From 5cd22b50e86a3b09cade509235120a6176de7097 Mon Sep 17 00:00:00 2001
From: Alexey Shekhirin <a.shekhirin@gmail.com>
Date: Wed, 17 Jul 2024 20:01:55 +0100
Subject: [PATCH] fix(prune): saturating subtract for genesis deposit contract
 block (#9584)

---
 crates/prune/types/src/mode.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crates/prune/types/src/mode.rs b/crates/prune/types/src/mode.rs
index d35cb66695..037e6fa496 100644
--- a/crates/prune/types/src/mode.rs
+++ b/crates/prune/types/src/mode.rs
@@ -40,7 +40,9 @@ impl PruneMode {
             }
             Self::Before(n) if *n == tip + 1 && purpose.is_static_file() => Some((tip, *self)),
             Self::Before(n) if *n > tip => None, // Nothing to prune yet
-            Self::Before(n) if tip - n >= segment.min_blocks(purpose) => Some((n - 1, *self)),
+            Self::Before(n) if tip - n >= segment.min_blocks(purpose) => {
+                Some(((*n).saturating_sub(1), *self))
+            }
             _ => return Err(PruneSegmentError::Configuration(segment)),
         };
         Ok(result)