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https://gitlab.com/pulsechaincom/erigon-pulse.git
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f1ee8d507e
* squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * squash * SE * SE * SE * SE * SE * SE * SE * SE * SE * SE * SE * SE * SE * SE * SE
211 lines
4.9 KiB
Go
211 lines
4.9 KiB
Go
package changeset
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"reflect"
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"github.com/ledgerwatch/turbo-geth/common"
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"github.com/ledgerwatch/turbo-geth/common/dbutils"
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"github.com/ledgerwatch/turbo-geth/ethdb"
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)
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type Walker interface {
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Find(blockNumber uint64, k []byte) ([]byte, error)
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}
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func NewChangeSet() *ChangeSet {
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return &ChangeSet{
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Changes: make([]Change, 0),
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}
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}
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type Change struct {
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Key []byte
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Value []byte
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}
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// ChangeSet is a map with keys of the same size.
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// Both keys and values are byte strings.
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type ChangeSet struct {
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// Invariant: all keys are of the same size.
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Changes []Change
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keyLen int
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}
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// BEGIN sort.Interface
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func (s *ChangeSet) Len() int {
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return len(s.Changes)
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}
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func (s *ChangeSet) Swap(i, j int) {
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s.Changes[i], s.Changes[j] = s.Changes[j], s.Changes[i]
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}
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func (s *ChangeSet) Less(i, j int) bool {
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cmp := bytes.Compare(s.Changes[i].Key, s.Changes[j].Key)
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if cmp == 0 {
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cmp = bytes.Compare(s.Changes[i].Value, s.Changes[j].Value)
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}
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return cmp < 0
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}
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// END sort.Interface
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func (s *ChangeSet) KeySize() int {
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if s.keyLen != 0 {
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return s.keyLen
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}
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for _, c := range s.Changes {
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return len(c.Key)
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}
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return 0
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}
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func (s *ChangeSet) checkKeySize(key []byte) error {
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if (s.Len() == 0 && s.KeySize() == 0) || (len(key) == s.KeySize() && len(key) > 0) {
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return nil
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}
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return fmt.Errorf("wrong key size in AccountChangeSet: expected %d, actual %d", s.KeySize(), len(key))
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}
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// Add adds a new entry to the AccountChangeSet.
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// One must not add an existing key
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// and may add keys only of the same size.
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func (s *ChangeSet) Add(key []byte, value []byte) error {
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if err := s.checkKeySize(key); err != nil {
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return err
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}
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s.Changes = append(s.Changes, Change{
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Key: key,
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Value: value,
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})
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return nil
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}
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func (s *ChangeSet) ChangedKeys() map[string]struct{} {
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m := make(map[string]struct{}, len(s.Changes))
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for i := range s.Changes {
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m[string(s.Changes[i].Key)] = struct{}{}
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}
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return m
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}
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func (s *ChangeSet) Equals(s2 *ChangeSet) bool {
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return reflect.DeepEqual(s.Changes, s2.Changes)
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}
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func (s *ChangeSet) String() string {
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str := ""
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for _, v := range s.Changes {
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str += fmt.Sprintf("%v %s : %s\n", len(v.Key), common.Bytes2Hex(v.Key), string(v.Value))
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}
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return str
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}
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// Encoded Method
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func Len(b []byte) int {
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return int(binary.BigEndian.Uint32(b[0:4]))
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}
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func FromDBFormat(addrSize int) func(dbKey, dbValue []byte) (blockN uint64, k, v []byte) {
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stSz := addrSize + common.IncarnationLength + common.HashLength
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const BlockNSize = 8
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return func(dbKey, dbValue []byte) (blockN uint64, k, v []byte) {
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blockN = binary.BigEndian.Uint64(dbKey)
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if len(dbKey) == 8 {
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k = dbValue[:addrSize]
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v = dbValue[addrSize:]
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} else {
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k = make([]byte, stSz)
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dbKey = dbKey[BlockNSize:] // remove BlockN bytes
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copy(k, dbKey)
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copy(k[len(dbKey):], dbValue[:common.HashLength])
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v = dbValue[common.HashLength:]
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if len(v) == 0 {
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v = nil
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}
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}
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return blockN, k, v
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}
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}
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func Walk(db ethdb.Database, bucket string, startkey []byte, fixedbits int, walker func(blockN uint64, k, v []byte) (bool, error)) error {
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fromDBFormat := FromDBFormat(Mapper[bucket].KeySize)
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var blockN uint64
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return db.Walk(bucket, startkey, fixedbits, func(k, v []byte) (bool, error) {
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blockN, k, v = fromDBFormat(k, v)
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return walker(blockN, k, v)
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})
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}
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func Truncate(tx ethdb.Tx, from uint64) error {
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keyStart := dbutils.EncodeBlockNumber(from)
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{
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c := tx.CursorDupSort(dbutils.PlainAccountChangeSetBucket)
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defer c.Close()
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for k, _, err := c.Seek(keyStart); k != nil; k, _, err = c.NextNoDup() {
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if err != nil {
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return err
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}
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err = c.DeleteCurrentDuplicates()
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if err != nil {
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return err
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}
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}
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}
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{
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c := tx.CursorDupSort(dbutils.PlainStorageChangeSetBucket)
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defer c.Close()
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for k, _, err := c.Seek(keyStart); k != nil; k, _, err = c.NextNoDup() {
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if err != nil {
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return err
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}
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err = c.DeleteCurrentDuplicates()
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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var Mapper = map[string]struct {
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IndexBucket string
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WalkerAdapter func(cursor ethdb.CursorDupSort) Walker
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KeySize int
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Template string
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New func() *ChangeSet
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Encode Encoder
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Decode Decoder
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}{
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dbutils.PlainAccountChangeSetBucket: {
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IndexBucket: dbutils.AccountsHistoryBucket,
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WalkerAdapter: func(c ethdb.CursorDupSort) Walker {
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return AccountChangeSetPlain{c: c}
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},
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KeySize: common.AddressLength,
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Template: "acc-ind-",
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New: NewAccountChangeSetPlain,
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Encode: EncodeAccountsPlain,
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Decode: FromDBFormat(common.AddressLength),
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},
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dbutils.PlainStorageChangeSetBucket: {
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IndexBucket: dbutils.StorageHistoryBucket,
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WalkerAdapter: func(c ethdb.CursorDupSort) Walker {
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return StorageChangeSetPlain{c: c}
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},
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KeySize: common.AddressLength,
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Template: "st-ind-",
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New: NewStorageChangeSetPlain,
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Encode: EncodeStoragePlain,
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Decode: FromDBFormat(common.AddressLength),
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},
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}
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