diff --git a/node/config/doc_gen.go b/node/config/doc_gen.go
index 9efe4e03c..05e7afff4 100644
--- a/node/config/doc_gen.go
+++ b/node/config/doc_gen.go
@@ -525,6 +525,12 @@ Type: Array of multiaddress peerinfo strings, must include peerid (/p2p/12D3K...
 			Name: "RemoteTracer",
 			Type: "string",
 
+			Comment: ``,
+		},
+		{
+			Name: "JsonTracerFile",
+			Type: "string",
+
 			Comment: ``,
 		},
 	},
diff --git a/node/config/types.go b/node/config/types.go
index 1576169e6..05ea472f3 100644
--- a/node/config/types.go
+++ b/node/config/types.go
@@ -309,6 +309,7 @@ type Pubsub struct {
 	DirectPeers           []string
 	IPColocationWhitelist []string
 	RemoteTracer          string
+	JsonTracerFile        string
 }
 
 type Chainstore struct {
diff --git a/node/modules/lp2p/pubsub.go b/node/modules/lp2p/pubsub.go
index 321108e4a..6cf52fdf0 100644
--- a/node/modules/lp2p/pubsub.go
+++ b/node/modules/lp2p/pubsub.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"encoding/json"
 	"net"
+	"os"
 	"time"
 
 	host "github.com/libp2p/go-libp2p-core/host"
@@ -21,6 +22,7 @@ import (
 	"github.com/filecoin-project/lotus/node/config"
 	"github.com/filecoin-project/lotus/node/modules/dtypes"
 	"github.com/filecoin-project/lotus/node/modules/helpers"
+	"github.com/filecoin-project/lotus/node/modules/tracer"
 )
 
 func init() {
@@ -55,10 +57,10 @@ type PeerScoreTracker interface {
 
 type peerScoreTracker struct {
 	sk *dtypes.ScoreKeeper
-	lt LotusTracer
+	lt tracer.LotusTracer
 }
 
-func newPeerScoreTracker(lt LotusTracer, sk *dtypes.ScoreKeeper) PeerScoreTracker {
+func newPeerScoreTracker(lt tracer.LotusTracer, sk *dtypes.ScoreKeeper) PeerScoreTracker {
 	return &peerScoreTracker{
 		sk: sk,
 		lt: lt,
@@ -67,7 +69,7 @@ func newPeerScoreTracker(lt LotusTracer, sk *dtypes.ScoreKeeper) PeerScoreTracke
 
 func (pst *peerScoreTracker) UpdatePeerScore(scores map[peer.ID]*pubsub.PeerScoreSnapshot) {
 	if pst.lt != nil {
-		pst.lt.TracePeerScore(scores)
+		pst.lt.PeerScores(scores)
 	}
 
 	pst.sk.Update(scores)
@@ -364,6 +366,17 @@ func GossipSub(in GossipIn) (service *pubsub.PubSub, err error) {
 				pubsub.NewAllowlistSubscriptionFilter(allowTopics...),
 				100)))
 
+	var lt tracer.LotusTracer
+	if in.Cfg.JsonTracerFile != "" {
+		out, err := os.OpenFile(in.Cfg.JsonTracerFile, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0660)
+		if err != nil {
+			return nil, err
+		}
+
+		jsonTransport := tracer.NewJsonTracerTransport(out)
+		lt = tracer.NewLotusTracer(jsonTransport, in.Host.ID())
+	}
+
 	// tracer
 	if in.Cfg.RemoteTracer != "" {
 		a, err := ma.NewMultiaddr(in.Cfg.RemoteTracer)
@@ -381,7 +394,6 @@ func GossipSub(in GossipIn) (service *pubsub.PubSub, err error) {
 			return nil, err
 		}
 
-		lt := newLotusTracer(tr)
 		pst := newPeerScoreTracker(lt, in.Sk)
 		trw := newTracerWrapper(tr, lt, build.BlocksTopic(in.Nn))
 
diff --git a/node/modules/tracer/json_transport.go b/node/modules/tracer/json_transport.go
new file mode 100644
index 000000000..2ab004d9c
--- /dev/null
+++ b/node/modules/tracer/json_transport.go
@@ -0,0 +1,20 @@
+package tracer
+
+import (
+	"os"
+)
+
+type jsonTracerTransport struct {
+	out *os.File
+}
+
+func NewJsonTracerTransport(out *os.File) TracerTransport {
+	return &jsonTracerTransport{
+		out: out,
+	}
+}
+
+func (jtt *jsonTracerTransport) Transport(jsonEvent []byte) error {
+	_, err := jtt.out.Write(jsonEvent)
+	return err
+}
diff --git a/node/modules/tracer/tracer.go b/node/modules/tracer/tracer.go
index a19ae065d..af3a987b0 100644
--- a/node/modules/tracer/tracer.go
+++ b/node/modules/tracer/tracer.go
@@ -1,28 +1,87 @@
 package tracer
 
 import (
-	peer "github.com/libp2p/go-libp2p-core/peer"
+	"encoding/json"
+	"time"
+
+	logging "github.com/ipfs/go-log/v2"
+	"github.com/libp2p/go-libp2p-core/peer"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	pubsub_pb "github.com/libp2p/go-libp2p-pubsub/pb"
 )
 
-func newLotusTracer(et pubsub.EventTracer, tt TracerTransport) LotusTracer {
+var log = logging.Logger("lotus-tracer")
+
+func NewLotusTracer(tt TracerTransport, pid peer.ID) LotusTracer {
 	return &lotusTracer{
-		et: et,
-		tt: tt,
+		tt:  tt,
+		pid: pid,
 	}
 }
 
 type lotusTracer struct {
-	et pubsub.EventTracer
-	tt TracerTransport
+	tt  TracerTransport
+	pid peer.ID
+}
+
+const (
+	TraceEvent_PEER_SCORES pubsub_pb.TraceEvent_Type = 100
+)
+
+type LotusTraceEvent struct {
+	Type       pubsub_pb.TraceEvent_Type `json:"type,omitempty"`
+	PeerID     []byte                    `json:"peerID,omitempty"`
+	Timestamp  *int64                    `json:"timestamp,omitempty"`
+	PeerScores *TraceEvent_PeerScores    `json:"peerScores,omitempty"`
+}
+
+type TraceEvent_PeerScores struct {
+	Scores map[peer.ID]*pubsub.PeerScoreSnapshot `json:"scores,omitempty"`
 }
 
 type LotusTracer interface {
-	TracePeerScore(scores map[peer.ID]*pubsub.PeerScoreSnapshot)
 	Trace(evt *pubsub_pb.TraceEvent)
+	TraceLotusEvent(evt *LotusTraceEvent)
+
+	PeerScores(scores map[peer.ID]*pubsub.PeerScoreSnapshot)
 }
 
-func (lt *lotusTracer) TracePeerScore(scores map[peer.ID]*pubsub.PeerScoreSnapshot) {}
+func (lt *lotusTracer) PeerScores(scores map[peer.ID]*pubsub.PeerScoreSnapshot) {
+	now := time.Now().UnixNano()
+	evt := &LotusTraceEvent{
+		Type:      *TraceEvent_PEER_SCORES.Enum(),
+		PeerID:    []byte(lt.pid),
+		Timestamp: &now,
+		PeerScores: &TraceEvent_PeerScores{
+			Scores: scores,
+		},
+	}
 
-func (lt *lotusTracer) Trace(evt *pubsub_pb.TraceEvent) {}
+	lt.TraceLotusEvent(evt)
+}
+
+func (lt *lotusTracer) TraceLotusEvent(evt *LotusTraceEvent) {
+	jsonEvent, err := json.Marshal(evt)
+	if err != nil {
+		log.Errorf("error while marshaling peer score: %s", err)
+		return
+	}
+
+	err = lt.tt.Transport(jsonEvent)
+	if err != nil {
+		log.Errorf("error while transporting peer scores: %s", err)
+	}
+}
+
+func (lt *lotusTracer) Trace(evt *pubsub_pb.TraceEvent) {
+	jsonEvent, err := json.Marshal(evt)
+	if err != nil {
+		log.Errorf("error while marshaling tracer event: %s", err)
+		return
+	}
+
+	err = lt.tt.Transport(jsonEvent)
+	if err != nil {
+		log.Errorf("error while transporting trace event: %s", err)
+	}
+}
diff --git a/node/modules/tracer/transport.go b/node/modules/tracer/transport.go
index 73ef80690..c8495821e 100644
--- a/node/modules/tracer/transport.go
+++ b/node/modules/tracer/transport.go
@@ -1,5 +1,5 @@
 package tracer
 
 type TracerTransport interface {
-	Transport(jsonEvent []byte)
+	Transport(jsonEvent []byte) error
 }