remove get_inner_node from public API

src/merkle/mod.rs

@@ -28,7 +28,7 @@ mod simple_smt;
 pub use simple_smt::SimpleSmt;
 
 pub(crate) mod sparse_merkle_tree;
-pub use sparse_merkle_tree::{InnerNode, LeafIndex, SMT_MAX_DEPTH, SMT_MIN_DEPTH};
+pub use sparse_merkle_tree::{LeafIndex, SMT_MAX_DEPTH, SMT_MIN_DEPTH};
 
 mod smt;
 pub use smt::{Smt, SmtKey, SmtLeaf, SMT_DEPTH};

src/merkle/simple_smt/mod.rs

@@ -1,10 +1,9 @@
 use crate::EMPTY_WORD;
 
 use super::{
-    sparse_merkle_tree::{SparseMerkleTree, SMT_MAX_DEPTH},
-    BTreeMap, BTreeSet, EmptySubtreeRoots, InnerNode, InnerNodeInfo, LeafIndex, MerkleError,
-    MerklePath, MerkleTreeDelta, NodeIndex, RpoDigest, StoreNode, TryApplyDiff, Word,
-    SMT_MIN_DEPTH,
+    sparse_merkle_tree::{InnerNode, SparseMerkleTree, SMT_MAX_DEPTH},
+    BTreeMap, BTreeSet, EmptySubtreeRoots, InnerNodeInfo, LeafIndex, MerkleError, MerklePath,
+    MerkleTreeDelta, NodeIndex, RpoDigest, StoreNode, TryApplyDiff, Word, SMT_MIN_DEPTH,
 };
 
 #[cfg(test)]
@@ -118,11 +117,6 @@ impl<const DEPTH: u8> SimpleSmt<DEPTH> {
         <Self as SparseMerkleTree<DEPTH>>::get_leaf(self, key)
     }
 
-    /// Retrieves an inner node at the given index
-    pub fn get_inner_node(&self, index: NodeIndex) -> InnerNode {
-        <Self as SparseMerkleTree<DEPTH>>::get_inner_node(self, index)
-    }
-
     /// Returns a Merkle path from the leaf node specified by the key to the root.
     ///
     /// The node itself is not included in the path.

src/merkle/simple_smt/tests.rs

@@ -4,7 +4,10 @@ use super::{
 };
 use crate::{
     hash::rpo::Rpo256,
-    merkle::{digests_to_words, int_to_leaf, int_to_node, EmptySubtreeRoots, LeafIndex},
+    merkle::{
+        digests_to_words, int_to_leaf, int_to_node, sparse_merkle_tree::SparseMerkleTree,
+        EmptySubtreeRoots, LeafIndex,
+    },
     utils::collections::Vec,
     Word,
 };

src/merkle/smt/mod.rs

@@ -6,10 +6,10 @@ use crate::hash::rpo::Rpo256;
 use crate::utils::{collections::Vec, vec};
 use crate::{Felt, EMPTY_WORD};
 
-use super::sparse_merkle_tree::SparseMerkleTree;
+use super::sparse_merkle_tree::{InnerNode, SparseMerkleTree};
 use super::{
-    BTreeMap, BTreeSet, EmptySubtreeRoots, InnerNode, LeafIndex, MerkleError, MerklePath,
-    NodeIndex, RpoDigest, Word,
+    BTreeMap, BTreeSet, EmptySubtreeRoots, LeafIndex, MerkleError, MerklePath, NodeIndex,
+    RpoDigest, Word,
 };
 
 #[cfg(test)]
@@ -95,11 +95,6 @@ impl Smt {
         <Self as SparseMerkleTree<SMT_DEPTH>>::get_leaf(self, key)
     }
 
-    /// Retrieves an inner node at the given index
-    pub fn get_inner_node(&self, index: NodeIndex) -> InnerNode {
-        <Self as SparseMerkleTree<SMT_DEPTH>>::get_inner_node(self, index)
-    }
-
     /// Returns a Merkle path from the leaf node specified by the key to the root.
     ///
     /// The node itself is not included in the path.

src/merkle/sparse_merkle_tree.rs

@@ -144,7 +144,7 @@ pub(crate) trait SparseMerkleTree<const DEPTH: u8> {
 
 #[derive(Debug, Default, Clone, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
-pub struct InnerNode {
+pub(crate) struct InnerNode {
     pub left: RpoDigest,
     pub right: RpoDigest,
 }