mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-25 04:47:18 +00:00
5169209360
* archiving information properly * tests passing * broken test fix
174 lines
6.0 KiB
Go
174 lines
6.0 KiB
Go
package archiver
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
|
|
"github.com/pkg/errors"
|
|
"github.com/prysmaticlabs/prysm/beacon-chain/blockchain"
|
|
"github.com/prysmaticlabs/prysm/beacon-chain/core/epoch"
|
|
"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
|
|
"github.com/prysmaticlabs/prysm/beacon-chain/core/validators"
|
|
"github.com/prysmaticlabs/prysm/beacon-chain/db"
|
|
pb "github.com/prysmaticlabs/prysm/proto/beacon/p2p/v1"
|
|
ethpb "github.com/prysmaticlabs/prysm/proto/eth/v1alpha1"
|
|
"github.com/prysmaticlabs/prysm/shared/params"
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
var log = logrus.WithField("prefix", "archiver")
|
|
|
|
// Service defining archiver functionality for persisting checkpointed
|
|
// beacon chain information to a database backend for historical purposes.
|
|
type Service struct {
|
|
ctx context.Context
|
|
cancel context.CancelFunc
|
|
beaconDB db.Database
|
|
headFetcher blockchain.HeadFetcher
|
|
newHeadNotifier blockchain.NewHeadNotifier
|
|
newHeadRootChan chan [32]byte
|
|
}
|
|
|
|
// Config options for the archiver service.
|
|
type Config struct {
|
|
BeaconDB db.Database
|
|
HeadFetcher blockchain.HeadFetcher
|
|
NewHeadNotifier blockchain.NewHeadNotifier
|
|
}
|
|
|
|
// NewArchiverService initializes the service from configuration options.
|
|
func NewArchiverService(ctx context.Context, cfg *Config) *Service {
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
return &Service{
|
|
ctx: ctx,
|
|
cancel: cancel,
|
|
beaconDB: cfg.BeaconDB,
|
|
headFetcher: cfg.HeadFetcher,
|
|
newHeadNotifier: cfg.NewHeadNotifier,
|
|
newHeadRootChan: make(chan [32]byte, 1),
|
|
}
|
|
}
|
|
|
|
// Start the archiver service event loop.
|
|
func (s *Service) Start() {
|
|
go s.run(s.ctx)
|
|
}
|
|
|
|
// Stop the archiver service event loop.
|
|
func (s *Service) Stop() error {
|
|
defer s.cancel()
|
|
return nil
|
|
}
|
|
|
|
// Status reports the healthy status of the archiver. Returning nil means service
|
|
// is correctly running without error.
|
|
func (s *Service) Status() error {
|
|
return nil
|
|
}
|
|
|
|
// We archive committee information pertaining to the head state's epoch.
|
|
func (s *Service) archiveCommitteeInfo(ctx context.Context, headState *pb.BeaconState) error {
|
|
currentEpoch := helpers.SlotToEpoch(headState.Slot)
|
|
proposerSeed, err := helpers.Seed(headState, currentEpoch, params.BeaconConfig().DomainBeaconProposer)
|
|
if err != nil {
|
|
return errors.Wrap(err, "could not generate seed")
|
|
}
|
|
attesterSeed, err := helpers.Seed(headState, currentEpoch, params.BeaconConfig().DomainBeaconAttester)
|
|
if err != nil {
|
|
return errors.Wrap(err, "could not generate seed")
|
|
}
|
|
|
|
info := ðpb.ArchivedCommitteeInfo{
|
|
ProposerSeed: proposerSeed[:],
|
|
AttesterSeed: attesterSeed[:],
|
|
}
|
|
if err := s.beaconDB.SaveArchivedCommitteeInfo(ctx, currentEpoch, info); err != nil {
|
|
return errors.Wrap(err, "could not archive committee info")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// We archive active validator set changes that happened during the previous epoch.
|
|
func (s *Service) archiveActiveSetChanges(ctx context.Context, headState *pb.BeaconState) error {
|
|
activations := validators.ActivatedValidatorIndices(helpers.PrevEpoch(headState), headState.Validators)
|
|
slashings := validators.SlashedValidatorIndices(helpers.PrevEpoch(headState), headState.Validators)
|
|
activeValidatorCount, err := helpers.ActiveValidatorCount(headState, helpers.PrevEpoch(headState))
|
|
if err != nil {
|
|
return errors.Wrap(err, "could not get active validator count")
|
|
}
|
|
exited, err := validators.ExitedValidatorIndices(headState.Validators, activeValidatorCount)
|
|
if err != nil {
|
|
return errors.Wrap(err, "could not determine exited validator indices")
|
|
}
|
|
activeSetChanges := ðpb.ArchivedActiveSetChanges{
|
|
Activated: activations,
|
|
Exited: exited,
|
|
Slashed: slashings,
|
|
}
|
|
if err := s.beaconDB.SaveArchivedActiveValidatorChanges(ctx, helpers.PrevEpoch(headState), activeSetChanges); err != nil {
|
|
return errors.Wrap(err, "could not archive active validator set changes")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// We compute participation metrics by first retrieving the head state and
|
|
// matching validator attestations during the epoch.
|
|
func (s *Service) archiveParticipation(ctx context.Context, headState *pb.BeaconState) error {
|
|
participation, err := epoch.ComputeValidatorParticipation(headState, helpers.SlotToEpoch(headState.Slot))
|
|
if err != nil {
|
|
return errors.Wrap(err, "could not compute participation")
|
|
}
|
|
return s.beaconDB.SaveArchivedValidatorParticipation(ctx, helpers.SlotToEpoch(headState.Slot), participation)
|
|
}
|
|
|
|
// We archive validator balances and active indices.
|
|
func (s *Service) archiveBalances(ctx context.Context, headState *pb.BeaconState) error {
|
|
balances := headState.Balances
|
|
currentEpoch := helpers.CurrentEpoch(headState)
|
|
if err := s.beaconDB.SaveArchivedBalances(ctx, currentEpoch, balances); err != nil {
|
|
return errors.Wrap(err, "could not archive balances")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *Service) run(ctx context.Context) {
|
|
sub := s.newHeadNotifier.HeadUpdatedFeed().Subscribe(s.newHeadRootChan)
|
|
defer sub.Unsubscribe()
|
|
for {
|
|
select {
|
|
case r := <-s.newHeadRootChan:
|
|
log.WithField("headRoot", fmt.Sprintf("%#x", r)).Debug("New chain head event")
|
|
headState := s.headFetcher.HeadState()
|
|
if !helpers.IsEpochEnd(headState.Slot) {
|
|
continue
|
|
}
|
|
if err := s.archiveCommitteeInfo(ctx, headState); err != nil {
|
|
log.WithError(err).Error("Could not archive committee info")
|
|
continue
|
|
}
|
|
if err := s.archiveActiveSetChanges(ctx, headState); err != nil {
|
|
log.WithError(err).Error("Could not archive active validator set changes")
|
|
continue
|
|
}
|
|
if err := s.archiveParticipation(ctx, headState); err != nil {
|
|
log.WithError(err).Error("Could not archive validator participation")
|
|
continue
|
|
}
|
|
if err := s.archiveBalances(ctx, headState); err != nil {
|
|
log.WithError(err).Error("Could not archive validator balances and active indices")
|
|
continue
|
|
}
|
|
log.WithField(
|
|
"epoch",
|
|
helpers.CurrentEpoch(headState),
|
|
).Debug("Successfully archived beacon chain data during epoch")
|
|
case <-s.ctx.Done():
|
|
log.Debug("Context closed, exiting goroutine")
|
|
return
|
|
case err := <-sub.Err():
|
|
log.WithError(err).Error("Subscription to new chain head notifier failed")
|
|
return
|
|
}
|
|
}
|
|
}
|