cmd/geth: better output generator status

Co-authored-by: Sina Mahmoodi <1591639+s1na@users.noreply.github.com>

cmd/geth/dbcmd.go

@@ -34,6 +34,7 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/core/rawdb"
+	"github.com/ethereum/go-ethereum/core/state/snapshot"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/trie"
@@ -243,6 +244,7 @@ WARNING: This is a low-level operation which may cause database corruption!`,
 			utils.SyncModeFlag,
 			utils.MainnetFlag,
 			utils.RopstenFlag,
+			utils.SepoliaFlag,
 			utils.RinkebyFlag,
 			utils.GoerliFlag,
 		},
@@ -730,14 +732,16 @@ func showMetaData(ctx *cli.Context) error {
 		data = append(data, []string{"headHeader.Root", fmt.Sprintf("%v", h.Root)})
 		data = append(data, []string{"headHeader.Number", fmt.Sprintf("%d (0x%x)", h.Number, h.Number)})
 	}
-	data = append(data, [][]string{{"frozen", fmt.Sprintf("%v", ancients)},
+	data = append(data, [][]string{{"frozen", fmt.Sprintf("%d items", ancients)},
 		{"lastPivotNumber", pp(rawdb.ReadLastPivotNumber(db))},
 		{"snapshotSyncStatus", fmt.Sprintf("%d bytes", len(rawdb.ReadSnapshotSyncStatus(db)))},
-		{"snapshotGenerator", fmt.Sprintf("%x", rawdb.ReadSnapshotGenerator(db))},
+		{"snapshotGenerator", snapshot.ParseGeneratorStatus(rawdb.ReadSnapshotGenerator(db))},
 		{"snapshotDisabled", fmt.Sprintf("%v", rawdb.ReadSnapshotDisabled(db))},
 		{"snapshotJournal", fmt.Sprintf("%d bytes", len(rawdb.ReadSnapshotJournal(db)))},
 		{"snapshotRecoveryNumber", pp(rawdb.ReadSnapshotRecoveryNumber(db))},
 		{"snapshotRoot", fmt.Sprintf("%v", rawdb.ReadSnapshotRoot(db))},
+		{"txIndexTail", pp(rawdb.ReadTxIndexTail(db))},
+		{"fastTxLookupLimit", pp(rawdb.ReadFastTxLookupLimit(db))},
 	}...)
 	table := tablewriter.NewWriter(os.Stdout)
 	table.SetHeader([]string{"Field", "Value"})

core/state/snapshot/journal.go

@@ -66,6 +66,29 @@ type journalStorage struct {
 	Vals [][]byte
 }
 
+func ParseGeneratorStatus(generatorBlob []byte) string {
+	if len(generatorBlob) == 0 {
+		return ""
+	}
+	var generator journalGenerator
+	if err := rlp.DecodeBytes(generatorBlob, &generator); err != nil {
+		log.Warn("failed to decode snapshot generator", "err", err)
+		return ""
+	}
+	// Figure out whether we're after or within an account
+	var m string
+	switch marker := generator.Marker; len(marker) {
+	case common.HashLength:
+		m = fmt.Sprintf("at %#x", marker)
+	case 2 * common.HashLength:
+		m = fmt.Sprintf("in %#x at %#x", marker[:common.HashLength], marker[common.HashLength:])
+	default:
+		m = fmt.Sprintf("%#x", marker)
+	}
+	return fmt.Sprintf(`Done: %v, Accounts: %d, Slots: %d, Storage: %d, Marker: %s`,
+		generator.Done, generator.Accounts, generator.Slots, generator.Storage, m)
+}
+
 // loadAndParseJournal tries to parse the snapshot journal in latest format.
 func loadAndParseJournal(db ethdb.KeyValueStore, base *diskLayer) (snapshot, journalGenerator, error) {
 	// Retrieve the disk layer generator. It must exist, no matter the