Collect statistics about transaction explorer views

common/metrics.go

@@ -17,6 +17,7 @@ type Metrics struct {
 	RPCLatency            *prometheus.HistogramVec
 	IndexResyncErrors     *prometheus.CounterVec
 	IndexDBSize           prometheus.Gauge
+	TxExplorerRedirects   *prometheus.CounterVec
 }
 
 type Labels = prometheus.Labels
@@ -104,6 +105,14 @@ func GetMetrics(coin string) (*Metrics, error) {
 			ConstLabels: Labels{"coin": coin},
 		},
 	)
+	metrics.TxExplorerRedirects = prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name:        "blockbook_tx_explorer_views",
+			Help:        "Number of views of the transaction explorer",
+			ConstLabels: Labels{"coin": coin},
+		},
+		[]string{},
+	)
 
 	v := reflect.ValueOf(metrics)
 	for i := 0; i < v.NumField(); i++ {

server/socketio.go

@@ -128,6 +128,7 @@ func (s *SocketIoServer) Shutdown(ctx context.Context) error {
 func (s *SocketIoServer) txRedirect(w http.ResponseWriter, r *http.Request) {
 	if s.explorerURL != "" {
 		http.Redirect(w, r, s.explorerURL+r.URL.Path, 302)
+		s.metrics.TxExplorerRedirects.With(common.Labels{}).Inc()
 	}
 }