diff --git a/src/ctap2.rs b/src/ctap2.rs
index d70760a..5804a99 100644
--- a/src/ctap2.rs
+++ b/src/ctap2.rs
@@ -814,6 +814,7 @@ impl<UP: UserPresence, T: TrussedRequirements> Authenticator for crate::Authenti
         ).ok_or(Error::NoCredentials)?;
 
         info_now!("found {:?} applicable credentials", num_credentials);
+        info_now!("{:?}", &credential);
 
         // 6. process any options present
 
@@ -900,6 +901,7 @@ impl<UP: UserPresence, T: TrussedRequirements> crate::Authenticator<UP, T>
         self.state.runtime.active_get_assertion = None;
 
         if let Some(allow_list) = allow_list {
+            debug_now!("Allowlist passed, filtering");
             // we will have at most one credential, and an empty cache.
 
             for credential_id in allow_list {
@@ -917,12 +919,13 @@ impl<UP: UserPresence, T: TrussedRequirements> crate::Authenticator<UP, T>
             return None;
         } else {
             // we are only dealing with discoverable credentials.
+            debug_now!("Allowlist not passed, fetching RKs");
 
             let mut maybe_path = syscall!(self.trussed.read_dir_first(
                 Location::Internal,
                 rp_rk_dir(&rp_id_hash),
                 None,
-            )).entry.map(|entry| PathBuf::try_from(entry.file_name()).unwrap());
+            )).entry.map(|entry| PathBuf::try_from(entry.path()).unwrap());
 
             use core::str::FromStr;
             use crate::state::CachedCredential;
@@ -943,7 +946,7 @@ impl<UP: UserPresence, T: TrussedRequirements> crate::Authenticator<UP, T>
                 }
 
                 maybe_path = syscall!(self.trussed.read_dir_next())
-                    .entry.map(|entry| PathBuf::try_from(entry.file_name()).unwrap());
+                    .entry.map(|entry| PathBuf::try_from(entry.path()).unwrap());
             }
 
             let num_credentials = self.state.runtime.remaining_credentials();
diff --git a/src/dispatch.rs b/src/dispatch.rs
index 2b80cad..7cbf454 100644
--- a/src/dispatch.rs
+++ b/src/dispatch.rs
@@ -27,7 +27,7 @@ where
     UP: UserPresence,
 {
     debug_now!("handle CTAP1: remaining stack: {} bytes", msp() - 0x2000_0000);
-    debug_now!("1A SP: {:X}", msp());
+    // debug_now!("1A SP: {:X}", msp());
     match try_handle_ctap1(authenticator, data, response) {
         Ok(()) => {
             debug!("U2F response {} bytes", response.len());
@@ -41,7 +41,7 @@ where
             response.extend_from_slice(&code).ok();
         },
     }
-    debug_now!("1B SP: {:X}", msp());
+    // debug_now!("1B SP: {:X}", msp());
     debug_now!("end handle CTAP1");
 }
 
@@ -53,12 +53,12 @@ where
     UP: UserPresence,
 {
     debug_now!("handle CTAP2: remaining stack: {} bytes", msp() - 0x2000_0000);
-    debug_now!("2A SP: {:X}", msp());
+    // debug_now!("2A SP: {:X}", msp());
     if let Err(error) = try_handle_ctap2(authenticator, data, response) {
         debug_now!("CTAP2 error: {})", error);
         response.push(error).ok();
     }
-    debug_now!("2B SP: {:X}", msp());
+    // debug_now!("2B SP: {:X}", msp());
     debug_now!("end handle CTAP2");
 }
 
@@ -83,13 +83,13 @@ where
         let ctap_request = {
             let command = apdu_dispatch::Command::try_from(data)
                 .map_err(|_| Status::IncorrectDataParameter)?;
-            debug_now!("1a SP: {:X}", msp());
+            // debug_now!("1a SP: {:X}", msp());
             ctap1::Request::try_from(&command)
                 .map_err(|_| Status::IncorrectDataParameter)?
         };
         ctap1::Authenticator::call_ctap1(authenticator, &ctap_request)?
     };
-    debug_now!("1b SP: {:X}", msp());
+    // debug_now!("1b SP: {:X}", msp());
 
     ctap_response.serialize(response).ok();
     Ok(())
@@ -129,7 +129,6 @@ where
     authenticator.state.persistent.load_if_not_initialised(&mut authenticator.trussed);
 
     debug_now!("try_get CTAP2: remaining stack: {} bytes", msp() - 0x2000_0000);
-    debug_now!("size(Request): {} bytes", core::mem::size_of::<ctap2::Request>());
 
     // Goal of these nested scopes is to keep stack small.
     let ctap_request = ctap2::Request::deserialize(data)