mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-26 18:07:58 +00:00
Shawn Tabrizi
ff5d56fb76
* cargo +nightly fmt * add cargo-fmt check to ci * update ci * fmt * fmt * skip macro * ignore bridges
121 lines
3.9 KiB
Rust
121 lines
3.9 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::PeerId;
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use polkadot_primitives::v1::{CandidateHash, Hash};
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use polkadot_subsystem::SubsystemError;
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use thiserror::Error;
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use polkadot_node_subsystem_util::{runtime, unwrap_non_fatal, Fault};
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use crate::LOG_TARGET;
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/// General result.
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pub type Result<T> = std::result::Result<T, Error>;
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/// Result for non-fatal only failures.
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pub type NonFatalResult<T> = std::result::Result<T, NonFatal>;
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/// Result for fatal only failures.
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pub type FatalResult<T> = std::result::Result<T, Fatal>;
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/// Errors for statement distribution.
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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 runtime errors.
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#[derive(Debug, Error)]
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pub enum Fatal {
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/// Requester channel is never closed.
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#[error("Requester receiver stream finished")]
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RequesterReceiverFinished,
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/// Responder channel is never closed.
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#[error("Responder receiver stream finished")]
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ResponderReceiverFinished,
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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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/// Receiving subsystem message from overseer failed.
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#[error("Receiving message from overseer failed")]
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SubsystemReceive(#[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] runtime::Fatal),
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}
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/// Errors for fetching of runtime information.
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#[derive(Debug, Error)]
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pub enum NonFatal {
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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] runtime::NonFatal),
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/// Relay parent was not present in active heads.
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#[error("Relay parent could not be found in active heads")]
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NoSuchHead(Hash),
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/// Peer requested statement data for candidate that was never announced to it.
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#[error("Peer requested data for candidate it never received a notification for")]
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RequestedUnannouncedCandidate(PeerId, CandidateHash),
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/// A large statement status was requested, which could not be found.
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#[error("Statement status does not exist")]
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NoSuchLargeStatementStatus(Hash, CandidateHash),
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/// A fetched large statement was requested, but could not be found.
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#[error("Fetched large statement does not exist")]
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NoSuchFetchedLargeStatement(Hash, CandidateHash),
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/// Responder no longer waits for our data. (Should not happen right now.)
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#[error("Oneshot `GetData` channel closed")]
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ResponderGetDataCanceled,
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}
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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) -> FatalResult<()> {
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if let Some(error) = unwrap_non_fatal(result.map_err(|e| e.0))? {
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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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