Offence implementations can disable offenders independently from slashing (#10201)

* Offence implementations can disable offenders independently from slashing

* Fix build on CI

* Run cargo fmt

* Fixes based on review comments

* Make parameter naming consistent

* Fix migration and some English

* Fix migration - again

* cargo fmt

* Cover 2 new cases with a test

substrate/frame/offences/src/lib.rs

@@ -150,6 +150,7 @@ where
 			&concurrent_offenders,
 			&slash_perbill,
 			offence.session_index(),
+			offence.disable_strategy(),
 		);
 
 		// Deposit the event.

substrate/frame/offences/src/migration.rs

@@ -19,7 +19,7 @@ use super::{Config, OffenceDetails, Perbill, SessionIndex};
 use frame_support::{
 	generate_storage_alias, pallet_prelude::ValueQuery, traits::Get, weights::Weight,
 };
-use sp_staking::offence::OnOffenceHandler;
+use sp_staking::offence::{DisableStrategy, OnOffenceHandler};
 use sp_std::vec::Vec;
 
 /// Type of data stored as a deferred offence
@@ -41,7 +41,12 @@ pub fn remove_deferred_storage<T: Config>() -> Weight {
 	let deferred = <DeferredOffences<T>>::take();
 	log::info!(target: "runtime::offences", "have {} deferred offences, applying.", deferred.len());
 	for (offences, perbill, session) in deferred.iter() {
-		let consumed = T::OnOffenceHandler::on_offence(&offences, &perbill, *session);
+		let consumed = T::OnOffenceHandler::on_offence(
+			&offences,
+			&perbill,
+			*session,
+			DisableStrategy::WhenSlashed,
+		);
 		weight = weight.saturating_add(consumed);
 	}
 

substrate/frame/offences/src/mock.rs

@@ -36,7 +36,7 @@ use sp_runtime::{
 	Perbill,
 };
 use sp_staking::{
-	offence::{self, Kind, OffenceDetails},
+	offence::{self, DisableStrategy, Kind, OffenceDetails},
 	SessionIndex,
 };
 use std::cell::RefCell;
@@ -55,6 +55,7 @@ impl<Reporter, Offender> offence::OnOffenceHandler<Reporter, Offender, Weight>
 		_offenders: &[OffenceDetails<Reporter, Offender>],
 		slash_fraction: &[Perbill],
 		_offence_session: SessionIndex,
+		_disable_strategy: DisableStrategy,
 	) -> Weight {
 		ON_OFFENCE_PERBILL.with(|f| {
 			*f.borrow_mut() = slash_fraction.to_vec();