diff --git a/crates/chain/src/tx_graph.rs b/crates/chain/src/tx_graph.rs
index a0efa47aab..47884fab66 100644
--- a/crates/chain/src/tx_graph.rs
+++ b/crates/chain/src/tx_graph.rs
@@ -1073,16 +1073,21 @@ impl<A> ChangeSet<A> {
     /// confirm or exclude these anchors.
     ///
     /// See also: [`Self::missing_heights`]
-    pub fn relevant_heights(&self) -> impl Iterator<Item=u32> + '_ where A: Anchor {
+    pub fn relevant_heights(&self) -> impl Iterator<Item = u32> + '_
+    where
+        A: Anchor,
+    {
         let mut dedup = None;
-        self.anchors.iter().map(|(a, _)| a.anchor_block().height).filter(move |height| {
-            let duplicate = dedup == Some(*height);
-            dedup = Some(*height);
-            !duplicate
-        })
+        self.anchors
+            .iter()
+            .map(|(a, _)| a.anchor_block().height)
+            .filter(move |height| {
+                let duplicate = dedup == Some(*height);
+                dedup = Some(*height);
+                !duplicate
+            })
     }
 
-
     /// Returns an iterator for the [`relevant_heights`] in this changeset that are not included in
     /// `local_chain`. This tells you which heights you need to include in `local_chain` in order
     /// for it to conclusively act as a [`ChainOracle`] for the transaction anchors this changeset
@@ -1090,8 +1095,15 @@ impl<A> ChangeSet<A> {
     ///
     /// [`ChainOracle`]: crate::ChainOracle
     /// [`relevant_heights`]: Self::relevant_heights
-    pub fn missing_heights_from<'a>(&'a self, local_chain: &'a LocalChain) -> impl Iterator<Item=u32> + 'a where A: Anchor {
-        self.relevant_heights().filter(move |height| !local_chain.blocks().contains_key(height))
+    pub fn missing_heights_from<'a>(
+        &'a self,
+        local_chain: &'a LocalChain,
+    ) -> impl Iterator<Item = u32> + 'a
+    where
+        A: Anchor,
+    {
+        self.relevant_heights()
+            .filter(move |height| !local_chain.blocks().contains_key(height))
     }
 }