rename messages_dispatch_weight -> message_details (#996)

Co-authored-by: Tomasz Drwięga <tomasz@parity.io>

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

@@ -601,17 +601,23 @@ impl_runtime_apis! {
 			).ok()
 		}
 
-		fn messages_dispatch_weight(
+		fn message_details(
 			lane: bp_messages::LaneId,
 			begin: bp_messages::MessageNonce,
 			end: bp_messages::MessageNonce,
-		) -> Vec<(bp_messages::MessageNonce, Weight, u32)> {
+		) -> Vec<bp_messages::MessageDetails<Balance>> {
 			(begin..=end).filter_map(|nonce| {
-				let encoded_payload = BridgeRialtoMessages::outbound_message_payload(lane, nonce)?;
+				let message_data = BridgeRialtoMessages::outbound_message_data(lane, nonce)?;
 				let decoded_payload = rialto_messages::ToRialtoMessagePayload::decode(
-					&mut &encoded_payload[..]
+					&mut &message_data.payload[..]
 				).ok()?;
-				Some((nonce, decoded_payload.weight, encoded_payload.len() as _))
+				Some(bp_messages::MessageDetails {
+					nonce,
+					dispatch_weight: decoded_payload.weight,
+					size: message_data.payload.len() as _,
+					delivery_and_dispatch_fee: message_data.fee,
+					// TODO: include dispatch fee type (https://github.com/paritytech/parity-bridges-common/pull/911)
+				})
 			})
 			.collect()
 		}

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

@@ -752,17 +752,23 @@ impl_runtime_apis! {
 			).ok()
 		}
 
-		fn messages_dispatch_weight(
+		fn message_details(
 			lane: bp_messages::LaneId,
 			begin: bp_messages::MessageNonce,
 			end: bp_messages::MessageNonce,
-		) -> Vec<(bp_messages::MessageNonce, Weight, u32)> {
+		) -> Vec<bp_messages::MessageDetails<Balance>> {
 			(begin..=end).filter_map(|nonce| {
-				let encoded_payload = BridgeMillauMessages::outbound_message_payload(lane, nonce)?;
+				let message_data = BridgeMillauMessages::outbound_message_data(lane, nonce)?;
 				let decoded_payload = millau_messages::ToMillauMessagePayload::decode(
-					&mut &encoded_payload[..]
+					&mut &message_data.payload[..]
 				).ok()?;
-				Some((nonce, decoded_payload.weight, encoded_payload.len() as _))
+				Some(bp_messages::MessageDetails {
+					nonce,
+					dispatch_weight: decoded_payload.weight,
+					size: message_data.payload.len() as _,
+					delivery_and_dispatch_fee: message_data.fee,
+					// TODO: include dispatch fee type (https://github.com/paritytech/parity-bridges-common/pull/911)
+				})
 			})
 			.collect()
 		}

bridges/modules/messages/src/lib.rs

@@ -49,8 +49,8 @@ use crate::weights::WeightInfo;
 use bp_messages::{
 	source_chain::{LaneMessageVerifier, MessageDeliveryAndDispatchPayment, RelayersRewards, TargetHeaderChain},
 	target_chain::{DispatchMessage, MessageDispatch, ProvedLaneMessages, ProvedMessages, SourceHeaderChain},
-	total_unrewarded_messages, InboundLaneData, LaneId, MessageData, MessageKey, MessageNonce, MessagePayload,
+	total_unrewarded_messages, InboundLaneData, LaneId, MessageData, MessageKey, MessageNonce, OperatingMode,
-	OperatingMode, OutboundLaneData, Parameter as MessagesParameter, UnrewardedRelayersState,
+	OutboundLaneData, Parameter as MessagesParameter, UnrewardedRelayersState,
 };
 use bp_runtime::Size;
 use codec::{Decode, Encode};
@@ -607,9 +607,9 @@ decl_module! {
 }
 
 impl<T: Config<I>, I: Instance> Pallet<T, I> {
-	/// Get payload of given outbound message.
+	/// Get stored data of the outbound message with given nonce.
-	pub fn outbound_message_payload(lane: LaneId, nonce: MessageNonce) -> Option<MessagePayload> {
+	pub fn outbound_message_data(lane: LaneId, nonce: MessageNonce) -> Option<MessageData<T::OutboundMessageFee>> {
-		OutboundMessages::<T, I>::get(MessageKey { lane_id: lane, nonce }).map(|message_data| message_data.payload)
+		OutboundMessages::<T, I>::get(MessageKey { lane_id: lane, nonce })
 	}
 
 	/// Get nonce of latest generated message at given outbound lane.

bridges/primitives/chain-kusama/src/lib.rs

@@ -20,7 +20,7 @@
 // Runtime-generated DecodeLimit::decode_all_with_depth_limit
 #![allow(clippy::unnecessary_mut_passed)]
 
-use bp_messages::{LaneId, MessageNonce, UnrewardedRelayersState, Weight};
+use bp_messages::{LaneId, MessageDetails, MessageNonce, UnrewardedRelayersState};
 use sp_std::prelude::*;
 
 pub use bp_polkadot_core::*;
@@ -43,8 +43,8 @@ pub const IS_KNOWN_KUSAMA_HEADER_METHOD: &str = "KusamaFinalityApi_is_known_head
 /// Name of the `ToKusamaOutboundLaneApi::estimate_message_delivery_and_dispatch_fee` runtime method.
 pub const TO_KUSAMA_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToKusamaOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
-/// Name of the `ToKusamaOutboundLaneApi::messages_dispatch_weight` runtime method.
+/// Name of the `ToKusamaOutboundLaneApi::message_details` runtime method.
-pub const TO_KUSAMA_MESSAGES_DISPATCH_WEIGHT_METHOD: &str = "ToKusamaOutboundLaneApi_messages_dispatch_weight";
+pub const TO_KUSAMA_MESSAGE_DETAILS_METHOD: &str = "ToKusamaOutboundLaneApi_message_details";
 /// Name of the `ToKusamaOutboundLaneApi::latest_generated_nonce` runtime method.
 pub const TO_KUSAMA_LATEST_GENERATED_NONCE_METHOD: &str = "ToKusamaOutboundLaneApi_latest_generated_nonce";
 /// Name of the `ToKusamaOutboundLaneApi::latest_received_nonce` runtime method.
@@ -87,15 +87,16 @@ sp_api::decl_runtime_apis! {
 			lane_id: LaneId,
 			payload: OutboundPayload,
 		) -> Option<OutboundMessageFee>;
-		/// Returns total dispatch weight and encoded payload size of all messages in given inclusive range.
+		/// Returns dispatch weight, encoded payload size and delivery+dispatch fee of all
+		/// messages in given inclusive range.
 		///
 		/// If some (or all) messages are missing from the storage, they'll also will
 		/// be missing from the resulting vector. The vector is ordered by the nonce.
-		fn messages_dispatch_weight(
+		fn message_details(
 			lane: LaneId,
 			begin: MessageNonce,
 			end: MessageNonce,
-		) -> Vec<(MessageNonce, Weight, u32)>;
+		) -> Vec<MessageDetails<OutboundMessageFee>>;
 		/// Returns nonce of the latest message, received by bridged chain.
 		fn latest_received_nonce(lane: LaneId) -> MessageNonce;
 		/// Returns nonce of the latest message, generated by given lane.

bridges/primitives/chain-millau/src/lib.rs

@@ -22,7 +22,7 @@
 
 mod millau_hash;
 
-use bp_messages::{LaneId, MessageNonce, UnrewardedRelayersState};
+use bp_messages::{LaneId, MessageDetails, MessageNonce, UnrewardedRelayersState};
 use bp_runtime::Chain;
 use frame_support::{
 	weights::{constants::WEIGHT_PER_SECOND, DispatchClass, Weight},
@@ -244,8 +244,8 @@ pub const BEST_FINALIZED_MILLAU_HEADER_METHOD: &str = "MillauFinalityApi_best_fi
 /// Name of the `ToMillauOutboundLaneApi::estimate_message_delivery_and_dispatch_fee` runtime method.
 pub const TO_MILLAU_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToMillauOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
-/// Name of the `ToMillauOutboundLaneApi::messages_dispatch_weight` runtime method.
+/// Name of the `ToMillauOutboundLaneApi::message_details` runtime method.
-pub const TO_MILLAU_MESSAGES_DISPATCH_WEIGHT_METHOD: &str = "ToMillauOutboundLaneApi_messages_dispatch_weight";
+pub const TO_MILLAU_MESSAGE_DETAILS_METHOD: &str = "ToMillauOutboundLaneApi_message_details";
 /// Name of the `ToMillauOutboundLaneApi::latest_received_nonce` runtime method.
 pub const TO_MILLAU_LATEST_RECEIVED_NONCE_METHOD: &str = "ToMillauOutboundLaneApi_latest_received_nonce";
 /// Name of the `ToMillauOutboundLaneApi::latest_generated_nonce` runtime method.
@@ -288,15 +288,16 @@ sp_api::decl_runtime_apis! {
 			lane_id: LaneId,
 			payload: OutboundPayload,
 		) -> Option<OutboundMessageFee>;
-		/// Returns total dispatch weight and encoded payload size of all messages in given inclusive range.
+		/// Returns dispatch weight, encoded payload size and delivery+dispatch fee of all
+		/// messages in given inclusive range.
 		///
 		/// If some (or all) messages are missing from the storage, they'll also will
 		/// be missing from the resulting vector. The vector is ordered by the nonce.
-		fn messages_dispatch_weight(
+		fn message_details(
 			lane: LaneId,
 			begin: MessageNonce,
 			end: MessageNonce,
-		) -> Vec<(MessageNonce, Weight, u32)>;
+		) -> Vec<MessageDetails<OutboundMessageFee>>;
 		/// Returns nonce of the latest message, received by bridged chain.
 		fn latest_received_nonce(lane: LaneId) -> MessageNonce;
 		/// Returns nonce of the latest message, generated by given lane.

bridges/primitives/chain-polkadot/src/lib.rs

@@ -20,7 +20,7 @@
 // Runtime-generated DecodeLimit::decode_all_with_depth_limit
 #![allow(clippy::unnecessary_mut_passed)]
 
-use bp_messages::{LaneId, MessageNonce, UnrewardedRelayersState, Weight};
+use bp_messages::{LaneId, MessageDetails, MessageNonce, UnrewardedRelayersState};
 use sp_std::prelude::*;
 
 pub use bp_polkadot_core::*;
@@ -43,8 +43,8 @@ pub const IS_KNOWN_POLKADOT_HEADER_METHOD: &str = "PolkadotFinalityApi_is_known_
 /// Name of the `ToPolkadotOutboundLaneApi::estimate_message_delivery_and_dispatch_fee` runtime method.
 pub const TO_POLKADOT_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToPolkadotOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
-/// Name of the `ToPolkadotOutboundLaneApi::messages_dispatch_weight` runtime method.
+/// Name of the `ToPolkadotOutboundLaneApi::message_details` runtime method.
-pub const TO_POLKADOT_MESSAGES_DISPATCH_WEIGHT_METHOD: &str = "ToPolkadotOutboundLaneApi_messages_dispatch_weight";
+pub const TO_POLKADOT_MESSAGE_DETAILS_METHOD: &str = "ToPolkadotOutboundLaneApi_message_details";
 /// Name of the `ToPolkadotOutboundLaneApi::latest_generated_nonce` runtime method.
 pub const TO_POLKADOT_LATEST_GENERATED_NONCE_METHOD: &str = "ToPolkadotOutboundLaneApi_latest_generated_nonce";
 /// Name of the `ToPolkadotOutboundLaneApi::latest_received_nonce` runtime method.
@@ -87,15 +87,16 @@ sp_api::decl_runtime_apis! {
 			lane_id: LaneId,
 			payload: OutboundPayload,
 		) -> Option<OutboundMessageFee>;
-		/// Returns total dispatch weight and encoded payload size of all messages in given inclusive range.
+		/// Returns dispatch weight, encoded payload size and delivery+dispatch fee of all
+		/// messages in given inclusive range.
 		///
 		/// If some (or all) messages are missing from the storage, they'll also will
 		/// be missing from the resulting vector. The vector is ordered by the nonce.
-		fn messages_dispatch_weight(
+		fn message_details(
 			lane: LaneId,
 			begin: MessageNonce,
 			end: MessageNonce,
-		) -> Vec<(MessageNonce, Weight, u32)>;
+		) -> Vec<MessageDetails<OutboundMessageFee>>;
 		/// Returns nonce of the latest message, received by bridged chain.
 		fn latest_received_nonce(lane: LaneId) -> MessageNonce;
 		/// Returns nonce of the latest message, generated by given lane.

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

@@ -20,7 +20,7 @@
 // Runtime-generated DecodeLimit::decode_all_With_depth_limit
 #![allow(clippy::unnecessary_mut_passed)]
 
-use bp_messages::{LaneId, MessageNonce, UnrewardedRelayersState};
+use bp_messages::{LaneId, MessageDetails, MessageNonce, UnrewardedRelayersState};
 use bp_runtime::Chain;
 use frame_support::{
 	weights::{constants::WEIGHT_PER_SECOND, DispatchClass, Weight},
@@ -205,8 +205,8 @@ pub const BEST_FINALIZED_RIALTO_HEADER_METHOD: &str = "RialtoFinalityApi_best_fi
 /// Name of the `ToRialtoOutboundLaneApi::estimate_message_delivery_and_dispatch_fee` runtime method.
 pub const TO_RIALTO_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToRialtoOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
-/// Name of the `ToRialtoOutboundLaneApi::messages_dispatch_weight` runtime method.
+/// Name of the `ToRialtoOutboundLaneApi::message_details` runtime method.
-pub const TO_RIALTO_MESSAGES_DISPATCH_WEIGHT_METHOD: &str = "ToRialtoOutboundLaneApi_messages_dispatch_weight";
+pub const TO_RIALTO_MESSAGE_DETAILS_METHOD: &str = "ToRialtoOutboundLaneApi_message_details";
 /// Name of the `ToRialtoOutboundLaneApi::latest_generated_nonce` runtime method.
 pub const TO_RIALTO_LATEST_GENERATED_NONCE_METHOD: &str = "ToRialtoOutboundLaneApi_latest_generated_nonce";
 /// Name of the `ToRialtoOutboundLaneApi::latest_received_nonce` runtime method.
@@ -249,15 +249,16 @@ sp_api::decl_runtime_apis! {
 			lane_id: LaneId,
 			payload: OutboundPayload,
 		) -> Option<OutboundMessageFee>;
-		/// Returns total dispatch weight and encoded payload size of all messages in given inclusive range.
+		/// Returns dispatch weight, encoded payload size and delivery+dispatch fee of all
+		/// messages in given inclusive range.
 		///
 		/// If some (or all) messages are missing from the storage, they'll also will
 		/// be missing from the resulting vector. The vector is ordered by the nonce.
-		fn messages_dispatch_weight(
+		fn message_details(
 			lane: LaneId,
 			begin: MessageNonce,
 			end: MessageNonce,
-		) -> Vec<(MessageNonce, Weight, u32)>;
+		) -> Vec<MessageDetails<OutboundMessageFee>>;
 		/// Returns nonce of the latest message, received by bridged chain.
 		fn latest_received_nonce(lane: LaneId) -> MessageNonce;
 		/// Returns nonce of the latest message, generated by given lane.

bridges/primitives/chain-rococo/src/lib.rs

@@ -20,7 +20,7 @@
 // Runtime-generated DecodeLimit::decode_all_with_depth_limit
 #![allow(clippy::unnecessary_mut_passed)]
 
-use bp_messages::{LaneId, MessageNonce, UnrewardedRelayersState, Weight};
+use bp_messages::{LaneId, MessageDetails, MessageNonce, UnrewardedRelayersState};
 use bp_runtime::Chain;
 use sp_std::prelude::*;
 use sp_version::RuntimeVersion;
@@ -91,8 +91,8 @@ pub const IS_KNOWN_ROCOCO_HEADER_METHOD: &str = "RococoFinalityApi_is_known_head
 /// Name of the `ToRococoOutboundLaneApi::estimate_message_delivery_and_dispatch_fee` runtime method.
 pub const TO_ROCOCO_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToRococoOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
-/// Name of the `ToRococoOutboundLaneApi::messages_dispatch_weight` runtime method.
+/// Name of the `ToRococoOutboundLaneApi::message_details` runtime method.
-pub const TO_ROCOCO_MESSAGES_DISPATCH_WEIGHT_METHOD: &str = "ToRococoOutboundLaneApi_messages_dispatch_weight";
+pub const TO_ROCOCO_MESSAGE_DETAILS_METHOD: &str = "ToRococoOutboundLaneApi_message_details";
 /// Name of the `ToRococoOutboundLaneApi::latest_generated_nonce` runtime method.
 pub const TO_ROCOCO_LATEST_GENERATED_NONCE_METHOD: &str = "ToRococoOutboundLaneApi_latest_generated_nonce";
 /// Name of the `ToRococoOutboundLaneApi::latest_received_nonce` runtime method.
@@ -135,15 +135,16 @@ sp_api::decl_runtime_apis! {
 			lane_id: LaneId,
 			payload: OutboundPayload,
 		) -> Option<OutboundMessageFee>;
-		/// Returns total dispatch weight and encoded payload size of all messages in given inclusive range.
+		/// Returns dispatch weight, encoded payload size and delivery+dispatch fee of all
+		/// messages in given inclusive range.
 		///
 		/// If some (or all) messages are missing from the storage, they'll also will
 		/// be missing from the resulting vector. The vector is ordered by the nonce.
-		fn messages_dispatch_weight(
+		fn message_details(
 			lane: LaneId,
 			begin: MessageNonce,
 			end: MessageNonce,
-		) -> Vec<(MessageNonce, Weight, u32)>;
+		) -> Vec<MessageDetails<OutboundMessageFee>>;
 		/// Returns nonce of the latest message, received by bridged chain.
 		fn latest_received_nonce(lane: LaneId) -> MessageNonce;
 		/// Returns nonce of the latest message, generated by given lane.

bridges/primitives/chain-westend/src/lib.rs

@@ -20,7 +20,7 @@
 // Runtime-generated DecodeLimit::decode_all_with_depth_limit
 #![allow(clippy::unnecessary_mut_passed)]
 
-use bp_messages::{LaneId, MessageNonce, UnrewardedRelayersState, Weight};
+use bp_messages::{LaneId, MessageDetails, MessageNonce, UnrewardedRelayersState};
 use bp_runtime::Chain;
 use sp_std::prelude::*;
 use sp_version::RuntimeVersion;
@@ -98,8 +98,8 @@ pub const IS_KNOWN_WESTEND_HEADER_METHOD: &str = "WestendFinalityApi_is_known_he
 /// Name of the `ToWestendOutboundLaneApi::estimate_message_delivery_and_dispatch_fee` runtime method.
 pub const TO_WESTEND_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToWestendOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
-/// Name of the `ToWestendOutboundLaneApi::messages_dispatch_weight` runtime method.
+/// Name of the `ToWestendOutboundLaneApi::message_details` runtime method.
-pub const TO_WESTEND_MESSAGES_DISPATCH_WEIGHT_METHOD: &str = "ToWestendOutboundLaneApi_messages_dispatch_weight";
+pub const TO_WESTEND_MESSAGE_DETAILS_METHOD: &str = "ToWestendOutboundLaneApi_message_details";
 /// Name of the `ToWestendOutboundLaneApi::latest_generated_nonce` runtime method.
 pub const TO_WESTEND_LATEST_GENERATED_NONCE_METHOD: &str = "ToWestendOutboundLaneApi_latest_generated_nonce";
 /// Name of the `ToWestendOutboundLaneApi::latest_received_nonce` runtime method.
@@ -149,15 +149,16 @@ sp_api::decl_runtime_apis! {
 			lane_id: LaneId,
 			payload: OutboundPayload,
 		) -> Option<OutboundMessageFee>;
-		/// Returns total dispatch weight and encoded payload size of all messages in given inclusive range.
+		/// Returns dispatch weight, encoded payload size and delivery+dispatch fee of all
+		/// messages in given inclusive range.
 		///
 		/// If some (or all) messages are missing from the storage, they'll also will
 		/// be missing from the resulting vector. The vector is ordered by the nonce.
-		fn messages_dispatch_weight(
+		fn message_details(
 			lane: LaneId,
 			begin: MessageNonce,
 			end: MessageNonce,
-		) -> Vec<(MessageNonce, Weight, u32)>;
+		) -> Vec<MessageDetails<OutboundMessageFee>>;
 		/// Returns nonce of the latest message, received by bridged chain.
 		fn latest_received_nonce(lane: LaneId) -> MessageNonce;
 		/// Returns nonce of the latest message, generated by given lane.

bridges/primitives/chain-wococo/src/lib.rs

@@ -20,7 +20,7 @@
 // Runtime-generated DecodeLimit::decode_all_with_depth_limit
 #![allow(clippy::unnecessary_mut_passed)]
 
-use bp_messages::{LaneId, MessageNonce, UnrewardedRelayersState, Weight};
+use bp_messages::{LaneId, MessageDetails, MessageNonce, UnrewardedRelayersState};
 use bp_runtime::Chain;
 use sp_std::prelude::*;
 use sp_version::RuntimeVersion;
@@ -98,8 +98,8 @@ pub const IS_KNOWN_WOCOCO_HEADER_METHOD: &str = "WococoFinalityApi_is_known_head
 /// Name of the `ToWococoOutboundLaneApi::estimate_message_delivery_and_dispatch_fee` runtime method.
 pub const TO_WOCOCO_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToWococoOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
-/// Name of the `ToWococoOutboundLaneApi::messages_dispatch_weight` runtime method.
+/// Name of the `ToWococoOutboundLaneApi::message_details` runtime method.
-pub const TO_WOCOCO_MESSAGES_DISPATCH_WEIGHT_METHOD: &str = "ToWococoOutboundLaneApi_messages_dispatch_weight";
+pub const TO_WOCOCO_MESSAGE_DETAILS_METHOD: &str = "ToWococoOutboundLaneApi_message_details";
 /// Name of the `ToWococoOutboundLaneApi::latest_generated_nonce` runtime method.
 pub const TO_WOCOCO_LATEST_GENERATED_NONCE_METHOD: &str = "ToWococoOutboundLaneApi_latest_generated_nonce";
 /// Name of the `ToWococoOutboundLaneApi::latest_received_nonce` runtime method.
@@ -142,15 +142,16 @@ sp_api::decl_runtime_apis! {
 			lane_id: LaneId,
 			payload: OutboundPayload,
 		) -> Option<OutboundMessageFee>;
-		/// Returns total dispatch weight and encoded payload size of all messages in given inclusive range.
+		/// Returns dispatch weight, encoded payload size and delivery+dispatch fee of all
+		/// messages in given inclusive range.
 		///
 		/// If some (or all) messages are missing from the storage, they'll also will
 		/// be missing from the resulting vector. The vector is ordered by the nonce.
-		fn messages_dispatch_weight(
+		fn message_details(
 			lane: LaneId,
 			begin: MessageNonce,
 			end: MessageNonce,
-		) -> Vec<(MessageNonce, Weight, u32)>;
+		) -> Vec<MessageDetails<OutboundMessageFee>>;
 		/// Returns nonce of the latest message, received by bridged chain.
 		fn latest_received_nonce(lane: LaneId) -> MessageNonce;
 		/// Returns nonce of the latest message, generated by given lane.

bridges/primitives/messages/src/lib.rs

@@ -163,6 +163,19 @@ impl<RelayerId> InboundLaneData<RelayerId> {
 	}
 }
 
+/// Message details, returned by runtime APIs.
+#[derive(Clone, Default, Encode, Decode, RuntimeDebug, PartialEq, Eq)]
+pub struct MessageDetails<OutboundMessageFee> {
+	/// Nonce assigned to the message.
+	pub nonce: MessageNonce,
+	/// Message dispatch weight, declared by the submitter.
+	pub dispatch_weight: Weight,
+	/// Size of the encoded message.
+	pub size: u32,
+	/// Delivery+dispatch fee paid by the message submitter at the source chain.
+	pub delivery_and_dispatch_fee: OutboundMessageFee,
+}
+
 /// Gist of `InboundLaneData::relayers` field used by runtime APIs.
 #[derive(Clone, Default, Encode, Decode, RuntimeDebug, PartialEq, Eq)]
 pub struct UnrewardedRelayersState {

bridges/relays/bin-substrate/src/chains/millau_messages_to_rialto.rs

@@ -42,8 +42,7 @@ pub type MillauMessagesToRialto =
 	SubstrateMessageLaneToSubstrate<Millau, MillauSigningParams, Rialto, RialtoSigningParams>;
 
 impl SubstrateMessageLane for MillauMessagesToRialto {
-	const OUTBOUND_LANE_MESSAGES_DISPATCH_WEIGHT_METHOD: &'static str =
+	const OUTBOUND_LANE_MESSAGE_DETAILS_METHOD: &'static str = bp_rialto::TO_RIALTO_MESSAGE_DETAILS_METHOD;
-		bp_rialto::TO_RIALTO_MESSAGES_DISPATCH_WEIGHT_METHOD;
 	const OUTBOUND_LANE_LATEST_GENERATED_NONCE_METHOD: &'static str =
 		bp_rialto::TO_RIALTO_LATEST_GENERATED_NONCE_METHOD;
 	const OUTBOUND_LANE_LATEST_RECEIVED_NONCE_METHOD: &'static str = bp_rialto::TO_RIALTO_LATEST_RECEIVED_NONCE_METHOD;

bridges/relays/bin-substrate/src/chains/rialto_messages_to_millau.rs

@@ -42,8 +42,7 @@ pub type RialtoMessagesToMillau =
 	SubstrateMessageLaneToSubstrate<Rialto, RialtoSigningParams, Millau, MillauSigningParams>;
 
 impl SubstrateMessageLane for RialtoMessagesToMillau {
-	const OUTBOUND_LANE_MESSAGES_DISPATCH_WEIGHT_METHOD: &'static str =
+	const OUTBOUND_LANE_MESSAGE_DETAILS_METHOD: &'static str = bp_millau::TO_MILLAU_MESSAGE_DETAILS_METHOD;
-		bp_millau::TO_MILLAU_MESSAGES_DISPATCH_WEIGHT_METHOD;
 	const OUTBOUND_LANE_LATEST_GENERATED_NONCE_METHOD: &'static str =
 		bp_millau::TO_MILLAU_LATEST_GENERATED_NONCE_METHOD;
 	const OUTBOUND_LANE_LATEST_RECEIVED_NONCE_METHOD: &'static str = bp_millau::TO_MILLAU_LATEST_RECEIVED_NONCE_METHOD;

bridges/relays/bin-substrate/src/messages_lane.rs

@@ -49,7 +49,7 @@ pub struct MessagesRelayParams<SC: Chain, SS, TC: Chain, TS> {
 /// Message sync pipeline for Substrate <-> Substrate relays.
 pub trait SubstrateMessageLane: MessageLane {
 	/// Name of the runtime method that returns dispatch weight of outbound messages at the source chain.
-	const OUTBOUND_LANE_MESSAGES_DISPATCH_WEIGHT_METHOD: &'static str;
+	const OUTBOUND_LANE_MESSAGE_DETAILS_METHOD: &'static str;
 	/// Name of the runtime method that returns latest generated nonce at the source chain.
 	const OUTBOUND_LANE_LATEST_GENERATED_NONCE_METHOD: &'static str;
 	/// Name of the runtime method that returns latest received (confirmed) nonce at the the source chain.

bridges/relays/bin-substrate/src/messages_source.rs

@@ -176,13 +176,13 @@ where
 		let encoded_response = self
 			.client
 			.state_call(
-				P::OUTBOUND_LANE_MESSAGES_DISPATCH_WEIGHT_METHOD.into(),
+				P::OUTBOUND_LANE_MESSAGE_DETAILS_METHOD.into(),
 				Bytes((self.lane_id, nonces.start(), nonces.end()).encode()),
 				Some(id.1),
 			)
 			.await?;
 
-		make_message_weights_map::<C>(
+		make_message_details_map::<C>(
 			Decode::decode(&mut &encoded_response.0[..]).map_err(SubstrateError::ResponseParseFailed)?,
 			nonces,
 		)
@@ -287,8 +287,8 @@ where
 	})
 }
 
-fn make_message_weights_map<C: Chain>(
+fn make_message_details_map<C: Chain>(
-	weights: Vec<(MessageNonce, Weight, u32)>,
+	weights: Vec<bp_messages::MessageDetails<C::Balance>>,
 	nonces: RangeInclusive<MessageNonce>,
 ) -> Result<MessageWeightsMap, SubstrateError> {
 	let make_missing_nonce_error = |expected_nonce| {
@@ -308,7 +308,7 @@ fn make_message_weights_map<C: Chain>(
 	// check if last nonce is missing - loop below is not checking this
 	let last_nonce_is_missing = weights
 		.last()
-		.map(|(last_nonce, _, _)| last_nonce != nonces.end())
+		.map(|details| details.nonce != *nonces.end())
 		.unwrap_or(true);
 	if last_nonce_is_missing {
 		return make_missing_nonce_error(*nonces.end());
@@ -317,8 +317,8 @@ fn make_message_weights_map<C: Chain>(
 	let mut expected_nonce = *nonces.start();
 	let mut is_at_head = true;
 
-	for (nonce, weight, size) in weights {
+	for details in weights {
-		match (nonce == expected_nonce, is_at_head) {
+		match (details.nonce == expected_nonce, is_at_head) {
 			(true, _) => (),
 			(false, true) => {
 				// this may happen if some messages were already pruned from the source node
@@ -328,7 +328,7 @@ fn make_message_weights_map<C: Chain>(
 					target: "bridge",
 					"Some messages are missing from the {} node: {:?}. Target node may be out of sync?",
 					C::NAME,
-					expected_nonce..nonce,
+					expected_nonce..details.nonce,
 				);
 			}
 			(false, false) => {
@@ -340,13 +340,13 @@ fn make_message_weights_map<C: Chain>(
 		}
 
 		weights_map.insert(
-			nonce,
+			details.nonce,
 			MessageWeights {
-				weight,
+				weight: details.dispatch_weight,
-				size: size as _,
+				size: details.size as _,
 			},
 		);
-		expected_nonce = nonce + 1;
+		expected_nonce = details.nonce + 1;
 		is_at_head = false;
 	}
 
@@ -357,11 +357,24 @@ fn make_message_weights_map<C: Chain>(
 mod tests {
 	use super::*;
 
+	fn message_details_from_rpc(
+		nonces: RangeInclusive<MessageNonce>,
+	) -> Vec<bp_messages::MessageDetails<bp_rialto::Balance>> {
+		nonces
+			.into_iter()
+			.map(|nonce| bp_messages::MessageDetails {
+				nonce,
+				dispatch_weight: 0,
+				size: 0,
+				delivery_and_dispatch_fee: 0,
+			})
+			.collect()
+	}
+
 	#[test]
-	fn make_message_weights_map_succeeds_if_no_messages_are_missing() {
+	fn make_message_details_map_succeeds_if_no_messages_are_missing() {
 		assert_eq!(
-			make_message_weights_map::<relay_rialto_client::Rialto>(vec![(1, 0, 0), (2, 0, 0), (3, 0, 0)], 1..=3,)
+			make_message_details_map::<relay_rialto_client::Rialto>(message_details_from_rpc(1..=3), 1..=3,).unwrap(),
-				.unwrap(),
 			vec![
 				(1, MessageWeights { weight: 0, size: 0 }),
 				(2, MessageWeights { weight: 0, size: 0 }),
@@ -373,9 +386,9 @@ mod tests {
 	}
 
 	#[test]
-	fn make_message_weights_map_succeeds_if_head_messages_are_missing() {
+	fn make_message_details_map_succeeds_if_head_messages_are_missing() {
 		assert_eq!(
-			make_message_weights_map::<relay_rialto_client::Rialto>(vec![(2, 0, 0), (3, 0, 0)], 1..=3,).unwrap(),
+			make_message_details_map::<relay_rialto_client::Rialto>(message_details_from_rpc(2..=3), 1..=3,).unwrap(),
 			vec![
 				(2, MessageWeights { weight: 0, size: 0 }),
 				(3, MessageWeights { weight: 0, size: 0 }),
@@ -386,25 +399,27 @@ mod tests {
 	}
 
 	#[test]
-	fn make_message_weights_map_fails_if_mid_messages_are_missing() {
+	fn make_message_details_map_fails_if_mid_messages_are_missing() {
+		let mut message_details_from_rpc = message_details_from_rpc(1..=3);
+		message_details_from_rpc.remove(1);
 		assert!(matches!(
-			make_message_weights_map::<relay_rialto_client::Rialto>(vec![(1, 0, 0), (3, 0, 0)], 1..=3,),
+			make_message_details_map::<relay_rialto_client::Rialto>(message_details_from_rpc, 1..=3,),
 			Err(SubstrateError::Custom(_))
 		));
 	}
 
 	#[test]
-	fn make_message_weights_map_fails_if_tail_messages_are_missing() {
+	fn make_message_details_map_fails_if_tail_messages_are_missing() {
 		assert!(matches!(
-			make_message_weights_map::<relay_rialto_client::Rialto>(vec![(1, 0, 0), (2, 0, 0)], 1..=3,),
+			make_message_details_map::<relay_rialto_client::Rialto>(message_details_from_rpc(1..=2), 1..=3,),
 			Err(SubstrateError::Custom(_))
 		));
 	}
 
 	#[test]
-	fn make_message_weights_map_fails_if_all_messages_are_missing() {
+	fn make_message_details_map_fails_if_all_messages_are_missing() {
 		assert!(matches!(
-			make_message_weights_map::<relay_rialto_client::Rialto>(vec![], 1..=3),
+			make_message_details_map::<relay_rialto_client::Rialto>(vec![], 1..=3),
 			Err(SubstrateError::Custom(_))
 		));
 	}