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Chain-selection subsystem data revert (#5350)

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* Chain-selection subsystem data revert

* Cargo fmt

* Better code comments

* Remove unwraps

* Document public method

* Remove duplicated 'ChainSelectionSubsystem' impl block

* Fix typos

* Nitpicks

* Revert returns a service Error

* Removed superflous error handling

* Apply suggestions from code review

* Rename tree 'revert' to 'revert_to'

Co-authored-by: Sebastian Kunert <skunert49@gmail.com>
This commit is contained in:
Davide Galassi
2022-04-28 17:44:14 +02:00
committed by GitHub
parent ac23b3f96c
commit bbdfc3d9c6
6 changed files with 243 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files
polkadot/node/core/chain-selection/src/lib.rs
+18 -8
View File
@@ -315,6 +315,17 @@ impl ChainSelectionSubsystem {
pub fn new(config: Config, db: Arc<dyn Database>) -> Self {
ChainSelectionSubsystem { config, db }
}
/// Revert to the block corresponding to the specified `hash`.
/// The revert is not allowed for blocks older than the last finalized one.
pub fn revert(&self, hash: Hash) -> Result<(), Error> {
let backend_config = db_backend::v1::Config { col_data: self.config.col_data };
let mut backend = db_backend::v1::DbBackend::new(self.db.clone(), backend_config);
let ops = tree::revert_to(&backend, hash)?.into_write_ops();
backend.write(ops)
}
}
impl<Context> overseer::Subsystem<Context, SubsystemError> for ChainSelectionSubsystem
@@ -323,9 +334,9 @@ where
Context: overseer::SubsystemContext<Message = ChainSelectionMessage>,
{
fn start(self, ctx: Context) -> SpawnedSubsystem {
let backend = crate::db_backend::v1::DbBackend::new(
let backend = db_backend::v1::DbBackend::new(
self.db,
crate::db_backend::v1::Config { col_data: self.config.col_data },
db_backend::v1::Config { col_data: self.config.col_data },
);
SpawnedSubsystem {
@@ -412,7 +423,7 @@ where
let _ = tx.send(leaves);
}
ChainSelectionMessage::BestLeafContaining(required, tx) => {
let best_containing = crate::backend::find_best_leaf_containing(
let best_containing = backend::find_best_leaf_containing(
&*backend,
required,
)?;
@@ -549,7 +560,7 @@ async fn handle_active_leaf(
};
let reversion_logs = extract_reversion_logs(&header);
crate::tree::import_block(
tree::import_block(
&mut overlay,
hash,
header.number,
@@ -612,8 +623,7 @@ fn handle_finalized_block(
finalized_hash: Hash,
finalized_number: BlockNumber,
) -> Result<(), Error> {
let ops =
crate::tree::finalize_block(&*backend, finalized_hash, finalized_number)?.into_write_ops();
let ops = tree::finalize_block(&*backend, finalized_hash, finalized_number)?.into_write_ops();
backend.write(ops)
}
@@ -623,7 +633,7 @@ fn handle_approved_block(backend: &mut impl Backend, approved_block: Hash) -> Re
let ops = {
let mut overlay = OverlayedBackend::new(&*backend);
crate::tree::approve_block(&mut overlay, approved_block)?;
tree::approve_block(&mut overlay, approved_block)?;
overlay.into_write_ops()
};
@@ -633,7 +643,7 @@ fn handle_approved_block(backend: &mut impl Backend, approved_block: Hash) -> Re
fn detect_stagnant(backend: &mut impl Backend, now: Timestamp) -> Result<(), Error> {
let ops = {
let overlay = crate::tree::detect_stagnant(&*backend, now)?;
let overlay = tree::detect_stagnant(&*backend, now)?;
overlay.into_write_ops()
};