mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-27 09:17:58 +00:00
Bernhard Schuster
124 lines
3.7 KiB
Rust
124 lines
3.7 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::request::RequestError;
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use thiserror::Error;
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use futures::channel::oneshot;
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use polkadot_node_subsystem_util::{Fault, runtime, unwrap_non_fatal};
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use polkadot_subsystem::SubsystemError;
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use crate::LOG_TARGET;
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#[derive(Debug, Error)]
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#[error(transparent)]
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pub struct Error(pub Fault<NonFatal, Fatal>);
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impl From<NonFatal> for Error {
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fn from(e: NonFatal) -> Self {
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Self(Fault::from_non_fatal(e))
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}
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}
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impl From<Fatal> for Error {
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fn from(f: Fatal) -> Self {
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Self(Fault::from_fatal(f))
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}
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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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Self(Fault::from_other(o))
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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")]
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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")]
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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")]
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Runtime(#[from] #[source] 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 is not cached.")]
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NoSuchCachedSession,
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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")]
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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")]
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Runtime(#[from] #[source] runtime::NonFatal),
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}
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pub type Result<T> = std::result::Result<T, Error>;
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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)
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-> std::result::Result<(), Fatal>
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{
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if let Some(error) = unwrap_non_fatal(result.map_err(|e| e.0))? {
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tracing::warn!(target: LOG_TARGET, error = ?error, ctx);
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}
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Ok(())
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}
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