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Call tidy_keys upon queue_key

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Prevents the potential case of the substrate task and the scan task writing to
the same storage slot at once.
This commit is contained in:
Luke Parker 2024-09-19 01:05:36 -04:00
parent 673cf8fd47
commit a691be21c8
2 changed files with 25 additions and 24 deletions
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46
processor/scanner/src/db.rs
View file

@ -116,6 +116,28 @@ impl<S: ScannerFeed> ScannerGlobalDb<S> {
StartBlock::set(txn, &block)
}
fn tidy_keys(txn: &mut impl DbTxn) {
let mut keys: Vec<SeraiKeyDbEntry<EncodableG<KeyFor<S>>>> =
ActiveKeys::get(txn).expect("retiring key yet no active keys");
let Some(key) = keys.first() else { return };
// Get the block we're scanning for next
let block_number = next_to_scan_for_outputs_block::<S>(txn).expect(
"tidying keys despite never setting the next to scan for block (done on initialization)",
);
// If this key is scheduled for retiry...
if let Some(retire_at) = RetireAt::get(txn, key.key) {
// And is retired by/at this block...
if retire_at <= block_number {
// Remove it from the list of keys
let key = keys.remove(0);
ActiveKeys::set(txn, &keys);
// Also clean up the retiry block
RetireAt::del(txn, key.key);
}
}
}
/// Queue a key.
///
/// Keys may be queued whenever, so long as they're scheduled to activate `WINDOW_LENGTH` blocks
@ -165,6 +187,9 @@ impl<S: ScannerFeed> ScannerGlobalDb<S> {
// Push and save the next key
keys.push(SeraiKeyDbEntry { activation_block_number, key: EncodableG(key) });
ActiveKeys::set(txn, &keys);
// Now tidy the keys, ensuring this has a maximum length of 2
Self::tidy_keys(txn);
}
/// Retire a key.
///
@ -181,27 +206,6 @@ impl<S: ScannerFeed> ScannerGlobalDb<S> {
RetireAt::set(txn, EncodableG(key), &at_block);
}
pub(crate) fn tidy_keys(txn: &mut impl DbTxn) {
let mut keys: Vec<SeraiKeyDbEntry<EncodableG<KeyFor<S>>>> =
ActiveKeys::get(txn).expect("retiring key yet no active keys");
let Some(key) = keys.first() else { return };
// Get the block we're scanning for next
let block_number = next_to_scan_for_outputs_block::<S>(txn).expect(
"tidying keys despite never setting the next to scan for block (done on initialization)",
);
// If this key is scheduled for retiry...
if let Some(retire_at) = RetireAt::get(txn, key.key) {
// And is retired by/at this block...
if retire_at <= block_number {
// Remove it from the list of keys
let key = keys.remove(0);
ActiveKeys::set(txn, &keys);
// Also clean up the retiry block
RetireAt::del(txn, key.key);
}
}
}
/// Fetch the active keys, as of the next-to-scan-for-outputs Block.
///
/// This means the scan task should scan for all keys returned by this.

3
processor/scanner/src/scan/mod.rs
View file

@ -116,9 +116,6 @@ impl<D: Db, S: ScannerFeed> ContinuallyRan for ScanTask<D, S> {
assert_eq!(ScanDb::<S>::next_to_scan_for_outputs_block(&txn).unwrap(), b);
// Tidy the keys, then fetch them
// We don't have to tidy them here, we just have to somewhere, so why not here?
ScannerGlobalDb::<S>::tidy_keys(&mut txn);
let keys = ScannerGlobalDb::<S>::active_keys_as_of_next_to_scan_for_outputs_block(&txn)
.expect("scanning for a blockchain without any keys set");