From ba96e8a8f443e313ef9e9a9d73ed9566c0fa1fcc Mon Sep 17 00:00:00 2001
From: yjh <yjh465402634@gmail.com>
Date: Thu, 2 Jun 2022 17:03:49 +0800
Subject: [PATCH] aura: export change_authorities and initialize_authorities
 (#11468)

* aura: export change_authorities and initialize_authorities

* add docs

* fix docs
---
 substrate/frame/aura/src/lib.rs | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/substrate/frame/aura/src/lib.rs b/substrate/frame/aura/src/lib.rs
index 222360dc3a..fd6882ca9f 100644
--- a/substrate/frame/aura/src/lib.rs
+++ b/substrate/frame/aura/src/lib.rs
@@ -146,7 +146,11 @@ pub mod pallet {
 }
 
 impl<T: Config> Pallet<T> {
-	fn change_authorities(new: WeakBoundedVec<T::AuthorityId, T::MaxAuthorities>) {
+	/// Change authorities.
+	///
+	/// The storage will be applied immediately.
+	/// And aura consensus log will be appended to block's log.
+	pub fn change_authorities(new: WeakBoundedVec<T::AuthorityId, T::MaxAuthorities>) {
 		<Authorities<T>>::put(&new);
 
 		let log = DigestItem::Consensus(
@@ -156,7 +160,12 @@ impl<T: Config> Pallet<T> {
 		<frame_system::Pallet<T>>::deposit_log(log);
 	}
 
-	fn initialize_authorities(authorities: &[T::AuthorityId]) {
+	/// Initial authorities.
+	///
+	/// The storage will be applied immediately.
+	///
+	/// The authorities length must be equal or less than T::MaxAuthorities.
+	pub fn initialize_authorities(authorities: &[T::AuthorityId]) {
 		if !authorities.is_empty() {
 			assert!(<Authorities<T>>::get().is_empty(), "Authorities are already initialized!");
 			let bounded = <BoundedSlice<'_, _, T::MaxAuthorities>>::try_from(authorities)