Aura consensus for parachains (#371)

* Update polkadot * Migrate all uses of MQC heads to merkle proofs * Mass rename `relay_parent_storage_root` * Restore parachain-system tests * Update polkadot and libp2p swarm for testing * Collapse match into an if let Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com> * Start with something * Update Substrate & Polkadot * Start to make it compile * Make it compile * Begin with something * Yep * I'm a hacker * Bring back the builder * Make it work in some way * Compile * Parachains use their own "slot" * Adds cumulus-pallet-aura * Wrap AuRa import queue to disable equivocation checking by default * Pass slot duration * Check the seal when validating a block * Adds missing file * Try to make the seal working * Fix it * Some fixes * Bring in the latest features to cleanup the code * Update and make it compile * Improve the import * Start fixing * More work * Fix fix fix * Make everything compile * Small cleanups * Rename and more docs * Docs * Fixes fixes fixes * Update rococo-parachains/src/chain_spec.rs * Update client/consensus/aura/src/lib.rs Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com> * Update client/consensus/aura/src/lib.rs Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com> * Update primitives/parachain-inherent/Cargo.toml Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com> * Update primitives/parachain-inherent/Cargo.toml * Update primitives/parachain-inherent/Cargo.toml * Update primitives/parachain-inherent/Cargo.toml Co-authored-by: Sergei Shulepov <sergei@parity.io> Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com>
2026-05-30 10:31:03 +00:00 · 2021-05-10 14:43:00 +02:00
parent 647a9e6df9
commit 8accc88e76
22 changed files with 1694 additions and 332 deletions
@@ -15,16 +15,21 @@ sp-state-machine = { git = "https://github.com/paritytech/substrate", branch = "
 sp-trie = { git = "https://github.com/paritytech/substrate", default-features = false, branch = "master" }
 sp-api = { git = "https://github.com/paritytech/substrate", branch = "master", optional = true }

+# Polkadot dependencies
+polkadot-service = { git = "https://github.com/paritytech/polkadot", optional = true, branch = "master" }
+
 # Cumulus dependencies
 cumulus-primitives-core = { path = "../core", default-features = false }

 # Other dependencies
 codec = { package = "parity-scale-codec", version = "2.0.0", default-features = false, features = [ "derive" ] }
 tracing = { version = "0.1.22", optional = true }
+async-trait = { version = "0.1.42", optional = true }

 [features]
 default = [ "std" ]
 std = [
+	"async-trait",
 	"codec/std",
 	"cumulus-primitives-core/std",
 	"sp-inherents/std",
@@ -36,4 +41,5 @@ std = [
 	"sp-runtime",
 	"sc-client-api",
 	"sp-api",
+	"polkadot-service",
 ]
@@ -26,6 +26,7 @@ use cumulus_primitives_core::{
 	},
 	InboundDownwardMessage, InboundHrmpMessage, ParaId, PersistedValidationData,
 };
+use polkadot_service::{Client, ClientHandle, ExecuteWithClient};
 use sc_client_api::Backend;
 use sp_api::ProvideRuntimeApi;
 use sp_runtime::generic::BlockId;
@@ -210,7 +211,8 @@ impl ParachainInherentData {
 		PClient: ProvideRuntimeApi<PBlock>,
 		PClient::Api: ParachainHost<PBlock>,
 	{
-		let relay_chain_state = collect_relay_storage_proof(polkadot_backend, para_id, relay_parent)?;
+		let relay_chain_state =
+			collect_relay_storage_proof(polkadot_backend, para_id, relay_parent)?;
 		let downward_messages = retrieve_dmq_contents(polkadot_client, para_id, relay_parent)?;
 		let horizontal_messages =
 			retrieve_all_inbound_hrmp_channel_contents(polkadot_client, para_id, relay_parent)?;
@@ -222,4 +224,68 @@ impl ParachainInherentData {
 			relay_chain_state,
 		})
 	}
+
+	/// Create the [`ParachainInherentData`] at the given `relay_parent`.
+	///
+	/// Returns `None` if the creation failed.
+	pub fn create_at_with_client(
+		relay_parent: PHash,
+		polkadot_client: &Client,
+		relay_chain_backend: &impl Backend<PBlock>,
+		validation_data: &PersistedValidationData,
+		para_id: ParaId,
+	) -> Option<ParachainInherentData> {
+		polkadot_client.execute_with(CreateAtWithClient {
+			relay_chain_backend,
+			validation_data,
+			para_id,
+			relay_parent,
+		})
+	}
+}
+
+#[async_trait::async_trait]
+impl sp_inherents::InherentDataProvider for ParachainInherentData {
+	fn provide_inherent_data(
+		&self,
+		inherent_data: &mut sp_inherents::InherentData,
+	) -> Result<(), sp_inherents::Error> {
+		inherent_data.put_data(crate::INHERENT_IDENTIFIER, &self)
+	}
+
+	async fn try_handle_error(
+		&self,
+		_: &sp_inherents::InherentIdentifier,
+		_: &[u8],
+	) -> Option<Result<(), sp_inherents::Error>> {
+		None
+	}
+}
+
+/// Special structure to run [`ParachainInherentData::create_at`] with a [`Client`].
+struct CreateAtWithClient<'a, B> {
+	relay_parent: PHash,
+	relay_chain_backend: &'a B,
+	validation_data: &'a PersistedValidationData,
+	para_id: ParaId,
+}
+
+impl<'a, B> ExecuteWithClient for CreateAtWithClient<'a, B>
+where
+	B: Backend<PBlock>,
+{
+	type Output = Option<ParachainInherentData>;
+
+	fn execute_with_client<Client, Api, Backend>(
+		self,
+		client: std::sync::Arc<Client>,
+	) -> Self::Output where Client: ProvideRuntimeApi<PBlock>, Client::Api: ParachainHost<PBlock> {
+		ParachainInherentData::create_at(
+			self.relay_parent,
+			&*client,
+			self.relay_chain_backend,
+			self.validation_data,
+			self.para_id,
+		)
+	}
 }