mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-26 05:27:19 +00:00
3db7e85994
* no reason to copy if we work with ethdb.Tx (user of ethdb.Tx expecting that all data valid until end of tx) * less objects
84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
package changeset
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import (
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"bytes"
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"encoding/binary"
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"sort"
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"github.com/ledgerwatch/erigon/common"
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"github.com/ledgerwatch/erigon/common/dbutils"
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"github.com/ledgerwatch/erigon/ethdb"
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)
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type Encoder func(blockN uint64, s *ChangeSet, f func(k, v []byte) error) error
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type Decoder func(dbKey, dbValue []byte) (blockN uint64, k, v []byte)
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func NewAccountChangeSet() *ChangeSet {
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return &ChangeSet{
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Changes: make([]Change, 0),
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keyLen: common.AddressLength,
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}
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}
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func EncodeAccounts(blockN uint64, s *ChangeSet, f func(k, v []byte) error) error {
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sort.Sort(s)
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newK := dbutils.EncodeBlockNumber(blockN)
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for _, cs := range s.Changes {
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newV := make([]byte, len(cs.Key)+len(cs.Value))
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copy(newV, cs.Key)
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copy(newV[len(cs.Key):], cs.Value)
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if err := f(newK, newV); err != nil {
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return err
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}
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}
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return nil
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}
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func DecodeAccounts(dbKey, dbValue []byte) (uint64, []byte, []byte) {
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blockN := binary.BigEndian.Uint64(dbKey)
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k := dbValue[:common.AddressLength]
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v := dbValue[common.AddressLength:]
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return blockN, k, v
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}
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func FindAccount(c ethdb.CursorDupSort, blockNumber uint64, key []byte) ([]byte, error) {
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k := dbutils.EncodeBlockNumber(blockNumber)
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v, err := c.SeekBothRange(k, key)
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if err != nil {
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return nil, err
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}
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_, k, v = DecodeAccounts(k, v)
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if !bytes.HasPrefix(k, key) {
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return nil, nil
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}
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return v, nil
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}
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// GetModifiedAccounts returns a list of addresses that were modified in the block range
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func GetModifiedAccounts(db ethdb.Tx, startNum, endNum uint64) ([]common.Address, error) {
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changedAddrs := make(map[common.Address]struct{})
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if err := Walk(db, dbutils.AccountChangeSetBucket, dbutils.EncodeBlockNumber(startNum), 0, func(blockN uint64, k, v []byte) (bool, error) {
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if blockN > endNum {
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return false, nil
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}
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changedAddrs[common.BytesToAddress(k)] = struct{}{}
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return true, nil
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}); err != nil {
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return nil, err
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}
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if len(changedAddrs) == 0 {
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return nil, nil
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}
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idx := 0
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result := make([]common.Address, len(changedAddrs))
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for addr := range changedAddrs {
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copy(result[idx][:], addr[:])
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idx++
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}
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return result, nil
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}
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