diff --git a/TODO.md b/TODO.md
index 70d5d63f..62a45489 100644
--- a/TODO.md
+++ b/TODO.md
@@ -225,4 +225,8 @@ in another repo: event subscriber
   #[cfg(feature = "with-uuid")]
   pub use uuid::Builder as UuidBuilder;
   ```
-- [ ] get to /, when not serving a websocket, should have a simple welcome page. maybe with a button to update your wallet. 
\ No newline at end of file
+- [ ] get to /, when not serving a websocket, should have a simple welcome page. maybe with a button to update your wallet. 
+- [ ] rate limit thoughts:
+  - if someone subscribes to all pending transactions, how should that count against rate limits
+  - when those rate limits are hit, what should happen?
+  - missing pending transactions might be okay, but not missing confirmed blocks