From 40e49bffe4e9ecd682eb746deafd68bd088dd415 Mon Sep 17 00:00:00 2001
From: Awiteb <a@4rs.nl>
Date: Fri, 17 May 2024 18:26:37 +0300
Subject: [PATCH] fix: Overflow in utils::vault_by_index_or_name function

Fixes: https://git.4rs.nl/awiteb/lprs/issues/48
---
 src/utils.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/utils.rs b/src/utils.rs
index 61b49ee..9551236 100644
--- a/src/utils.rs
+++ b/src/utils.rs
@@ -221,7 +221,9 @@ pub fn vault_by_index_or_name<'a>(
     let parsed_index = index_or_name.parse::<usize>();
 
     let Some((index, vault)) = (if let Ok(index) = parsed_index {
-        vaults.get_mut(index - 1).map(|v| (index, v))
+        index
+            .checked_sub(1)
+            .and_then(|zeroindex| vaults.get_mut(zeroindex).map(|v| (index, v)))
     } else {
         vaults
             .iter_mut()