Benchmark Offences Pallet (#5411)

* Add initial report_ofence bench.

* Remove unused imports

* Style nit

* Add nominators

* Remove logs.

* Nits.

* Add nominators param.

* Reorg, comment.

* Remove whitespaces.

* Apply review suggestion: move benchmark to own crate.

* Remove import.

* Remove line.

* Add feature flag.

* Pass can_report.

* Cleaning up.

* More cleaning

substrate/frame/offences/src/lib.rs

@@ -44,7 +44,7 @@ type OpaqueTimeSlot = Vec<u8>;
 type ReportIdOf<T> = <T as frame_system::Trait>::Hash;
 
 /// Type of data stored as a deferred offence
-type DeferredOffenceOf<T> = (
+pub type DeferredOffenceOf<T> = (
 	Vec<OffenceDetails<<T as frame_system::Trait>::AccountId, <T as Trait>::IdentificationTuple>>,
 	Vec<Perbill>,
 	SessionIndex,
@@ -249,6 +249,11 @@ impl<T: Trait> Module<T> {
 			None
 		}
 	}
+
+	#[cfg(feature = "runtime-benchmarks")]
+	pub fn set_deferred_offences(offences: Vec<DeferredOffenceOf<T>>) {
+		<DeferredOffences<T>>::put(offences);
+	}
 }
 
 struct TriageOutcome<T: Trait> {