Commit Graph

35 Commits

Author SHA1 Message Date
Etan Kissling 2722778ce5
reduce `nim-eth` dependencies just for RNG (#5099)
We have several modules that import `nim-eth` for the sole purpose of
its `keys.newRng` function. This function is meanwhile a simple wrapper
around `nim-bearssl`'s `HmacDrbgContext.new()`, so the import doesn't
really serve a use anymore. Replace `keys.newRng` with the direct call
to reduce `nim-eth` imports.
2023-06-19 22:43:50 +00:00
Etan Kissling dbba003a38
Revert "Revert "accelerate `getShufflingRef` (#4911)" (#4958)"
This reverts commit 748be8b67b.
2023-05-15 17:41:40 +02:00
Etan Kissling 748be8b67b
Revert "accelerate `getShufflingRef` (#4911)" (#4958)
This reverts commit ea97e93e74.
2023-05-15 15:25:51 +00:00
tersec 10a7281349
don't run flaky CI in Windows (#4935)
* don't run flaky CI in Windows

* reduce stack size in `test_light_client`

* regen tests

* re-enable maybe non-problematic test module on Windows

---------

Co-authored-by: Etan Kissling <etan@status.im>
2023-05-15 04:14:58 +02:00
Etan Kissling ea97e93e74
accelerate `getShufflingRef` (#4911)
When an uncached `ShufflingRef` is requested, we currently replay state
which can take several seconds. Acceleration is possible by:

1. Start from any state with locked-in `get_active_validator_indices`.
   Any blocks / slots applied to such a state can only affect that
   result for future epochs, so are viable for querying target epoch.
   `compute_activation_exit_epoch(state.slot.epoch) > target.epoch`

2. Determine highest common ancestor among `state` and `target.blck`.
   At the ancestor slot, same rules re `get_active_validator_indices`.
   `compute_activation_exit_epoch(ancestorSlot.epoch) > target.epoch`

3. We now have a `state` that shares history with `target.blck` up
   through a common ancestor slot. Any blocks / slots that the `state`
   contains, which are not part of the `target.blck` history, affect
   `get_active_validator_indices` at epochs _after_ `target.epoch`.

4. Select `state.randao_mixes[N]` that is closest to common ancestor.
   Either direction is fine (above / below ancestor).

5. From that RANDAO mix, mix in / out all RANDAO reveals from blocks
   in-between. This is just an XOR operation, so fully reversible.
   `mix = mix xor SHA256(blck.message.body.randao_reveal)`

6. Compute the attester dependent slot from `target.epoch`.
   `if epoch >= 2: (target.epoch - 1).start_slot - 1 else: GENESIS_SLOT`

7. Trace back from `target.blck` to the attester dependent slot.
   We now have the destination for which we want to obtain RANDAO.

8. Mix in all RANDAO reveals from blocks up through the `dependentBlck`.
   Same method, no special handling necessary for epoch transitions.

9. Combine `get_active_validator_indices` from `state` at `target.epoch`
   with the recovered RANDAO value at `dependentBlck` to obtain the
   requested shuffling, and construct the `ShufflingRef` without replay.

* more tests and simplify logic

* test with different number of deposits per branch

* Update beacon_chain/consensus_object_pools/blockchain_dag.nim

Co-authored-by: Jacek Sieka <jacek@status.im>

* `commonAncestor` tests

* lint

---------

Co-authored-by: Jacek Sieka <jacek@status.im>
2023-05-12 19:36:59 +02:00
Etan Kissling f0dcbaacff
extend `addTestBlock` with Capella/Deneb support (#4728)
* extend `addTestBlock` with Capella/Deneb support

* bump copyright years

* fix
2023-03-11 20:11:33 +00:00
Etan Kissling 57b2151f95
rename `EIP4844` > `Deneb` for light client (#4713)
* rename `EIP4844` > `Deneb` for light client

* regenerate test logs
2023-03-10 17:16:26 +00:00
Etan Kissling b0577bdc6c
rename `OnEIP4844BlockAdded` > `OnDenebBlockAdded` (#4714) 2023-03-10 17:14:27 +00:00
tersec e3d96ef147
rename most eip4844Data to denebData (#4693) 2023-03-04 22:23:52 +00:00
tersec 3b41e6a0e7
rename ConsensusFork.EIP4844 to ConsensusFork.Deneb (#4692) 2023-03-04 13:35:39 +00:00
tersec d058aa09c8
more withdrowls (#4674) 2023-03-02 17:13:35 +01:00
zah 067ba13c52
Capella metadata for Sepolia (#4615)
Other changes:

Renamed the `EIP_4844_FORK_*` config constants to `DENEB_FORK_*` as
this matches the latest spec and it's already used in the official
Sepolia config.
2023-02-15 14:44:09 +00:00
tersec 0fb726c420
`BeaconStateFork/BeaconBlockFork` -> `ConsensusFork` (#4560)
* `BeaconStateFork/BeaconBlockFork` -> `ConsensusFork`

* revert unrelated change

* revert unrelated changes

* update test summaries
2023-01-28 19:53:41 +00:00
Etan Kissling fda03548e3
use `ForkedLightClientStore` internally (#4512)
When running `nimbus_light_client`, we persist the latest header from
`LightClientStore.finalized_header` in a database across restarts.
Because the data format is derived from the latest `LightClientStore`,
this could lead to data being persisted in pre-release formats.

To enable us to test later `LightClientStore` versions on devnets,
transition to a `ForkedLightClientStore` internally that is only
migrated to newer forks on-demand (instead of starting at latest).
2023-01-16 16:53:45 +01:00
Etan Kissling 609227559f
LC data fork cleanup (#4506)
Distinguish between those code locations that need to be updated on each
light client data format change, and those others that should generally
be fine, as long as a valid light client object is processed.

The former are tagged with static assert for `LightClientDataFork.high`.

The latter are changed to `lcDataFork > LightClientDataFork.None` to
indicate that they depend only on presence of any valid object.
Also bundled a few minor cleanups and fixes.

Also add `Forky` type for `LightClientStore` and minor fixes / cleanups.
2023-01-14 22:19:50 +01:00
Etan Kissling 2324136552
add `LightClientHeader` wrapper (#4481)
The light client data structures were changed to accommodate additional
fields in future forks (e.g., to also hold execution data).

There is a minor change to the JSON serialization, where the `header`
properties are now nested inside a `LightClientHeader`.
The SSZ serialization remains compatible.

See https://github.com/ethereum/consensus-specs/pull/3190
and https://github.com/ethereum/beacon-APIs/pull/287
2023-01-13 16:46:35 +01:00
Etan Kissling 7e276937dc
make LC data fork aware (#4493)
In a future fork, light client data will be extended with execution info
to support more use cases. To anticipate such an upgrade, introduce
`Forky` and `Forked` types, and ready the database schema.
Because the mapping of sync committee periods to fork versions is not
necessarily unique (fork schedule not in sync with period boundaries),
an additional column is added to `period` -> `LightClientUpdate` table.
2023-01-12 18:11:38 +01:00
tersec dee5af58d6
eip4844 light client tests; avoid case object out-of-bound array reads (#4404) 2022-12-08 17:21:53 +01:00
henridf f0329b2212
Types and scaffolding for EIP-4844 (#4365)
* Types and scaffolding for EIP-4844

This commit adds the EIP-4844 spec types, and fills in
scaffolding/boilerplate for the use of these types across the repo.

None of the actual EIP-4844 logic is introduced yet.

This follows the pattern used by @tersec when introducing Capella (#4276).

* use eth2-networks fork

* review feedback: add static check EIP4844_FORK_EPOCH == FAR_FUTURE_EPOCH

* review feedback: remove EIP4844 from /eth/v1/config/spec response

* Cleanup / review feedback

* Fix REST test
2022-12-05 16:29:09 +00:00
tersec 38827d776c
capella gossip support (#4386) 2022-12-04 08:42:03 +01:00
tersec 5b46f0b723
add Capella support to Forked* (#4276)
* add Capella support to Forked*

* remove cruft

* add `OnForkyBlockAdded`
2022-11-02 16:23:30 +00:00
Jacek Sieka d839b9d07e
State-only checkpoint state startup (#4251)
Currently, we require genesis and a checkpoint block and state to start
from an arbitrary slot - this PR relaxes this requirement so that we can
start with a state alone.

The current trusted-node-sync algorithm works by first downloading
blocks until we find an epoch aligned non-empty slot, then downloads the
state via slot.

However, current
[proposals](https://github.com/ethereum/beacon-APIs/pull/226) for
checkpointing prefer finalized state as
the main reference - this allows more simple access control and caching
on the server side - in particular, this should help checkpoint-syncing
from sources that have a fast `finalized` state download (like infura
and teku) but are slow when accessing state via slot.

Earlier versions of Nimbus will not be able to read databases created
without a checkpoint block and genesis. In most cases, backfilling makes
the database compatible except where genesis is also missing (custom
networks).

* backfill checkpoint block from libp2p instead of checkpoint source,
when doing trusted node sync
* allow starting the client without genesis / checkpoint block
* perform epoch start slot lookahead when loading tail state, so as to
deal with the case where the epoch start slot does not have a block
* replace `--blockId` with `--state-id` in TNS command line
* when replaying, also look at the parent of the last-known-block (even
if we don't have the parent block data, we can still replay from a
"parent" state) - in particular, this clears the way for implementing
state pruning
* deprecate `--finalized-checkpoint-block` option (no longer needed)
2022-11-02 10:02:38 +00:00
Etan Kissling 5c8e58ea23
update LC spec references for v1.2.0-rc.2 (#3982)
Updates light client spec references for latest spec (no more `vFuture`)
2022-08-17 19:47:06 +00:00
Etan Kissling bc1cc8f643
encapsulate LC config into one type (#3817)
Separate LC initialization options from the main ChainDAGRef options to
allow ChainDAGRef to treat them as opaque and reduce risk for conflicts
when extending those options in the future.
2022-06-28 22:52:29 +02:00
Etan Kissling 52ba4f7999
rename light client config parameters (#3740)
For consistency with other options, use a common prefix for light client
data configuration options.

* `--serve-light-client-data` --> `--light-client-data-serve`
* `--import-light-client-data` --> `--light-client-data-import-mode`

No deprecation of the old identifiers as they were only sparingly used
and all usage can be easily updated without interferance.
2022-06-14 12:03:39 +03:00
tersec a07d14cd99
remove unused imports in tests/ (#3713) 2022-06-07 17:05:06 +00:00
Etan Kissling c808f17a37
update to latest light client libp2p protocol (#3623)
Incorporates the latest changes to the light client sync protocol based
on Devconnect AMS feedback. Note that this breaks compatibility with the
previous prototype, due to changes to data structures and endpoints.
See https://github.com/ethereum/consensus-specs/pull/2802
2022-05-23 14:02:54 +02:00
tersec 9e738a92b4
stylecheck fixes (#3595) 2022-04-15 12:46:56 +00:00
Jacek Sieka f70ff38b53
enable `styleCheck:usages` (#3573)
Some upstream repos still need fixes, but this gets us close enough that
style hints can be enabled by default.

In general, "canonical" spellings are preferred even if they violate
nep-1 - this applies in particular to spec-related stuff like
`genesis_validators_root` which appears throughout the codebase.
2022-04-08 16:22:49 +00:00
Etan Kissling fd1ffd62dd
update light client server for DAG failure modes (#3514)
Gracefully handles the new failure modes recently introduced to the DAG
as part of https://github.com/status-im/nimbus-eth2/pull/3513
Data that is deemed to exist but fails to load leads to an error log to
avoid suppressing logic errors accidentally. In `verifyFinalization`
mode, the assertions remain active.
2022-03-20 11:58:59 +01:00
Etan Kissling 18bd6df1b4
fix light client data collection for checkpoint sync (#3498)
When doing checkpoint sync, collecting light client data of known blocks
and states incorrectly assumes that `finalized_checkpoint` information
is also known. Hardens collection to only collect finalized checkpoint
data after `dag.computeEarliestLightClientSlot`.
2022-03-18 15:47:53 +01:00
Jacek Sieka c64bf045f3
remove StateData (#3507)
One more step on the journey to reduce `BlockRef` usage across the
codebase - this one gets rid of `StateData` whose job was to keep track
of which block was last assigned to a state - these duties have now been
taken over by `latest_block_root`, a fairly recent addition that
computes this block root from state data (at a small cost that should be
insignificant)

99% mechanical change.
2022-03-16 08:20:40 +01:00
Jacek Sieka a3bd01b58d
move dependent root computations to `BeaconState` / `EpochRef` (#3478)
* fewer deps on `BlockRef` traversal in anticipation of pruning
* allows identifying EpochRef:s by their shuffling as a first step of
* tighten error handling around missing blocks

using the zero hash for signalling "missing block" is fragile and easy
to miss - with checkpoint sync now, and pruning in the future, missing
blocks become "normal".
2022-03-15 09:24:55 +01:00
Etan Kissling 29e5a4a752
error and progress codes for light client sync (#3490)
When syncing as a light client, different behaviour is needed to handle
the various ways how errors may occur. The existing logic for blocks can
also be applied to light client objects:
- `Invalid`: Malformed object that is clearly an error by its producer.
- `MissingParent`: More data is needed to decide applicability.
- `UnviableFork`: Object may be valid but will never apply on this fork.
- `Duplicate`: No errors were encountered but the object was not useful.
2022-03-14 10:25:54 +01:00
Etan Kissling ae408c279a
add option to collect light client data (#3474)
Light clients require full nodes to serve additional data so that they
can stay in sync with the network. This patch adds a new launch option
`--import-light-client-data` to configure what data to make available.
For now, data is only kept in memory; it is not persisted at this time.
Note that data is only locally collected, a separate patch is needed to
actually make it availble over the network. `--serve-light-client-data`
will be used for serving data, but is not functional yet outside tests.
2022-03-11 21:28:10 +01:00