Comprehensive admin + user dashboards (production-ready)

lib/billing/webhook-log.ts

@@ -0,0 +1,24 @@
+import { prisma } from "@/lib/db";
+
+/** True if we've already handled this provider event (idempotency). */
+export async function alreadyProcessed(eventId: string): Promise<boolean> {
+  const existing = await prisma.webhookEvent.findUnique({ where: { eventId } });
+  return !!existing;
+}
+
+/** Record a webhook delivery for the admin log (best-effort; unique on eventId). */
+export async function logWebhook(
+  provider: "stripe" | "paypal",
+  eventId: string,
+  type: string,
+  status: "processed" | "failed" | "skipped",
+  error?: string
+): Promise<void> {
+  await prisma.webhookEvent
+    .upsert({
+      where: { eventId },
+      create: { provider, eventId, type, status, error },
+      update: { status, error },
+    })
+    .catch((e) => console.error("[webhook-log] write failed", e));
+}