Error logging for send xcm to pallet-xcm (#6579)

Author: bkontur

polkadot/xcm/pallet-xcm/src/lib.rs

@@ -363,7 +363,10 @@ pub mod pallet {
 			let message: Xcm<()> = (*message).try_into().map_err(|()| Error::<T>::BadVersion)?;
 
 			let message_id = Self::send_xcm(interior, dest.clone(), message.clone())
-				.map_err(Error::<T>::from)?;
+				.map_err(|error| {
+					tracing::error!(target: "xcm::pallet_xcm::send", ?error, ?dest, ?message, "XCM send failed with error");
+					Error::<T>::from(error)
+				})?;
 			let e = Event::Sent { origin: origin_location, destination: dest, message, message_id };
 			Self::deposit_event(e);
 			Ok(message_id)
@@ -1800,7 +1803,10 @@ impl<T: Config> Pallet<T> {
 
 		if let Some(remote_xcm) = remote_xcm {
 			let (ticket, price) = validate_send::<T::XcmRouter>(dest.clone(), remote_xcm.clone())
-				.map_err(Error::<T>::from)?;
+				.map_err(|error| {
+					tracing::error!(target: "xcm::pallet_xcm::execute_xcm_transfer", ?error, ?dest, ?remote_xcm, "XCM validate_send failed with error");
+					Error::<T>::from(error)
+				})?;
 			if origin != Here.into_location() {
 				Self::charge_fees(origin.clone(), price.clone()).map_err(|error| {
 					tracing::error!(
@@ -1810,7 +1816,11 @@ impl<T: Config> Pallet<T> {
 					Error::<T>::FeesNotMet
 				})?;
 			}
-			let message_id = T::XcmRouter::deliver(ticket).map_err(Error::<T>::from)?;
+			let message_id = T::XcmRouter::deliver(ticket)
+				.map_err(|error| {
+					tracing::error!(target: "xcm::pallet_xcm::execute_xcm_transfer", ?error, ?dest, ?remote_xcm, "XCM deliver failed with error");
+					Error::<T>::from(error)
+				})?;
 
 			let e = Event::Sent { origin, destination: dest, message: remote_xcm, message_id };
 			Self::deposit_event(e);

polkadot/xcm/xcm-builder/src/process_xcm_message.rs

@@ -58,7 +58,7 @@ impl<
 		let message = Xcm::<Call>::try_from(versioned_message).map_err(|_| {
 			log::trace!(
 				target: LOG_TARGET,
-				"Failed to convert `VersionedXcm` into `XcmV3`.",
+				"Failed to convert `VersionedXcm` into `xcm::prelude::Xcm`!",
 			);
 
 			ProcessMessageError::Unsupported