consensus: persist AppQC and blocks to disk#2896
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Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## main #2896 +/- ##
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+ Coverage 57.22% 57.27% +0.05%
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Files 2093 2100 +7
Lines 171771 172599 +828
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+ Hits 98294 98855 +561
- Misses 64701 64868 +167
- Partials 8776 8876 +100
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| for lane, q := range inner.blocks { | ||
| m[lane] = q.first | ||
| } |
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Extract generic A/B file persistence into a reusable consensus/persist/ sub-package and add block-file persistence for crash-safe availability state recovery. Changes: - Move persist.go and persist_test.go into consensus/persist/ (git mv to preserve history), exporting Persister, NewPersister, WriteAndSync, SuffixA, SuffixB. - Add persist/blocks.go: per-block file persistence using <lane_hex>_<blocknum>.pb files in a blocks/ subdirectory, with load, delete-before, and header-mismatch validation. - Wire avail.NewState to accept stateDir, create A/B persister for AppQC and BlockPersister for signed lane proposals, and restore both on restart (contiguous block runs, queue alignment). - Update avail/state.go to persist AppQC on prune and delete obsolete block files after each AppQC advance. - Thread PersistentStateDir from consensus.Config through to avail.NewState. - Expand consensus/inner.go doc comment with full persistence design (what, why, recovery, write behavior, rebroadcasting). - Move TestRunOutputsPersistErrorPropagates to consensus/inner_test.go for proper package alignment. - Add comprehensive tests for blocks persistence (empty dir, multi-lane, corrupt/mismatched skip, DeleteBefore, filename roundtrip). Ref: sei-protocol/sei-v3#512 Co-authored-by: Cursor <cursoragent@cursor.com>
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Move persisted data loading (AppQC deserialization and block loading) into a dedicated function for readability. Co-authored-by: Cursor <cursoragent@cursor.com>
Move block sorting, contiguous-prefix extraction, and gap truncation from avail/inner.go into persist/blocks.go so all disk-recovery logic lives in one place. This isolates storage concerns in the persistence layer, simplifying newInner and preparing for a future storage backend swap. Co-authored-by: Cursor <cursoragent@cursor.com>
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| for lane, bs := range loaded.blocks { | ||
| q, ok := i.blocks[lane] | ||
| if !ok || len(bs) == 0 { | ||
| continue | ||
| } | ||
| first := bs[0].Number | ||
| q.first = first | ||
| q.next = first | ||
| for _, b := range bs { | ||
| q.q[q.next] = b.Proposal | ||
| q.next++ | ||
| } | ||
| // Advance the votes queue to match so headers() returns ErrPruned | ||
| // for already-committed blocks instead of blocking forever. | ||
| vq := i.votes[lane] | ||
| vq.first = first | ||
| vq.next = first | ||
| } |
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| for lane, bs := range raw { | ||
| sorted := slices.Sorted(maps.Keys(bs)) | ||
| var contiguous []LoadedBlock | ||
| for i, n := range sorted { | ||
| if i > 0 && n != sorted[i-1]+1 { | ||
| log.Warn(). | ||
| Str("lane", lane.String()). | ||
| Uint64("gapAt", uint64(sorted[i-1]+1)). | ||
| Int("skipped", len(sorted)-i). | ||
| Msg("truncating loaded blocks at gap; remaining will be re-fetched") | ||
| break | ||
| } | ||
| contiguous = append(contiguous, LoadedBlock{Number: n, Proposal: bs[n]}) | ||
| } | ||
| result[lane] = contiguous | ||
| } |
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Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
Adding crash-safe persistence for availability state (AppQC and signed lane proposals).
consensus/persist/sub-package: Moves the generic A/B file persistence logic (persist.go,persist_test.go) into its own package viagit mv(preserving history), exportingPersister,NewPersister,WriteAndSync,SuffixA/SuffixB.persist/blocks.go): Each signed lane proposal is stored as an individual<lane_hex>_<blocknum>.pbfile in ablocks/subdirectory; includes load-all, delete-before, and header-mismatch validation. On load, blocks are sorted and truncated at the first gap (with a warning log), so higher layers receive clean contiguous slices. (This is a temp remedy before we move to a real storage solution.)avail/state.go):NewStatenow acceptsstateDir, initialises both the A/B persister (for AppQC) andBlockPersister, loads persisted data on restart, and passes it tonewInnerfor queue restoration. Persistence loading is factored into a dedicatedloadPersistedStatehelper.avail/inner.go): On load, advancescommitQCs,appVotes, and per-lane block queues past already-persisted indices. Block restoration simply iterates the pre-sorted contiguous slices from the persistence layer.PersistentStateDirfromconsensus.Configthroughconsensus/state.gointoavail.NewState.consensus/inner.go): Documents what is persisted, why, recovery semantics, write behavior, and rebroadcasting strategy.TestRunOutputsPersistErrorPropagatestoconsensus/inner_test.gofor proper package alignment.persist/blocks.go, keepingnewInnerfocused on queue initialization. This prepares for a future storage backend swap.Test plan
consensus/persist/tests pass (A/B alternation, sequence picking, corruption, error propagation)persist/blocks_test.gotests pass (empty dir, single/multi-lane, corrupt/mismatched skip,DeleteBefore, filename roundtrip, gap truncation, corrupt-mid-sequence truncation)avail/inner_test.goandavail/state_test.goupdated and passing with newNewStatesignatureconsensus/inner_test.goupdated with relocated persist-error-propagation testgo build ./...succeedsgofmt -s -lcleanRef: sei-protocol/sei-v3#512
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