Add a command to inspect sync state progress

node/impl/full.go

@@ -2,6 +2,7 @@ package impl
 
 import (
 	"context"
+
 	"github.com/filecoin-project/go-lotus/node/impl/client"
 	"github.com/filecoin-project/go-lotus/node/impl/paych"
 
@@ -23,6 +24,7 @@ type FullNodeAPI struct {
 	paych.PaychAPI
 	full.StateAPI
 	full.WalletAPI
+	full.SyncAPI
 
 	Miner *miner.Miner
 }

node/impl/full/sync.go

@@ -0,0 +1,25 @@
+package full
+
+import (
+	"context"
+
+	"github.com/filecoin-project/go-lotus/api"
+	"github.com/filecoin-project/go-lotus/chain"
+	"go.uber.org/fx"
+)
+
+type SyncAPI struct {
+	fx.In
+
+	Syncer *chain.Syncer
+}
+
+func (a *SyncAPI) SyncState(ctx context.Context) (*api.SyncState, error) {
+	ss := a.Syncer.State()
+	return &api.SyncState{
+		Base:   ss.Base,
+		Target: ss.Target,
+		Stage:  ss.Stage,
+		Height: ss.Height,
+	}, nil
+}