mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-23 12:07:17 +00:00
231e468e19
git-subtree-dir: erigon-lib git-subtree-mainline:3c8cbda809git-subtree-split:93d9c9d9fe
79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
/*
|
|
Copyright 2022 Erigon contributors
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package historyv2
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"fmt"
|
|
"sort"
|
|
|
|
"github.com/ledgerwatch/erigon-lib/common/hexutility"
|
|
"github.com/ledgerwatch/erigon-lib/common/length"
|
|
"github.com/ledgerwatch/erigon-lib/kv"
|
|
)
|
|
|
|
type Encoder func(blockN uint64, s *ChangeSet, f func(k, v []byte) error) error
|
|
type Decoder func(dbKey, dbValue []byte) (blockN uint64, k, v []byte, err error)
|
|
|
|
func NewAccountChangeSet() *ChangeSet {
|
|
return &ChangeSet{
|
|
Changes: make([]Change, 0),
|
|
keyLen: length.Addr,
|
|
}
|
|
}
|
|
|
|
func EncodeAccounts(blockN uint64, s *ChangeSet, f func(k, v []byte) error) error {
|
|
sort.Sort(s)
|
|
newK := hexutility.EncodeTs(blockN)
|
|
for _, cs := range s.Changes {
|
|
newV := make([]byte, len(cs.Key)+len(cs.Value))
|
|
copy(newV, cs.Key)
|
|
copy(newV[len(cs.Key):], cs.Value)
|
|
if err := f(newK, newV); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func DecodeAccounts(dbKey, dbValue []byte) (uint64, []byte, []byte, error) {
|
|
blockN := binary.BigEndian.Uint64(dbKey)
|
|
if len(dbValue) < length.Addr {
|
|
return 0, nil, nil, fmt.Errorf("account changes purged for block %d", blockN)
|
|
}
|
|
k := dbValue[:length.Addr]
|
|
v := dbValue[length.Addr:]
|
|
return blockN, k, v, nil
|
|
}
|
|
|
|
func FindAccount(c kv.CursorDupSort, blockNumber uint64, key []byte) ([]byte, error) {
|
|
k := hexutility.EncodeTs(blockNumber)
|
|
v, err := c.SeekBothRange(k, key)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
_, k, v, err = DecodeAccounts(k, v)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if !bytes.HasPrefix(k, key) {
|
|
return nil, nil
|
|
}
|
|
return v, nil
|
|
}
|