Handle UnknownBlock error

Author: tdimitrov

node/core/runtime-api/src/lib.rs

@@ -27,7 +27,7 @@ use polkadot_node_subsystem::{
 	messages::{RuntimeApiMessage, RuntimeApiRequest as Request},
 	overseer, FromOrchestra, OverseerSignal, SpawnedSubsystem, SubsystemError, SubsystemResult,
 };
-use polkadot_node_subsystem_types::RuntimeApiSubsystemClient;
+use polkadot_node_subsystem_types::{ApiError, RuntimeApiSubsystemClient};
 use polkadot_primitives::v2::Hash;
 
 use cache::{RequestResult, RequestResultCache};
@@ -356,11 +356,19 @@ where
 			let version: u32 = $version;	// enforce type for the version expression
 			let runtime_version = client.api_version_parachain_host(relay_parent).await
 				.unwrap_or_else(|e| {
-					gum::warn!(
-						target: LOG_TARGET,
-						"cannot query the runtime API version: {}",
-						e,
-					);
+					if let ApiError::UnknownBlock(s) = e {
+						gum::warn!(
+							target: LOG_TARGET,
+							"cannot query the runtime API version. UnknownBlock error: {}",
+							s,
+						);
+					} else {
+						gum::warn!(
+							target: LOG_TARGET,
+							"cannot query the runtime API version: {}",
+							e,
+						);
+					}
 					Some(0)
 				})
 				.unwrap_or_else(|| {

node/subsystem-types/src/lib.rs

@@ -31,7 +31,7 @@ pub mod errors;
 pub mod messages;
 
 mod runtime_client;
-pub use runtime_client::RuntimeApiSubsystemClient;
+pub use runtime_client::{ApiError, RuntimeApiSubsystemClient};
 
 pub use jaeger::*;
 pub use polkadot_node_jaeger as jaeger;

node/subsystem-types/src/runtime_client.rs

@@ -25,11 +25,12 @@ use polkadot_primitives::{
 		ValidationCode, ValidationCodeHash, ValidatorId, ValidatorIndex, ValidatorSignature,
 	},
 };
-use sp_api::{ApiError, ApiExt, ProvideRuntimeApi};
+use sp_api::{ApiExt, ProvideRuntimeApi};
 use sp_authority_discovery::AuthorityDiscoveryApi;
 use sp_consensus_babe::{BabeApi, Epoch};
 use std::collections::BTreeMap;
 
+pub use sp_api::ApiError;
 /// Exposes all runtime calls that are used by the runtime API subsystem.
 #[async_trait]
 pub trait RuntimeApiSubsystemClient {