feat(xgon): change pending tx metric logic to singe file

sequencer/db_metric.go

@@ -0,0 +1,22 @@
+package sequencer
+
+import (
+	"github.com/0xPolygonHermez/zkevm-node/log"
+	"github.com/0xPolygonHermez/zkevm-node/sequencer/metrics"
+	"time"
+)
+
+func (d *dbManager) countPendingTx() {
+	ticker := time.NewTicker(time.Second * 10)
+	for {
+		select {
+		case <-ticker.C:
+			transactions, err := d.txPool.CountPendingTransactions(d.ctx)
+			if err != nil {
+				log.Errorf("load pending tx from pool: %v", err)
+				continue
+			}
+			metrics.PendingTxCount(int(transactions))
+		}
+	}
+}

sequencer/dbmanager.go

@@ -2,7 +2,6 @@ package sequencer
 
 import (
 	"context"
-	"github.com/0xPolygonHermez/zkevm-node/sequencer/metrics"
 	"math/big"
 	"time"
 
@@ -117,21 +116,6 @@ func (d *dbManager) checkIfReorg() {
 	}
 }
 
-func (d *dbManager) countPendingTx() {
-	ticker := time.NewTicker(time.Second * 10)
-	for {
-		select {
-		case <-ticker.C:
-			transactions, err := d.txPool.CountPendingTransactions(d.ctx)
-			if err != nil {
-				log.Errorf("load pending tx from pool: %v", err)
-				continue
-			}
-			metrics.PendingTxCount(int(transactions))
-		}
-	}
-}
-
 // loadFromPool keeps loading transactions from the pool
 func (d *dbManager) loadFromPool() {
 	for {