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// This file is part of Substrate.
// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/// Contains the inherents for the AURA module
use sp_inherents::{Error, InherentData, InherentIdentifier};
/// The Aura inherent identifier.
pub const INHERENT_IDENTIFIER: InherentIdentifier = *b"auraslot";
/// The type of the Aura inherent.
pub type InherentType = sp_consensus_slots::Slot;
/// Auxiliary trait to extract Aura inherent data.
pub trait AuraInherentData {
/// Get aura inherent data.
fn aura_inherent_data(&self) -> Result<Option<InherentType>, Error>;
/// Replace aura inherent data.
fn aura_replace_inherent_data(&mut self, new: InherentType);
}
impl AuraInherentData for InherentData {
fn aura_inherent_data(&self) -> Result<Option<InherentType>, Error> {
self.get_data(&INHERENT_IDENTIFIER)
}
fn aura_replace_inherent_data(&mut self, new: InherentType) {
self.replace_data(INHERENT_IDENTIFIER, &new);
}
}
/// Provides the slot duration inherent data for `Aura`.
// TODO: Remove in the future. https://github.com/paritytech/substrate/issues/8029
#[cfg(feature = "std")]
pub struct InherentDataProvider {
slot: InherentType,
}
#[cfg(feature = "std")]
impl InherentDataProvider {
/// Create a new instance with the given slot.
pub fn new(slot: InherentType) -> Self {
Self { slot }
}
/// Creates the inherent data provider by calculating the slot from the given
/// `timestamp` and `duration`.
pub fn from_timestamp_and_slot_duration(
timestamp: sp_timestamp::Timestamp,
slot_duration: sp_consensus_slots::SlotDuration,
) -> Self {
let slot = InherentType::from_timestamp(timestamp, slot_duration);
Self { slot }
}
}
#[cfg(feature = "std")]
impl core::ops::Deref for InherentDataProvider {
type Target = InherentType;
fn deref(&self) -> &Self::Target {
&self.slot
}
}
#[cfg(feature = "std")]
#[async_trait::async_trait]
impl sp_inherents::InherentDataProvider for InherentDataProvider {
async fn provide_inherent_data(&self, inherent_data: &mut InherentData) -> Result<(), Error> {
inherent_data.put_data(INHERENT_IDENTIFIER, &self.slot)
}
async fn try_handle_error(
&self,
_: &InherentIdentifier,
_: &[u8],
) -> Option<Result<(), Error>> {
// There is no error anymore
None
}
}