Dynamic fees for bridges-v1 (#2294)

* impl backpressure in the XcmBlobHaulerAdapter

* LocalXcmQueueManager + more adapters

* OnMessageDelviered callback

* forbid mesage delivery transactions when the channel between target bridge hub and target asset hub is suspended

* pallet-xcm-bridge-hub-router

* removed commented code

* improvements and tests for palle-xcm-bridge-router

* use LocalXcmChannel in XcmBlobMessageDispatch

* new tests for logic changes in messages pallet

* tests for LocalXcmQueueSuspender

* tests for LocalXcmQueueMessageProcessor

* tests for new logic in the XcmBlobHaulerAdapter

* fix other tests in the bridge-runtime-common

* extension_reject_call_when_dispatcher_is_inactive

* benchmarks for pallet-xcm-bridge-hub-router

* get rid of redundant storage value

* add new pallet to verify-pallets-build.sh

* fixing spellcheck, clippy and rustdoc

* trigger CI

* Revert "trigger CI"

This reverts commit 48f1ba032334e3c6d8470436483736988aa060ac.

* change log target for xcm bridge router pallet

* Update modules/xcm-bridge-hub-router/src/lib.rs

Co-authored-by: Branislav Kontur <bkontur@gmail.com>

* use saturated_len where possible

* fmt

* (Suggestion) Ability to externalize configuration for `ExporterFor` (#2313)

* Ability to externalize configuration for `ExporterFor`
(Replaced `BridgedNetworkId/SiblingBridgeHubLocation` with `Bridges: ExporterFor`)

* Fix millau

* Compile fix

* Return back `BridgedNetworkId` but as optional filter

* Replaced `BaseFee` with fees from inner `Bridges: ExporterFor`

* typo

* Clippy

* Rename LocalXcmChannel to XcmChannelStatusProvider (#2319)

* Rename LocalXcmChannel to XcmChannelStatusProvider

* fmt

* added/fixed some docs

* Dynamic fees v1: report congestion status to sending chain (#2318)

* report congestion status: changes at the sending chain

* OnMessagesDelivered is back

* report congestion status: changes at the bridge hub

* moer logging

* fix? benchmarks

* spelling

* tests for XcmBlobHaulerAdapter and LocalXcmQueueManager

* tests for messages pallet

* fix typo

* rustdoc

* Update modules/messages/src/lib.rs

* apply review suggestions

* ".git/.scripts/commands/fmt/fmt.sh"

* Added `XcmBridgeHubRouterCall::report_bridge_status` encodings for AHK/P (#2350)

* Added `XcmBridgeHubRouterCall::report_bridge_status` encodings for AHK/P

* Spellcheck

* Added const for `XcmBridgeHubRouterTransactCallMaxWeight`

* Cargo.lock

* Introduced base delivery fee constants

* Congestion messages as Optional to turn on/off `supports_congestion_detection`

* Spellcheck

* Ability to externalize dest for benchmarks

* Ability to externalize dest for benchmarks

---------

Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Co-authored-by: command-bot <>

bridges/bin/millau/runtime/Cargo.toml

@@ -23,12 +23,14 @@ bp-rialto = { path = "../../../primitives/chain-rialto", default-features = fals
 bp-rialto-parachain = { path = "../../../primitives/chain-rialto-parachain", default-features = false }
 bp-runtime = { path = "../../../primitives/runtime", default-features = false }
 bp-westend = { path = "../../../primitives/chain-westend", default-features = false }
+bp-xcm-bridge-hub-router = { path = "../../../primitives/xcm-bridge-hub-router", default-features = false }
 bridge-runtime-common = { path = "../../runtime-common", default-features = false }
 pallet-bridge-grandpa = { path = "../../../modules/grandpa", default-features = false }
 pallet-bridge-messages = { path = "../../../modules/messages", default-features = false }
 pallet-bridge-parachains = { path = "../../../modules/parachains", default-features = false }
 pallet-bridge-relayers = { path = "../../../modules/relayers", default-features = false }
 pallet-shift-session-manager = { path = "../../../modules/shift-session-manager", default-features = false }
+pallet-xcm-bridge-hub-router = { path = "../../../modules/xcm-bridge-hub-router", default-features = false }
 
 # Substrate Dependencies
 
@@ -90,6 +92,7 @@ std = [
 	"bp-rialto-parachain/std",
 	"bp-runtime/std",
 	"bp-westend/std",
+	"bp-xcm-bridge-hub-router/std",
 	"bridge-runtime-common/std",
 	"codec/std",
 	"frame-executive/std",
@@ -114,6 +117,7 @@ std = [
 	"pallet-transaction-payment/std",
 	"pallet-utility/std",
 	"pallet-xcm/std",
+	"pallet-xcm-bridge-hub-router/std",
 	"scale-info/std",
 	"sp-api/std",
 	"sp-block-builder/std",
@@ -140,6 +144,7 @@ runtime-benchmarks = [
 	"pallet-bridge-parachains/runtime-benchmarks",
 	"pallet-bridge-relayers/runtime-benchmarks",
 	"pallet-xcm/runtime-benchmarks",
+	"pallet-xcm-bridge-hub-router/runtime-benchmarks",
 	"sp-runtime/runtime-benchmarks",
 	"xcm-builder/runtime-benchmarks",
 ]

bridges/bin/millau/runtime/src/lib.rs

@@ -55,6 +55,7 @@ use sp_std::prelude::*;
 #[cfg(feature = "std")]
 use sp_version::NativeVersion;
 use sp_version::RuntimeVersion;
+use xcm_builder::NetworkExportTable;
 
 // to be able to use Millau runtime in `bridge-runtime-common` tests
 pub use bridge_runtime_common;
@@ -65,8 +66,8 @@ pub use frame_support::{
 	dispatch::DispatchClass,
 	parameter_types,
 	traits::{
-		ConstBool, ConstU32, ConstU64, ConstU8, Currency, ExistenceRequirement, Imbalance,
-		KeyOwnerProofSystem,
+		ConstBool, ConstU128, ConstU32, ConstU64, ConstU8, Currency, ExistenceRequirement,
+		Imbalance, KeyOwnerProofSystem,
 	},
 	weights::{
 		constants::WEIGHT_REF_TIME_PER_SECOND, ConstantMultiplier, IdentityFee, RuntimeDbWeight,
@@ -464,6 +465,7 @@ impl pallet_bridge_messages::Config<WithRialtoMessagesInstance> for Runtime {
 		WithRialtoMessagesInstance,
 		frame_support::traits::ConstU64<100_000>,
 	>;
+	type OnMessagesDelivered = ();
 
 	type SourceHeaderChain = crate::rialto_messages::RialtoAsSourceHeaderChain;
 	type MessageDispatch = crate::rialto_messages::FromRialtoMessageDispatch;
@@ -495,6 +497,7 @@ impl pallet_bridge_messages::Config<WithRialtoParachainMessagesInstance> for Run
 		WithRialtoParachainMessagesInstance,
 		frame_support::traits::ConstU64<100_000>,
 	>;
+	type OnMessagesDelivered = ();
 
 	type SourceHeaderChain = crate::rialto_parachain_messages::RialtoParachainAsSourceHeaderChain;
 	type MessageDispatch = crate::rialto_parachain_messages::FromRialtoParachainMessageDispatch;
@@ -544,6 +547,27 @@ impl pallet_utility::Config for Runtime {
 	type WeightInfo = ();
 }
 
+// this config is totally incorrect - the pallet is not actually used at this runtime. We need
+// it only to be able to run benchmarks and make required traits (and default weights for tests).
+parameter_types! {
+	pub BridgeTable: Vec<(xcm::prelude::NetworkId, xcm::prelude::MultiLocation, Option<xcm::prelude::MultiAsset>)>
+		= vec![(xcm_config::RialtoNetwork::get(), xcm_config::TokenLocation::get(), Some((xcm_config::TokenAssetId::get(), 1_000_000_000_u128).into()))];
+}
+impl pallet_xcm_bridge_hub_router::Config for Runtime {
+	type WeightInfo = ();
+
+	type UniversalLocation = xcm_config::UniversalLocation;
+	type BridgedNetworkId = xcm_config::RialtoNetwork;
+	type Bridges = NetworkExportTable<BridgeTable>;
+
+	type BridgeHubOrigin = frame_system::EnsureRoot<AccountId>;
+	type ToBridgeHubSender = xcm_config::XcmRouter;
+	type WithBridgeHubChannel = xcm_config::EmulatedSiblingXcmpChannel;
+
+	type ByteFee = ConstU128<1_000>;
+	type FeeAsset = xcm_config::TokenAssetId;
+}
+
 construct_runtime!(
 	pub enum Runtime {
 		System: frame_system::{Pallet, Call, Config<T>, Storage, Event<T>},
@@ -582,6 +606,9 @@ construct_runtime!(
 
 		// Pallet for sending XCM.
 		XcmPallet: pallet_xcm::{Pallet, Call, Storage, Event<T>, Origin, Config<T>} = 99,
+
+		// Pallets that are not actually used here (yet?), but we need to run benchmarks on it.
+		XcmBridgeHubRouter: pallet_xcm_bridge_hub_router::{Pallet, Storage} = 200,
 	}
 );
 
@@ -654,6 +681,7 @@ mod benches {
 		[pallet_bridge_grandpa, BridgeRialtoGrandpa]
 		[pallet_bridge_parachains, ParachainsBench::<Runtime, WithRialtoParachainsInstance>]
 		[pallet_bridge_relayers, RelayersBench::<Runtime>]
+		[pallet_xcm_bridge_hub_router, XcmBridgeHubRouterBench::<Runtime>]
 	);
 }
 
@@ -980,6 +1008,7 @@ impl_runtime_apis! {
 			use pallet_bridge_messages::benchmarking::Pallet as MessagesBench;
 			use pallet_bridge_parachains::benchmarking::Pallet as ParachainsBench;
 			use pallet_bridge_relayers::benchmarking::Pallet as RelayersBench;
+			use pallet_xcm_bridge_hub_router::benchmarking::Pallet as XcmBridgeHubRouterBench;
 
 			let mut list = Vec::<BenchmarkList>::new();
 			list_benchmarks!(list, extra);
@@ -1026,6 +1055,10 @@ impl_runtime_apis! {
 				Pallet as RelayersBench,
 				Config as RelayersConfig,
 			};
+			use pallet_xcm_bridge_hub_router::benchmarking::{
+				Pallet as XcmBridgeHubRouterBench,
+				Config as XcmBridgeHubRouterConfig,
+			};
 			use rialto_messages::WithRialtoMessageBridge;
 			use rialto_parachain_messages::WithRialtoParachainMessageBridge;
 
@@ -1136,6 +1169,12 @@ impl_runtime_apis! {
 				}
 			}
 
+			impl XcmBridgeHubRouterConfig<()> for Runtime {
+				fn make_congested() {
+					xcm_config::EmulatedSiblingXcmpChannel::make_congested()
+				}
+			}
+
 			let mut batches = Vec::<BenchmarkBatch>::new();
 			let params = (&config, &whitelist);
 

bridges/bin/millau/runtime/src/rialto_messages.rs

@@ -23,10 +23,11 @@ use bridge_runtime_common::{
 	messages::{
 		self, source::TargetHeaderChainAdapter, target::SourceHeaderChainAdapter, MessageBridge,
 	},
-	messages_xcm_extension::{XcmBlobHauler, XcmBlobHaulerAdapter},
+	messages_xcm_extension::{SenderAndLane, XcmBlobHauler, XcmBlobHaulerAdapter},
 };
 use frame_support::{parameter_types, weights::Weight, RuntimeDebug};
 use pallet_bridge_relayers::WeightInfoExt as _;
+use xcm::latest::prelude::*;
 use xcm_builder::HaulBlobExporter;
 
 /// Default lane that is used to send messages to Rialto.
@@ -42,6 +43,11 @@ parameter_types! {
 	/// 2 XCM instructions is for simple `Trap(42)` program, coming through bridge
 	/// (it is prepended with `UniversalOrigin` instruction).
 	pub const WeightCredit: Weight = BASE_XCM_WEIGHT_TWICE;
+	/// Lane used by the with-Rialto bridge.
+	pub RialtoSenderAndLane: SenderAndLane = SenderAndLane::new(Here.into(), XCM_LANE);
+
+	/// Dummy message used in configuration.
+	pub DummyXcmMessage: Xcm<()> = Xcm::new();
 }
 
 /// Message payload for Millau -> Rialto messages.
@@ -66,6 +72,7 @@ pub type FromRialtoMessageDispatch =
 	bridge_runtime_common::messages_xcm_extension::XcmBlobMessageDispatch<
 		crate::xcm_config::OnMillauBlobDispatcher,
 		(),
+		(),
 	>;
 
 /// Maximal outbound payload size of Millau -> Rialto messages.
@@ -122,11 +129,13 @@ pub type ToRialtoBlobExporter = HaulBlobExporter<
 pub struct ToRialtoXcmBlobHauler;
 
 impl XcmBlobHauler for ToRialtoXcmBlobHauler {
-	type MessageSender = pallet_bridge_messages::Pallet<Runtime, WithRialtoMessagesInstance>;
+	type Runtime = Runtime;
+	type MessagesInstance = WithRialtoMessagesInstance;
+	type SenderAndLane = RialtoSenderAndLane;
 
-	fn xcm_lane() -> LaneId {
-		XCM_LANE
-	}
+	type ToSourceChainSender = crate::xcm_config::XcmRouter;
+	type CongestedMessage = DummyXcmMessage;
+	type UncongestedMessage = DummyXcmMessage;
 }
 
 impl pallet_bridge_messages::WeightInfoExt for crate::weights::RialtoMessagesWeightInfo<Runtime> {

bridges/bin/millau/runtime/src/rialto_parachain_messages.rs

@@ -25,10 +25,11 @@ use bridge_runtime_common::{
 	messages::{
 		self, source::TargetHeaderChainAdapter, target::SourceHeaderChainAdapter, MessageBridge,
 	},
-	messages_xcm_extension::{XcmBlobHauler, XcmBlobHaulerAdapter},
+	messages_xcm_extension::{SenderAndLane, XcmBlobHauler, XcmBlobHaulerAdapter},
 };
 use frame_support::{parameter_types, weights::Weight, RuntimeDebug};
 use pallet_bridge_relayers::WeightInfoExt as _;
+use xcm::latest::prelude::*;
 use xcm_builder::HaulBlobExporter;
 
 /// Default lane that is used to send messages to Rialto parachain.
@@ -44,6 +45,11 @@ parameter_types! {
 	/// 2 XCM instructions is for simple `Trap(42)` program, coming through bridge
 	/// (it is prepended with `UniversalOrigin` instruction).
 	pub const WeightCredit: Weight = BASE_XCM_WEIGHT_TWICE;
+	/// Lane used by the with-RialtoParachain bridge.
+	pub RialtoParachainSenderAndLane: SenderAndLane = SenderAndLane::new(Here.into(), XCM_LANE);
+
+	/// Dummy message used in configuration.
+	pub DummyXcmMessage: Xcm<()> = Xcm::new();
 }
 
 /// Message payload for Millau -> RialtoParachain messages.
@@ -61,6 +67,7 @@ pub type FromRialtoParachainMessageDispatch =
 	bridge_runtime_common::messages_xcm_extension::XcmBlobMessageDispatch<
 		crate::xcm_config::OnMillauBlobDispatcher,
 		(),
+		(),
 	>;
 
 /// Maximal outbound payload size of Millau -> RialtoParachain messages.
@@ -122,12 +129,13 @@ pub type ToRialtoParachainBlobExporter = HaulBlobExporter<
 pub struct ToRialtoParachainXcmBlobHauler;
 
 impl XcmBlobHauler for ToRialtoParachainXcmBlobHauler {
-	type MessageSender =
-		pallet_bridge_messages::Pallet<Runtime, WithRialtoParachainMessagesInstance>;
+	type Runtime = Runtime;
+	type MessagesInstance = WithRialtoParachainMessagesInstance;
+	type SenderAndLane = RialtoParachainSenderAndLane;
 
-	fn xcm_lane() -> LaneId {
-		XCM_LANE
-	}
+	type ToSourceChainSender = crate::xcm_config::XcmRouter;
+	type CongestedMessage = DummyXcmMessage;
+	type UncongestedMessage = DummyXcmMessage;
 }
 
 impl pallet_bridge_messages::WeightInfoExt

bridges/bin/millau/runtime/src/xcm_config.rs

@@ -42,6 +42,8 @@ parameter_types! {
 	/// chain, we make it synonymous with it and thus it is the `Here` location, which means "equivalent to
 	/// the context".
 	pub const TokenLocation: MultiLocation = Here.into_location();
+	/// Token asset identifier.
+	pub TokenAssetId: AssetId = TokenLocation::get().into();
 	/// The Millau network ID.
 	pub const ThisNetwork: NetworkId = CustomNetworkId::Millau.as_network_id();
 	/// The Rialto network ID.
@@ -98,7 +100,7 @@ parameter_types! {
 }
 
 /// The XCM router. We are not sending messages to sibling/parent/child chains here.
-pub type XcmRouter = ();
+pub type XcmRouter = EmulatedSiblingXcmpChannel;
 
 /// The barriers one of which must be passed for an XCM message to be executed.
 pub type Barrier = (
@@ -235,6 +237,38 @@ impl ExportXcm for ToRialtoOrRialtoParachainSwitchExporter {
 	}
 }
 
+/// Emulating XCMP channel with sibling chain. We don't have required infra here, at Millau,
+/// so we have to provide at least something to be able to run benchmarks.
+pub struct EmulatedSiblingXcmpChannel;
+
+impl SendXcm for EmulatedSiblingXcmpChannel {
+	type Ticket = ();
+
+	fn validate(
+		_destination: &mut Option<MultiLocation>,
+		_message: &mut Option<Xcm<()>>,
+	) -> SendResult<Self::Ticket> {
+		Ok(((), Default::default()))
+	}
+
+	fn deliver(_ticket: Self::Ticket) -> Result<XcmHash, SendError> {
+		Ok(XcmHash::default())
+	}
+}
+
+impl EmulatedSiblingXcmpChannel {
+	/// Start emulating congested channel.
+	pub fn make_congested() {
+		frame_support::storage::unhashed::put(b"EmulatedSiblingXcmpChannel.Congested", &true);
+	}
+}
+
+impl bp_xcm_bridge_hub_router::XcmChannelStatusProvider for EmulatedSiblingXcmpChannel {
+	fn is_congested() -> bool {
+		frame_support::storage::unhashed::get_or_default(b"EmulatedSiblingXcmpChannel.Congested")
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use super::*;
@@ -357,7 +391,7 @@ mod tests {
 		let dispatch_result = FromRialtoMessageDispatch::dispatch(incoming_message);
 		assert!(matches!(
 			dispatch_result.dispatch_level_result,
-			XcmBlobMessageDispatchResult::NotDispatched(_),
+			XcmBlobMessageDispatchResult::Dispatched,
 		));
 	}
 
@@ -370,7 +404,7 @@ mod tests {
 		let dispatch_result = FromRialtoMessageDispatch::dispatch(incoming_message);
 		assert!(matches!(
 			dispatch_result.dispatch_level_result,
-			XcmBlobMessageDispatchResult::NotDispatched(_),
+			XcmBlobMessageDispatchResult::Dispatched,
 		));
 	}
 }