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Add equivocation detector crate and implement clients (#2348) (#2353)

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* Split FinalitySyncPipeline and SourceClient

* Move some logic to finality_base

* Add empty equivocation detection clients

* Add equivocation reporting logic to the source client

* Use convenience trait for SubstrateFinalitySyncPipeline

* Define JustificationVerificationContext for GRANDPA

* Equivocation source client: finality_verification_context()

* Equivocation source client: synced_headers_finality_info()

* reuse HeaderFinalityInfo

* Define EquivocationsFinder

* Fix spellcheck

* Address review comments

* Avoid equivocations lookup errors
This commit is contained in:
Serban Iorga
2023-08-16 08:20:09 +03:00
committed by Bastian Köcher
parent 9bfad80664
commit 48cae06a77
35 changed files with 931 additions and 375 deletions
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bridges/relays/finality/src/finality_loop.rs
+6 -11
View File
@@ -20,11 +20,13 @@
//! assume that the persistent proof either exists, or will eventually become available.
use crate::{
sync_loop_metrics::SyncLoopMetrics, FinalityProof, FinalitySyncPipeline, SourceHeader,
sync_loop_metrics::SyncLoopMetrics, FinalityPipeline, FinalitySyncPipeline, SourceClientBase,
SourceHeader,
};
use async_trait::async_trait;
use backoff::backoff::Backoff;
use bp_header_chain::FinalityProof;
use futures::{select, Future, FutureExt, Stream, StreamExt};
use num_traits::{One, Saturating};
use relay_utils::{
@@ -66,11 +68,7 @@ pub struct FinalitySyncParams {
/// Source client used in finality synchronization loop.
#[async_trait]
pub trait SourceClient<P: FinalitySyncPipeline>: RelayClient {
/// Stream of new finality proofs. The stream is allowed to miss proofs for some
/// headers, even if those headers are mandatory.
type FinalityProofsStream: Stream<Item = P::FinalityProof> + Send;
pub trait SourceClient<P: FinalitySyncPipeline>: SourceClientBase<P> {
/// Get best finalized block number.
async fn best_finalized_block_number(&self) -> Result<P::Number, Self::Error>;
@@ -79,9 +77,6 @@ pub trait SourceClient<P: FinalitySyncPipeline>: RelayClient {
&self,
number: P::Number,
) -> Result<(P::Header, Option<P::FinalityProof>), Self::Error>;
/// Subscribe to new finality proofs.
async fn finality_proofs(&self) -> Result<Self::FinalityProofsStream, Self::Error>;
}
/// Target client used in finality synchronization loop.
@@ -143,10 +138,10 @@ pub async fn run<P: FinalitySyncPipeline>(
pub(crate) type UnjustifiedHeaders<H> = Vec<H>;
/// Finality proofs container. Ordered by target header number.
pub(crate) type FinalityProofs<P> =
Vec<(<P as FinalitySyncPipeline>::Number, <P as FinalitySyncPipeline>::FinalityProof)>;
Vec<(<P as FinalityPipeline>::Number, <P as FinalityPipeline>::FinalityProof)>;
/// Reference to finality proofs container.
pub(crate) type FinalityProofsRef<'a, P> =
&'a [(<P as FinalitySyncPipeline>::Number, <P as FinalitySyncPipeline>::FinalityProof)];
&'a [(<P as FinalityPipeline>::Number, <P as FinalityPipeline>::FinalityProof)];
/// Error that may happen inside finality synchronization loop.
#[derive(Debug)]