testutil: fixed promrated.go (#2815)

Fixing promrated.go (resolving TODOs).

category: misc
ticket: none

testutil/promrated/promrated.go

@@ -6,6 +6,7 @@ package promrated
 
 import (
 	"context"
+	"net/url"
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
@@ -27,8 +28,7 @@ type Config struct {
 // Run blocks running the promrated program until the context is canceled or a fatal error occurs.
 func Run(ctx context.Context, config Config) error {
 	log.Info(ctx, "Promrated started",
-		z.Str("rated_endpoint", config.RatedEndpoint), // TODO(corver): This may contain a password
-		z.Str("prom_auth", config.PromAuth),           // TODO(corver): This may contain a password
+		z.Str("rated_endpoint", redactURL(config.RatedEndpoint)),
 		z.Str("monitoring_addr", config.MonitoringAddr),
 	)
 
@@ -131,3 +131,13 @@ func contains(arr []string, s string) bool {
 
 	return result
 }
+
+// redactURL returns a redacted version of the given URL.
+func redactURL(val string) string {
+	u, err := url.Parse(val)
+	if err != nil {
+		return val
+	}
+
+	return u.Redacted()
+}

testutil/promrated/promrated_internal_test.go

@@ -0,0 +1,17 @@
+// Copyright © 2022-2023 Obol Labs Inc. Licensed under the terms of a Business Source License 1.1
+
+package promrated
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestRedactURL(t *testing.T) {
+	url := "https://user:password@domain.com"
+
+	redacted := redactURL(url)
+
+	require.Equal(t, "https://user:xxxxx@domain.com", redacted)
+}