fix: some compile time errors

Only 174 errors left!

src/database/abstraction.rs

@@ -30,7 +30,7 @@ pub trait KeyValueDatabaseEngine: Send + Sync {
     fn open(config: &Config) -> Result<Self>
     where
         Self: Sized;
-    fn open_tree(&self, name: &'static str) -> Result<Arc<dyn Tree>>;
+    fn open_tree(&self, name: &'static str) -> Result<Arc<dyn KvTree>>;
     fn flush(&self) -> Result<()>;
     fn cleanup(&self) -> Result<()> {
         Ok(())
@@ -40,7 +40,7 @@ pub trait KeyValueDatabaseEngine: Send + Sync {
     }
 }
 
-pub trait KeyValueTree: Send + Sync {
+pub trait KvTree: Send + Sync {
     fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>>;
 
     fn insert(&self, key: &[u8], value: &[u8]) -> Result<()>;