From eb31150031ab95ce80f12f463336d9a1b2ac41df Mon Sep 17 00:00:00 2001
From: thesimplekid <tsk@thesimplekid.com>
Date: Mon, 3 Jul 2023 23:27:25 -0400
Subject: [PATCH] `nut08` change amount

---
 src/nuts/nut08.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/nuts/nut08.rs b/src/nuts/nut08.rs
index 0b3092b8..6c0fa611 100644
--- a/src/nuts/nut08.rs
+++ b/src/nuts/nut08.rs
@@ -40,3 +40,12 @@ pub struct MeltResponse {
     pub preimage: Option<String>,
     pub change: Option<Vec<BlindedSignature>>,
 }
+
+impl MeltResponse {
+    pub fn change_amount(&self) -> Amount {
+        match &self.change {
+            Some(change) => change.iter().map(|c| c.amount).sum(),
+            None => Amount::ZERO,
+        }
+    }
+}