From 6a5c9d7a00bfddbdf6bd279d003fefe3958dccc1 Mon Sep 17 00:00:00 2001
From: Steve Myers <steve@notmandatory.org>
Date: Mon, 4 Sep 2023 00:25:38 -0500
Subject: [PATCH] fix(esplora): use saturating_add in update_tx_graph()

This fixes overflow error when calling update_tx_graph() from update_tx_graph_without_keychain().
---
 crates/esplora/src/async_ext.rs    | 2 +-
 crates/esplora/src/blocking_ext.rs | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/crates/esplora/src/async_ext.rs b/crates/esplora/src/async_ext.rs
index 98c47253..279c8e96 100644
--- a/crates/esplora/src/async_ext.rs
+++ b/crates/esplora/src/async_ext.rs
@@ -261,7 +261,7 @@ impl EsploraAsyncExt for esplora_client::AsyncClient {
                     }
                 }
 
-                if last_index > last_active_index.map(|i| i + stop_gap as u32) {
+                if last_index > last_active_index.map(|i| i.saturating_add(stop_gap as u32)) {
                     break;
                 }
             }
diff --git a/crates/esplora/src/blocking_ext.rs b/crates/esplora/src/blocking_ext.rs
index 5220cf07..17c364ca 100644
--- a/crates/esplora/src/blocking_ext.rs
+++ b/crates/esplora/src/blocking_ext.rs
@@ -252,7 +252,7 @@ impl EsploraExt for esplora_client::BlockingClient {
                     }
                 }
 
-                if last_index > last_active_index.map(|i| i + stop_gap as u32) {
+                if last_index > last_active_index.map(|i| i.saturating_add(stop_gap as u32)) {
                     break;
                 }
             }