When a late block arrives and the beacon is proposing the next block, we
perform several checks to allow for the next block to reorg the incoming
late block.
Among those checks, we check that the parent block has been heavily
attested (currently 160% of the committee size).
We perform this check in these circumstances:
- When the late block arrives
- At 10 seconds into the slot
- At 0 seconds into the next slot (at proposing time)
The problem is that for blocks that arrive between 4 seconds and 10
seconds, the parent block will not have yet this expected weight since
attestations from the current committee were not imported yet, and thus
Prysm will send an FCU with payload attributes anyway at this time.
What happens is that Prysm keeps the EL building different blocks based
on different parents at the same time, when later in the next slot it
calls to propose, it will reorg the late block anyway and the EL would
have been computing a second payload uselessly.
This PR enables this check only when calling `ShouldOverrideFCU` after
10 seconds into the slot which we do only after having imported the
current attestations. We may want to actually remove this check entirely
from `ShouldOverrideFCU` and only keep it in `ProposerHead`.
Shout out to Anthithesis for reporting an issue that led to this
discoverly.
* First take at updating everything to v5
* Patch gRPC gateway to use prysm v5
Fix patch
* Update go ssz
---------
Co-authored-by: Preston Van Loon <pvanloon@offchainlabs.com>
* write locks
* fix forkchoice tests
* blockchain locks
* lock on IsOptimistic
* use forkchoice instead of chaininfo within savehead
* Use forkchoice HasNode to check if a block is consistent with finality
* interface fix
* Use forkchoice HasNode to check if a block is consistent with finality
* interface fix
* fix tests
* remove VerifyFinalizedBlkDescendant
* don't write lock wrappers
* fix validateBeaconBlock
* Terence's review and more missing locks
* add lock for InForkChoice
* lock head on fillMissingBlockPayload
* fix lock on IsOptimisticForRoot
* fix lock in fillMissingBlockPayloadId
* extra comments
* lock proposerBoost on spectests
* nishant's review
---------
Co-authored-by: Nishant Das <nishdas93@gmail.com>
* Implement should_override_forchoice_update
* add tests
* remove unused exported function
* go mod tidy
* fix go mod
* Fix go mod tidy
* Fix context import
* mod tidy
* fix test
* Terence's review
* fix test
---------
Co-authored-by: terence tsao <terence@prysmaticlabs.com>
