diff --git a/firewood/src/db.rs b/firewood/src/db.rs
index 09a0285eb..7c8c8a152 100644
--- a/firewood/src/db.rs
+++ b/firewood/src/db.rs
@@ -320,7 +320,6 @@ impl<S: ShaleStore<Node> + Send + Sync> DbRev<S> {
         &self,
         start_key: Option<K>,
     ) -> Result<merkle::MerkleKeyValueStream<'_, S>, api::Error> {
-        // TODO: get first key when start_key is None
         self.merkle
             .get_iter(start_key, self.header.kv_root)
             .map_err(|e| api::Error::InternalError(e.into()))
diff --git a/firewood/src/merkle.rs b/firewood/src/merkle.rs
index a1f4ec40d..32625192e 100644
--- a/firewood/src/merkle.rs
+++ b/firewood/src/merkle.rs
@@ -1179,12 +1179,11 @@ impl<S: ShaleStore<Node> + Send + Sync> Merkle<S> {
         self.store.flush_dirty()
     }
 
-    pub fn get_iter<K: AsRef<[u8]>>(
+    pub(crate) fn get_iter<K: AsRef<[u8]>>(
         &self,
         key: Option<K>,
         root: DiskAddress,
     ) -> Result<MerkleKeyValueStream<'_, S>, MerkleError> {
-        // TODO: if DiskAddress::is_null() ...
         Ok(MerkleKeyValueStream {
             key_state: IteratorState::new(key),
             merkle_root: root,