podcastdistributiona/lib/billing/webhook-log.ts

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 } });
  // Only a successfully "processed" event is considered handled. Rows logged as
  // "failed" (or "skipped") must be reprocessable when the provider retries.
  return existing?.status === "processed";
}

/** 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));
}