going somewhere.

src/util.rs

@@ -4,6 +4,8 @@ use rusqlite::{Params, Transaction};
 pub enum Error {
     SqlError(rusqlite::Error),
     InvalidDrawer(String),
+    DoubleSpendingError(String),
+    Testing(String),
 }
 
 pub type CustomResult<T, E = Error> = Result<T, E>;