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Merge pull request #3329 from arik-so/monitor_archive_docs_followup

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Document monitor archival idempotency requirement (#3276 followup)
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Gursharan Singh 2024-10-15 13:54:46 -07:00 • committed by GitHub
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lightning/src/chain/chainmonitor.rs
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@ -162,6 +162,13 @@ pub trait Persist<ChannelSigner: EcdsaChannelSigner> {
///
/// Archiving the data in a backup location (rather than deleting it fully) is useful for
/// hedging against data loss in case of unexpected failure.
///
/// Note that if a crash occurs during the archiving process, and its implementation is not
/// atomic, a state may emerge with the archival operation only being partially complete. In
/// that scenario, the monitor may still be loaded on startup pending successful completion of
/// the archive process. Additionally, because the archive operation could be retried on
/// restart, this method must in that case be idempotent, ensuring it can handle scenarios where
/// the monitor already exists in the archive.
fn archive_persisted_channel(&self, channel_funding_outpoint: OutPoint);
}