babe: report equivocations (#6362)

* slots: create primitives crate for consensus slots

* offences: add method to check if an offence is unknown

* babe: initial equivocation reporting implementation

* babe: organize imports

* babe: working equivocation reporting

* babe: add slot number to equivocation proof

* session: move duplicate traits to session primitives

* babe: move equivocation stuff to its own file

* offences: fix test

* session: don't have primitives depend on frame_support

* babe: use opaque type for key owner proof

* babe: cleanup client equivocation reporting

* babe: cleanup equivocation code in pallet

* babe: allow sending signed equivocation reports

* node: fix compilation

* fix test compilation

* babe: return bool on check_equivocation_proof

* babe: add test for equivocation reporting

* babe: add more tests

* babe: add test for validate unsigned

* babe: take slot number in generate_key_ownership_proof API

* babe: add benchmark for equivocation proof checking

* session: add benchmark for membership proof checking

* offences: fix babe benchmark

* babe: add weights based on benchmark results

* babe: adjust weights after benchmarking on reference hardware

* babe: reorder checks in check_and_report_equivocation

substrate/test-utils/runtime/src/lib.rs

@@ -26,7 +26,7 @@ pub mod system;
 use sp_std::{prelude::*, marker::PhantomData};
 use codec::{Encode, Decode, Input, Error};
 
-use sp_core::{OpaqueMetadata, RuntimeDebug, ChangesTrieConfiguration};
+use sp_core::{offchain::KeyTypeId, ChangesTrieConfiguration, OpaqueMetadata, RuntimeDebug};
 use sp_application_crypto::{ed25519, sr25519, ecdsa, RuntimeAppPublic};
 use trie_db::{TrieMut, Trie};
 use sp_trie::PrefixedMemoryDB;
@@ -49,7 +49,11 @@ use sp_version::RuntimeVersion;
 pub use sp_core::hash::H256;
 #[cfg(any(feature = "std", test))]
 use sp_version::NativeVersion;
-use frame_support::{impl_outer_origin, parameter_types, weights::{Weight, RuntimeDbWeight}};
+use frame_support::{
+	impl_outer_origin, parameter_types,
+	traits::KeyOwnerProofSystem,
+	weights::{RuntimeDbWeight, Weight},
+};
 use sp_inherents::{CheckInherentsResult, InherentData};
 use cfg_if::cfg_if;
 
@@ -462,6 +466,18 @@ impl pallet_babe::Trait for Runtime {
 	// are manually adding the digests. normally in this situation you'd use
 	// pallet_babe::SameAuthoritiesForever.
 	type EpochChangeTrigger = pallet_babe::ExternalTrigger;
+
+	type KeyOwnerProofSystem = ();
+
+	type KeyOwnerProof =
+		<Self::KeyOwnerProofSystem as KeyOwnerProofSystem<(KeyTypeId, AuthorityId)>>::Proof;
+
+	type KeyOwnerIdentification = <Self::KeyOwnerProofSystem as KeyOwnerProofSystem<(
+		KeyTypeId,
+		AuthorityId,
+	)>>::IdentificationTuple;
+
+	type HandleEquivocation = ();
 }
 
 /// Adds one to the given input and returns the final result.
@@ -690,6 +706,22 @@ cfg_if! {
 				fn current_epoch_start() -> SlotNumber {
 					<pallet_babe::Module<Runtime>>::current_epoch_start()
 				}
+
+				fn submit_report_equivocation_unsigned_extrinsic(
+					_equivocation_proof: sp_consensus_babe::EquivocationProof<
+						<Block as BlockT>::Header,
+					>,
+					_key_owner_proof: sp_consensus_babe::OpaqueKeyOwnershipProof,
+				) -> Option<()> {
+					None
+				}
+
+				fn generate_key_ownership_proof(
+					_slot_number: sp_consensus_babe::SlotNumber,
+					_authority_id: sp_consensus_babe::AuthorityId,
+				) -> Option<sp_consensus_babe::OpaqueKeyOwnershipProof> {
+					None
+				}
 			}
 
 			impl sp_offchain::OffchainWorkerApi<Block> for Runtime {
@@ -916,6 +948,22 @@ cfg_if! {
 				fn current_epoch_start() -> SlotNumber {
 					<pallet_babe::Module<Runtime>>::current_epoch_start()
 				}
+
+				fn submit_report_equivocation_unsigned_extrinsic(
+					_equivocation_proof: sp_consensus_babe::EquivocationProof<
+						<Block as BlockT>::Header,
+					>,
+					_key_owner_proof: sp_consensus_babe::OpaqueKeyOwnershipProof,
+				) -> Option<()> {
+					None
+				}
+
+				fn generate_key_ownership_proof(
+					_slot_number: sp_consensus_babe::SlotNumber,
+					_authority_id: sp_consensus_babe::AuthorityId,
+				) -> Option<sp_consensus_babe::OpaqueKeyOwnershipProof> {
+					None
+				}
 			}
 
 			impl sp_offchain::OffchainWorkerApi<Block> for Runtime {