abci++: Propagate vote extensions (RFC 017) (#8433)

* Add protos for ExtendedCommit Cherry-pick from e73f0178b72a16ee81f8e856aadf651f2c62ec6e just the changes to the .proto files, since we have deleted the .intermediate files. Signed-off-by: Thane Thomson <connect@thanethomson.com> * make proto-gen Signed-off-by: Thane Thomson <connect@thanethomson.com> * BlockStore holds extended commit Cherry-pick 8d504d4b50ec6afbdffe2df7ababbef30e15053d and fix conflicts. Signed-off-by: Thane Thomson <connect@thanethomson.com> * Reshuffle ExtendedCommit and ExtendedCommitSig Separate the data structures and functions from their Commit-oriented counterparts to adhere to the current coding style. Signed-off-by: Thane Thomson <connect@thanethomson.com> * Fix exit condition in blocksync * Add note to remove TxResult proto As Sergio pointed out in 3e31aa6f583cdc71e208ed03a82f1d804ec0de49, this proto message can probably be removed. We should do this in a separate PR. Signed-off-by: Thane Thomson <connect@thanethomson.com> * Lift termination condition into for loop Signed-off-by: Thane Thomson <connect@thanethomson.com> * Enforce vote extension signature requirement Signed-off-by: Thane Thomson <connect@thanethomson.com> * Expand on comment for PeekTwoBlocks for posterity Signed-off-by: Thane Thomson <connect@thanethomson.com> * Isolate TODO more clearly Signed-off-by: Thane Thomson <connect@thanethomson.com> * make mockery Signed-off-by: Thane Thomson <connect@thanethomson.com> * Fix comment Signed-off-by: Thane Thomson <connect@thanethomson.com> * Make panic output from BlockStore.SaveBlock more readable Signed-off-by: Thane Thomson <connect@thanethomson.com> * Add helper methods to ExtendedCommitSig and ExtendedCommit Signed-off-by: Thane Thomson <connect@thanethomson.com> * Fix most tests except TestHandshake* Signed-off-by: Thane Thomson <connect@thanethomson.com> * Fix store prefix collision Signed-off-by: Thane Thomson <connect@thanethomson.com> * Fix TestBlockFetchAtHeight Signed-off-by: Thane Thomson <connect@thanethomson.com> * Remove global state from store tests Signed-off-by: Thane Thomson <connect@thanethomson.com> * Apply suggestions from code review Co-authored-by: M. J. Fromberger <fromberger@interchain.io> Co-authored-by: Sergio Mena <sergio@informal.systems> * blocksync: Just return error Signed-off-by: Thane Thomson <connect@thanethomson.com> * make format Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Remove unused/commented-out code Signed-off-by: Thane Thomson <connect@thanethomson.com> * blocksync: Change pool AddBlock function signature to return errors Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Improve legibility of switch statements Signed-off-by: Thane Thomson <connect@thanethomson.com> * blocksync: Expand on extended commit requirement in AddBlock description Signed-off-by: Thane Thomson <connect@thanethomson.com> * blocksync: Return error without also logging it Signed-off-by: Thane Thomson <connect@thanethomson.com> * consensus: Rename short-lived local variable Signed-off-by: Thane Thomson <connect@thanethomson.com> * consensus: Allocate TODO to Sergio Signed-off-by: Thane Thomson <connect@thanethomson.com> * evidence/pool_test: Inline slice construction Signed-off-by: Thane Thomson <connect@thanethomson.com> * state: Rename LoadBlockExtCommit to LoadBlockExtendedCommit Signed-off-by: Thane Thomson <connect@thanethomson.com> * proto: Remove TODO on TxResult Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Minor format Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Reformat ExtendedCommitSig.BlockID Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Remove NewExtendedCommit constructor Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Remove NewCommit constructor Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Shorten receiver names for ExtendedCommit Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Convert ExtendedCommit.Copy to a deep clone Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Assign TODO to Sergio Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Fix legibility nits Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Improve legibility Signed-off-by: Thane Thomson <connect@thanethomson.com> * store/state: Add TODO to move prefixes to common package Signed-off-by: Thane Thomson <connect@thanethomson.com> * Propagate validator info to PrepareProposal In order to propagate validator voting power through to PrepareProposal, we need to load the validator set info from the height corresponding to the extended commit that we're passing through to PrepareProposal as the "LocalLastCommit". Signed-off-by: Thane Thomson <connect@thanethomson.com> * Rename local var for clarity Signed-off-by: Thane Thomson <connect@thanethomson.com> * Fix TestMaxProposalBlockSize Signed-off-by: Thane Thomson <connect@thanethomson.com> * Rename local var for clarity Signed-off-by: Thane Thomson <connect@thanethomson.com> * Remove debug log Signed-off-by: Thane Thomson <connect@thanethomson.com> * Remove CommigSig.ForBlock helper Signed-off-by: Thane Thomson <connect@thanethomson.com> * Remove CommigSig.Absent helper Signed-off-by: Thane Thomson <connect@thanethomson.com> * Remove ExtendedCommitSig.ForBlock helper Signed-off-by: Thane Thomson <connect@thanethomson.com> * Remove ExtendedCommitSig.Absent helper Signed-off-by: Thane Thomson <connect@thanethomson.com> * There are no extended commits below the initial height Signed-off-by: Thane Thomson <connect@thanethomson.com> * Fix comment grammar Signed-off-by: Thane Thomson <connect@thanethomson.com> * Remove JSON encoding from ExtendedCommit Signed-off-by: Thane Thomson <connect@thanethomson.com> * Embed CommitSig into ExtendedCommitSig instead of duplicating fields Signed-off-by: Thane Thomson <connect@thanethomson.com> * Rename ExtendedCommit vote_extension field to extension for consistency with domain types Signed-off-by: Thane Thomson <connect@thanethomson.com> * blocksync: Panic if we peek a block without an extended commit Signed-off-by: Thane Thomson <connect@thanethomson.com> * Apply suggestions from code review Co-authored-by: M. J. Fromberger <fromberger@interchain.io> * Remove Sergio from TODO Signed-off-by: Thane Thomson <connect@thanethomson.com> * Increase hard-coded vote extension max size to 1MB Signed-off-by: Thane Thomson <connect@thanethomson.com> * state: Remove unnecessary comment Signed-off-by: Thane Thomson <connect@thanethomson.com> * state: Ensure no of commit sigs equals validator set length Signed-off-by: Thane Thomson <connect@thanethomson.com> * make format Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Minor legibility improvements Signed-off-by: Thane Thomson <connect@thanethomson.com> * Improve legibility Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Remove unused GetVotes function on VoteSet Signed-off-by: Thane Thomson <connect@thanethomson.com> * Refactor TestMaxProposalBlockSize to construct more realistic extended commit Signed-off-by: Thane Thomson <connect@thanethomson.com> * Refactor buildExtendedCommitInfo to resemble buildLastCommitInfo Signed-off-by: Thane Thomson <connect@thanethomson.com> * Apply suggestions from code review Co-authored-by: M. J. Fromberger <fromberger@interchain.io> * abci++: Disable VerifyVoteExtension call on nil precommits (#8491) Signed-off-by: Thane Thomson <connect@thanethomson.com> * types: Require vote extensions on non-nil precommits and not otherwise Signed-off-by: Thane Thomson <connect@thanethomson.com> * Disable lint Signed-off-by: Thane Thomson <connect@thanethomson.com> * Increase timeout for TestReactorVotingPowerChange to counter flakiness Signed-off-by: Thane Thomson <connect@thanethomson.com> * Only sign and verify vote extensions in non-nil precommits Signed-off-by: Thane Thomson <connect@thanethomson.com> * Revert "Disable lint" This reverts commit 6fffbf9402. Signed-off-by: Thane Thomson <connect@thanethomson.com> * Add missing non-nil check uncovered non-deterministically in TestHandshakeReplayAll Signed-off-by: Thane Thomson <connect@thanethomson.com> * Expand error message for accuracy Signed-off-by: Thane Thomson <connect@thanethomson.com> * Only call ExtendVote when we make non-nil precommits Signed-off-by: Thane Thomson <connect@thanethomson.com> * Revert "Increase timeout for TestReactorVotingPowerChange to counter flakiness" This reverts commit af514939db. Signed-off-by: Thane Thomson <connect@thanethomson.com> * Refactor ValidateBasic for ExtendedCommitSig for legibility Signed-off-by: Thane Thomson <connect@thanethomson.com> Co-authored-by: Sergio Mena <sergio@informal.systems> Co-authored-by: M. J. Fromberger <fromberger@interchain.io>
2026-09-18 22:14:35 +00:00 · 2022-05-11 07:10:32 -04:00
parent 735a1a537b
commit 06b1812094
53 changed files with 1928 additions and 692 deletions
@@ -200,16 +200,20 @@ func (pool *BlockPool) IsCaughtUp() bool {
 	return pool.height >= (pool.maxPeerHeight - 1)
 }

-// PeekTwoBlocks returns blocks at pool.height and pool.height+1.
-// We need to see the second block's Commit to validate the first block.
-// So we peek two blocks at a time.
+// PeekTwoBlocks returns blocks at pool.height and pool.height+1. We need to
+// see the second block's Commit to validate the first block. So we peek two
+// blocks at a time. We return an extended commit, containing vote extensions
+// and their associated signatures, as this is critical to consensus in ABCI++
+// as we switch from block sync to consensus mode.
+//
 // The caller will verify the commit.
-func (pool *BlockPool) PeekTwoBlocks() (first *types.Block, second *types.Block) {
+func (pool *BlockPool) PeekTwoBlocks() (first, second *types.Block, firstExtCommit *types.ExtendedCommit) {
 	pool.mtx.RLock()
 	defer pool.mtx.RUnlock()

 	if r := pool.requesters[pool.height]; r != nil {
 		first = r.getBlock()
+		firstExtCommit = r.getExtendedCommit()
 	}
 	if r := pool.requesters[pool.height+1]; r != nil {
 		second = r.getBlock()
@@ -218,7 +222,8 @@ func (pool *BlockPool) PeekTwoBlocks() (first *types.Block, second *types.Block)
 }

 // PopRequest pops the first block at pool.height.
-// It must have been validated by 'second'.Commit from PeekTwoBlocks().
+// It must have been validated by the second Commit from PeekTwoBlocks.
+// TODO(thane): (?) and its corresponding ExtendedCommit.
 func (pool *BlockPool) PopRequest() {
 	pool.mtx.Lock()
 	defer pool.mtx.Unlock()
@@ -262,16 +267,25 @@ func (pool *BlockPool) RedoRequest(height int64) types.NodeID {
 	return peerID
 }

-// AddBlock validates that the block comes from the peer it was expected from and calls the requester to store it.
+// AddBlock validates that the block comes from the peer it was expected from
+// and calls the requester to store it.
+//
+// This requires an extended commit at the same height as the supplied block -
+// the block contains the last commit, but we need the latest commit in case we
+// need to switch over from block sync to consensus at this height. If the
+// height of the extended commit and the height of the block do not match, we
+// do not add the block and return an error.
 // TODO: ensure that blocks come in order for each peer.
-func (pool *BlockPool) AddBlock(peerID types.NodeID, block *types.Block, blockSize int) {
+func (pool *BlockPool) AddBlock(peerID types.NodeID, block *types.Block, extCommit *types.ExtendedCommit, blockSize int) error {
 	pool.mtx.Lock()
 	defer pool.mtx.Unlock()

+	if block.Height != extCommit.Height {
+		return fmt.Errorf("heights don't match, not adding block (block height: %d, commit height: %d)", block.Height, extCommit.Height)
+	}
+
 	requester := pool.requesters[block.Height]
 	if requester == nil {
-		pool.logger.Error("peer sent us a block we didn't expect",
-			"peer", peerID, "curHeight", pool.height, "blockHeight", block.Height)
 		diff := pool.height - block.Height
 		if diff < 0 {
 			diff *= -1
@@ -279,10 +293,10 @@ func (pool *BlockPool) AddBlock(peerID types.NodeID, block *types.Block, blockSi
 		if diff > maxDiffBetweenCurrentAndReceivedBlockHeight {
 			pool.sendError(errors.New("peer sent us a block we didn't expect with a height too far ahead/behind"), peerID)
 		}
-		return
+		return fmt.Errorf("peer sent us a block we didn't expect (peer: %s, current height: %d, block height: %d)", peerID, pool.height, block.Height)
 	}

-	if requester.setBlock(block, peerID) {
+	if requester.setBlock(block, extCommit, peerID) {
 		atomic.AddInt32(&pool.numPending, -1)
 		peer := pool.peers[peerID]
 		if peer != nil {
@@ -290,9 +304,11 @@ func (pool *BlockPool) AddBlock(peerID types.NodeID, block *types.Block, blockSi
 		}
 	} else {
 		err := errors.New("requester is different or block already exists")
-		pool.logger.Error(err.Error(), "peer", peerID, "requester", requester.getPeerID(), "blockHeight", block.Height)
 		pool.sendError(err, peerID)
+		return fmt.Errorf("%w (peer: %s, requester: %s, block height: %d)", err, peerID, requester.getPeerID(), block.Height)
 	}
+
+	return nil
 }

 // MaxPeerHeight returns the highest reported height.
@@ -456,6 +472,7 @@ func (pool *BlockPool) debug() string {
 		} else {
 			str += fmt.Sprintf("H(%v):", h)
 			str += fmt.Sprintf("B?(%v) ", pool.requesters[h].block != nil)
+			str += fmt.Sprintf("C?(%v) ", pool.requesters[h].extCommit != nil)
 		}
 	}
 	return str
@@ -544,9 +561,10 @@ type bpRequester struct {
 	gotBlockCh chan struct{}
 	redoCh     chan types.NodeID // redo may send multitime, add peerId to identify repeat

-	mtx    sync.Mutex
-	peerID types.NodeID
-	block  *types.Block
+	mtx       sync.Mutex
+	peerID    types.NodeID
+	block     *types.Block
+	extCommit *types.ExtendedCommit
 }

 func newBPRequester(logger log.Logger, pool *BlockPool, height int64) *bpRequester {
@@ -572,13 +590,14 @@ func (bpr *bpRequester) OnStart(ctx context.Context) error {
 func (*bpRequester) OnStop() {}

 // Returns true if the peer matches and block doesn't already exist.
-func (bpr *bpRequester) setBlock(block *types.Block, peerID types.NodeID) bool {
+func (bpr *bpRequester) setBlock(block *types.Block, extCommit *types.ExtendedCommit, peerID types.NodeID) bool {
 	bpr.mtx.Lock()
 	if bpr.block != nil || bpr.peerID != peerID {
 		bpr.mtx.Unlock()
 		return false
 	}
 	bpr.block = block
+	bpr.extCommit = extCommit
 	bpr.mtx.Unlock()

 	select {
@@ -594,6 +613,12 @@ func (bpr *bpRequester) getBlock() *types.Block {
 	return bpr.block
 }

+func (bpr *bpRequester) getExtendedCommit() *types.ExtendedCommit {
+	bpr.mtx.Lock()
+	defer bpr.mtx.Unlock()
+	return bpr.extCommit
+}
+
 func (bpr *bpRequester) getPeerID() types.NodeID {
 	bpr.mtx.Lock()
 	defer bpr.mtx.Unlock()
@@ -611,6 +636,7 @@ func (bpr *bpRequester) reset() {

 	bpr.peerID = ""
 	bpr.block = nil
+	bpr.extCommit = nil
 }

 // Tells bpRequester to pick another peer and try again.
@@ -43,7 +43,10 @@ func (p testPeer) runInputRoutine() {
 // Request desired, pretend like we got the block immediately.
 func (p testPeer) simulateInput(input inputData) {
 	block := &types.Block{Header: types.Header{Height: input.request.Height}}
-	input.pool.AddBlock(input.request.PeerID, block, 123)
+	extCommit := &types.ExtendedCommit{
+		Height: input.request.Height,
+	}
+	_ = input.pool.AddBlock(input.request.PeerID, block, extCommit, 123)
 	// TODO: uncommenting this creates a race which is detected by:
 	// https://github.com/golang/go/blob/2bd767b1022dd3254bcec469f0ee164024726486/src/testing/testing.go#L854-L856
 	// see: https://github.com/tendermint/tendermint/issues/3390#issue-418379890
@@ -110,7 +113,7 @@ func TestBlockPoolBasic(t *testing.T) {
 			if !pool.IsRunning() {
 				return
 			}
-			first, second := pool.PeekTwoBlocks()
+			first, second, _ := pool.PeekTwoBlocks()
 			if first != nil && second != nil {
 				pool.PopRequest()
 			} else {
@@ -164,7 +167,7 @@ func TestBlockPoolTimeout(t *testing.T) {
 			if !pool.IsRunning() {
 				return
 			}
-			first, second := pool.PeekTwoBlocks()
+			first, second, _ := pool.PeekTwoBlocks()
 			if first != nil && second != nil {
 				pool.PopRequest()
 			} else {
@@ -76,7 +76,7 @@ type Reactor struct {
 	stateStore sm.Store

 	blockExec   *sm.BlockExecutor
-	store       *store.BlockStore
+	store       sm.BlockStore
 	pool        *BlockPool
 	consReactor consensusReactor
 	blockSync   *atomicBool
@@ -186,15 +186,21 @@ func (r *Reactor) OnStop() {
 func (r *Reactor) respondToPeer(ctx context.Context, msg *bcproto.BlockRequest, peerID types.NodeID, blockSyncCh *p2p.Channel) error {
 	block := r.store.LoadBlock(msg.Height)
 	if block != nil {
+		extCommit := r.store.LoadBlockExtendedCommit(msg.Height)
+		if extCommit == nil {
+			return fmt.Errorf("found block in store without extended commit: %v", block)
+		}
 		blockProto, err := block.ToProto()
 		if err != nil {
-			r.logger.Error("failed to convert msg to protobuf", "err", err)
-			return err
+			return fmt.Errorf("failed to convert block to protobuf: %w", err)
 		}

 		return blockSyncCh.Send(ctx, p2p.Envelope{
-			To:      peerID,
-			Message: &bcproto.BlockResponse{Block: blockProto},
+			To: peerID,
+			Message: &bcproto.BlockResponse{
+				Block:     blockProto,
+				ExtCommit: extCommit.ToProto(),
+			},
 		})
 	}

@@ -236,8 +242,17 @@ func (r *Reactor) handleMessage(ctx context.Context, envelope *p2p.Envelope, blo
 					"err", err)
 				return err
 			}
+			extCommit, err := types.ExtendedCommitFromProto(msg.ExtCommit)
+			if err != nil {
+				r.logger.Error("failed to convert extended commit from proto",
+					"peer", envelope.From,
+					"err", err)
+				return err
+			}

-			r.pool.AddBlock(envelope.From, block, block.Size())
+			if err := r.pool.AddBlock(envelope.From, block, extCommit, block.Size()); err != nil {
+				r.logger.Error("failed to add block", "err", err)
+			}

 		case *bcproto.StatusRequest:
 			return blockSyncCh.Send(ctx, p2p.Envelope{
@@ -448,6 +463,20 @@ func (r *Reactor) poolRoutine(ctx context.Context, stateSynced bool, blockSyncCh
 			)

 			switch {
+			// TODO(sergio) Might be needed for implementing the upgrading solution. Remove after that
+			//case state.LastBlockHeight > 0 && r.store.LoadBlockExtCommit(state.LastBlockHeight) == nil:
+			case state.LastBlockHeight > 0 && blocksSynced == 0:
+				// Having state-synced, we need to blocksync at least one block
+				r.logger.Info(
+					"no seen commit yet",
+					"height", height,
+					"last_block_height", state.LastBlockHeight,
+					"initial_height", state.InitialHeight,
+					"max_peer_height", r.pool.MaxPeerHeight(),
+					"timeout_in", syncTimeout-time.Since(lastAdvance),
+				)
+				continue
+
 			case r.pool.IsCaughtUp():
 				r.logger.Info("switching to consensus reactor", "height", height)

@@ -490,9 +519,13 @@ func (r *Reactor) poolRoutine(ctx context.Context, stateSynced bool, blockSyncCh
 			// TODO: Uncouple from request routine.

 			// see if there are any blocks to sync
-			first, second := r.pool.PeekTwoBlocks()
-			if first == nil || second == nil {
-				// we need both to sync the first block
+			first, second, extCommit := r.pool.PeekTwoBlocks()
+			if first == nil || second == nil || extCommit == nil {
+				if first != nil && extCommit == nil {
+					// See https://github.com/tendermint/tendermint/pull/8433#discussion_r866790631
+					panic(fmt.Errorf("peeked first block without extended commit at height %d - possible node store corruption", first.Height))
+				}
+				// we need all to sync the first block
 				continue
 			} else {
 				// try again quickly next loop
@@ -517,6 +550,7 @@ func (r *Reactor) poolRoutine(ctx context.Context, stateSynced bool, blockSyncCh
 			// 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.
+			// TODO(sergio): Should we also validate against the extended commit?
 			err = state.Validators.VerifyCommitLight(chainID, firstID, first.Height, second.LastCommit)

 			if err == nil {
@@ -559,7 +593,7 @@ func (r *Reactor) poolRoutine(ctx context.Context, stateSynced bool, blockSyncCh
 			r.pool.PopRequest()

 			// TODO: batch saves so we do not persist to disk every block
-			r.store.SaveBlock(first, firstParts, second.LastCommit)
+			r.store.SaveBlock(first, firstParts, extCommit)

 			// TODO: Same thing for app - but we would need a way to get the hash
 			// without persisting the state.
@@ -147,39 +147,43 @@ func (rts *reactorTestSuite) addNode(
 		sm.NopMetrics(),
 	)

+	var lastExtCommit *types.ExtendedCommit
+
+	// The commit we are building for the current height.
+	seenExtCommit := &types.ExtendedCommit{}
+
 	for blockHeight := int64(1); blockHeight <= maxBlockHeight; blockHeight++ {
-		lastCommit := types.NewCommit(blockHeight-1, 0, types.BlockID{}, nil)
+		lastExtCommit = seenExtCommit.Clone()

-		if blockHeight > 1 {
-			lastBlockMeta := blockStore.LoadBlockMeta(blockHeight - 1)
-			lastBlock := blockStore.LoadBlock(blockHeight - 1)
-
-			vote, err := factory.MakeVote(
-				ctx,
-				privVal,
-				lastBlock.Header.ChainID, 0,
-				lastBlock.Header.Height, 0, 2,
-				lastBlockMeta.BlockID,
-				time.Now(),
-			)
-			require.NoError(t, err)
-			lastCommit = types.NewCommit(
-				vote.Height,
-				vote.Round,
-				lastBlockMeta.BlockID,
-				[]types.CommitSig{vote.CommitSig()},
-			)
-		}
-
-		thisBlock := sf.MakeBlock(state, blockHeight, lastCommit)
+		thisBlock := sf.MakeBlock(state, blockHeight, lastExtCommit.StripExtensions())
 		thisParts, err := thisBlock.MakePartSet(types.BlockPartSizeBytes)
 		require.NoError(t, err)
 		blockID := types.BlockID{Hash: thisBlock.Hash(), PartSetHeader: thisParts.Header()}

+		// Simulate a commit for the current height
+		vote, err := factory.MakeVote(
+			ctx,
+			privVal,
+			thisBlock.Header.ChainID,
+			0,
+			thisBlock.Header.Height,
+			0,
+			2,
+			blockID,
+			time.Now(),
+		)
+		require.NoError(t, err)
+		seenExtCommit = &types.ExtendedCommit{
+			Height:             vote.Height,
+			Round:              vote.Round,
+			BlockID:            blockID,
+			ExtendedSignatures: []types.ExtendedCommitSig{vote.ExtendedCommitSig()},
+		}
+
 		state, err = blockExec.ApplyBlock(ctx, state, blockID, thisBlock)
 		require.NoError(t, err)

-		blockStore.SaveBlock(thisBlock, thisParts, lastCommit)
+		blockStore.SaveBlock(thisBlock, thisParts, seenExtCommit)
 	}

 	rts.peerChans[nodeID] = make(chan p2p.PeerUpdate)