eventMatchesTemplate: drop `nonce` tags before comparison

src/utils.ts

@@ -107,8 +107,22 @@ function dedupeEvents<K extends number>(events: Event<K>[]): Event<K>[] {
   return [...new Map(events.map((event) => [event.id, event])).values()];
 }
 
+/** Return a copy of the event with the given tags removed. */
+function stripTags<E extends EventTemplate>(event: E, tags: string[] = []): E {
+  if (!tags.length) return event;
+  return {
+    ...event,
+    tags: event.tags.filter(([name]) => !tags.includes(name)),
+  };
+}
+
 /** Ensure the template and event match on their shared keys. */
 function eventMatchesTemplate(event: Event, template: EventTemplate): boolean {
+  const whitelist = ['nonce'];
+
+  event = stripTags(event, whitelist);
+  template = stripTags(template, whitelist);
+
   return getEventHash(event) === getEventHash({ pubkey: event.pubkey, ...template });
 }