prysm-pulse/validator/db/kv/manage.go
Victor Farazdagi f92244d497
Remove redundant err checking (#7488)
Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
2020-10-09 23:39:23 +00:00

324 lines
9.2 KiB
Go

package kv
import (
"bytes"
"context"
"encoding/hex"
"path/filepath"
"github.com/pkg/errors"
bolt "go.etcd.io/bbolt"
"go.opencensus.io/trace"
)
var errFailedToCloseSource = errors.New("failed to close the source")
var errFailedToCloseManySources = errors.New("failed to close one or more stores")
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()
allProposals, allAttestations, err := getAllProposalsAndAllAttestations(sourceStores)
if err != nil {
return err
}
return createMergeTargetStore(targetDirectory, allProposals, allAttestations)
}
// Split splits data from sourceStore into several stores, one for each public key in sourceStore.
// Each new store is created in its own subdirectory inside targetDirectory.
func Split(ctx context.Context, sourceStore *Store, targetDirectory string) error {
ctx, span := trace.StartSpan(ctx, "Validator.Db.Manage")
defer span.End()
allProposals, allAttestations, err := getAllProposalsAndAllAttestations([]*Store{sourceStore})
if err != nil {
return err
}
return createSplitTargetStores(targetDirectory, allProposals, allAttestations)
}
func getPubKeyProposals(pubKey []byte, proposalsBucket *bolt.Bucket) (*pubKeyProposals, error) {
pubKeyProposals := pubKeyProposals{
PubKey: pubKey,
Proposals: []epochProposals{},
}
pubKeyBucket := proposalsBucket.Bucket(pubKey)
if pubKeyBucket == nil {
return &pubKeyProposals, nil
}
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, errors.Wrapf(err, "could not retrieve proposals for public key %x", pubKey[:12])
}
return &pubKeyProposals, nil
}
func createMergeTargetStore(
targetDirectory string,
allProposals []pubKeyProposals,
allAttestations []pubKeyAttestations) (err error) {
newStore, err := NewKVStore(targetDirectory, [][48]byte{})
defer func() {
if deferErr := newStore.Close(); deferErr != nil {
if err != nil {
err = errors.Wrap(err, errFailedToCloseSource.Error())
} else {
err = errors.Wrap(deferErr, errFailedToCloseSource.Error())
}
}
}()
if err != nil {
return errors.Wrapf(err, "could not initialize a new database in %s", targetDirectory)
}
err = newStore.update(func(tx *bolt.Tx) error {
allProposalsBucket := tx.Bucket(historicProposalsBucket)
for _, pubKeyProposals := range allProposals {
proposalsBucket, err := createProposalsBucket(allProposalsBucket, pubKeyProposals.PubKey)
if err != nil {
return err
}
if err := addEpochProposals(proposalsBucket, pubKeyProposals.Proposals); err != nil {
return err
}
}
attestationsBucket := tx.Bucket(historicAttestationsBucket)
for _, attestations := range allAttestations {
if err := addAttestations(attestationsBucket, attestations); err != nil {
return err
}
}
return nil
})
return err
}
func createSplitTargetStores(
targetDirectory string,
allProposals []pubKeyProposals,
allAttestations []pubKeyAttestations) (err error) {
var storesToClose []*Store
defer func() {
failedToClose := false
for _, store := range storesToClose {
if deferErr := store.Close(); deferErr != nil {
failedToClose = true
}
}
if failedToClose {
if err != nil {
err = errors.Wrapf(err, errFailedToCloseManySources.Error())
} else {
err = errFailedToCloseManySources
}
}
}()
for _, pubKeyProposals := range allProposals {
dirName := hex.EncodeToString(pubKeyProposals.PubKey)[:12]
path := filepath.Join(targetDirectory, dirName)
newStore, err := NewKVStore(path, [][48]byte{})
if err != nil {
return errors.Wrapf(err, "could not create a validator database in %s", path)
}
storesToClose = append(storesToClose, newStore)
if err := newStore.update(func(tx *bolt.Tx) error {
allProposalsBucket := tx.Bucket(historicProposalsBucket)
proposalsBucket, err := createProposalsBucket(allProposalsBucket, pubKeyProposals.PubKey)
if err != nil {
return err
}
if err := addEpochProposals(proposalsBucket, pubKeyProposals.Proposals); err != nil {
return err
}
attestationsBucket := tx.Bucket(historicAttestationsBucket)
for _, pubKeyAttestations := range allAttestations {
if string(pubKeyAttestations.PubKey) == string(pubKeyProposals.PubKey) {
if err := addAttestations(attestationsBucket, pubKeyAttestations); err != nil {
return err
}
break
}
}
return nil
}); err != nil {
return err
}
}
// Create stores for attestations belonging to public keys that do not have proposals.
for _, pubKeyAttestations := range allAttestations {
var hasMatchingProposals = false
for _, pubKeyProposals := range allProposals {
if string(pubKeyAttestations.PubKey) == string(pubKeyProposals.PubKey) {
hasMatchingProposals = true
break
}
}
if !hasMatchingProposals {
dirName := hex.EncodeToString(pubKeyAttestations.PubKey)[:12]
path := filepath.Join(targetDirectory, dirName)
newStore, err := NewKVStore(path, [][48]byte{})
if err != nil {
return errors.Wrapf(err, "could not create a validator database in %s", path)
}
storesToClose = append(storesToClose, newStore)
if err := newStore.update(func(tx *bolt.Tx) error {
attestationsBucket := tx.Bucket(historicAttestationsBucket)
return addAttestations(attestationsBucket, pubKeyAttestations)
}); err != nil {
return err
}
}
}
return nil
}
func getAllProposalsAndAllAttestations(stores []*Store) ([]pubKeyProposals, []pubKeyAttestations, error) {
var allProposals []pubKeyProposals
var allAttestations []pubKeyAttestations
for _, store := range stores {
// Storing keys upfront will allow using several short transactions (one for every key)
// instead of one long-running transaction for all keys.
var allKeys [][]byte
if err := store.db.View(func(tx *bolt.Tx) error {
proposalsBucket := tx.Bucket(historicProposalsBucket)
if err := proposalsBucket.ForEach(func(pubKey, _ []byte) error {
pubKeyCopy := make([]byte, len(pubKey))
copy(pubKeyCopy, pubKey)
allKeys = append(allKeys, pubKeyCopy)
return nil
}); err != nil {
return errors.Wrapf(err, "could not retrieve proposals for source in %s", store.databasePath)
}
attestationsBucket := tx.Bucket(historicAttestationsBucket)
if err := attestationsBucket.ForEach(func(pubKey, _ []byte) error {
pubKeyCopy := make([]byte, len(pubKey))
copy(pubKeyCopy, pubKey)
allKeys = append(allKeys, pubKeyCopy)
return nil
}); err != nil {
return errors.Wrapf(err, "could not retrieve attestations for source in %s", store.databasePath)
}
return nil
}); err != nil {
return nil, nil, err
}
allKeys = removeDuplicateKeys(allKeys)
for _, pubKey := range allKeys {
if err := store.db.View(func(tx *bolt.Tx) error {
proposalsBucket := tx.Bucket(historicProposalsBucket)
pubKeyProposals, err := getPubKeyProposals(pubKey, proposalsBucket)
if err != nil {
return err
}
allProposals = append(allProposals, *pubKeyProposals)
attestationsBucket := tx.Bucket(historicAttestationsBucket)
v := attestationsBucket.Get(pubKey)
if v != nil {
attestations := pubKeyAttestations{
PubKey: pubKey,
Attestations: make([]byte, len(v)),
}
copy(attestations.Attestations, v)
allAttestations = append(allAttestations, attestations)
}
return nil
}); err != nil {
return nil, nil, errors.Wrapf(err, "could not retrieve data for public key %x", pubKey[:12])
}
}
}
return allProposals, allAttestations, nil
}
func createProposalsBucket(topLevelBucket *bolt.Bucket, pubKey []byte) (*bolt.Bucket, error) {
var bucket, err = topLevelBucket.CreateBucket(pubKey)
if err != nil {
return nil, errors.Wrapf(err, "could not create proposals bucket for public key %x", pubKey[:12])
}
return bucket, nil
}
func addEpochProposals(bucket *bolt.Bucket, proposals []epochProposals) error {
for _, singleProposal := range proposals {
if err := bucket.Put(singleProposal.Epoch, singleProposal.Proposals); err != nil {
return errors.Wrapf(err, "could not add epoch proposals for epoch %v", singleProposal.Epoch)
}
}
return nil
}
func addAttestations(bucket *bolt.Bucket, attestations pubKeyAttestations) error {
if err := bucket.Put(attestations.PubKey, attestations.Attestations); err != nil {
return errors.Wrapf(
err,
"could not add public key attestations for public key %x",
attestations.PubKey[:12])
}
return nil
}
func removeDuplicateKeys(keys [][]byte) [][]byte {
last := 0
next:
for _, k1 := range keys {
for _, k2 := range keys[:last] {
if bytes.Equal(k1, k2) {
continue next
}
}
keys[last] = k1
last++
}
return keys[:last]
}