feat: add subset() to MerkleStore

src/merkle/merkle_tree.rs

@@ -114,6 +114,28 @@ impl MerkleTree {
         Ok(path.into())
     }
 
+    // ITERATORS
+    // --------------------------------------------------------------------------------------------
+
+    /// Returns an iterator over the leaves of this [MerkleTree].
+    pub fn leaves(&self) -> core::slice::Iter<Word> {
+        let leaves_start = self.nodes.len() / 2;
+        self.nodes[leaves_start..].iter()
+    }
+
+    /// Returns n iterator over every inner node of this [MerkleTree].
+    ///
+    /// The iterator order is unspecified.
+    pub fn inner_nodes(&self) -> InnerNodeIterator<'_> {
+        InnerNodeIterator {
+            nodes: &self.nodes,
+            index: 1, // index 0 is just padding, start at 1
+        }
+    }
+
+    // STATE MUTATORS
+    // --------------------------------------------------------------------------------------------
+
     /// Replaces the leaf at the specified index with the provided value.
     ///
     /// # Errors
@@ -149,16 +171,6 @@ impl MerkleTree {
 
         Ok(())
     }
-
-    /// Returns n iterator over every inner node of this [MerkleTree].
-    ///
-    /// The iterator order is unspecified.
-    pub fn inner_nodes(&self) -> InnerNodeIterator<'_> {
-        InnerNodeIterator {
-            nodes: &self.nodes,
-            index: 1, // index 0 is just padding, start at 1
-        }
-    }
 }
 
 // ITERATORS