mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-05-06 20:48:02 +00:00
Bastian Köcher
e3e651f72c
* Happy new year Updates the copyright years and fixes wrong license headers. * Fix the template * Split HEADER into HEADER-APACHE & HEADER-GPL
93 lines
2.6 KiB
Rust
93 lines
2.6 KiB
Rust
// This file is part of Substrate.
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// Copyright (C) 2019-2021 Parity Technologies (UK) Ltd.
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// SPDX-License-Identifier: Apache-2.0
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//! Authorship Primitives
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#![cfg_attr(not(feature = "std"), no_std)]
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use sp_std::{result::Result, prelude::*};
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use codec::{Encode, Decode};
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use sp_inherents::{Error, InherentIdentifier, InherentData, IsFatalError};
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use sp_runtime::RuntimeString;
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/// The identifier for the `uncles` inherent.
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pub const INHERENT_IDENTIFIER: InherentIdentifier = *b"uncles00";
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/// Errors that can occur while checking the authorship inherent.
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#[derive(Encode, sp_runtime::RuntimeDebug)]
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#[cfg_attr(feature = "std", derive(Decode))]
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pub enum InherentError {
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Uncles(RuntimeString),
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}
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impl IsFatalError for InherentError {
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fn is_fatal_error(&self) -> bool {
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match self {
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InherentError::Uncles(_) => true,
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}
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}
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}
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/// Auxiliary trait to extract uncles inherent data.
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pub trait UnclesInherentData<H: Decode> {
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/// Get uncles.
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fn uncles(&self) -> Result<Vec<H>, Error>;
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}
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impl<H: Decode> UnclesInherentData<H> for InherentData {
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fn uncles(&self) -> Result<Vec<H>, Error> {
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Ok(self.get_data(&INHERENT_IDENTIFIER)?.unwrap_or_default())
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}
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}
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/// Provider for inherent data.
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#[cfg(feature = "std")]
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pub struct InherentDataProvider<F, H> {
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inner: F,
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_marker: std::marker::PhantomData<H>,
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}
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#[cfg(feature = "std")]
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impl<F, H> InherentDataProvider<F, H> {
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pub fn new(uncles_oracle: F) -> Self {
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InherentDataProvider { inner: uncles_oracle, _marker: Default::default() }
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}
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}
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#[cfg(feature = "std")]
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impl<F, H: Encode + std::fmt::Debug> sp_inherents::ProvideInherentData for InherentDataProvider<F, H>
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where F: Fn() -> Vec<H>
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{
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fn inherent_identifier(&self) -> &'static InherentIdentifier {
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&INHERENT_IDENTIFIER
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}
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fn provide_inherent_data(&self, inherent_data: &mut InherentData) -> Result<(), Error> {
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let uncles = (self.inner)();
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if !uncles.is_empty() {
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inherent_data.put_data(INHERENT_IDENTIFIER, &uncles)
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} else {
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Ok(())
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}
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}
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fn error_to_string(&self, _error: &[u8]) -> Option<String> {
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Some(format!("no further information"))
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}
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}
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