refactor: flattened repo structure

src/merkle/mod.rs

@@ -0,0 +1,29 @@
+use crate::Word;
+
+#[cfg(test)]
+use crate::{Felt, ZERO};
+
+pub mod merkle_path_set;
+pub mod merkle_tree;
+
+// ERRORS
+// ================================================================================================
+
+#[derive(Clone, Debug)]
+pub enum MerkleError {
+    DepthTooSmall,
+    DepthTooBig(u32),
+    NumLeavesNotPowerOfTwo(usize),
+    InvalidIndex(u32, u64),
+    InvalidDepth(u32, u32),
+    InvalidPath(Vec<Word>),
+    NodeNotInSet(u64),
+}
+
+// HELPER FUNCTIONS
+// ================================================================================================
+
+#[cfg(test)]
+const fn int_to_node(value: u64) -> Word {
+    [Felt::new(value), ZERO, ZERO, ZERO]
+}