add some batch metric

batch-submitter/drivers/sequencer/driver.go

@@ -269,6 +269,11 @@ func (d *Driver) CraftBatchTx(
 			BlockNumber:           lastBlockNumber,
 		}
 
+		d.metrics.BatchNumSequencedTxs().Set(float64(batchContext.NumSequencedTxs))
+		d.metrics.BatchNumSubsequentQueueTxs().Set(float64(batchContext.NumSubsequentQueueTxs))
+		d.metrics.BatchTimestamp().Set(float64(batchContext.Timestamp))
+		d.metrics.BatchBlockNumber().Set(float64(batchContext.BlockNumber))
+
 		contexts = append(contexts, batchContext)
 		batchParams := &AppendSequencerBatchParams{
 			ShouldStartAtElement:  shouldStartAt - d.cfg.BlockOffset,

bss-core/metrics/interface.go

@@ -41,4 +41,16 @@ type Metrics interface {
 
 	// SccRollupTimeDuration state root rollup time duration
 	SccRollupTimeDuration() prometheus.Gauge
+
+	// BatchNumSequencedTxs Number of batch sequenced transactions
+	BatchNumSequencedTxs() prometheus.Gauge
+
+	// BatchNumSubsequentQueueTxs Number of batch subsequent queue transactions
+	BatchNumSubsequentQueueTxs() prometheus.Gauge
+
+	// BatchTimestamp Timestamp of batch
+	BatchTimestamp() prometheus.Gauge
+
+	// BatchBlockNumber Block number of batch
+	BatchBlockNumber() prometheus.Gauge
 }

bss-core/metrics/metrics.go

@@ -53,6 +53,14 @@ type Base struct {
 
 	// sccRollupTimeDuration state root rollup time duration
 	sccRollupTimeDuration prometheus.Gauge
+
+	batchNumSequencedTxs prometheus.Gauge
+
+	batchNumSubsequentQueueTxs prometheus.Gauge
+
+	batchTimestamp prometheus.Gauge
+
+	batchBlockNumber prometheus.Gauge
 }
 
 func NewBase(serviceName, subServiceName string) *Base {
@@ -121,6 +129,26 @@ func NewBase(serviceName, subServiceName string) *Base {
 			Help:      "state root rollup time duration",
 			Subsystem: subsystem,
 		}),
+		batchNumSequencedTxs: promauto.NewGauge(prometheus.GaugeOpts{
+			Name:      "batch_num_sequenced_txs",
+			Help:      "Number of batch sequenced transactions",
+			Subsystem: subsystem,
+		}),
+		batchNumSubsequentQueueTxs: promauto.NewGauge(prometheus.GaugeOpts{
+			Name:      "batch_num_subsequent_queue_txs",
+			Help:      "Number of batch subsequent queue transactions",
+			Subsystem: subsystem,
+		}),
+		batchTimestamp: promauto.NewGauge(prometheus.GaugeOpts{
+			Name:      "batch_timestamp",
+			Help:      "Timestamp of batch",
+			Subsystem: subsystem,
+		}),
+		batchBlockNumber: promauto.NewGauge(prometheus.GaugeOpts{
+			Name:      "batch_block_number",
+			Help:      "Block number of batch",
+			Subsystem: subsystem,
+		}),
 	}
 }
 
@@ -187,6 +215,26 @@ func (b *Base) SccRollupTimeDuration() prometheus.Gauge {
 	return b.sccRollupTimeDuration
 }
 
+// BatchNumSequencedTxs Number of batch sequenced transactions
+func (b *Base) BatchNumSequencedTxs() prometheus.Gauge {
+	return b.batchNumSequencedTxs
+}
+
+// BatchNumSubsequentQueueTxs Number of batch subsequent queue transactions
+func (b *Base) BatchNumSubsequentQueueTxs() prometheus.Gauge {
+	return b.batchNumSubsequentQueueTxs
+}
+
+// BatchTimestamp Timestamp of batch
+func (b *Base) BatchTimestamp() prometheus.Gauge {
+	return b.batchTimestamp
+}
+
+// BatchBlockNumber Block number of batch
+func (b *Base) BatchBlockNumber() prometheus.Gauge {
+	return b.batchBlockNumber
+}
+
 // MakeSubsystemName builds the subsystem name for a group of metrics, which
 // prometheus will use to prefix all metrics in the group. If two non-empty
 // strings are provided, they are joined with an underscore. If only one