Reactors can be stopped or started at any time.

blockchain/pool.go

@@ -149,7 +149,7 @@ func (bp *BlockPool) RedoRequest(height uint) {
 	if request.block == nil {
 		panic("Expected block to be non-nil")
 	}
-	bp.removePeer(request.peerId)
+	bp.RemovePeer(request.peerId) // Lock on peersMtx.
 	request.block = nil
 	request.peerId = ""
 	bp.numPending++

blockchain/reactor.go

@@ -0,0 +1,226 @@
+package blockchain
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"sync/atomic"
+	"time"
+
+	"github.com/tendermint/tendermint/binary"
+	"github.com/tendermint/tendermint/p2p"
+	"github.com/tendermint/tendermint/types"
+)
+
+const (
+	BlockchainChannel      = byte(0x40)
+	defaultChannelCapacity = 100
+	defaultSleepIntervalMS = 500
+)
+
+// BlockchainReactor handles long-term catchup syncing.
+type BlockchainReactor struct {
+	sw         *p2p.Switch
+	store      *BlockStore
+	pool       *BlockPool
+	requestsCh chan BlockRequest
+	timeoutsCh chan string
+	lastBlock  *types.Block
+	quit       chan struct{}
+	started    uint32
+	stopped    uint32
+}
+
+func NewBlockchainReactor(store *BlockStore) *BlockchainReactor {
+	requestsCh := make(chan BlockRequest, defaultChannelCapacity)
+	timeoutsCh := make(chan string, defaultChannelCapacity)
+	pool := NewBlockPool(
+		store.Height()+1,
+		requestsCh,
+		timeoutsCh,
+	)
+	bcR := &BlockchainReactor{
+		store:      store,
+		pool:       pool,
+		requestsCh: requestsCh,
+		timeoutsCh: timeoutsCh,
+		quit:       make(chan struct{}),
+		started:    0,
+		stopped:    0,
+	}
+	return bcR
+}
+
+// Implements Reactor
+func (bcR *BlockchainReactor) Start(sw *p2p.Switch) {
+	if atomic.CompareAndSwapUint32(&bcR.started, 0, 1) {
+		log.Info("Starting BlockchainReactor")
+		bcR.sw = sw
+		bcR.pool.Start()
+		go bcR.poolRoutine()
+	}
+}
+
+// Implements Reactor
+func (bcR *BlockchainReactor) Stop() {
+	if atomic.CompareAndSwapUint32(&bcR.stopped, 0, 1) {
+		log.Info("Stopping BlockchainReactor")
+		close(bcR.quit)
+		bcR.pool.Stop()
+	}
+}
+
+// Implements Reactor
+func (bcR *BlockchainReactor) GetChannels() []*p2p.ChannelDescriptor {
+	return []*p2p.ChannelDescriptor{
+		&p2p.ChannelDescriptor{
+			Id:                BlockchainChannel,
+			Priority:          5,
+			SendQueueCapacity: 20, // Queue 20 blocks to send to a peer.
+		},
+	}
+}
+
+// Implements Reactor
+func (bcR *BlockchainReactor) AddPeer(peer *p2p.Peer) {
+	// Send peer our state.
+	peer.Send(BlockchainChannel, PeerStatusMessage{bcR.store.Height()})
+}
+
+// Implements Reactor
+func (bcR *BlockchainReactor) RemovePeer(peer *p2p.Peer, reason interface{}) {
+	// Remove peer from the pool.
+	bcR.pool.RemovePeer(peer.Key)
+}
+
+// Implements Reactor
+func (bcR *BlockchainReactor) Receive(chId byte, src *p2p.Peer, msgBytes []byte) {
+	_, msg_, err := DecodeMessage(msgBytes)
+	if err != nil {
+		log.Warn("Error decoding message", "error", err)
+		return
+	}
+	log.Info("BlockchainReactor received message", "msg", msg_)
+
+	switch msg := msg_.(type) {
+	case BlockRequestMessage:
+		log.Debug("Got BlockRequest", "msg", msg)
+		// Got a request for a block. Respond with block if we have it.
+		block := bcR.store.LoadBlock(msg.Height)
+		if block != nil {
+			msg := BlockResponseMessage{Block: block}
+			queued := src.TrySend(BlockchainChannel, msg)
+			if !queued {
+				// queue is full, just ignore.
+			}
+		} else {
+			// TODO peer is asking for things we don't have.
+		}
+	case BlockResponseMessage:
+		log.Debug("Got BlockResponse", "msg", msg)
+		// Got a block.
+		bcR.pool.AddBlock(msg.Block, src.Key)
+	case PeerStatusMessage:
+		log.Debug("Got PeerStatus", "msg", msg)
+		// Got a peer status.
+		bcR.pool.SetPeerHeight(src.Key, msg.Height)
+	default:
+		// Ignore unknown message
+	}
+}
+
+func (bcR *BlockchainReactor) poolRoutine() {
+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 := BlockRequestMessage{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)
+			bcR.sw.StopPeerForError(peer, errors.New("BlockchainReactor Timeout"))
+		case <-bcR.quit:
+			break FOR_LOOP
+		}
+	}
+}
+
+func (bcR *BlockchainReactor) BroadcastStatus() error {
+	bcR.sw.Broadcast(BlockchainChannel, PeerStatusMessage{bcR.store.Height()})
+	return nil
+}
+
+//-----------------------------------------------------------------------------
+// Messages
+
+const (
+	msgTypeUnknown       = byte(0x00)
+	msgTypeBlockRequest  = byte(0x10)
+	msgTypeBlockResponse = byte(0x11)
+	msgTypePeerStatus    = byte(0x20)
+)
+
+// TODO: check for unnecessary extra bytes at the end.
+func DecodeMessage(bz []byte) (msgType byte, msg interface{}, err error) {
+	n := new(int64)
+	msgType = bz[0]
+	r := bytes.NewReader(bz)
+	switch msgType {
+	case msgTypeBlockRequest:
+		msg = binary.ReadBinary(BlockRequestMessage{}, r, n, &err)
+	case msgTypeBlockResponse:
+		msg = binary.ReadBinary(BlockResponseMessage{}, r, n, &err)
+	case msgTypePeerStatus:
+		msg = binary.ReadBinary(PeerStatusMessage{}, r, n, &err)
+	default:
+		msg = nil
+	}
+	return
+}
+
+//-------------------------------------
+
+type BlockRequestMessage struct {
+	Height uint
+}
+
+func (m BlockRequestMessage) TypeByte() byte { return msgTypeBlockRequest }
+
+func (m BlockRequestMessage) String() string {
+	return fmt.Sprintf("[BlockRequestMessage %v]", m.Height)
+}
+
+//-------------------------------------
+
+type BlockResponseMessage struct {
+	Block *types.Block
+}
+
+func (m BlockResponseMessage) TypeByte() byte { return msgTypeBlockResponse }
+
+func (m BlockResponseMessage) String() string {
+	return fmt.Sprintf("[BlockResponseMessage %v]", m.Block.Height)
+}
+
+//-------------------------------------
+
+type PeerStatusMessage struct {
+	Height uint
+}
+
+func (m PeerStatusMessage) TypeByte() byte { return msgTypePeerStatus }
+
+func (m PeerStatusMessage) String() string {
+	return fmt.Sprintf("[PeerStatusMessage %v]", m.Height)
+}

blockchain/store.go

@@ -57,7 +57,7 @@ func (bs *BlockStore) LoadBlock(height uint) *types.Block {
 	if r == nil {
 		panic(Fmt("Block does not exist at height %v", height))
 	}
-	meta := binary.ReadBinary(&BlockMeta{}, r, &n, &err).(*BlockMeta)
+	meta := binary.ReadBinary(&types.BlockMeta{}, r, &n, &err).(*types.BlockMeta)
 	if err != nil {
 		panic(Fmt("Error reading block meta: %v", err))
 	}
@@ -87,14 +87,14 @@ func (bs *BlockStore) LoadBlockPart(height uint, index uint) *types.Part {
 	return part
 }
 
-func (bs *BlockStore) LoadBlockMeta(height uint) *BlockMeta {
+func (bs *BlockStore) LoadBlockMeta(height uint) *types.BlockMeta {
 	var n int64
 	var err error
 	r := bs.GetReader(calcBlockMetaKey(height))
 	if r == nil {
 		panic(Fmt("BlockMeta does not exist for height %v", height))
 	}
-	meta := binary.ReadBinary(&BlockMeta{}, r, &n, &err).(*BlockMeta)
+	meta := binary.ReadBinary(&types.BlockMeta{}, r, &n, &err).(*types.BlockMeta)
 	if err != nil {
 		panic(Fmt("Error reading block meta: %v", err))
 	}
@@ -150,7 +150,7 @@ func (bs *BlockStore) SaveBlock(block *types.Block, blockParts *types.PartSet, s
 	}
 
 	// Save block meta
-	meta := makeBlockMeta(block, blockParts)
+	meta := types.NewBlockMeta(block, blockParts)
 	metaBytes := binary.BinaryBytes(meta)
 	bs.db.Set(calcBlockMetaKey(height), metaBytes)
 
@@ -184,22 +184,6 @@ func (bs *BlockStore) saveBlockPart(height uint, index uint, part *types.Part) {
 
 //-----------------------------------------------------------------------------
 
-type BlockMeta struct {
-	Hash   []byte              // The block hash
-	Header *types.Header       // The block's Header
-	Parts  types.PartSetHeader // The PartSetHeader, for transfer
-}
-
-func makeBlockMeta(block *types.Block, blockParts *types.PartSet) *BlockMeta {
-	return &BlockMeta{
-		Hash:   block.Hash(),
-		Header: block.Header,
-		Parts:  blockParts.Header(),
-	}
-}
-
-//-----------------------------------------------------------------------------
-
 func calcBlockMetaKey(height uint) []byte {
 	return []byte(fmt.Sprintf("H:%v", height))
 }

consensus/reactor.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/tendermint/tendermint/binary"
+	bc "github.com/tendermint/tendermint/blockchain"
 	. "github.com/tendermint/tendermint/common"
 	. "github.com/tendermint/tendermint/consensus/types"
 	"github.com/tendermint/tendermint/p2p"
@@ -34,11 +35,11 @@ type ConsensusReactor struct {
 	stopped uint32
 	quit    chan struct{}
 
-	blockStore *types.BlockStore
+	blockStore *bc.BlockStore
 	conS       *ConsensusState
 }
 
-func NewConsensusReactor(consensusState *ConsensusState, blockStore *types.BlockStore) *ConsensusReactor {
+func NewConsensusReactor(consensusState *ConsensusState, blockStore *bc.BlockStore) *ConsensusReactor {
 	conR := &ConsensusReactor{
 		blockStore: blockStore,
 		quit:       make(chan struct{}),

consensus/state.go

@@ -62,6 +62,7 @@ import (
 
 	"github.com/tendermint/tendermint/account"
 	"github.com/tendermint/tendermint/binary"
+	bc "github.com/tendermint/tendermint/blockchain"
 	. "github.com/tendermint/tendermint/common"
 	"github.com/tendermint/tendermint/config"
 	. "github.com/tendermint/tendermint/consensus/types"
@@ -234,7 +235,7 @@ type ConsensusState struct {
 	stopped uint32
 	quit    chan struct{}
 
-	blockStore     *types.BlockStore
+	blockStore     *bc.BlockStore
 	mempoolReactor *mempl.MempoolReactor
 	runActionCh    chan RoundAction
 	newStepCh      chan *RoundState
@@ -247,7 +248,7 @@ type ConsensusState struct {
 	lastCommitVoteHeight uint         // Last called commitVoteBlock() or saveCommitVoteBlock() on.
 }
 
-func NewConsensusState(state *sm.State, blockStore *types.BlockStore, mempoolReactor *mempl.MempoolReactor) *ConsensusState {
+func NewConsensusState(state *sm.State, blockStore *bc.BlockStore, mempoolReactor *mempl.MempoolReactor) *ConsensusState {
 	cs := &ConsensusState{
 		quit:           make(chan struct{}),
 		blockStore:     blockStore,

consensus/test.go

@@ -3,15 +3,15 @@ package consensus
 import (
 	"sort"
 
+	bc "github.com/tendermint/tendermint/blockchain"
 	dbm "github.com/tendermint/tendermint/db"
 	mempl "github.com/tendermint/tendermint/mempool"
 	sm "github.com/tendermint/tendermint/state"
-	"github.com/tendermint/tendermint/types"
 )
 
 func randConsensusState() (*ConsensusState, []*sm.PrivValidator) {
 	state, _, privValidators := sm.RandGenesisState(20, false, 1000, 10, false, 1000)
-	blockStore := types.NewBlockStore(dbm.NewMemDB())
+	blockStore := bc.NewBlockStore(dbm.NewMemDB())
 	mempool := mempl.NewMempool(state)
 	mempoolReactor := mempl.NewMempoolReactor(mempool)
 	cs := NewConsensusState(state, blockStore, mempoolReactor)

daemon/daemon.go

@@ -4,6 +4,7 @@ import (
 	"os"
 	"os/signal"
 
+	bc "github.com/tendermint/tendermint/blockchain"
 	. "github.com/tendermint/tendermint/common"
 	"github.com/tendermint/tendermint/config"
 	"github.com/tendermint/tendermint/consensus"
@@ -12,15 +13,15 @@ import (
 	"github.com/tendermint/tendermint/p2p"
 	"github.com/tendermint/tendermint/rpc"
 	sm "github.com/tendermint/tendermint/state"
-	"github.com/tendermint/tendermint/types"
 )
 
 type Node struct {
 	lz               []p2p.Listener
 	sw               *p2p.Switch
 	book             *p2p.AddrBook
+	blockStore       *bc.BlockStore
 	pexReactor       *p2p.PEXReactor
-	blockStore       *types.BlockStore
+	bcReactor        *bc.BlockchainReactor
 	mempoolReactor   *mempl.MempoolReactor
 	consensusState   *consensus.ConsensusState
 	consensusReactor *consensus.ConsensusReactor
@@ -30,7 +31,7 @@ type Node struct {
 func NewNode() *Node {
 	// Get BlockStore
 	blockStoreDB := dbm.GetDB("blockstore")
-	blockStore := types.NewBlockStore(blockStoreDB)
+	blockStore := bc.NewBlockStore(blockStoreDB)
 
 	// Get State
 	stateDB := dbm.GetDB("state")
@@ -53,6 +54,9 @@ func NewNode() *Node {
 	book := p2p.NewAddrBook(config.App().GetString("AddrBookFile"))
 	pexReactor := p2p.NewPEXReactor(book)
 
+	// Get BlockchainReactor
+	bcReactor := bc.NewBlockchainReactor(blockStore)
+
 	// Get MempoolReactor
 	mempool := mempl.NewMempool(state.Copy())
 	mempoolReactor := mempl.NewMempoolReactor(mempool)
@@ -64,14 +68,19 @@ func NewNode() *Node {
 		consensusReactor.SetPrivValidator(privValidator)
 	}
 
-	sw := p2p.NewSwitch([]p2p.Reactor{pexReactor, mempoolReactor, consensusReactor})
+	sw := p2p.NewSwitch()
 	sw.SetChainId(state.Hash(), config.App().GetString("Network"))
+	sw.AddReactor("PEX", pexReactor)
+	//sw.AddReactor("BLOCKCHAIN", bcReactor)
+	sw.AddReactor("MEMPOOL", mempoolReactor)
+	sw.AddReactor("CONSENSUS", consensusReactor)
 
 	return &Node{
 		sw:               sw,
 		book:             book,
-		pexReactor:       pexReactor,
 		blockStore:       blockStore,
+		pexReactor:       pexReactor,
+		bcReactor:        bcReactor,
 		mempoolReactor:   mempoolReactor,
 		consensusState:   consensusState,
 		consensusReactor: consensusReactor,
@@ -85,13 +94,13 @@ func (n *Node) Start() {
 		go n.inboundConnectionRoutine(l)
 	}
 	n.book.Start()
-	n.sw.Start()
+	n.sw.StartAll()
 }
 
 func (n *Node) Stop() {
 	log.Info("Stopping Node")
 	// TODO: gracefully disconnect from peers.
-	n.sw.Stop()
+	n.sw.StopAll()
 	n.book.Stop()
 }
 

p2p/connection.go

@@ -468,6 +468,7 @@ type Channel struct {
 }
 
 func newChannel(conn *MConnection, desc *ChannelDescriptor) *Channel {
+	desc.FillDefaults()
 	if desc.Priority <= 0 {
 		panic("Channel default priority must be a postive integer")
 	}

p2p/peer_set.go

@@ -7,6 +7,7 @@ import (
 // IPeerSet has a (immutable) subset of the methods of PeerSet.
 type IPeerSet interface {
 	Has(key string) bool
+	Get(key string) *Peer
 	List() []*Peer
 	Size() int
 }

p2p/switch.go

@@ -29,89 +29,100 @@ or more `Channels`.  So while sending outgoing messages is typically performed o
 incoming messages are received on the reactor.
 */
 type Switch struct {
-	reactors     []Reactor
+	chainId      string
+	reactors     map[string]Reactor
 	chDescs      []*ChannelDescriptor
 	reactorsByCh map[byte]Reactor
 	peers        *PeerSet
 	dialing      *CMap
-	listeners    *CMap // listenerName -> chan interface{}
-	quit         chan struct{}
-	started      uint32
-	stopped      uint32
-	chainId      string
+	listeners    *CMap  // listenerName -> chan interface{}
+	running      uint32 // atomic
 }
 
 var (
-	ErrSwitchStopped       = errors.New("Switch already stopped")
 	ErrSwitchDuplicatePeer = errors.New("Duplicate peer")
+	ErrSwitchStopped       = errors.New("Switch stopped")
 )
 
 const (
 	peerDialTimeoutSeconds = 3
 )
 
-func NewSwitch(reactors []Reactor) *Switch {
-
-	// Validate the reactors. no two reactors can share the same channel.
-	chDescs := []*ChannelDescriptor{}
-	reactorsByCh := make(map[byte]Reactor)
-	for _, reactor := range reactors {
-		reactorChannels := reactor.GetChannels()
-		for _, chDesc := range reactorChannels {
-			chId := chDesc.Id
-			if reactorsByCh[chId] != nil {
-				panic(fmt.Sprintf("Channel %X has multiple reactors %v & %v", chId, reactorsByCh[chId], reactor))
-			}
-			chDescs = append(chDescs, chDesc)
-			reactorsByCh[chId] = reactor
-		}
-	}
+func NewSwitch() *Switch {
 
 	sw := &Switch{
-		reactors:     reactors,
-		chDescs:      chDescs,
-		reactorsByCh: reactorsByCh,
+		chainId:      "",
+		reactors:     make(map[string]Reactor),
+		chDescs:      make([]*ChannelDescriptor, 0),
+		reactorsByCh: make(map[byte]Reactor),
 		peers:        NewPeerSet(),
 		dialing:      NewCMap(),
 		listeners:    NewCMap(),
-		quit:         make(chan struct{}),
-		stopped:      0,
+		running:      0,
 	}
 
 	return sw
 }
 
-func (sw *Switch) Start() {
-	if atomic.CompareAndSwapUint32(&sw.started, 0, 1) {
-		log.Info("Starting Switch")
-		for _, reactor := range sw.reactors {
-			reactor.Start(sw)
+func (sw *Switch) SetChainId(hash []byte, network string) {
+	sw.chainId = hex.EncodeToString(hash) + "-" + network
+}
+
+func (sw *Switch) AddReactor(name string, reactor Reactor) {
+	// Validate the reactor.
+	// No two reactors can share the same channel.
+	reactorChannels := reactor.GetChannels()
+	for _, chDesc := range reactorChannels {
+		chId := chDesc.Id
+		if sw.reactorsByCh[chId] != nil {
+			panic(fmt.Sprintf("Channel %X has multiple reactors %v & %v", chId, sw.reactorsByCh[chId], reactor))
 		}
+		sw.chDescs = append(sw.chDescs, chDesc)
+		sw.reactorsByCh[chId] = reactor
 	}
+	sw.reactors[name] = reactor
+	time.Sleep(1 * time.Second)
 }
 
-func (sw *Switch) Stop() {
-	if atomic.CompareAndSwapUint32(&sw.stopped, 0, 1) {
-		log.Info("Stopping Switch")
-		close(sw.quit)
-		// Stop each peer.
-		for _, peer := range sw.peers.List() {
-			peer.stop()
-		}
-		sw.peers = NewPeerSet()
-		// Stop all reactors.
-		for _, reactor := range sw.reactors {
-			reactor.Stop()
-		}
+func (sw *Switch) StartReactor(name string) {
+	atomic.StoreUint32(&sw.running, 1)
+	sw.reactors[name].Start(sw)
+}
+
+// Convenience function
+func (sw *Switch) StartAll() {
+	atomic.StoreUint32(&sw.running, 1)
+	for _, reactor := range sw.reactors {
+		reactor.Start(sw)
+	}
+}
+
+func (sw *Switch) StopReactor(name string) {
+	sw.reactors[name].Stop()
+}
+
+// Convenience function
+// Not goroutine safe
+func (sw *Switch) StopAll() {
+	atomic.StoreUint32(&sw.running, 0)
+	// Stop each peer.
+	for _, peer := range sw.peers.List() {
+		peer.stop()
+	}
+	sw.peers = NewPeerSet()
+	// Stop all reactors.
+	for _, reactor := range sw.reactors {
+		reactor.Stop()
 	}
 }
 
-func (sw *Switch) Reactors() []Reactor {
+// Not goroutine safe
+func (sw *Switch) Reactors() map[string]Reactor {
 	return sw.reactors
 }
 
 func (sw *Switch) AddPeerWithConnection(conn net.Conn, outbound bool) (*Peer, error) {
-	if atomic.LoadUint32(&sw.stopped) == 1 {
+	if atomic.LoadUint32(&sw.running) == 0 {
 		return nil, ErrSwitchStopped
 	}
 
@@ -125,12 +136,12 @@ func (sw *Switch) AddPeerWithConnection(conn net.Conn, outbound bool) (*Peer, er
 		return nil, ErrSwitchDuplicatePeer
 	}
 
-	// Start the peer
-	go peer.start()
-
 	// Notify listeners.
 	sw.doAddPeer(peer)
 
+	// Start the peer
+	go peer.start()
+
 	// Send handshake
 	msg := &pexHandshakeMessage{ChainId: sw.chainId}
 	peer.Send(PexChannel, msg)
@@ -139,7 +150,7 @@ func (sw *Switch) AddPeerWithConnection(conn net.Conn, outbound bool) (*Peer, er
 }
 
 func (sw *Switch) DialPeerWithAddress(addr *NetAddress) (*Peer, error) {
-	if atomic.LoadUint32(&sw.stopped) == 1 {
+	if atomic.LoadUint32(&sw.running) == 0 {
 		return nil, ErrSwitchStopped
 	}
 
@@ -168,7 +179,7 @@ func (sw *Switch) IsDialing(addr *NetAddress) bool {
 // trying to send for defaultSendTimeoutSeconds. Returns a channel
 // which receives success values for each attempted send (false if times out)
 func (sw *Switch) Broadcast(chId byte, msg interface{}) chan bool {
-	if atomic.LoadUint32(&sw.stopped) == 1 {
+	if atomic.LoadUint32(&sw.running) == 0 {
 		return nil
 	}
 	successChan := make(chan bool, len(sw.peers.List()))
@@ -223,16 +234,12 @@ func (sw *Switch) StopPeerGracefully(peer *Peer) {
 	sw.doRemovePeer(peer, nil)
 }
 
-func (sw *Switch) SetChainId(hash []byte, network string) {
-	sw.chainId = hex.EncodeToString(hash) + "-" + network
-}
-
 func (sw *Switch) IsListening() bool {
 	return sw.listeners.Size() > 0
 }
 
 func (sw *Switch) doAddPeer(peer *Peer) {
-	for _, reactor := range sw.reactors {
+	for name, reactor := range sw.reactors {
 		reactor.AddPeer(peer)
 	}
 }

rpc/rpc.go

@@ -1,18 +1,18 @@
 package rpc
 
 import (
+	bc "github.com/tendermint/tendermint/blockchain"
 	"github.com/tendermint/tendermint/consensus"
 	mempl "github.com/tendermint/tendermint/mempool"
 	"github.com/tendermint/tendermint/p2p"
-	"github.com/tendermint/tendermint/types"
 )
 
-var blockStore *types.BlockStore
+var blockStore *bc.BlockStore
 var consensusState *consensus.ConsensusState
 var mempoolReactor *mempl.MempoolReactor
 var p2pSwitch *p2p.Switch
 
-func SetRPCBlockStore(bs *types.BlockStore) {
+func SetRPCBlockStore(bs *bc.BlockStore) {
 	blockStore = bs
 }
 

state/state_test.go

@@ -2,7 +2,6 @@ package state
 
 import (
 	"github.com/tendermint/tendermint/account"
-	"github.com/tendermint/tendermint/binary"
 	"github.com/tendermint/tendermint/config"
 	"github.com/tendermint/tendermint/types"
 

types/block_meta.go

@@ -0,0 +1,15 @@
+package types
+
+type BlockMeta struct {
+	Hash   []byte        // The block hash
+	Header *Header       // The block's Header
+	Parts  PartSetHeader // The PartSetHeader, for transfer
+}
+
+func NewBlockMeta(block *Block, blockParts *PartSet) *BlockMeta {
+	return &BlockMeta{
+		Hash:   block.Hash(),
+		Header: block.Header,
+		Parts:  blockParts.Header(),
+	}
+}