diff --git a/api/api.go b/api/api.go
index 99e40f31c..330920bf0 100644
--- a/api/api.go
+++ b/api/api.go
@@ -300,6 +300,16 @@ type SyncState struct {
 	Base   *types.TipSet
 	Target *types.TipSet
 
-	Stage  int
+	Stage  SyncStateStage
 	Height uint64
 }
+
+type SyncStateStage int
+
+const (
+	StageIdle = SyncStateStage(iota)
+	StageHeaders
+	StagePersistHeaders
+	StageMessages
+	StageSyncComplete
+)
diff --git a/chain/sync.go b/chain/sync.go
index 2645d9270..b83709387 100644
--- a/chain/sync.go
+++ b/chain/sync.go
@@ -6,6 +6,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/filecoin-project/go-lotus/api"
 	"github.com/filecoin-project/go-lotus/build"
 	"github.com/filecoin-project/go-lotus/chain/actors"
 	"github.com/filecoin-project/go-lotus/chain/address"
@@ -683,7 +684,7 @@ func (syncer *Syncer) collectChain(fts *store.FullTipSet) error {
 		return err
 	}
 
-	syncer.syncState.SetStage(StagePersistHeaders)
+	syncer.syncState.SetStage(api.StagePersistHeaders)
 
 	for _, ts := range headers {
 		for _, b := range ts.Blocks() {
@@ -693,13 +694,13 @@ func (syncer *Syncer) collectChain(fts *store.FullTipSet) error {
 		}
 	}
 
-	syncer.syncState.SetStage(StageMessages)
+	syncer.syncState.SetStage(api.StageMessages)
 
 	if err := syncer.syncMessagesAndCheckState(headers); err != nil {
 		return xerrors.Errorf("collectChain syncMessages: %w", err)
 	}
 
-	syncer.syncState.SetStage(StageSyncComplete)
+	syncer.syncState.SetStage(api.StageSyncComplete)
 
 	return nil
 }
diff --git a/chain/syncstate.go b/chain/syncstate.go
index 8f2db6314..e7452dd8e 100644
--- a/chain/syncstate.go
+++ b/chain/syncstate.go
@@ -4,26 +4,19 @@ import (
 	"fmt"
 	"sync"
 
+	"github.com/filecoin-project/go-lotus/api"
 	"github.com/filecoin-project/go-lotus/chain/types"
 )
 
-const (
-	StageIdle = iota
-	StageHeaders
-	StagePersistHeaders
-	StageMessages
-	StageSyncComplete
-)
-
-func SyncStageString(v int) string {
+func SyncStageString(v api.SyncStateStage) string {
 	switch v {
-	case StageHeaders:
+	case api.StageHeaders:
 		return "header sync"
-	case StagePersistHeaders:
+	case api.StagePersistHeaders:
 		return "persisting headers"
-	case StageMessages:
+	case api.StageMessages:
 		return "message sync"
-	case StageSyncComplete:
+	case api.StageSyncComplete:
 		return "complete"
 	default:
 		return fmt.Sprintf("<unknown: %d>", v)
@@ -34,11 +27,11 @@ type SyncerState struct {
 	lk     sync.Mutex
 	Target *types.TipSet
 	Base   *types.TipSet
-	Stage  int
+	Stage  api.SyncStateStage
 	Height uint64
 }
 
-func (ss *SyncerState) SetStage(v int) {
+func (ss *SyncerState) SetStage(v api.SyncStateStage) {
 	ss.lk.Lock()
 	defer ss.lk.Unlock()
 	ss.Stage = v
@@ -49,7 +42,7 @@ func (ss *SyncerState) Init(base, target *types.TipSet) {
 	defer ss.lk.Unlock()
 	ss.Target = target
 	ss.Base = base
-	ss.Stage = StageHeaders
+	ss.Stage = api.StageHeaders
 	ss.Height = 0
 }