mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-07-03 07:37:23 +00:00
Robert Klotzner
138 lines
4.5 KiB
Rust
138 lines
4.5 KiB
Rust
// Copyright 2021 Parity Technologies (UK) Ltd.
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// This file is part of Polkadot.
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// Polkadot is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Polkadot is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Polkadot. If not, see <http://www.gnu.org/licenses/>.
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//
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//! Error handling related code and Error/Result definitions.
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use polkadot_node_network_protocol::request_response::outgoing::RequestError;
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use polkadot_primitives::v1::SessionIndex;
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use thiserror::Error;
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use futures::channel::oneshot;
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use polkadot_node_subsystem_util::runtime;
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use polkadot_subsystem::SubsystemError;
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use crate::LOG_TARGET;
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#[derive(Debug, Error, derive_more::From)]
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#[error(transparent)]
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pub enum Error {
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/// All fatal errors.
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Fatal(Fatal),
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/// All nonfatal/potentially recoverable errors.
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NonFatal(NonFatal),
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}
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impl From<runtime::Error> for Error {
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fn from(o: runtime::Error) -> Self {
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match o {
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runtime::Error::Fatal(f) => Self::Fatal(Fatal::Runtime(f)),
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runtime::Error::NonFatal(f) => Self::NonFatal(NonFatal::Runtime(f)),
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}
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}
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}
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/// Fatal errors of this subsystem.
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#[derive(Debug, Error)]
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pub enum Fatal {
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/// Spawning a running task failed.
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#[error("Spawning subsystem task failed: {0}")]
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SpawnTask(#[source] SubsystemError),
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/// Requester stream exhausted.
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#[error("Erasure chunk requester stream exhausted")]
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RequesterExhausted,
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#[error("Receive channel closed: {0}")]
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IncomingMessageChannel(#[source] SubsystemError),
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/// Errors coming from runtime::Runtime.
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#[error("Error while accessing runtime information: {0}")]
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Runtime(#[from] runtime::Fatal),
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}
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/// Non-fatal errors of this subsystem.
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#[derive(Debug, Error)]
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pub enum NonFatal {
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/// av-store will drop the sender on any error that happens.
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#[error("Response channel to obtain chunk failed")]
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QueryChunkResponseChannel(#[source] oneshot::Canceled),
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/// av-store will drop the sender on any error that happens.
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#[error("Response channel to obtain available data failed")]
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QueryAvailableDataResponseChannel(#[source] oneshot::Canceled),
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/// We tried accessing a session that was not cached.
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#[error("Session {missing_session} is not cached, cached sessions: {available_sessions:?}.")]
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NoSuchCachedSession { available_sessions: Vec<SessionIndex>, missing_session: SessionIndex },
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/// Sending request response failed (Can happen on timeouts for example).
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#[error("Sending a request's response failed.")]
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SendResponse,
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/// Fetching PoV failed with `RequestError`.
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#[error("FetchPoV request error: {0}")]
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FetchPoV(#[source] RequestError),
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/// Fetching PoV failed as the received PoV did not match the expected hash.
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#[error("Fetched PoV does not match expected hash")]
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UnexpectedPoV,
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#[error("Remote responded with `NoSuchPoV`")]
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NoSuchPoV,
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/// No validator with the index could be found in current session.
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#[error("Given validator index could not be found")]
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InvalidValidatorIndex,
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/// Errors coming from runtime::Runtime.
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#[error("Error while accessing runtime information: {0}")]
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Runtime(#[from] runtime::NonFatal),
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}
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/// General result type for fatal/nonfatal errors.
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pub type Result<T> = std::result::Result<T, Error>;
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/// Results which are never fatal.
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pub type NonFatalResult<T> = std::result::Result<T, NonFatal>;
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/// Utility for eating top level errors and log them.
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///
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/// We basically always want to try and continue on error. This utility function is meant to
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/// consume top-level errors by simply logging them
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pub fn log_error(result: Result<()>, ctx: &'static str) -> std::result::Result<(), Fatal> {
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match result {
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Err(Error::Fatal(f)) => Err(f),
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Err(Error::NonFatal(error)) => {
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match error {
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NonFatal::UnexpectedPoV |
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NonFatal::InvalidValidatorIndex |
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NonFatal::NoSuchCachedSession { .. } |
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NonFatal::QueryAvailableDataResponseChannel(_) |
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NonFatal::QueryChunkResponseChannel(_) =>
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tracing::warn!(target: LOG_TARGET, error = %error, ctx),
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NonFatal::FetchPoV(_) |
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NonFatal::SendResponse |
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NonFatal::NoSuchPoV |
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NonFatal::Runtime(_) => tracing::debug!(target: LOG_TARGET, error = ?error, ctx),
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}
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Ok(())
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},
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Ok(()) => Ok(()),
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}
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}
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