From d235e2c6a5788ec4a6cff15a16f56b38a3876a0d Mon Sep 17 00:00:00 2001 From: Determinant Date: Sun, 28 Jun 2020 14:47:41 -0400 Subject: ... --- core/state/statedb.go | 793 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 793 insertions(+) create mode 100644 core/state/statedb.go (limited to 'core/state/statedb.go') diff --git a/core/state/statedb.go b/core/state/statedb.go new file mode 100644 index 0000000..12deebe --- /dev/null +++ b/core/state/statedb.go @@ -0,0 +1,793 @@ +// Copyright 2014 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 . + +// Package state provides a caching layer atop the Ethereum state trie. +package state + +import ( + "errors" + "fmt" + "math/big" + "sort" + "time" + + "github.com/ava-labs/coreth/core/types" + "github.com/ava-labs/go-ethereum/common" + "github.com/ava-labs/go-ethereum/crypto" + "github.com/ava-labs/go-ethereum/log" + "github.com/ava-labs/go-ethereum/metrics" + "github.com/ava-labs/go-ethereum/rlp" + "github.com/ava-labs/go-ethereum/trie" +) + +type revision struct { + id int + journalIndex int +} + +var ( + // emptyRoot is the known root hash of an empty trie. + emptyRoot = common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421") + + // emptyCode is the known hash of the empty EVM bytecode. + emptyCode = crypto.Keccak256Hash(nil) +) + +type proofList [][]byte + +func (n *proofList) Put(key []byte, value []byte) error { + *n = append(*n, value) + return nil +} + +func (n *proofList) Delete(key []byte) error { + panic("not supported") +} + +// StateDBs within the ethereum protocol are used to store anything +// within the merkle trie. StateDBs take care of caching and storing +// nested states. It's the general query interface to retrieve: +// * Contracts +// * Accounts +type StateDB struct { + db Database + trie Trie + + // This map holds 'live' objects, which will get modified while processing a state transition. + stateObjects map[common.Address]*stateObject + stateObjectsDirty map[common.Address]struct{} + + // DB error. + // State objects are used by the consensus core and VM which are + // unable to deal with database-level errors. Any error that occurs + // during a database read is memoized here and will eventually be returned + // by StateDB.Commit. + dbErr error + + // The refund counter, also used by state transitioning. + refund uint64 + + thash, bhash common.Hash + txIndex int + logs map[common.Hash][]*types.Log + logSize uint + + preimages map[common.Hash][]byte + + // Journal of state modifications. This is the backbone of + // Snapshot and RevertToSnapshot. + journal *journal + validRevisions []revision + nextRevisionId int + + // Measurements gathered during execution for debugging purposes + AccountReads time.Duration + AccountHashes time.Duration + AccountUpdates time.Duration + AccountCommits time.Duration + StorageReads time.Duration + StorageHashes time.Duration + StorageUpdates time.Duration + StorageCommits time.Duration +} + +// Create a new state from a given trie. +func New(root common.Hash, db Database) (*StateDB, error) { + tr, err := db.OpenTrie(root) + if err != nil { + return nil, err + } + return &StateDB{ + db: db, + trie: tr, + stateObjects: make(map[common.Address]*stateObject), + stateObjectsDirty: make(map[common.Address]struct{}), + logs: make(map[common.Hash][]*types.Log), + preimages: make(map[common.Hash][]byte), + journal: newJournal(), + }, nil +} + +// setError remembers the first non-nil error it is called with. +func (self *StateDB) setError(err error) { + if self.dbErr == nil { + self.dbErr = err + } +} + +func (self *StateDB) Error() error { + return self.dbErr +} + +// Reset clears out all ephemeral state objects from the state db, but keeps +// the underlying state trie to avoid reloading data for the next operations. +func (self *StateDB) Reset(root common.Hash) error { + tr, err := self.db.OpenTrie(root) + if err != nil { + return err + } + self.trie = tr + self.stateObjects = make(map[common.Address]*stateObject) + self.stateObjectsDirty = make(map[common.Address]struct{}) + self.thash = common.Hash{} + self.bhash = common.Hash{} + self.txIndex = 0 + self.logs = make(map[common.Hash][]*types.Log) + self.logSize = 0 + self.preimages = make(map[common.Hash][]byte) + self.clearJournalAndRefund() + return nil +} + +func (self *StateDB) AddLog(log *types.Log) { + self.journal.append(addLogChange{txhash: self.thash}) + + log.TxHash = self.thash + log.BlockHash = self.bhash + log.TxIndex = uint(self.txIndex) + log.Index = self.logSize + self.logs[self.thash] = append(self.logs[self.thash], log) + self.logSize++ +} + +func (self *StateDB) GetLogs(hash common.Hash) []*types.Log { + return self.logs[hash] +} + +func (self *StateDB) Logs() []*types.Log { + var logs []*types.Log + for _, lgs := range self.logs { + logs = append(logs, lgs...) + } + return logs +} + +// AddPreimage records a SHA3 preimage seen by the VM. +func (self *StateDB) AddPreimage(hash common.Hash, preimage []byte) { + if _, ok := self.preimages[hash]; !ok { + self.journal.append(addPreimageChange{hash: hash}) + pi := make([]byte, len(preimage)) + copy(pi, preimage) + self.preimages[hash] = pi + } +} + +// Preimages returns a list of SHA3 preimages that have been submitted. +func (self *StateDB) Preimages() map[common.Hash][]byte { + return self.preimages +} + +// AddRefund adds gas to the refund counter +func (self *StateDB) AddRefund(gas uint64) { + self.journal.append(refundChange{prev: self.refund}) + self.refund += gas +} + +// SubRefund removes gas from the refund counter. +// This method will panic if the refund counter goes below zero +func (self *StateDB) SubRefund(gas uint64) { + self.journal.append(refundChange{prev: self.refund}) + if gas > self.refund { + panic("Refund counter below zero") + } + self.refund -= gas +} + +// Exist reports whether the given account address exists in the state. +// Notably this also returns true for suicided accounts. +func (self *StateDB) Exist(addr common.Address) bool { + return self.getStateObject(addr) != nil +} + +// Empty returns whether the state object is either non-existent +// or empty according to the EIP161 specification (balance = nonce = code = 0) +func (self *StateDB) Empty(addr common.Address) bool { + so := self.getStateObject(addr) + return so == nil || so.empty() +} + +// Retrieve the balance from the given address or 0 if object not found +func (self *StateDB) GetBalance(addr common.Address) *big.Int { + stateObject := self.getStateObject(addr) + if stateObject != nil { + return stateObject.Balance() + } + return common.Big0 +} + +// Retrieve the balance from the given address or 0 if object not found +func (self *StateDB) GetBalanceMultiCoin(addr common.Address, coinID common.Hash) *big.Int { + stateObject := self.getStateObject(addr) + if stateObject != nil { + return stateObject.BalanceMultiCoin(coinID, self.db) + } + return common.Big0 +} + +func (self *StateDB) EnableMultiCoin(addr common.Address) error { + stateObject := self.GetOrNewStateObject(addr) + if stateObject.data.Root != emptyRoot { + return errors.New("not a fresh account") + } + if !stateObject.EnableMultiCoin() { + return errors.New("multi-coin mode already enabled") + } + return nil +} + +func (self *StateDB) IsMultiCoin(addr common.Address) bool { + stateObject := self.getStateObject(addr) + if stateObject != nil { + return stateObject.IsMultiCoin() + } + return false +} + +func (self *StateDB) GetNonce(addr common.Address) uint64 { + stateObject := self.getStateObject(addr) + if stateObject != nil { + return stateObject.Nonce() + } + + return 0 +} + +// TxIndex returns the current transaction index set by Prepare. +func (self *StateDB) TxIndex() int { + return self.txIndex +} + +// BlockHash returns the current block hash set by Prepare. +func (self *StateDB) BlockHash() common.Hash { + return self.bhash +} + +func (self *StateDB) GetCode(addr common.Address) []byte { + stateObject := self.getStateObject(addr) + if stateObject != nil { + return stateObject.Code(self.db) + } + return nil +} + +func (self *StateDB) GetCodeSize(addr common.Address) int { + stateObject := self.getStateObject(addr) + if stateObject == nil { + return 0 + } + if stateObject.code != nil { + return len(stateObject.code) + } + size, err := self.db.ContractCodeSize(stateObject.addrHash, common.BytesToHash(stateObject.CodeHash())) + if err != nil { + self.setError(err) + } + return size +} + +func (self *StateDB) GetCodeHash(addr common.Address) common.Hash { + stateObject := self.getStateObject(addr) + if stateObject == nil { + return common.Hash{} + } + return common.BytesToHash(stateObject.CodeHash()) +} + +// GetState retrieves a value from the given account's storage trie. +func (self *StateDB) GetState(addr common.Address, hash common.Hash) common.Hash { + stateObject := self.getStateObject(addr) + if stateObject != nil { + return stateObject.GetState(self.db, hash) + } + return common.Hash{} +} + +// GetProof returns the MerkleProof for a given Account +func (self *StateDB) GetProof(a common.Address) ([][]byte, error) { + var proof proofList + err := self.trie.Prove(crypto.Keccak256(a.Bytes()), 0, &proof) + return [][]byte(proof), err +} + +// GetProof returns the StorageProof for given key +func (self *StateDB) GetStorageProof(a common.Address, key common.Hash) ([][]byte, error) { + var proof proofList + trie := self.StorageTrie(a) + if trie == nil { + return proof, errors.New("storage trie for requested address does not exist") + } + err := trie.Prove(crypto.Keccak256(key.Bytes()), 0, &proof) + return [][]byte(proof), err +} + +// GetCommittedState retrieves a value from the given account's committed storage trie. +func (self *StateDB) GetCommittedState(addr common.Address, hash common.Hash) common.Hash { + stateObject := self.getStateObject(addr) + if stateObject != nil { + return stateObject.GetCommittedState(self.db, hash) + } + return common.Hash{} +} + +// Database retrieves the low level database supporting the lower level trie ops. +func (self *StateDB) Database() Database { + return self.db +} + +// StorageTrie returns the storage trie of an account. +// The return value is a copy and is nil for non-existent accounts. +func (self *StateDB) StorageTrie(addr common.Address) Trie { + stateObject := self.getStateObject(addr) + if stateObject == nil { + return nil + } + cpy := stateObject.deepCopy(self) + return cpy.updateTrie(self.db) +} + +func (self *StateDB) HasSuicided(addr common.Address) bool { + stateObject := self.getStateObject(addr) + if stateObject != nil { + return stateObject.suicided + } + return false +} + +/* + * SETTERS + */ + +// AddBalance adds amount to the account associated with addr. +func (self *StateDB) AddBalance(addr common.Address, amount *big.Int) { + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + stateObject.AddBalance(amount) + } +} + +// SubBalance subtracts amount from the account associated with addr. +func (self *StateDB) SubBalance(addr common.Address, amount *big.Int) { + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + stateObject.SubBalance(amount) + } +} + +func (self *StateDB) SetBalance(addr common.Address, amount *big.Int) { + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + stateObject.SetBalance(amount) + } +} + +// AddBalance adds amount to the account associated with addr. +func (self *StateDB) AddBalanceMultiCoin(addr common.Address, coinID common.Hash, amount *big.Int) { + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + stateObject.AddBalanceMultiCoin(coinID, amount, self.db) + } +} + +// SubBalance subtracts amount from the account associated with addr. +func (self *StateDB) SubBalanceMultiCoin(addr common.Address, coinID common.Hash, amount *big.Int) { + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + stateObject.SubBalanceMultiCoin(coinID, amount, self.db) + } +} + +func (self *StateDB) SetBalanceMultiCoin(addr common.Address, coinID common.Hash, amount *big.Int) { + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + stateObject.SetBalanceMultiCoin(coinID, amount, self.db) + } +} + +func (self *StateDB) SetNonce(addr common.Address, nonce uint64) { + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + stateObject.SetNonce(nonce) + } +} + +func (self *StateDB) SetCode(addr common.Address, code []byte) { + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + stateObject.SetCode(crypto.Keccak256Hash(code), code) + } +} + +func (self *StateDB) SetState(addr common.Address, key, value common.Hash) (res error) { + res = nil + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + if stateObject.data.IsMultiCoin { + NormalizeStateKey(&key) + } + stateObject.SetState(self.db, key, value) + } + return +} + +// SetStorage replaces the entire storage for the specified account with given +// storage. This function should only be used for debugging. +func (self *StateDB) SetStorage(addr common.Address, storage map[common.Hash]common.Hash) { + stateObject := self.GetOrNewStateObject(addr) + if stateObject != nil { + stateObject.SetStorage(storage) + } +} + +// Suicide marks the given account as suicided. +// This clears the account balance. +// +// The account's state object is still available until the state is committed, +// getStateObject will return a non-nil account after Suicide. +func (self *StateDB) Suicide(addr common.Address) bool { + stateObject := self.getStateObject(addr) + if stateObject == nil { + return false + } + self.journal.append(suicideChange{ + account: &addr, + prev: stateObject.suicided, + prevbalance: new(big.Int).Set(stateObject.Balance()), + }) + stateObject.markSuicided() + stateObject.data.Balance = new(big.Int) + + return true +} + +// +// Setting, updating & deleting state object methods. +// + +// updateStateObject writes the given object to the trie. +func (s *StateDB) updateStateObject(stateObject *stateObject) { + // Track the amount of time wasted on updating the account from the trie + if metrics.EnabledExpensive { + defer func(start time.Time) { s.AccountUpdates += time.Since(start) }(time.Now()) + } + // Encode the account and update the account trie + addr := stateObject.Address() + + data, err := rlp.EncodeToBytes(stateObject) + if err != nil { + panic(fmt.Errorf("can't encode object at %x: %v", addr[:], err)) + } + s.setError(s.trie.TryUpdate(addr[:], data)) +} + +// deleteStateObject removes the given object from the state trie. +func (s *StateDB) deleteStateObject(stateObject *stateObject) { + // Track the amount of time wasted on deleting the account from the trie + if metrics.EnabledExpensive { + defer func(start time.Time) { s.AccountUpdates += time.Since(start) }(time.Now()) + } + // Delete the account from the trie + stateObject.deleted = true + + addr := stateObject.Address() + s.setError(s.trie.TryDelete(addr[:])) +} + +// Retrieve a state object given by the address. Returns nil if not found. +func (s *StateDB) getStateObject(addr common.Address) (stateObject *stateObject) { + // Prefer live objects + if obj := s.stateObjects[addr]; obj != nil { + if obj.deleted { + return nil + } + return obj + } + // Track the amount of time wasted on loading the object from the database + if metrics.EnabledExpensive { + defer func(start time.Time) { s.AccountReads += time.Since(start) }(time.Now()) + } + // Load the object from the database + enc, err := s.trie.TryGet(addr[:]) + if len(enc) == 0 { + s.setError(err) + return nil + } + var data Account + if err := rlp.DecodeBytes(enc, &data); err != nil { + log.Error("Failed to decode state object", "addr", addr, "err", err) + return nil + } + // Insert into the live set + obj := newObject(s, addr, data) + s.setStateObject(obj) + return obj +} + +func (self *StateDB) setStateObject(object *stateObject) { + self.stateObjects[object.Address()] = object +} + +// Retrieve a state object or create a new state object if nil. +func (self *StateDB) GetOrNewStateObject(addr common.Address) *stateObject { + stateObject := self.getStateObject(addr) + if stateObject == nil || stateObject.deleted { + stateObject, _ = self.createObject(addr) + } + return stateObject +} + +// createObject creates a new state object. If there is an existing account with +// the given address, it is overwritten and returned as the second return value. +func (self *StateDB) createObject(addr common.Address) (newobj, prev *stateObject) { + prev = self.getStateObject(addr) + newobj = newObject(self, addr, Account{}) + newobj.setNonce(0) // sets the object to dirty + if prev == nil { + self.journal.append(createObjectChange{account: &addr}) + } else { + self.journal.append(resetObjectChange{prev: prev}) + } + self.setStateObject(newobj) + return newobj, prev +} + +// CreateAccount explicitly creates a state object. If a state object with the address +// already exists the balance is carried over to the new account. +// +// CreateAccount is called during the EVM CREATE operation. The situation might arise that +// a contract does the following: +// +// 1. sends funds to sha(account ++ (nonce + 1)) +// 2. tx_create(sha(account ++ nonce)) (note that this gets the address of 1) +// +// Carrying over the balance ensures that Ether doesn't disappear. +func (self *StateDB) CreateAccount(addr common.Address) { + newObj, prev := self.createObject(addr) + if prev != nil { + newObj.setBalance(prev.data.Balance) + } +} + +func (db *StateDB) ForEachStorage(addr common.Address, cb func(key, value common.Hash) bool) error { + so := db.getStateObject(addr) + if so == nil { + return nil + } + it := trie.NewIterator(so.getTrie(db.db).NodeIterator(nil)) + + for it.Next() { + key := common.BytesToHash(db.trie.GetKey(it.Key)) + if value, dirty := so.dirtyStorage[key]; dirty { + if !cb(key, value) { + return nil + } + continue + } + + if len(it.Value) > 0 { + _, content, _, err := rlp.Split(it.Value) + if err != nil { + return err + } + if !cb(key, common.BytesToHash(content)) { + return nil + } + } + } + return nil +} + +// Copy creates a deep, independent copy of the state. +// Snapshots of the copied state cannot be applied to the copy. +func (self *StateDB) Copy() *StateDB { + // Copy all the basic fields, initialize the memory ones + state := &StateDB{ + db: self.db, + trie: self.db.CopyTrie(self.trie), + stateObjects: make(map[common.Address]*stateObject, len(self.journal.dirties)), + stateObjectsDirty: make(map[common.Address]struct{}, len(self.journal.dirties)), + refund: self.refund, + logs: make(map[common.Hash][]*types.Log, len(self.logs)), + logSize: self.logSize, + preimages: make(map[common.Hash][]byte, len(self.preimages)), + journal: newJournal(), + } + // Copy the dirty states, logs, and preimages + for addr := range self.journal.dirties { + // As documented [here](https://github.com/ethereum/go-ethereum/pull/16485#issuecomment-380438527), + // and in the Finalise-method, there is a case where an object is in the journal but not + // in the stateObjects: OOG after touch on ripeMD prior to Byzantium. Thus, we need to check for + // nil + if object, exist := self.stateObjects[addr]; exist { + state.stateObjects[addr] = object.deepCopy(state) + state.stateObjectsDirty[addr] = struct{}{} + } + } + // Above, we don't copy the actual journal. This means that if the copy is copied, the + // loop above will be a no-op, since the copy's journal is empty. + // Thus, here we iterate over stateObjects, to enable copies of copies + for addr := range self.stateObjectsDirty { + if _, exist := state.stateObjects[addr]; !exist { + state.stateObjects[addr] = self.stateObjects[addr].deepCopy(state) + state.stateObjectsDirty[addr] = struct{}{} + } + } + for hash, logs := range self.logs { + cpy := make([]*types.Log, len(logs)) + for i, l := range logs { + cpy[i] = new(types.Log) + *cpy[i] = *l + } + state.logs[hash] = cpy + } + for hash, preimage := range self.preimages { + state.preimages[hash] = preimage + } + return state +} + +// Snapshot returns an identifier for the current revision of the state. +func (self *StateDB) Snapshot() int { + id := self.nextRevisionId + self.nextRevisionId++ + self.validRevisions = append(self.validRevisions, revision{id, self.journal.length()}) + return id +} + +// RevertToSnapshot reverts all state changes made since the given revision. +func (self *StateDB) RevertToSnapshot(revid int) { + // Find the snapshot in the stack of valid snapshots. + idx := sort.Search(len(self.validRevisions), func(i int) bool { + return self.validRevisions[i].id >= revid + }) + if idx == len(self.validRevisions) || self.validRevisions[idx].id != revid { + panic(fmt.Errorf("revision id %v cannot be reverted", revid)) + } + snapshot := self.validRevisions[idx].journalIndex + + // Replay the journal to undo changes and remove invalidated snapshots + self.journal.revert(self, snapshot) + self.validRevisions = self.validRevisions[:idx] +} + +// GetRefund returns the current value of the refund counter. +func (self *StateDB) GetRefund() uint64 { + return self.refund +} + +// Finalise finalises the state by removing the self destructed objects +// and clears the journal as well as the refunds. +func (s *StateDB) Finalise(deleteEmptyObjects bool) { + for addr := range s.journal.dirties { + stateObject, exist := s.stateObjects[addr] + if !exist { + // ripeMD is 'touched' at block 1714175, in tx 0x1237f737031e40bcde4a8b7e717b2d15e3ecadfe49bb1bbc71ee9deb09c6fcf2 + // That tx goes out of gas, and although the notion of 'touched' does not exist there, the + // touch-event will still be recorded in the journal. Since ripeMD is a special snowflake, + // it will persist in the journal even though the journal is reverted. In this special circumstance, + // it may exist in `s.journal.dirties` but not in `s.stateObjects`. + // Thus, we can safely ignore it here + continue + } + + if stateObject.suicided || (deleteEmptyObjects && stateObject.empty()) { + s.deleteStateObject(stateObject) + } else { + stateObject.updateRoot(s.db) + s.updateStateObject(stateObject) + } + s.stateObjectsDirty[addr] = struct{}{} + } + // Invalidate journal because reverting across transactions is not allowed. + s.clearJournalAndRefund() +} + +// IntermediateRoot computes the current root hash of the state trie. +// It is called in between transactions to get the root hash that +// goes into transaction receipts. +func (s *StateDB) IntermediateRoot(deleteEmptyObjects bool) common.Hash { + s.Finalise(deleteEmptyObjects) + + // Track the amount of time wasted on hashing the account trie + if metrics.EnabledExpensive { + defer func(start time.Time) { s.AccountHashes += time.Since(start) }(time.Now()) + } + return s.trie.Hash() +} + +// Prepare sets the current transaction hash and index and block hash which is +// used when the EVM emits new state logs. +func (self *StateDB) Prepare(thash, bhash common.Hash, ti int) { + self.thash = thash + self.bhash = bhash + self.txIndex = ti +} + +func (s *StateDB) clearJournalAndRefund() { + s.journal = newJournal() + s.validRevisions = s.validRevisions[:0] + s.refund = 0 +} + +// Commit writes the state to the underlying in-memory trie database. +func (s *StateDB) Commit(deleteEmptyObjects bool) (root common.Hash, err error) { + defer s.clearJournalAndRefund() + + for addr := range s.journal.dirties { + s.stateObjectsDirty[addr] = struct{}{} + } + // Commit objects to the trie, measuring the elapsed time + for addr, stateObject := range s.stateObjects { + _, isDirty := s.stateObjectsDirty[addr] + switch { + case stateObject.suicided || (isDirty && deleteEmptyObjects && stateObject.empty()): + // If the object has been removed, don't bother syncing it + // and just mark it for deletion in the trie. + s.deleteStateObject(stateObject) + case isDirty: + // Write any contract code associated with the state object + if stateObject.code != nil && stateObject.dirtyCode { + s.db.TrieDB().InsertBlob(common.BytesToHash(stateObject.CodeHash()), stateObject.code) + stateObject.dirtyCode = false + } + // Write any storage changes in the state object to its storage trie. + if err := stateObject.CommitTrie(s.db); err != nil { + return common.Hash{}, err + } + // Update the object in the main account trie. + s.updateStateObject(stateObject) + } + delete(s.stateObjectsDirty, addr) + } + // Write the account trie changes, measuing the amount of wasted time + if metrics.EnabledExpensive { + defer func(start time.Time) { s.AccountCommits += time.Since(start) }(time.Now()) + } + root, err = s.trie.Commit(func(leaf []byte, parent common.Hash) error { + var account Account + if err := rlp.DecodeBytes(leaf, &account); err != nil { + return nil + } + if account.Root != emptyRoot { + s.db.TrieDB().Reference(account.Root, parent) + } + code := common.BytesToHash(account.CodeHash) + if code != emptyCode { + s.db.TrieDB().Reference(code, parent) + } + return nil + }) + return root, err +} -- cgit v1.2.3