core/state: move state account to core/types + abstracted "write account to trie" (#23567)

* core/state: abstracted "write account to trie" method

* fix appveyor build

* Apply suggestions from code review

Co-authored-by: Martin Holst Swende <martin@swende.se>

* review feedback

* core/state/accounts: move Account to core/types

* core/types: rename Account -> StateAccount

* core/state: restore EncodeRLP for stateObject

* core/types: add the missing file

* more review feedback

* more review feedback

Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: Felix Lange <fjl@twurst.com>

cmd/geth/snapshot.go

@@ -29,6 +29,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/state/pruner"
 	"github.com/ethereum/go-ethereum/core/state/snapshot"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/rlp"
@@ -287,7 +288,7 @@ func traverseState(ctx *cli.Context) error {
 	accIter := trie.NewIterator(t.NodeIterator(nil))
 	for accIter.Next() {
 		accounts += 1
-		var acc state.Account
+		var acc types.StateAccount
 		if err := rlp.DecodeBytes(accIter.Value, &acc); err != nil {
 			log.Error("Invalid account encountered during traversal", "err", err)
 			return err
@@ -393,7 +394,7 @@ func traverseRawState(ctx *cli.Context) error {
 		// dig into the storage trie further.
 		if accIter.Leaf() {
 			accounts += 1
-			var acc state.Account
+			var acc types.StateAccount
 			if err := rlp.DecodeBytes(accIter.LeafBlob(), &acc); err != nil {
 				log.Error("Invalid account encountered during traversal", "err", err)
 				return errors.New("invalid account")

core/state/database.go

@@ -23,6 +23,7 @@ import (
 	"github.com/VictoriaMetrics/fastcache"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/rawdb"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/trie"
 	lru "github.com/hashicorp/golang-lru"
@@ -70,6 +71,9 @@ type Trie interface {
 	// trie.MissingNodeError is returned.
 	TryGet(key []byte) ([]byte, error)
 
+	// TryUpdateAccount abstract an account write in the trie.
+	TryUpdateAccount(key []byte, account *types.StateAccount) error
+
 	// TryUpdate associates key with value in the trie. If value has length zero, any
 	// existing value is deleted from the trie. The value bytes must not be modified
 	// by the caller while they are stored in the trie. If a node was not found in the

core/state/dump.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/trie"
@@ -140,7 +141,7 @@ func (s *StateDB) DumpToCollector(c DumpCollector, conf *DumpConfig) (nextKey []
 
 	it := trie.NewIterator(s.trie.NodeIterator(conf.Start))
 	for it.Next() {
-		var data Account
+		var data types.StateAccount
 		if err := rlp.DecodeBytes(it.Value, &data); err != nil {
 			panic(err)
 		}

core/state/iterator.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/trie"
 )
@@ -104,7 +105,7 @@ func (it *NodeIterator) step() error {
 		return nil
 	}
 	// Otherwise we've reached an account node, initiate data iteration
-	var account Account
+	var account types.StateAccount
 	if err := rlp.Decode(bytes.NewReader(it.stateIt.LeafBlob()), &account); err != nil {
 		return err
 	}

core/state/pruner/pruner.go

@@ -29,7 +29,6 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/rawdb"
-	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/state/snapshot"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
@@ -426,7 +425,7 @@ func extractGenesis(db ethdb.Database, stateBloom *stateBloom) error {
 		// If it's a leaf node, yes we are touching an account,
 		// dig into the storage trie further.
 		if accIter.Leaf() {
-			var acc state.Account
+			var acc types.StateAccount
 			if err := rlp.DecodeBytes(accIter.LeafBlob(), &acc); err != nil {
 				return err
 			}

core/state/state_object.go

@@ -24,6 +24,7 @@ import (
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/metrics"
 	"github.com/ethereum/go-ethereum/rlp"
@@ -65,7 +66,7 @@ func (s Storage) Copy() Storage {
 type stateObject struct {
 	address  common.Address
 	addrHash common.Hash // hash of ethereum address of the account
-	data     Account
+	data     types.StateAccount
 	db       *StateDB
 
 	// DB error.
@@ -97,17 +98,8 @@ func (s *stateObject) empty() bool {
 	return s.data.Nonce == 0 && s.data.Balance.Sign() == 0 && bytes.Equal(s.data.CodeHash, emptyCodeHash)
 }
 
-// Account is the Ethereum consensus representation of accounts.
-// These objects are stored in the main account trie.
-type Account struct {
-	Nonce    uint64
-	Balance  *big.Int
-	Root     common.Hash // merkle root of the storage trie
-	CodeHash []byte
-}
-
 // newObject creates a state object.
-func newObject(db *StateDB, address common.Address, data Account) *stateObject {
+func newObject(db *StateDB, address common.Address, data types.StateAccount) *stateObject {
 	if data.Balance == nil {
 		data.Balance = new(big.Int)
 	}
@@ -130,7 +122,7 @@ func newObject(db *StateDB, address common.Address, data Account) *stateObject {
 
 // EncodeRLP implements rlp.Encoder.
 func (s *stateObject) EncodeRLP(w io.Writer) error {
-	return rlp.Encode(w, s.data)
+	return rlp.Encode(w, &s.data)
 }
 
 // setError remembers the first non-nil error it is called with.

core/state/statedb.go

@@ -460,12 +460,7 @@ func (s *StateDB) updateStateObject(obj *stateObject) {
 	}
 	// Encode the account and update the account trie
 	addr := obj.Address()
-
+	if err := s.trie.TryUpdateAccount(addr[:], &obj.data); err != nil {
-	data, err := rlp.EncodeToBytes(obj)
-	if err != nil {
-		panic(fmt.Errorf("can't encode object at %x: %v", addr[:], err))
-	}
-	if err = s.trie.TryUpdate(addr[:], data); err != nil {
 		s.setError(fmt.Errorf("updateStateObject (%x) error: %v", addr[:], err))
 	}
 
@@ -512,7 +507,7 @@ func (s *StateDB) getDeletedStateObject(addr common.Address) *stateObject {
 	}
 	// If no live objects are available, attempt to use snapshots
 	var (
-		data *Account
+		data *types.StateAccount
 		err  error
 	)
 	if s.snap != nil {
@@ -524,7 +519,7 @@ func (s *StateDB) getDeletedStateObject(addr common.Address) *stateObject {
 			if acc == nil {
 				return nil
 			}
-			data = &Account{
+			data = &types.StateAccount{
 				Nonce:    acc.Nonce,
 				Balance:  acc.Balance,
 				CodeHash: acc.CodeHash,
@@ -551,7 +546,7 @@ func (s *StateDB) getDeletedStateObject(addr common.Address) *stateObject {
 		if len(enc) == 0 {
 			return nil
 		}
-		data = new(Account)
+		data = new(types.StateAccount)
 		if err := rlp.DecodeBytes(enc, data); err != nil {
 			log.Error("Failed to decode state object", "addr", addr, "err", err)
 			return nil
@@ -588,7 +583,7 @@ func (s *StateDB) createObject(addr common.Address) (newobj, prev *stateObject)
 			s.snapDestructs[prev.addrHash] = struct{}{}
 		}
 	}
-	newobj = newObject(s, addr, Account{})
+	newobj = newObject(s, addr, types.StateAccount{})
 	if prev == nil {
 		s.journal.append(createObjectChange{account: &addr})
 	} else {
@@ -942,7 +937,7 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (common.Hash, error) {
 	}
 	// The onleaf func is called _serially_, so we can reuse the same account
 	// for unmarshalling every time.
-	var account Account
+	var account types.StateAccount
 	root, accountCommitted, err := s.trie.Commit(func(_ [][]byte, _ []byte, leaf []byte, parent common.Hash) error {
 		if err := rlp.DecodeBytes(leaf, &account); err != nil {
 			return nil

core/state/sync.go

@@ -20,6 +20,7 @@ import (
 	"bytes"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/trie"
@@ -43,7 +44,7 @@ func NewStateSync(root common.Hash, database ethdb.KeyValueReader, bloom *trie.S
 				return err
 			}
 		}
-		var obj Account
+		var obj types.StateAccount
 		if err := rlp.Decode(bytes.NewReader(leaf), &obj); err != nil {
 			return err
 		}

core/state/sync_test.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/rawdb"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/ethdb/memorydb"
@@ -203,7 +204,7 @@ func testIterativeStateSync(t *testing.T, count int, commit bool, bypath bool) {
 				}
 				results[len(hashQueue)+i] = trie.SyncResult{Hash: crypto.Keccak256Hash(data), Data: data}
 			} else {
-				var acc Account
+				var acc types.StateAccount
 				if err := rlp.DecodeBytes(srcTrie.Get(path[0]), &acc); err != nil {
 					t.Fatalf("failed to decode account on path %x: %v", path, err)
 				}

core/types/state_account.go

@@ -0,0 +1,32 @@
+// Copyright 2021 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 types
+
+import (
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/common"
+)
+
+// StateAccount is the Ethereum consensus representation of accounts.
+// These objects are stored in the main account trie.
+type StateAccount struct {
+	Nonce    uint64
+	Balance  *big.Int
+	Root     common.Hash // merkle root of the storage trie
+	CodeHash []byte
+}

eth/protocols/snap/handler.go

@@ -23,7 +23,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core"
-	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/light"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/metrics"
@@ -319,7 +319,7 @@ func handleMessage(backend Backend, peer *Peer) error {
 				if err != nil {
 					return p2p.Send(peer.rw, StorageRangesMsg, &StorageRangesPacket{ID: req.ID})
 				}
-				var acc state.Account
+				var acc types.StateAccount
 				if err := rlp.DecodeBytes(accTrie.Get(account[:]), &acc); err != nil {
 					return p2p.Send(peer.rw, StorageRangesMsg, &StorageRangesPacket{ID: req.ID})
 				}

eth/protocols/snap/sync.go

@@ -32,6 +32,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/core/state"
 	"github.com/ethereum/go-ethereum/core/state/snapshot"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/event"
@@ -126,7 +127,7 @@ type accountResponse struct {
 	task *accountTask // Task which this request is filling
 
 	hashes   []common.Hash         // Account hashes in the returned range
-	accounts []*state.Account // Expanded accounts in the returned range
+	accounts []*types.StateAccount // Expanded accounts in the returned range
 
 	cont bool // Whether the account range has a continuation
 }
@@ -2274,9 +2275,9 @@ func (s *Syncer) OnAccounts(peer SyncPeer, id uint64, hashes []common.Hash, acco
 		s.scheduleRevertAccountRequest(req)
 		return err
 	}
-	accs := make([]*state.Account, len(accounts))
+	accs := make([]*types.StateAccount, len(accounts))
 	for i, account := range accounts {
-		acc := new(state.Account)
+		acc := new(types.StateAccount)
 		if err := rlp.DecodeBytes(account, acc); err != nil {
 			panic(err) // We created these blobs, we must be able to decode them
 		}
@@ -2740,7 +2741,7 @@ func (s *Syncer) onHealByteCodes(peer SyncPeer, id uint64, bytecodes [][]byte) e
 // Note it's not concurrent safe, please handle the concurrent issue outside.
 func (s *Syncer) onHealState(paths [][]byte, value []byte) error {
 	if len(paths) == 1 {
-		var account state.Account
+		var account types.StateAccount
 		if err := rlp.DecodeBytes(value, &account); err != nil {
 			return nil
 		}

eth/protocols/snap/sync_test.go

@@ -29,7 +29,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/rawdb"
-	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/light"
@@ -1349,7 +1349,7 @@ func makeAccountTrieNoStorage(n int) (*trie.Trie, entrySlice) {
 	accTrie, _ := trie.New(common.Hash{}, db)
 	var entries entrySlice
 	for i := uint64(1); i <= uint64(n); i++ {
-		value, _ := rlp.EncodeToBytes(state.Account{
+		value, _ := rlp.EncodeToBytes(types.StateAccount{
 			Nonce:    i,
 			Balance:  big.NewInt(int64(i)),
 			Root:     emptyRoot,
@@ -1394,7 +1394,7 @@ func makeBoundaryAccountTrie(n int) (*trie.Trie, entrySlice) {
 	}
 	// Fill boundary accounts
 	for i := 0; i < len(boundaries); i++ {
-		value, _ := rlp.EncodeToBytes(state.Account{
+		value, _ := rlp.EncodeToBytes(types.StateAccount{
 			Nonce:    uint64(0),
 			Balance:  big.NewInt(int64(i)),
 			Root:     emptyRoot,
@@ -1406,7 +1406,7 @@ func makeBoundaryAccountTrie(n int) (*trie.Trie, entrySlice) {
 	}
 	// Fill other accounts if required
 	for i := uint64(1); i <= uint64(n); i++ {
-		value, _ := rlp.EncodeToBytes(state.Account{
+		value, _ := rlp.EncodeToBytes(types.StateAccount{
 			Nonce:    i,
 			Balance:  big.NewInt(int64(i)),
 			Root:     emptyRoot,
@@ -1442,7 +1442,7 @@ func makeAccountTrieWithStorageWithUniqueStorage(accounts, slots int, code bool)
 		stTrie, stEntries := makeStorageTrieWithSeed(uint64(slots), i, db)
 		stRoot := stTrie.Hash()
 		stTrie.Commit(nil)
-		value, _ := rlp.EncodeToBytes(state.Account{
+		value, _ := rlp.EncodeToBytes(types.StateAccount{
 			Nonce:    i,
 			Balance:  big.NewInt(int64(i)),
 			Root:     stRoot,
@@ -1489,7 +1489,7 @@ func makeAccountTrieWithStorage(accounts, slots int, code, boundary bool) (*trie
 		if code {
 			codehash = getCodeHash(i)
 		}
-		value, _ := rlp.EncodeToBytes(state.Account{
+		value, _ := rlp.EncodeToBytes(types.StateAccount{
 			Nonce:    i,
 			Balance:  big.NewInt(int64(i)),
 			Root:     stRoot,

les/server_handler.go

@@ -27,7 +27,7 @@ import (
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/forkid"
 	"github.com/ethereum/go-ethereum/core/rawdb"
-	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/les/flowcontrol"
 	"github.com/ethereum/go-ethereum/light"
@@ -358,20 +358,20 @@ func (h *serverHandler) AddTxsSync() bool {
 }
 
 // getAccount retrieves an account from the state based on root.
-func getAccount(triedb *trie.Database, root, hash common.Hash) (state.Account, error) {
+func getAccount(triedb *trie.Database, root, hash common.Hash) (types.StateAccount, error) {
 	trie, err := trie.New(root, triedb)
 	if err != nil {
-		return state.Account{}, err
+		return types.StateAccount{}, err
 	}
 	blob, err := trie.TryGet(hash[:])
 	if err != nil {
-		return state.Account{}, err
+		return types.StateAccount{}, err
 	}
-	var account state.Account
+	var acc types.StateAccount
-	if err = rlp.DecodeBytes(blob, &account); err != nil {
+	if err = rlp.DecodeBytes(blob, &acc); err != nil {
-		return state.Account{}, err
+		return types.StateAccount{}, err
 	}
-	return account, nil
+	return acc, nil
 }
 
 // getHelperTrie returns the post-processed trie root for the given trie ID and section index

light/trie.go

@@ -27,6 +27,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/rlp"
 	"github.com/ethereum/go-ethereum/trie"
 )
 
@@ -111,6 +112,17 @@ func (t *odrTrie) TryGet(key []byte) ([]byte, error) {
 	return res, err
 }
 
+func (t *odrTrie) TryUpdateAccount(key []byte, acc *types.StateAccount) error {
+	key = crypto.Keccak256(key)
+	value, err := rlp.EncodeToBytes(acc)
+	if err != nil {
+		return fmt.Errorf("decoding error in account update: %w", err)
+	}
+	return t.do(key, func() error {
+		return t.trie.TryUpdate(key, value)
+	})
+}
+
 func (t *odrTrie) TryUpdate(key, value []byte) error {
 	key = crypto.Keccak256(key)
 	return t.do(key, func() error {

trie/secure_trie.go

@@ -20,7 +20,9 @@ import (
 	"fmt"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/rlp"
 )
 
 // SecureTrie wraps a trie with key hashing. In a secure trie, all
@@ -85,6 +87,21 @@ func (t *SecureTrie) TryGetNode(path []byte) ([]byte, int, error) {
 	return t.trie.TryGetNode(path)
 }
 
+// TryUpdate account will abstract the write of an account to the
+// secure trie.
+func (t *SecureTrie) TryUpdateAccount(key []byte, acc *types.StateAccount) error {
+	hk := t.hashKey(key)
+	data, err := rlp.EncodeToBytes(acc)
+	if err != nil {
+		return err
+	}
+	if err := t.trie.TryUpdate(hk, data); err != nil {
+		return err
+	}
+	t.getSecKeyCache()[string(hk)] = common.CopyBytes(key)
+	return nil
+}
+
 // Update associates key with value in the trie. Subsequent calls to
 // Get will return value. If value has length zero, any existing value
 // is deleted from the trie and calls to Get will return nil.

trie/trie.go

@@ -24,8 +24,10 @@ import (
 	"sync"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/rlp"
 )
 
 var (
@@ -246,6 +248,14 @@ func (t *Trie) Update(key, value []byte) {
 	}
 }
 
+func (t *Trie) TryUpdateAccount(key []byte, acc *types.StateAccount) error {
+	data, err := rlp.EncodeToBytes(acc)
+	if err != nil {
+		return fmt.Errorf("can't encode object at %x: %w", key[:], err)
+	}
+	return t.TryUpdate(key, data)
+}
+
 // TryUpdate associates key with value in the trie. Subsequent calls to
 // Get will return value. If value has length zero, any existing value
 // is deleted from the trie and calls to Get will return nil.

trie/trie_test.go

@@ -32,6 +32,7 @@ import (
 
 	"github.com/davecgh/go-spew/spew"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/ethdb/leveldb"
@@ -553,13 +554,6 @@ func BenchmarkHash(b *testing.B) {
 	trie.Hash()
 }
 
-type account struct {
-	Nonce   uint64
-	Balance *big.Int
-	Root    common.Hash
-	Code    []byte
-}
-
 // Benchmarks the trie Commit following a Hash. Since the trie caches the result of any operation,
 // we cannot use b.N as the number of hashing rouns, since all rounds apart from
 // the first one will be NOOP. As such, we'll use b.N as the number of account to
@@ -568,7 +562,7 @@ func BenchmarkCommitAfterHash(b *testing.B) {
 	b.Run("no-onleaf", func(b *testing.B) {
 		benchmarkCommitAfterHash(b, nil)
 	})
-	var a account
+	var a types.StateAccount
 	onleaf := func(paths [][]byte, hexpath []byte, leaf []byte, parent common.Hash) error {
 		rlp.DecodeBytes(leaf, &a)
 		return nil
@@ -664,7 +658,7 @@ func makeAccounts(size int) (addresses [][20]byte, accounts [][]byte) {
 		balanceBytes := make([]byte, numBytes)
 		random.Read(balanceBytes)
 		balance := new(big.Int).SetBytes(balanceBytes)
-		data, _ := rlp.EncodeToBytes(&account{nonce, balance, root, code})
+		data, _ := rlp.EncodeToBytes(&types.StateAccount{Nonce: nonce, Balance: balance, Root: root, CodeHash: code})
 		accounts[i] = data
 	}
 	return addresses, accounts