mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-05-31 02:51:01 +00:00
Svyatoslav Nikolsky
109 lines
3.3 KiB
Rust
109 lines
3.3 KiB
Rust
// Copyright 2019-2020 Parity Technologies (UK) Ltd.
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// This file is part of Parity Bridges Common.
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// Parity Bridges Common 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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// Parity Bridges Common 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 Parity Bridges Common. If not, see <http://www.gnu.org/licenses/>.
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//! Default generic implementation of headers source for basic Substrate client.
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use crate::chain::{BlockWithJustification, Chain};
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use crate::client::Client;
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use crate::error::Error;
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use async_trait::async_trait;
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use headers_relay::{
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sync_loop::SourceClient,
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sync_types::{HeaderIdOf, HeadersSyncPipeline, QueuedHeader, SourceHeader},
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};
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use relay_utils::relay_loop::Client as RelayClient;
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use sp_runtime::{traits::Header as HeaderT, Justification};
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use std::marker::PhantomData;
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/// Substrate node as headers source.
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pub struct HeadersSource<C: Chain, P> {
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client: Client<C>,
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_phantom: PhantomData<P>,
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}
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impl<C: Chain, P> HeadersSource<C, P> {
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/// Create new headers source using given client.
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pub fn new(client: Client<C>) -> Self {
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HeadersSource {
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client,
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_phantom: Default::default(),
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}
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}
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}
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impl<C: Chain, P> Clone for HeadersSource<C, P> {
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fn clone(&self) -> Self {
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HeadersSource {
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client: self.client.clone(),
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_phantom: Default::default(),
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}
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}
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}
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#[async_trait]
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impl<C: Chain, P: HeadersSyncPipeline> RelayClient for HeadersSource<C, P> {
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type Error = Error;
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async fn reconnect(&mut self) -> Result<(), Error> {
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self.client.reconnect().await
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}
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}
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#[async_trait]
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impl<C, P> SourceClient<P> for HeadersSource<C, P>
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where
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C: Chain,
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C::BlockNumber: relay_utils::BlockNumberBase,
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C::Header: Into<P::Header>,
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P: HeadersSyncPipeline<Extra = (), Completion = Justification, Hash = C::Hash, Number = C::BlockNumber>,
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P::Header: SourceHeader<C::Hash, C::BlockNumber>,
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{
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async fn best_block_number(&self) -> Result<P::Number, Error> {
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// we **CAN** continue to relay headers if source node is out of sync, because
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// target node may be missing headers that are already available at the source
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Ok(*self.client.best_header().await?.number())
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}
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async fn header_by_hash(&self, hash: P::Hash) -> Result<P::Header, Error> {
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self.client
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.header_by_hash(hash)
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.await
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.map(Into::into)
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.map_err(Into::into)
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}
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async fn header_by_number(&self, number: P::Number) -> Result<P::Header, Error> {
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self.client
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.header_by_number(number)
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.await
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.map(Into::into)
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.map_err(Into::into)
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}
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async fn header_completion(&self, id: HeaderIdOf<P>) -> Result<(HeaderIdOf<P>, Option<P::Completion>), Error> {
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let hash = id.1;
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let signed_block = self.client.get_block(Some(hash)).await?;
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let grandpa_justification = signed_block.justification().cloned();
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Ok((id, grandpa_justification))
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}
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async fn header_extra(&self, id: HeaderIdOf<P>, _header: QueuedHeader<P>) -> Result<(HeaderIdOf<P>, ()), Error> {
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Ok((id, ()))
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}
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}
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