monetix gateway

api/gateway/mntx/internal/service/monetix/metrics.go

@@ -0,0 +1,71 @@
+package monetix
+
+import (
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+var (
+	metricsOnce sync.Once
+
+	cardPayoutRequests  *prometheus.CounterVec
+	cardPayoutCallbacks *prometheus.CounterVec
+	cardPayoutLatency   *prometheus.HistogramVec
+)
+
+func initMetrics() {
+	metricsOnce.Do(func() {
+		cardPayoutRequests = promauto.NewCounterVec(prometheus.CounterOpts{
+			Namespace: "sendico",
+			Subsystem: "mntx_gateway",
+			Name:      "card_payout_requests_total",
+			Help:      "Monetix card payout submissions grouped by outcome.",
+		}, []string{"outcome"})
+
+		cardPayoutCallbacks = promauto.NewCounterVec(prometheus.CounterOpts{
+			Namespace: "sendico",
+			Subsystem: "mntx_gateway",
+			Name:      "card_payout_callbacks_total",
+			Help:      "Monetix card payout callbacks grouped by provider status.",
+		}, []string{"status"})
+
+		cardPayoutLatency = promauto.NewHistogramVec(prometheus.HistogramOpts{
+			Namespace: "sendico",
+			Subsystem: "mntx_gateway",
+			Name:      "card_payout_request_latency_seconds",
+			Help:      "Latency distribution for outbound Monetix card payout requests.",
+			Buckets:   prometheus.DefBuckets,
+		}, []string{"outcome"})
+	})
+}
+
+func observeRequest(outcome string, duration time.Duration) {
+	initMetrics()
+	outcome = strings.ToLower(strings.TrimSpace(outcome))
+	if outcome == "" {
+		outcome = "unknown"
+	}
+	if cardPayoutLatency != nil {
+		cardPayoutLatency.WithLabelValues(outcome).Observe(duration.Seconds())
+	}
+	if cardPayoutRequests != nil {
+		cardPayoutRequests.WithLabelValues(outcome).Inc()
+	}
+}
+
+// ObserveCallback records callback status for Monetix 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()
+	}
+}