prysm-pulse/validator/db/manage.go

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package db
import (
"context"
"github.com/pkg/errors"
bolt "go.etcd.io/bbolt"
"go.opencensus.io/trace"
)
type epochProposals struct {
Epoch []byte
Proposals []byte
}
type pubKeyProposals struct {
PubKey []byte
Proposals []epochProposals
}
type pubKeyAttestations struct {
PubKey []byte
Attestations []byte
}
// Merge merges data from sourceStores into a new store, which is created in targetDirectory.
func Merge(ctx context.Context, sourceStores []*Store, targetDirectory string) error {
ctx, span := trace.StartSpan(ctx, "Validator.Db.Manage")
defer span.End()
var allProposals []pubKeyProposals
var allAttestations []pubKeyAttestations
for _, store := range sourceStores {
if err := store.db.View(func(tx *bolt.Tx) error {
proposalsBucket := tx.Bucket(historicProposalsBucket)
if err := proposalsBucket.ForEach(func(pubKey, _ []byte) error {
pubKeyProposals, err := getPubKeyProposals(pubKey, proposalsBucket)
if err != nil {
return errors.Wrapf(err, "Could not retrieve proposals for database in %s", store.databasePath)
}
allProposals = append(allProposals, *pubKeyProposals)
return nil
}); err != nil {
return errors.Wrapf(err, "Could not retrieve proposals for database in %s", store.databasePath)
}
attestationsBucket := tx.Bucket(historicAttestationsBucket)
if err := attestationsBucket.ForEach(func(pubKey, v []byte) error {
attestations := pubKeyAttestations{
PubKey: make([]byte, len(pubKey)),
Attestations: make([]byte, len(v)),
}
copy(attestations.PubKey, pubKey)
copy(attestations.Attestations, v)
allAttestations = append(allAttestations, attestations)
return nil
}); err != nil {
return errors.Wrapf(err, "Could not retrieve attestations for database in %s", store.databasePath)
}
return nil
}); err != nil {
return err
}
}
if err := createTargetStore(targetDirectory, allProposals, allAttestations); err != nil {
return errors.Wrapf(err, "Could not create target store")
}
return nil
}
func getPubKeyProposals(pubKey []byte, proposalsBucket *bolt.Bucket) (*pubKeyProposals, error) {
pubKeyProposals := pubKeyProposals{
PubKey: pubKey,
Proposals: []epochProposals{},
}
pubKeyBucket := proposalsBucket.Bucket(pubKey)
if err := pubKeyBucket.ForEach(func(epoch, v []byte) error {
epochProposals := epochProposals{
Epoch: make([]byte, len(epoch)),
Proposals: make([]byte, len(v)),
}
copy(epochProposals.Epoch, epoch)
copy(epochProposals.Proposals, v)
pubKeyProposals.Proposals = append(pubKeyProposals.Proposals, epochProposals)
return nil
}); err != nil {
return nil, err
}
return &pubKeyProposals, nil
}
func createTargetStore(
targetDirectory string,
allProposals []pubKeyProposals,
allAttestations []pubKeyAttestations) error {
newStore, err := NewKVStore(targetDirectory)
defer func() {
if e := newStore.Close(); e != nil {
err = errors.Wrap(err, "Could not close the merged database")
}
}()
if err != nil {
return errors.Wrapf(err, "Could not initialize a new database in %s", targetDirectory)
}
if err := newStore.update(func(tx *bolt.Tx) error {
proposalsBucket := tx.Bucket(historicProposalsBucket)
for _, pubKeyProposals := range allProposals {
pubKeyBucket, err := proposalsBucket.CreateBucket(pubKeyProposals.PubKey)
if err != nil {
return errors.Wrapf(err, "Could not create proposals bucket for public key %v", pubKeyProposals.PubKey)
}
for _, epochProposals := range pubKeyProposals.Proposals {
if err := pubKeyBucket.Put(epochProposals.Epoch, epochProposals.Proposals); err != nil {
return errors.Wrapf(err, "Could not add epoch proposals for epoch %v", epochProposals.Epoch)
}
}
}
attestationsBucket := tx.Bucket(historicAttestationsBucket)
for _, attestations := range allAttestations {
if err := attestationsBucket.Put(attestations.PubKey, attestations.Attestations); err != nil {
return errors.Wrapf(err, "Could not add public key attestations for public key %v", attestations.PubKey)
}
}
return nil
}); err != nil {
return err
}
return nil
}