fixed fee direction

api/gateway/aurora/internal/service/provider/metrics.go

@@ -0,0 +1,39 @@
+package provider
+
+import (
+	"strings"
+	"sync"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+var (
+	metricsOnce sync.Once
+
+	cardPayoutCallbacks *prometheus.CounterVec
+)
+
+func initMetrics() {
+	metricsOnce.Do(func() {
+		cardPayoutCallbacks = promauto.NewCounterVec(prometheus.CounterOpts{
+			Namespace: "sendico",
+			Subsystem: "aurora_gateway",
+			Name:      "card_payout_callbacks_total",
+			Help:      "Aurora card payout callbacks grouped by provider status.",
+		}, []string{"status"})
+	})
+}
+
+// ObserveCallback records callback status for Aurora card payouts.
+func ObserveCallback(status string) {
+	initMetrics()
+	status = strings.TrimSpace(status)
+	if status == "" {
+		status = "unknown"
+	}
+	status = strings.ToLower(status)
+	if cardPayoutCallbacks != nil {
+		cardPayoutCallbacks.WithLabelValues(status).Inc()
+	}
+}