Initial import of verae-middleware from zapier monorepo

src/nats/subjects.js

@@ -0,0 +1,47 @@
+/**
+ * @fileoverview NATS subject and stream name constants.
+ * @module nats/subjects
+ *
+ * See docs/architecture/nats-subjects.md for payload schemas.
+ */
+
+/**
+ * Subject strings used by publishers and consumers.
+ * @readonly
+ */
+export const SUBJECTS = Object.freeze({
+  /** Work queue: poll Verae job status */
+  JOBS_WATCH: 'verae.zapier.jobs.watch',
+  /** Terminal job outcomes */
+  JOBS_EVENTS: 'verae.zapier.jobs.events',
+  /** Work queue: HTTP POST to Zapier REST Hooks */
+  WEBHOOKS_DELIVER: 'verae.zapier.webhooks.deliver',
+  /** Optional metering stream */
+  USAGE: 'verae.zapier.usage',
+  /** Off-chain WORM / tree-node puts */
+  ARCHIVE_PUT: 'verae.archive.put',
+  /** Broadcast hash lookup to every WORM and tree node (no queue group) */
+  ARCHIVE_QUERY: 'verae.archive.query',
+});
+
+/**
+ * JetStream stream names.
+ * @readonly
+ */
+export const STREAMS = Object.freeze({
+  ZAPIER_JOBS: 'ZAPIER_JOBS',
+  ZAPIER_EVENTS: 'ZAPIER_EVENTS',
+  ZAPIER_WEBHOOKS: 'ZAPIER_WEBHOOKS',
+  ZAPIER_USAGE: 'ZAPIER_USAGE',
+});
+
+/**
+ * Durable consumer names (queue groups).
+ * @readonly
+ */
+export const CONSUMERS = Object.freeze({
+  JOB_POLLER: 'job-poller',
+  EVENT_WEBHOOK_ROUTER: 'event-webhook-router',
+  WEBHOOK_DELIVER: 'webhook-deliver',
+  USAGE_WRITER: 'usage-writer',
+});