Enhance consensus hook and relay chain configuration in cumulus parac…

…hain system (#786)

* fix the hook for the cumulus consensus

* back to Strictly increases

runtime/laos/src/configs/cumulus_parachain_system.rs

@@ -39,11 +39,27 @@ impl cumulus_pallet_parachain_system::Config for Runtime {
 	type XcmpMessageHandler = XcmpQueue;
 	type ReservedXcmpWeight = ReservedXcmpWeight;
 	type CheckAssociatedRelayNumber = cumulus_pallet_parachain_system::RelayNumberStrictlyIncreases;
-	type ConsensusHook = cumulus_pallet_parachain_system::ExpectParentIncluded;
+	type ConsensusHook = ConsensusHook;
 	type DmpQueue = frame_support::traits::EnqueueWithOrigin<MessageQueue, RelayOrigin>;
 	type WeightInfo = weights::cumulus_pallet_parachain_system::WeightInfo<Runtime>;
 }
 
+/// Maximum number of blocks simultaneously accepted by the Runtime, not yet included
+/// into the relay chain.
+const UNINCLUDED_SEGMENT_CAPACITY: u32 = 1;
+/// How many parachain blocks are processed by the relay chain per parent. Limits the
+/// number of blocks authored per slot.
+const BLOCK_PROCESSING_VELOCITY: u32 = 1;
+/// Relay chain slot duration, in milliseconds.
+const RELAY_CHAIN_SLOT_DURATION_MILLIS: u32 = 6000;
+
+type ConsensusHook = cumulus_pallet_aura_ext::FixedVelocityConsensusHook<
+	Runtime,
+	RELAY_CHAIN_SLOT_DURATION_MILLIS,
+	BLOCK_PROCESSING_VELOCITY,
+	UNINCLUDED_SEGMENT_CAPACITY,
+>;
+
 // This struct is never instantiated, it is only used for the `CheckInherents` implementation.
 // It will be deprecated soon:
 // https://github.com/moonbeam-foundation/moonbeam/blob/26a88a553563647992f39fbd1cce3d45a363e991/runtime/moonbeam/src/lib.rs#L1585-L1614