func (cs *ConsensusState) stageBlock(block *types.Block, blockParts *types.PartSet) error {
if block == nil {
PanicSanity("Cannot stage nil block")
}
// Already staged?
blockHash := block.Hash()
if cs.stagedBlock != nil && len(blockHash) != 0 && bytes.Equal(cs.stagedBlock.Hash(), blockHash) {
return nil
}
// Create a copy of the state for staging
stateCopy := cs.state.Copy()
// reset the event cache and pass it into the state
cs.evc = events.NewEventCache(cs.evsw)
stateCopy.SetFireable(cs.evc)
// Commit block onto the copied state.
// NOTE: Basic validation is done in state.AppendBlock().
err := sm.ExecBlock(stateCopy, block, blockParts.Header())
if err != nil {
return err
} else {
cs.stagedBlock = block
cs.stagedState = stateCopy
return nil
}
}
// Handle messages from the poolReactor telling the reactor what to do.
func (bcR *BlockchainReactor) poolRoutine() {
trySyncTicker := time.NewTicker(trySyncIntervalMS * time.Millisecond)
statusUpdateTicker := time.NewTicker(statusUpdateIntervalSeconds * time.Second)
switchToConsensusTicker := time.NewTicker(switchToConsensusIntervalSeconds * time.Second)
FOR_LOOP:
for {
select {
case request := <-bcR.requestsCh: // chan BlockRequest
peer := bcR.sw.Peers().Get(request.PeerId)
if peer == nil {
// We can't fulfill the request.
continue FOR_LOOP
}
msg := &bcBlockRequestMessage{request.Height}
queued := peer.TrySend(BlockchainChannel, msg)
if !queued {
// We couldn't queue the request.
time.Sleep(defaultSleepIntervalMS * time.Millisecond)
continue FOR_LOOP
}
case peerId := <-bcR.timeoutsCh: // chan string
// Peer timed out.
peer := bcR.sw.Peers().Get(peerId)
if peer != nil {
bcR.sw.StopPeerForError(peer, errors.New("BlockchainReactor Timeout"))
}
case _ = <-statusUpdateTicker.C:
// ask for status updates
go bcR.BroadcastStatusRequest()
case _ = <-switchToConsensusTicker.C:
// not thread safe access for peerless and numPending but should be fine
log.Debug("Consensus ticker", "peerless", bcR.pool.peerless, "pending", bcR.pool.numPending, "total", bcR.pool.numTotal)
// NOTE: this condition is very strict right now. may need to weaken
// if the max amount of requests are pending and peerless
// and we have some peers (say > 5), then we're caught up
maxPending := bcR.pool.numPending == maxPendingRequests
maxPeerless := bcR.pool.peerless == bcR.pool.numPending
o, i, _ := bcR.sw.NumPeers()
enoughPeers := o+i >= 5
if maxPending && maxPeerless && enoughPeers {
log.Warn("Time to switch to consensus reactor!", "height", bcR.pool.height)
bcR.pool.Stop()
stateDB := dbm.GetDB("state")
state := sm.LoadState(stateDB)
bcR.sw.Reactor("CONSENSUS").(consensusReactor).ResetToState(state)
bcR.sw.Reactor("CONSENSUS").(consensusReactor).SetSyncing(false)
break FOR_LOOP
}
case _ = <-trySyncTicker.C: // chan time
//var lastValidatedBlock *types.Block
SYNC_LOOP:
for i := 0; i < 10; i++ {
// See if there are any blocks to sync.
first, second := bcR.pool.PeekTwoBlocks()
//log.Debug("TrySync peeked", "first", first, "second", second)
if first == nil || second == nil {
// We need both to sync the first block.
break SYNC_LOOP
}
firstParts := first.MakePartSet()
firstPartsHeader := firstParts.Header()
// Finally, verify the first block using the second's validation.
err := bcR.state.BondedValidators.VerifyValidation(
first.Hash(), firstPartsHeader, first.Height, second.Validation)
if err != nil {
log.Debug("error in validation", "error", err)
bcR.pool.RedoRequest(first.Height)
break SYNC_LOOP
} else {
bcR.pool.PopRequest()
err := sm.ExecBlock(bcR.state, first, firstPartsHeader)
if err != nil {
// TODO This is bad, are we zombie?
panic(Fmt("Failed to process committed block: %v", err))
}
bcR.store.SaveBlock(first, firstParts, second.Validation)
bcR.state.Save()
//lastValidatedBlock = first
}
}
/*
// We're done syncing for now (will do again shortly)
// See if we want to stop syncing and turn on the
// consensus reactor.
// TODO: use other heuristics too besides blocktime.
// It's not a security concern, as it only needs to happen
// upon node sync, and there's also a second (slower)
// this peer failed us
// method of syncing in the consensus reactor.
if lastValidatedBlock != nil && time.Now().Sub(lastValidatedBlock.Time) < stopSyncingDurationMinutes*time.Minute {
go func() {
log.Info("Stopping blockpool syncing, turning on consensus...")
trySyncTicker.Stop() // Just stop the block requests. Still serve blocks to others.
conR := bcR.sw.Reactor("CONSENSUS")
conR.(stateResetter).ResetToState(bcR.state)
conR.Start(bcR.sw)
for _, peer := range bcR.sw.Peers().List() {
conR.AddPeer(peer)
}
}()
break FOR_LOOP
}
*/
continue FOR_LOOP
case <-bcR.quit:
break FOR_LOOP
}
}
}
// Handle messages from the poolReactor telling the reactor what to do.
// NOTE: Don't sleep in the FOR_LOOP or otherwise slow it down!
// (Except for the SYNC_LOOP, which is the primary purpose and must be synchronous.)
func (bcR *BlockchainReactor) poolRoutine() {
trySyncTicker := time.NewTicker(trySyncIntervalMS * time.Millisecond)
statusUpdateTicker := time.NewTicker(statusUpdateIntervalSeconds * time.Second)
switchToConsensusTicker := time.NewTicker(switchToConsensusIntervalSeconds * time.Second)
FOR_LOOP:
for {
select {
case request := <-bcR.requestsCh: // chan BlockRequest
peer := bcR.Switch.Peers().Get(request.PeerID)
if peer == nil {
continue FOR_LOOP // Peer has since been disconnected.
}
msg := &bcBlockRequestMessage{request.Height}
queued := peer.TrySend(BlockchainChannel, msg)
if !queued {
// We couldn't make the request, send-queue full.
// The pool handles timeouts, just let it go.
continue FOR_LOOP
}
case peerID := <-bcR.timeoutsCh: // chan string
// Peer timed out.
peer := bcR.Switch.Peers().Get(peerID)
if peer != nil {
bcR.Switch.StopPeerForError(peer, errors.New("BlockchainReactor Timeout"))
}
case _ = <-statusUpdateTicker.C:
// ask for status updates
go bcR.BroadcastStatusRequest()
case _ = <-switchToConsensusTicker.C:
height, numPending := bcR.pool.GetStatus()
outbound, inbound, _ := bcR.Switch.NumPeers()
log.Info("Consensus ticker", "numPending", numPending, "total", len(bcR.pool.requesters),
"outbound", outbound, "inbound", inbound)
if bcR.pool.IsCaughtUp() {
log.Notice("Time to switch to consensus reactor!", "height", height)
bcR.pool.Stop()
conR := bcR.Switch.Reactor("CONSENSUS").(consensusReactor)
conR.SwitchToConsensus(bcR.state)
break FOR_LOOP
}
case _ = <-trySyncTicker.C: // chan time
// This loop can be slow as long as it's doing syncing work.
SYNC_LOOP:
for i := 0; i < 10; i++ {
// See if there are any blocks to sync.
first, second := bcR.pool.PeekTwoBlocks()
//log.Info("TrySync peeked", "first", first, "second", second)
if first == nil || second == nil {
// We need both to sync the first block.
break SYNC_LOOP
}
firstParts := first.MakePartSet()
firstPartsHeader := firstParts.Header()
// Finally, verify the first block using the second's validation.
err := bcR.state.BondedValidators.VerifyValidation(
bcR.state.ChainID, first.Hash(), firstPartsHeader, first.Height, second.LastValidation)
if err != nil {
log.Info("error in validation", "error", err)
bcR.pool.RedoRequest(first.Height)
break SYNC_LOOP
} else {
bcR.pool.PopRequest()
err := sm.ExecBlock(bcR.state, first, firstPartsHeader)
if err != nil {
// TODO This is bad, are we zombie?
PanicQ(Fmt("Failed to process committed block: %v", err))
}
bcR.store.SaveBlock(first, firstParts, second.LastValidation)
bcR.state.Save()
}
}
continue FOR_LOOP
case <-bcR.Quit:
break FOR_LOOP
}
}
}