From 074ff19dbc4b08794d3ff0c1edbfe4102ccb61ae Mon Sep 17 00:00:00 2001
From: girazoki <gorka.irazoki@gmail.com>
Date: Sat, 5 Feb 2022 12:06:44 +0100
Subject: [PATCH] maybe_total_supply in pallet-assets (#10799)
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* maybe_total_supply in pallet-assets

* Update frame/assets/src/functions.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>
---
 substrate/frame/assets/src/functions.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/substrate/frame/assets/src/functions.rs b/substrate/frame/assets/src/functions.rs
index e02cc7c8bb..73804fc832 100644
--- a/substrate/frame/assets/src/functions.rs
+++ b/substrate/frame/assets/src/functions.rs
@@ -55,7 +55,12 @@ impl<T: Config<I>, I: 'static> Pallet<T, I> {
 
 	/// Get the total supply of an asset `id`.
 	pub fn total_supply(id: T::AssetId) -> T::Balance {
-		Asset::<T, I>::get(id).map(|x| x.supply).unwrap_or_else(Zero::zero)
+		Self::maybe_total_supply(id).unwrap_or_default()
+	}
+
+	/// Get the total supply of an asset `id` if the asset exists.
+	pub fn maybe_total_supply(id: T::AssetId) -> Option<T::Balance> {
+		Asset::<T, I>::get(id).map(|x| x.supply)
 	}
 
 	pub(super) fn new_account(