663 lines
21 KiB
Go
663 lines
21 KiB
Go
package dao
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import (
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"bytes"
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"encoding/binary"
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"errors"
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"fmt"
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iocore "io"
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"sort"
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"github.com/nspcc-dev/neo-go/pkg/core/block"
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"github.com/nspcc-dev/neo-go/pkg/core/mpt"
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"github.com/nspcc-dev/neo-go/pkg/core/state"
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"github.com/nspcc-dev/neo-go/pkg/core/storage"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/util/slice"
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)
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// HasTransaction errors.
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var (
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// ErrAlreadyExists is returned when transaction exists in dao.
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ErrAlreadyExists = errors.New("transaction already exists")
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// ErrHasConflicts is returned when transaction is in the list of conflicting
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// transactions which are already in dao.
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ErrHasConflicts = errors.New("transaction has conflicts")
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)
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// DAO is a data access object.
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type DAO interface {
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AppendAppExecResult(aer *state.AppExecResult, buf *io.BufBinWriter) error
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AppendNEP17Transfer(acc util.Uint160, index uint32, isNew bool, tr *state.NEP17Transfer) (bool, error)
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DeleteBlock(h util.Uint256, buf *io.BufBinWriter) error
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DeleteContractID(id int32) error
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DeleteStorageItem(id int32, key []byte) error
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GetAndDecode(entity io.Serializable, key []byte) error
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GetAppExecResults(hash util.Uint256, trig trigger.Type) ([]state.AppExecResult, error)
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GetBatch() *storage.MemBatch
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GetBlock(hash util.Uint256) (*block.Block, error)
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GetContractScriptHash(id int32) (util.Uint160, error)
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GetCurrentBlockHeight() (uint32, error)
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GetCurrentHeaderHeight() (i uint32, h util.Uint256, err error)
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GetHeaderHashes() ([]util.Uint256, error)
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GetNEP17TransferInfo(acc util.Uint160) (*state.NEP17TransferInfo, error)
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GetNEP17TransferLog(acc util.Uint160, index uint32) (*state.NEP17TransferLog, error)
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GetStateSyncPoint() (uint32, error)
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GetStateSyncCurrentBlockHeight() (uint32, error)
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GetStorageItem(id int32, key []byte) state.StorageItem
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GetStorageItems(id int32) (map[string]state.StorageItem, error)
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GetStorageItemsWithPrefix(id int32, prefix []byte) (map[string]state.StorageItem, error)
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GetTransaction(hash util.Uint256) (*transaction.Transaction, uint32, error)
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GetVersion() (string, error)
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GetWrapped() DAO
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HasTransaction(hash util.Uint256) error
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Persist() (int, error)
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PutAppExecResult(aer *state.AppExecResult, buf *io.BufBinWriter) error
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PutContractID(id int32, hash util.Uint160) error
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PutCurrentHeader(hashAndIndex []byte) error
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PutNEP17TransferInfo(acc util.Uint160, bs *state.NEP17TransferInfo) error
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PutNEP17TransferLog(acc util.Uint160, index uint32, lg *state.NEP17TransferLog) error
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PutStateSyncPoint(p uint32) error
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PutStateSyncCurrentBlockHeight(h uint32) error
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PutStorageItem(id int32, key []byte, si state.StorageItem) error
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PutVersion(v string) error
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Seek(id int32, prefix []byte, f func(k, v []byte))
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StoreAsBlock(block *block.Block, buf *io.BufBinWriter) error
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StoreAsCurrentBlock(block *block.Block, buf *io.BufBinWriter) error
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StoreAsTransaction(tx *transaction.Transaction, index uint32, buf *io.BufBinWriter) error
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StoreConflictingTransactions(tx *transaction.Transaction, index uint32, buf *io.BufBinWriter) error
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putNEP17TransferInfo(acc util.Uint160, bs *state.NEP17TransferInfo, buf *io.BufBinWriter) error
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}
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// Simple is memCached wrapper around DB, simple DAO implementation.
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type Simple struct {
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Store *storage.MemCachedStore
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// stateRootInHeader specifies if block header contains state root.
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stateRootInHeader bool
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}
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// NewSimple creates new simple dao using provided backend store.
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func NewSimple(backend storage.Store, stateRootInHeader bool) *Simple {
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st := storage.NewMemCachedStore(backend)
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return &Simple{Store: st, stateRootInHeader: stateRootInHeader}
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}
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// GetBatch returns currently accumulated DB changeset.
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func (dao *Simple) GetBatch() *storage.MemBatch {
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return dao.Store.GetBatch()
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}
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// GetWrapped returns new DAO instance with another layer of wrapped
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// MemCachedStore around the current DAO Store.
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func (dao *Simple) GetWrapped() DAO {
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d := NewSimple(dao.Store, dao.stateRootInHeader)
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return d
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}
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// GetAndDecode performs get operation and decoding with serializable structures.
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func (dao *Simple) GetAndDecode(entity io.Serializable, key []byte) error {
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entityBytes, err := dao.Store.Get(key)
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if err != nil {
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return err
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}
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reader := io.NewBinReaderFromBuf(entityBytes)
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entity.DecodeBinary(reader)
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return reader.Err
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}
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// Put performs put operation with serializable structures.
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func (dao *Simple) Put(entity io.Serializable, key []byte) error {
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return dao.putWithBuffer(entity, key, io.NewBufBinWriter())
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}
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// putWithBuffer performs put operation using buf as a pre-allocated buffer for serialization.
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func (dao *Simple) putWithBuffer(entity io.Serializable, key []byte, buf *io.BufBinWriter) error {
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entity.EncodeBinary(buf.BinWriter)
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if buf.Err != nil {
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return buf.Err
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}
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return dao.Store.Put(key, buf.Bytes())
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}
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func makeContractIDKey(id int32) []byte {
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key := make([]byte, 5)
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key[0] = byte(storage.STContractID)
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binary.LittleEndian.PutUint32(key[1:], uint32(id))
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return key
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}
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// DeleteContractID deletes contract's id to hash mapping.
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func (dao *Simple) DeleteContractID(id int32) error {
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return dao.Store.Delete(makeContractIDKey(id))
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}
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// PutContractID adds a mapping from contract's ID to its hash.
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func (dao *Simple) PutContractID(id int32, hash util.Uint160) error {
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return dao.Store.Put(makeContractIDKey(id), hash.BytesBE())
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}
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// GetContractScriptHash retrieves contract's hash given its ID.
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func (dao *Simple) GetContractScriptHash(id int32) (util.Uint160, error) {
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var data = new(util.Uint160)
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if err := dao.GetAndDecode(data, makeContractIDKey(id)); err != nil {
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return *data, err
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}
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return *data, nil
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}
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// -- start nep17 transfer info.
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// GetNEP17TransferInfo retrieves nep17 transfer info from the cache.
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func (dao *Simple) GetNEP17TransferInfo(acc util.Uint160) (*state.NEP17TransferInfo, error) {
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key := storage.AppendPrefix(storage.STNEP17TransferInfo, acc.BytesBE())
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bs := state.NewNEP17TransferInfo()
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err := dao.GetAndDecode(bs, key)
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if err != nil && err != storage.ErrKeyNotFound {
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return nil, err
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}
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return bs, nil
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}
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// PutNEP17TransferInfo saves nep17 transfer info in the cache.
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func (dao *Simple) PutNEP17TransferInfo(acc util.Uint160, bs *state.NEP17TransferInfo) error {
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return dao.putNEP17TransferInfo(acc, bs, io.NewBufBinWriter())
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}
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func (dao *Simple) putNEP17TransferInfo(acc util.Uint160, bs *state.NEP17TransferInfo, buf *io.BufBinWriter) error {
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key := storage.AppendPrefix(storage.STNEP17TransferInfo, acc.BytesBE())
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return dao.putWithBuffer(bs, key, buf)
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}
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// -- end nep17 transfer info.
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// -- start transfer log.
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func getNEP17TransferLogKey(acc util.Uint160, index uint32) []byte {
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key := make([]byte, 1+util.Uint160Size+4)
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key[0] = byte(storage.STNEP17Transfers)
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copy(key[1:], acc.BytesBE())
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binary.LittleEndian.PutUint32(key[util.Uint160Size:], index)
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return key
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}
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// GetNEP17TransferLog retrieves transfer log from the cache.
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func (dao *Simple) GetNEP17TransferLog(acc util.Uint160, index uint32) (*state.NEP17TransferLog, error) {
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key := getNEP17TransferLogKey(acc, index)
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value, err := dao.Store.Get(key)
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if err != nil {
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if err == storage.ErrKeyNotFound {
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return new(state.NEP17TransferLog), nil
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}
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return nil, err
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}
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return &state.NEP17TransferLog{Raw: value}, nil
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}
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// PutNEP17TransferLog saves given transfer log in the cache.
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func (dao *Simple) PutNEP17TransferLog(acc util.Uint160, index uint32, lg *state.NEP17TransferLog) error {
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key := getNEP17TransferLogKey(acc, index)
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return dao.Store.Put(key, lg.Raw)
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}
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// AppendNEP17Transfer appends a single NEP17 transfer to a log.
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// First return value signalizes that log size has exceeded batch size.
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func (dao *Simple) AppendNEP17Transfer(acc util.Uint160, index uint32, isNew bool, tr *state.NEP17Transfer) (bool, error) {
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var lg *state.NEP17TransferLog
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if isNew {
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lg = new(state.NEP17TransferLog)
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} else {
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var err error
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lg, err = dao.GetNEP17TransferLog(acc, index)
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if err != nil {
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return false, err
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}
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}
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if err := lg.Append(tr); err != nil {
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return false, err
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}
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return lg.Size() >= state.NEP17TransferBatchSize, dao.PutNEP17TransferLog(acc, index, lg)
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}
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// -- end transfer log.
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// -- start notification event.
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// GetAppExecResults gets application execution results with the specified trigger from the
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// given store.
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func (dao *Simple) GetAppExecResults(hash util.Uint256, trig trigger.Type) ([]state.AppExecResult, error) {
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key := storage.AppendPrefix(storage.STNotification, hash.BytesBE())
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aers, err := dao.Store.Get(key)
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if err != nil {
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return nil, err
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}
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r := io.NewBinReaderFromBuf(aers)
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result := make([]state.AppExecResult, 0, 2)
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for {
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aer := new(state.AppExecResult)
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aer.DecodeBinary(r)
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if r.Err != nil {
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if r.Err == iocore.EOF {
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break
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}
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return nil, r.Err
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}
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if aer.Trigger&trig != 0 {
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result = append(result, *aer)
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}
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}
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return result, nil
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}
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// AppendAppExecResult appends given application execution result to the existing
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// set of execution results for the corresponding hash. It can reuse given buffer
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// for the purpose of value serialization.
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func (dao *Simple) AppendAppExecResult(aer *state.AppExecResult, buf *io.BufBinWriter) error {
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key := storage.AppendPrefix(storage.STNotification, aer.Container.BytesBE())
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aers, err := dao.Store.Get(key)
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if err != nil && err != storage.ErrKeyNotFound {
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return err
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}
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if len(aers) == 0 {
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return dao.PutAppExecResult(aer, buf)
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}
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if buf == nil {
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buf = io.NewBufBinWriter()
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}
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aer.EncodeBinary(buf.BinWriter)
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if buf.Err != nil {
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return buf.Err
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}
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aers = append(aers, buf.Bytes()...)
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return dao.Store.Put(key, aers)
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}
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// PutAppExecResult puts given application execution result into the
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// given store. It can reuse given buffer for the purpose of value serialization.
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func (dao *Simple) PutAppExecResult(aer *state.AppExecResult, buf *io.BufBinWriter) error {
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key := storage.AppendPrefix(storage.STNotification, aer.Container.BytesBE())
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if buf == nil {
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return dao.Put(aer, key)
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}
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return dao.putWithBuffer(aer, key, buf)
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}
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// -- end notification event.
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// -- start storage item.
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// GetStorageItem returns StorageItem if it exists in the given store.
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func (dao *Simple) GetStorageItem(id int32, key []byte) state.StorageItem {
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b, err := dao.Store.Get(makeStorageItemKey(id, key))
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if err != nil {
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return nil
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}
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return b
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}
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// PutStorageItem puts given StorageItem for given id with given
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// key into the given store.
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func (dao *Simple) PutStorageItem(id int32, key []byte, si state.StorageItem) error {
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stKey := makeStorageItemKey(id, key)
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return dao.Store.Put(stKey, si)
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}
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// DeleteStorageItem drops storage item for the given id with the
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// given key from the store.
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func (dao *Simple) DeleteStorageItem(id int32, key []byte) error {
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stKey := makeStorageItemKey(id, key)
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return dao.Store.Delete(stKey)
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}
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// GetStorageItems returns all storage items for a given id.
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func (dao *Simple) GetStorageItems(id int32) (map[string]state.StorageItem, error) {
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return dao.GetStorageItemsWithPrefix(id, nil)
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}
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// GetStorageItemsWithPrefix returns all storage items with given id for a
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// given scripthash.
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func (dao *Simple) GetStorageItemsWithPrefix(id int32, prefix []byte) (map[string]state.StorageItem, error) {
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var siMap = make(map[string]state.StorageItem)
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saveToMap := func(k, v []byte) {
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// Cut prefix and hash.
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// Must copy here, #1468.
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key := slice.Copy(k)
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val := slice.Copy(v)
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siMap[string(key)] = state.StorageItem(val)
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}
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dao.Seek(id, prefix, saveToMap)
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return siMap, nil
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}
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// Seek executes f for all items with a given prefix.
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// If key is to be used outside of f, they must be copied.
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func (dao *Simple) Seek(id int32, prefix []byte, f func(k, v []byte)) {
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lookupKey := makeStorageItemKey(id, nil)
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if prefix != nil {
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lookupKey = append(lookupKey, prefix...)
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}
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dao.Store.Seek(lookupKey, func(k, v []byte) {
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f(k[len(lookupKey):], v)
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})
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}
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// makeStorageItemKey returns a key used to store StorageItem in the DB.
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func makeStorageItemKey(id int32, key []byte) []byte {
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// 1 for prefix + 4 for Uint32 + len(key) for key
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buf := make([]byte, 5+len(key))
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buf[0] = byte(storage.STStorage)
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binary.LittleEndian.PutUint32(buf[1:], uint32(id))
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copy(buf[5:], key)
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return buf
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}
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// -- end storage item.
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// -- other.
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// GetBlock returns Block by the given hash if it exists in the store.
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func (dao *Simple) GetBlock(hash util.Uint256) (*block.Block, error) {
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key := storage.AppendPrefix(storage.DataBlock, hash.BytesBE())
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b, err := dao.Store.Get(key)
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if err != nil {
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return nil, err
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}
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block, err := block.NewBlockFromTrimmedBytes(dao.stateRootInHeader, b)
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if err != nil {
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return nil, err
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}
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return block, nil
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}
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// GetVersion attempts to get the current version stored in the
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// underlying store.
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func (dao *Simple) GetVersion() (string, error) {
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version, err := dao.Store.Get(storage.SYSVersion.Bytes())
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return string(version), err
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}
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// GetCurrentBlockHeight returns the current block height found in the
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// underlying store.
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func (dao *Simple) GetCurrentBlockHeight() (uint32, error) {
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b, err := dao.Store.Get(storage.SYSCurrentBlock.Bytes())
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if err != nil {
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return 0, err
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}
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return binary.LittleEndian.Uint32(b[32:36]), nil
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}
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// GetCurrentHeaderHeight returns the current header height and hash from
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// the underlying store.
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func (dao *Simple) GetCurrentHeaderHeight() (i uint32, h util.Uint256, err error) {
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var b []byte
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b, err = dao.Store.Get(storage.SYSCurrentHeader.Bytes())
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if err != nil {
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return
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}
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i = binary.LittleEndian.Uint32(b[32:36])
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h, err = util.Uint256DecodeBytesLE(b[:32])
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return
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}
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// GetStateSyncPoint returns current state synchronisation point P.
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func (dao *Simple) GetStateSyncPoint() (uint32, error) {
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b, err := dao.Store.Get(storage.SYSStateSyncPoint.Bytes())
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if err != nil {
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return 0, err
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}
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return binary.LittleEndian.Uint32(b), nil
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}
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// GetStateSyncCurrentBlockHeight returns current block height stored during state
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// synchronisation process.
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func (dao *Simple) GetStateSyncCurrentBlockHeight() (uint32, error) {
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b, err := dao.Store.Get(storage.SYSStateSyncCurrentBlockHeight.Bytes())
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if err != nil {
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return 0, err
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}
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return binary.LittleEndian.Uint32(b), nil
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}
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// GetHeaderHashes returns a sorted list of header hashes retrieved from
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// the given underlying store.
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func (dao *Simple) GetHeaderHashes() ([]util.Uint256, error) {
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hashMap := make(map[uint32][]util.Uint256)
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dao.Store.Seek(storage.IXHeaderHashList.Bytes(), func(k, v []byte) {
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storedCount := binary.LittleEndian.Uint32(k[1:])
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hashes, err := read2000Uint256Hashes(v)
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if err != nil {
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panic(err)
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}
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hashMap[storedCount] = hashes
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})
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var (
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hashes = make([]util.Uint256, 0, len(hashMap))
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sortedKeys = make([]uint32, 0, len(hashMap))
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)
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for k := range hashMap {
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sortedKeys = append(sortedKeys, k)
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}
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sort.Slice(sortedKeys, func(i, j int) bool { return sortedKeys[i] < sortedKeys[j] })
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for _, key := range sortedKeys {
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hashes = append(hashes[:key], hashMap[key]...)
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}
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return hashes, nil
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}
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// GetTransaction returns Transaction and its height by the given hash
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// if it exists in the store. It does not return dummy transactions.
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func (dao *Simple) GetTransaction(hash util.Uint256) (*transaction.Transaction, uint32, error) {
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key := storage.AppendPrefix(storage.DataTransaction, hash.BytesBE())
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b, err := dao.Store.Get(key)
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if err != nil {
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return nil, 0, err
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}
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if len(b) < 5 {
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return nil, 0, errors.New("bad transaction bytes")
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}
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if b[4] == transaction.DummyVersion {
|
|
return nil, 0, storage.ErrKeyNotFound
|
|
}
|
|
r := io.NewBinReaderFromBuf(b)
|
|
|
|
var height = r.ReadU32LE()
|
|
|
|
tx := &transaction.Transaction{}
|
|
tx.DecodeBinary(r)
|
|
if r.Err != nil {
|
|
return nil, 0, r.Err
|
|
}
|
|
|
|
return tx, height, nil
|
|
}
|
|
|
|
// PutVersion stores the given version in the underlying store.
|
|
func (dao *Simple) PutVersion(v string) error {
|
|
return dao.Store.Put(storage.SYSVersion.Bytes(), []byte(v))
|
|
}
|
|
|
|
// PutCurrentHeader stores current header.
|
|
func (dao *Simple) PutCurrentHeader(hashAndIndex []byte) error {
|
|
return dao.Store.Put(storage.SYSCurrentHeader.Bytes(), hashAndIndex)
|
|
}
|
|
|
|
// PutStateSyncPoint stores current state synchronisation point P.
|
|
func (dao *Simple) PutStateSyncPoint(p uint32) error {
|
|
buf := make([]byte, 4)
|
|
binary.LittleEndian.PutUint32(buf, p)
|
|
return dao.Store.Put(storage.SYSStateSyncPoint.Bytes(), buf)
|
|
}
|
|
|
|
// PutStateSyncCurrentBlockHeight stores current block height during state synchronisation process.
|
|
func (dao *Simple) PutStateSyncCurrentBlockHeight(h uint32) error {
|
|
buf := make([]byte, 4)
|
|
binary.LittleEndian.PutUint32(buf, h)
|
|
return dao.Store.Put(storage.SYSStateSyncCurrentBlockHeight.Bytes(), buf)
|
|
}
|
|
|
|
// read2000Uint256Hashes attempts to read 2000 Uint256 hashes from
|
|
// the given byte array.
|
|
func read2000Uint256Hashes(b []byte) ([]util.Uint256, error) {
|
|
r := bytes.NewReader(b)
|
|
br := io.NewBinReaderFromIO(r)
|
|
hashes := make([]util.Uint256, 0)
|
|
br.ReadArray(&hashes)
|
|
if br.Err != nil {
|
|
return nil, br.Err
|
|
}
|
|
return hashes, nil
|
|
}
|
|
|
|
// HasTransaction returns nil if the given store does not contain the given
|
|
// Transaction hash. It returns an error in case if transaction is in chain
|
|
// or in the list of conflicting transactions.
|
|
func (dao *Simple) HasTransaction(hash util.Uint256) error {
|
|
key := storage.AppendPrefix(storage.DataTransaction, hash.BytesBE())
|
|
bytes, err := dao.Store.Get(key)
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
|
|
if len(bytes) < 5 {
|
|
return nil
|
|
}
|
|
if bytes[4] == transaction.DummyVersion {
|
|
return ErrHasConflicts
|
|
}
|
|
return ErrAlreadyExists
|
|
}
|
|
|
|
// StoreAsBlock stores given block as DataBlock. It can reuse given buffer for
|
|
// the purpose of value serialization.
|
|
func (dao *Simple) StoreAsBlock(block *block.Block, buf *io.BufBinWriter) error {
|
|
var (
|
|
key = storage.AppendPrefix(storage.DataBlock, block.Hash().BytesBE())
|
|
)
|
|
if buf == nil {
|
|
buf = io.NewBufBinWriter()
|
|
}
|
|
b, err := block.Trim()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
buf.WriteBytes(b)
|
|
if buf.Err != nil {
|
|
return buf.Err
|
|
}
|
|
return dao.Store.Put(key, buf.Bytes())
|
|
}
|
|
|
|
// DeleteBlock removes block from dao.
|
|
func (dao *Simple) DeleteBlock(h util.Uint256, w *io.BufBinWriter) error {
|
|
batch := dao.Store.Batch()
|
|
key := make([]byte, util.Uint256Size+1)
|
|
key[0] = byte(storage.DataBlock)
|
|
copy(key[1:], h.BytesBE())
|
|
bs, err := dao.Store.Get(key)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
b, err := block.NewBlockFromTrimmedBytes(dao.stateRootInHeader, bs)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if w == nil {
|
|
w = io.NewBufBinWriter()
|
|
}
|
|
b.Header.EncodeBinary(w.BinWriter)
|
|
w.BinWriter.WriteB(0)
|
|
if w.Err != nil {
|
|
return w.Err
|
|
}
|
|
batch.Put(key, w.Bytes())
|
|
|
|
key[0] = byte(storage.DataTransaction)
|
|
for _, tx := range b.Transactions {
|
|
copy(key[1:], tx.Hash().BytesBE())
|
|
batch.Delete(key)
|
|
key[0] = byte(storage.STNotification)
|
|
batch.Delete(key)
|
|
}
|
|
|
|
key[0] = byte(storage.STNotification)
|
|
copy(key[1:], h.BytesBE())
|
|
batch.Delete(key)
|
|
|
|
return dao.Store.PutBatch(batch)
|
|
}
|
|
|
|
// StoreAsCurrentBlock stores a hash of the given block with prefix
|
|
// SYSCurrentBlock. It can reuse given buffer for the purpose of value
|
|
// serialization.
|
|
func (dao *Simple) StoreAsCurrentBlock(block *block.Block, buf *io.BufBinWriter) error {
|
|
if buf == nil {
|
|
buf = io.NewBufBinWriter()
|
|
}
|
|
h := block.Hash()
|
|
h.EncodeBinary(buf.BinWriter)
|
|
buf.WriteU32LE(block.Index)
|
|
return dao.Store.Put(storage.SYSCurrentBlock.Bytes(), buf.Bytes())
|
|
}
|
|
|
|
// StoreAsTransaction stores given TX as DataTransaction. It can reuse given
|
|
// buffer for the purpose of value serialization.
|
|
func (dao *Simple) StoreAsTransaction(tx *transaction.Transaction, index uint32, buf *io.BufBinWriter) error {
|
|
key := storage.AppendPrefix(storage.DataTransaction, tx.Hash().BytesBE())
|
|
if buf == nil {
|
|
buf = io.NewBufBinWriter()
|
|
}
|
|
buf.WriteU32LE(index)
|
|
if tx.Version == transaction.DummyVersion {
|
|
buf.BinWriter.WriteB(tx.Version)
|
|
} else {
|
|
tx.EncodeBinary(buf.BinWriter)
|
|
}
|
|
if buf.Err != nil {
|
|
return buf.Err
|
|
}
|
|
return dao.Store.Put(key, buf.Bytes())
|
|
}
|
|
|
|
// StoreConflictingTransactions stores transactions given tx has conflicts with
|
|
// as DataTransaction with dummy version. It can reuse given buffer for the
|
|
// purpose of value serialization.
|
|
func (dao *Simple) StoreConflictingTransactions(tx *transaction.Transaction, index uint32, buf *io.BufBinWriter) error {
|
|
if buf == nil {
|
|
buf = io.NewBufBinWriter()
|
|
}
|
|
for _, attr := range tx.GetAttributes(transaction.ConflictsT) {
|
|
hash := attr.Value.(*transaction.Conflicts).Hash
|
|
dummyTx := transaction.NewTrimmedTX(hash)
|
|
dummyTx.Version = transaction.DummyVersion
|
|
if err := dao.StoreAsTransaction(dummyTx, index, buf); err != nil {
|
|
return fmt.Errorf("failed to store conflicting transaction %s for transaction %s: %w", hash.StringLE(), tx.Hash().StringLE(), err)
|
|
}
|
|
buf.Reset()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Persist flushes all the changes made into the (supposedly) persistent
|
|
// underlying store.
|
|
func (dao *Simple) Persist() (int, error) {
|
|
return dao.Store.Persist()
|
|
}
|
|
|
|
// GetMPTBatch storage changes to be applied to MPT.
|
|
func (dao *Simple) GetMPTBatch() mpt.Batch {
|
|
var b mpt.Batch
|
|
dao.Store.MemoryStore.SeekAll([]byte{byte(storage.STStorage)}, func(k, v []byte) {
|
|
b.Add(k[1:], v)
|
|
})
|
|
return b
|
|
}
|