going somewhere.

src/util.rs

@@ -1,9 +1,10 @@
-use rusqlite::{Params, Transaction};
+use rusqlite::{Params, Row, Transaction};
 
 #[derive(Debug)]
 pub enum Error {
     SqlError(rusqlite::Error),
     InvalidDrawer(String),
+    InvalidAmount(String),
     InvalidPayee(String),
     DoubleSpendingError(String),
     Testing(String),
@@ -23,4 +24,15 @@ impl TransactionHelper<'_> {
     pub fn execute<P: Params>(&self, sql: &str, params: P) -> CustomResult<usize> {
         self.tx.execute(sql, params).map_err(Error::SqlError)
     }
+
+    pub fn query_row<T, P, F>(&self, sql: &str, params: P, f: F) -> CustomResult<T>
+        where
+            P: Params,
+            F: FnOnce(&Row<'_>) -> rusqlite::Result<T>, {
+        self.tx.query_row(sql, params, f).map_err(Error::SqlError)
+    }
+    //
+    // pub fn commit(&self) -> CustomResult<()> {
+    //     self.tx.commit().map_err(Error::SqlError)
+    // }
 }