mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-05-07 03:48:01 +00:00
Wei Tang
47f209a7a5
* aura: remove unneeded SlotDuration struct and rename digest -> digests * aura: add alias type for SlotDuration * aura: fix tests * Fix missing parameters in get_or_compute * Use special function for fetching aura slot_duration
66 lines
2.2 KiB
Rust
66 lines
2.2 KiB
Rust
// Copyright 2018-2020 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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//! Aura (Authority-Round) digests
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//!
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//! This implements the digests for AuRa, to allow the private
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//! `CompatibleDigestItem` trait to appear in public interfaces.
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use sp_core::Pair;
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use sp_consensus_aura::AURA_ENGINE_ID;
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use sp_runtime::generic::{DigestItem, OpaqueDigestItemId};
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use codec::{Encode, Codec};
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use std::fmt::Debug;
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type Signature<P> = <P as Pair>::Signature;
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/// A digest item which is usable with aura consensus.
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pub trait CompatibleDigestItem<P: Pair>: Sized {
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/// Construct a digest item which contains a signature on the hash.
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fn aura_seal(signature: Signature<P>) -> Self;
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/// If this item is an Aura seal, return the signature.
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fn as_aura_seal(&self) -> Option<Signature<P>>;
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/// Construct a digest item which contains the slot number
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fn aura_pre_digest(slot_num: u64) -> Self;
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/// If this item is an AuRa pre-digest, return the slot number
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fn as_aura_pre_digest(&self) -> Option<u64>;
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}
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impl<P, Hash> CompatibleDigestItem<P> for DigestItem<Hash> where
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P: Pair,
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Signature<P>: Codec,
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Hash: Debug + Send + Sync + Eq + Clone + Codec + 'static
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{
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fn aura_seal(signature: Signature<P>) -> Self {
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DigestItem::Seal(AURA_ENGINE_ID, signature.encode())
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}
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fn as_aura_seal(&self) -> Option<Signature<P>> {
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self.try_to(OpaqueDigestItemId::Seal(&AURA_ENGINE_ID))
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}
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fn aura_pre_digest(slot_num: u64) -> Self {
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DigestItem::PreRuntime(AURA_ENGINE_ID, slot_num.encode())
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}
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fn as_aura_pre_digest(&self) -> Option<u64> {
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self.try_to(OpaqueDigestItemId::PreRuntime(&AURA_ENGINE_ID))
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}
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}
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