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// Copyright 2019-2023 Parity Technologies (UK) Ltd.
// This file is part of Parity Bridges Common.
// Parity Bridges Common is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity Bridges Common is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity Bridges Common. If not, see <http://www.gnu.org/licenses/>.
//! Default generic implementation of equivocation source for basic Substrate client.
use crate::{
equivocation::{EquivocationDetectionPipelineAdapter, SubstrateEquivocationDetectionPipeline},
finality_base::engine::Engine,
};
use crate::equivocation::{FinalityProoffOf, FinalityVerificationContextfOf};
use async_trait::async_trait;
use bp_header_chain::HeaderFinalityInfo;
use bp_runtime::BlockNumberOf;
use equivocation_detector::TargetClient;
use relay_substrate_client::{Client, Error};
use relay_utils::relay_loop::Client as RelayClient;
use sp_runtime::traits::Header;
use std::marker::PhantomData;
/// Substrate node as equivocation source.
pub struct SubstrateEquivocationTarget<P: SubstrateEquivocationDetectionPipeline> {
client: Client<P::TargetChain>,
_phantom: PhantomData<P>,
}
impl<P: SubstrateEquivocationDetectionPipeline> SubstrateEquivocationTarget<P> {}
impl<P: SubstrateEquivocationDetectionPipeline> Clone for SubstrateEquivocationTarget<P> {
fn clone(&self) -> Self {
Self { client: self.client.clone(), _phantom: Default::default() }
}
}
#[async_trait]
impl<P: SubstrateEquivocationDetectionPipeline> RelayClient for SubstrateEquivocationTarget<P> {
type Error = Error;
async fn reconnect(&mut self) -> Result<(), Error> {
self.client.reconnect().await
}
}
#[async_trait]
impl<P: SubstrateEquivocationDetectionPipeline>
TargetClient<EquivocationDetectionPipelineAdapter<P>> for SubstrateEquivocationTarget<P>
{
async fn finality_verification_context(
&self,
at: BlockNumberOf<P::TargetChain>,
) -> Result<FinalityVerificationContextfOf<P>, Self::Error> {
P::FinalityEngine::finality_verification_context(
&self.client,
self.client.header_by_number(at).await?.hash(),
)
.await
}
async fn synced_headers_finality_info(
&self,
at: BlockNumberOf<P::TargetChain>,
) -> Result<
Vec<HeaderFinalityInfo<FinalityProoffOf<P>, FinalityVerificationContextfOf<P>>>,
Self::Error,
> {
P::FinalityEngine::synced_headers_finality_info(
&self.client,
self.client.header_by_number(at).await?.hash(),
)
.await
}
}