Handle signer checkpoint interval check case where index is 0

nomic-io · Feb 13, 2024 · 367f39d · 367f39d
1 parent 1c3a43b
commit 367f39d
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/bitcoin/signer.rs b/src/bitcoin/signer.rs
@@ -363,7 +363,11 @@ where
             let last_signed_btc_height: Option<u64> = self
                 .client()
                 .query(|app: InnerApp| {
-                    Ok(app.bitcoin.checkpoints.get(index - 1)?.signed_at_btc_height)
+                    Ok(app
+                        .bitcoin
+                        .checkpoints
+                        .get(index.saturating_sub(1))?
+                        .signed_at_btc_height)
                 })
                 .await?
                 .map(|v| v as u64);