Ori Newman c59adaa4db
[NOD-1494] Remove transactions from data store delete (#984)
* [NOD-1494] Remove transactions from data store delete

* [NOD-1494] Remove redundant underscores
2020-10-29 18:15:11 +02:00

131 lines
3.9 KiB
Go

package blockheaderstore
import (
"github.com/golang/protobuf/proto"
"github.com/kaspanet/kaspad/domain/consensus/database/serialization"
"github.com/kaspanet/kaspad/domain/consensus/model"
"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
"github.com/kaspanet/kaspad/domain/consensus/utils/dbkeys"
)
var bucket = dbkeys.MakeBucket([]byte("block-headers"))
// blockHeaderStore represents a store of blocks
type blockHeaderStore struct {
staging map[externalapi.DomainHash]*externalapi.DomainBlockHeader
toDelete map[externalapi.DomainHash]struct{}
}
// New instantiates a new BlockHeaderStore
func New() model.BlockHeaderStore {
return &blockHeaderStore{
staging: make(map[externalapi.DomainHash]*externalapi.DomainBlockHeader),
toDelete: make(map[externalapi.DomainHash]struct{}),
}
}
// Stage stages the given block header for the given blockHash
func (bms *blockHeaderStore) Stage(blockHash *externalapi.DomainHash, blockHeader *externalapi.DomainBlockHeader) {
bms.staging[*blockHash] = blockHeader
}
func (bms *blockHeaderStore) IsStaged() bool {
return len(bms.staging) != 0 || len(bms.toDelete) != 0
}
func (bms *blockHeaderStore) Discard() {
bms.staging = make(map[externalapi.DomainHash]*externalapi.DomainBlockHeader)
bms.toDelete = make(map[externalapi.DomainHash]struct{})
}
func (bms *blockHeaderStore) Commit(dbTx model.DBTransaction) error {
for hash, header := range bms.staging {
headerBytes, err := bms.serializeHeader(header)
if err != nil {
return err
}
err = dbTx.Put(bms.hashAsKey(&hash), headerBytes)
if err != nil {
return err
}
}
for hash := range bms.toDelete {
err := dbTx.Delete(bms.hashAsKey(&hash))
if err != nil {
return err
}
}
bms.Discard()
return nil
}
// BlockHeader gets the block header associated with the given blockHash
func (bms *blockHeaderStore) BlockHeader(dbContext model.DBReader, blockHash *externalapi.DomainHash) (*externalapi.DomainBlockHeader, error) {
if header, ok := bms.staging[*blockHash]; ok {
return header, nil
}
headerBytes, err := dbContext.Get(bms.hashAsKey(blockHash))
if err != nil {
return nil, err
}
return bms.deserializeHeader(headerBytes)
}
// HasBlock returns whether a block header with a given hash exists in the store.
func (bms *blockHeaderStore) HasBlockHeader(dbContext model.DBReader, blockHash *externalapi.DomainHash) (bool, error) {
if _, ok := bms.staging[*blockHash]; ok {
return true, nil
}
exists, err := dbContext.Has(bms.hashAsKey(blockHash))
if err != nil {
return false, err
}
return exists, nil
}
// BlockHeaders gets the block headers associated with the given blockHashes
func (bms *blockHeaderStore) BlockHeaders(dbContext model.DBReader, blockHashes []*externalapi.DomainHash) ([]*externalapi.DomainBlockHeader, error) {
headers := make([]*externalapi.DomainBlockHeader, len(blockHashes))
for i, hash := range blockHashes {
var err error
headers[i], err = bms.BlockHeader(dbContext, hash)
if err != nil {
return nil, err
}
}
return headers, nil
}
// Delete deletes the block associated with the given blockHash
func (bms *blockHeaderStore) Delete(blockHash *externalapi.DomainHash) {
if _, ok := bms.staging[*blockHash]; ok {
delete(bms.staging, *blockHash)
return
}
bms.toDelete[*blockHash] = struct{}{}
}
func (bms *blockHeaderStore) hashAsKey(hash *externalapi.DomainHash) model.DBKey {
return bucket.Key(hash[:])
}
func (bms *blockHeaderStore) serializeHeader(header *externalapi.DomainBlockHeader) ([]byte, error) {
dbBlockHeader := serialization.DomainBlockHeaderToDbBlockHeader(header)
return proto.Marshal(dbBlockHeader)
}
func (bms *blockHeaderStore) deserializeHeader(headerBytes []byte) (*externalapi.DomainBlockHeader, error) {
dbBlockHeader := &serialization.DbBlockHeader{}
err := proto.Unmarshal(headerBytes, dbBlockHeader)
if err != nil {
return nil, err
}
return serialization.DbBlockHeaderToDomainBlockHeader(dbBlockHeader)
}