addition error definitions (#2107)

* remove low information density error doc comments

* another round of error dancing

* fix compilation

* remove stale `None` argument

* adjust test, minor slip in command

* only add AvailabilityError for full node features

* another None where none shuld be

polkadot/Cargo.lock

@@ -5564,6 +5564,7 @@ dependencies = [
  "sp-transaction-pool",
  "sp-trie",
  "substrate-prometheus-endpoint",
+ "thiserror",
  "tracing",
  "tracing-futures",
  "westend-runtime",

polkadot/cli/src/command.rs

@@ -16,9 +16,32 @@
 
 use log::info;
 use service::{IdentifyVariant, self};
-use sc_cli::{SubstrateCli, Result, RuntimeVersion, Role};
+use sc_cli::{SubstrateCli, RuntimeVersion, Role};
 use crate::cli::{Cli, Subcommand};
 
+#[derive(thiserror::Error, Debug)]
+pub enum Error {
+	#[error(transparent)]
+	PolkadotService(#[from] service::Error),
+
+	#[error(transparent)]
+	SubstrateCli(#[from] sc_cli::Error),
+
+	#[error(transparent)]
+	SubstrateService(#[from] sc_service::Error),
+
+	#[error("Other: {0}")]
+	Other(String),
+}
+
+impl std::convert::From<String> for Error {
+	fn from(s: String) -> Self {
+		Self::Other(s)
+	}
+}
+
+type Result<T> = std::result::Result<T, Error>;
+
 fn get_exec_name() -> Option<String> {
 	std::env::current_exe()
 		.ok()
@@ -139,22 +162,27 @@ pub fn run() -> Result<()> {
 				info!("----------------------------");
 			}
 
-			runner.run_node_until_exit(|config| async move {
+
+			Ok(runner.run_node_until_exit(move |config| async move {
 				let role = config.role.clone();
 
-				match role {
+				let task_manager = match role {
-					Role::Light => service::build_light(config).map(|(task_manager, _)| task_manager),
+					Role::Light => service::build_light(config).map(|(task_manager, _)| task_manager)
+					.map_err(|e| sc_service::Error::Other(e.to_string()) ),
 					_ => service::build_full(
 						config,
 						service::IsCollator::No,
 						grandpa_pause,
-					).map(|full| full.task_manager),
+					).map(|full| full.task_manager)
-				}
+					.map_err(|e| sc_service::Error::Other(e.to_string()) )
-			})
+				};
+				task_manager
+			}).map_err(|e| -> sc_cli::Error { e.into() })?)
+
 		},
 		Some(Subcommand::BuildSpec(cmd)) => {
 			let runner = cli.create_runner(cmd)?;
-			runner.sync_run(|config| cmd.run(config.chain_spec, config.network))
+			Ok(runner.sync_run(|config| cmd.run(config.chain_spec, config.network))?)
 		},
 		Some(Subcommand::CheckBlock(cmd)) => {
 			let runner = cli.create_runner(cmd)?;
@@ -163,7 +191,8 @@ pub fn run() -> Result<()> {
 			set_default_ss58_version(chain_spec);
 
 			runner.async_run(|mut config| {
-				let (client, _, import_queue, task_manager) = service::new_chain_ops(&mut config)?;
+				let (client, _, import_queue, task_manager) = service::new_chain_ops(&mut config)
+					.map_err(|e| sc_service::Error::Other(e.to_string()))?;
 				Ok((cmd.run(client, import_queue), task_manager))
 			})
 		},
@@ -174,7 +203,8 @@ pub fn run() -> Result<()> {
 			set_default_ss58_version(chain_spec);
 
 			runner.async_run(|mut config| {
-				let (client, _, _, task_manager) = service::new_chain_ops(&mut config)?;
+				let (client, _, _, task_manager) = service::new_chain_ops(&mut config)
+					.map_err(|e| sc_service::Error::Other(e.to_string()))?;
 				Ok((cmd.run(client, config.database), task_manager))
 			})
 		},
@@ -185,7 +215,8 @@ pub fn run() -> Result<()> {
 			set_default_ss58_version(chain_spec);
 
 			runner.async_run(|mut config| {
-				let (client, _, _, task_manager) = service::new_chain_ops(&mut config)?;
+				let (client, _, _, task_manager) = service::new_chain_ops(&mut config)
+					.map_err(|e| sc_service::Error::Other(e.to_string()))?;
 				Ok((cmd.run(client, config.chain_spec), task_manager))
 			})
 		},
@@ -196,13 +227,15 @@ pub fn run() -> Result<()> {
 			set_default_ss58_version(chain_spec);
 
 			runner.async_run(|mut config| {
-				let (client, _, import_queue, task_manager) = service::new_chain_ops(&mut config)?;
+				let (client, _, import_queue, task_manager) = service::new_chain_ops(&mut config)
+					.map_err(|e| sc_service::Error::Other(e.to_string()))?;
 				Ok((cmd.run(client, import_queue), task_manager))
 			})
 		},
 		Some(Subcommand::PurgeChain(cmd)) => {
 			let runner = cli.create_runner(cmd)?;
-			runner.sync_run(|config| cmd.run(config.database))
+			Ok(runner.sync_run(|config| cmd.run(config.database))
+				.map_err(|e| sc_service::Error::Other(e.to_string()))?)
 		},
 		Some(Subcommand::Revert(cmd)) => {
 			let runner = cli.create_runner(cmd)?;
@@ -211,7 +244,8 @@ pub fn run() -> Result<()> {
 			set_default_ss58_version(chain_spec);
 
 			runner.async_run(|mut config| {
-				let (client, backend, _, task_manager) = service::new_chain_ops(&mut config)?;
+				let (client, backend, _, task_manager) = service::new_chain_ops(&mut config)
+					.map_err(|e| sc_service::Error::Other(e.to_string()))?;
 				Ok((cmd.run(client, backend), task_manager))
 			})
 		},
@@ -237,5 +271,6 @@ pub fn run() -> Result<()> {
 			})
 		},
 		Some(Subcommand::Key(cmd)) => cmd.run(),
-	}
+	}?;
+	Ok(())
 }

polkadot/node/core/av-store/src/lib.rs

@@ -44,7 +44,6 @@ use polkadot_node_subsystem_util::metrics::{self, prometheus};
 use polkadot_subsystem::messages::{
 	AllMessages, AvailabilityStoreMessage, ChainApiMessage, RuntimeApiMessage, RuntimeApiRequest,
 };
-use thiserror::Error;
 
 const LOG_TARGET: &str = "availability";
 
@@ -54,22 +53,32 @@ mod columns {
 	pub const NUM_COLUMNS: u32 = 2;
 }
 
-#[derive(Debug, Error)]
+#[derive(Debug, thiserror::Error)]
-enum Error {
+#[allow(missing_docs)]
+pub enum Error {
 	#[error(transparent)]
 	RuntimeApi(#[from] RuntimeApiError),
+
 	#[error(transparent)]
 	ChainApi(#[from] ChainApiError),
+
 	#[error(transparent)]
 	Erasure(#[from] erasure::Error),
+
 	#[error(transparent)]
 	Io(#[from] io::Error),
+
 	#[error(transparent)]
 	Oneshot(#[from] oneshot::Canceled),
+
 	#[error(transparent)]
 	Subsystem(#[from] SubsystemError),
+
 	#[error(transparent)]
 	Time(#[from] SystemTimeError),
+
+	#[error("Custom databases are not supported")]
+	CustomDatabase,
 }
 
 impl Error {
@@ -418,10 +427,10 @@ pub struct Config {
 }
 
 impl std::convert::TryFrom<sc_service::config::DatabaseConfig> for Config {
-	type Error = &'static str;
+	type Error = Error;
 
 	fn try_from(config: sc_service::config::DatabaseConfig) -> Result<Self, Self::Error> {
-		let path = config.path().ok_or("custom databases are not supported")?;
+		let path = config.path().ok_or(Error::CustomDatabase)?;
 
 		Ok(Self {
 			// substrate cache size is improper here; just use the default

polkadot/node/core/bitfield-signing/src/lib.rs

@@ -35,7 +35,6 @@ use polkadot_node_subsystem_util::{
 use polkadot_primitives::v1::{AvailabilityBitfield, CoreState, Hash, ValidatorIndex};
 use std::{pin::Pin, time::Duration, iter::FromIterator};
 use wasm_timer::{Delay, Instant};
-use thiserror::Error;
 
 /// Delay between starting a bitfield signing job and its attempting to create a bitfield.
 const JOB_DELAY: Duration = Duration::from_millis(1500);
@@ -45,24 +44,24 @@ const LOG_TARGET: &str = "bitfield_signing";
 pub struct BitfieldSigningJob;
 
 /// Errors we may encounter in the course of executing the `BitfieldSigningSubsystem`.
-#[derive(Debug, Error)]
+#[derive(Debug, thiserror::Error)]
+#[allow(missing_docs)]
 pub enum Error {
-	/// error propagated from the utility subsystem
 	#[error(transparent)]
 	Util(#[from] util::Error),
-	/// io error
+
 	#[error(transparent)]
 	Io(#[from] std::io::Error),
-	/// a one shot channel was canceled
+
 	#[error(transparent)]
 	Oneshot(#[from] oneshot::Canceled),
-	/// a mspc channel failed to send
+
 	#[error(transparent)]
 	MpscSend(#[from] mpsc::SendError),
-	/// the runtime API failed to return what we wanted
+
 	#[error(transparent)]
 	Runtime(#[from] RuntimeApiError),
-	/// the keystore failed to process signing request
+
 	#[error("Keystore failed: {0:?}")]
 	Keystore(KeystoreError),
 }

polkadot/node/service/Cargo.toml

@@ -57,6 +57,7 @@ hex-literal = "0.3.1"
 tracing = "0.1.22"
 tracing-futures = "0.2.4"
 serde = { version = "1.0.118", features = ["derive"] }
+thiserror = "1.0.21"
 
 # Polkadot
 polkadot-node-core-proposer = { path = "../core/proposer" }

polkadot/node/service/src/lib.rs

@@ -27,9 +27,9 @@ use grandpa::{self, FinalityProofProvider as GrandpaFinalityProofProvider};
 use {
 	std::convert::TryInto,
 	std::time::Duration,
-
 	tracing::info,
 	polkadot_node_core_av_store::Config as AvailabilityConfig,
+	polkadot_node_core_av_store::Error as AvailabilityError,
 	polkadot_node_core_proposer::ProposerFactory,
 	polkadot_overseer::{AllSubsystems, BlockInfo, Overseer, OverseerHandler},
 	polkadot_primitives::v1::ParachainHost,
@@ -56,7 +56,7 @@ pub use sc_client_api::{Backend, ExecutionStrategy, CallExecutor};
 pub use sc_consensus::LongestChain;
 pub use sc_executor::NativeExecutionDispatch;
 pub use service::{
-	Role, PruningMode, TransactionPoolOptions, Error, RuntimeGenesis,
+	Role, PruningMode, TransactionPoolOptions, Error as SubstrateServiceError, RuntimeGenesis,
 	TFullClient, TLightClient, TFullBackend, TLightBackend, TFullCallExecutor, TLightCallExecutor,
 	Configuration, ChainSpec, TaskManager,
 };
@@ -97,6 +97,38 @@ native_executor_instance!(
 	frame_benchmarking::benchmarking::HostFunctions,
 );
 
+
+#[derive(thiserror::Error, Debug)]
+pub enum Error {
+	#[error(transparent)]
+	Io(#[from] std::io::Error),
+
+	#[error(transparent)]
+	AddrFormatInvalid(#[from] std::net::AddrParseError),
+
+	#[error(transparent)]
+	Sub(#[from] SubstrateServiceError),
+
+	#[error(transparent)]
+	Blockchain(#[from] sp_blockchain::Error),
+
+	#[error(transparent)]
+	Consensus(#[from] consensus_common::Error),
+
+	#[error("Failed to create an overseer")]
+	Overseer(#[from] polkadot_overseer::SubsystemError),
+
+	#[error(transparent)]
+	Prometheus(#[from] prometheus_endpoint::PrometheusError),
+
+	#[cfg(feature = "full-node")]
+	#[error(transparent)]
+	Availability(#[from] AvailabilityError),
+
+	#[error("Authorities require the real overseer implementation")]
+	AuthoritiesRequireRealOverseer,
+}
+
 /// Can be called for a `Configuration` to check if it is a configuration for the `Kusama` network.
 pub trait IdentifyVariant {
 	/// Returns if this is a configuration for the `Kusama` network.
@@ -304,7 +336,7 @@ where
 		AllSubsystems::<()>::dummy(),
 		registry,
 		spawner,
-	).map_err(|e| Error::Other(format!("Failed to create an Overseer: {:?}", e)))
+	).map_err(|e| e.into())
 }
 
 #[cfg(all(feature = "full-node", feature = "real-overseer"))]
@@ -418,7 +450,7 @@ where
 		all_subsystems,
 		registry,
 		spawner,
-	).map_err(|e| Error::Other(format!("Failed to create an Overseer: {:?}", e)))
+	).map_err(|e| e.into())
 }
 
 #[cfg(feature = "full-node")]
@@ -529,7 +561,7 @@ pub fn new_full<RuntimeApi, Executor>(
 
 	let telemetry_connection_sinks = service::TelemetryConnectionSinks::default();
 
-	let availability_config = config.database.clone().try_into();
+	let availability_config = config.database.clone().try_into().map_err(Error::Availability)?;
 
 	let rpc_handlers = service::spawn_tasks(service::SpawnTasksParams {
 		config,
@@ -605,7 +637,7 @@ pub fn new_full<RuntimeApi, Executor>(
 			leaves,
 			keystore_container.sync_keystore(),
 			overseer_client.clone(),
-			availability_config?,
+			availability_config,
 			network.clone(),
 			authority_discovery_service,
 			prometheus_registry.as_ref(),
@@ -644,7 +676,7 @@ pub fn new_full<RuntimeApi, Executor>(
 			task_manager.spawn_handle(),
 			client.clone(),
 			transaction_pool,
-			overseer_handler.as_ref().ok_or("authorities require real overseer handlers")?.clone(),
+			overseer_handler.as_ref().ok_or_else(|| Error::AuthoritiesRequireRealOverseer)?.clone(),
 			prometheus_registry.as_ref(),
 		);
 

polkadot/node/subsystem/src/lib.rs

@@ -151,13 +151,13 @@ pub enum SubsystemError {
 		/// An additional anotation tag for the origin of `source`.
 		origin: &'static str,
 		/// The wrapped error. Marked as source for tracking the error chain.
-		#[source] source: Box<dyn std::error::Error + Send>
+		#[source] source: Box<dyn 'static + std::error::Error + Send + Sync>
 	},
 }
 
 impl SubsystemError {
 	/// Adds a `str` as `origin` to the given error `err`.
-	pub fn with_origin<E: 'static + Send + std::error::Error>(origin: &'static str, err: E) -> Self {
+	pub fn with_origin<E: 'static + Send + Sync + std::error::Error>(origin: &'static str, err: E) -> Self {
 		Self::FromOrigin { origin, source: Box::new(err) }
 	}
 }

polkadot/node/test/service/src/lib.rs

@@ -28,7 +28,7 @@ use polkadot_primitives::v1::{
 };
 use polkadot_runtime_common::BlockHashCount;
 use polkadot_service::{
-	NewFull, FullClient, ClientHandle, ExecuteWithClient, IsCollator,
+	Error, NewFull, FullClient, ClientHandle, ExecuteWithClient, IsCollator,
 };
 use polkadot_node_subsystem::messages::{CollatorProtocolMessage, CollationGenerationMessage};
 use polkadot_test_runtime::{
@@ -45,7 +45,6 @@ use sc_network::{
 };
 use service::{
 	config::{DatabaseConfig, KeystoreConfig, MultiaddrWithPeerId, WasmExecutionMethod},
-	error::Error as ServiceError,
 	RpcHandlers, TaskExecutor, TaskManager,
 };
 use service::{BasePath, Configuration, Role};
@@ -76,14 +75,14 @@ pub fn new_full(
 	is_collator: IsCollator,
 ) -> Result<
 	NewFull<Arc<Client>>,
-	ServiceError,
+	Error,
 > {
 	polkadot_service::new_full::<polkadot_test_runtime::RuntimeApi, PolkadotTestExecutor>(
 		config,
 		is_collator,
 		None,
 		polkadot_parachain::wasm_executor::IsolationStrategy::InProcess,
-	).map_err(Into::into)
+	)
 }
 
 /// A wrapper for the test client that implements `ClientHandle`.

polkadot/parachain/test-parachains/adder/collator/src/main.rs

@@ -19,7 +19,7 @@
 use polkadot_node_primitives::CollationGenerationConfig;
 use polkadot_node_subsystem::messages::{CollationGenerationMessage, CollatorProtocolMessage};
 use polkadot_primitives::v1::Id as ParaId;
-use sc_cli::{Result, Role, SubstrateCli};
+use sc_cli::{Result, Error as SubstrateCliError, Role, SubstrateCli};
 use sp_core::hexdisplay::HexDisplay;
 use test_parachain_adder_collator::Collator;
 
@@ -46,7 +46,8 @@ fn main() -> Result<()> {
 			Ok(())
 		}
 		None => {
-			let runner = cli.create_runner(&cli.run.base)?;
+			let runner = cli.create_runner(&cli.run.base)
+				.map_err(|e| SubstrateCliError::Application(Box::new(e) as Box::<(dyn 'static + Send + Sync + std::error::Error)>))?;
 
 			runner.run_node_until_exit(|config| async move {
 				let role = config.role.clone();
@@ -60,7 +61,7 @@ fn main() -> Result<()> {
 							config,
 							polkadot_service::IsCollator::Yes(collator.collator_id()),
 							None,
-						)?;
+						).map_err(|e| e.to_string())?;
 						let mut overseer_handler = full_node
 							.overseer_handler
 							.expect("Overseer handler should be initialized for collators");
@@ -94,5 +95,6 @@ fn main() -> Result<()> {
 				}
 			})
 		}
-	}
+	}?;
+	Ok(())
 }