Get dispatch weight from the target chain (when DispatchFeePayment::AtTargetChain is used) (#1430)

* reintroduce From<SourceChain>InboundLaneApi

* impl From<Chain>InboundLaneApi for testnet runtimes

* use inboundlaneapi in relay

* remove unused OutboundXcmWeigher

* spelling

* added the only test to messages pallet

* fmt

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

@@ -893,15 +893,25 @@ impl_runtime_apis! {
 			lane: bp_messages::LaneId,
 			begin: bp_messages::MessageNonce,
 			end: bp_messages::MessageNonce,
-		) -> Vec<bp_messages::MessageDetails<Balance>> {
+		) -> Vec<bp_messages::OutboundMessageDetails<Balance>> {
 			bridge_runtime_common::messages_api::outbound_message_details::<
 				Runtime,
 				WithMillauMessagesInstance,
-				WithMillauMessageBridge,
-				xcm_config::OutboundXcmWeigher,
 			>(lane, begin, end)
 		}
 	}
+
+	impl bp_millau::FromMillauInboundLaneApi<Block, bp_millau::Balance> for Runtime {
+		fn message_details(
+			lane: bp_messages::LaneId,
+			messages: Vec<(bp_messages::MessagePayload, bp_messages::OutboundMessageDetails<bp_millau::Balance>)>,
+		) -> Vec<bp_messages::InboundMessageDetails> {
+			bridge_runtime_common::messages_api::inbound_message_details::<
+				Runtime,
+				WithMillauMessagesInstance,
+			>(lane, messages)
+		}
+	}
 }
 
 #[cfg(test)]

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

@@ -122,8 +122,6 @@ pub type Barrier = (
 	AllowKnownQueryResponses<XcmPallet>,
 );
 
-/// Outbound XCM weigher type.
-pub type OutboundXcmWeigher = xcm_builder::FixedWeightBounds<BaseXcmWeight, (), MaxInstructions>;
 /// Incoming XCM weigher type.
 pub type XcmWeigher = xcm_builder::FixedWeightBounds<BaseXcmWeight, Call, MaxInstructions>;