diff --git a/src/state/coins.rs b/src/state/coins.rs
index fa705581..16b44e87 100644
--- a/src/state/coins.rs
+++ b/src/state/coins.rs
@@ -1,3 +1,5 @@
+use std::borrow::Cow;
+
 use derivative::Derivative;
 use novasmt::ContentAddrStore;
 use stdcode::StdcodeSerializeExt;
@@ -90,4 +92,8 @@ impl<C: ContentAddrStore> CoinMapping<C> {
             self.inner.insert(count_key.0, &count.stdcode())
         }
     }
+
+    pub fn iter(&self) -> impl Iterator<Item = ([u8; 32], Cow<'_, [u8]>)> + '_{
+        self.inner.iter()
+    }
 }