metric with error details

op-ufm/pkg/metrics/metrics.go

 package metrics
 
 import (
+	fmt "fmt"
+	"regexp"
+	"strings"
 	"time"
 
 	"github.com/ethereum/go-ethereum/log"
@@ -77,6 +80,8 @@ var (
 	})
 )
 
+var nonAlphanumericRegex = regexp.MustCompile(`[^a-zA-Z ]+`)
+
 func RecordError(provider string, errorLabel string) {
 	if Debug {
 		log.Debug("metric inc", "m", "errors_total",
@@ -85,6 +90,14 @@ func RecordError(provider string, errorLabel string) {
 	errorsTotal.WithLabelValues(provider, errorLabel).Inc()
 }
 
+// RecordErrorDetails concats the error message to the label removing non-alpha chars
+func RecordErrorDetails(provider string, label string, err error) {
+	errClean := nonAlphanumericRegex.ReplaceAllString(err.Error(), "")
+	errClean = strings.ReplaceAll(errClean, " ", "_")
+	label = fmt.Sprintf("%s.%s", label)
+	RecordError(provider, label)
+}
+
 func RecordRPCLatency(provider string, client string, method string, latency time.Duration) {
 	if Debug {
 		log.Debug("metric set", "m", "rpc_latency",

op-ufm/pkg/provider/roundtrip.go

@@ -70,6 +70,7 @@ func (p *Provider) RoundTrip(ctx context.Context) {
 				}
 			} else {
 				log.Error("cant send transaction", "provider", p.name, "err", err)
+				metrics.RecordErrorDetails(p.name, "ethclient.SendTransaction", err)
 				return
 			}
 		} else {