You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
405 lines
12 KiB
405 lines
12 KiB
package blockchain
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
"time"
|
|
|
|
"github.com/tendermint/go-amino"
|
|
"github.com/tendermint/tendermint/p2p"
|
|
sm "github.com/tendermint/tendermint/state"
|
|
"github.com/tendermint/tendermint/types"
|
|
cmn "github.com/tendermint/tmlibs/common"
|
|
"github.com/tendermint/tmlibs/log"
|
|
)
|
|
|
|
const (
|
|
// BlockchainChannel is a channel for blocks and status updates (`BlockStore` height)
|
|
BlockchainChannel = byte(0x40)
|
|
|
|
trySyncIntervalMS = 50
|
|
// stop syncing when last block's time is
|
|
// within this much of the system time.
|
|
// stopSyncingDurationMinutes = 10
|
|
|
|
// ask for best height every 10s
|
|
statusUpdateIntervalSeconds = 10
|
|
// check if we should switch to consensus reactor
|
|
switchToConsensusIntervalSeconds = 1
|
|
|
|
// NOTE: keep up to date with bcBlockResponseMessage
|
|
bcBlockResponseMessagePrefixSize = 4
|
|
bcBlockResponseMessageFieldKeySize = 1
|
|
maxMsgSize = types.MaxBlockSizeBytes +
|
|
bcBlockResponseMessagePrefixSize +
|
|
bcBlockResponseMessageFieldKeySize
|
|
)
|
|
|
|
type consensusReactor interface {
|
|
// for when we switch from blockchain reactor and fast sync to
|
|
// the consensus machine
|
|
SwitchToConsensus(sm.State, int)
|
|
}
|
|
|
|
type peerError struct {
|
|
err error
|
|
peerID p2p.ID
|
|
}
|
|
|
|
func (e peerError) Error() string {
|
|
return fmt.Sprintf("error with peer %v: %s", e.peerID, e.err.Error())
|
|
}
|
|
|
|
// BlockchainReactor handles long-term catchup syncing.
|
|
type BlockchainReactor struct {
|
|
p2p.BaseReactor
|
|
|
|
// immutable
|
|
initialState sm.State
|
|
|
|
blockExec *sm.BlockExecutor
|
|
store *BlockStore
|
|
pool *BlockPool
|
|
fastSync bool
|
|
|
|
requestsCh <-chan BlockRequest
|
|
errorsCh <-chan peerError
|
|
}
|
|
|
|
// NewBlockchainReactor returns new reactor instance.
|
|
func NewBlockchainReactor(state sm.State, blockExec *sm.BlockExecutor, store *BlockStore,
|
|
fastSync bool) *BlockchainReactor {
|
|
|
|
if state.LastBlockHeight != store.Height() {
|
|
panic(fmt.Sprintf("state (%v) and store (%v) height mismatch", state.LastBlockHeight,
|
|
store.Height()))
|
|
}
|
|
|
|
const capacity = 1000 // must be bigger than peers count
|
|
requestsCh := make(chan BlockRequest, capacity)
|
|
errorsCh := make(chan peerError, capacity) // so we don't block in #Receive#pool.AddBlock
|
|
|
|
pool := NewBlockPool(
|
|
store.Height()+1,
|
|
requestsCh,
|
|
errorsCh,
|
|
)
|
|
|
|
bcR := &BlockchainReactor{
|
|
initialState: state,
|
|
blockExec: blockExec,
|
|
store: store,
|
|
pool: pool,
|
|
fastSync: fastSync,
|
|
requestsCh: requestsCh,
|
|
errorsCh: errorsCh,
|
|
}
|
|
bcR.BaseReactor = *p2p.NewBaseReactor("BlockchainReactor", bcR)
|
|
return bcR
|
|
}
|
|
|
|
// SetLogger implements cmn.Service by setting the logger on reactor and pool.
|
|
func (bcR *BlockchainReactor) SetLogger(l log.Logger) {
|
|
bcR.BaseService.Logger = l
|
|
bcR.pool.Logger = l
|
|
}
|
|
|
|
// OnStart implements cmn.Service.
|
|
func (bcR *BlockchainReactor) OnStart() error {
|
|
if err := bcR.BaseReactor.OnStart(); err != nil {
|
|
return err
|
|
}
|
|
if bcR.fastSync {
|
|
err := bcR.pool.Start()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
go bcR.poolRoutine()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// OnStop implements cmn.Service.
|
|
func (bcR *BlockchainReactor) OnStop() {
|
|
bcR.BaseReactor.OnStop()
|
|
bcR.pool.Stop()
|
|
}
|
|
|
|
// GetChannels implements Reactor
|
|
func (bcR *BlockchainReactor) GetChannels() []*p2p.ChannelDescriptor {
|
|
return []*p2p.ChannelDescriptor{
|
|
{
|
|
ID: BlockchainChannel,
|
|
Priority: 10,
|
|
SendQueueCapacity: 1000,
|
|
RecvBufferCapacity: 50 * 4096,
|
|
RecvMessageCapacity: maxMsgSize,
|
|
},
|
|
}
|
|
}
|
|
|
|
// AddPeer implements Reactor by sending our state to peer.
|
|
func (bcR *BlockchainReactor) AddPeer(peer p2p.Peer) {
|
|
msgBytes := cdc.MustMarshalBinaryBare(&bcStatusResponseMessage{bcR.store.Height()})
|
|
if !peer.Send(BlockchainChannel, msgBytes) {
|
|
// doing nothing, will try later in `poolRoutine`
|
|
}
|
|
// peer is added to the pool once we receive the first
|
|
// bcStatusResponseMessage from the peer and call pool.SetPeerHeight
|
|
}
|
|
|
|
// RemovePeer implements Reactor by removing peer from the pool.
|
|
func (bcR *BlockchainReactor) RemovePeer(peer p2p.Peer, reason interface{}) {
|
|
bcR.pool.RemovePeer(peer.ID())
|
|
}
|
|
|
|
// respondToPeer loads a block and sends it to the requesting peer,
|
|
// if we have it. Otherwise, we'll respond saying we don't have it.
|
|
// According to the Tendermint spec, if all nodes are honest,
|
|
// no node should be requesting for a block that's non-existent.
|
|
func (bcR *BlockchainReactor) respondToPeer(msg *bcBlockRequestMessage,
|
|
src p2p.Peer) (queued bool) {
|
|
|
|
block := bcR.store.LoadBlock(msg.Height)
|
|
if block != nil {
|
|
msgBytes := cdc.MustMarshalBinaryBare(&bcBlockResponseMessage{Block: block})
|
|
return src.TrySend(BlockchainChannel, msgBytes)
|
|
}
|
|
|
|
bcR.Logger.Info("Peer asking for a block we don't have", "src", src, "height", msg.Height)
|
|
|
|
msgBytes := cdc.MustMarshalBinaryBare(&bcNoBlockResponseMessage{Height: msg.Height})
|
|
return src.TrySend(BlockchainChannel, msgBytes)
|
|
}
|
|
|
|
// Receive implements Reactor by handling 4 types of messages (look below).
|
|
func (bcR *BlockchainReactor) Receive(chID byte, src p2p.Peer, msgBytes []byte) {
|
|
msg, err := DecodeMessage(msgBytes)
|
|
if err != nil {
|
|
bcR.Logger.Error("Error decoding message", "src", src, "chId", chID, "msg", msg, "err", err, "bytes", msgBytes)
|
|
bcR.Switch.StopPeerForError(src, err)
|
|
return
|
|
}
|
|
|
|
bcR.Logger.Debug("Receive", "src", src, "chID", chID, "msg", msg)
|
|
|
|
switch msg := msg.(type) {
|
|
case *bcBlockRequestMessage:
|
|
if queued := bcR.respondToPeer(msg, src); !queued {
|
|
// Unfortunately not queued since the queue is full.
|
|
}
|
|
case *bcBlockResponseMessage:
|
|
// Got a block.
|
|
bcR.pool.AddBlock(src.ID(), msg.Block, len(msgBytes))
|
|
case *bcStatusRequestMessage:
|
|
// Send peer our state.
|
|
msgBytes := cdc.MustMarshalBinaryBare(&bcStatusResponseMessage{bcR.store.Height()})
|
|
queued := src.TrySend(BlockchainChannel, msgBytes)
|
|
if !queued {
|
|
// sorry
|
|
}
|
|
case *bcStatusResponseMessage:
|
|
// Got a peer status. Unverified.
|
|
bcR.pool.SetPeerHeight(src.ID(), msg.Height)
|
|
default:
|
|
bcR.Logger.Error(cmn.Fmt("Unknown message type %v", reflect.TypeOf(msg)))
|
|
}
|
|
}
|
|
|
|
// 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)
|
|
|
|
blocksSynced := 0
|
|
|
|
chainID := bcR.initialState.ChainID
|
|
state := bcR.initialState
|
|
|
|
lastHundred := time.Now()
|
|
lastRate := 0.0
|
|
|
|
FOR_LOOP:
|
|
for {
|
|
select {
|
|
case request := <-bcR.requestsCh:
|
|
peer := bcR.Switch.Peers().Get(request.PeerID)
|
|
if peer == nil {
|
|
continue FOR_LOOP // Peer has since been disconnected.
|
|
}
|
|
msgBytes := cdc.MustMarshalBinaryBare(&bcBlockRequestMessage{request.Height})
|
|
queued := peer.TrySend(BlockchainChannel, msgBytes)
|
|
if !queued {
|
|
// We couldn't make the request, send-queue full.
|
|
// The pool handles timeouts, just let it go.
|
|
continue FOR_LOOP
|
|
}
|
|
case err := <-bcR.errorsCh:
|
|
peer := bcR.Switch.Peers().Get(err.peerID)
|
|
if peer != nil {
|
|
bcR.Switch.StopPeerForError(peer, err)
|
|
}
|
|
case <-statusUpdateTicker.C:
|
|
// ask for status updates
|
|
go bcR.BroadcastStatusRequest() // nolint: errcheck
|
|
case <-switchToConsensusTicker.C:
|
|
height, numPending, lenRequesters := bcR.pool.GetStatus()
|
|
outbound, inbound, _ := bcR.Switch.NumPeers()
|
|
bcR.Logger.Debug("Consensus ticker", "numPending", numPending, "total", lenRequesters,
|
|
"outbound", outbound, "inbound", inbound)
|
|
if bcR.pool.IsCaughtUp() {
|
|
bcR.Logger.Info("Time to switch to consensus reactor!", "height", height)
|
|
bcR.pool.Stop()
|
|
|
|
conR := bcR.Switch.Reactor("CONSENSUS").(consensusReactor)
|
|
conR.SwitchToConsensus(state, blocksSynced)
|
|
|
|
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()
|
|
//bcR.Logger.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(state.ConsensusParams.BlockPartSizeBytes)
|
|
firstPartsHeader := firstParts.Header()
|
|
firstID := types.BlockID{first.Hash(), firstPartsHeader}
|
|
// Finally, verify the first block using the second's commit
|
|
// NOTE: we can probably make this more efficient, but note that calling
|
|
// first.Hash() doesn't verify the tx contents, so MakePartSet() is
|
|
// currently necessary.
|
|
err := state.Validators.VerifyCommit(
|
|
chainID, firstID, first.Height, second.LastCommit)
|
|
if err != nil {
|
|
bcR.Logger.Error("Error in validation", "err", err)
|
|
peerID := bcR.pool.RedoRequest(first.Height)
|
|
peer := bcR.Switch.Peers().Get(peerID)
|
|
if peer != nil {
|
|
bcR.Switch.StopPeerForError(peer, fmt.Errorf("BlockchainReactor validation error: %v", err))
|
|
}
|
|
break SYNC_LOOP
|
|
} else {
|
|
bcR.pool.PopRequest()
|
|
|
|
// TODO: batch saves so we dont persist to disk every block
|
|
bcR.store.SaveBlock(first, firstParts, second.LastCommit)
|
|
|
|
// TODO: same thing for app - but we would need a way to
|
|
// get the hash without persisting the state
|
|
var err error
|
|
state, err = bcR.blockExec.ApplyBlock(state, firstID, first)
|
|
if err != nil {
|
|
// TODO This is bad, are we zombie?
|
|
cmn.PanicQ(cmn.Fmt("Failed to process committed block (%d:%X): %v",
|
|
first.Height, first.Hash(), err))
|
|
}
|
|
blocksSynced++
|
|
|
|
if blocksSynced%100 == 0 {
|
|
lastRate = 0.9*lastRate + 0.1*(100/time.Since(lastHundred).Seconds())
|
|
bcR.Logger.Info("Fast Sync Rate", "height", bcR.pool.height,
|
|
"max_peer_height", bcR.pool.MaxPeerHeight(), "blocks/s", lastRate)
|
|
lastHundred = time.Now()
|
|
}
|
|
}
|
|
}
|
|
continue FOR_LOOP
|
|
case <-bcR.Quit():
|
|
break FOR_LOOP
|
|
}
|
|
}
|
|
}
|
|
|
|
// BroadcastStatusRequest broadcasts `BlockStore` height.
|
|
func (bcR *BlockchainReactor) BroadcastStatusRequest() error {
|
|
msgBytes := cdc.MustMarshalBinaryBare(&bcStatusRequestMessage{bcR.store.Height()})
|
|
bcR.Switch.Broadcast(BlockchainChannel, msgBytes)
|
|
return nil
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Messages
|
|
|
|
// BlockchainMessage is a generic message for this reactor.
|
|
type BlockchainMessage interface{}
|
|
|
|
func RegisterBlockchainMessages(cdc *amino.Codec) {
|
|
cdc.RegisterInterface((*BlockchainMessage)(nil), nil)
|
|
cdc.RegisterConcrete(&bcBlockRequestMessage{}, "tendermint/mempool/BlockRequest", nil)
|
|
cdc.RegisterConcrete(&bcBlockResponseMessage{}, "tendermint/mempool/BlockResponse", nil)
|
|
cdc.RegisterConcrete(&bcNoBlockResponseMessage{}, "tendermint/mempool/NoBlockResponse", nil)
|
|
cdc.RegisterConcrete(&bcStatusResponseMessage{}, "tendermint/mempool/StatusResponse", nil)
|
|
cdc.RegisterConcrete(&bcStatusRequestMessage{}, "tendermint/mempool/StatusRequest", nil)
|
|
}
|
|
|
|
// DecodeMessage decodes BlockchainMessage.
|
|
// TODO: ensure that bz is completely read.
|
|
func DecodeMessage(bz []byte) (msg BlockchainMessage, err error) {
|
|
if len(bz) > maxMsgSize {
|
|
return msg, fmt.Errorf("Msg exceeds max size (%d > %d)",
|
|
len(bz), maxMsgSize)
|
|
}
|
|
err = cdc.UnmarshalBinaryBare(bz, &msg)
|
|
if err != nil {
|
|
err = cmn.ErrorWrap(err, "DecodeMessage() had bytes left over")
|
|
}
|
|
return
|
|
}
|
|
|
|
//-------------------------------------
|
|
|
|
type bcBlockRequestMessage struct {
|
|
Height int64
|
|
}
|
|
|
|
func (m *bcBlockRequestMessage) String() string {
|
|
return cmn.Fmt("[bcBlockRequestMessage %v]", m.Height)
|
|
}
|
|
|
|
type bcNoBlockResponseMessage struct {
|
|
Height int64
|
|
}
|
|
|
|
func (brm *bcNoBlockResponseMessage) String() string {
|
|
return cmn.Fmt("[bcNoBlockResponseMessage %d]", brm.Height)
|
|
}
|
|
|
|
//-------------------------------------
|
|
|
|
type bcBlockResponseMessage struct {
|
|
Block *types.Block
|
|
}
|
|
|
|
func (m *bcBlockResponseMessage) String() string {
|
|
return cmn.Fmt("[bcBlockResponseMessage %v]", m.Block.Height)
|
|
}
|
|
|
|
//-------------------------------------
|
|
|
|
type bcStatusRequestMessage struct {
|
|
Height int64
|
|
}
|
|
|
|
func (m *bcStatusRequestMessage) String() string {
|
|
return cmn.Fmt("[bcStatusRequestMessage %v]", m.Height)
|
|
}
|
|
|
|
//-------------------------------------
|
|
|
|
type bcStatusResponseMessage struct {
|
|
Height int64
|
|
}
|
|
|
|
func (m *bcStatusResponseMessage) String() string {
|
|
return cmn.Fmt("[bcStatusResponseMessage %v]", m.Height)
|
|
}
|