis() {
return false
}
if boot.isForcedRollBackOneBlock() {
return false
}
if boot.isForcedRollBackToNonce() {
return false
}
if !boot.isNodeSynchronized {
return true
}
return boot.roundHandler.Index()%process.RoundModulusTriggerWhenSyncIsStuck == 0
}
func (boot *baseBootstrap) requestHeadersIfSyncIsStuck() {
lastSyncedRound := boot.chainHandler.GetGenesisHeader().GetRound()
currHeader := boot.chainHandler.GetCurrentBlockHeader()
if !check.IfNil(currHeader) {
lastSyncedRound = currHeader.GetRound()
}
roundDiff := uint64(boot.roundHandler.Index()) - lastSyncedRound
if roundDiff <= process.MaxRoundsWithoutNewBlockReceived {
return
}
fromNonce := boot.getNonceForNextBlock()
numHeadersToRequest := core.MinUint64(process.MaxHeadersToRequestInAdvance, roundDiff-1)
toNonce := fromNonce + numHeadersToRequest - 1
if fromNonce > toNonce {
return
}
log.Debug("requestHeadersIfSyncIsStuck",
"from nonce", fromNonce,
"to nonce", toNonce,
"probable highest nonce", boot.forkDetector.ProbableHighestNonce())
boot.requestHeaders(fromNonce, toNonce)
}
func (boot *baseBootstrap) removeHeaderFromPools(header data.HeaderHandler) []byte {
hash, err := core.CalculateHash(boot.marshalizer, boot.hasher, header)
if err != nil {
log.Debug("CalculateHash", "error", err.Error())
return nil
}
log.Debug("removeHeaderFromPools",
"shard", header.GetShardID(),
"epoch", header.GetEpoch(),
"round", header.GetRound(),
"nonce", header.GetNonce(),
"hash", hash)
boot.headers.RemoveHeaderByHash(hash)
return hash
}
func (boot *baseBootstrap) removeHeadersHigherThanNonceFromPool(nonce uint64) {
shardID := boot.shardCoordinator.SelfId()
log.Debug("removeHeadersHigherThanNonceFromPool",
"shard", shardID,
"nonce", nonce)
nonces := boot.headers.Nonces(shardID)
for _, currentNonce := range nonces {
if currentNonce <= nonce {
continue
}
boot.headers.RemoveHeaderByNonceAndShardId(currentNonce, shardID)
}
}
func (boot *baseBootstrap) cleanCachesAndStorageOnRollback(header data.HeaderHandler) {
hash := boot.removeHeaderFromPools(header)
boot.forkDetector.RemoveHeader(header.GetNonce(), hash)
nonceToByteSlice := boot.uint64Converter.ToByteSlice(header.GetNonce())
_ = boot.headerNonceHashStore.Remove(nonceToByteSlice)
}
// checkBootstrapNilParameters will check the imput parameters for nil values
func checkBootstrapNilParameters(arguments ArgBaseBootstrapper) error {
if check.IfNil(arguments.ChainHandler) {
return process.ErrNilBlockChain
}
if check.IfNil(arguments.RoundHandler) {
return process.ErrNilRoundHandler
}
if check.IfNil(arguments.BlockProcessor) {
return process.ErrNilBlockProcessor
}
if check.IfNil(arguments.Hasher) {
return process.ErrNilHasher
}
if check.IfNil(arguments.Marshalizer) {
return process.ErrNilMarshalizer
}
if check.IfNil(arguments.ForkDetector) {
return process.ErrNilForkDetector
}
if check.IfNil(arguments.RequestHandler) {
return process.ErrNilRequestHandler
}
if check.IfNil(arguments.ShardCoordinator) {
return process.ErrNilShardCoordinator
}
if check.IfNil(arguments.Accounts) {
return process.ErrNilAccountsAdapter
}
if check.IfNil(arguments.Store) {
return process.ErrNilStore
}
if check.IfNil(arguments.BlackListHandler) {
return process.ErrNilBlackListCacher
}
if check.IfNil(arguments.NetworkWatcher) {
return process.ErrNilNetworkWatcher
}
if check.IfNil(arguments.BootStorer) {
return process.ErrNilBootStorer
}
if check.IfNil(arguments.MiniblocksProvider) {
return process.ErrNilMiniBlocksProvider
}
if check.IfNil(arguments.AppStatusHandler) {
return process.ErrNilAppStatusHandler
}
if check.IfNil(arguments.OutportHandler) {
return process.ErrNilOutportHandler
}
if check.IfNil(arguments.AccountsDBSyncer) {
return process.ErrNilAccountsDBSyncer
}
if check.IfNil(arguments.CurrentEpochProvider) {
return process.ErrNilCurrentNetworkEpochProvider
}
if check.IfNil(arguments.HistoryRepo) {
return process.ErrNilHistoryRepository
}
if check.IfNil(arguments.ScheduledTxsExecutionHandler) {
return process.ErrNilScheduledTxsExecutionHandler
}
return nil
}
func (boot *baseBootstrap) requestHeadersFromNonceIfMissing(fromNonce uint64) {
toNonce := core.MinUint64(fromNonce+process.MaxHeadersToRequestInAdvance-1, boot.forkDetector.ProbableHighestNonce())
if fromNonce > toNonce {
return
}
log.Debug("requestHeadersFromNonceIfMissing",
"from nonce", fromNonce,
"to nonce", toNonce,
"probable highest nonce", boot.forkDetector.ProbableHighestNonce())
boot.requestHeaders(fromNonce, toNonce)
}
// syncBlocks method calls repeatedly synchronization method SyncBlock
func (boot *baseBootstrap) syncBlocks(ctx context.Context) {
for {
select {
case <-ctx.Done():
log.Debug("bootstrap's go routine is stopping...")
return
case <-time.After(sleepTime):
}
if !boot.networkWatcher.IsConnectedToTheNetwork() {
continue
}
if boot.roundHandler.BeforeGenesis() {
continue
}
err := boot.syncStarter.SyncBlock(ctx)
if err != nil {
if common.IsContextDone(ctx) {
log.Debug("SyncBlock finished, bootstrap's go routine is stopping...")
return
}
log.Debug("SyncBlock", "error", err.Error())
}
}
}
func (boot *baseBootstrap) doJobOnSyncBlockFail(bodyHandler data.BodyHandler, headerHandler data.HeaderHandler, err error) {
processBlockStarted := !check.IfNil(bodyHandler) && !check.IfNil(headerHandler)
isProcessWithError := processBlockStarted && err != process.ErrTimeIsOut
numSyncedWithErrors := boot.incrementSyncedWithErrorsForNonce(boot.getNonceForNextBlock())
allowedSyncWithErrorsLimitReached := numSyncedWithErrors >= process.MaxSyncWithErrorsAllowed
isInProperRound := process.IsInProperRound(boot.roundHandler.Index())
isSyncWithErrorsLimitReachedInProperRound := allowedSyncWithErrorsLimitReached && isInProperRound
shouldRollBack := isProcessWithError || isSyncWithErrorsLimitReachedInProperRound
if shouldRollBack {
if !check.IfNil(headerHandler) {
hash := boot.removeHeaderFromPools(headerHandler)
boot.forkDetector.RemoveHeader(headerHandler.GetNonce(), hash)
}
errNotCritical := boot.rollBack(false)
if errNotCritical != nil {
log.Debug("rollBack", "error", errNotCritical.Error())
}
if isSyncWithErrorsLimitReachedInProperRound {
boot.forkDetector.ResetProbableHighestNonce()
boot.removeHeadersHigherThanNonceFromPool(boot.getNonceForCurrentBlock())
}
}
}
func (boot *baseBootstrap) incrementSyncedWithErrorsForNonce(nonce uint64) uint32 {
boot.mutNonceSyncedWithErrors.Lock()
boot.mapNonceSyncedWithErrors[nonce]++
numSyncedWithErrors := boot.mapNonceSyncedWithErrors[nonce]
boot.mutNonceSyncedWithErrors.Unlock()
return numSyncedWithErrors
}
// syncBlock method actually does the synchronization. It requests the next block header from the pool
// and if it is not found there it will be requested from the network. After the header is received,
// it requests the block body in the same way(pool and then, if it is not found in the pool, from network).
// If either header and body are received the ProcessBlock and CommitBlock method will be called successively.
// These methods will execute the block and its transactions. Finally if everything works, the block will be committed
// in the blockchain, and all this mechanism will be reiterated for the next block.
func (boot *baseBootstrap) syncBlock() error {
boot.computeNodeState()
nodeState := boot.GetNodeState()
if nodeState != common.NsNotSynchronized {
return nil
}
defer func() {
boot.mutNodeState.Lock()
boot.isNodeStateCalculated = false
boot.mutNodeState.Unlock()
}()
if boot.forkInfo.IsDetected {
boot.statusHandler.Increment(common.MetricNumTimesInForkChoice)
if boot.isForcedRollBackOneBlock() {
log.Debug("roll back one block has been forced")
boot.rollBackOneBlockForced()
return nil
}
if boot.isForcedRollBackToNonce() {
log.Debug("roll back to nonce has been forced", "nonce", boot.forkInfo.Nonce)
boot.rollBackToNonceForced()
return nil
}
log.Debug("fork detected",
"nonce", boot.forkInfo.Nonce,
"hash", boot.forkInfo.Hash,
)
err := boot.rollBack(true)
if err != nil {
return err
}
}
var body data.BodyHandler
var header data.HeaderHandler
var err error
defer func() {
if err != nil {
boot.doJobOnSyncBlockFail(body, header, err)
}
}()
header, err = boot.getNextHeaderRequestingIfMissing()
if err != nil {
return err
}
go boot.requestHeadersFromNonceIfMissing(header.GetNonce() + 1)
body, err = boot.blockBootstrapper.getBlockBodyRequestingIfMissing(header)
if err != nil {
return err
}
startTime := time.Now()
waitTime := boot.roundHandler.TimeDuration() * process.TimeDurationMultiplierForProcessBlockWhenSync
haveTime := func() time.Duration {
return waitTime - time.Since(startTime)
}
startProcessBlockTime := time.Now()
err = boot.blockProcessor.ProcessBlock(header, body, haveTime)
elapsedTime := time.Since(startProcessBlockTime)
log.Debug("elapsed time to process block",
"time [s]", elapsedTime,
)
if err != nil {
return err
}
startProcessScheduledBlockTime := time.Now()
err = boot.blockProcessor.ProcessScheduledBlock(header, body, haveTime)
elapsedTime = time.Since(startProcessScheduledBlockTime)
log.Debug("elapsed time to process scheduled block",
"time [s]", elapsedTime,
)
if err != nil {
return err
}
startCommitBlockTime := time.Now()
err = boot.blockProcessor.CommitBlock(header, body)
elapsedTime = time.Since(startCommitBlockTime)
if elapsedTime >= common.CommitMaxTime {
log.Warn("syncBlock.CommitBlock", "elapsed time", elapsedTime)
} else {
log.Debug("elapsed time to commit block",
"time [s]", elapsedTime,
)
}
if err != nil {
return err
}
log.Debug("block has been synced successfully",
"nonce", header.GetNonce(),
)
boot.cleanNoncesSyncedWithErrorsBehindFinal()
return nil
}
func (boot *baseBootstrap) syncUserAccountsState() error {
rootHash, err := boot.accounts.RootHash()
if err != nil {
return err
}
log.Warn("base sync: started syncUserAccountsState")
return boot.accountsDBSyncer.SyncAccounts(rootHash)
}
func (boot *baseBootstrap) cleanNoncesSyncedWithErrorsBehindFinal() {
boot.mutNonceSyncedWithErrors.Lock()
defer boot.mutNonceSyncedWithErrors.Unlock()
finalNonce := boot.forkDetector.GetHighestFinalBlockNonce()
for nonce := range boot.mapNonceSyncedWithErrors {
if nonce < finalNonce {
delete(boot.mapNonceSyncedWithErrors, nonce)
}
}
}
// rollBack decides if rollBackOneBlock must be called
func (boot *baseBootstrap) rollBack(revertUsingForkNonce bool) error {
if boot.headerStore == nil {
return process.ErrNilHeadersStorage
}
if boot.headerNonceHashStore == nil {
return process.ErrNilHeadersNonceHashStorage
}
var roleBackOneBlockExecuted bool
var err error
var currHeaderHash []byte
var currHeader data.HeaderHandler
var prevHeader data.HeaderHandler
var currBody data.BodyHandler
defer func() {
if !roleBackOneBlockExecuted {
err = boot.scheduledTxsExecutionHandler.RollBackToBlock(currHeaderHash)
if err != nil {
rootHash := boot.chainHandler.GetGenesisHeader().GetRootHash()
if currHeader != nil {
rootHash = currHeader.GetRootHash()
}
scheduledInfo := &process.ScheduledInfo{
RootHash: rootHash,
IntermediateTxs: make(map[block.Type][]data.TransactionHandler),
GasAndFees: process.GetZeroGasAndFees(),
MiniBlocks: make(block.MiniBlockSlice, 0),
}
boot.scheduledTxsExecutionHandler.SetScheduledInfo(scheduledInfo)
}
}
}()
log.Debug("starting roll back")
for {
currHeaderHash = boot.chainHandler.GetCurrentBlockHeaderHash()
currHeader, err = boot.blockBootstrapper.getCurrHeader()
if err != nil {
return err
}
allowRollBack := boot.shouldAllowRollback(currHeader)
if !revertUsingForkNonce && !allowRollBack {
return ErrRollBackBehindFinalHeader
}
shouldEndRollBack := revertUsingForkNonce && currHeader.GetNonce() < boot.forkInfo.Nonce
if shouldEndRollBack {
return ErrRollBackBehindForkNonce
}
prevHeaderHash := currHeader.GetPrevHash()
prevHeader, err = boot.blockBootstrapper.getPrevHeader(currHeader, boot.headerStore)
if err != nil {
return err
}
log.Debug("roll back to block",
"nonce", currHeader.GetNonce()-1,
"hash", currHeader.GetPrevHash(),
)
log.Debug("highest final block nonce",
"nonce", boot.forkDetector.GetHighestFinalBlockNonce(),
)
currBody, err = boot.rollBackOneBlock(
currHeaderHash,
currHeader,
prevHeaderHash,
prevHeader,
)
roleBackOneBlockExecuted = true
if err != nil {
return err
}
_, _ = updateMetricsFromStorage(boot.store, boot.uint64Converter, boot.marshalizer, boot.statusHandler, prevHeader.GetNonce())
err = boot.bootStorer.SaveLastRound(int64(prevHeader.GetRound()))
if err != nil {
log.Debug("save last round in storage",
"error", err.Error(),
"round", prevHeader.GetRound(),
)
}
err = boot.historyRepo.RevertBlock(currHeader, currBody)
if err != nil {
log.Debug("boot.historyRepo.RevertBlock",
"error", err.Error(),
)
return err
}
err = boot.scheduledTxsExecutionHandler.RollBackToBlock(prevHeaderHash)
if err != nil {
scheduledInfo := &process.ScheduledInfo{
RootHash: prevHeader.GetRootHash(),
IntermediateTxs: make(map[block.Type][]data.TransactionHandler),
GasAndFees: process.GetZeroGasAndFees(),
MiniBlocks: make(block.MiniBlockSlice, 0),
}
boot.scheduledTxsExecutionHandler.SetScheduledInfo(scheduledInfo)
}
boot.outportHandler.RevertIndexedBlock(currHeader, currBody)
shouldAddHeaderToBlackList := revertUsingForkNonce && boot.blockBootstrapper.isForkTriggeredByMeta()
if shouldAddHeaderToBlackList {
process.AddHeaderToBlackList(boot.blackListHandler, currHeaderHash)
}
shouldContinueRollBack := revertUsingForkNonce && currHeader.GetNonce() > boot.forkInfo.Nonce
if shouldContinueRollBack {
continue
}
break
}
log.Debug("ending roll back")
return nil
}
func (boot *baseBootstrap) shouldAllowRollback(currHeader data.HeaderHandler) bool {
finalBlockNonce := boot.forkDetector.GetHighestFinalBlockNonce()
isRollBackBehindFinal := currHeader.GetNonce() <= finalBlockNonce
isFinalBlockRollBack := currHeader.GetNonce() == finalBlockNonce
headerWithScheduledMiniBlocks := currHeader.HasScheduledMiniBlocks()
allowFinalBlockRollBack := headerWithScheduledMiniBlocks && isFinalBlockRollBack
allowRollBack := !isRollBackBehindFinal || allowFinalBlockRollBack
log.Debug("baseBootstrap.shouldAllowRollback",
"isRollBackBehindFinal", isRollBackBehindFinal,
"allowFinalBlockRollBack", allowFinalBlockRollBack,
"allowRollBack", allowRollBack,
)
return allowRollBack
}
func (boot *baseBootstrap) rollBackOneBlock(
currHeaderHash []byte,
currHeader data.HeaderHandler,
prevHeaderHash []byte,
prevHeader data.HeaderHandler,
) (data.BodyHandler, error) {
var err error
prevHeaderRootHash := boot.getRootHashFromBlock(prevHeader, prevHeaderHash)
currHeaderRootHash := boot.getRootHashFromBlock(currHeader, currHeaderHash)
defer func() {
if err != nil {
boot.restoreState(currHeaderHash, currHeader, currHeaderRootHash)
}
}()
if currHeader.GetNonce() > 1 {
err = boot.setCurrentBlockInfo(prevHeaderHash, prevHeader, prevHeaderRootHash)
if err != nil {
return nil, err
}
} else {
err = boot.setCurrentBlockInfo(nil, nil, nil)
if err != nil {
return nil, err
}
}
err = boot.blockProcessor.RevertStateToBlock(prevHeader, prevHeaderRootHash)
if err != nil {
return nil, err
}
boot.blockProcessor.PruneStateOnRollback(currHeader, currHeaderHash, prevHeader, prevHeaderHash)
currBlockBody, errNotCritical := boot.blockBootstrapper.getBlockBody(currHeader)
if errNotCritical != nil {
log.Debug("rollBackOneBlock getBlockBody error", "error", errNotCritical)
}
err = boot.blockProcessor.RestoreBlockIntoPools(currHeader, currBlockBody)
if err != nil {
return nil, err
}
boot.cleanCachesAndStorageOnRollback(currHeader)
return currBlockBody, nil
}
func (boot *baseBootstrap) getRootHashFromBlock(hdr data.HeaderHandler, hdrHash []byte) []byte {
hdrRootHash := hdr.GetRootHash()
scheduledHdrRootHash, err := boot.scheduledTxsExecutionHandler.GetScheduledRootHashForHeader(hdrHash)
if err == nil {
hdrRootHash = scheduledHdrRootHash
}
return hdrRootHash
}
func (boot *baseBootstrap) getNextHeaderRequestingIfMissing() (data.HeaderHandler, error) {
nonce := boot.getNonceForNextBlock()
boot.setRequestedHeaderHash(nil)
boot.setRequestedHeaderNonce(nil)
hash := boot.forkDetector.GetNotarizedHeaderHash(nonce)
if boot.forkInfo.IsDetected {
hash = boot.forkInfo.Hash
}
if hash != nil {
return boot.blockBootstrapper.getHeaderWithHashRequestingIfMissing(hash)
}
return boot.blockBootstrapper.getHeaderWithNonceRequestingIfMissing(nonce)
}
func (boot *baseBootstrap) isForcedRollBackOneBlock() bool {
return boot.forkInfo.IsDetected &&
boot.forkInfo.Nonce == math.MaxUint64 &&
boot.forkInfo.Hash == nil
}
func (boot *baseBootstrap) isForcedRollBackToNonce() bool {
return boot.forkInfo.IsDetected &&
boot.forkInfo.Round == math.MaxUint64 &&
boot.forkInfo.Hash == nil
}
func (boot *baseBootstrap) rollBackOneBlockForced() {
err := boot.rollBack(false)
if err != nil {
log.Debug("rollBackOneBlockForced", "error", err.Error())
}
boot.forkDetector.ResetFork()
boot.removeHeadersHigherThanNonceFromPool(boot.getNonceForCurrentBlock())
}
func (boot *baseBootstrap) rollBackToNonceForced() {
err := boot.rollBack(true)
if err != nil {
log.Debug("rollBackToNonceForced", "error", err.Error())
}
boot.forkDetector.ResetProbableHighestNonce()
boot.removeHeadersHigherThanNonceFromPool(boot.getNonceForCurrentBlock())
}
func (boot *baseBootstrap) restoreState(
currHeaderHash []byte,
currHeader data.HeaderHandler,
currRootHash []byte,
) {
log.Debug("revert state to header",
"nonce", currHeader.GetNonce(),
"hash", currHeaderHash,
"current root hash", currRootHash)
err := boot.chainHandler.SetCurrentBlockHeaderAndRootHash(currHeader, currRootHash)
if err != nil {
log.Debug("SetCurrentBlockHeader", "error", err.Error())
}
boot.chainHandler.SetCurrentBlockHeaderHash(currHeaderHash)
err = boot.scheduledTxsExecutionHandler.RollBackToBlock(currHeaderHash)
if err != nil {
scheduledInfo := &process.ScheduledInfo{
RootHash: currHeader.GetRootHash(),
IntermediateTxs: make(map[block.Type][]data.TransactionHandler),
GasAndFees: process.GetZeroGasAndFees(),
MiniBlocks: make(block.MiniBlockSlice, 0),
}
boot.scheduledTxsExecutionHandler.SetScheduledInfo(scheduledInfo)
}
err = boot.blockProcessor.RevertStateToBlock(currHeader, boot.scheduledTxsExecutionHandler.GetScheduledRootHash())
if err != nil {
log.Debug("RevertState", "error", err.Error())
}
}
func (boot *baseBootstrap) setCurrentBlockInfo(
headerHash []byte,
header data.HeaderHandler,
rootHash []byte,
) error {