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Merge pull request #2363 from nspcc-dev/drop-old-nep-transfers

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core: remove stale transfer entries, fix #2096
This commit is contained in:
Roman Khimov 2022-02-16 15:25:10 +03:00 committed by GitHub
commit 0767120e8a
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 144 additions and 40 deletions
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113
pkg/core/blockchain.go
View file

@ -2,6 +2,7 @@ package core
import (
"bytes"
"encoding/binary"
"errors"
"fmt"
"math"
@ -356,9 +357,6 @@ func (bc *Blockchain) init() error {
bc.dao.Version = ver
bc.persistent.Version = ver
// Always try to remove garbage. If there is nothing to do, it will exit quickly.
go bc.removeOldStorageItems()
// At this point there was no version found in the storage which
// implies a creating fresh storage with the version specified
// and the genesis block as first block.
@ -483,27 +481,6 @@ func (bc *Blockchain) init() error {
return bc.updateExtensibleWhitelist(bHeight)
}
func (bc *Blockchain) removeOldStorageItems() {
_, err := bc.dao.Store.Get(storage.SYSCleanStorage.Bytes())
if err != nil {
return
}
b := bc.dao.Store.Batch()
prefix := statesync.TemporaryPrefix(bc.dao.Version.StoragePrefix)
bc.dao.Store.Seek(storage.SeekRange{Prefix: []byte{byte(prefix)}}, func(k, _ []byte) bool {
// #1468, but don't need to copy here, because it is done by Store.
b.Delete(k)
return true
})
b.Delete(storage.SYSCleanStorage.Bytes())
err = bc.dao.Store.PutBatch(b)
if err != nil {
bc.log.Error("failed to remove old storage items", zap.Error(err))
}
}
// jumpToState is an atomic operation that changes Blockchain state to the one
// specified by the state sync point p. All the data needed for the jump must be
// collected by the state sync module.
@ -553,31 +530,43 @@ func (bc *Blockchain) jumpToStateInternal(p uint32, stage stateJumpStage) error
return fmt.Errorf("failed to store state jump stage: %w", err)
}
err = bc.dao.Store.Put(storage.SYSCleanStorage.Bytes(), []byte{})
if err != nil {
return fmt.Errorf("failed to store clean storage flag: %w", err)
}
go bc.removeOldStorageItems()
fallthrough
case newStorageItemsAdded:
b := bc.dao.Store.Batch()
prefix := statesync.TemporaryPrefix(bc.dao.Version.StoragePrefix)
bc.dao.Store.Seek(storage.SeekRange{Prefix: []byte{byte(prefix)}}, func(k, _ []byte) bool {
// #1468, but don't need to copy here, because it is done by Store.
b.Delete(k)
return true
})
err := bc.dao.Store.PutBatch(b)
if err != nil {
return fmt.Errorf("failed to remove old storage items: %w", err)
}
// After current state is updated, we need to remove outdated state-related data if so.
// The only outdated data we might have is genesis-related data, so check it.
if p-bc.config.MaxTraceableBlocks > 0 {
cache := bc.dao.GetWrapped()
cache := bc.dao.GetWrapped().(*dao.Simple)
writeBuf.Reset()
err := cache.DeleteBlock(bc.headerHashes[0], writeBuf)
if err != nil {
return fmt.Errorf("failed to remove outdated state data for the genesis block: %w", err)
}
// TODO: remove NEP-17 transfers and NEP-17 transfer info for genesis block, #2096 related.
prefixes := []byte{byte(storage.STNEP11Transfers), byte(storage.STNEP17Transfers), byte(storage.STTokenTransferInfo)}
for i := range prefixes {
cache.Store.Seek(storage.SeekRange{Prefix: prefixes[i : i+1]}, func(k, v []byte) bool {
_ = cache.Store.Delete(k) // It's MemCachedStore which never returns an error.
return true
})
}
_, err = cache.Persist()
if err != nil {
return fmt.Errorf("failed to drop genesis block state: %w", err)
}
}
err := bc.dao.Store.Put(jumpStageKey, []byte{byte(genesisStateRemoved)})
err = bc.dao.Store.Put(jumpStageKey, []byte{byte(genesisStateRemoved)})
if err != nil {
return fmt.Errorf("failed to store state jump stage: %w", err)
}
@ -704,6 +693,62 @@ func (bc *Blockchain) tryRunGC(old uint32) time.Duration {
tgtBlock /= int64(bc.config.GarbageCollectionPeriod)
tgtBlock *= int64(bc.config.GarbageCollectionPeriod)
dur = bc.stateRoot.GC(uint32(tgtBlock), bc.store)
dur += bc.removeOldTransfers(uint32(tgtBlock))
}
return dur
}
func (bc *Blockchain) removeOldTransfers(index uint32) time.Duration {
bc.log.Info("starting transfer data garbage collection", zap.Uint32("index", index))
start := time.Now()
h, err := bc.GetHeader(bc.GetHeaderHash(int(index)))
if err != nil {
dur := time.Since(start)
bc.log.Error("failed to find block header for transfer GC", zap.Duration("time", dur), zap.Error(err))
return dur
}
var removed, kept int64
var ts = h.Timestamp
prefixes := []byte{byte(storage.STNEP11Transfers), byte(storage.STNEP17Transfers)}
for i := range prefixes {
var acc util.Uint160
var canDrop bool
err = bc.store.SeekGC(storage.SeekRange{
Prefix: prefixes[i : i+1],
Backwards: true, // From new to old.
}, func(k, v []byte) bool {
// We don't look inside of the batches, it requires too much effort, instead
// we drop batches that are confirmed to contain outdated entries.
var batchAcc util.Uint160
var batchTs = binary.BigEndian.Uint64(k[1+util.Uint160Size:])
copy(batchAcc[:], k[1:])
if batchAcc != acc { // Some new account we're iterating over.
acc = batchAcc
} else if canDrop { // We've seen this account and all entries in this batch are guaranteed to be outdated.
removed++
return false
}
// We don't know what's inside, so keep the current
// batch anyway, but allow to drop older ones.
canDrop = batchTs <= ts
kept++
return true
})
if err != nil {
break
}
}
dur := time.Since(start)
if err != nil {
bc.log.Error("failed to flush transfer data GC changeset", zap.Duration("time", dur), zap.Error(err))
} else {
bc.log.Info("finished transfer data garbage collection",
zap.Int64("removed", removed),
zap.Int64("kept", kept),
zap.Duration("time", dur))
}
return dur
}

61
pkg/core/blockchain_test.go
View file

@ -1588,6 +1588,67 @@ func TestDumpAndRestore(t *testing.T) {
})
}
func TestRemoveOldTransfers(t *testing.T) {
// Creating proper number of transfers/blocks takes unneccessary time, so emulate
// some DB with stale entries.
bc := newTestChain(t)
h, err := bc.GetHeader(bc.GetHeaderHash(0))
require.NoError(t, err)
older := h.Timestamp - 1000
newer := h.Timestamp + 1000
acc1 := util.Uint160{1}
acc2 := util.Uint160{2}
acc3 := util.Uint160{3}
ttl := state.TokenTransferLog{Raw: []byte{1}} // It's incorrect, but who cares.
for i := uint32(0); i < 3; i++ {
require.NoError(t, bc.dao.PutTokenTransferLog(acc1, older, i, false, &ttl))
}
for i := uint32(0); i < 3; i++ {
require.NoError(t, bc.dao.PutTokenTransferLog(acc2, newer, i, false, &ttl))
}
for i := uint32(0); i < 2; i++ {
require.NoError(t, bc.dao.PutTokenTransferLog(acc3, older, i, true, &ttl))
}
for i := uint32(0); i < 2; i++ {
require.NoError(t, bc.dao.PutTokenTransferLog(acc3, newer, i, true, &ttl))
}
_, err = bc.dao.Persist()
require.NoError(t, err)
_ = bc.removeOldTransfers(0)
for i := uint32(0); i < 2; i++ {
log, err := bc.dao.GetTokenTransferLog(acc1, older, i, false)
require.NoError(t, err)
require.Equal(t, 0, len(log.Raw))
}
log, err := bc.dao.GetTokenTransferLog(acc1, older, 2, false)
require.NoError(t, err)
require.NotEqual(t, 0, len(log.Raw))
for i := uint32(0); i < 3; i++ {
log, err = bc.dao.GetTokenTransferLog(acc2, newer, i, false)
require.NoError(t, err)
require.NotEqual(t, 0, len(log.Raw))
}
log, err = bc.dao.GetTokenTransferLog(acc3, older, 0, true)
require.NoError(t, err)
require.Equal(t, 0, len(log.Raw))
log, err = bc.dao.GetTokenTransferLog(acc3, older, 1, true)
require.NoError(t, err)
require.NotEqual(t, 0, len(log.Raw))
for i := uint32(0); i < 2; i++ {
log, err = bc.dao.GetTokenTransferLog(acc3, newer, i, true)
require.NoError(t, err)
require.NotEqual(t, 0, len(log.Raw))
}
}
func TestRemoveUntraceable(t *testing.T) {
check := func(t *testing.T, bc *Blockchain, tHash, bHash, sHash util.Uint256, errorExpected bool) {
_, _, err := bc.GetTransaction(tHash)

2
pkg/core/storage/store.go
View file

@ -16,7 +16,6 @@ const (
// DataMPTAux is used to store additional MPT data like height-root
// mappings and local/validated heights.
DataMPTAux KeyPrefix = 0x04
STAccount KeyPrefix = 0x40
STContractID KeyPrefix = 0x51
STStorage KeyPrefix = 0x70
// STTempStorage is used to store contract storage items during state sync process
@ -33,7 +32,6 @@ const (
SYSStateSyncCurrentBlockHeight KeyPrefix = 0xc2
SYSStateSyncPoint KeyPrefix = 0xc3
SYSStateJumpStage KeyPrefix = 0xc4
SYSCleanStorage KeyPrefix = 0xc5
SYSVersion KeyPrefix = 0xf0
)

8
pkg/core/storage/store_test.go
View file

@ -10,7 +10,7 @@ import (
var (
prefixes = []KeyPrefix{
DataExecutable,
STAccount,
DataMPT,
STStorage,
IXHeaderHashList,
SYSCurrentBlock,
@ -20,7 +20,7 @@ var (
expected = []uint8{
0x01,
0x40,
0x03,
0x70,
0x80,
0xc0,
@ -49,12 +49,12 @@ func TestBatchToOperations(t *testing.T) {
b := &MemBatch{
Put: []KeyValueExists{
{KeyValue: KeyValue{Key: []byte{byte(STStorage), 0x01}, Value: []byte{0x01}}},
{KeyValue: KeyValue{Key: []byte{byte(STAccount), 0x02}, Value: []byte{0x02}}},
{KeyValue: KeyValue{Key: []byte{byte(DataMPT), 0x02}, Value: []byte{0x02}}},
{KeyValue: KeyValue{Key: []byte{byte(STStorage), 0x03}, Value: []byte{0x03}}, Exists: true},
},
Deleted: []KeyValueExists{
{KeyValue: KeyValue{Key: []byte{byte(STStorage), 0x04}, Value: []byte{0x04}}},
{KeyValue: KeyValue{Key: []byte{byte(STAccount), 0x05}, Value: []byte{0x05}}},
{KeyValue: KeyValue{Key: []byte{byte(DataMPT), 0x05}, Value: []byte{0x05}}},
{KeyValue: KeyValue{Key: []byte{byte(STStorage), 0x06}, Value: []byte{0x06}}, Exists: true},
},
}