From 3cb5e43c69bb03bd7540dcda98b9ea0c0da393b2 Mon Sep 17 00:00:00 2001
From: Trubnikov Sergey <bugrazoid@yandex.ru>
Date: Thu, 07 Jul 2022 14:12:58 +0000
Subject: [PATCH] CORE-410 Implement token_owner for Refungible token


---
--- a/pallets/refungible/src/common.rs
+++ b/pallets/refungible/src/common.rs
@@ -413,8 +413,8 @@
 		TokenId(<TokensMinted<T>>::get(self.id))
 	}
 
-	fn token_owner(&self, _token: TokenId) -> Option<T::CrossAccountId> {
-		None
+	fn token_owner(&self, token: TokenId) -> Option<T::CrossAccountId> {
+		<Pallet<T>>::token_owner(self.id, token)
 	}
 
 	fn token_property(&self, _token_id: TokenId, _key: &PropertyKey) -> Option<PropertyValue> {
--- a/pallets/refungible/src/lib.rs
+++ b/pallets/refungible/src/lib.rs
@@ -1094,6 +1094,19 @@
 		Ok(())
 	}
 
+	fn token_owner(collection_id: CollectionId, token_id: TokenId) -> Option<T::CrossAccountId> {
+		let mut owner = None;
+		let mut count = 0;
+		for key in Balance::<T>::iter_key_prefix((collection_id, token_id)) {
+			count += 1;
+			if count > 1 {
+				return None;
+			}
+			owner = Some(key);
+		}
+		owner
+	}
+
 	fn total_pieces(collection_id: CollectionId, token_id: TokenId) -> Option<u128> {
 		<TotalSupply<T>>::try_get((collection_id, token_id)).ok()
 	}

-- 
gitstuff