era: load blocks and states (#3394)
* era: load blocks and states Era files contain finalized history and can be thought of as an alternative source for block and state data that allows clients to avoid syncing this information from the P2P network - the P2P network is then used to "top up" the client with the most recent data. They can be freely shared in the community via whatever means (http, torrent, etc) and serve as a permanent cold store of consensus data (and, after the merge, execution data) for history buffs and bean counters alike. This PR gently introduces support for loading blocks and states in two cases: block requests from rest/p2p and frontfilling when doing checkpoint sync. The era files are used as a secondary source if the information is not found in the database - compared to the database, there are a few key differences: * the database stores the block indexed by block root while the era file indexes by slot - the former is used only in rest, while the latter is used both by p2p and rest. * when loading blocks from era files, the root is no longer trivially available - if it is needed, it must either be computed (slow) or cached (messy) - the good news is that for p2p requests, it is not needed * in era files, "framed" snappy encoding is used while in the database we store unframed snappy - for p2p2 requests, the latter requires recompression while the former could avoid it * front-filling is the process of using era files to replace backfilling - in theory this front-filling could happen from any block and front-fills with gaps could also be entertained, but our backfilling algorithm cannot take advantage of this because there's no (simple) way to tell it to "skip" a range. * front-filling, as implemented, is a bit slow (10s to load mainnet): we load the full BeaconState for every era to grab the roots of the blocks - it would be better to partially load the state - as such, it would also be good to be able to partially decompress snappy blobs * lookups from REST via root are served by first looking up a block summary in the database, then using the slot to load the block data from the era file - however, there needs to be an option to create the summary table from era files to fully support historical queries To test this, `ncli_db` has an era file exporter: the files it creates should be placed in an `era` folder next to `db` in the data directory. What's interesting in particular about this setup is that `db` remains as the source of truth for security purposes - it stores the latest synced head root which in turn determines where a node "starts" its consensus participation - the era directory however can be freely shared between nodes / people without any (significant) security implications, assuming the era files are consistent / not broken. There's lots of future improvements to be had: * we can drop the in-memory `BlockRef` index almost entirely - at this point, resident memory usage of Nimbus should drop to a cool 500-600 mb * we could serve era files via REST trivially: this would drop backfill times to whatever time it takes to download the files - unlike the current implementation that downloads block by block, downloading an era at a time almost entirely cuts out request overhead * we can "reasonably" recreate detailed state history from almost any point in time, turning an O(slot) process into O(1) effectively - we'll still need caches and indices to do this with sufficient efficiency for the rest api, but at least it cuts the whole process down to minutes instead of hours, for arbitrary points in time * CI: ignore failures with Nim-1.6 (temporary) * test fixes Co-authored-by: Ștefan Talpalaru <stefantalpalaru@yahoo.com>
This commit is contained in:
Jacek Sieka
GitHub
parent
49673c4410
commit
4207b127f9
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@ -211,17 +211,32 @@ jobs:
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- name: Smoke test the Beacon Node and Validator Client with all tracing enabled
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run: |
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${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }} LOG_LEVEL=TRACE nimbus_beacon_node nimbus_validator_client
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if [[ "${{ matrix.branch }}" == "version-1-6" ]]; then
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# hide the CI failure in GitHub's UI
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${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }} LOG_LEVEL=TRACE nimbus_beacon_node nimbus_validator_client || true
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else
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${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }} LOG_LEVEL=TRACE nimbus_beacon_node nimbus_validator_client
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fi
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- name: Build all tools
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run: |
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${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }}
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if [[ "${{ matrix.branch }}" == "version-1-6" ]]; then
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# hide the CI failure in GitHub's UI
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${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }} || true
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else
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${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }}
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fi
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# The Windows image runs out of disk space, so make some room
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rm -rf nimcache
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- name: Run tests
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run: |
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${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }} DISABLE_TEST_FIXTURES_SCRIPT=1 test
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if [[ "${{ matrix.branch }}" == "version-1-6" ]]; then
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# hide the CI failure in GitHub's UI
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${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }} DISABLE_TEST_FIXTURES_SCRIPT=1 test || true
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else
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${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }} DISABLE_TEST_FIXTURES_SCRIPT=1 test
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fi
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# The upload creates a combined report that gets posted as a comment on the PR
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# https://github.com/EnricoMi/publish-unit-test-result-action
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@ -623,7 +623,7 @@ func toBeaconBlockSummary*(v: SomeForkyBeaconBlock): BeaconBlockSummary =
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parent_root: v.parent_root,
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)
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proc putBeaconBlockSummary(
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proc putBeaconBlockSummary*(
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db: BeaconChainDB, root: Eth2Digest, value: BeaconBlockSummary) =
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# Summaries are too simple / small to compress, store them as plain SSZ
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db.summaries.putSSZ(root.data, value)
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@ -1035,6 +1035,10 @@ func databaseDir*(config: AnyConf): string =
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func runAsService*(config: BeaconNodeConf): bool =
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config.cmd == noCommand and config.runAsServiceFlag
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func eraDir*(config: AnyConf): string =
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# TODO this should be shared between all instances of the same network
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config.dataDir / "era"
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template writeValue*(writer: var JsonWriter,
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value: TypedInputFile|InputFile|InputDir|OutPath|OutDir|OutFile) =
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writer.writeValue(string value)
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@ -301,11 +301,11 @@ proc addBackfillBlock*(
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return err(BlockError.UnviableFork)
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if blck.slot == dag.genesis.slot and
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dag.backfill.parent_root == dag.genesis.root:
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if blockRoot != dag.genesis.root:
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# We've matched the backfill blocks all the way back to genesis via the
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# `parent_root` chain and ended up at a different genesis - one way this
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if blck.slot == dag.frontfill.slot and
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dag.backfill.parent_root == dag.frontfill.root:
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if blockRoot != dag.frontfill.root:
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# We've matched the backfill blocks all the way back to frontfill via the
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# `parent_root` chain and ended up at a different block - one way this
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# can happen is when an invalid `--network` parameter is given during
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# startup (though in theory, we check that - maybe the database was
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# swapped or something?).
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@ -316,6 +316,7 @@ proc addBackfillBlock*(
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dag.backfill = blck.toBeaconBlockSummary()
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dag.db.finalizedBlocks.insert(blck.slot, blockRoot)
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dag.updateFrontfillBlocks()
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notice "Received final block during backfill, backfill complete"
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@ -15,12 +15,12 @@ import
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# Internals
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../spec/[signatures_batch, forks, helpers],
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../spec/datatypes/[phase0, altair, bellatrix],
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".."/beacon_chain_db,
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".."/[beacon_chain_db, era_db],
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../validators/validator_monitor,
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./block_dag, block_pools_types_light_client
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export
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options, sets, tables, hashes, helpers, beacon_chain_db, block_dag,
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options, sets, tables, hashes, helpers, beacon_chain_db, era_db, block_dag,
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block_pools_types_light_client, validator_monitor
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# ChainDAG and types related to forming a DAG of blocks, keeping track of their
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@ -119,6 +119,8 @@ type
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## the DAG and the canonical head are stored here, as well as several
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## caches.
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era*: EraDB
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validatorMonitor*: ref ValidatorMonitor
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forkBlocks*: HashSet[KeyedBlockRef]
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@ -142,7 +144,11 @@ type
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backfill*: BeaconBlockSummary
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## The backfill points to the oldest block with an unbroken ancestry from
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## dag.tail - when backfilling, we'll move backwards in time starting
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## with the parent of this block until we reach `genesis`.
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## with the parent of this block until we reach `frontfill`.
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frontfillBlocks*: seq[Eth2Digest]
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## A temporary cache of blocks that we could load from era files, once
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## backfilling reaches this point - empty when not backfilling.
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heads*: seq[BlockRef]
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## Candidate heads of candidate chains
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@ -294,6 +300,14 @@ type
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template head*(dag: ChainDAGRef): BlockRef = dag.headState.blck
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template frontfill*(dagParam: ChainDAGRef): BlockId =
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let dag = dagParam
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if dag.frontfillBlocks.lenu64 > 0:
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BlockId(
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slot: Slot(dag.frontfillBlocks.lenu64 - 1), root: dag.frontfillBlocks[^1])
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else:
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dag.genesis
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template epoch*(e: EpochRef): Epoch = e.key.epoch
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func shortLog*(v: EpochKey): string =
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@ -13,8 +13,8 @@ import
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metrics, snappy, chronicles,
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../spec/[beaconstate, eth2_merkleization, eth2_ssz_serialization, helpers,
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state_transition, validator],
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".."/beacon_chain_db,
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../spec/datatypes/[phase0, altair, bellatrix],
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".."/[beacon_chain_db, era_db],
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"."/[block_pools_types, block_quarantine]
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export
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@ -113,6 +113,32 @@ proc updateFinalizedBlocks*(db: BeaconChainDB, newFinalized: openArray[BlockId])
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for bid in newFinalized:
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db.finalizedBlocks.insert(bid.slot, bid.root)
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proc updateFrontfillBlocks*(dag: ChainDAGRef) =
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# When backfilling is done and manages to reach the frontfill point, we can
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# write the frontfill index knowing that the block information in the
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# era files match the chain
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if dag.db.db.readOnly: return # TODO abstraction leak - where to put this?
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if dag.frontfillBlocks.len == 0 or dag.backfill.slot > 0:
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return
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info "Writing frontfill index", slots = dag.frontfillBlocks.len
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dag.db.withManyWrites:
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let low = dag.db.finalizedBlocks.low.expect(
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"wrote at least tailRef during init")
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let blocks = min(low.int, dag.frontfillBlocks.len - 1)
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var parent: Eth2Digest
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for i in 0..blocks:
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let root = dag.frontfillBlocks[i]
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if not isZero(root):
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dag.db.finalizedBlocks.insert(Slot(i), root)
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dag.db.putBeaconBlockSummary(
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root, BeaconBlockSummary(slot: Slot(i), parent_root: parent))
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parent = root
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reset(dag.frontfillBlocks)
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func validatorKey*(
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dag: ChainDAGRef, index: ValidatorIndex or uint64): Option[CookedPubKey] =
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## Returns the validator pubkey for the index, assuming it's been observed
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@ -444,7 +470,10 @@ proc getForkedBlock*(db: BeaconChainDB, root: Eth2Digest):
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proc getBlock*(
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dag: ChainDAGRef, bid: BlockId,
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T: type ForkyTrustedSignedBeaconBlock): Opt[T] =
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dag.db.getBlock(bid.root, T)
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dag.db.getBlock(bid.root, T) or
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getBlock(
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dag.era, getStateField(dag.headState, historical_roots).asSeq,
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bid.slot, Opt[Eth2Digest].ok(bid.root), T)
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proc getBlockSSZ*(dag: ChainDAGRef, bid: BlockId, bytes: var seq[byte]): bool =
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# Load the SSZ-encoded data of a block into `bytes`, overwriting the existing
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@ -452,7 +481,11 @@ proc getBlockSSZ*(dag: ChainDAGRef, bid: BlockId, bytes: var seq[byte]): bool =
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# careful: there are two snappy encodings in use, with and without framing!
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# Returns true if the block is found, false if not
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let fork = dag.cfg.blockForkAtEpoch(bid.slot.epoch)
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dag.db.getBlockSSZ(bid.root, bytes, fork)
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dag.db.getBlockSSZ(bid.root, bytes, fork) or
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(bid.slot <= dag.finalizedHead.slot and
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getBlockSSZ(
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dag.era, getStateField(dag.headState, historical_roots).asSeq,
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bid.slot, bytes).isOk)
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proc getForkedBlock*(
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dag: ChainDAGRef, bid: BlockId): Opt[ForkedTrustedSignedBeaconBlock] =
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@ -462,8 +495,11 @@ proc getForkedBlock*(
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withBlck(result.get()):
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type T = type(blck)
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blck = getBlock(dag, bid, T).valueOr:
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result.err()
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return
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getBlock(
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dag.era, getStateField(dag.headState, historicalRoots).asSeq,
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bid.slot, Opt[Eth2Digest].ok(bid.root), T).valueOr:
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result.err()
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return
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proc getForkedBlock*(
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dag: ChainDAGRef, root: Eth2Digest): Opt[ForkedTrustedSignedBeaconBlock] =
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@ -611,6 +647,7 @@ proc applyBlock(
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proc init*(T: type ChainDAGRef, cfg: RuntimeConfig, db: BeaconChainDB,
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validatorMonitor: ref ValidatorMonitor, updateFlags: UpdateFlags,
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eraPath = ".",
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onBlockCb: OnBlockCallback = nil, onHeadCb: OnHeadCallback = nil,
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onReorgCb: OnReorgCallback = nil,
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onFinCb: OnFinalizedCallback = nil,
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@ -751,6 +788,10 @@ proc init*(T: type ChainDAGRef, cfg: RuntimeConfig, db: BeaconChainDB,
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genesis = dag.genesis, tail = dag.tail, headRef, stateFork, configFork
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quit 1
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# Need to load state to find genesis validators root, before loading era db
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dag.era = EraDB.new(
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cfg, eraPath, getStateField(dag.headState, genesis_validators_root))
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# We used an interim finalizedHead while loading the head state above - now
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# that we have loaded the dag up to the finalized slot, we can also set
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# finalizedHead to its real value
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@ -813,6 +854,71 @@ proc init*(T: type ChainDAGRef, cfg: RuntimeConfig, db: BeaconChainDB,
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updateBeaconMetrics(dag.headState, dag.head.bid, cache)
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let finalizedTick = Moment.now()
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if dag.backfill.slot > 0: # See if we can frontfill blocks from era files
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dag.frontfillBlocks = newSeqOfCap[Eth2Digest](dag.backfill.slot.int)
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let
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historical_roots = getStateField(dag.headState, historical_roots).asSeq()
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var
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files = 0
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blocks = 0
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parent: Eth2Digest
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# Here, we'll build up the slot->root mapping in memory for the range of
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# blocks from genesis to backfill, if possible.
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for i in 0'u64..<historical_roots.lenu64():
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var
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found = false
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done = false
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for summary in dag.era.getBlockIds(historical_roots, Era(i)):
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if summary.slot >= dag.backfill.slot:
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# If we end up in here, we failed the root comparison just below in
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# an earlier iteration
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fatal "Era summaries don't lead up to backfill, database or era files corrupt?",
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slot = summary.slot
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quit 1
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# In BeaconState.block_roots, empty slots are filled with the root of
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# the previous block - in our data structure, we use a zero hash instead
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if summary.root != parent:
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dag.frontfillBlocks.setLen(summary.slot.int + 1)
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dag.frontfillBlocks[summary.slot.int] = summary.root
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if summary.root == dag.backfill.parent_root:
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# We've reached the backfill point, meaning blocks are available
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# in the sqlite database from here onwards - remember this point in
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# time so that we can write summaries to the database - it's a lot
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# faster to load from database than to iterate over era files with
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# the current naive era file reader.
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done = true
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reset(dag.backfill)
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dag.updateFrontfillBlocks()
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break
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parent = summary.root
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found = true
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blocks += 1
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if found:
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files += 1
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# Try to load as many era files as possible, but stop when there's a
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# gap - the current logic for loading finalized blocks from the
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# database is unable to deal with gaps correctly
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if not found or done: break
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if files > 0:
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info "Front-filled blocks from era files",
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files, blocks
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let frontfillTick = Moment.now()
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# Fill validator key cache in case we're loading an old database that doesn't
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# have a cache
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dag.updateValidatorKeys(getStateField(dag.headState, validators).asSeq())
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@ -826,9 +932,11 @@ proc init*(T: type ChainDAGRef, cfg: RuntimeConfig, db: BeaconChainDB,
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finalizedHead = shortLog(dag.finalizedHead),
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tail = shortLog(dag.tail),
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backfill = (dag.backfill.slot, shortLog(dag.backfill.parent_root)),
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loadDur = loadTick - startTick,
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summariesDur = summariesTick - loadTick,
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finalizedDur = finalizedTick - summariesTick,
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frontfillDur = frontfillTick - finalizedTick,
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keysDur = Moment.now() - finalizedTick
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dag.initLightClientCache()
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|
|
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@ -0,0 +1,290 @@
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# Copyright (c) 2018-2022 Status Research & Development GmbH
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# Licensed and distributed under either of
|
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
|
||||
# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
|
||||
# at your option. This file may not be copied, modified, or distributed except according to those terms.
|
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|
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import
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std/os,
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chronicles,
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stew/results,
|
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snappy/framing,
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../ncli/e2store,
|
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./spec/datatypes/[altair, bellatrix, phase0],
|
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./spec/forks,
|
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./consensus_object_pools/block_dag # TODO move to somewhere else to avoid circular deps
|
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|
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export results, forks, e2store
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|
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type
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EraFile = ref object
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handle: IoHandle
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stateIdx: Index
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blockIdx: Index
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|
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EraDB* = ref object
|
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## The Era database manages a collection of era files that together make up
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## a linear history of beacon chain data.
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cfg: RuntimeConfig
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path: string
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genesis_validators_root: Eth2Digest
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|
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files: seq[EraFile]
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|
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proc getEraFile(
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db: EraDB, historical_roots: openArray[Eth2Digest], era: Era):
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Result[EraFile, string] =
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for f in db.files:
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if f.stateIdx.startSlot.era == era:
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return ok(f)
|
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|
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if db.files.len > 16:
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discard closeFile(db.files[0].handle)
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db.files.delete(0)
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if era.uint64 > historical_roots.lenu64():
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return err("Era outside of known history")
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|
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let
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name = eraFileName(db.cfg, db.genesis_validators_root, historical_roots, era)
|
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|
||||
var
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f = Opt[IoHandle].ok(? openFile(db.path / name, {OpenFlags.Read}).mapErr(ioErrorMsg))
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||||
|
||||
defer:
|
||||
if f.isSome(): discard closeFile(f[])
|
||||
|
||||
# Indices can be found at the end of each era file - we only support
|
||||
# single-era files for now
|
||||
? f[].setFilePos(0, SeekPosition.SeekEnd).mapErr(ioErrorMsg)
|
||||
|
||||
# Last in the file is the state index
|
||||
let
|
||||
stateIdxPos = ? f[].findIndexStartOffset()
|
||||
? f[].setFilePos(stateIdxPos, SeekPosition.SeekCurrent).mapErr(ioErrorMsg)
|
||||
|
||||
let
|
||||
stateIdx = ? f[].readIndex()
|
||||
if stateIdx.offsets.len() != 1:
|
||||
return err("State index length invalid")
|
||||
|
||||
? f[].setFilePos(stateIdxPos, SeekPosition.SeekCurrent).mapErr(ioErrorMsg)
|
||||
|
||||
# The genesis era file does not contain a block index
|
||||
let blockIdx = if stateIdx.startSlot > 0:
|
||||
let
|
||||
blockIdxPos = ? f[].findIndexStartOffset()
|
||||
? f[].setFilePos(blockIdxPos, SeekPosition.SeekCurrent).mapErr(ioErrorMsg)
|
||||
let idx = ? f[].readIndex()
|
||||
if idx.offsets.lenu64() != SLOTS_PER_HISTORICAL_ROOT:
|
||||
return err("Block index length invalid")
|
||||
|
||||
idx
|
||||
else:
|
||||
Index()
|
||||
|
||||
let res = EraFile(handle: f[], stateIdx: stateIdx, blockIdx: blockIdx)
|
||||
reset(f)
|
||||
|
||||
db.files.add(res)
|
||||
ok(res)
|
||||
|
||||
proc getBlockSZ*(
|
||||
db: EraDB, historical_roots: openArray[Eth2Digest], slot: Slot, bytes: var seq[byte]):
|
||||
Result[void, string] =
|
||||
## Get a snappy-frame-compressed version of the block data - may overwrite
|
||||
## `bytes` on error
|
||||
|
||||
# Block content for the blocks of an era is found in the file for the _next_
|
||||
# era
|
||||
let
|
||||
f = ? db.getEraFile(historical_roots, slot.era + 1)
|
||||
pos = f[].blockIdx.offsets[slot - f[].blockIdx.startSlot]
|
||||
|
||||
if pos == 0:
|
||||
return err("No block at given slot")
|
||||
|
||||
? f.handle.setFilePos(pos, SeekPosition.SeekBegin).mapErr(ioErrorMsg)
|
||||
|
||||
let header = ? f.handle.readRecord(bytes)
|
||||
if header.typ != SnappyBeaconBlock:
|
||||
return err("Invalid era file: didn't find block at index position")
|
||||
|
||||
ok()
|
||||
|
||||
proc getBlockSSZ*(
|
||||
db: EraDB, historical_roots: openArray[Eth2Digest], slot: Slot,
|
||||
bytes: var seq[byte]): Result[void, string] =
|
||||
var tmp: seq[byte]
|
||||
? db.getBlockSZ(historical_roots, slot, tmp)
|
||||
|
||||
try:
|
||||
bytes = framingFormatUncompress(tmp)
|
||||
ok()
|
||||
except CatchableError as exc:
|
||||
err(exc.msg)
|
||||
|
||||
proc getBlock*(
|
||||
db: EraDB, historical_roots: openArray[Eth2Digest], slot: Slot,
|
||||
root: Opt[Eth2Digest], T: type ForkyTrustedSignedBeaconBlock): Opt[T] =
|
||||
var tmp: seq[byte]
|
||||
? db.getBlockSSZ(historical_roots, slot, tmp).mapErr(proc(x: auto) = discard)
|
||||
|
||||
result.ok(default(T))
|
||||
try:
|
||||
readSszBytes(tmp, result.get(), updateRoot = root.isNone)
|
||||
if root.isSome():
|
||||
result.get().root = root.get()
|
||||
except CatchableError as exc:
|
||||
result.err()
|
||||
|
||||
proc getStateSZ*(
|
||||
db: EraDB, historical_roots: openArray[Eth2Digest], slot: Slot,
|
||||
bytes: var seq[byte]):
|
||||
Result[void, string] =
|
||||
## Get a snappy-frame-compressed version of the state data - may overwrite
|
||||
## `bytes` on error
|
||||
## https://github.com/google/snappy/blob/8dd58a519f79f0742d4c68fbccb2aed2ddb651e8/framing_format.txt#L34
|
||||
|
||||
# Block content for the blocks of an era is found in the file for the _next_
|
||||
# era
|
||||
let
|
||||
f = ? db.getEraFile(historical_roots, slot.era)
|
||||
|
||||
if f.stateIdx.startSlot != slot:
|
||||
return err("State not found in era file")
|
||||
|
||||
let pos = f.stateIdx.offsets[0]
|
||||
if pos == 0:
|
||||
return err("No state at given slot")
|
||||
|
||||
? f.handle.setFilePos(pos, SeekPosition.SeekBegin).mapErr(ioErrorMsg)
|
||||
|
||||
let header = ? f.handle.readRecord(bytes)
|
||||
if header.typ != SnappyBeaconState:
|
||||
return err("Invalid era file: didn't find state at index position")
|
||||
|
||||
ok()
|
||||
|
||||
proc getStateSSZ*(
|
||||
db: EraDB, historical_roots: openArray[Eth2Digest], slot: Slot,
|
||||
bytes: var seq[byte]): Result[void, string] =
|
||||
var tmp: seq[byte]
|
||||
? db.getStateSZ(historical_roots, slot, tmp)
|
||||
|
||||
try:
|
||||
bytes = framingFormatUncompress(tmp)
|
||||
ok()
|
||||
except CatchableError as exc:
|
||||
err(exc.msg)
|
||||
|
||||
type
|
||||
PartialBeaconState = object
|
||||
# The first bytes of a beacon state object are (for now) shared between all
|
||||
# forks - we exploit this to speed up loading
|
||||
|
||||
# Versioning
|
||||
genesis_time*: uint64
|
||||
genesis_validators_root*: Eth2Digest
|
||||
slot*: Slot
|
||||
fork*: Fork
|
||||
|
||||
# History
|
||||
latest_block_header*: BeaconBlockHeader ##\
|
||||
## `latest_block_header.state_root == ZERO_HASH` temporarily
|
||||
|
||||
block_roots*: HashArray[Limit SLOTS_PER_HISTORICAL_ROOT, Eth2Digest] ##\
|
||||
## Needed to process attestations, older to newer
|
||||
|
||||
proc getPartialState(
|
||||
db: EraDB, historical_roots: openArray[Eth2Digest], slot: Slot,
|
||||
output: var PartialBeaconState): bool =
|
||||
# TODO don't read all bytes: we only need a few, and shouldn't decompress the
|
||||
# rest - our snappy impl is very slow, in part to the crc32 check it
|
||||
# performs
|
||||
var tmp: seq[byte]
|
||||
if (let e = db.getStateSSZ(historical_roots, slot, tmp); e.isErr):
|
||||
debugecho e.error()
|
||||
return false
|
||||
|
||||
static: doAssert isFixedSize(PartialBeaconState)
|
||||
const partialBytes = fixedPortionSize(PartialBeaconState)
|
||||
|
||||
try:
|
||||
readSszBytes(tmp.toOpenArray(0, partialBytes - 1), output)
|
||||
true
|
||||
except CatchableError as exc:
|
||||
# TODO log?
|
||||
false
|
||||
|
||||
iterator getBlockIds*(
|
||||
db: EraDB, historical_roots: openArray[Eth2Digest], era: Era): BlockId =
|
||||
# The state from which we load block roots is stored in the file corresponding
|
||||
# to the "next" era
|
||||
let fileEra = era + 1
|
||||
|
||||
var
|
||||
state = (ref PartialBeaconState)() # avoid stack overflow
|
||||
|
||||
# `case` ensures we're on a fork for which the `PartialBeaconState`
|
||||
# definition is consistent
|
||||
case db.cfg.stateForkAtEpoch(fileEra.start_slot().epoch)
|
||||
of BeaconStateFork.Phase0, BeaconStateFork.Altair, BeaconStateFork.Bellatrix:
|
||||
if not getPartialState(db, historical_roots, fileEra.start_slot(), state[]):
|
||||
state = nil # No `return` in iterators
|
||||
|
||||
if state != nil:
|
||||
var
|
||||
slot = era.start_slot()
|
||||
for root in state[].block_roots:
|
||||
yield BlockId(root: root, slot: slot)
|
||||
slot += 1
|
||||
|
||||
proc new*(
|
||||
T: type EraDB, cfg: RuntimeConfig, path: string,
|
||||
genesis_validators_root: Eth2Digest): EraDB =
|
||||
EraDb(cfg: cfg, path: path, genesis_validators_root: genesis_validators_root)
|
||||
|
||||
when isMainModule:
|
||||
# Testing EraDB gets messy because of the large amounts of data involved:
|
||||
# this snippet contains some sanity checks for mainnet at least
|
||||
|
||||
import
|
||||
os,
|
||||
stew/arrayops
|
||||
|
||||
let
|
||||
dbPath =
|
||||
if os.paramCount() == 1: os.paramStr(1)
|
||||
else: "era"
|
||||
|
||||
db = EraDB.new(
|
||||
defaultRuntimeConfig, dbPath,
|
||||
Eth2Digest(
|
||||
data: array[32, byte].initCopyFrom([byte 0x4b, 0x36, 0x3d, 0xb9])))
|
||||
historical_roots = [
|
||||
Eth2Digest(
|
||||
data: array[32, byte].initCopyFrom([byte 0x40, 0xcf, 0x2f, 0x3c]))]
|
||||
|
||||
var got8191 = false
|
||||
var slot4: Eth2Digest
|
||||
for bid in db.getBlockIds(historical_roots, Era(0)):
|
||||
if bid.slot == Slot(1):
|
||||
doAssert bid.root == Eth2Digest.fromHex(
|
||||
"0xbacd20f09da907734434f052bd4c9503aa16bab1960e89ea20610d08d064481c")
|
||||
elif bid.slot == Slot(4):
|
||||
slot4 = bid.root
|
||||
elif bid.slot == Slot(5) and bid.root != slot4:
|
||||
raiseAssert "this slot was skipped, should have same root"
|
||||
elif bid.slot == Slot(8191):
|
||||
doAssert bid.root == Eth2Digest.fromHex(
|
||||
"0x48ea23af46320b0290eae668b0c3e6ae3e0534270f897db0e83a57f51a22baca")
|
||||
got8191 = true
|
||||
|
||||
doAssert db.getBlock(
|
||||
historical_roots, Slot(1), Opt[Eth2Digest].err(),
|
||||
phase0.TrustedSignedBeaconBlock).get().root ==
|
||||
Eth2Digest.fromHex(
|
||||
"0xbacd20f09da907734434f052bd4c9503aa16bab1960e89ea20610d08d064481c")
|
||||
|
||||
doAssert got8191
|
||||
|
|
@ -33,6 +33,8 @@ export proto_array.len
|
|||
# Forward declarations
|
||||
# ----------------------------------------------------------------------
|
||||
|
||||
type Index = fork_choice_types.Index
|
||||
|
||||
func compute_deltas(
|
||||
deltas: var openArray[Delta],
|
||||
indices: Table[Eth2Digest, Index],
|
||||
|
|
|
|||
|
|
@ -169,7 +169,7 @@ proc loadChainDag(
|
|||
if config.serveLightClientData: onOptimisticLightClientUpdate
|
||||
else: nil
|
||||
dag = ChainDAGRef.init(
|
||||
cfg, db, validatorMonitor, chainDagFlags,
|
||||
cfg, db, validatorMonitor, chainDagFlags, config.eraDir,
|
||||
onBlockAdded, onHeadChanged, onChainReorg,
|
||||
onOptimisticLCUpdateCb = onOptimisticLightClientUpdateCb,
|
||||
serveLightClientData = config.serveLightClientData,
|
||||
|
|
@ -242,6 +242,9 @@ proc initFullNode(
|
|||
func getBackfillSlot(): Slot =
|
||||
dag.backfill.slot
|
||||
|
||||
func getFrontfillSlot(): Slot =
|
||||
dag.frontfill.slot
|
||||
|
||||
let
|
||||
quarantine = newClone(
|
||||
Quarantine.init())
|
||||
|
|
@ -274,11 +277,11 @@ proc initFullNode(
|
|||
syncManager = newSyncManager[Peer, PeerID](
|
||||
node.network.peerPool, SyncQueueKind.Forward, getLocalHeadSlot,
|
||||
getLocalWallSlot, getFirstSlotAtFinalizedEpoch, getBackfillSlot,
|
||||
dag.tail.slot, blockVerifier)
|
||||
getFrontfillSlot, dag.tail.slot, blockVerifier)
|
||||
backfiller = newSyncManager[Peer, PeerID](
|
||||
node.network.peerPool, SyncQueueKind.Backward, getLocalHeadSlot,
|
||||
getLocalWallSlot, getFirstSlotAtFinalizedEpoch, getBackfillSlot,
|
||||
dag.backfill.slot, blockVerifier, maxHeadAge = 0)
|
||||
getFrontfillSlot, dag.backfill.slot, blockVerifier, maxHeadAge = 0)
|
||||
|
||||
dag.setFinalizationCb makeOnFinalizationCb(node.eventBus, node.eth1Monitor)
|
||||
|
||||
|
|
|
|||
|
|
@ -59,7 +59,7 @@ const
|
|||
|
||||
# TODO when https://github.com/nim-lang/Nim/issues/14440 lands in Status's Nim,
|
||||
# switch proc {.noSideEffect.} to func.
|
||||
template ethTimeUnit(typ: type) {.dirty.} =
|
||||
template ethTimeUnit*(typ: type) {.dirty.} =
|
||||
proc `+`*(x: typ, y: uint64): typ {.borrow, noSideEffect.}
|
||||
proc `-`*(x: typ, y: uint64): typ {.borrow, noSideEffect.}
|
||||
proc `-`*(x: uint64, y: typ): typ {.borrow, noSideEffect.}
|
||||
|
|
|
|||
|
|
@ -113,6 +113,7 @@ proc newSyncManager*[A, B](pool: PeerPool[A, B],
|
|||
getLocalWallSlotCb: GetSlotCallback,
|
||||
getFinalizedSlotCb: GetSlotCallback,
|
||||
getBackfillSlotCb: GetSlotCallback,
|
||||
getFrontfillSlotCb: GetSlotCallback,
|
||||
progressPivot: Slot,
|
||||
blockVerifier: BlockVerifier,
|
||||
maxHeadAge = uint64(SLOTS_PER_EPOCH * 1),
|
||||
|
|
@ -124,8 +125,7 @@ proc newSyncManager*[A, B](pool: PeerPool[A, B],
|
|||
of SyncQueueKind.Forward:
|
||||
(getLocalHeadSlotCb, getLocalWallSlotCb, getFinalizedSlotCb)
|
||||
of SyncQueueKind.Backward:
|
||||
(getBackfillSlotCb, GetSlotCallback(proc(): Slot = Slot(0)),
|
||||
getBackfillSlotCb)
|
||||
(getBackfillSlotCb, getFrontfillSlotCb, getBackfillSlotCb)
|
||||
|
||||
var res = SyncManager[A, B](
|
||||
pool: pool,
|
||||
|
|
|
|||
|
|
@ -164,9 +164,10 @@ Each era is identified by when it ends. Thus, the genesis era is era 0, followed
|
|||
* `era-number` is the number of the _last_ era stored in the file - for example, the genesis era file has number 0 - as a 5-digit 0-filled decimal integer
|
||||
* `era-count` is the number of eras stored in the file, as a 5-digit 0-filled decimal integer
|
||||
* `short-historical-root` is the first 4 bytes of the last historical root in the last state in the era file, lower-case hex-encoded (8 characters), except the genesis era which instead uses the `genesis_validators_root` field from the genesis state.
|
||||
* The root is available as `state.historical_roots[era - 1]` except genesis, whose historical root is all `0`
|
||||
* The root is available as `state.historical_roots[era - 1]` except for genesis, which is `state.genesis_validators_root`
|
||||
* Era files with multiple eras use the root of the highest era - this determines the earlier eras as well
|
||||
|
||||
An era file containing the mainnet genesis is thus named `mainnet-00000000-0000-0001.era`, and the era after that `mainnet-40cf2f3c-0001-0001.era`.
|
||||
An era file containing the mainnet genesis is thus named `mainnet-00000-00001-4b363db9.era`, and the era after that `mainnet-00001-00001-40cf2f3c.era`.
|
||||
|
||||
## Structure
|
||||
|
||||
|
|
@ -174,16 +175,16 @@ An `.era` file is structured in the following way:
|
|||
|
||||
```
|
||||
era := group+
|
||||
group := Version | block* | canonical-state | other-entries* | slot-index(block)? | slot-index(state)
|
||||
group := Version | block* | era-state | other-entries* | slot-index(block)? | slot-index(state)
|
||||
block := CompressedSignedBeaconBlock
|
||||
canonical-state := CompressedBeaconState
|
||||
era-state := CompressedBeaconState
|
||||
```
|
||||
|
||||
The `block` entries of a group include all blocks pertaining to an era. For example, the group representing era one will have all blocks from slot 0 up to and including block 8191.
|
||||
|
||||
The `canonical-state` is the state of the slot that immediately follows the end of the era without applying blocks from the next era. For example, era 1 that covers the first 8192 slots will have all blocks applied up to slot 8191 and will `process_slots` up to 8192. The genesis group contains only the genesis state but no blocks.
|
||||
The `era-state` is the state of the slot that immediately follows the end of the era without applying blocks from the next era. For example, era 1 that covers the first 8192 slots will have all blocks applied up to slot 8191 and will `process_slots` up to 8192. The genesis group contains only the genesis state but no blocks.
|
||||
|
||||
`slot-index(state)` is a `SlotIndex` entry with `count = 1` for the `CompressedBeaconState` entry of that era, pointing out the offset where the state entry begins. (TODO: consider count > 1 for files that cover multiple eras - breaks trivial composability of each era snippet but allows instant lookup in multi-era files)
|
||||
`slot-index(state)` is a `SlotIndex` entry with `count = 1` for the `CompressedBeaconState` entry of that era, pointing out the offset where the state entry begins.
|
||||
|
||||
`slot-index(block)` is a `SlotIndex` entry with `count = SLOTS_PER_HISTORICAL_ROOT` for the `CompressedSignedBeaconBlock` entries in that era, pointing out the offsets of each block in the era. It is omitted for the genesis era.
|
||||
|
||||
|
|
@ -279,9 +280,12 @@ An era is typically 8192 slots, or roughly 27.3 hours - a bit more than a day.
|
|||
|
||||
Era files will store execution block contents, but not execution states (these are too large) - a full era history thus gives the full ethereum history from the merge onwards, for convenient cold storage.
|
||||
|
||||
## What is a "canonical state" and why use it?
|
||||
## What is a "era state" and why use it?
|
||||
|
||||
The state transition function in ethereum does 3 things: slot processing, epoch processing and block processing, in that order. In particular, the slot and epoch processing is done for every slot and epoch, but the block processing may be skipped. When epoch processing is done, all the epoch-related fields in the state have been written, and a new epoch can begin - it's thus reasonable to say that the epoch processing is the last thing that happens in an epoch and the block processing happens in the context of the new epoch.
|
||||
|
||||
Storing the "canonical state" without the block applied means that any block from the new epoch can be applied to it - if two histories exist, one that skips the first block in the epoch and one that includes it, one can use the same canonical state in both cases.
|
||||
Storing the "era state" without the block applied means that any block from the new epoch can be applied to it - if two histories exist, one that skips the first block in the epoch and one that includes it, one can use the same era state in both cases.
|
||||
|
||||
One downside is that future blocks will store the state root of the "era state" with the block applied, making it slightly harder to verify that the state in a given era file is part of a particular history.
|
||||
|
||||
TODO: consider workarounds for the above point - one can state-transition to find the right state root, but that increases verification requirements significantly.
|
||||
|
|
|
|||
|
|
@ -4,9 +4,14 @@ import
|
|||
std/strformat,
|
||||
stew/[arrayops, endians2, io2, results],
|
||||
snappy, snappy/framing,
|
||||
../beacon_chain/spec/forks,
|
||||
../beacon_chain/spec/[beacon_time, forks],
|
||||
../beacon_chain/spec/eth2_ssz_serialization
|
||||
|
||||
export io2
|
||||
|
||||
type
|
||||
Era* = distinct uint64 # Time unit, similar to slot
|
||||
|
||||
const
|
||||
E2Version* = [byte 0x65, 0x32]
|
||||
E2Index* = [byte 0x69, 0x32]
|
||||
|
|
@ -18,7 +23,10 @@ const
|
|||
LengthFieldLen = 6
|
||||
HeaderFieldLen = TypeFieldLen + LengthFieldLen
|
||||
|
||||
FAR_FUTURE_ERA* = Era(not 0'u64)
|
||||
|
||||
type
|
||||
|
||||
Type* = array[2, byte]
|
||||
|
||||
Header* = object
|
||||
|
|
@ -33,19 +41,32 @@ type
|
|||
startSlot*: Slot
|
||||
offsets*: seq[int64] # Absolute positions in file
|
||||
|
||||
ethTimeUnit Era
|
||||
|
||||
func era*(s: Slot): Era =
|
||||
if s == FAR_FUTURE_SLOT: FAR_FUTURE_ERA
|
||||
else: Era(s div SLOTS_PER_HISTORICAL_ROOT)
|
||||
|
||||
func start_slot*(e: Era): Slot =
|
||||
const maxEra = Era(FAR_FUTURE_SLOT div SLOTS_PER_HISTORICAL_ROOT)
|
||||
if e >= maxEra: FAR_FUTURE_SLOT
|
||||
else: Slot(e.uint64 * SLOTS_PER_HISTORICAL_ROOT)
|
||||
|
||||
proc toString(v: IoErrorCode): string =
|
||||
try: ioErrorMsg(v)
|
||||
except Exception as e: raiseAssert e.msg
|
||||
|
||||
func eraFileName*(cfg: RuntimeConfig, state: ForkyBeaconState, era: uint64): string =
|
||||
func eraFileName*(
|
||||
cfg: RuntimeConfig, genesis_validators_root: Eth2Digest,
|
||||
historical_roots: openArray[Eth2Digest], era: Era): string =
|
||||
try:
|
||||
let
|
||||
historicalRoot =
|
||||
if era == 0: state.genesis_validators_root
|
||||
elif era > state.historical_roots.lenu64(): Eth2Digest()
|
||||
else: state.historical_roots.asSeq()[era - 1]
|
||||
if era == Era(0): genesis_validators_root
|
||||
elif era > historical_roots.lenu64(): Eth2Digest()
|
||||
else: historical_roots[int(uint64(era)) - 1]
|
||||
|
||||
&"{cfg.name()}-{era.int:05}-{1:05}-{shortLog(historicalRoot)}.era"
|
||||
&"{cfg.name()}-{era.uint64:05}-{1:05}-{shortLog(historicalRoot)}.era"
|
||||
except ValueError as exc:
|
||||
raiseAssert exc.msg
|
||||
|
||||
|
|
@ -186,10 +207,13 @@ proc readIndex*(f: IoHandle): Result[Index, string] =
|
|||
for i in 0..<count:
|
||||
? f.readFileExact(buf)
|
||||
|
||||
let offset = uint64.fromBytesLE(buf)
|
||||
|
||||
# Wrapping math is actually convenient here
|
||||
let absolute = cast[int64](cast[uint64](startPos) + offset)
|
||||
let
|
||||
offset = uint64.fromBytesLE(buf)
|
||||
absolute =
|
||||
if offset == 0: 0'i64
|
||||
else:
|
||||
# Wrapping math is actually convenient here
|
||||
cast[int64](cast[uint64](startPos) + offset)
|
||||
|
||||
if absolute < 0 or absolute > fileSize: return err("Invalid offset")
|
||||
offsets[i] = absolute
|
||||
|
|
|
|||
|
|
@ -423,11 +423,11 @@ proc cmdRewindState(conf: DbConf, cfg: RuntimeConfig) =
|
|||
dump("./", state)
|
||||
do: raiseAssert "withUpdatedState failed"
|
||||
|
||||
func atCanonicalSlot(blck: BlockRef, slot: Slot): BlockSlot =
|
||||
func atCanonicalSlot(dag: ChainDAGRef, bid: BlockId, slot: Slot): Opt[BlockSlotId] =
|
||||
if slot == 0:
|
||||
blck.atSlot(slot)
|
||||
ok dag.genesis.atSlot()
|
||||
else:
|
||||
blck.atSlot(slot - 1).blck.atSlot(slot)
|
||||
ok BlockSlotId.init((? dag.atSlot(bid, slot - 1)).bid, slot)
|
||||
|
||||
proc cmdExportEra(conf: DbConf, cfg: RuntimeConfig) =
|
||||
let db = BeaconChainDB.new(conf.databaseDir.string, readOnly = true)
|
||||
|
|
@ -451,21 +451,29 @@ proc cmdExportEra(conf: DbConf, cfg: RuntimeConfig) =
|
|||
tmp: seq[byte]
|
||||
timers: array[Timers, RunningStat]
|
||||
|
||||
var era = conf.era
|
||||
while conf.eraCount == 0 or era < conf.era + conf.eraCount:
|
||||
var era = Era(conf.era)
|
||||
while conf.eraCount == 0 or era < Era(conf.era) + conf.eraCount:
|
||||
if shouldShutDown: quit QuitSuccess
|
||||
# Era files hold the blocks for the "previous" era, and the first state in
|
||||
# the era itself
|
||||
let
|
||||
firstSlot =
|
||||
if era == 0: none(Slot)
|
||||
else: some(Slot((era - 1) * SLOTS_PER_HISTORICAL_ROOT))
|
||||
endSlot = Slot(era * SLOTS_PER_HISTORICAL_ROOT)
|
||||
canonical = dag.head.atCanonicalSlot(endSlot)
|
||||
else: some((era - 1).start_slot)
|
||||
endSlot = era.start_slot
|
||||
canonical = dag.atCanonicalSlot(dag.head.bid, endSlot).valueOr:
|
||||
echo "Skipping ", era, ", blocks not available"
|
||||
continue
|
||||
|
||||
if endSlot > dag.head.slot:
|
||||
echo "Written all complete eras"
|
||||
break
|
||||
|
||||
let name = withState(dag.headState): eraFileName(cfg, state.data, era)
|
||||
let name = withState(dag.headState):
|
||||
eraFileName(
|
||||
cfg, state.data.genesis_validators_root,
|
||||
state.data.historical_roots.asSeq, era)
|
||||
|
||||
if isFile(name):
|
||||
echo "Skipping ", name, " (already exists)"
|
||||
else:
|
||||
|
|
@ -483,7 +491,7 @@ proc cmdExportEra(conf: DbConf, cfg: RuntimeConfig) =
|
|||
group.update(e2, blocks[i].slot, tmp).get()
|
||||
|
||||
withTimer(timers[tState]):
|
||||
dag.withUpdatedState(tmpState[], canonical.toBlockSlotId().expect("not nil")) do:
|
||||
dag.withUpdatedState(tmpState[], canonical) do:
|
||||
withState(state):
|
||||
group.finish(e2, state.data).get()
|
||||
do: raiseAssert "withUpdatedState failed"
|
||||
|
|
|
|||
Loading…
Reference in New Issue