complex parachain relay

Author: svyatonik

Cargo.lock

@@ -805,7 +805,7 @@ impl_runtime_apis! {
 		fn best_finalized() -> (bp_rialto::BlockNumber, bp_rialto::Hash) {
 			// the parachains finality pallet is never decoding parachain heads, so it is
 			// only done in the integration code
-			use crate::rialto_parachain_messages::RIALTO_PARACHAIN_ID;
+			use bp_rialto_parachain::RIALTO_PARACHAIN_ID;
 			let best_rialto_parachain_head = pallet_bridge_parachains::Pallet::<
 				Runtime,
 				WitRialtoParachainsInstance,

bin/millau/runtime/src/lib.rs

@@ -97,7 +97,7 @@ impl MessageBridge for WithRialtoMessageBridge {
 		bridged_to_this_conversion_rate_override: Option<FixedU128>,
 	) -> bp_millau::Balance {
 		let conversion_rate = bridged_to_this_conversion_rate_override
-			.unwrap_or_else(|| RialtoToMillauConversionRate::get());
+			.unwrap_or_else(RialtoToMillauConversionRate::get);
 		bp_millau::Balance::try_from(conversion_rate.saturating_mul_int(bridged_balance))
 			.unwrap_or(bp_millau::Balance::MAX)
 	}

bin/millau/runtime/src/rialto_messages.rs

@@ -19,7 +19,7 @@
 use crate::Runtime;
 
 use bp_messages::{
-	source_chain::{SenderOrigin, TargetHeaderChain},
+	source_chain::TargetHeaderChain,
 	target_chain::{ProvedMessages, SourceHeaderChain},
 	InboundLaneData, LaneId, Message, MessageNonce, Parameter as MessagesParameter,
 };
@@ -36,13 +36,6 @@ use scale_info::TypeInfo;
 use sp_runtime::{traits::Saturating, FixedPointNumber, FixedU128};
 use sp_std::convert::TryFrom;
 
-/// Identifier of RialtoParachain in the Rialto relay chain.
-///
-/// This identifier is not something that is declared either by Rialto or RialtoParachain. This
-/// is an identifier of registration. So in theory it may be changed. But since bridge is going
-/// to be deployed after parachain registration AND since parachain de-registration is highly
-/// likely impossible, it is fine to declare this constant here.
-pub const RIALTO_PARACHAIN_ID: u32 = 2000;
 /// Weight of 2 XCM instructions is for simple `Trap(42)` program, coming through bridge
 /// (it is prepended with `UniversalOrigin` instruction). It is used just for simplest manual
 /// tests, confirming that we don't break encoding somewhere between.
@@ -109,7 +102,7 @@ impl MessageBridge for WithRialtoParachainMessageBridge {
 		bridged_to_this_conversion_rate_override: Option<FixedU128>,
 	) -> bp_millau::Balance {
 		let conversion_rate = bridged_to_this_conversion_rate_override
-			.unwrap_or_else(|| RialtoParachainToMillauConversionRate::get());
+			.unwrap_or_else(RialtoParachainToMillauConversionRate::get);
 		bp_millau::Balance::try_from(conversion_rate.saturating_mul_int(bridged_balance))
 			.unwrap_or(bp_millau::Balance::MAX)
 	}
@@ -132,8 +125,8 @@ impl messages::ThisChainWithMessages for Millau {
 	type Call = crate::Call;
 	type Origin = crate::Origin;
 
-	fn is_message_accepted(send_origin: &Self::Origin, lane: &LaneId) -> bool {
-		(*lane == [0, 0, 0, 0] || *lane == [0, 0, 0, 1]) && send_origin.linked_account().is_some()
+	fn is_message_accepted(_send_origin: &Self::Origin, lane: &LaneId) -> bool {
+		*lane == [0, 0, 0, 0] || *lane == [0, 0, 0, 1]
 	}
 
 	fn maximal_pending_messages_at_outbound_lane() -> MessageNonce {
@@ -260,7 +253,7 @@ impl TargetHeaderChain<ToRialtoParachainMessagePayload, bp_rialto_parachain::Acc
 			bp_rialto_parachain::Header,
 			Runtime,
 			crate::WitRialtoParachainsInstance,
-		>(ParaId(RIALTO_PARACHAIN_ID), proof)
+		>(ParaId(bp_rialto_parachain::RIALTO_PARACHAIN_ID), proof)
 	}
 }
 
@@ -282,7 +275,7 @@ impl SourceHeaderChain<bp_rialto_parachain::Balance> for RialtoParachain {
 			bp_rialto_parachain::Header,
 			Runtime,
 			crate::WitRialtoParachainsInstance,
-		>(ParaId(RIALTO_PARACHAIN_ID), proof, messages_count)
+		>(ParaId(bp_rialto_parachain::RIALTO_PARACHAIN_ID), proof, messages_count)
 	}
 }
 

bin/millau/runtime/src/rialto_parachain_messages.rs

@@ -284,9 +284,6 @@ pub const WITH_MILLAU_MESSAGES_PALLET_NAME: &str = "BridgeMillauMessages";
 /// Name of the Rialto->Millau (actually DOT->KSM) conversion rate stored in the Millau runtime.
 pub const RIALTO_TO_MILLAU_CONVERSION_RATE_PARAMETER_NAME: &str = "RialtoToMillauConversionRate";
 
-/// Name of the With-Rialto parachains bridge pallet name in the Millau runtime.
-pub const BRIDGE_PARAS_PALLET_NAME: &str = "BridgeRialtoParachains";
-
 /// Name of the `MillauFinalityApi::best_finalized` runtime method.
 pub const BEST_FINALIZED_MILLAU_HEADER_METHOD: &str = "MillauFinalityApi_best_finalized";
 

primitives/chain-millau/src/lib.rs

@@ -32,6 +32,14 @@ use sp_runtime::{
 };
 use sp_std::vec::Vec;
 
+/// Identifier of RialtoParachain in the Rialto relay chain.
+///
+/// This identifier is not something that is declared either by Rialto or RialtoParachain. This
+/// is an identifier of registration. So in theory it may be changed. But since bridge is going
+/// to be deployed after parachain registration AND since parachain de-registration is highly
+/// likely impossible, it is fine to declare this constant here.
+pub const RIALTO_PARACHAIN_ID: u32 = 2000;
+
 /// Number of extra bytes (excluding size of storage value itself) of storage proof, built at
 /// RialtoParachain chain. This mostly depends on number of entries (and their density) in the
 /// storage trie. Some reserve is reserved to account future chain growth.

primitives/chain-rialto-parachain/src/lib.rs

@@ -228,6 +228,8 @@ frame_support::parameter_types! {
 pub const WITH_RIALTO_GRANDPA_PALLET_NAME: &str = "BridgeRialtoGrandpa";
 /// Name of the With-Rialto messages pallet instance that is deployed at bridged chains.
 pub const WITH_RIALTO_MESSAGES_PALLET_NAME: &str = "BridgeRialtoMessages";
+/// Name of the With-Rialto parachains bridge pallet instance that is deployed at bridged chains.
+pub const WITH_RIALTO_BRIDGE_PARAS_PALLET_NAME: &str = "BridgeRialtoParachains";
 
 /// Name of the Millau->Rialto (actually KSM->DOT) conversion rate stored in the Rialto runtime.
 pub const MILLAU_TO_RIALTO_CONVERSION_RATE_PARAMETER_NAME: &str = "MillauToRialtoConversionRate";

primitives/chain-rialto/src/lib.rs

@@ -41,6 +41,7 @@ messages-relay = { path = "../messages" }
 millau-runtime = { path = "../../bin/millau/runtime" }
 pallet-bridge-grandpa = { path = "../../modules/grandpa" }
 pallet-bridge-messages = { path = "../../modules/messages" }
+pallet-bridge-parachains = { path = "../../modules/parachains" }
 parachains-relay = { path = "../parachains" }
 relay-kusama-client = { path = "../client-kusama" }
 relay-millau-client = { path = "../client-millau" }

relays/bin-substrate/Cargo.toml

@@ -43,6 +43,15 @@ impl CliEncodeMessage for Millau {
 				},
 			)
 			.into(),
+			bridge::MILLAU_TO_RIALTO_PARACHAIN_INDEX =>
+				millau_runtime::Call::BridgeRialtoParachainMessages(
+					millau_runtime::MessagesCall::send_message {
+						lane_id: lane,
+						payload,
+						delivery_and_dispatch_fee: fee,
+					},
+				)
+				.into(),
 			_ => anyhow::bail!(
 				"Unsupported target bridge pallet with instance index: {}",
 				bridge_instance_index

relays/bin-substrate/src/chains/millau.rs

@@ -19,7 +19,10 @@
 use parachains_relay::ParachainsPipeline;
 use relay_millau_client::Millau;
 use relay_rialto_client::Rialto;
-use substrate_relay_helper::parachains_target::DirectSubmitParachainHeadsCallBuilder;
+use relay_rialto_parachain_client::RialtoParachain;
+use substrate_relay_helper::parachains::{
+	DirectSubmitParachainHeadsCallBuilder, SubstrateParachainsPipeline,
+};
 
 /// Rialto-to-Millau parachains sync description.
 #[derive(Clone, Debug)]
@@ -30,6 +33,17 @@ impl ParachainsPipeline for RialtoParachainsToMillau {
 	type TargetChain = Millau;
 }
 
+impl SubstrateParachainsPipeline for RialtoParachainsToMillau {
+	type SourceParachain = RialtoParachain;
+	type SourceRelayChain = Rialto;
+	type TargetChain = Millau;
+
+	type SubmitParachainHeadsCallBuilder = RialtoParachainsToMillauSubmitParachainHeadsCallBuilder;
+	type TransactionSignScheme = Millau;
+
+	const SOURCE_PARACHAIN_PARA_ID: u32 = bp_rialto_parachain::RIALTO_PARACHAIN_ID;
+}
+
 /// `submit_parachain_heads` call builder for Rialto-to-Millau parachains sync pipeline.
 pub type RialtoParachainsToMillauSubmitParachainHeadsCallBuilder =
 	DirectSubmitParachainHeadsCallBuilder<