mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 21:07:18 +00:00
5569a68452
* Value assigned to a variable is never read before being overwritten * The result of append is not used anywhere * Suspicious assignment of range-loop vars detected * Unused method receiver detected * Revert "Auxiliary commit to revert individual files from 54edcb445484a2e5d79612e19af8e949b8861253" This reverts commit bbd1e1beabf7b0c5cfc4f514dcc820062ad6c063. * Method modifies receiver * Fix test * Duplicate imports detected * Incorrectly formatted error string * Types of function parameters can be combined * One more "Unused method receiver detected" * Unused parameter detected in function
98 lines
3.6 KiB
Go
98 lines
3.6 KiB
Go
package blockchain
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"strconv"
|
|
|
|
"github.com/pkg/errors"
|
|
types "github.com/prysmaticlabs/eth2-types"
|
|
"github.com/prysmaticlabs/prysm/async"
|
|
"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
|
|
"github.com/prysmaticlabs/prysm/beacon-chain/core/transition"
|
|
"github.com/prysmaticlabs/prysm/beacon-chain/state"
|
|
"github.com/prysmaticlabs/prysm/config/params"
|
|
"github.com/prysmaticlabs/prysm/encoding/bytesutil"
|
|
ethpb "github.com/prysmaticlabs/prysm/proto/prysm/v1alpha1"
|
|
"github.com/prysmaticlabs/prysm/time/slots"
|
|
)
|
|
|
|
// getAttPreState retrieves the att pre state by either from the cache or the DB.
|
|
func (s *Service) getAttPreState(ctx context.Context, c *ethpb.Checkpoint) (state.BeaconState, error) {
|
|
// Use a multilock to allow scoped holding of a mutex by a checkpoint root + epoch
|
|
// allowing us to behave smarter in terms of how this function is used concurrently.
|
|
epochKey := strconv.FormatUint(uint64(c.Epoch), 10 /* base 10 */)
|
|
lock := async.NewMultilock(string(c.Root) + epochKey)
|
|
lock.Lock()
|
|
defer lock.Unlock()
|
|
cachedState, err := s.checkpointStateCache.StateByCheckpoint(c)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "could not get cached checkpoint state")
|
|
}
|
|
if cachedState != nil && !cachedState.IsNil() {
|
|
return cachedState, nil
|
|
}
|
|
|
|
baseState, err := s.cfg.StateGen.StateByRoot(ctx, bytesutil.ToBytes32(c.Root))
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "could not get pre state for epoch %d", c.Epoch)
|
|
}
|
|
|
|
epochStartSlot, err := slots.EpochStart(c.Epoch)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if epochStartSlot > baseState.Slot() {
|
|
baseState, err = transition.ProcessSlots(ctx, baseState, epochStartSlot)
|
|
if err != nil {
|
|
return nil, errors.Wrapf(err, "could not process slots up to epoch %d", c.Epoch)
|
|
}
|
|
}
|
|
|
|
// Sharing the same state across caches is perfectly fine here, the fetching
|
|
// of attestation prestate is by far the most accessed state fetching pattern in
|
|
// the beacon node. An extra state instance cached isn't an issue in the bigger
|
|
// picture.
|
|
if err := s.checkpointStateCache.AddCheckpointState(c, baseState); err != nil {
|
|
return nil, errors.Wrap(err, "could not save checkpoint state to cache")
|
|
}
|
|
return baseState, nil
|
|
|
|
}
|
|
|
|
// verifyAttTargetEpoch validates attestation is from the current or previous epoch.
|
|
func verifyAttTargetEpoch(_ context.Context, genesisTime, nowTime uint64, c *ethpb.Checkpoint) error {
|
|
currentSlot := types.Slot((nowTime - genesisTime) / params.BeaconConfig().SecondsPerSlot)
|
|
currentEpoch := slots.ToEpoch(currentSlot)
|
|
var prevEpoch types.Epoch
|
|
// Prevents previous epoch under flow
|
|
if currentEpoch > 1 {
|
|
prevEpoch = currentEpoch - 1
|
|
}
|
|
if c.Epoch != prevEpoch && c.Epoch != currentEpoch {
|
|
return fmt.Errorf("target epoch %d does not match current epoch %d or prev epoch %d", c.Epoch, currentEpoch, prevEpoch)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// verifyBeaconBlock verifies beacon head block is known and not from the future.
|
|
func (s *Service) verifyBeaconBlock(ctx context.Context, data *ethpb.AttestationData) error {
|
|
r := bytesutil.ToBytes32(data.BeaconBlockRoot)
|
|
b, err := s.cfg.BeaconDB.Block(ctx, r)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// If the block does not exist in db, check again if block exists in initial sync block cache.
|
|
// This could happen as the node first syncs to head.
|
|
if (b == nil || b.IsNil()) && s.hasInitSyncBlock(r) {
|
|
b = s.getInitSyncBlock(r)
|
|
}
|
|
if err := helpers.BeaconBlockIsNil(b); err != nil {
|
|
return err
|
|
}
|
|
if b.Block().Slot() > data.Slot {
|
|
return fmt.Errorf("could not process attestation for future block, block.Slot=%d > attestation.Data.Slot=%d", b.Block().Slot(), data.Slot)
|
|
}
|
|
return nil
|
|
}
|