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Patch for concurrent iterator & others (onto v1.11.6) #386

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roysc wants to merge 1565 commits from v1.11.6-statediff-v5 into master
pull from: v1.11.6-statediff-v5
merge into: cerc-io:master
Conversation 0 Commits 1565 Files Changed 1471 +866 -287
41 changed files with 866 additions and 287 deletions
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Showing only changes of commit bff84a99fe - Show all commits

33
cmd/geth/dbcmd.go
View File

@ -150,7 +150,7 @@ WARNING: This is a low-level operation which may cause database corruption!`,
Action: dbDumpTrie,
Name: "dumptrie",
Usage: "Show the storage key/values of a given storage trie",
ArgsUsage: "<hex-encoded storage trie root> <hex-encoded start (optional)> <int max elements (optional)>",
ArgsUsage: "<hex-encoded state root> <hex-encoded account hash> <hex-encoded storage trie root> <hex-encoded start (optional)> <int max elements (optional)>",
Flags: flags.Merge([]cli.Flag{
utils.SyncModeFlag,
}, utils.NetworkFlags, utils.DatabasePathFlags),
@ -486,7 +486,7 @@ func dbPut(ctx *cli.Context) error {
// dbDumpTrie shows the key-value slots of a given storage trie
func dbDumpTrie(ctx *cli.Context) error {
if ctx.NArg() < 1 {
if ctx.NArg() < 3 {
return fmt.Errorf("required arguments: %v", ctx.Command.ArgsUsage)
}
stack, _ := makeConfigNode(ctx)
@ -494,30 +494,41 @@ func dbDumpTrie(ctx *cli.Context) error {
db := utils.MakeChainDatabase(ctx, stack, true)
defer db.Close()
var (
root []byte
state []byte
storage []byte
account []byte
start []byte
max = int64(-1)
err error
)
if root, err = hexutil.Decode(ctx.Args().Get(0)); err != nil {
log.Info("Could not decode the root", "error", err)
if state, err = hexutil.Decode(ctx.Args().Get(0)); err != nil {
log.Info("Could not decode the state root", "error", err)
return err
}
stRoot := common.BytesToHash(root)
if ctx.NArg() >= 2 {
if start, err = hexutil.Decode(ctx.Args().Get(1)); err != nil {
if account, err = hexutil.Decode(ctx.Args().Get(1)); err != nil {
log.Info("Could not decode the account hash", "error", err)
return err
}
if storage, err = hexutil.Decode(ctx.Args().Get(2)); err != nil {
log.Info("Could not decode the storage trie root", "error", err)
return err
}
if ctx.NArg() > 3 {
if start, err = hexutil.Decode(ctx.Args().Get(3)); err != nil {
log.Info("Could not decode the seek position", "error", err)
return err
}
}
if ctx.NArg() >= 3 {
if max, err = strconv.ParseInt(ctx.Args().Get(2), 10, 64); err != nil {
if ctx.NArg() > 4 {
if max, err = strconv.ParseInt(ctx.Args().Get(4), 10, 64); err != nil {
log.Info("Could not decode the max count", "error", err)
return err
}
}
theTrie, err := trie.New(common.Hash{}, stRoot, trie.NewDatabase(db))
id := trie.StorageTrieID(common.BytesToHash(state), common.BytesToHash(account), common.BytesToHash(storage))
theTrie, err := trie.New(id, trie.NewDatabase(db))
if err != nil {
return err
}

10
cmd/geth/snapshot.go
View File

@ -286,7 +286,7 @@ func traverseState(ctx *cli.Context) error {
log.Info("Start traversing the state", "root", root, "number", headBlock.NumberU64())
}
triedb := trie.NewDatabase(chaindb)
t, err := trie.NewStateTrie(common.Hash{}, root, triedb)
t, err := trie.NewStateTrie(trie.StateTrieID(root), triedb)
if err != nil {
log.Error("Failed to open trie", "root", root, "err", err)
return err
@ -307,7 +307,8 @@ func traverseState(ctx *cli.Context) error {
return err
}
if acc.Root != emptyRoot {
storageTrie, err := trie.NewStateTrie(common.BytesToHash(accIter.Key), acc.Root, triedb)
id := trie.StorageTrieID(root, common.BytesToHash(accIter.Key), acc.Root)
storageTrie, err := trie.NewStateTrie(id, triedb)
if err != nil {
log.Error("Failed to open storage trie", "root", acc.Root, "err", err)
return err
@ -375,7 +376,7 @@ func traverseRawState(ctx *cli.Context) error {
log.Info("Start traversing the state", "root", root, "number", headBlock.NumberU64())
}
triedb := trie.NewDatabase(chaindb)
t, err := trie.NewStateTrie(common.Hash{}, root, triedb)
t, err := trie.NewStateTrie(trie.StateTrieID(root), triedb)
if err != nil {
log.Error("Failed to open trie", "root", root, "err", err)
return err
@ -421,7 +422,8 @@ func traverseRawState(ctx *cli.Context) error {
return errors.New("invalid account")
}
if acc.Root != emptyRoot {
storageTrie, err := trie.NewStateTrie(common.BytesToHash(accIter.LeafKey()), acc.Root, triedb)
id := trie.StorageTrieID(root, common.BytesToHash(accIter.LeafKey()), acc.Root)
storageTrie, err := trie.NewStateTrie(id, triedb)
if err != nil {
log.Error("Failed to open storage trie", "root", acc.Root, "err", err)
return errors.New("missing storage trie")

13
core/blockchain.go
View File

@ -70,6 +70,8 @@ var (
snapshotStorageReadTimer = metrics.NewRegisteredTimer("chain/snapshot/storage/reads", nil)
snapshotCommitTimer = metrics.NewRegisteredTimer("chain/snapshot/commits", nil)
triedbCommitTimer = metrics.NewRegisteredTimer("chain/triedb/commits", nil)
blockInsertTimer = metrics.NewRegisteredTimer("chain/inserts", nil)
blockValidationTimer = metrics.NewRegisteredTimer("chain/validation", nil)
blockExecutionTimer = metrics.NewRegisteredTimer("chain/execution", nil)
@ -737,10 +739,10 @@ func (bc *BlockChain) SnapSyncCommitHead(hash common.Hash) error {
if block == nil {
return fmt.Errorf("non existent block [%x..]", hash[:4])
}
if _, err := trie.NewStateTrie(common.Hash{}, block.Root(), bc.stateCache.TrieDB()); err != nil {
return err
root := block.Root()
if !bc.HasState(root) {
return fmt.Errorf("non existent state [%x..]", root[:4])
}
// If all checks out, manually set the head block.
if !bc.chainmu.TryLock() {
return errChainStopped
@ -752,7 +754,7 @@ func (bc *BlockChain) SnapSyncCommitHead(hash common.Hash) error {
// Destroy any existing state snapshot and regenerate it in the background,
// also resuming the normal maintenance of any previously paused snapshot.
if bc.snaps != nil {
bc.snaps.Rebuild(block.Root())
bc.snaps.Rebuild(root)
}
log.Info("Committed new head block", "number", block.Number(), "hash", hash)
return nil
@ -1750,8 +1752,9 @@ func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals, setHead bool)
accountCommitTimer.Update(statedb.AccountCommits) // Account commits are complete, we can mark them
storageCommitTimer.Update(statedb.StorageCommits) // Storage commits are complete, we can mark them
snapshotCommitTimer.Update(statedb.SnapshotCommits) // Snapshot commits are complete, we can mark them
triedbCommitTimer.Update(statedb.TrieDBCommits) // Triedb commits are complete, we can mark them
blockWriteTimer.Update(time.Since(substart) - statedb.AccountCommits - statedb.StorageCommits - statedb.SnapshotCommits)
blockWriteTimer.Update(time.Since(substart) - statedb.AccountCommits - statedb.StorageCommits - statedb.SnapshotCommits - statedb.TrieDBCommits)
blockInsertTimer.UpdateSince(start)
// Report the import stats before returning the various results

8
core/state/database.go
View File

@ -43,7 +43,7 @@ type Database interface {
OpenTrie(root common.Hash) (Trie, error)
// OpenStorageTrie opens the storage trie of an account.
OpenStorageTrie(addrHash, root common.Hash) (Trie, error)
OpenStorageTrie(stateRoot common.Hash, addrHash, root common.Hash) (Trie, error)
// CopyTrie returns an independent copy of the given trie.
CopyTrie(Trie) Trie
@ -148,7 +148,7 @@ type cachingDB struct {
// OpenTrie opens the main account trie at a specific root hash.
func (db *cachingDB) OpenTrie(root common.Hash) (Trie, error) {
tr, err := trie.NewStateTrie(common.Hash{}, root, db.db)
tr, err := trie.NewStateTrie(trie.StateTrieID(root), db.db)
if err != nil {
return nil, err
}
@ -156,8 +156,8 @@ func (db *cachingDB) OpenTrie(root common.Hash) (Trie, error) {
}
// OpenStorageTrie opens the storage trie of an account.
func (db *cachingDB) OpenStorageTrie(addrHash, root common.Hash) (Trie, error) {
tr, err := trie.NewStateTrie(addrHash, root, db.db)
func (db *cachingDB) OpenStorageTrie(stateRoot common.Hash, addrHash, root common.Hash) (Trie, error) {
tr, err := trie.NewStateTrie(trie.StorageTrieID(stateRoot, addrHash, root), db.db)
if err != nil {
return nil, err
}

2
core/state/iterator.go
View File

@ -109,7 +109,7 @@ func (it *NodeIterator) step() error {
if err := rlp.Decode(bytes.NewReader(it.stateIt.LeafBlob()), &account); err != nil {
return err
}
dataTrie, err := it.state.db.OpenStorageTrie(common.BytesToHash(it.stateIt.LeafKey()), account.Root)
dataTrie, err := it.state.db.OpenStorageTrie(it.state.originalRoot, common.BytesToHash(it.stateIt.LeafKey()), account.Root)
if err != nil {
return err
}

6
core/state/metrics.go
View File

@ -23,6 +23,8 @@ var (
storageUpdatedMeter = metrics.NewRegisteredMeter("state/update/storage", nil)
accountDeletedMeter = metrics.NewRegisteredMeter("state/delete/account", nil)
storageDeletedMeter = metrics.NewRegisteredMeter("state/delete/storage", nil)
accountTrieCommittedMeter = metrics.NewRegisteredMeter("state/commit/accountnodes", nil)
storageTriesCommittedMeter = metrics.NewRegisteredMeter("state/commit/storagenodes", nil)
accountTrieUpdatedMeter = metrics.NewRegisteredMeter("state/update/accountnodes", nil)
storageTriesUpdatedMeter = metrics.NewRegisteredMeter("state/update/storagenodes", nil)
accountTrieDeletedMeter = metrics.NewRegisteredMeter("state/delete/accountnodes", nil)
storageTriesDeletedMeter = metrics.NewRegisteredMeter("state/delete/storagenodes", nil)
)

7
core/state/pruner/pruner.go
View File

@ -93,7 +93,7 @@ type Pruner struct {
func NewPruner(db ethdb.Database, config Config) (*Pruner, error) {
headBlock := rawdb.ReadHeadBlock(db)
if headBlock == nil {
return nil, errors.New("Failed to load head block")
return nil, errors.New("failed to load head block")
}
snapconfig := snapshot.Config{
CacheSize: 256,
@ -427,7 +427,7 @@ func extractGenesis(db ethdb.Database, stateBloom *stateBloom) error {
if genesis == nil {
return errors.New("missing genesis block")
}
t, err := trie.NewStateTrie(common.Hash{}, genesis.Root(), trie.NewDatabase(db))
t, err := trie.NewStateTrie(trie.StateTrieID(genesis.Root()), trie.NewDatabase(db))
if err != nil {
return err
}
@ -447,7 +447,8 @@ func extractGenesis(db ethdb.Database, stateBloom *stateBloom) error {
return err
}
if acc.Root != emptyRoot {
storageTrie, err := trie.NewStateTrie(common.BytesToHash(accIter.LeafKey()), acc.Root, trie.NewDatabase(db))
id := trie.StorageTrieID(genesis.Root(), common.BytesToHash(accIter.LeafKey()), acc.Root)
storageTrie, err := trie.NewStateTrie(id, trie.NewDatabase(db))
if err != nil {
return err
}

27
core/state/snapshot/generate.go
View File

@ -166,7 +166,7 @@ func (result *proofResult) forEach(callback func(key []byte, val []byte) error)
//
// The proof result will be returned if the range proving is finished, otherwise
// the error will be returned to abort the entire procedure.
func (dl *diskLayer) proveRange(ctx *generatorContext, owner common.Hash, root common.Hash, prefix []byte, kind string, origin []byte, max int, valueConvertFn func([]byte) ([]byte, error)) (*proofResult, error) {
func (dl *diskLayer) proveRange(ctx *generatorContext, trieId *trie.ID, prefix []byte, kind string, origin []byte, max int, valueConvertFn func([]byte) ([]byte, error)) (*proofResult, error) {
var (
keys [][]byte
vals [][]byte
@ -233,8 +233,9 @@ func (dl *diskLayer) proveRange(ctx *generatorContext, owner common.Hash, root c
}(time.Now())
// The snap state is exhausted, pass the entire key/val set for verification
root := trieId.Root
if origin == nil && !diskMore {
stackTr := trie.NewStackTrieWithOwner(nil, owner)
stackTr := trie.NewStackTrie(nil)
for i, key := range keys {
stackTr.TryUpdate(key, vals[i])
}
@ -248,7 +249,7 @@ func (dl *diskLayer) proveRange(ctx *generatorContext, owner common.Hash, root c
return &proofResult{keys: keys, vals: vals}, nil
}
// Snap state is chunked, generate edge proofs for verification.
tr, err := trie.New(owner, root, dl.triedb)
tr, err := trie.New(trieId, dl.triedb)
if err != nil {
ctx.stats.Log("Trie missing, state snapshotting paused", dl.root, dl.genMarker)
return nil, errMissingTrie
@ -313,9 +314,9 @@ type onStateCallback func(key []byte, val []byte, write bool, delete bool) error
// generateRange generates the state segment with particular prefix. Generation can
// either verify the correctness of existing state through range-proof and skip
// generation, or iterate trie to regenerate state on demand.
func (dl *diskLayer) generateRange(ctx *generatorContext, owner common.Hash, root common.Hash, prefix []byte, kind string, origin []byte, max int, onState onStateCallback, valueConvertFn func([]byte) ([]byte, error)) (bool, []byte, error) {
func (dl *diskLayer) generateRange(ctx *generatorContext, trieId *trie.ID, prefix []byte, kind string, origin []byte, max int, onState onStateCallback, valueConvertFn func([]byte) ([]byte, error)) (bool, []byte, error) {
// Use range prover to check the validity of the flat state in the range
result, err := dl.proveRange(ctx, owner, root, prefix, kind, origin, max, valueConvertFn)
result, err := dl.proveRange(ctx, trieId, prefix, kind, origin, max, valueConvertFn)
if err != nil {
return false, nil, err
}
@ -363,7 +364,7 @@ func (dl *diskLayer) generateRange(ctx *generatorContext, owner common.Hash, roo
if len(result.keys) > 0 {
snapNodeCache = memorydb.New()
snapTrieDb := trie.NewDatabase(snapNodeCache)
snapTrie, _ := trie.New(owner, common.Hash{}, snapTrieDb)
snapTrie := trie.NewEmpty(snapTrieDb)
for i, key := range result.keys {
snapTrie.Update(key, result.vals[i])
}
@ -377,7 +378,7 @@ func (dl *diskLayer) generateRange(ctx *generatorContext, owner common.Hash, roo
// if it's already opened with some nodes resolved.
tr := result.tr
if tr == nil {
tr, err = trie.New(owner, root, dl.triedb)
tr, err = trie.New(trieId, dl.triedb)
if err != nil {
ctx.stats.Log("Trie missing, state snapshotting paused", dl.root, dl.genMarker)
return false, nil, errMissingTrie
@ -460,7 +461,7 @@ func (dl *diskLayer) generateRange(ctx *generatorContext, owner common.Hash, roo
} else {
snapAccountTrieReadCounter.Inc((time.Since(start) - internal).Nanoseconds())
}
logger.Debug("Regenerated state range", "root", root, "last", hexutil.Encode(last),
logger.Debug("Regenerated state range", "root", trieId.Root, "last", hexutil.Encode(last),
"count", count, "created", created, "updated", updated, "untouched", untouched, "deleted", deleted)
// If there are either more trie items, or there are more snap items
@ -511,7 +512,7 @@ func (dl *diskLayer) checkAndFlush(ctx *generatorContext, current []byte) error
// generateStorages generates the missing storage slots of the specific contract.
// It's supposed to restart the generation from the given origin position.
func generateStorages(ctx *generatorContext, dl *diskLayer, account common.Hash, storageRoot common.Hash, storeMarker []byte) error {
func generateStorages(ctx *generatorContext, dl *diskLayer, stateRoot common.Hash, account common.Hash, storageRoot common.Hash, storeMarker []byte) error {
onStorage := func(key []byte, val []byte, write bool, delete bool) error {
defer func(start time.Time) {
snapStorageWriteCounter.Inc(time.Since(start).Nanoseconds())
@ -540,7 +541,8 @@ func generateStorages(ctx *generatorContext, dl *diskLayer, account common.Hash,
// Loop for re-generating the missing storage slots.
var origin = common.CopyBytes(storeMarker)
for {
exhausted, last, err := dl.generateRange(ctx, account, storageRoot, append(rawdb.SnapshotStoragePrefix, account.Bytes()...), snapStorage, origin, storageCheckRange, onStorage, nil)
id := trie.StorageTrieID(stateRoot, account, storageRoot)
exhausted, last, err := dl.generateRange(ctx, id, append(rawdb.SnapshotStoragePrefix, account.Bytes()...), snapStorage, origin, storageCheckRange, onStorage, nil)
if err != nil {
return err // The procedure it aborted, either by external signal or internal error.
}
@ -624,7 +626,7 @@ func generateAccounts(ctx *generatorContext, dl *diskLayer, accMarker []byte) er
if accMarker != nil && bytes.Equal(account[:], accMarker) && len(dl.genMarker) > common.HashLength {
storeMarker = dl.genMarker[common.HashLength:]
}
if err := generateStorages(ctx, dl, account, acc.Root, storeMarker); err != nil {
if err := generateStorages(ctx, dl, dl.root, account, acc.Root, storeMarker); err != nil {
return err
}
}
@ -640,7 +642,8 @@ func generateAccounts(ctx *generatorContext, dl *diskLayer, accMarker []byte) er
}
origin := common.CopyBytes(accMarker)
for {
exhausted, last, err := dl.generateRange(ctx, common.Hash{}, dl.root, rawdb.SnapshotAccountPrefix, snapAccount, origin, accountRange, onAccount, FullAccountRLP)
id := trie.StateTrieID(dl.root)
exhausted, last, err := dl.generateRange(ctx, id, rawdb.SnapshotAccountPrefix, snapAccount, origin, accountRange, onAccount, FullAccountRLP)
if err != nil {
return err // The procedure it aborted, either by external signal or internal error.
}

5
core/state/snapshot/generate_test.go
View File

@ -149,7 +149,7 @@ type testHelper struct {
func newHelper() *testHelper {
diskdb := rawdb.NewMemoryDatabase()
triedb := trie.NewDatabase(diskdb)
accTrie, _ := trie.NewStateTrie(common.Hash{}, common.Hash{}, triedb)
accTrie, _ := trie.NewStateTrie(trie.StateTrieID(common.Hash{}), triedb)
return &testHelper{
diskdb: diskdb,
triedb: triedb,
@ -182,7 +182,8 @@ func (t *testHelper) addSnapStorage(accKey string, keys []string, vals []string)
}
func (t *testHelper) makeStorageTrie(stateRoot, owner common.Hash, keys []string, vals []string, commit bool) []byte {
stTrie, _ := trie.NewStateTrie(owner, common.Hash{}, t.triedb)
id := trie.StorageTrieID(stateRoot, owner, common.Hash{})
stTrie, _ := trie.NewStateTrie(id, t.triedb)
for i, k := range keys {
stTrie.Update([]byte(k), []byte(vals[i]))
}

4
core/state/state_object.go
View File

@ -159,9 +159,9 @@ func (s *stateObject) getTrie(db Database) Trie {
}
if s.trie == nil {
var err error
s.trie, err = db.OpenStorageTrie(s.addrHash, s.data.Root)
s.trie, err = db.OpenStorageTrie(s.db.originalRoot, s.addrHash, s.data.Root)
if err != nil {
s.trie, _ = db.OpenStorageTrie(s.addrHash, common.Hash{})
s.trie, _ = db.OpenStorageTrie(s.db.originalRoot, s.addrHash, common.Hash{})
s.setError(fmt.Errorf("can't create storage trie: %v", err))
}
}

41
core/state/statedb.go
View File

@ -120,6 +120,7 @@ type StateDB struct {
SnapshotAccountReads time.Duration
SnapshotStorageReads time.Duration
SnapshotCommits time.Duration
TrieDBCommits time.Duration
AccountUpdated int
StorageUpdated int
@ -904,8 +905,10 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
// Commit objects to the trie, measuring the elapsed time
var (
accountTrieNodes int
storageTrieNodes int
accountTrieNodesUpdated int
accountTrieNodesDeleted int
storageTrieNodesUpdated int
storageTrieNodesDeleted int
nodes = trie.NewMergedNodeSet()
)
codeWriter := s.db.DiskDB().NewBatch()
@ -926,7 +929,9 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
if err := nodes.Merge(set); err != nil {
return common.Hash{}, err
}
storageTrieNodes += set.Len()
updates, deleted := set.Size()
storageTrieNodesUpdated += updates
storageTrieNodesDeleted += deleted
}
}
}
@ -952,7 +957,7 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
if err := nodes.Merge(set); err != nil {
return common.Hash{}, err
}
accountTrieNodes = set.Len()
accountTrieNodesUpdated, accountTrieNodesDeleted = set.Size()
}
if metrics.EnabledExpensive {
s.AccountCommits += time.Since(start)
@ -961,16 +966,16 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
storageUpdatedMeter.Mark(int64(s.StorageUpdated))
accountDeletedMeter.Mark(int64(s.AccountDeleted))
storageDeletedMeter.Mark(int64(s.StorageDeleted))
accountTrieCommittedMeter.Mark(int64(accountTrieNodes))
storageTriesCommittedMeter.Mark(int64(storageTrieNodes))
accountTrieUpdatedMeter.Mark(int64(accountTrieNodesUpdated))
accountTrieDeletedMeter.Mark(int64(accountTrieNodesDeleted))
storageTriesUpdatedMeter.Mark(int64(storageTrieNodesUpdated))
storageTriesDeletedMeter.Mark(int64(storageTrieNodesDeleted))
s.AccountUpdated, s.AccountDeleted = 0, 0
s.StorageUpdated, s.StorageDeleted = 0, 0
}
// If snapshotting is enabled, update the snapshot tree with this new version
if s.snap != nil {
if metrics.EnabledExpensive {
defer func(start time.Time) { s.SnapshotCommits += time.Since(start) }(time.Now())
}
start := time.Now()
// Only update if there's a state transition (skip empty Clique blocks)
if parent := s.snap.Root(); parent != root {
if err := s.snaps.Update(root, parent, s.snapDestructs, s.snapAccounts, s.snapStorage); err != nil {
@ -984,13 +989,29 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
log.Warn("Failed to cap snapshot tree", "root", root, "layers", 128, "err", err)
}
}
if metrics.EnabledExpensive {
s.SnapshotCommits += time.Since(start)
}
s.snap, s.snapDestructs, s.snapAccounts, s.snapStorage = nil, nil, nil, nil
}
if root == (common.Hash{}) {
root = emptyRoot
}
origin := s.originalRoot
if origin == (common.Hash{}) {
origin = emptyRoot
}
if root != origin {
start := time.Now()
if err := s.db.TrieDB().Update(nodes); err != nil {
return common.Hash{}, err
}
s.originalRoot = root
return root, err
if metrics.EnabledExpensive {
s.TrieDBCommits += time.Since(start)
}
}
return root, nil
}
// PrepareAccessList handles the preparatory steps for executing a state transition with

7
core/state/sync_test.go
View File

@ -104,7 +104,7 @@ func checkTrieConsistency(db ethdb.KeyValueStore, root common.Hash) error {
if v, _ := db.Get(root[:]); v == nil {
return nil // Consider a non existent state consistent.
}
trie, err := trie.New(common.Hash{}, root, trie.NewDatabase(db))
trie, err := trie.New(trie.StateTrieID(root), trie.NewDatabase(db))
if err != nil {
return err
}
@ -174,7 +174,7 @@ func testIterativeStateSync(t *testing.T, count int, commit bool, bypath bool) {
if commit {
srcDb.TrieDB().Commit(srcRoot, false, nil)
}
srcTrie, _ := trie.New(common.Hash{}, srcRoot, srcDb.TrieDB())
srcTrie, _ := trie.New(trie.StateTrieID(srcRoot), srcDb.TrieDB())
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
@ -222,7 +222,8 @@ func testIterativeStateSync(t *testing.T, count int, commit bool, bypath bool) {
if err := rlp.DecodeBytes(srcTrie.Get(node.syncPath[0]), &acc); err != nil {
t.Fatalf("failed to decode account on path %x: %v", node.syncPath[0], err)
}
stTrie, err := trie.New(common.BytesToHash(node.syncPath[0]), acc.Root, srcDb.TrieDB())
id := trie.StorageTrieID(srcRoot, common.BytesToHash(node.syncPath[0]), acc.Root)
stTrie, err := trie.New(id, srcDb.TrieDB())
if err != nil {
t.Fatalf("failed to retriev storage trie for path %x: %v", node.syncPath[1], err)
}

8
core/state/trie_prefetcher.go
View File

@ -150,7 +150,7 @@ func (p *triePrefetcher) prefetch(owner common.Hash, root common.Hash, keys [][]
id := p.trieID(owner, root)
fetcher := p.fetchers[id]
if fetcher == nil {
fetcher = newSubfetcher(p.db, owner, root)
fetcher = newSubfetcher(p.db, p.root, owner, root)
p.fetchers[id] = fetcher
}
fetcher.schedule(keys)
@ -206,6 +206,7 @@ func (p *triePrefetcher) trieID(owner common.Hash, root common.Hash) string {
// the trie being worked on is retrieved from the prefetcher.
type subfetcher struct {
db Database // Database to load trie nodes through
state common.Hash // Root hash of the state to prefetch
owner common.Hash // Owner of the trie, usually account hash
root common.Hash // Root hash of the trie to prefetch
trie Trie // Trie being populated with nodes
@ -225,9 +226,10 @@ type subfetcher struct {
// newSubfetcher creates a goroutine to prefetch state items belonging to a
// particular root hash.
func newSubfetcher(db Database, owner common.Hash, root common.Hash) *subfetcher {
func newSubfetcher(db Database, state common.Hash, owner common.Hash, root common.Hash) *subfetcher {
sf := &subfetcher{
db: db,
state: state,
owner: owner,
root: root,
wake: make(chan struct{}, 1),
@ -298,7 +300,7 @@ func (sf *subfetcher) loop() {
}
sf.trie = trie
} else {
trie, err := sf.db.OpenStorageTrie(sf.owner, sf.root)
trie, err := sf.db.OpenStorageTrie(sf.state, sf.owner, sf.root)
if err != nil {
log.Warn("Trie prefetcher failed opening trie", "root", sf.root, "err", err)
return

4
eth/api.go
View File

@ -508,11 +508,11 @@ func (api *DebugAPI) getModifiedAccounts(startBlock, endBlock *types.Block) ([]c
}
triedb := api.eth.BlockChain().StateCache().TrieDB()
oldTrie, err := trie.NewStateTrie(common.Hash{}, startBlock.Root(), triedb)
oldTrie, err := trie.NewStateTrie(trie.StateTrieID(startBlock.Root()), triedb)
if err != nil {
return nil, err
}
newTrie, err := trie.NewStateTrie(common.Hash{}, endBlock.Root(), triedb)
newTrie, err := trie.NewStateTrie(trie.StateTrieID(endBlock.Root()), triedb)
if err != nil {
return nil, err
}

12
eth/protocols/snap/handler.go
View File

@ -283,7 +283,7 @@ func ServiceGetAccountRangeQuery(chain *core.BlockChain, req *GetAccountRangePac
req.Bytes = softResponseLimit
}
// Retrieve the requested state and bail out if non existent
tr, err := trie.New(common.Hash{}, req.Root, chain.StateCache().TrieDB())
tr, err := trie.New(trie.StateTrieID(req.Root), chain.StateCache().TrieDB())
if err != nil {
return nil, nil
}
@ -413,7 +413,7 @@ func ServiceGetStorageRangesQuery(chain *core.BlockChain, req *GetStorageRangesP
if origin != (common.Hash{}) || (abort && len(storage) > 0) {
// Request started at a non-zero hash or was capped prematurely, add
// the endpoint Merkle proofs
accTrie, err := trie.NewStateTrie(common.Hash{}, req.Root, chain.StateCache().TrieDB())
accTrie, err := trie.NewStateTrie(trie.StateTrieID(req.Root), chain.StateCache().TrieDB())
if err != nil {
return nil, nil
}
@ -421,7 +421,8 @@ func ServiceGetStorageRangesQuery(chain *core.BlockChain, req *GetStorageRangesP
if err != nil || acc == nil {
return nil, nil
}
stTrie, err := trie.NewStateTrie(account, acc.Root, chain.StateCache().TrieDB())
id := trie.StorageTrieID(req.Root, account, acc.Root)
stTrie, err := trie.NewStateTrie(id, chain.StateCache().TrieDB())
if err != nil {
return nil, nil
}
@ -487,7 +488,7 @@ func ServiceGetTrieNodesQuery(chain *core.BlockChain, req *GetTrieNodesPacket, s
// Make sure we have the state associated with the request
triedb := chain.StateCache().TrieDB()
accTrie, err := trie.NewStateTrie(common.Hash{}, req.Root, triedb)
accTrie, err := trie.NewStateTrie(trie.StateTrieID(req.Root), triedb)
if err != nil {
// We don't have the requested state available, bail out
return nil, nil
@ -529,7 +530,8 @@ func ServiceGetTrieNodesQuery(chain *core.BlockChain, req *GetTrieNodesPacket, s
if err != nil || account == nil {
break
}
stTrie, err := trie.NewStateTrie(common.BytesToHash(pathset[0]), common.BytesToHash(account.Root), triedb)
id := trie.StorageTrieID(req.Root, common.BytesToHash(pathset[0]), common.BytesToHash(account.Root))
stTrie, err := trie.NewStateTrie(id, triedb)
loads++ // always account database reads, even for failures
if err != nil {
break

23
eth/protocols/snap/sync_test.go
View File

@ -1372,7 +1372,7 @@ func makeAccountTrieNoStorage(n int) (*trie.Trie, entrySlice) {
root, nodes, _ := accTrie.Commit(false)
db.Update(trie.NewWithNodeSet(nodes))
accTrie, _ = trie.New(common.Hash{}, root, db)
accTrie, _ = trie.New(trie.StateTrieID(root), db)
return accTrie, entries
}
@ -1434,7 +1434,7 @@ func makeBoundaryAccountTrie(n int) (*trie.Trie, entrySlice) {
root, nodes, _ := accTrie.Commit(false)
db.Update(trie.NewWithNodeSet(nodes))
accTrie, _ = trie.New(common.Hash{}, root, db)
accTrie, _ = trie.New(trie.StateTrieID(root), db)
return accTrie, entries
}
@ -1484,10 +1484,11 @@ func makeAccountTrieWithStorageWithUniqueStorage(accounts, slots int, code bool)
db.Update(nodes)
// Re-create tries with new root
accTrie, _ = trie.New(common.Hash{}, root, db)
accTrie, _ = trie.New(trie.StateTrieID(root), db)
for i := uint64(1); i <= uint64(accounts); i++ {
key := key32(i)
trie, _ := trie.New(common.BytesToHash(key), storageRoots[common.BytesToHash(key)], db)
id := trie.StorageTrieID(root, common.BytesToHash(key), storageRoots[common.BytesToHash(key)])
trie, _ := trie.New(id, db)
storageTries[common.BytesToHash(key)] = trie
}
return accTrie, entries, storageTries, storageEntries
@ -1548,13 +1549,14 @@ func makeAccountTrieWithStorage(accounts, slots int, code, boundary bool) (*trie
db.Update(nodes)
// Re-create tries with new root
accTrie, err := trie.New(common.Hash{}, root, db)
accTrie, err := trie.New(trie.StateTrieID(root), db)
if err != nil {
panic(err)
}
for i := uint64(1); i <= uint64(accounts); i++ {
key := key32(i)
trie, err := trie.New(common.BytesToHash(key), storageRoots[common.BytesToHash(key)], db)
id := trie.StorageTrieID(root, common.BytesToHash(key), storageRoots[common.BytesToHash(key)])
trie, err := trie.New(id, db)
if err != nil {
panic(err)
}
@ -1567,7 +1569,7 @@ func makeAccountTrieWithStorage(accounts, slots int, code, boundary bool) (*trie
// not-yet-committed trie and the sorted entries. The seeds can be used to ensure
// that tries are unique.
func makeStorageTrieWithSeed(owner common.Hash, n, seed uint64, db *trie.Database) (common.Hash, *trie.NodeSet, entrySlice) {
trie, _ := trie.New(owner, common.Hash{}, db)
trie, _ := trie.New(trie.StorageTrieID(common.Hash{}, owner, common.Hash{}), db)
var entries entrySlice
for i := uint64(1); i <= n; i++ {
// store 'x' at slot 'x'
@ -1593,7 +1595,7 @@ func makeBoundaryStorageTrie(owner common.Hash, n int, db *trie.Database) (commo
var (
entries entrySlice
boundaries []common.Hash
trie, _ = trie.New(owner, common.Hash{}, db)
trie, _ = trie.New(trie.StorageTrieID(common.Hash{}, owner, common.Hash{}), db)
)
// Initialize boundaries
var next common.Hash
@ -1640,7 +1642,7 @@ func makeBoundaryStorageTrie(owner common.Hash, n int, db *trie.Database) (commo
func verifyTrie(db ethdb.KeyValueStore, root common.Hash, t *testing.T) {
t.Helper()
triedb := trie.NewDatabase(db)
accTrie, err := trie.New(common.Hash{}, root, triedb)
accTrie, err := trie.New(trie.StateTrieID(root), triedb)
if err != nil {
t.Fatal(err)
}
@ -1658,7 +1660,8 @@ func verifyTrie(db ethdb.KeyValueStore, root common.Hash, t *testing.T) {
}
accounts++
if acc.Root != emptyRoot {
storeTrie, err := trie.NewStateTrie(common.BytesToHash(accIt.Key), acc.Root, triedb)
id := trie.StorageTrieID(root, common.BytesToHash(accIt.Key), acc.Root)
storeTrie, err := trie.NewStateTrie(id, triedb)
if err != nil {
t.Fatal(err)
}

2
les/downloader/downloader_test.go
View File

@ -229,7 +229,7 @@ func (dl *downloadTester) CurrentFastBlock() *types.Block {
func (dl *downloadTester) FastSyncCommitHead(hash common.Hash) error {
// For now only check that the state trie is correct
if block := dl.GetBlockByHash(hash); block != nil {
_, err := trie.NewStateTrie(common.Hash{}, block.Root(), trie.NewDatabase(dl.stateDb))
_, err := trie.NewStateTrie(trie.StateTrieID(block.Root()), trie.NewDatabase(dl.stateDb))
return err
}
return fmt.Errorf("non existent block: %x", hash[:4])

8
les/handler_test.go
View File

@ -405,7 +405,7 @@ func testGetProofs(t *testing.T, protocol int) {
accounts := []common.Address{bankAddr, userAddr1, userAddr2, signerAddr, {}}
for i := uint64(0); i <= bc.CurrentBlock().NumberU64(); i++ {
header := bc.GetHeaderByNumber(i)
trie, _ := trie.New(common.Hash{}, header.Root, trie.NewDatabase(server.db))
trie, _ := trie.New(trie.StateTrieID(header.Root), trie.NewDatabase(server.db))
for _, acc := range accounts {
req := ProofReq{
@ -456,7 +456,7 @@ func testGetStaleProof(t *testing.T, protocol int) {
var expected []rlp.RawValue
if wantOK {
proofsV2 := light.NewNodeSet()
t, _ := trie.New(common.Hash{}, header.Root, trie.NewDatabase(server.db))
t, _ := trie.New(trie.StateTrieID(header.Root), trie.NewDatabase(server.db))
t.Prove(account, 0, proofsV2)
expected = proofsV2.NodeList()
}
@ -512,7 +512,7 @@ func testGetCHTProofs(t *testing.T, protocol int) {
AuxData: [][]byte{rlp},
}
root := light.GetChtRoot(server.db, 0, bc.GetHeaderByNumber(config.ChtSize-1).Hash())
trie, _ := trie.New(common.Hash{}, root, trie.NewDatabase(rawdb.NewTable(server.db, light.ChtTablePrefix)))
trie, _ := trie.New(trie.TrieID(root), trie.NewDatabase(rawdb.NewTable(server.db, light.ChtTablePrefix)))
trie.Prove(key, 0, &proofsV2.Proofs)
// Assemble the requests for the different protocols
requestsV2 := []HelperTrieReq{{
@ -577,7 +577,7 @@ func testGetBloombitsProofs(t *testing.T, protocol int) {
var proofs HelperTrieResps
root := light.GetBloomTrieRoot(server.db, 0, bc.GetHeaderByNumber(config.BloomTrieSize-1).Hash())
trie, _ := trie.New(common.Hash{}, root, trie.NewDatabase(rawdb.NewTable(server.db, light.BloomTrieTablePrefix)))
trie, _ := trie.New(trie.TrieID(root), trie.NewDatabase(rawdb.NewTable(server.db, light.BloomTrieTablePrefix)))
trie.Prove(key, 0, &proofs.Proofs)
// Send the proof request and verify the response

1
les/request_test.go
View File

@ -104,6 +104,7 @@ func testAccess(t *testing.T, protocol int, fn accessTestFn) {
bhash := rawdb.ReadCanonicalHash(server.db, i)
if req := fn(client.db, bhash, i); req != nil {
ctx, cancel := context.WithTimeout(context.Background(), 200*time.Millisecond)
err := client.handler.backend.odr.Retrieve(ctx, req)
cancel()

4
les/server_handler.go
View File

@ -359,7 +359,7 @@ func (h *serverHandler) AddTxsSync() bool {
// getAccount retrieves an account from the state based on root.
func getAccount(triedb *trie.Database, root, hash common.Hash) (types.StateAccount, error) {
trie, err := trie.New(common.Hash{}, root, triedb)
trie, err := trie.New(trie.StateTrieID(root), triedb)
if err != nil {
return types.StateAccount{}, err
}
@ -391,7 +391,7 @@ func (h *serverHandler) GetHelperTrie(typ uint, index uint64) *trie.Trie {
if root == (common.Hash{}) {
return nil
}
trie, _ := trie.New(common.Hash{}, root, trie.NewDatabase(rawdb.NewTable(h.chainDb, prefix)))
trie, _ := trie.New(trie.TrieID(root), trie.NewDatabase(rawdb.NewTable(h.chainDb, prefix)))
return trie
}

2
les/server_requests.go
View File

@ -428,7 +428,7 @@ func handleGetProofs(msg Decoder) (serveRequestFn, uint64, uint64, error) {
p.bumpInvalid()
continue
}
trie, err = statedb.OpenStorageTrie(common.BytesToHash(request.AccKey), account.Root)
trie, err = statedb.OpenStorageTrie(root, common.BytesToHash(request.AccKey), account.Root)
if trie == nil || err != nil {
p.Log().Warn("Failed to open storage trie for proof", "block", header.Number, "hash", header.Hash(), "account", common.BytesToHash(request.AccKey), "root", account.Root, "err", err)
continue

8
light/odr.go
View File

@ -53,8 +53,10 @@ type OdrRequest interface {
// TrieID identifies a state or account storage trie
type TrieID struct {
BlockHash, Root common.Hash
BlockHash common.Hash
BlockNumber uint64
StateRoot common.Hash
Root common.Hash
AccKey []byte
}
@ -64,8 +66,9 @@ func StateTrieID(header *types.Header) *TrieID {
return &TrieID{
BlockHash: header.Hash(),
BlockNumber: header.Number.Uint64(),
AccKey: nil,
StateRoot: header.Root,
Root: header.Root,
AccKey: nil,
}
}
@ -76,6 +79,7 @@ func StorageTrieID(state *TrieID, addrHash, root common.Hash) *TrieID {
return &TrieID{
BlockHash: state.BlockHash,
BlockNumber: state.BlockNumber,
StateRoot: state.StateRoot,
AccKey: addrHash[:],
Root: root,
}

2
light/odr_test.go
View File

@ -87,7 +87,7 @@ func (odr *testOdr) Retrieve(ctx context.Context, req OdrRequest) error {
t state.Trie
)
if len(req.Id.AccKey) > 0 {
t, err = odr.serverState.OpenStorageTrie(common.BytesToHash(req.Id.AccKey), req.Id.Root)
t, err = odr.serverState.OpenStorageTrie(req.Id.StateRoot, common.BytesToHash(req.Id.AccKey), req.Id.Root)
} else {
t, err = odr.serverState.OpenTrie(req.Id.Root)
}

77
light/postprocess.go
View File

@ -25,7 +25,6 @@ import (
"math/big"
"time"
mapset "github.com/deckarep/golang-set"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/bitutil"
"github.com/ethereum/go-ethereum/core"
@ -134,7 +133,6 @@ type ChtIndexerBackend struct {
diskdb, trieTable ethdb.Database
odr OdrBackend
triedb *trie.Database
trieset mapset.Set
section, sectionSize uint64
lastHash common.Hash
trie *trie.Trie
@ -148,7 +146,6 @@ func NewChtIndexer(db ethdb.Database, odr OdrBackend, size, confirms uint64, dis
odr: odr,
trieTable: trieTable,
triedb: trie.NewDatabaseWithConfig(trieTable, &trie.Config{Cache: 1}), // Use a tiny cache only to keep memory down
trieset: mapset.NewSet(),
sectionSize: size,
disablePruning: disablePruning,
}
@ -187,12 +184,12 @@ func (c *ChtIndexerBackend) Reset(ctx context.Context, section uint64, lastSecti
root = GetChtRoot(c.diskdb, section-1, lastSectionHead)
}
var err error
c.trie, err = trie.New(common.Hash{}, root, c.triedb)
c.trie, err = trie.New(trie.TrieID(root), c.triedb)
if err != nil && c.odr != nil {
err = c.fetchMissingNodes(ctx, section, root)
if err == nil {
c.trie, err = trie.New(common.Hash{}, root, c.triedb)
c.trie, err = trie.New(trie.TrieID(root), c.triedb)
}
}
c.section = section
@ -226,38 +223,44 @@ func (c *ChtIndexerBackend) Commit() error {
if err := c.triedb.Update(trie.NewWithNodeSet(nodes)); err != nil {
return err
}
if err := c.triedb.Commit(root, false, nil); err != nil {
return err
}
}
// Re-create trie with newly generated root and updated database.
c.trie, err = trie.New(common.Hash{}, root, c.triedb)
c.trie, err = trie.New(trie.TrieID(root), c.triedb)
if err != nil {
return err
}
// Pruning historical trie nodes if necessary.
if !c.disablePruning {
// Flush the triedb and track the latest trie nodes.
c.trieset.Clear()
c.triedb.Commit(root, false, func(hash common.Hash) { c.trieset.Add(hash) })
it := c.trieTable.NewIterator(nil, nil)
defer it.Release()
var (
deleted int
remaining int
batch = c.trieTable.NewBatch()
t = time.Now()
)
hashes := make(map[common.Hash]struct{})
if nodes != nil {
for _, hash := range nodes.Hashes() {
hashes[hash] = struct{}{}
}
}
for it.Next() {
trimmed := bytes.TrimPrefix(it.Key(), []byte(ChtTablePrefix))
if !c.trieset.Contains(common.BytesToHash(trimmed)) {
c.trieTable.Delete(trimmed)
if len(trimmed) == common.HashLength {
if _, ok := hashes[common.BytesToHash(trimmed)]; !ok {
batch.Delete(trimmed)
deleted += 1
} else {
remaining += 1
}
}
log.Debug("Prune historical CHT trie nodes", "deleted", deleted, "remaining", remaining, "elapsed", common.PrettyDuration(time.Since(t)))
} else {
c.triedb.Commit(root, false, nil)
}
if err := batch.Write(); err != nil {
return err
}
log.Debug("Prune historical CHT trie nodes", "deleted", deleted, "remaining", len(hashes), "elapsed", common.PrettyDuration(time.Since(t)))
}
log.Info("Storing CHT", "section", c.section, "head", fmt.Sprintf("%064x", c.lastHash), "root", fmt.Sprintf("%064x", root))
StoreChtRoot(c.diskdb, c.section, c.lastHash, root)
@ -333,7 +336,6 @@ type BloomTrieIndexerBackend struct {
disablePruning bool
diskdb, trieTable ethdb.Database
triedb *trie.Database
trieset mapset.Set
odr OdrBackend
section uint64
parentSize uint64
@ -351,7 +353,6 @@ func NewBloomTrieIndexer(db ethdb.Database, odr OdrBackend, parentSize, size uin
odr: odr,
trieTable: trieTable,
triedb: trie.NewDatabaseWithConfig(trieTable, &trie.Config{Cache: 1}), // Use a tiny cache only to keep memory down
trieset: mapset.NewSet(),
parentSize: parentSize,
size: size,
disablePruning: disablePruning,
@ -414,11 +415,11 @@ func (b *BloomTrieIndexerBackend) Reset(ctx context.Context, section uint64, las
root = GetBloomTrieRoot(b.diskdb, section-1, lastSectionHead)
}
var err error
b.trie, err = trie.New(common.Hash{}, root, b.triedb)
b.trie, err = trie.New(trie.TrieID(root), b.triedb)
if err != nil && b.odr != nil {
err = b.fetchMissingNodes(ctx, section, root)
if err == nil {
b.trie, err = trie.New(common.Hash{}, root, b.triedb)
b.trie, err = trie.New(trie.TrieID(root), b.triedb)
}
}
b.section = section
@ -473,38 +474,44 @@ func (b *BloomTrieIndexerBackend) Commit() error {
if err := b.triedb.Update(trie.NewWithNodeSet(nodes)); err != nil {
return err
}
if err := b.triedb.Commit(root, false, nil); err != nil {
return err
}
}
// Re-create trie with newly generated root and updated database.
b.trie, err = trie.New(common.Hash{}, root, b.triedb)
b.trie, err = trie.New(trie.TrieID(root), b.triedb)
if err != nil {
return err
}
// Pruning historical trie nodes if necessary.
if !b.disablePruning {
// Flush the triedb and track the latest trie nodes.
b.trieset.Clear()
b.triedb.Commit(root, false, func(hash common.Hash) { b.trieset.Add(hash) })
it := b.trieTable.NewIterator(nil, nil)
defer it.Release()
var (
deleted int
remaining int
batch = b.trieTable.NewBatch()
t = time.Now()
)
hashes := make(map[common.Hash]struct{})
if nodes != nil {
for _, hash := range nodes.Hashes() {
hashes[hash] = struct{}{}
}
}
for it.Next() {
trimmed := bytes.TrimPrefix(it.Key(), []byte(BloomTrieTablePrefix))
if !b.trieset.Contains(common.BytesToHash(trimmed)) {
b.trieTable.Delete(trimmed)
if len(trimmed) == common.HashLength {
if _, ok := hashes[common.BytesToHash(trimmed)]; !ok {
batch.Delete(trimmed)
deleted += 1
} else {
remaining += 1
}
}
log.Debug("Prune historical bloom trie nodes", "deleted", deleted, "remaining", remaining, "elapsed", common.PrettyDuration(time.Since(t)))
} else {
b.triedb.Commit(root, false, nil)
}
if err := batch.Write(); err != nil {
return err
}
log.Debug("Prune historical bloom trie nodes", "deleted", deleted, "remaining", len(hashes), "elapsed", common.PrettyDuration(time.Since(t)))
}
sectionHead := b.sectionHeads[b.bloomTrieRatio-1]
StoreBloomTrieRoot(b.diskdb, b.section, sectionHead, root)

21
light/trie.go
View File

@ -54,7 +54,7 @@ func (db *odrDatabase) OpenTrie(root common.Hash) (state.Trie, error) {
return &odrTrie{db: db, id: db.id}, nil
}
func (db *odrDatabase) OpenStorageTrie(addrHash, root common.Hash) (state.Trie, error) {
func (db *odrDatabase) OpenStorageTrie(state, addrHash, root common.Hash) (state.Trie, error) {
return &odrTrie{db: db, id: StorageTrieID(db.id, addrHash, root)}, nil
}
@ -63,8 +63,7 @@ func (db *odrDatabase) CopyTrie(t state.Trie) state.Trie {
case *odrTrie:
cpy := &odrTrie{db: t.db, id: t.id}
if t.trie != nil {
cpytrie := *t.trie
cpy.trie = &cpytrie
cpy.trie = t.trie.Copy()
}
return cpy
default:
@ -197,11 +196,13 @@ func (t *odrTrie) do(key []byte, fn func() error) error {
for {
var err error
if t.trie == nil {
var owner common.Hash
var id *trie.ID
if len(t.id.AccKey) > 0 {
owner = common.BytesToHash(t.id.AccKey)
id = trie.StorageTrieID(t.id.StateRoot, common.BytesToHash(t.id.AccKey), t.id.Root)
} else {
id = trie.StateTrieID(t.id.StateRoot)
}
t.trie, err = trie.New(owner, t.id.Root, trie.NewDatabase(t.db.backend.Database()))
t.trie, err = trie.New(id, trie.NewDatabase(t.db.backend.Database()))
}
if err == nil {
err = fn()
@ -227,11 +228,13 @@ func newNodeIterator(t *odrTrie, startkey []byte) trie.NodeIterator {
// Open the actual non-ODR trie if that hasn't happened yet.
if t.trie == nil {
it.do(func() error {
var owner common.Hash
var id *trie.ID
if len(t.id.AccKey) > 0 {
owner = common.BytesToHash(t.id.AccKey)
id = trie.StorageTrieID(t.id.StateRoot, common.BytesToHash(t.id.AccKey), t.id.Root)
} else {
id = trie.StateTrieID(t.id.StateRoot)
}
t, err := trie.New(owner, t.id.Root, trie.NewDatabase(t.db.backend.Database()))
t, err := trie.New(id, trie.NewDatabase(t.db.backend.Database()))
if err == nil {
it.t.trie = t
}

3
tests/fuzzers/trie/trie-fuzzer.go
View File

@ -21,7 +21,6 @@ import (
"encoding/binary"
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethdb/memorydb"
"github.com/ethereum/go-ethereum/trie"
)
@ -170,7 +169,7 @@ func runRandTest(rt randTest) error {
return err
}
}
newtr, err := trie.New(common.Hash{}, hash, triedb)
newtr, err := trie.New(trie.TrieID(hash), triedb)
if err != nil {
return err
}

32
trie/committer.go
View File

@ -33,13 +33,15 @@ type leaf struct {
// insertion order.
type committer struct {
nodes *NodeSet
tracer *tracer
collectLeaf bool
}
// newCommitter creates a new committer or picks one from the pool.
func newCommitter(owner common.Hash, collectLeaf bool) *committer {
func newCommitter(owner common.Hash, tracer *tracer, collectLeaf bool) *committer {
return &committer{
nodes: NewNodeSet(owner),
tracer: tracer,
collectLeaf: collectLeaf,
}
}
@ -51,6 +53,20 @@ func (c *committer) Commit(n node) (hashNode, *NodeSet, error) {
if err != nil {
return nil, nil, err
}
// Some nodes can be deleted from trie which can't be captured by committer
// itself. Iterate all deleted nodes tracked by tracer and marked them as
// deleted only if they are present in database previously.
for _, path := range c.tracer.deleteList() {
// There are a few possibilities for this scenario(the node is deleted
// but not present in database previously), for example the node was
// embedded in the parent and now deleted from the trie. In this case
// it's noop from database's perspective.
val := c.tracer.getPrev(path)
if len(val) == 0 {
continue
}
c.nodes.markDeleted(path, val)
}
return h.(hashNode), c.nodes, nil
}
@ -83,6 +99,12 @@ func (c *committer) commit(path []byte, n node) (node, error) {
if hn, ok := hashedNode.(hashNode); ok {
return hn, nil
}
// The short node now is embedded in its parent. Mark the node as
// deleted if it's present in database previously. It's equivalent
// as deletion from database's perspective.
if prev := c.tracer.getPrev(path); len(prev) != 0 {
c.nodes.markDeleted(path, prev)
}
return collapsed, nil
case *fullNode:
hashedKids, err := c.commitChildren(path, cn)
@ -96,6 +118,12 @@ func (c *committer) commit(path []byte, n node) (node, error) {
if hn, ok := hashedNode.(hashNode); ok {
return hn, nil
}
// The full node now is embedded in its parent. Mark the node as
// deleted if it's present in database previously. It's equivalent
// as deletion from database's perspective.
if prev := c.tracer.getPrev(path); len(prev) != 0 {
c.nodes.markDeleted(path, prev)
}
return collapsed, nil
case hashNode:
return cn, nil
@ -161,7 +189,7 @@ func (c *committer) store(path []byte, n node) node {
}
)
// Collect the dirty node to nodeset for return.
c.nodes.add(string(path), mnode)
c.nodes.markUpdated(path, mnode, c.tracer.getPrev(path))
// Collect the corresponding leaf node if it's required. We don't check
// full node since it's impossible to store value in fullNode. The key

32
trie/database.go
View File

@ -795,8 +795,8 @@ func (db *Database) Update(nodes *MergedNodeSet) error {
}
for _, owner := range order {
subset := nodes.sets[owner]
for _, path := range subset.paths {
n, ok := subset.nodes[path]
for _, path := range subset.updates.order {
n, ok := subset.updates.nodes[path]
if !ok {
return fmt.Errorf("missing node %x %v", owner, path)
}
@ -837,6 +837,34 @@ func (db *Database) Size() (common.StorageSize, common.StorageSize) {
return db.dirtiesSize + db.childrenSize + metadataSize - metarootRefs, preimageSize
}
// GetReader retrieves a node reader belonging to the given state root.
func (db *Database) GetReader(root common.Hash) Reader {
return newHashReader(db)
}
// hashReader is reader of hashDatabase which implements the Reader interface.
type hashReader struct {
db *Database
}
// newHashReader initializes the hash reader.
func newHashReader(db *Database) *hashReader {
return &hashReader{db: db}
}
// Node retrieves the trie node with the given node hash.
// No error will be returned if the node is not found.
func (reader *hashReader) Node(_ common.Hash, _ []byte, hash common.Hash) (node, error) {
return reader.db.node(hash), nil
}
// NodeBlob retrieves the RLP-encoded trie node blob with the given node hash.
// No error will be returned if the node is not found.
func (reader *hashReader) NodeBlob(_ common.Hash, _ []byte, hash common.Hash) ([]byte, error) {
blob, _ := reader.db.Node(hash)
return blob, nil
}
// saveCache saves clean state cache to given directory path
// using specified CPU cores.
func (db *Database) saveCache(dir string, threads int) error {

14
trie/iterator.go
View File

@ -375,7 +375,12 @@ func (it *nodeIterator) resolveHash(hash hashNode, path []byte) (node, error) {
}
}
}
return it.trie.resolveHash(hash, path)
// Retrieve the specified node from the underlying node reader.
// it.trie.resolveAndTrack is not used since in that function the
// loaded blob will be tracked, while it's not required here since
// all loaded nodes won't be linked to trie at all and track nodes
// may lead to out-of-memory issue.
return it.trie.reader.node(path, common.BytesToHash(hash))
}
func (it *nodeIterator) resolveBlob(hash hashNode, path []byte) ([]byte, error) {
@ -384,7 +389,12 @@ func (it *nodeIterator) resolveBlob(hash hashNode, path []byte) ([]byte, error)
return blob, nil
}
}
return it.trie.resolveBlob(hash, path)
// Retrieve the specified node from the underlying node reader.
// it.trie.resolveAndTrack is not used since in that function the
// loaded blob will be tracked, while it's not required here since
// all loaded nodes won't be linked to trie at all and track nodes
// may lead to out-of-memory issue.
return it.trie.reader.nodeBlob(path, common.BytesToHash(hash))
}
func (st *nodeIteratorState) resolve(it *nodeIterator, path []byte) error {

16
trie/iterator_test.go
View File

@ -66,7 +66,7 @@ func TestIterator(t *testing.T) {
}
db.Update(NewWithNodeSet(nodes))
trie, _ = New(common.Hash{}, root, db)
trie, _ = New(TrieID(root), db)
found := make(map[string]string)
it := NewIterator(trie.NodeIterator(nil))
for it.Next() {
@ -227,7 +227,7 @@ func TestDifferenceIterator(t *testing.T) {
}
rootA, nodesA, _ := triea.Commit(false)
dba.Update(NewWithNodeSet(nodesA))
triea, _ = New(common.Hash{}, rootA, dba)
triea, _ = New(TrieID(rootA), dba)
dbb := NewDatabase(rawdb.NewMemoryDatabase())
trieb := NewEmpty(dbb)
@ -236,7 +236,7 @@ func TestDifferenceIterator(t *testing.T) {
}
rootB, nodesB, _ := trieb.Commit(false)
dbb.Update(NewWithNodeSet(nodesB))
trieb, _ = New(common.Hash{}, rootB, dbb)
trieb, _ = New(TrieID(rootB), dbb)
found := make(map[string]string)
di, _ := NewDifferenceIterator(triea.NodeIterator(nil), trieb.NodeIterator(nil))
@ -269,7 +269,7 @@ func TestUnionIterator(t *testing.T) {
}
rootA, nodesA, _ := triea.Commit(false)
dba.Update(NewWithNodeSet(nodesA))
triea, _ = New(common.Hash{}, rootA, dba)
triea, _ = New(TrieID(rootA), dba)
dbb := NewDatabase(rawdb.NewMemoryDatabase())
trieb := NewEmpty(dbb)
@ -278,7 +278,7 @@ func TestUnionIterator(t *testing.T) {
}
rootB, nodesB, _ := trieb.Commit(false)
dbb.Update(NewWithNodeSet(nodesB))
trieb, _ = New(common.Hash{}, rootB, dbb)
trieb, _ = New(TrieID(rootB), dbb)
di, _ := NewUnionIterator([]NodeIterator{triea.NodeIterator(nil), trieb.NodeIterator(nil)})
it := NewIterator(di)
@ -356,7 +356,7 @@ func testIteratorContinueAfterError(t *testing.T, memonly bool) {
}
for i := 0; i < 20; i++ {
// Create trie that will load all nodes from DB.
tr, _ := New(common.Hash{}, tr.Hash(), triedb)
tr, _ := New(TrieID(tr.Hash()), triedb)
// Remove a random node from the database. It can't be the root node
// because that one is already loaded.
@ -445,7 +445,7 @@ func testIteratorContinueAfterSeekError(t *testing.T, memonly bool) {
}
// Create a new iterator that seeks to "bars". Seeking can't proceed because
// the node is missing.
tr, _ := New(common.Hash{}, root, triedb)
tr, _ := New(TrieID(root), triedb)
it := tr.NodeIterator([]byte("bars"))
missing, ok := it.Error().(*MissingNodeError)
if !ok {
@ -533,7 +533,7 @@ func makeLargeTestTrie() (*Database, *StateTrie, *loggingDb) {
// Create an empty trie
logDb := &loggingDb{0, memorydb.New()}
triedb := NewDatabase(logDb)
trie, _ := NewStateTrie(common.Hash{}, common.Hash{}, triedb)
trie, _ := NewStateTrie(TrieID(common.Hash{}), triedb)
// Fill it with some arbitrary data
for i := 0; i < 10000; i++ {

143
trie/nodeset.go
View File

@ -18,6 +18,8 @@ package trie
import (
"fmt"
"reflect"
"strings"
"github.com/ethereum/go-ethereum/common"
)
@ -25,17 +27,76 @@ import (
// memoryNode is all the information we know about a single cached trie node
// in the memory.
type memoryNode struct {
hash common.Hash // Node hash, computed by hashing rlp value
size uint16 // Byte size of the useful cached data
node node // Cached collapsed trie node, or raw rlp data
hash common.Hash // Node hash, computed by hashing rlp value, empty for deleted nodes
size uint16 // Byte size of the useful cached data, 0 for deleted nodes
node node // Cached collapsed trie node, or raw rlp data, nil for deleted nodes
}
// memoryNodeSize is the raw size of a memoryNode data structure without any
// node data included. It's an approximate size, but should be a lot better
// than not counting them.
// nolint:unused
var memoryNodeSize = int(reflect.TypeOf(memoryNode{}).Size())
// memorySize returns the total memory size used by this node.
// nolint:unused
func (n *memoryNode) memorySize(key int) int {
return int(n.size) + memoryNodeSize + key
}
// rlp returns the raw rlp encoded blob of the cached trie node, either directly
// from the cache, or by regenerating it from the collapsed node.
// nolint:unused
func (n *memoryNode) rlp() []byte {
if node, ok := n.node.(rawNode); ok {
return node
}
return nodeToBytes(n.node)
}
// obj returns the decoded and expanded trie node, either directly from the cache,
// or by regenerating it from the rlp encoded blob.
// nolint:unused
func (n *memoryNode) obj() node {
if node, ok := n.node.(rawNode); ok {
return mustDecodeNode(n.hash[:], node)
}
return expandNode(n.hash[:], n.node)
}
// nodeWithPrev wraps the memoryNode with the previous node value.
type nodeWithPrev struct {
*memoryNode
prev []byte // RLP-encoded previous value, nil means it's non-existent
}
// unwrap returns the internal memoryNode object.
// nolint:unused
func (n *nodeWithPrev) unwrap() *memoryNode {
return n.memoryNode
}
// memorySize returns the total memory size used by this node. It overloads
// the function in memoryNode by counting the size of previous value as well.
// nolint: unused
func (n *nodeWithPrev) memorySize(key int) int {
return n.memoryNode.memorySize(key) + len(n.prev)
}
// nodesWithOrder represents a collection of dirty nodes which includes
// newly-inserted and updated nodes. The modification order of all nodes
// is represented by order list.
type nodesWithOrder struct {
order []string // the path list of dirty nodes, sort by insertion order
nodes map[string]*nodeWithPrev // the map of dirty nodes, keyed by node path
}
// NodeSet contains all dirty nodes collected during the commit operation.
// Each node is keyed by path. It's not thread-safe to use.
type NodeSet struct {
owner common.Hash // the identifier of the trie
paths []string // the path of dirty nodes, sort by insertion order
nodes map[string]*memoryNode // the map of dirty nodes, keyed by node path
updates *nodesWithOrder // the set of updated nodes(newly inserted, updated)
deletes map[string][]byte // the map of deleted nodes, keyed by node
leaves []*leaf // the list of dirty leaves
}
@ -45,24 +106,78 @@ type NodeSet struct {
func NewNodeSet(owner common.Hash) *NodeSet {
return &NodeSet{
owner: owner,
nodes: make(map[string]*memoryNode),
updates: &nodesWithOrder{
nodes: make(map[string]*nodeWithPrev),
},
deletes: make(map[string][]byte),
}
}
// add caches node with provided path and node object.
func (set *NodeSet) add(path string, node *memoryNode) {
set.paths = append(set.paths, path)
set.nodes[path] = node
// NewNodeSetWithDeletion initializes the nodeset with provided deletion set.
func NewNodeSetWithDeletion(owner common.Hash, paths [][]byte, prev [][]byte) *NodeSet {
set := NewNodeSet(owner)
for i, path := range paths {
set.markDeleted(path, prev[i])
}
return set
}
// addLeaf caches the provided leaf node.
// markUpdated marks the node as dirty(newly-inserted or updated) with provided
// node path, node object along with its previous value.
func (set *NodeSet) markUpdated(path []byte, node *memoryNode, prev []byte) {
set.updates.order = append(set.updates.order, string(path))
set.updates.nodes[string(path)] = &nodeWithPrev{
memoryNode: node,
prev: prev,
}
}
// markDeleted marks the node as deleted with provided path and previous value.
func (set *NodeSet) markDeleted(path []byte, prev []byte) {
set.deletes[string(path)] = prev
}
// addLeaf collects the provided leaf node into set.
func (set *NodeSet) addLeaf(node *leaf) {
set.leaves = append(set.leaves, node)
}
// Len returns the number of dirty nodes contained in the set.
func (set *NodeSet) Len() int {
return len(set.nodes)
// Size returns the number of updated and deleted nodes contained in the set.
func (set *NodeSet) Size() (int, int) {
return len(set.updates.order), len(set.deletes)
}
// Hashes returns the hashes of all updated nodes. TODO(rjl493456442) how can
// we get rid of it?
func (set *NodeSet) Hashes() []common.Hash {
var ret []common.Hash
for _, node := range set.updates.nodes {
ret = append(ret, node.hash)
}
return ret
}
// Summary returns a string-representation of the NodeSet.
func (set *NodeSet) Summary() string {
var out = new(strings.Builder)
fmt.Fprintf(out, "nodeset owner: %v\n", set.owner)
if set.updates != nil {
for _, key := range set.updates.order {
updated := set.updates.nodes[key]
if updated.prev != nil {
fmt.Fprintf(out, " [*]: %x -> %v prev: %x\n", key, updated.hash, updated.prev)
} else {
fmt.Fprintf(out, " [+]: %x -> %v\n", key, updated.hash)
}
}
}
for k, n := range set.deletes {
fmt.Fprintf(out, " [-]: %x -> %x\n", k, n)
}
for _, n := range set.leaves {
fmt.Fprintf(out, "[leaf]: %v\n", n)
}
return out.String()
}
// MergedNodeSet represents a merged dirty node set for a group of tries.

10
trie/proof.go
View File

@ -22,7 +22,6 @@ import (
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/log"
)
@ -60,8 +59,13 @@ func (t *Trie) Prove(key []byte, fromLevel uint, proofDb ethdb.KeyValueWriter) e
key = key[1:]
nodes = append(nodes, n)
case hashNode:
// Retrieve the specified node from the underlying node reader.
// trie.resolveAndTrack is not used since in that function the
// loaded blob will be tracked, while it's not required here since
// all loaded nodes won't be linked to trie at all and track nodes
// may lead to out-of-memory issue.
var err error
tn, err = t.resolveHash(n, prefix)
tn, err = t.reader.node(prefix, common.BytesToHash(n))
if err != nil {
log.Error("Unhandled trie error in Trie.Prove", "err", err)
return err
@ -559,7 +563,7 @@ func VerifyRangeProof(rootHash common.Hash, firstKey []byte, lastKey []byte, key
}
// Rebuild the trie with the leaf stream, the shape of trie
// should be same with the original one.
tr := &Trie{root: root, db: NewDatabase(rawdb.NewMemoryDatabase())}
tr := &Trie{root: root, reader: newEmptyReader()}
if empty {
tr.root = nil
}

13
trie/secure_trie.go
View File

@ -29,8 +29,13 @@ type SecureTrie = StateTrie
// NewSecure creates a new StateTrie.
// Deprecated: use NewStateTrie.
func NewSecure(owner common.Hash, root common.Hash, db *Database) (*SecureTrie, error) {
return NewStateTrie(owner, root, db)
func NewSecure(stateRoot common.Hash, owner common.Hash, root common.Hash, db *Database) (*SecureTrie, error) {
id := &ID{
StateRoot: stateRoot,
Owner: owner,
Root: root,
}
return NewStateTrie(id, db)
}
// StateTrie wraps a trie with key hashing. In a stateTrie trie, all
@ -56,11 +61,11 @@ type StateTrie struct {
// If root is the zero hash or the sha3 hash of an empty string, the
// trie is initially empty. Otherwise, New will panic if db is nil
// and returns MissingNodeError if the root node cannot be found.
func NewStateTrie(owner common.Hash, root common.Hash, db *Database) (*StateTrie, error) {
func NewStateTrie(id *ID, db *Database) (*StateTrie, error) {
if db == nil {
panic("trie.NewStateTrie called without a database")
}
trie, err := New(owner, root, db)
trie, err := New(id, db)
if err != nil {
return nil, err
}

6
trie/secure_trie_test.go
View File

@ -29,7 +29,7 @@ import (
)
func newEmptySecure() *StateTrie {
trie, _ := NewStateTrie(common.Hash{}, common.Hash{}, NewDatabase(memorydb.New()))
trie, _ := NewStateTrie(TrieID(common.Hash{}), NewDatabase(memorydb.New()))
return trie
}
@ -37,7 +37,7 @@ func newEmptySecure() *StateTrie {
func makeTestStateTrie() (*Database, *StateTrie, map[string][]byte) {
// Create an empty trie
triedb := NewDatabase(memorydb.New())
trie, _ := NewStateTrie(common.Hash{}, common.Hash{}, triedb)
trie, _ := NewStateTrie(TrieID(common.Hash{}), triedb)
// Fill it with some arbitrary data
content := make(map[string][]byte)
@ -66,7 +66,7 @@ func makeTestStateTrie() (*Database, *StateTrie, map[string][]byte) {
panic(fmt.Errorf("failed to commit db %v", err))
}
// Re-create the trie based on the new state
trie, _ = NewSecure(common.Hash{}, root, triedb)
trie, _ = NewStateTrie(TrieID(root), triedb)
return triedb, trie, content
}

12
trie/sync_test.go
View File

@ -30,7 +30,7 @@ import (
func makeTestTrie() (*Database, *StateTrie, map[string][]byte) {
// Create an empty trie
triedb := NewDatabase(memorydb.New())
trie, _ := NewStateTrie(common.Hash{}, common.Hash{}, triedb)
trie, _ := NewStateTrie(TrieID(common.Hash{}), triedb)
// Fill it with some arbitrary data
content := make(map[string][]byte)
@ -59,7 +59,7 @@ func makeTestTrie() (*Database, *StateTrie, map[string][]byte) {
panic(fmt.Errorf("failed to commit db %v", err))
}
// Re-create the trie based on the new state
trie, _ = NewSecure(common.Hash{}, root, triedb)
trie, _ = NewStateTrie(TrieID(root), triedb)
return triedb, trie, content
}
@ -67,7 +67,7 @@ func makeTestTrie() (*Database, *StateTrie, map[string][]byte) {
// content map.
func checkTrieContents(t *testing.T, db *Database, root []byte, content map[string][]byte) {
// Check root availability and trie contents
trie, err := NewStateTrie(common.Hash{}, common.BytesToHash(root), db)
trie, err := NewStateTrie(TrieID(common.BytesToHash(root)), db)
if err != nil {
t.Fatalf("failed to create trie at %x: %v", root, err)
}
@ -84,7 +84,7 @@ func checkTrieContents(t *testing.T, db *Database, root []byte, content map[stri
// checkTrieConsistency checks that all nodes in a trie are indeed present.
func checkTrieConsistency(db *Database, root common.Hash) error {
// Create and iterate a trie rooted in a subnode
trie, err := NewStateTrie(common.Hash{}, root, db)
trie, err := NewStateTrie(TrieID(root), db)
if err != nil {
return nil // Consider a non existent state consistent
}
@ -105,8 +105,8 @@ type trieElement struct {
func TestEmptySync(t *testing.T) {
dbA := NewDatabase(memorydb.New())
dbB := NewDatabase(memorydb.New())
emptyA := NewEmpty(dbA)
emptyB, _ := New(common.Hash{}, emptyRoot, dbB)
emptyA, _ := New(TrieID(common.Hash{}), dbA)
emptyB, _ := New(TrieID(emptyRoot), dbB)
for i, trie := range []*Trie{emptyA, emptyB} {
sync := NewSync(trie.Hash(), memorydb.New(), nil)

79
trie/trie.go
View File

@ -67,9 +67,8 @@ type Trie struct {
// actually unhashed nodes.
unhashed int
// db is the handler trie can retrieve nodes from. It's
// only for reading purpose and not available for writing.
db *Database
// reader is the handler trie can retrieve nodes from.
reader *trieReader
// tracer is the tool to track the trie changes.
// It will be reset after each commit operation.
@ -87,26 +86,29 @@ func (t *Trie) Copy() *Trie {
root: t.root,
owner: t.owner,
unhashed: t.unhashed,
db: t.db,
reader: t.reader,
tracer: t.tracer.copy(),
}
}
// New creates a trie with an existing root node from db and an assigned
// owner for storage proximity.
//
// If root is the zero hash or the sha3 hash of an empty string, the
// trie is initially empty and does not require a database. Otherwise,
// New will panic if db is nil and returns a MissingNodeError if root does
// not exist in the database. Accessing the trie loads nodes from db on demand.
func New(owner common.Hash, root common.Hash, db *Database) (*Trie, error) {
// New creates the trie instance with provided trie id and the read-only
// database. The state specified by trie id must be available, otherwise
// an error will be returned. The trie root specified by trie id can be
// zero hash or the sha3 hash of an empty string, then trie is initially
// empty, otherwise, the root node must be present in database or returns
// a MissingNodeError if not.
func New(id *ID, db NodeReader) (*Trie, error) {
reader, err := newTrieReader(id.StateRoot, id.Owner, db)
if err != nil {
return nil, err
}
trie := &Trie{
owner: owner,
db: db,
owner: id.Owner,
reader: reader,
//tracer: newTracer(),
}
if root != (common.Hash{}) && root != emptyRoot {
rootnode, err := trie.resolveHash(root[:], nil)
if id.Root != (common.Hash{}) && id.Root != emptyRoot {
rootnode, err := trie.resolveAndTrack(id.Root[:], nil)
if err != nil {
return nil, err
}
@ -117,7 +119,7 @@ func New(owner common.Hash, root common.Hash, db *Database) (*Trie, error) {
// NewEmpty is a shortcut to create empty tree. It's mostly used in tests.
func NewEmpty(db *Database) *Trie {
tr, _ := New(common.Hash{}, common.Hash{}, db)
tr, _ := New(TrieID(common.Hash{}), db)
return tr
}
@ -173,7 +175,7 @@ func (t *Trie) tryGet(origNode node, key []byte, pos int) (value []byte, newnode
}
return value, n, didResolve, err
case hashNode:
child, err := t.resolveHash(n, key[:pos])
child, err := t.resolveAndTrack(n, key[:pos])
if err != nil {
return nil, n, true, err
}
@ -219,7 +221,7 @@ func (t *Trie) tryGetNode(origNode node, path []byte, pos int) (item []byte, new
if hash == nil {
return nil, origNode, 0, errors.New("non-consensus node")
}
blob, err := t.db.Node(common.BytesToHash(hash))
blob, err := t.reader.nodeBlob(path, common.BytesToHash(hash))
return blob, origNode, 1, err
}
// Path still needs to be traversed, descend into children
@ -249,7 +251,7 @@ func (t *Trie) tryGetNode(origNode node, path []byte, pos int) (item []byte, new
return item, n, resolved, err
case hashNode:
child, err := t.resolveHash(n, path[:pos])
child, err := t.resolveAndTrack(n, path[:pos])
if err != nil {
return nil, n, 1, err
}
@ -370,7 +372,7 @@ func (t *Trie) insert(n node, prefix, key []byte, value node) (bool, node, error
// We've hit a part of the trie that isn't loaded yet. Load
// the node and insert into it. This leaves all child nodes on
// the path to the value in the trie.
rn, err := t.resolveHash(n, prefix)
rn, err := t.resolveAndTrack(n, prefix)
if err != nil {
return false, nil, err
}
@ -524,7 +526,7 @@ func (t *Trie) delete(n node, prefix, key []byte) (bool, node, error) {
// We've hit a part of the trie that isn't loaded yet. Load
// the node and delete from it. This leaves all child nodes on
// the path to the value in the trie.
rn, err := t.resolveHash(n, prefix)
rn, err := t.resolveAndTrack(n, prefix)
if err != nil {
return false, nil, err
}
@ -548,30 +550,22 @@ func concat(s1 []byte, s2 ...byte) []byte {
func (t *Trie) resolve(n node, prefix []byte) (node, error) {
if n, ok := n.(hashNode); ok {
return t.resolveHash(n, prefix)
return t.resolveAndTrack(n, prefix)
}
return n, nil
}
// resolveHash loads node from the underlying database with the provided
// node hash and path prefix.
func (t *Trie) resolveHash(n hashNode, prefix []byte) (node, error) {
hash := common.BytesToHash(n)
if node := t.db.node(hash); node != nil {
return node, nil
// resolveAndTrack loads node from the underlying store with the given node hash
// and path prefix and also tracks the loaded node blob in tracer treated as the
// node's original value. The rlp-encoded blob is preferred to be loaded from
// database because it's easy to decode node while complex to encode node to blob.
func (t *Trie) resolveAndTrack(n hashNode, prefix []byte) (node, error) {
blob, err := t.reader.nodeBlob(prefix, common.BytesToHash(n))
if err != nil {
return nil, err
}
return nil, &MissingNodeError{Owner: t.owner, NodeHash: hash, Path: prefix}
}
// resolveHash loads rlp-encoded node blob from the underlying database
// with the provided node hash and path prefix.
func (t *Trie) resolveBlob(n hashNode, prefix []byte) ([]byte, error) {
hash := common.BytesToHash(n)
blob, _ := t.db.Node(hash)
if len(blob) != 0 {
return blob, nil
}
return nil, &MissingNodeError{Owner: t.owner, NodeHash: hash, Path: prefix}
t.tracer.onRead(prefix, blob)
return mustDecodeNode(n, blob), nil
}
// Hash returns the root hash of the trie. It does not write to the
@ -606,7 +600,7 @@ func (t *Trie) Commit(collectLeaf bool) (common.Hash, *NodeSet, error) {
t.root = hashedNode
return rootHash, nil, nil
}
h := newCommitter(t.owner, collectLeaf)
h := newCommitter(t.owner, t.tracer, collectLeaf)
newRoot, nodes, err := h.Commit(t.root)
if err != nil {
return common.Hash{}, nil, err
@ -633,6 +627,5 @@ func (t *Trie) Reset() {
t.root = nil
t.owner = common.Hash{}
t.unhashed = 0
//t.db = nil
t.tracer.reset()
}

55
trie/trie_id.go Normal file
View File

@ -0,0 +1,55 @@
// Copyright 2022 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>
package trie
import "github.com/ethereum/go-ethereum/common"
// ID is the identifier for uniquely identifying a trie.
type ID struct {
StateRoot common.Hash // The root of the corresponding state(block.root)
Owner common.Hash // The contract address hash which the trie belongs to
Root common.Hash // The root hash of trie
}
// StateTrieID constructs an identifier for state trie with the provided state root.
func StateTrieID(root common.Hash) *ID {
return &ID{
StateRoot: root,
Owner: common.Hash{},
Root: root,
}
}
// StorageTrieID constructs an identifier for storage trie which belongs to a certain
// state and contract specified by the stateRoot and owner.
func StorageTrieID(stateRoot common.Hash, owner common.Hash, root common.Hash) *ID {
return &ID{
StateRoot: stateRoot,
Owner: owner,
Root: root,
}
}
// TrieID constructs an identifier for a standard trie(not a second-layer trie)
// with provided root. It's mostly used in tests and some other tries like CHT trie.
func TrieID(root common.Hash) *ID {
return &ID{
StateRoot: root,
Owner: common.Hash{},
Root: root,
}
}

106
trie/trie_reader.go Normal file
View File

@ -0,0 +1,106 @@
// Copyright 2022 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package trie
import (
"fmt"
"github.com/ethereum/go-ethereum/common"
)
// Reader wraps the Node and NodeBlob method of a backing trie store.
type Reader interface {
// Node retrieves the trie node with the provided trie identifier, hexary
// node path and the corresponding node hash.
// No error will be returned if the node is not found.
Node(owner common.Hash, path []byte, hash common.Hash) (node, error)
// NodeBlob retrieves the RLP-encoded trie node blob with the provided trie
// identifier, hexary node path and the corresponding node hash.
// No error will be returned if the node is not found.
NodeBlob(owner common.Hash, path []byte, hash common.Hash) ([]byte, error)
}
// NodeReader wraps all the necessary functions for accessing trie node.
type NodeReader interface {
// GetReader returns a reader for accessing all trie nodes with provided
// state root. Nil is returned in case the state is not available.
GetReader(root common.Hash) Reader
}
// trieReader is a wrapper of the underlying node reader. It's not safe
// for concurrent usage.
type trieReader struct {
owner common.Hash
reader Reader
banned map[string]struct{} // Marker to prevent node from being accessed, for tests
}
// newTrieReader initializes the trie reader with the given node reader.
func newTrieReader(stateRoot, owner common.Hash, db NodeReader) (*trieReader, error) {
reader := db.GetReader(stateRoot)
if reader == nil {
return nil, fmt.Errorf("state not found #%x", stateRoot)
}
return &trieReader{owner: owner, reader: reader}, nil
}
// newEmptyReader initializes the pure in-memory reader. All read operations
// should be forbidden and returns the MissingNodeError.
func newEmptyReader() *trieReader {
return &trieReader{}
}
// node retrieves the trie node with the provided trie node information.
// An MissingNodeError will be returned in case the node is not found or
// any error is encountered.
func (r *trieReader) node(path []byte, hash common.Hash) (node, error) {
// Perform the logics in tests for preventing trie node access.
if r.banned != nil {
if _, ok := r.banned[string(path)]; ok {
return nil, &MissingNodeError{Owner: r.owner, NodeHash: hash, Path: path}
}
}
if r.reader == nil {
return nil, &MissingNodeError{Owner: r.owner, NodeHash: hash, Path: path}
}
node, err := r.reader.Node(r.owner, path, hash)
if err != nil || node == nil {
return nil, &MissingNodeError{Owner: r.owner, NodeHash: hash, Path: path, err: err}
}
return node, nil
}
// node retrieves the rlp-encoded trie node with the provided trie node
// information. An MissingNodeError will be returned in case the node is
// not found or any error is encountered.
func (r *trieReader) nodeBlob(path []byte, hash common.Hash) ([]byte, error) {
// Perform the logics in tests for preventing trie node access.
if r.banned != nil {
if _, ok := r.banned[string(path)]; ok {
return nil, &MissingNodeError{Owner: r.owner, NodeHash: hash, Path: path}
}
}
if r.reader == nil {
return nil, &MissingNodeError{Owner: r.owner, NodeHash: hash, Path: path}
}
blob, err := r.reader.NodeBlob(r.owner, path, hash)
if err != nil || len(blob) == 0 {
return nil, &MissingNodeError{Owner: r.owner, NodeHash: hash, Path: path, err: err}
}
return blob, nil
}

72
trie/trie_test.go
View File

@ -64,7 +64,8 @@ func TestNull(t *testing.T) {
}
func TestMissingRoot(t *testing.T) {
trie, err := New(common.Hash{}, common.HexToHash("0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33"), NewDatabase(memorydb.New()))
root := common.HexToHash("0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33")
trie, err := New(TrieID(root), NewDatabase(memorydb.New()))
if trie != nil {
t.Error("New returned non-nil trie for invalid root")
}
@ -89,27 +90,27 @@ func testMissingNode(t *testing.T, memonly bool) {
triedb.Commit(root, true, nil)
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
_, err := trie.TryGet([]byte("120000"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
_, err = trie.TryGet([]byte("120099"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
_, err = trie.TryGet([]byte("123456"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
err = trie.TryUpdate([]byte("120099"), []byte("zxcvzxcvzxcvzxcvzxcvzxcvzxcvzxcv"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
err = trie.TryDelete([]byte("123456"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
@ -122,27 +123,27 @@ func testMissingNode(t *testing.T, memonly bool) {
diskdb.Delete(hash[:])
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
_, err = trie.TryGet([]byte("120000"))
if _, ok := err.(*MissingNodeError); !ok {
t.Errorf("Wrong error: %v", err)
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
_, err = trie.TryGet([]byte("120099"))
if _, ok := err.(*MissingNodeError); !ok {
t.Errorf("Wrong error: %v", err)
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
_, err = trie.TryGet([]byte("123456"))
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
err = trie.TryUpdate([]byte("120099"), []byte("zxcv"))
if _, ok := err.(*MissingNodeError); !ok {
t.Errorf("Wrong error: %v", err)
}
trie, _ = New(common.Hash{}, root, triedb)
trie, _ = New(TrieID(root), triedb)
err = trie.TryDelete([]byte("123456"))
if _, ok := err.(*MissingNodeError); !ok {
t.Errorf("Wrong error: %v", err)
@ -196,7 +197,7 @@ func TestGet(t *testing.T) {
}
root, nodes, _ := trie.Commit(false)
db.Update(NewWithNodeSet(nodes))
trie, _ = New(common.Hash{}, root, db)
trie, _ = New(TrieID(root), db)
}
}
@ -273,7 +274,7 @@ func TestReplication(t *testing.T) {
triedb.Update(NewWithNodeSet(nodes))
// create a new trie on top of the database and check that lookups work.
trie2, err := New(common.Hash{}, exp, triedb)
trie2, err := New(TrieID(exp), triedb)
if err != nil {
t.Fatalf("can't recreate trie at %x: %v", exp, err)
}
@ -294,7 +295,7 @@ func TestReplication(t *testing.T) {
if nodes != nil {
triedb.Update(NewWithNodeSet(nodes))
}
trie2, err = New(common.Hash{}, hash, triedb)
trie2, err = New(TrieID(hash), triedb)
if err != nil {
t.Fatalf("can't recreate trie at %x: %v", exp, err)
}
@ -377,6 +378,7 @@ const (
opCommit
opItercheckhash
opNodeDiff
opProve
opMax // boundary value, not an actual op
)
@ -402,7 +404,7 @@ func (randTest) Generate(r *rand.Rand, size int) reflect.Value {
step.key = genKey()
step.value = make([]byte, 8)
binary.BigEndian.PutUint64(step.value, uint64(i))
case opGet, opDelete:
case opGet, opDelete, opProve:
step.key = genKey()
}
steps = append(steps, step)
@ -436,24 +438,60 @@ func runRandTest(rt randTest) bool {
if string(v) != want {
rt[i].err = fmt.Errorf("mismatch for key %#x, got %#x want %#x", step.key, v, want)
}
case opProve:
hash := tr.Hash()
if hash == emptyRoot {
continue
}
proofDb := rawdb.NewMemoryDatabase()
err := tr.Prove(step.key, 0, proofDb)
if err != nil {
rt[i].err = fmt.Errorf("failed for proving key %#x, %v", step.key, err)
}
_, err = VerifyProof(hash, step.key, proofDb)
if err != nil {
rt[i].err = fmt.Errorf("failed for verifying key %#x, %v", step.key, err)
}
case opHash:
tr.Hash()
case opCommit:
hash, nodes, err := tr.Commit(false)
root, nodes, err := tr.Commit(true)
if err != nil {
rt[i].err = err
return false
}
// Validity the returned nodeset
if nodes != nil {
for path, node := range nodes.updates.nodes {
blob, _, _ := origTrie.TryGetNode(hexToCompact([]byte(path)))
got := node.prev
if !bytes.Equal(blob, got) {
rt[i].err = fmt.Errorf("prevalue mismatch for 0x%x, got 0x%x want 0x%x", path, got, blob)
panic(rt[i].err)
}
}
for path, prev := range nodes.deletes {
blob, _, _ := origTrie.TryGetNode(hexToCompact([]byte(path)))
if !bytes.Equal(blob, prev) {
rt[i].err = fmt.Errorf("prevalue mismatch for 0x%x, got 0x%x want 0x%x", path, prev, blob)
return false
}
}
}
if nodes != nil {
triedb.Update(NewWithNodeSet(nodes))
}
newtr, err := New(common.Hash{}, hash, triedb)
newtr, err := New(TrieID(root), triedb)
if err != nil {
rt[i].err = err
return false
}
tr = newtr
// Enable node tracing. Resolve the root node again explicitly
// since it's not captured at the beginning.
tr.tracer = newTracer()
tr.resolveAndTrack(root.Bytes(), nil)
origTrie = tr.Copy()
case opItercheckhash:

120
trie/util_test.go
View File

@ -17,6 +17,7 @@
package trie
import (
"bytes"
"testing"
"github.com/ethereum/go-ethereum/common"
@ -72,7 +73,7 @@ func TestTrieTracer(t *testing.T) {
if err := db.Update(NewWithNodeSet(nodes)); err != nil {
t.Fatal(err)
}
trie, _ = New(common.Hash{}, root, db)
trie, _ = New(TrieID(root), db)
trie.tracer = newTracer()
// Delete all the elements, check deletion set
@ -124,3 +125,120 @@ func TestTrieTracerNoop(t *testing.T) {
t.Fatalf("Unexpected deleted node tracked %d", len(trie.tracer.deleteList()))
}
}
func TestTrieTracePrevValue(t *testing.T) {
db := NewDatabase(rawdb.NewMemoryDatabase())
trie := NewEmpty(db)
trie.tracer = newTracer()
paths, blobs := trie.tracer.prevList()
if len(paths) != 0 || len(blobs) != 0 {
t.Fatalf("Nothing should be tracked")
}
// Insert a batch of entries, all the nodes should be marked as inserted
vals := []struct{ k, v string }{
{"do", "verb"},
{"ether", "wookiedoo"},
{"horse", "stallion"},
{"shaman", "horse"},
{"doge", "coin"},
{"dog", "puppy"},
{"somethingveryoddindeedthis is", "myothernodedata"},
}
for _, val := range vals {
trie.Update([]byte(val.k), []byte(val.v))
}
paths, blobs = trie.tracer.prevList()
if len(paths) != 0 || len(blobs) != 0 {
t.Fatalf("Nothing should be tracked")
}
// Commit the changes and re-create with new root
root, nodes, _ := trie.Commit(false)
if err := db.Update(NewWithNodeSet(nodes)); err != nil {
t.Fatal(err)
}
trie, _ = New(TrieID(root), db)
trie.tracer = newTracer()
trie.resolveAndTrack(root.Bytes(), nil)
// Load all nodes in trie
for _, val := range vals {
trie.TryGet([]byte(val.k))
}
// Ensure all nodes are tracked by tracer with correct prev-values
iter := trie.NodeIterator(nil)
seen := make(map[string][]byte)
for iter.Next(true) {
// Embedded nodes are ignored since they are not present in
// database.
if iter.Hash() == (common.Hash{}) {
continue
}
seen[string(iter.Path())] = common.CopyBytes(iter.NodeBlob())
}
paths, blobs = trie.tracer.prevList()
if len(paths) != len(seen) || len(blobs) != len(seen) {
t.Fatalf("Unexpected tracked values")
}
for i, path := range paths {
blob := blobs[i]
prev, ok := seen[string(path)]
if !ok {
t.Fatalf("Missing node %v", path)
}
if !bytes.Equal(blob, prev) {
t.Fatalf("Unexpected value path: %v, want: %v, got: %v", path, prev, blob)
}
}
// Re-open the trie and iterate the trie, ensure nothing will be tracked.
// Iterator will not link any loaded nodes to trie.
trie, _ = New(TrieID(root), db)
trie.tracer = newTracer()
iter = trie.NodeIterator(nil)
for iter.Next(true) {
}
paths, blobs = trie.tracer.prevList()
if len(paths) != 0 || len(blobs) != 0 {
t.Fatalf("Nothing should be tracked")
}
// Re-open the trie and generate proof for entries, ensure nothing will
// be tracked. Prover will not link any loaded nodes to trie.
trie, _ = New(TrieID(root), db)
trie.tracer = newTracer()
for _, val := range vals {
trie.Prove([]byte(val.k), 0, rawdb.NewMemoryDatabase())
}
paths, blobs = trie.tracer.prevList()
if len(paths) != 0 || len(blobs) != 0 {
t.Fatalf("Nothing should be tracked")
}
// Delete entries from trie, ensure all previous values are correct.
trie, _ = New(TrieID(root), db)
trie.tracer = newTracer()
trie.resolveAndTrack(root.Bytes(), nil)
for _, val := range vals {
trie.TryDelete([]byte(val.k))
}
paths, blobs = trie.tracer.prevList()
if len(paths) != len(seen) || len(blobs) != len(seen) {
t.Fatalf("Unexpected tracked values")
}
for i, path := range paths {
blob := blobs[i]
prev, ok := seen[string(path)]
if !ok {
t.Fatalf("Missing node %v", path)
}
if !bytes.Equal(blob, prev) {
t.Fatalf("Unexpected value path: %v, want: %v, got: %v", path, prev, blob)
}
}
}

55
trie/utils.go
View File

@ -50,45 +50,43 @@ func newTracer() *tracer {
}
}
/*
// onRead tracks the newly loaded trie node and caches the rlp-encoded blob internally.
// Don't change the value outside of function since it's not deep-copied.
func (t *tracer) onRead(key []byte, val []byte) {
func (t *tracer) onRead(path []byte, val []byte) {
// Tracer isn't used right now, remove this check later.
if t == nil {
return
}
t.origin[string(key)] = val
t.origin[string(path)] = val
}
*/
// onInsert tracks the newly inserted trie node. If it's already in the deletion set
// (resurrected node), then just wipe it from the deletion set as the "untouched".
func (t *tracer) onInsert(key []byte) {
func (t *tracer) onInsert(path []byte) {
// Tracer isn't used right now, remove this check later.
if t == nil {
return
}
if _, present := t.delete[string(key)]; present {
delete(t.delete, string(key))
if _, present := t.delete[string(path)]; present {
delete(t.delete, string(path))
return
}
t.insert[string(key)] = struct{}{}
t.insert[string(path)] = struct{}{}
}
// onDelete tracks the newly deleted trie node. If it's already
// in the addition set, then just wipe it from the addition set
// as it's untouched.
func (t *tracer) onDelete(key []byte) {
func (t *tracer) onDelete(path []byte) {
// Tracer isn't used right now, remove this check later.
if t == nil {
return
}
if _, present := t.insert[string(key)]; present {
delete(t.insert, string(key))
if _, present := t.insert[string(path)]; present {
delete(t.insert, string(path))
return
}
t.delete[string(key)] = struct{}{}
t.delete[string(path)] = struct{}{}
}
// insertList returns the tracked inserted trie nodes in list format.
@ -98,8 +96,8 @@ func (t *tracer) insertList() [][]byte {
return nil
}
var ret [][]byte
for key := range t.insert {
ret = append(ret, []byte(key))
for path := range t.insert {
ret = append(ret, []byte(path))
}
return ret
}
@ -111,22 +109,37 @@ func (t *tracer) deleteList() [][]byte {
return nil
}
var ret [][]byte
for key := range t.delete {
ret = append(ret, []byte(key))
for path := range t.delete {
ret = append(ret, []byte(path))
}
return ret
}
/*
// prevList returns the tracked node blobs in list format.
func (t *tracer) prevList() ([][]byte, [][]byte) {
// Tracer isn't used right now, remove this check later.
if t == nil {
return nil, nil
}
var (
paths [][]byte
blobs [][]byte
)
for path, blob := range t.origin {
paths = append(paths, []byte(path))
blobs = append(blobs, blob)
}
return paths, blobs
}
// getPrev returns the cached original value of the specified node.
func (t *tracer) getPrev(key []byte) []byte {
// Don't panic on uninitialized tracer, it's possible in testing.
func (t *tracer) getPrev(path []byte) []byte {
// Tracer isn't used right now, remove this check later.
if t == nil {
return nil
}
return t.origin[string(key)]
return t.origin[string(path)]
}
*/
// reset clears the content tracked by tracer.
func (t *tracer) reset() {