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feat(daemon): import enriched snapshots - #7734
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Included review availability: This review used your included allowance. 4 included reviews remain after this review. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour. WalkthroughURL-based snapshot imports now check adjacent metadata for extended snapshot files. When metadata advertises files, the importer downloads and verifies them, then imports receipts/events and tipset-lookup data. The external RPC check script no longer runs index backfill. ChangesExtended Snapshot Import
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant SnapshotDaemon
participant maybe_import_extended_snapshots
participant SnapshotURL
participant Blockstore
participant ChainIndex
SnapshotDaemon->>maybe_import_extended_snapshots: Pass database, snapshot URL, head tipset, and temporary directory
maybe_import_extended_snapshots->>SnapshotURL: Request adjacent .metadata.json
SnapshotURL-->>maybe_import_extended_snapshots: Return advertised files and SHA-256 values
maybe_import_extended_snapshots->>SnapshotURL: Download advertised CAR files
maybe_import_extended_snapshots->>Blockstore: Write receipts/events CAR blocks
maybe_import_extended_snapshots->>ChainIndex: Import validated tipset-lookup mappings
Merge Risk: 🟡 Moderate · up to Snapshot imports can silently omit enriched data, exhaust daemon memory on large sidecars, or yield incorrect historical results; the external RPC checks can also fail without their historical index. Resolve these risks before merging. 🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
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Inline comments:
Review comments at @scripts/tests/external-rpc-checks/init.sh:
- Line 9: Update the initialization flow in this script so a successful `forest
--halt-after-import` exit is not treated as proof that extended import produced
the sidecar data; require successful sidecar imports or retain the former index
backfill fallback before proceeding to the RPC checks.
Review comments at @src/daemon/db_util.rs:
- Line 409: Update the SHA-256 calculation in the download verification flow to
read the temporary file in bounded chunks and incrementally hash them, instead
of loading it all with tokio::fs::read; preserve the existing digest encoding
and verification behavior.
- Line 374: Update the metadata URL construction so `.metadata.json` is appended
to the parsed snapshot URL’s path, preserving any query parameters unchanged.
Replace the full-URL string formatting in the `metadata_url` assignment with
path-aware URL manipulation.
- Around line 426-427: In the CAR import loop, validate each `CarBlock` before
calling `db.put_keyed`, so blocks whose data does not match their CID are
rejected rather than stored. Use `CarBlock::validate` and propagate its
validation error.
- Around line 451-453: Before the hamt.for_each_cacheless write loop, validate
each checkpoint key against tipsets on the imported head’s ancestry, not only by
checking that its epoch is at or below head.epoch(); reject keys that resolve to
a different snapshot or fork, following the database-backed validation used for
manual sidecar imports.
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CHANGELOG.mdscripts/tests/external-rpc-checks/init.shsrc/daemon/db_util.rssrc/daemon/mod.rs
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Summary of changes
Changes introduced in this pull request:
--auto-download-snapshotor--import-snapshot <url>), it fetches<snapshot-url>.metadata.jsonand reads theSnapshot.Extendedkey that contains thereceipts_eventsandtipset_lookupenriched snapshotsexternal-rpc-checksReference issue to close (if applicable)
Closes #6802
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