Replace raw subtraction w/ checked_sub (#2418)

Co-authored-by: tbro <[email protected]>
EspressoSystems · Dec 19, 2024 · f68a58e · f68a58e
1 parent 419651a
commit f68a58e
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/sequencer/src/api/sql.rs b/sequencer/src/api/sql.rs
@@ -208,7 +208,9 @@ async fn load_frontier<Mode: TransactionMode>(
 ) -> anyhow::Result<BlocksFrontier> {
     tx.get_path(
         Snapshot::<SeqTypes, BlockMerkleTree, { BlockMerkleTree::ARITY }>::Index(height),
-        height - 1,
+        height
+            .checked_sub(1)
+            .ok_or(anyhow::anyhow!("Subtract with overflow ({height})!"))?,
     )
     .await
     .context(format!("fetching frontier at height {height}"))