diff --git a/chain/sub/incoming.go b/chain/sub/incoming.go
new file mode 100644
index 000000000..a8e63bc3c
--- /dev/null
+++ b/chain/sub/incoming.go
@@ -0,0 +1,62 @@
+package sub
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/filecoin-project/go-lotus/chain"
+	logging "github.com/ipfs/go-log"
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
+)
+
+var log = logging.Logger("sub")
+
+func HandleIncomingBlocks(ctx context.Context, bsub *pubsub.Subscription, s *chain.Syncer) {
+	for {
+		msg, err := bsub.Next(ctx)
+		if err != nil {
+			fmt.Println("error from block subscription: ", err)
+			continue
+		}
+
+		blk, err := chain.DecodeBlockMsg(msg.GetData())
+		if err != nil {
+			log.Error("got invalid block over pubsub: ", err)
+			continue
+		}
+
+		go func() {
+			msgs, err := s.Bsync.FetchMessagesByCids(blk.Messages)
+			if err != nil {
+				log.Errorf("failed to fetch all messages for block received over pubusb: %s", err)
+				return
+			}
+			fmt.Println("inform new block over pubsub")
+			s.InformNewBlock(msg.GetFrom(), &chain.FullBlock{
+				Header:   blk.Header,
+				Messages: msgs,
+			})
+		}()
+	}
+}
+
+func HandleIncomingMessages(ctx context.Context, mpool *chain.MessagePool, msub *pubsub.Subscription) {
+	for {
+		msg, err := msub.Next(ctx)
+		if err != nil {
+			fmt.Println("error from message subscription: ", err)
+			continue
+		}
+
+		m, err := chain.DecodeSignedMessage(msg.GetData())
+		if err != nil {
+			log.Errorf("got incorrectly formatted Message: %s", err)
+			continue
+		}
+
+		if err := mpool.Add(m); err != nil {
+			log.Errorf("failed to add message from network to message pool: %s", err)
+			continue
+		}
+	}
+}
diff --git a/chain/sync.go b/chain/sync.go
index 67321aabb..ca0aafa60 100644
--- a/chain/sync.go
+++ b/chain/sync.go
@@ -35,7 +35,7 @@ type Syncer struct {
 	bad BadTipSetCache
 
 	// handle to the block sync service
-	bsync *BlockSync
+	Bsync *BlockSync
 
 	// peer heads
 	// Note: clear cache on disconnects
@@ -57,7 +57,7 @@ func NewSyncer(cs *ChainStore, bsync *BlockSync) (*Syncer, error) {
 	return &Syncer{
 		syncMode:  Bootstrap,
 		Genesis:   gent,
-		bsync:     bsync,
+		Bsync:     bsync,
 		peerHeads: make(map[peer.ID]*TipSet),
 		head:      cs.GetHeaviestTipSet(),
 		store:     cs,
@@ -123,7 +123,7 @@ func (syncer *Syncer) InformNewHead(from peer.ID, fts *FullTipSet) {
 	syncer.peerHeadsLk.Lock()
 	syncer.peerHeads[from] = fts.TipSet()
 	syncer.peerHeadsLk.Unlock()
-	syncer.bsync.AddPeer(from)
+	syncer.Bsync.AddPeer(from)
 
 	go func() {
 		syncer.syncLock.Lock()
@@ -185,7 +185,7 @@ func (syncer *Syncer) SyncBootstrap() {
 		// requested, and that they are correctly linked to eachother. It does
 		// not validate any state transitions
 		fmt.Println("Get blocks: ", cur)
-		blks, err := syncer.bsync.GetBlocks(context.TODO(), cur, 10)
+		blks, err := syncer.Bsync.GetBlocks(context.TODO(), cur, 10)
 		if err != nil {
 			log.Error("failed to get blocks: ", err)
 			return
@@ -238,7 +238,7 @@ func (syncer *Syncer) SyncBootstrap() {
 		}
 
 		next := blockSet[nextHeight]
-		bstips, err := syncer.bsync.GetChainMessages(ctx, next, (nextHeight+1)-i)
+		bstips, err := syncer.Bsync.GetChainMessages(ctx, next, (nextHeight+1)-i)
 		if err != nil {
 			log.Errorf("failed to fetch messages: %s", err)
 			return
@@ -400,7 +400,7 @@ func (syncer *Syncer) FetchTipSet(ctx context.Context, p peer.ID, cids []cid.Cid
 		return fts, nil
 	}
 
-	return syncer.bsync.GetFullTipSet(ctx, p, cids)
+	return syncer.Bsync.GetFullTipSet(ctx, p, cids)
 }
 
 func (syncer *Syncer) tryLoadFullTipSet(cids []cid.Cid) (*FullTipSet, error) {
diff --git a/node/builder.go b/node/builder.go
index 347315f64..e4b2b7f1f 100644
--- a/node/builder.go
+++ b/node/builder.go
@@ -3,19 +3,19 @@ package node
 import (
 	"context"
 	"errors"
-	"github.com/filecoin-project/go-lotus/node/modules/testing"
-	blockstore "github.com/ipfs/go-ipfs-blockstore"
-	exchange "github.com/ipfs/go-ipfs-exchange-interface"
 	"reflect"
 	"time"
 
 	"github.com/ipfs/go-datastore"
+	blockstore "github.com/ipfs/go-ipfs-blockstore"
+	exchange "github.com/ipfs/go-ipfs-exchange-interface"
 	ci "github.com/libp2p/go-libp2p-core/crypto"
 	"github.com/libp2p/go-libp2p-core/host"
 	"github.com/libp2p/go-libp2p-core/peer"
 	"github.com/libp2p/go-libp2p-core/peerstore"
 	"github.com/libp2p/go-libp2p-core/routing"
 	"github.com/libp2p/go-libp2p-peerstore/pstoremem"
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	record "github.com/libp2p/go-libp2p-record"
 	"go.uber.org/fx"
 
@@ -27,6 +27,7 @@ import (
 	"github.com/filecoin-project/go-lotus/node/modules"
 	"github.com/filecoin-project/go-lotus/node/modules/helpers"
 	"github.com/filecoin-project/go-lotus/node/modules/lp2p"
+	"github.com/filecoin-project/go-lotus/node/modules/testing"
 )
 
 // special is a type used to give keys to modules which
@@ -58,7 +59,12 @@ const (
 
 	// filecoin
 	SetGenisisKey
+
 	RunHelloKey
+	RunBlockSyncKey
+
+	HandleIncomingBlocksKey
+	HandleIncomingMessagesKey
 
 	_nInvokes // keep this last
 )
@@ -146,6 +152,8 @@ func Online() Option {
 		Override(NatPortMapKey, lp2p.NatPortMap),
 		Override(ConnectionManagerKey, lp2p.ConnectionManager(50, 200, 20*time.Second)),
 
+		Override(new(*pubsub.PubSub), lp2p.GossipSub()),
+
 		Override(PstoreAddSelfKeysKey, lp2p.PstoreAddSelfKeys),
 		Override(StartListeningKey, lp2p.StartListening(defConf.Libp2p.ListenAddresses)),
 
@@ -159,14 +167,18 @@ func Online() Option {
 		Override(new(*chain.Syncer), chain.NewSyncer),
 		Override(new(*chain.BlockSync), chain.NewBlockSyncClient),
 		Override(new(*chain.Wallet), chain.NewWallet),
+		Override(new(*chain.MessagePool), chain.NewMessagePool),
 
 		Override(new(modules.Genesis), testing.MakeGenesis),
 		Override(SetGenisisKey, modules.SetGenesis),
 
 		Override(new(*hello.Service), hello.NewHelloService),
-		Override(RunHelloKey, hello.Run),
+		Override(new(*chain.BlockSyncService), chain.NewBlockSyncService),
+		Override(RunHelloKey, modules.RunHello),
+		Override(RunBlockSyncKey, modules.RunBlockSync),
+		Override(HandleIncomingBlocksKey, modules.HandleIncomingBlocks),
+		Override(HandleIncomingMessagesKey, modules.HandleIncomingMessages),
 	)
-
 }
 
 // Config sets up constructors based on the provided config
diff --git a/node/hello/hello.go b/node/hello/hello.go
index 65f9a6e8e..d45aca7c7 100644
--- a/node/hello/hello.go
+++ b/node/hello/hello.go
@@ -5,9 +5,6 @@ import (
 	"fmt"
 	"github.com/filecoin-project/go-lotus/chain"
 	"github.com/filecoin-project/go-lotus/lib/cborrpc"
-	"github.com/filecoin-project/go-lotus/node/modules/helpers"
-	"go.uber.org/fx"
-
 	"github.com/libp2p/go-libp2p-core/host"
 
 	"github.com/ipfs/go-cid"
@@ -102,20 +99,3 @@ func (hs *Service) SayHello(ctx context.Context, pid peer.ID) error {
 
 	return nil
 }
-
-func Run(mctx helpers.MetricsCtx, lc fx.Lifecycle, hs *Service, h host.Host) {
-	ctx := helpers.LifecycleCtx(mctx, lc)
-	h.SetStreamHandler(ProtocolID, hs.HandleStream)
-
-	bundle := inet.NotifyBundle{
-		ConnectedF: func(_ inet.Network, c inet.Conn) {
-			go func() {
-				if err := hs.SayHello(ctx, c.RemotePeer()); err != nil {
-					log.Error("failed to say hello: ", err)
-					return
-				}
-			}()
-		},
-	}
-	h.Network().Notify(&bundle)
-}
diff --git a/node/modules/hello.go b/node/modules/hello.go
deleted file mode 100644
index aa1cdfeae..000000000
--- a/node/modules/hello.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package modules
-
-import (
-	"github.com/filecoin-project/go-lotus/node/hello"
-	"github.com/filecoin-project/go-lotus/node/modules/helpers"
-	"github.com/libp2p/go-libp2p-core/host"
-	inet "github.com/libp2p/go-libp2p-core/network"
-	"go.uber.org/fx"
-)
-
-func RunHello(mctx helpers.MetricsCtx, lc fx.Lifecycle, h host.Host, svc *hello.Service) {
-	h.SetStreamHandler(hello.ProtocolID, svc.HandleStream)
-
-	bundle := inet.NotifyBundle{
-		ConnectedF: func(_ inet.Network, c inet.Conn) {
-			go func() {
-				if err := svc.SayHello(helpers.LifecycleCtx(mctx, lc), c.RemotePeer()); err != nil {
-					log.Warnw("failed to say hello", "error", err)
-					return
-				}
-			}()
-		},
-	}
-	h.Network().Notify(&bundle)
-}
diff --git a/node/modules/services.go b/node/modules/services.go
new file mode 100644
index 000000000..f1af01436
--- /dev/null
+++ b/node/modules/services.go
@@ -0,0 +1,54 @@
+package modules
+
+import (
+	"github.com/filecoin-project/go-lotus/chain"
+	"github.com/filecoin-project/go-lotus/chain/sub"
+	"github.com/filecoin-project/go-lotus/node/hello"
+	"github.com/filecoin-project/go-lotus/node/modules/helpers"
+	"github.com/libp2p/go-libp2p-core/host"
+	inet "github.com/libp2p/go-libp2p-core/network"
+	pubsub "github.com/libp2p/go-libp2p-pubsub"
+	"go.uber.org/fx"
+)
+
+func RunHello(mctx helpers.MetricsCtx, lc fx.Lifecycle, h host.Host, svc *hello.Service) {
+	h.SetStreamHandler(hello.ProtocolID, svc.HandleStream)
+
+	bundle := inet.NotifyBundle{
+		ConnectedF: func(_ inet.Network, c inet.Conn) {
+			go func() {
+				if err := svc.SayHello(helpers.LifecycleCtx(mctx, lc), c.RemotePeer()); err != nil {
+					log.Warnw("failed to say hello", "error", err)
+					return
+				}
+			}()
+		},
+	}
+	h.Network().Notify(&bundle)
+}
+
+func RunBlockSync(h host.Host, svc *chain.BlockSyncService) {
+	h.SetStreamHandler(chain.BlockSyncProtocolID, svc.HandleStream)
+}
+
+func HandleIncomingBlocks(mctx helpers.MetricsCtx, lc fx.Lifecycle, pubsub *pubsub.PubSub, s *chain.Syncer) {
+	ctx := helpers.LifecycleCtx(mctx, lc)
+
+	blocksub, err := pubsub.Subscribe("/fil/blocks")
+	if err != nil {
+		panic(err)
+	}
+
+	go sub.HandleIncomingBlocks(ctx, blocksub, s)
+}
+
+func HandleIncomingMessages(mctx helpers.MetricsCtx, lc fx.Lifecycle, pubsub *pubsub.PubSub, mpool *chain.MessagePool) {
+	ctx := helpers.LifecycleCtx(mctx, lc)
+
+	msgsub, err := pubsub.Subscribe("/fil/messages")
+	if err != nil {
+		panic(err)
+	}
+
+	go sub.HandleIncomingMessages(ctx, mpool, msgsub)
+}