From 705690ee8fddba8517d907183b7ddfeafb633609 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BF=97=E5=AE=87?= <hello@evanlinjin.me>
Date: Sat, 13 Jan 2024 19:57:30 +0800
Subject: [PATCH] feat(chain): make output of `SpkTxOutIndex::unused_spks`
 cloneable

This allows us to pass this to chain sources without calling
`Iterator::collect` first.
---
 crates/chain/src/spk_txout_index.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/chain/src/spk_txout_index.rs b/crates/chain/src/spk_txout_index.rs
index 8df1b119..90ee7dca 100644
--- a/crates/chain/src/spk_txout_index.rs
+++ b/crates/chain/src/spk_txout_index.rs
@@ -215,7 +215,7 @@ impl<I: Clone + Ord> SpkTxOutIndex<I> {
     /// let unused_change_spks =
     ///     txout_index.unused_spks((change_index, u32::MIN)..(change_index, u32::MAX));
     /// ```
-    pub fn unused_spks<R>(&self, range: R) -> impl DoubleEndedIterator<Item = (&I, &Script)>
+    pub fn unused_spks<R>(&self, range: R) -> impl DoubleEndedIterator<Item = (&I, &Script)> + Clone
     where
         R: RangeBounds<I>,
     {