From be0f86652d187d59aff728049a246c2296845b65 Mon Sep 17 00:00:00 2001
From: louiss72 <louiss72@users.noreply.github.com>
Date: Wed, 29 Jul 2026 03:59:40 +0800
Subject: [PATCH] Add wrong-XMR amount regression test

---
 ...ob_refunds_when_xmr_amount_is_not_exact.rs | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/swap/tests/bob_refunds_when_xmr_amount_is_not_exact.rs b/swap/tests/bob_refunds_when_xmr_amount_is_not_exact.rs
index 53ce7719a4..6286bf07b1 100644
--- a/swap/tests/bob_refunds_when_xmr_amount_is_not_exact.rs
+++ b/swap/tests/bob_refunds_when_xmr_amount_is_not_exact.rs
@@ -71,3 +71,38 @@ async fn bob_refunds_when_xmr_amount_is_not_exact() {
     })
     .await;
 }
+
+#[tokio::test]
+async fn bob_waits_for_cancel_timelock_before_allowing_btc_redeem_when_xmr_amount_is_wrong() {
+    harness::setup_test(SlowCancelConfig, None, None, |mut ctx| async move {
+        let (bob_swap, _bob_join_handle) = ctx.bob_swap().await;
+
+        let bob_swap = tokio::spawn(bob::run_until(bob_swap, |s| {
+            matches!(s, BobState::WaitingForCancelTimelockExpiration { .. })
+        }));
+
+        let alice_swap = ctx.alice_next_swap().await;
+        let alice_state = alice::run_until(
+            alice_swap,
+            |s| matches!(s, AliceState::BtcLocked { .. }),
+            FixedRate::default(),
+        )
+        .await?;
+
+        ctx.restart_alice().await;
+        let mut alice_swap = ctx.alice_next_swap().await;
+        alice_swap.state = lower_by_one_pico(alice_state);
+        let alice_swap = tokio::spawn(alice::run(alice_swap, FixedRate::default()));
+
+        let bob_state = bob_swap.await??;
+        assert!(matches!(
+            bob_state,
+            BobState::WaitingForCancelTimelockExpiration { .. }
+        ));
+
+        ctx.assert_alice_refunded(alice_swap.await??).await;
+
+        Ok::<(), anyhow::Error>(())
+    })
+    .await;
+}