read latest_generated_nonce directly from storage (paritytech#1260)

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

@@ -768,10 +768,6 @@ impl_runtime_apis! {
 		fn latest_received_nonce(lane: bp_messages::LaneId) -> bp_messages::MessageNonce {
 			BridgeRialtoMessages::outbound_latest_received_nonce(lane)
 		}
-
-		fn latest_generated_nonce(lane: bp_messages::LaneId) -> bp_messages::MessageNonce {
-			BridgeRialtoMessages::outbound_latest_generated_nonce(lane)
-		}
 	}
 
 	impl bp_rialto::FromRialtoInboundLaneApi<Block> for Runtime {

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

@@ -916,10 +916,6 @@ impl_runtime_apis! {
 		fn latest_received_nonce(lane: bp_messages::LaneId) -> bp_messages::MessageNonce {
 			BridgeMillauMessages::outbound_latest_received_nonce(lane)
 		}
-
-		fn latest_generated_nonce(lane: bp_messages::LaneId) -> bp_messages::MessageNonce {
-			BridgeMillauMessages::outbound_latest_generated_nonce(lane)
-		}
 	}
 
 	impl bp_millau::FromMillauInboundLaneApi<Block> for Runtime {

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

@@ -98,9 +98,6 @@ pub const TO_KUSAMA_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToKusamaOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
 /// Name of the `ToKusamaOutboundLaneApi::message_details` runtime method.
 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.
 pub const TO_KUSAMA_LATEST_RECEIVED_NONCE_METHOD: &str =
 	"ToKusamaOutboundLaneApi_latest_received_nonce";
@@ -156,8 +153,6 @@ sp_api::decl_runtime_apis! {
 		) -> 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.
-		fn latest_generated_nonce(lane: LaneId) -> MessageNonce;
 	}
 
 	/// Inbound message lane API for messages sent by Kusama chain.

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

@@ -278,9 +278,6 @@ pub const TO_MILLAU_MESSAGE_DETAILS_METHOD: &str = "ToMillauOutboundLaneApi_mess
 /// 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.
-pub const TO_MILLAU_LATEST_GENERATED_NONCE_METHOD: &str =
-	"ToMillauOutboundLaneApi_latest_generated_nonce";
 
 /// Name of the `FromMillauInboundLaneApi::latest_received_nonce` runtime method.
 pub const FROM_MILLAU_LATEST_RECEIVED_NONCE_METHOD: &str =
@@ -333,8 +330,6 @@ sp_api::decl_runtime_apis! {
 		) -> 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.
-		fn latest_generated_nonce(lane: LaneId) -> MessageNonce;
 	}
 
 	/// Inbound message lane API for messages sent by Millau chain.

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

@@ -98,9 +98,6 @@ pub const TO_POLKADOT_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToPolkadotOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
 /// Name of the `ToPolkadotOutboundLaneApi::message_details` runtime method.
 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.
 pub const TO_POLKADOT_LATEST_RECEIVED_NONCE_METHOD: &str =
 	"ToPolkadotOutboundLaneApi_latest_received_nonce";
@@ -156,8 +153,6 @@ sp_api::decl_runtime_apis! {
 		) -> 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.
-		fn latest_generated_nonce(lane: LaneId) -> MessageNonce;
 	}
 
 	/// Inbound message lane API for messages sent by Polkadot chain.

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

@@ -247,9 +247,6 @@ pub const TO_RIALTO_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToRialtoOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
 /// Name of the `ToRialtoOutboundLaneApi::message_details` runtime method.
 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.
 pub const TO_RIALTO_LATEST_RECEIVED_NONCE_METHOD: &str =
 	"ToRialtoOutboundLaneApi_latest_received_nonce";
@@ -305,8 +302,6 @@ sp_api::decl_runtime_apis! {
 		) -> 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.
-		fn latest_generated_nonce(lane: LaneId) -> MessageNonce;
 	}
 
 	/// Inbound message lane API for messages sent by Rialto chain.

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

@@ -87,9 +87,6 @@ pub const TO_ROCOCO_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToRococoOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
 /// Name of the `ToRococoOutboundLaneApi::message_details` runtime method.
 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.
 pub const TO_ROCOCO_LATEST_RECEIVED_NONCE_METHOD: &str =
 	"ToRococoOutboundLaneApi_latest_received_nonce";
@@ -157,8 +154,6 @@ sp_api::decl_runtime_apis! {
 		) -> 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.
-		fn latest_generated_nonce(lane: LaneId) -> MessageNonce;
 	}
 
 	/// Inbound message lane API for messages sent by Rococo chain.

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

@@ -90,29 +90,6 @@ pub fn derive_account_from_rococo_id(id: bp_runtime::SourceAccount<AccountId>) -
 /// Name of the `WestendFinalityApi::best_finalized` runtime method.
 pub const BEST_FINALIZED_WESTEND_HEADER_METHOD: &str = "WestendFinalityApi_best_finalized";
 
-/// 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::message_details` runtime method.
-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.
-pub const TO_WESTEND_LATEST_RECEIVED_NONCE_METHOD: &str =
-	"ToWestendOutboundLaneApi_latest_received_nonce";
-
-/// Name of the `FromWestendInboundLaneApi::latest_received_nonce` runtime method.
-pub const FROM_WESTEND_LATEST_RECEIVED_NONCE_METHOD: &str =
-	"FromWestendInboundLaneApi_latest_received_nonce";
-/// Name of the `FromWestendInboundLaneApi::latest_onfirmed_nonce` runtime method.
-pub const FROM_WESTEND_LATEST_CONFIRMED_NONCE_METHOD: &str =
-	"FromWestendInboundLaneApi_latest_confirmed_nonce";
-/// Name of the `FromWestendInboundLaneApi::unrewarded_relayers_state` runtime method.
-pub const FROM_WESTEND_UNREWARDED_RELAYERS_STATE: &str =
-	"FromWestendInboundLaneApi_unrewarded_relayers_state";
-
 /// The target length of a session (how often authorities change) on Westend measured in of number
 /// of blocks.
 ///

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

@@ -52,9 +52,6 @@ pub const TO_WOCOCO_ESTIMATE_MESSAGE_FEE_METHOD: &str =
 	"ToWococoOutboundLaneApi_estimate_message_delivery_and_dispatch_fee";
 /// Name of the `ToWococoOutboundLaneApi::message_details` runtime method.
 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.
 pub const TO_WOCOCO_LATEST_RECEIVED_NONCE_METHOD: &str =
 	"ToWococoOutboundLaneApi_latest_received_nonce";
@@ -110,8 +107,6 @@ sp_api::decl_runtime_apis! {
 		) -> 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.
-		fn latest_generated_nonce(lane: LaneId) -> MessageNonce;
 	}
 
 	/// Inbound message lane API for messages sent by Wococo chain.

bridges/relays/client-kusama/src/lib.rs

@@ -75,8 +75,6 @@ impl ChainWithMessages for Kusama {
 		bp_kusama::WITH_KUSAMA_MESSAGES_PALLET_NAME;
 	const TO_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_kusama::TO_KUSAMA_MESSAGE_DETAILS_METHOD;
-	const TO_CHAIN_LATEST_GENERATED_NONCE_METHOD: &'static str =
-		bp_kusama::TO_KUSAMA_LATEST_GENERATED_NONCE_METHOD;
 	const TO_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =
 		bp_kusama::TO_KUSAMA_LATEST_RECEIVED_NONCE_METHOD;
 	const FROM_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =

bridges/relays/client-millau/src/lib.rs

@@ -59,8 +59,6 @@ impl ChainWithMessages for Millau {
 		bp_millau::WITH_MILLAU_MESSAGES_PALLET_NAME;
 	const TO_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_millau::TO_MILLAU_MESSAGE_DETAILS_METHOD;
-	const TO_CHAIN_LATEST_GENERATED_NONCE_METHOD: &'static str =
-		bp_millau::TO_MILLAU_LATEST_GENERATED_NONCE_METHOD;
 	const TO_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =
 		bp_millau::TO_MILLAU_LATEST_RECEIVED_NONCE_METHOD;
 	const FROM_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =

bridges/relays/client-polkadot/src/lib.rs

@@ -75,8 +75,6 @@ impl ChainWithMessages for Polkadot {
 		bp_polkadot::WITH_POLKADOT_MESSAGES_PALLET_NAME;
 	const TO_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_polkadot::TO_POLKADOT_MESSAGE_DETAILS_METHOD;
-	const TO_CHAIN_LATEST_GENERATED_NONCE_METHOD: &'static str =
-		bp_polkadot::TO_POLKADOT_LATEST_GENERATED_NONCE_METHOD;
 	const TO_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =
 		bp_polkadot::TO_POLKADOT_LATEST_RECEIVED_NONCE_METHOD;
 	const FROM_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =

bridges/relays/client-rialto/src/lib.rs

@@ -74,8 +74,6 @@ impl ChainWithMessages for Rialto {
 		bp_rialto::WITH_RIALTO_MESSAGES_PALLET_NAME;
 	const TO_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_rialto::TO_RIALTO_MESSAGE_DETAILS_METHOD;
-	const TO_CHAIN_LATEST_GENERATED_NONCE_METHOD: &'static str =
-		bp_rialto::TO_RIALTO_LATEST_GENERATED_NONCE_METHOD;
 	const TO_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =
 		bp_rialto::TO_RIALTO_LATEST_RECEIVED_NONCE_METHOD;
 	const FROM_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =

bridges/relays/client-rococo/src/lib.rs

@@ -78,8 +78,6 @@ impl ChainWithMessages for Rococo {
 		bp_rococo::WITH_ROCOCO_MESSAGES_PALLET_NAME;
 	const TO_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_rococo::TO_ROCOCO_MESSAGE_DETAILS_METHOD;
-	const TO_CHAIN_LATEST_GENERATED_NONCE_METHOD: &'static str =
-		bp_rococo::TO_ROCOCO_LATEST_GENERATED_NONCE_METHOD;
 	const TO_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =
 		bp_rococo::TO_ROCOCO_LATEST_RECEIVED_NONCE_METHOD;
 	const FROM_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =

bridges/relays/client-substrate/src/chain.rs

@@ -76,9 +76,6 @@ pub trait ChainWithMessages: Chain {
 	/// Name of the `To<ChainWithMessages>OutboundLaneApi::message_details` runtime API method.
 	/// The method is provided by the runtime that is bridged with this `ChainWithMessages`.
 	const TO_CHAIN_MESSAGE_DETAILS_METHOD: &'static str;
-	/// Name of the `To<ChainWithMessages>OutboundLaneApi::latest_generated_nonce` runtime API
-	/// method. The method is provided by the runtime that is bridged with this `ChainWithMessages`.
-	const TO_CHAIN_LATEST_GENERATED_NONCE_METHOD: &'static str;
 	/// Name of the `To<ChainWithMessages>OutboundLaneApi::latest_received_nonce` runtime API
 	/// method. The method is provided by the runtime that is bridged with this `ChainWithMessages`.
 	const TO_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str;

bridges/relays/client-wococo/src/lib.rs

@@ -78,8 +78,6 @@ impl ChainWithMessages for Wococo {
 		bp_wococo::WITH_WOCOCO_MESSAGES_PALLET_NAME;
 	const TO_CHAIN_MESSAGE_DETAILS_METHOD: &'static str =
 		bp_wococo::TO_WOCOCO_MESSAGE_DETAILS_METHOD;
-	const TO_CHAIN_LATEST_GENERATED_NONCE_METHOD: &'static str =
-		bp_wococo::TO_WOCOCO_LATEST_GENERATED_NONCE_METHOD;
 	const TO_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =
 		bp_wococo::TO_WOCOCO_LATEST_RECEIVED_NONCE_METHOD;
 	const FROM_CHAIN_LATEST_RECEIVED_NONCE_METHOD: &'static str =

bridges/relays/lib-substrate-relay/src/messages_source.rs

@@ -28,7 +28,10 @@ use crate::{
 };
 
 use async_trait::async_trait;
-use bp_messages::{LaneId, MessageNonce, UnrewardedRelayersState};
+use bp_messages::{
+	storage_keys::outbound_lane_data_key, LaneId, MessageNonce, OutboundLaneData,
+	UnrewardedRelayersState,
+};
 use bridge_runtime_common::messages::{
 	source::FromBridgedChainMessagesDeliveryProof, target::FromBridgedChainMessagesProof,
 };
@@ -126,16 +129,19 @@ where
 		&self,
 		id: SourceHeaderIdOf<MessageLaneAdapter<P>>,
 	) -> Result<(SourceHeaderIdOf<MessageLaneAdapter<P>>, MessageNonce), SubstrateError> {
-		let encoded_response = self
+		let outbound_lane_data: Option<OutboundLaneData> = self
 			.client
-			.state_call(
-				P::TargetChain::TO_CHAIN_LATEST_GENERATED_NONCE_METHOD.into(),
-				Bytes(self.lane_id.encode()),
+			.storage_value(
+				outbound_lane_data_key(
+					P::TargetChain::WITH_CHAIN_MESSAGES_PALLET_NAME,
+					&self.lane_id,
+				),
 				Some(id.1),
 			)
 			.await?;
-		let latest_generated_nonce: MessageNonce = Decode::decode(&mut &encoded_response.0[..])
-			.map_err(SubstrateError::ResponseParseFailed)?;
+		// lane data missing from the storage is fine until first message is sent
+		let latest_generated_nonce =
+			outbound_lane_data.map(|data| data.latest_generated_nonce).unwrap_or(0);
 		Ok((id, latest_generated_nonce))
 	}