From 65ed122edc7d1fc9f16af30ada2f6b8f13e48840 Mon Sep 17 00:00:00 2001
From: Joel Wetzell <jwetzell@yahoo.com>
Date: Mon, 18 Sep 2023 17:28:38 -0500
Subject: [PATCH] add method to get what tracker fields are used

---
 src/decoder.ts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/decoder.ts b/src/decoder.ts
index d4baf09..02950ae 100644
--- a/src/decoder.ts
+++ b/src/decoder.ts
@@ -111,4 +111,19 @@ export class Decoder {
     }
     return packet;
   }
+
+  getTrackerFields(): Set<string> {
+    const keys = new Set(
+      Object.values(this.trackers)
+        .map((tracker) => Object.keys(tracker))
+        .flat(1)
+    );
+
+    keys.delete('id');
+    keys.delete('has_subchunks');
+    keys.delete('data_len');
+    keys.delete('chunk_data');
+
+    return keys;
+  }
 }