fix: typo fix

storage/src/nullifier.rs

@@ -4,7 +4,7 @@ use crate::merkle_tree_public::TreeHashType;
 
 //ToDo: Update Nullifier model, when it is clear
 #[derive(Debug, Serialize, Deserialize, Clone, Default)]
-///General bullifier object
+///General nullifier object
 pub struct UTXONullifier {
     pub utxo_hash: TreeHashType,
 }

storage/src/nullifier_sparse_merkle_tree.rs

@@ -78,7 +78,7 @@ impl NullifierSparseMerkleTree {
         let is_member = self.search_item_inclusion(nullifier_hash)?;
 
         if is_member {
-            Err(monotree::Errors::new("Is a memeber"))
+            Err(monotree::Errors::new("Is a member"))
         } else {
             Ok((
                 self.tree