diff --git a/chain/blocksync/blocksync.go b/chain/blocksync/blocksync.go
index f26ffeb02..ccb7a5498 100644
--- a/chain/blocksync/blocksync.go
+++ b/chain/blocksync/blocksync.go
@@ -138,7 +138,7 @@ func (bss *BlockSyncService) processRequest(ctx context.Context, p peer.ID, req
 		reqlen = BlockSyncMaxRequestLength
 	}
 
-	chain, err := bss.collectChainSegment(types.NewTipSetKey(req.Start...), reqlen, opts)
+	chain, err := collectChainSegment(bss.cs, types.NewTipSetKey(req.Start...), reqlen, opts)
 	if err != nil {
 		log.Warn("encountered error while responding to block sync request: ", err)
 		return &BlockSyncResponse{
@@ -158,18 +158,18 @@ func (bss *BlockSyncService) processRequest(ctx context.Context, p peer.ID, req
 	}, nil
 }
 
-func (bss *BlockSyncService) collectChainSegment(start types.TipSetKey, length uint64, opts *BSOptions) ([]*BSTipSet, error) {
+func collectChainSegment(cs *store.ChainStore, start types.TipSetKey, length uint64, opts *BSOptions) ([]*BSTipSet, error) {
 	var bstips []*BSTipSet
 	cur := start
 	for {
 		var bst BSTipSet
-		ts, err := bss.cs.LoadTipSet(cur)
+		ts, err := cs.LoadTipSet(cur)
 		if err != nil {
 			return nil, xerrors.Errorf("failed loading tipset %s: %w", cur, err)
 		}
 
 		if opts.IncludeMessages {
-			bmsgs, bmincl, smsgs, smincl, err := bss.gatherMessages(ts)
+			bmsgs, bmincl, smsgs, smincl, err := gatherMessages(cs, ts)
 			if err != nil {
 				return nil, xerrors.Errorf("gather messages failed: %w", err)
 			}
@@ -194,7 +194,7 @@ func (bss *BlockSyncService) collectChainSegment(start types.TipSetKey, length u
 	}
 }
 
-func (bss *BlockSyncService) gatherMessages(ts *types.TipSet) ([]*types.Message, [][]uint64, []*types.SignedMessage, [][]uint64, error) {
+func gatherMessages(cs *store.ChainStore, ts *types.TipSet) ([]*types.Message, [][]uint64, []*types.SignedMessage, [][]uint64, error) {
 	blsmsgmap := make(map[cid.Cid]uint64)
 	secpkmsgmap := make(map[cid.Cid]uint64)
 	var secpkmsgs []*types.SignedMessage
@@ -202,7 +202,7 @@ func (bss *BlockSyncService) gatherMessages(ts *types.TipSet) ([]*types.Message,
 	var secpkincl, blsincl [][]uint64
 
 	for _, b := range ts.Blocks() {
-		bmsgs, smsgs, err := bss.cs.MessagesForBlock(b)
+		bmsgs, smsgs, err := cs.MessagesForBlock(b)
 		if err != nil {
 			return nil, nil, nil, nil, err
 		}
diff --git a/chain/blocksync/blocksync_client.go b/chain/blocksync/blocksync_client.go
index 69cd5ec7c..9ff85657a 100644
--- a/chain/blocksync/blocksync_client.go
+++ b/chain/blocksync/blocksync_client.go
@@ -12,6 +12,8 @@ import (
 	blocks "github.com/ipfs/go-block-format"
 	bserv "github.com/ipfs/go-blockservice"
 	"github.com/ipfs/go-cid"
+	graphsync "github.com/ipfs/go-graphsync"
+	gsnet "github.com/ipfs/go-graphsync/network"
 	host "github.com/libp2p/go-libp2p-core/host"
 	inet "github.com/libp2p/go-libp2p-core/network"
 	"github.com/libp2p/go-libp2p-core/peer"
@@ -28,18 +30,20 @@ import (
 
 type BlockSync struct {
 	bserv bserv.BlockService
+	gsync graphsync.GraphExchange
 	host  host.Host
 
 	syncPeers *bsPeerTracker
 	peerMgr   *peermgr.PeerMgr
 }
 
-func NewBlockSyncClient(bserv dtypes.ChainBlockService, h host.Host, pmgr peermgr.MaybePeerMgr) *BlockSync {
+func NewBlockSyncClient(bserv dtypes.ChainBlockService, h host.Host, pmgr peermgr.MaybePeerMgr, gs dtypes.Graphsync) *BlockSync {
 	return &BlockSync{
 		bserv:     bserv,
 		host:      h,
 		syncPeers: newPeerTracker(pmgr.Mgr),
 		peerMgr:   pmgr.Mgr,
+		gsync:     gs,
 	}
 }
 
@@ -234,14 +238,45 @@ func (bs *BlockSync) sendRequestToPeer(ctx context.Context, p peer.ID, req *Bloc
 		}
 	}()
 
-	start := time.Now()
-
 	if span.IsRecordingEvents() {
 		span.AddAttributes(
 			trace.StringAttribute("peer", p.Pretty()),
 		)
 	}
 
+	gsproto := string(gsnet.ProtocolGraphsync)
+	supp, err := bs.host.Peerstore().SupportsProtocols(p /*, BlockSyncProtocolID, */, gsproto)
+	if err != nil {
+		return nil, xerrors.Errorf("failed to get protocols for peer: %w", err)
+	}
+
+	if len(supp) == 0 {
+		return nil, xerrors.Errorf("peer %s supports no known sync protocols", p)
+	}
+
+	switch supp[0] {
+	case BlockSyncProtocolID:
+		res, err := bs.fetchBlocksBlockSync(ctx, p, req)
+		if err != nil {
+			return nil, xerrors.Errorf("blocksync req failed: %w", err)
+		}
+		return res, nil
+	case gsproto:
+		res, err := bs.fetchBlocksGraphSync(ctx, p, req)
+		if err != nil {
+			return nil, xerrors.Errorf("graphsync req failed: %w", err)
+		}
+		return res, nil
+	default:
+		return nil, xerrors.Errorf("peerstore somehow returned unexpected protocols: %v", supp)
+	}
+
+}
+func (bs *BlockSync) fetchBlocksBlockSync(ctx context.Context, p peer.ID, req *BlockSyncRequest) (*BlockSyncResponse, error) {
+	ctx, span := trace.StartSpan(ctx, "blockSyncFetch")
+	defer span.End()
+
+	start := time.Now()
 	s, err := bs.host.NewStream(inet.WithNoDial(ctx, "should already have connection"), p, BlockSyncProtocolID)
 	if err != nil {
 		bs.RemovePeer(p)
@@ -272,7 +307,6 @@ func (bs *BlockSync) sendRequestToPeer(ctx context.Context, p peer.ID, req *Bloc
 	}
 
 	bs.syncPeers.logSuccess(p, time.Since(start))
-
 	return &res, nil
 }
 
diff --git a/chain/blocksync/graphsync_client.go b/chain/blocksync/graphsync_client.go
new file mode 100644
index 000000000..33f91fdd7
--- /dev/null
+++ b/chain/blocksync/graphsync_client.go
@@ -0,0 +1,168 @@
+package blocksync
+
+import (
+	"context"
+
+	"github.com/ipfs/go-cid"
+	"github.com/ipfs/go-datastore"
+	"github.com/ipld/go-ipld-prime"
+	"github.com/libp2p/go-libp2p-core/peer"
+	"golang.org/x/xerrors"
+
+	store "github.com/filecoin-project/lotus/chain/store"
+	"github.com/filecoin-project/lotus/chain/types"
+
+	ipldfree "github.com/ipld/go-ipld-prime/impl/free"
+	cidlink "github.com/ipld/go-ipld-prime/linking/cid"
+	ipldselector "github.com/ipld/go-ipld-prime/traversal/selector"
+	selectorbuilder "github.com/ipld/go-ipld-prime/traversal/selector/builder"
+)
+
+const (
+	// could be anything? <100 though I think is the base limit
+	recursionDepth = 50
+
+	// AMT selector recursion. An AMT has arity of 8 so this gives allows
+	// us to retrieve trees with 8^10 (1,073,741,824) elements.
+	amtRecursionDepth = uint32(10)
+
+	// some constants for looking up tuple encoded struct fields
+	// field index of Parents field in a block header
+	blockIndexParentsField = 3
+
+	// field index of Messages field in a block header
+	blockIndexMessagesField = 8
+
+	// field index of AMT node in AMT head
+	amtHeadNodeFieldIndex = 2
+
+	// field index of links array AMT node
+	amtNodeLinksFieldIndex = 1
+
+	// field index of values array AMT node
+	amtNodeValuesFieldIndex = 2
+)
+
+var blockHeadersSelector, fullSelector ipld.Node
+
+var amtSelector selectorbuilder.SelectorSpec
+
+func init() {
+	// builer for selectors
+	ssb := selectorbuilder.NewSelectorSpecBuilder(ipldfree.NodeBuilder())
+	// blockHeaders only selector
+	blockHeadersSelector = ssb.ExploreRecursive(ipldselector.RecursionLimitDepth(recursionDepth), ssb.ExploreIndex(blockIndexParentsField,
+		ssb.ExploreUnion(
+			ssb.ExploreAll(
+				ssb.Matcher(),
+			),
+			ssb.ExploreIndex(0, ssb.ExploreRecursiveEdge()),
+		))).Node()
+	// amt selector -- needed to selector through a messages AMT
+	amtSelector = ssb.ExploreIndex(amtHeadNodeFieldIndex,
+		ssb.ExploreRecursive(ipldselector.RecursionLimitDepth(int(amtRecursionDepth)),
+			ssb.ExploreUnion(
+				ssb.ExploreIndex(amtNodeLinksFieldIndex,
+					ssb.ExploreAll(ssb.ExploreRecursiveEdge())),
+				ssb.ExploreIndex(amtNodeValuesFieldIndex,
+					ssb.ExploreAll(ssb.Matcher())))))
+	// messages too selector
+	fullSelector = ssb.ExploreRecursive(ipldselector.RecursionLimitDepth(recursionDepth),
+		ssb.ExploreIndex(blockIndexParentsField,
+			ssb.ExploreUnion(
+				ssb.ExploreAll(
+					ssb.ExploreIndex(blockIndexMessagesField,
+						ssb.ExploreRange(0, 2, amtSelector),
+					)),
+				ssb.ExploreIndex(0, ssb.ExploreRecursiveEdge()),
+			))).Node()
+}
+
+func selectorForRequest(req *BlockSyncRequest) ipld.Node {
+	// builer for selectors
+	ssb := selectorbuilder.NewSelectorSpecBuilder(ipldfree.NodeBuilder())
+
+	bso := ParseBSOptions(req.Options)
+	if bso.IncludeMessages {
+		return ssb.ExploreRecursive(ipldselector.RecursionLimitDepth(int(req.RequestLength)),
+			ssb.ExploreIndex(blockIndexParentsField,
+				ssb.ExploreUnion(
+					ssb.ExploreAll(
+						ssb.ExploreIndex(blockIndexMessagesField,
+							ssb.ExploreRange(0, 2, amtSelector),
+						)),
+					ssb.ExploreIndex(0, ssb.ExploreRecursiveEdge()),
+				))).Node()
+	} else {
+		return ssb.ExploreRecursive(ipldselector.RecursionLimitDepth(int(req.RequestLength)), ssb.ExploreIndex(blockIndexParentsField,
+			ssb.ExploreUnion(
+				ssb.ExploreAll(
+					ssb.Matcher(),
+				),
+				ssb.ExploreIndex(0, ssb.ExploreRecursiveEdge()),
+			))).Node()
+	}
+
+}
+
+func (bs *BlockSync) executeGsyncSelector(ctx context.Context, p peer.ID, root cid.Cid, sel ipld.Node) error {
+	resp, errs := bs.gsync.Request(ctx, p, cidlink.Link{Cid: root}, sel)
+
+	for {
+		select {
+		case _, ok := <-resp:
+			if !ok {
+				return nil
+			}
+		case err, ok := <-errs:
+			if !ok {
+				return nil
+			}
+			return xerrors.Errorf("failed to complete graphsync request: %w", err)
+		}
+	}
+
+}
+
+// Fallback for interacting with other non-lotus nodes
+func (bs *BlockSync) fetchBlocksGraphSync(ctx context.Context, p peer.ID, req *BlockSyncRequest) (*BlockSyncResponse, error) {
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	sel := selectorForRequest(req)
+
+	// TODO:
+	for _, c := range req.Start {
+		if _, err := bs.bserv.GetBlock(ctx, c); err != nil {
+			return nil, xerrors.Errorf("failed to fetch blocks: %w")
+		}
+	}
+
+	req2 := *req
+	req2.RequestLength = 1
+	immediateTsSelector := selectorForRequest(&req2)
+
+	// Do this because we can only request one root at a time
+	for _, r := range req.Start {
+		if err := bs.executeGsyncSelector(ctx, p, r, immediateTsSelector); err != nil {
+			return nil, err
+		}
+	}
+
+	// execute the selector forreal
+	if err := bs.executeGsyncSelector(ctx, p, req.Start[0], sel); err != nil {
+		return nil, err
+	}
+
+	// Now pull the data we fetched out of the chainstore (where it should now be persisted)
+	tempcs := store.NewChainStore(bs.bserv.Blockstore(), datastore.NewMapDatastore(), nil)
+
+	opts := ParseBSOptions(req.Options)
+	tsk := types.NewTipSetKey(req.Start...)
+	chain, err := collectChainSegment(tempcs, tsk, req.RequestLength, opts)
+	if err != nil {
+		return nil, xerrors.Errorf("failed to load chain data from chainstore after successful graphsync response (start = %v): %w", req.Start, err)
+	}
+
+	return &BlockSyncResponse{Chain: chain}, nil
+}
diff --git a/go.mod b/go.mod
index b15a48922..39123fd9b 100644
--- a/go.mod
+++ b/go.mod
@@ -10,6 +10,7 @@ require (
 	github.com/Gurpartap/async v0.0.0-20180927173644-4f7f499dd9ee
 	github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d // indirect
 	github.com/coreos/go-systemd/v22 v22.0.0
+	github.com/davidlazar/go-crypto v0.0.0-20190912175916-7055855a373f // indirect
 	github.com/docker/go-units v0.4.0
 	github.com/filecoin-project/chain-validation v0.0.6-0.20200320210432-2793319e9867
 	github.com/filecoin-project/filecoin-ffi v0.0.0-20200304181354-4446ff8a1bb9
@@ -40,7 +41,7 @@ require (
 	github.com/ipfs/go-blockservice v0.1.3-0.20190908200855-f22eea50656c
 	github.com/ipfs/go-car v0.0.3-0.20200304012825-b6769248bfef
 	github.com/ipfs/go-cid v0.0.5
-	github.com/ipfs/go-datastore v0.4.2
+	github.com/ipfs/go-datastore v0.4.4
 	github.com/ipfs/go-ds-badger2 v0.0.0-20200211201106-609c9d2a39c7
 	github.com/ipfs/go-filestore v0.0.2
 	github.com/ipfs/go-fs-lock v0.0.1
@@ -61,16 +62,19 @@ require (
 	github.com/ipfs/go-path v0.0.7
 	github.com/ipfs/go-unixfs v0.2.2-0.20190827150610-868af2e9e5cb
 	github.com/ipld/go-ipld-prime v0.0.2-0.20191108012745-28a82f04c785
+	github.com/jackpal/go-nat-pmp v1.0.2 // indirect
+	github.com/jbenet/go-temp-err-catcher v0.1.0 // indirect
 	github.com/lib/pq v1.2.0
-	github.com/libp2p/go-libp2p v0.5.2
+	github.com/libp2p/go-eventbus v0.1.0
+	github.com/libp2p/go-libp2p v0.6.0
 	github.com/libp2p/go-libp2p-circuit v0.1.4
 	github.com/libp2p/go-libp2p-connmgr v0.1.0
-	github.com/libp2p/go-libp2p-core v0.3.0
+	github.com/libp2p/go-libp2p-core v0.5.0
 	github.com/libp2p/go-libp2p-discovery v0.2.0
 	github.com/libp2p/go-libp2p-kad-dht v0.1.1
-	github.com/libp2p/go-libp2p-mplex v0.2.1
+	github.com/libp2p/go-libp2p-mplex v0.2.2
 	github.com/libp2p/go-libp2p-peer v0.2.0
-	github.com/libp2p/go-libp2p-peerstore v0.1.4
+	github.com/libp2p/go-libp2p-peerstore v0.2.0
 	github.com/libp2p/go-libp2p-pubsub v0.2.6
 	github.com/libp2p/go-libp2p-quic-transport v0.1.1
 	github.com/libp2p/go-libp2p-record v0.1.1
@@ -78,15 +82,15 @@ require (
 	github.com/libp2p/go-libp2p-secio v0.2.1
 	github.com/libp2p/go-libp2p-swarm v0.2.2
 	github.com/libp2p/go-libp2p-tls v0.1.0
-	github.com/libp2p/go-libp2p-yamux v0.2.1
+	github.com/libp2p/go-libp2p-yamux v0.2.5
 	github.com/libp2p/go-maddr-filter v0.0.5
 	github.com/minio/blake2b-simd v0.0.0-20160723061019-3f5f724cb5b1
 	github.com/minio/sha256-simd v0.1.1
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/multiformats/go-base32 v0.0.3
-	github.com/multiformats/go-multiaddr v0.2.0
+	github.com/multiformats/go-multiaddr v0.2.1
 	github.com/multiformats/go-multiaddr-dns v0.2.0
-	github.com/multiformats/go-multiaddr-net v0.1.2
+	github.com/multiformats/go-multiaddr-net v0.1.3
 	github.com/multiformats/go-multihash v0.0.13
 	github.com/opentracing/opentracing-go v1.1.0
 	github.com/prometheus/common v0.4.0 // indirect
@@ -95,16 +99,22 @@ require (
 	github.com/whyrusleeping/cbor-gen v0.0.0-20200222160900-51052a1e8191
 	github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7
 	github.com/whyrusleeping/pubsub v0.0.0-20131020042734-02de8aa2db3d
-	go.opencensus.io v0.22.2
+	go.opencensus.io v0.22.3
 	go.uber.org/dig v1.8.0 // indirect
 	go.uber.org/fx v1.9.0
 	go.uber.org/goleak v1.0.0 // indirect
-	go.uber.org/multierr v1.4.0
-	go.uber.org/zap v1.13.0
+	go.uber.org/multierr v1.5.0
+	go.uber.org/zap v1.14.1
+	golang.org/x/crypto v0.0.0-20200317142112-1b76d66859c6 // indirect
+	golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect
+	golang.org/x/net v0.0.0-20200301022130-244492dfa37a // indirect
+	golang.org/x/sys v0.0.0-20200317113312-5766fd39f98d // indirect
 	golang.org/x/time v0.0.0-20190308202827-9d24e82272b4
+	golang.org/x/tools v0.0.0-20200318150045-ba25ddc85566 // indirect
 	golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543
 	gopkg.in/urfave/cli.v2 v2.0.0-20180128182452-d3ae77c26ac8
 	gotest.tools v2.2.0+incompatible
+	honnef.co/go/tools v0.0.1-2020.1.3 // indirect
 	launchpad.net/gocheck v0.0.0-20140225173054-000000000087 // indirect
 )
 
diff --git a/go.sum b/go.sum
index 1d1481fc2..5913eb2f1 100644
--- a/go.sum
+++ b/go.sum
@@ -10,7 +10,6 @@ github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/DataDog/zstd v1.4.1 h1:3oxKN3wbHibqx897utPC2LTQU4J+IHWWJO+glkAkpFM=
 github.com/DataDog/zstd v1.4.1/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
-github.com/GeertJohan/go.incremental v1.0.0 h1:7AH+pY1XUgQE4Y1HcXYaMqAI0m9yrFqo/jt0CW30vsg=
 github.com/GeertJohan/go.incremental v1.0.0/go.mod h1:6fAjUhbVuX1KcMD3c8TEgVUqmo4seqhv0i0kdATSkM0=
 github.com/GeertJohan/go.rice v1.0.0 h1:KkI6O9uMaQU3VEKaj01ulavtF7o1fWT7+pk/4voiMLQ=
 github.com/GeertJohan/go.rice v1.0.0/go.mod h1:eH6gbSOAUv07dQuZVnBmoDP8mgsM1rtixis4Tib9if0=
@@ -26,11 +25,8 @@ github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d/go.mod h1:3eOhrU
 github.com/Stebalien/go-bitfield v0.0.1 h1:X3kbSSPUaJK60wV2hjOPZwmpljr6VGCqdq4cBLhbQBo=
 github.com/Stebalien/go-bitfield v0.0.1/go.mod h1:GNjFpasyUVkHMsfEOk8EFLJ9syQ6SI+XWrX9Wf2XH0s=
 github.com/aead/siphash v1.0.1/go.mod h1:Nywa3cDsYNNK3gaciGTWPwHt0wlpNV15vwmswBAUSII=
-github.com/akavel/rsrc v0.8.0 h1:zjWn7ukO9Kc5Q62DOJCcxGpXC18RawVtYAGdz2aLlfw=
 github.com/akavel/rsrc v0.8.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
-github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc h1:cAKDfWh5VpdgMhJosfJnn5/FoN2SRZ4p7fJNX58YPaU=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf h1:qet1QNfXsQxTZqLG4oE62mJzwPIB8+Tee4RNCL9ulrY=
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/apache/thrift v0.12.0 h1:pODnxUFNcjP9UTLZGTdeh+j16A8lJbRvD3rOtrk/7bs=
 github.com/apache/thrift v0.12.0/go.mod h1:cp2SuWMxlEZw2r+iP2GNCdIi4C1qmUzdZFSVb+bacwQ=
@@ -78,6 +74,9 @@ github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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@@ -141,7 +139,6 @@ github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV
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@@ -242,18 +239,19 @@ github.com/ipfs/go-datastore v0.0.5/go.mod h1:d4KVXhMt913cLBEI/PXAy6ko+W7e9AhyAK
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@@ -275,7 +273,6 @@ github.com/ipfs/go-ipfs-chunker v0.0.1/go.mod h1:tWewYK0we3+rMbOh7pPFGDyypCtvGcB
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@@ -340,20 +337,21 @@ github.com/ipsn/go-secp256k1 v0.0.0-20180726113642-9d62b9f0bc52 h1:QG4CGBqCeuBo6
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@@ -365,7 +363,6 @@ github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvW
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@@ -399,8 +396,8 @@ github.com/libp2p/go-libp2p v0.1.0/go.mod h1:6D/2OBauqLUoqcADOJpn9WbKqvaM07tDw68
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@@ -426,8 +423,11 @@ github.com/libp2p/go-libp2p-core v0.0.9/go.mod h1:0d9xmaYAVY5qmbp/fcgxHT3ZJsLjYe
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@@ -452,8 +452,9 @@ github.com/libp2p/go-libp2p-loggables v0.1.0/go.mod h1:EyumB2Y6PrYjr55Q3/tiJ/o3x
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@@ -471,8 +472,10 @@ github.com/libp2p/go-libp2p-peerstore v0.0.6/go.mod h1:RabLyPVJLuNQ+GFyoEkfi8H4T
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@@ -504,7 +507,6 @@ github.com/libp2p/go-libp2p-testing v0.0.1/go.mod h1:gvchhf3FQOtBdr+eFUABet5a4MB
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@@ -513,21 +515,25 @@ github.com/libp2p/go-libp2p-tls v0.1.0/go.mod h1:VZdoSWQDeNpIIAFJFv+6uqTqpnIIDHc
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@@ -560,12 +566,13 @@ github.com/libp2p/go-ws-transport v0.2.0 h1:MJCw2OrPA9+76YNRvdo1wMnSOxb9Bivj6sVF
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@@ -609,8 +616,9 @@ github.com/multiformats/go-multiaddr v0.0.2/go.mod h1:xKVEak1K9cS1VdmPZW3LSIb6lg
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@@ -621,10 +629,10 @@ github.com/multiformats/go-multiaddr-fmt v0.1.0 h1:WLEFClPycPkp4fnIzoFoV9FVd49/e
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@@ -645,26 +653,25 @@ github.com/multiformats/go-varint v0.0.2/go.mod h1:3Ls8CIEsrijN6+B7PbrXRPxHRPuXS
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@@ -704,7 +711,6 @@ github.com/shirou/gopsutil v2.18.12+incompatible h1:1eaJvGomDnH74/5cF4CTmTbLHAri
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@@ -742,9 +748,7 @@ github.com/urfave/cli v1.20.0 h1:fDqGv3UG/4jbVl/QkFwEdddtEDjh/5Ov6X+0B/3bPaw=
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 github.com/urfave/cli/v2 v2.0.0 h1:+HU9SCbu8GnEUFtIBfuUNXN39ofWViIEJIp6SURMpCg=
 github.com/urfave/cli/v2 v2.0.0/go.mod h1:SE9GqnLQmjVa0iPEY0f1w3ygNIYcIJ0OKPMoW2caLfQ=
-github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
-github.com/valyala/fasttemplate v1.0.1 h1:tY9CJiPnMXf1ERmG2EyK7gNUd+c6RKGD0IfU8WdUSz8=
 github.com/valyala/fasttemplate v1.0.1/go.mod h1:UQGH1tvbgY+Nz5t2n7tXsz52dQxojPUpymEIMZ47gx8=
 github.com/warpfork/go-wish v0.0.0-20180510122957-5ad1f5abf436/go.mod h1:x6AKhvSSexNrVSrViXSHUEbICjmGXhtgABaHIySUSGw=
 github.com/warpfork/go-wish v0.0.0-20190328234359-8b3e70f8e830 h1:8kxMKmKzXXL4Ru1nyhvdms/JjWt+3YLpvRb/bAjO/y0=
@@ -778,15 +782,18 @@ github.com/whyrusleeping/timecache v0.0.0-20160911033111-cfcb2f1abfee h1:lYbXeSv
 github.com/whyrusleeping/timecache v0.0.0-20160911033111-cfcb2f1abfee/go.mod h1:m2aV4LZI4Aez7dP5PMyVKEHhUyEJ/RjmPEDOpDvudHg=
 github.com/x-cray/logrus-prefixed-formatter v0.5.2/go.mod h1:2duySbKsL6M18s5GU7VPsoEPHyzalCE06qoARUCeBBE=
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+github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 go.opencensus.io v0.20.1/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.1/go.mod h1:Ap50jQcDJrx6rB6VgeeFPtuPIf3wMRvRfrfYDO6+BmA=
-go.opencensus.io v0.22.2 h1:75k/FF0Q2YM8QYo07VPddOLBslDt1MZOdEslOHvmzAs=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
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 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
-go.uber.org/atomic v1.5.0 h1:OI5t8sDa1Or+q8AeE+yKeB/SDYioSHAgcVljj9JIETY=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
+go.uber.org/atomic v1.6.0 h1:Ezj3JGmsOnG1MoRWQkPBsKLe9DwWD9QeXzTRzzldNVk=
+go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
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@@ -794,14 +801,14 @@ go.uber.org/fx v1.9.0/go.mod h1:mFdUyAUuJ3w4jAckiKSKbldsxy1ojpAMJ+dVZg5Y0Aw=
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-go.uber.org/multierr v1.3.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4=
-go.uber.org/multierr v1.4.0 h1:f3WCSC2KzAcBXGATIxAB1E2XuCpNU255wNKZ505qi3E=
 go.uber.org/multierr v1.4.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4=
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@@ -819,17 +826,22 @@ golang.org/x/crypto v0.0.0-20190611184440-5c40567a22f8/go.mod h1:yigFU9vqHzYiE8U
 golang.org/x/crypto v0.0.0-20190618222545-ea8f1a30c443/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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@@ -846,16 +858,19 @@ golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn
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@@ -878,9 +893,12 @@ golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -901,8 +919,12 @@ golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtn
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 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -920,7 +942,6 @@ google.golang.org/genproto v0.0.0-20190425155659-357c62f0e4bb/go.mod h1:VzzqZJRn
 google.golang.org/grpc v1.17.0/go.mod h1:6QZJwpn2B+Zp71q/5VxRsJ6NXXVCE5NRUHRo+f3cWCs=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
-gopkg.in/alecthomas/kingpin.v2 v2.2.6 h1:jMFz6MfLP0/4fUyZle81rXUoxOBFi19VUFKVDOQfozc=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -945,7 +966,8 @@ gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20180728063816-88497007e858/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM=
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
+honnef.co/go/tools v0.0.1-2020.1.3 h1:sXmLre5bzIR6ypkjXCDI3jHPssRhc8KD/Ome589sc3U=
+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 launchpad.net/gocheck v0.0.0-20140225173054-000000000087 h1:Izowp2XBH6Ya6rv+hqbceQyw/gSGoXfH/UPoTGduL54=
 launchpad.net/gocheck v0.0.0-20140225173054-000000000087/go.mod h1:hj7XX3B/0A+80Vse0e+BUHsHMTEhd0O4cpUHr/e/BUM=
diff --git a/node/hello/hello.go b/node/hello/hello.go
index c1802f7cb..251642125 100644
--- a/node/hello/hello.go
+++ b/node/hello/hello.go
@@ -2,9 +2,10 @@ package hello
 
 import (
 	"context"
-	"github.com/filecoin-project/specs-actors/actors/abi"
 	"time"
 
+	"github.com/filecoin-project/specs-actors/actors/abi"
+
 	"github.com/filecoin-project/specs-actors/actors/abi/big"
 	"github.com/ipfs/go-cid"
 	logging "github.com/ipfs/go-log/v2"
diff --git a/node/modules/services.go b/node/modules/services.go
index 89a32b03f..73c9b1267 100644
--- a/node/modules/services.go
+++ b/node/modules/services.go
@@ -3,11 +3,13 @@ package modules
 import (
 	"context"
 
+	eventbus "github.com/libp2p/go-eventbus"
+	event "github.com/libp2p/go-libp2p-core/event"
 	"github.com/libp2p/go-libp2p-core/host"
-	inet "github.com/libp2p/go-libp2p-core/network"
 	peer "github.com/libp2p/go-libp2p-peer"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	"go.uber.org/fx"
+	"golang.org/x/xerrors"
 
 	"github.com/filecoin-project/go-fil-markets/retrievalmarket"
 	"github.com/filecoin-project/go-fil-markets/retrievalmarket/discovery"
@@ -23,20 +25,26 @@ import (
 	"github.com/filecoin-project/lotus/node/modules/helpers"
 )
 
-func RunHello(mctx helpers.MetricsCtx, lc fx.Lifecycle, h host.Host, svc *hello.Service) {
+func RunHello(mctx helpers.MetricsCtx, lc fx.Lifecycle, h host.Host, svc *hello.Service) error {
 	h.SetStreamHandler(hello.ProtocolID, svc.HandleStream)
 
-	bundle := inet.NotifyBundle{
-		ConnectedF: func(_ inet.Network, c inet.Conn) {
+	sub, err := h.EventBus().Subscribe(new(event.EvtPeerIdentificationCompleted), eventbus.BufSize(1024))
+	if err != nil {
+		return xerrors.Errorf("failed to subscribe to event bus: %w", err)
+	}
+
+	go func() {
+		for evt := range sub.Out() {
+			pic := evt.(event.EvtPeerIdentificationCompleted)
 			go func() {
-				if err := svc.SayHello(helpers.LifecycleCtx(mctx, lc), c.RemotePeer()); err != nil {
+				if err := svc.SayHello(helpers.LifecycleCtx(mctx, lc), pic.Peer); err != nil {
 					log.Warnw("failed to say hello", "error", err)
 					return
 				}
 			}()
-		},
-	}
-	h.Network().Notify(&bundle)
+		}
+	}()
+	return nil
 }
 
 func RunPeerMgr(mctx helpers.MetricsCtx, lc fx.Lifecycle, pmgr *peermgr.PeerMgr) {