fix: use inner created_at timestamp nip17

packages/system/src/event-builder.ts

@@ -98,7 +98,7 @@ export class EventBuilder {
       pubkey: this.#pubkey ?? "",
       content: this.#content ?? "",
       kind: this.#kind,
-      created_at: (this.#createdAt ?? unixNow()) + (this.#jitter ? jitter(this.#jitter) : 0),
+      created_at: (this.#createdAt ?? unixNow()) - (this.#jitter ? jitter(this.#jitter) : 0),
       tags: this.#tags.sort((a, b) => a[0].localeCompare(b[0])),
     } as NostrEvent;
     ev.id = EventExt.createId(ev);

packages/system/src/event-publisher.ts

@@ -314,6 +314,7 @@ export class EventPublisher {
       eb.pow(powTarget, powMiner);
     }
     eb.content(await signer.nip44Encrypt(JSON.stringify(inner), pTag));
+    eb.jitter(60 * 60 * 24);
 
     return await eb.buildAndSign(secret);
   }