diff --git a/api/client/client.go b/api/client/client.go
index 2aaa05579..3a9f37eed 100644
--- a/api/client/client.go
+++ b/api/client/client.go
@@ -2,12 +2,12 @@ package client
 
 import (
 	"github.com/filecoin-project/go-lotus/api"
-	"github.com/filecoin-project/go-lotus/rpclib"
+	"github.com/filecoin-project/go-lotus/jsonrpc"
 )
 
 // NewRPC creates a new http jsonrpc client.
 func NewRPC(addr string) api.API {
 	var res api.Struct
-	rpclib.NewClient(addr, "Filecoin", &res.Internal)
+	jsonrpc.NewClient(addr, "Filecoin", &res.Internal)
 	return &res
 }
diff --git a/cborrpc/rpc.go b/cborrpc/rpc.go
new file mode 100644
index 000000000..94bd3221c
--- /dev/null
+++ b/cborrpc/rpc.go
@@ -0,0 +1,33 @@
+package cborrpc
+
+import (
+	"io"
+	"io/ioutil"
+
+	cbor "github.com/ipfs/go-ipld-cbor"
+)
+const MessageSizeLimit = 1 << 20
+
+func WriteCborRPC(w io.Writer, obj interface{}) error {
+	data, err := cbor.DumpObject(obj)
+	if err != nil {
+		return err
+	}
+
+	_, err = w.Write(data)
+	return err
+}
+
+type ByteReader interface {
+	io.Reader
+	io.ByteReader
+}
+
+func ReadCborRPC(r ByteReader, out interface{}) error {
+	b, err := ioutil.ReadAll(r)
+	if err != nil {
+		return err
+	}
+
+	return cbor.DecodeInto(b, out)
+}
\ No newline at end of file
diff --git a/daemon/rpc.go b/daemon/rpc.go
index 78df124c2..b280200d2 100644
--- a/daemon/rpc.go
+++ b/daemon/rpc.go
@@ -4,11 +4,11 @@ import (
 	"net/http"
 
 	"github.com/filecoin-project/go-lotus/api"
-	"github.com/filecoin-project/go-lotus/rpclib"
+	"github.com/filecoin-project/go-lotus/jsonrpc"
 )
 
 func serveRPC(api api.API) error {
-	rpcServer := rpclib.NewServer()
+	rpcServer := jsonrpc.NewServer()
 	rpcServer.Register("Filecoin", api)
 	http.Handle("/rpc/v0", rpcServer)
 	return http.ListenAndServe(":1234", http.DefaultServeMux)
diff --git a/go.mod b/go.mod
index a729ed395..108d679e1 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.12
 require (
 	github.com/ipfs/go-datastore v0.0.5
 	github.com/ipfs/go-ipfs-routing v0.1.0
+	github.com/ipfs/go-ipld-cbor v0.0.2 // indirect
 	github.com/ipfs/go-log v0.0.2-0.20190703113630-0c3cfb1eccc4
 	github.com/libp2p/go-libp2p v0.2.0
 	github.com/libp2p/go-libp2p-circuit v0.1.0
diff --git a/go.sum b/go.sum
index 513d9e062..59eea47cc 100644
--- a/go.sum
+++ b/go.sum
@@ -45,6 +45,7 @@ github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
 github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY=
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/gorilla/websocket v1.4.0 h1:WDFjx/TMzVgy9VdMMQi2K2Emtwi2QcUQsztZ/zLaH/Q=
 github.com/gorilla/websocket v1.4.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
 github.com/gxed/hashland/keccakpg v0.0.1/go.mod h1:kRzw3HkwxFU1mpmPP8v1WyQzwdGfmKFJ6tItnhQ67kU=
@@ -61,6 +62,8 @@ github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpO
 github.com/huin/goupnp v1.0.0 h1:wg75sLpL6DZqwHQN6E1Cfk6mtfzS45z8OV+ic+DtHRo=
 github.com/huin/goupnp v1.0.0/go.mod h1:n9v9KO1tAxYH82qOn+UTIFQDmx5n1Zxd/ClZDMX7Bnc=
 github.com/huin/goutil v0.0.0-20170803182201-1ca381bf3150/go.mod h1:PpLOETDnJ0o3iZrZfqZzyLl6l7F3c6L1oWn7OICBi6o=
+github.com/ipfs/go-block-format v0.0.2 h1:qPDvcP19izTjU8rgo6p7gTXZlkMkF5bz5G3fqIsSCPE=
+github.com/ipfs/go-block-format v0.0.2/go.mod h1:AWR46JfpcObNfg3ok2JHDUfdiHRgWhJgCQF+KIgOPJY=
 github.com/ipfs/go-cid v0.0.1/go.mod h1:GHWU/WuQdMPmIosc4Yn1bcCT7dSeX4lBafM7iqUPQvM=
 github.com/ipfs/go-cid v0.0.2 h1:tuuKaZPU1M6HcejsO3AcYWW8sZ8MTvyxfc4uqB4eFE8=
 github.com/ipfs/go-cid v0.0.2/go.mod h1:GHWU/WuQdMPmIosc4Yn1bcCT7dSeX4lBafM7iqUPQvM=
@@ -78,6 +81,9 @@ github.com/ipfs/go-ipfs-routing v0.1.0 h1:gAJTT1cEeeLj6/DlLX6t+NxD9fQe2ymTO6qWRD
 github.com/ipfs/go-ipfs-routing v0.1.0/go.mod h1:hYoUkJLyAUKhF58tysKpids8RNDPO42BVMgK5dNsoqY=
 github.com/ipfs/go-ipfs-util v0.0.1 h1:Wz9bL2wB2YBJqggkA4dD7oSmqB4cAnpNbGrlHJulv50=
 github.com/ipfs/go-ipfs-util v0.0.1/go.mod h1:spsl5z8KUnrve+73pOhSVZND1SIxPW5RyBCNzQxlJBc=
+github.com/ipfs/go-ipld-cbor v0.0.2/go.mod h1:wTBtrQZA3SoFKMVkp6cn6HMRteIB1VsmHA0AQFOn7Nc=
+github.com/ipfs/go-ipld-format v0.0.1 h1:HCu4eB/Gh+KD/Q0M8u888RFkorTWNIL3da4oc5dwc80=
+github.com/ipfs/go-ipld-format v0.0.1/go.mod h1:kyJtbkDALmFHv3QR6et67i35QzO3S0dCDnkOJhcZkms=
 github.com/ipfs/go-log v0.0.1 h1:9XTUN/rW64BCG1YhPK9Hoy3q8nr4gOmHHBpgFdfw6Lc=
 github.com/ipfs/go-log v0.0.1/go.mod h1:kL1d2/hzSpI0thNYjiKfjanbVNU+IIGA/WnNESY9leM=
 github.com/ipfs/go-log v0.0.2-0.20190703113630-0c3cfb1eccc4 h1:4GUopYwyu/8kX0UxYB7QDYOUbnt9HCg/j6J0sMqVvNQ=
@@ -98,6 +104,7 @@ github.com/jbenet/goprocess v0.1.3 h1:YKyIEECS/XvcfHtBzxtjBBbWK+MbvA6dG8ASiqwvr1
 github.com/jbenet/goprocess v0.1.3/go.mod h1:5yspPrukOVuOLORacaBi858NqyClJPQxYZlqdZVfqY4=
 github.com/jessevdk/go-flags v0.0.0-20141203071132-1679536dcc89/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
 github.com/jrick/logrotate v1.0.0/go.mod h1:LNinyqDIJnpAur+b8yyulnQw/wDuN1+BYKlTRt3OuAQ=
+github.com/jtolds/gls v4.2.1+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
 github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kkdai/bstream v0.0.0-20161212061736-f391b8402d23/go.mod h1:J+Gs4SYgM6CZQHDETBtE9HaSEkGmuNXF86RwHhHUvq4=
@@ -262,6 +269,10 @@ github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/polydawn/refmt v0.0.0-20190221155625-df39d6c2d992 h1:bzMe+2coZJYHnhGgVlcQKuRy4FSny4ds8dLQjw5P1XE=
+github.com/polydawn/refmt v0.0.0-20190221155625-df39d6c2d992/go.mod h1:uIp+gprXxxrWSjjklXD+mN4wed/tMfjMMmN/9+JsA9o=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
+github.com/smartystreets/goconvey v0.0.0-20190222223459-a17d461953aa/go.mod h1:2RVY1rIf+2J2o/IM9+vPq9RzmHDSseB7FoXiSNIUsoU=
 github.com/spacemonkeygo/openssl v0.0.0-20181017203307-c2dcc5cca94a h1:/eS3yfGjQKG+9kayBkj0ip1BGhq6zJ3eaVksphxAaek=
 github.com/spacemonkeygo/openssl v0.0.0-20181017203307-c2dcc5cca94a/go.mod h1:7AyxJNCJ7SBZ1MfVQCWD6Uqo2oubI2Eq2y2eqf+A5r0=
 github.com/spacemonkeygo/spacelog v0.0.0-20180420211403-2296661a0572 h1:RC6RW7j+1+HkWaX/Yh71Ee5ZHaHYt7ZP4sQgUrm6cDU=
@@ -272,6 +283,7 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/syndtr/goleveldb v1.0.0/go.mod h1:ZVVdQEZoIme9iO1Ch2Jdy24qqXrMMOU6lpPAyBWyWuQ=
+github.com/warpfork/go-wish v0.0.0-20180510122957-5ad1f5abf436/go.mod h1:x6AKhvSSexNrVSrViXSHUEbICjmGXhtgABaHIySUSGw=
 github.com/whyrusleeping/base32 v0.0.0-20170828182744-c30ac30633cc h1:BCPnHtcboadS0DvysUuJXZ4lWVv5Bh5i7+tbIyi+ck4=
 github.com/whyrusleeping/base32 v0.0.0-20170828182744-c30ac30633cc/go.mod h1:r45hJU7yEoA81k6MWNhpMj/kms0n14dkzkxYHoB96UM=
 github.com/whyrusleeping/go-keyspace v0.0.0-20160322163242-5b898ac5add1 h1:EKhdznlJHPMoKr0XTrX+IlJs1LH3lyx2nfr1dOlZ79k=
diff --git a/rpclib/rpc_client.go b/jsonrpc/rpc_client.go
similarity index 99%
rename from rpclib/rpc_client.go
rename to jsonrpc/rpc_client.go
index f8116c825..e9418040b 100644
--- a/rpclib/rpc_client.go
+++ b/jsonrpc/rpc_client.go
@@ -1,4 +1,4 @@
-package rpclib
+package jsonrpc
 
 import (
 	"bytes"
diff --git a/rpclib/rpc_server.go b/jsonrpc/rpc_server.go
similarity index 99%
rename from rpclib/rpc_server.go
rename to jsonrpc/rpc_server.go
index 5ef1560e7..104380861 100644
--- a/rpclib/rpc_server.go
+++ b/jsonrpc/rpc_server.go
@@ -1,4 +1,4 @@
-package rpclib
+package jsonrpc
 
 import (
 	"bytes"
diff --git a/rpclib/rpc_test.go b/jsonrpc/rpc_test.go
similarity index 99%
rename from rpclib/rpc_test.go
rename to jsonrpc/rpc_test.go
index 4879a3e3e..d496e25c5 100644
--- a/rpclib/rpc_test.go
+++ b/jsonrpc/rpc_test.go
@@ -1,4 +1,4 @@
-package rpclib
+package jsonrpc
 
 import (
 	"context"
diff --git a/node/builder.go b/node/builder.go
index 5b94dcae1..349b548cc 100644
--- a/node/builder.go
+++ b/node/builder.go
@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/ipfs/go-datastore"
+	logging "github.com/ipfs/go-log"
 	ci "github.com/libp2p/go-libp2p-core/crypto"
 	"github.com/libp2p/go-libp2p-core/peer"
 	"github.com/libp2p/go-libp2p-peerstore/pstoremem"
@@ -13,11 +14,14 @@ import (
 
 	"github.com/filecoin-project/go-lotus/api"
 	"github.com/filecoin-project/go-lotus/build"
+	"github.com/filecoin-project/go-lotus/node/hello"
 	"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"
 )
 
+var log = logging.Logger("builder")
+
 var defaultListenAddrs = []string{ // TODO: better defaults?
 	"/ip4/0.0.0.0/tcp/4001",
 	"/ip6/::/tcp/4001",
@@ -42,6 +46,7 @@ func New(ctx context.Context) (api.API, error) {
 			fx.Provide(
 				pstoremem.NewPeerstore,
 
+				// libp2p
 				lp2p.DefaultTransports,
 				lp2p.PNet,
 				lp2p.Host,
@@ -59,6 +64,10 @@ func New(ctx context.Context) (api.API, error) {
 
 				lp2p.NatPortMap,
 				lp2p.ConnectionManager(50, 200, 20*time.Second),
+
+				// filecoin protocols
+
+				hello.NewHelloService,
 			),
 
 			fx.Invoke(
@@ -69,6 +78,8 @@ func New(ctx context.Context) (api.API, error) {
 
 		fx.Invoke(versionAPI(&resAPI.Internal.Version)),
 		fx.Invoke(idAPI(&resAPI.Internal.ID)),
+
+		fx.Logger(&debugPrinter{log}),
 	)
 
 	if err := app.Start(ctx); err != nil {
diff --git a/node/fxlog.go b/node/fxlog.go
new file mode 100644
index 000000000..3f0e18d64
--- /dev/null
+++ b/node/fxlog.go
@@ -0,0 +1,17 @@
+package node
+
+import (
+	logging "github.com/ipfs/go-log"
+
+	"go.uber.org/fx"
+)
+
+type debugPrinter struct {
+	l logging.StandardLogger
+}
+
+func (p *debugPrinter) Printf(f string, a ...interface{}) {
+	p.l.Debugf(f, a...)
+}
+
+var _ fx.Printer = new(debugPrinter)
diff --git a/node/hello/hello.go b/node/hello/hello.go
new file mode 100644
index 000000000..bcb36ce3c
--- /dev/null
+++ b/node/hello/hello.go
@@ -0,0 +1,99 @@
+package hello
+
+import (
+	"bufio"
+	"context"
+	"github.com/filecoin-project/go-lotus/cborrpc"
+	"github.com/libp2p/go-libp2p-core/host"
+
+	"github.com/ipfs/go-cid"
+	cbor "github.com/ipfs/go-ipld-cbor"
+	logging "github.com/ipfs/go-log"
+	inet "github.com/libp2p/go-libp2p-core/network"
+	"github.com/libp2p/go-libp2p-core/peer"
+	"github.com/libp2p/go-libp2p-core/protocol"
+)
+
+const ProtocolID = "/fil/hello/1.0.0"
+var log = logging.Logger("hello")
+
+func init() {
+	cbor.RegisterCborType(Message{})
+}
+
+type Message struct {
+	HeaviestTipSet       []cid.Cid
+	HeaviestTipSetWeight uint64
+	GenesisHash          cid.Cid
+}
+
+type NewStreamFunc func(context.Context, peer.ID, ...protocol.ID) (inet.Stream, error)
+
+type Service struct {
+	newStream NewStreamFunc
+
+	//cs        *ChainStore
+	//syncer    *Syncer
+}
+
+func NewHelloService(h host.Host) *Service {
+	return &Service{
+		newStream: h.NewStream,
+	}
+}
+
+func (hs *Service) HandleStream(s inet.Stream) {
+	defer s.Close()
+
+	log.Debugw("Handling hello")
+
+	var hmsg Message
+	if err := cborrpc.ReadCborRPC(bufio.NewReader(s), &hmsg); err != nil {
+		log.Error("failed to read hello message: ", err)
+		return
+	}
+	log.Debugw("heaviest tipset", "tipset", hmsg.HeaviestTipSet)
+	log.Debugw("got genesis from hello", "hash", hmsg.GenesisHash)
+
+	/*if hmsg.GenesisHash != hs.syncer.genesis.Cids()[0] {
+		log.Error("other peer has different genesis!")
+		s.Conn().Close()
+		return
+	}
+
+	ts, err := hs.syncer.FetchTipSet(context.Background(), s.Conn().RemotePeer(), hmsg.HeaviestTipSet)
+	if err != nil {
+		log.Errorf("failed to fetch tipset from peer during hello: %s", err)
+		return
+	}
+
+	hs.syncer.InformNewHead(s.Conn().RemotePeer(), ts)*/
+}
+
+func (hs *Service) SayHello(ctx context.Context, pid peer.ID) error {
+	/*s, err := hs.newStream(ctx, pid, ProtocolID)
+	if err != nil {
+		return err
+	}
+
+	hts := hs.cs.GetHeaviestTipSet()
+	weight := hs.cs.Weight(hts)
+	gen, err := hs.cs.GetGenesis()
+	if err != nil {
+		return err
+	}
+
+	hmsg := &Message{
+		HeaviestTipSet:       hts.Cids(),
+		HeaviestTipSetWeight: weight,
+		GenesisHash:          gen.Cid(),
+	}
+	fmt.Println("SENDING HELLO MESSAGE: ", hts.Cids())
+	fmt.Println("hello message genesis: ", gen.Cid())
+
+	if err := WriteCborRPC(s, hmsg); err != nil {
+		return err
+	}*/
+
+	return nil
+}
\ No newline at end of file
diff --git a/node/modules/core.go b/node/modules/core.go
index 5bc21fcf5..070cdef99 100644
--- a/node/modules/core.go
+++ b/node/modules/core.go
@@ -1,10 +1,13 @@
 package modules
 
 import (
+	logging "github.com/ipfs/go-log"
 	"github.com/libp2p/go-libp2p-core/peerstore"
 	record "github.com/libp2p/go-libp2p-record"
 )
 
+var log = logging.Logger("modules")
+
 // RecordValidator provides namesys compatible routing record validator
 func RecordValidator(ps peerstore.Peerstore) record.Validator {
 	return record.NamespacedValidator{
diff --git a/node/modules/hello.go b/node/modules/hello.go
new file mode 100644
index 000000000..ec945ee2b
--- /dev/null
+++ b/node/modules/hello.go
@@ -0,0 +1,25 @@
+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 HandleHello(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) {
+			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)
+}