mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-29 02:07:56 +00:00
Benjamin Kampmann
303843f483
* Split Aura and Timestamp inherents out of paint * fixup node depedencies * move babe inherents to primitives * move authorship inherents into primitives * Move finalty tracker inherents into primitives * fix aura primitives import
77 lines
2.3 KiB
Rust
77 lines
2.3 KiB
Rust
// Copyright 2019 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate 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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// Substrate 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 Substrate. If not, see <http://www.gnu.org/licenses/>.
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//! SRML module that tracks the last finalized block, as perceived by block authors.
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#![cfg_attr(not(feature = "std"), no_std)]
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use inherents::{InherentIdentifier, InherentData, Error};
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use codec::Decode;
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#[cfg(feature = "std")]
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use codec::Encode;
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/// The identifier for the `finalnum` inherent.
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pub const INHERENT_IDENTIFIER: InherentIdentifier = *b"finalnum";
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/// Auxiliary trait to extract finalized inherent data.
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pub trait FinalizedInherentData<N: Decode> {
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/// Get finalized inherent data.
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fn finalized_number(&self) -> Result<N, Error>;
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}
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impl<N: Decode> FinalizedInherentData<N> for InherentData {
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fn finalized_number(&self) -> Result<N, Error> {
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self.get_data(&INHERENT_IDENTIFIER)
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.and_then(|r| r.ok_or_else(|| "Finalized number inherent data not found".into()))
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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, N> {
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inner: F,
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_marker: std::marker::PhantomData<N>,
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}
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#[cfg(feature = "std")]
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impl<F, N> InherentDataProvider<F, N> {
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pub fn new(final_oracle: F) -> Self {
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InherentDataProvider { inner: final_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, N: Encode> inherents::ProvideInherentData for InherentDataProvider<F, N>
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where F: Fn() -> Result<N, Error>
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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(
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&self,
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inherent_data: &mut InherentData,
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) -> Result<(), Error> {
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(self.inner)()
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.and_then(|n| inherent_data.put_data(INHERENT_IDENTIFIER, &n))
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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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