Official Go implementation of the Ethereum protocol
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go-ethereum/core/state/sync_test.go

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21 KiB

// Copyright 2015 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 state
import (
"bytes"
"math/big"
"testing"
"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/rlp"
"github.com/ethereum/go-ethereum/trie"
)
// testAccount is the data associated with an account used by the state tests.
type testAccount struct {
address common.Address
balance *big.Int
nonce uint64
code []byte
}
// makeTestState create a sample test state to test node-wise reconstruction.
func makeTestState() (Database, common.Hash, []*testAccount) {
// Create an empty state
db := NewDatabase(rawdb.NewMemoryDatabase())
state, _ := New(common.Hash{}, db, nil)
// Fill it with some arbitrary data
var accounts []*testAccount
for i := byte(0); i < 96; i++ {
obj := state.GetOrNewStateObject(common.BytesToAddress([]byte{i}))
acc := &testAccount{address: common.BytesToAddress([]byte{i})}
obj.AddBalance(big.NewInt(int64(11 * i)))
acc.balance = big.NewInt(int64(11 * i))
obj.SetNonce(uint64(42 * i))
acc.nonce = uint64(42 * i)
if i%3 == 0 {
obj.SetCode(crypto.Keccak256Hash([]byte{i, i, i, i, i}), []byte{i, i, i, i, i})
acc.code = []byte{i, i, i, i, i}
}
if i%5 == 0 {
for j := byte(0); j < 5; j++ {
hash := crypto.Keccak256Hash([]byte{i, i, i, i, i, j, j})
obj.SetState(db, hash, hash)
}
}
state.updateStateObject(obj)
accounts = append(accounts, acc)
}
root, _ := state.Commit(false)
// Return the generated state
return db, root, accounts
}
// checkStateAccounts cross references a reconstructed state with an expected
// account array.
func checkStateAccounts(t *testing.T, db ethdb.Database, root common.Hash, accounts []*testAccount) {
// Check root availability and state contents
state, err := New(root, NewDatabase(db), nil)
if err != nil {
t.Fatalf("failed to create state trie at %x: %v", root, err)
}
if err := checkStateConsistency(db, root); err != nil {
t.Fatalf("inconsistent state trie at %x: %v", root, err)
}
for i, acc := range accounts {
if balance := state.GetBalance(acc.address); balance.Cmp(acc.balance) != 0 {
t.Errorf("account %d: balance mismatch: have %v, want %v", i, balance, acc.balance)
}
if nonce := state.GetNonce(acc.address); nonce != acc.nonce {
t.Errorf("account %d: nonce mismatch: have %v, want %v", i, nonce, acc.nonce)
}
if code := state.GetCode(acc.address); !bytes.Equal(code, acc.code) {
t.Errorf("account %d: code mismatch: have %x, want %x", i, code, acc.code)
}
}
}
// checkTrieConsistency checks that all nodes in a (sub-)trie are indeed present.
func checkTrieConsistency(db ethdb.Database, 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))
if err != nil {
return err
}
it := trie.NodeIterator(nil)
for it.Next(true) {
}
return it.Error()
}
// checkStateConsistency checks that all data of a state root is present.
func checkStateConsistency(db ethdb.Database, root common.Hash) error {
// Create and iterate a state trie rooted in a sub-node
if _, err := db.Get(root.Bytes()); err != nil {
return nil // Consider a non existent state consistent.
}
state, err := New(root, NewDatabase(db), nil)
if err != nil {
return err
}
it := NewNodeIterator(state)
for it.Next() {
}
return it.Error
}
// Tests that an empty state is not scheduled for syncing.
func TestEmptyStateSync(t *testing.T) {
empty := common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
sync := NewStateSync(empty, rawdb.NewMemoryDatabase(), nil)
if paths, nodes, codes := sync.Missing(1); len(paths) != 0 || len(nodes) != 0 || len(codes) != 0 {
t.Errorf("content requested for empty state: %v, %v, %v", nodes, paths, codes)
}
}
// Tests that given a root hash, a state can sync iteratively on a single thread,
// requesting retrieval tasks and returning all of them in one go.
func TestIterativeStateSyncIndividual(t *testing.T) {
testIterativeStateSync(t, 1, false, false)
}
func TestIterativeStateSyncBatched(t *testing.T) {
testIterativeStateSync(t, 100, false, false)
}
func TestIterativeStateSyncIndividualFromDisk(t *testing.T) {
testIterativeStateSync(t, 1, true, false)
}
func TestIterativeStateSyncBatchedFromDisk(t *testing.T) {
testIterativeStateSync(t, 100, true, false)
}
func TestIterativeStateSyncIndividualByPath(t *testing.T) {
testIterativeStateSync(t, 1, false, true)
}
func TestIterativeStateSyncBatchedByPath(t *testing.T) {
testIterativeStateSync(t, 100, false, true)
}
// stateElement represents the element in the state trie(bytecode or trie node).
type stateElement struct {
path string
hash common.Hash
code common.Hash
syncPath trie.SyncPath
}
func testIterativeStateSync(t *testing.T, count int, commit bool, bypath bool) {
// Create a random state to copy
srcDb, srcRoot, srcAccounts := makeTestState()
if commit {
srcDb.TrieDB().Commit(srcRoot, false, nil)
}
srcTrie, _ := trie.New(common.Hash{}, srcRoot, srcDb.TrieDB())
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, nil)
var (
nodeElements []stateElement
codeElements []stateElement
)
paths, nodes, codes := sched.Missing(count)
for i := 0; i < len(paths); i++ {
nodeElements = append(nodeElements, stateElement{
path: paths[i],
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(paths[i])),
})
}
for i := 0; i < len(codes); i++ {
codeElements = append(codeElements, stateElement{
code: codes[i],
})
}
for len(nodeElements)+len(codeElements) > 0 {
var (
nodeResults = make([]trie.NodeSyncResult, len(nodeElements))
codeResults = make([]trie.CodeSyncResult, len(codeElements))
)
for i, element := range codeElements {
data, err := srcDb.ContractCode(common.Hash{}, element.code)
if err != nil {
t.Fatalf("failed to retrieve contract bytecode for hash %x", element.code)
}
codeResults[i] = trie.CodeSyncResult{Hash: element.code, Data: data}
}
for i, node := range nodeElements {
if bypath {
if len(node.syncPath) == 1 {
data, _, err := srcTrie.TryGetNode(node.syncPath[0])
if err != nil {
t.Fatalf("failed to retrieve node data for path %x: %v", node.syncPath[0], err)
}
nodeResults[i] = trie.NodeSyncResult{Path: node.path, Data: data}
} else {
var acc types.StateAccount
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())
if err != nil {
t.Fatalf("failed to retriev storage trie for path %x: %v", node.syncPath[1], err)
}
data, _, err := stTrie.TryGetNode(node.syncPath[1])
if err != nil {
t.Fatalf("failed to retrieve node data for path %x: %v", node.syncPath[1], err)
}
nodeResults[i] = trie.NodeSyncResult{Path: node.path, Data: data}
}
} else {
data, err := srcDb.TrieDB().Node(node.hash)
if err != nil {
t.Fatalf("failed to retrieve node data for key %v", []byte(node.path))
}
nodeResults[i] = trie.NodeSyncResult{Path: node.path, Data: data}
}
}
for _, result := range codeResults {
if err := sched.ProcessCode(result); err != nil {
t.Errorf("failed to process result %v", err)
}
}
for _, result := range nodeResults {
if err := sched.ProcessNode(result); err != nil {
t.Errorf("failed to process result %v", err)
}
}
batch := dstDb.NewBatch()
if err := sched.Commit(batch); err != nil {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
paths, nodes, codes = sched.Missing(count)
nodeElements = nodeElements[:0]
for i := 0; i < len(paths); i++ {
nodeElements = append(nodeElements, stateElement{
path: paths[i],
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(paths[i])),
})
}
codeElements = codeElements[:0]
for i := 0; i < len(codes); i++ {
codeElements = append(codeElements, stateElement{
code: codes[i],
})
}
}
// Cross check that the two states are in sync
checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
}
// Tests that the trie scheduler can correctly reconstruct the state even if only
// partial results are returned, and the others sent only later.
func TestIterativeDelayedStateSync(t *testing.T) {
// Create a random state to copy
srcDb, srcRoot, srcAccounts := makeTestState()
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, nil)
var (
nodeElements []stateElement
codeElements []stateElement
)
paths, nodes, codes := sched.Missing(0)
for i := 0; i < len(paths); i++ {
nodeElements = append(nodeElements, stateElement{
path: paths[i],
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(paths[i])),
})
}
for i := 0; i < len(codes); i++ {
codeElements = append(codeElements, stateElement{
code: codes[i],
})
}
for len(nodeElements)+len(codeElements) > 0 {
// Sync only half of the scheduled nodes
var nodeProcessd int
var codeProcessd int
if len(codeElements) > 0 {
codeResults := make([]trie.CodeSyncResult, len(codeElements)/2+1)
for i, element := range codeElements[:len(codeResults)] {
data, err := srcDb.ContractCode(common.Hash{}, element.code)
if err != nil {
t.Fatalf("failed to retrieve contract bytecode for %x", element.code)
}
codeResults[i] = trie.CodeSyncResult{Hash: element.code, Data: data}
}
for _, result := range codeResults {
if err := sched.ProcessCode(result); err != nil {
t.Fatalf("failed to process result %v", err)
}
}
codeProcessd = len(codeResults)
}
if len(nodeElements) > 0 {
nodeResults := make([]trie.NodeSyncResult, len(nodeElements)/2+1)
for i, element := range nodeElements[:len(nodeResults)] {
data, err := srcDb.TrieDB().Node(element.hash)
if err != nil {
t.Fatalf("failed to retrieve contract bytecode for %x", element.code)
}
nodeResults[i] = trie.NodeSyncResult{Path: element.path, Data: data}
}
for _, result := range nodeResults {
if err := sched.ProcessNode(result); err != nil {
t.Fatalf("failed to process result %v", err)
}
}
nodeProcessd = len(nodeResults)
}
batch := dstDb.NewBatch()
if err := sched.Commit(batch); err != nil {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
paths, nodes, codes = sched.Missing(0)
nodeElements = nodeElements[nodeProcessd:]
for i := 0; i < len(paths); i++ {
nodeElements = append(nodeElements, stateElement{
path: paths[i],
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(paths[i])),
})
}
codeElements = codeElements[codeProcessd:]
for i := 0; i < len(codes); i++ {
codeElements = append(codeElements, stateElement{
code: codes[i],
})
}
}
// Cross check that the two states are in sync
checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
}
// Tests that given a root hash, a trie can sync iteratively on a single thread,
// requesting retrieval tasks and returning all of them in one go, however in a
// random order.
func TestIterativeRandomStateSyncIndividual(t *testing.T) { testIterativeRandomStateSync(t, 1) }
func TestIterativeRandomStateSyncBatched(t *testing.T) { testIterativeRandomStateSync(t, 100) }
func testIterativeRandomStateSync(t *testing.T, count int) {
// Create a random state to copy
srcDb, srcRoot, srcAccounts := makeTestState()
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, nil)
nodeQueue := make(map[string]stateElement)
codeQueue := make(map[common.Hash]struct{})
paths, nodes, codes := sched.Missing(count)
for i, path := range paths {
nodeQueue[path] = stateElement{
path: path,
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(path)),
}
}
for _, hash := range codes {
codeQueue[hash] = struct{}{}
}
for len(nodeQueue)+len(codeQueue) > 0 {
// Fetch all the queued nodes in a random order
if len(codeQueue) > 0 {
results := make([]trie.CodeSyncResult, 0, len(codeQueue))
for hash := range codeQueue {
data, err := srcDb.ContractCode(common.Hash{}, hash)
if err != nil {
t.Fatalf("failed to retrieve node data for %x", hash)
}
results = append(results, trie.CodeSyncResult{Hash: hash, Data: data})
}
for _, result := range results {
if err := sched.ProcessCode(result); err != nil {
t.Fatalf("failed to process result %v", err)
}
}
}
if len(nodeQueue) > 0 {
results := make([]trie.NodeSyncResult, 0, len(nodeQueue))
for path, element := range nodeQueue {
data, err := srcDb.TrieDB().Node(element.hash)
if err != nil {
t.Fatalf("failed to retrieve node data for %x %v %v", element.hash, []byte(element.path), element.path)
}
results = append(results, trie.NodeSyncResult{Path: path, Data: data})
}
for _, result := range results {
if err := sched.ProcessNode(result); err != nil {
t.Fatalf("failed to process result %v", err)
}
}
}
// Feed the retrieved results back and queue new tasks
batch := dstDb.NewBatch()
if err := sched.Commit(batch); err != nil {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
nodeQueue = make(map[string]stateElement)
codeQueue = make(map[common.Hash]struct{})
paths, nodes, codes := sched.Missing(count)
for i, path := range paths {
nodeQueue[path] = stateElement{
path: path,
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(path)),
}
}
for _, hash := range codes {
codeQueue[hash] = struct{}{}
}
}
// Cross check that the two states are in sync
checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
}
// Tests that the trie scheduler can correctly reconstruct the state even if only
// partial results are returned (Even those randomly), others sent only later.
func TestIterativeRandomDelayedStateSync(t *testing.T) {
// Create a random state to copy
srcDb, srcRoot, srcAccounts := makeTestState()
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, nil)
nodeQueue := make(map[string]stateElement)
codeQueue := make(map[common.Hash]struct{})
paths, nodes, codes := sched.Missing(0)
for i, path := range paths {
nodeQueue[path] = stateElement{
path: path,
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(path)),
}
}
for _, hash := range codes {
codeQueue[hash] = struct{}{}
}
for len(nodeQueue)+len(codeQueue) > 0 {
// Sync only half of the scheduled nodes, even those in random order
if len(codeQueue) > 0 {
results := make([]trie.CodeSyncResult, 0, len(codeQueue)/2+1)
for hash := range codeQueue {
delete(codeQueue, hash)
data, err := srcDb.ContractCode(common.Hash{}, hash)
if err != nil {
t.Fatalf("failed to retrieve node data for %x", hash)
}
results = append(results, trie.CodeSyncResult{Hash: hash, Data: data})
if len(results) >= cap(results) {
break
}
}
for _, result := range results {
if err := sched.ProcessCode(result); err != nil {
t.Fatalf("failed to process result %v", err)
}
}
}
if len(nodeQueue) > 0 {
results := make([]trie.NodeSyncResult, 0, len(nodeQueue)/2+1)
for path, element := range nodeQueue {
delete(nodeQueue, path)
data, err := srcDb.TrieDB().Node(element.hash)
if err != nil {
t.Fatalf("failed to retrieve node data for %x", element.hash)
}
results = append(results, trie.NodeSyncResult{Path: path, Data: data})
if len(results) >= cap(results) {
break
}
}
// Feed the retrieved results back and queue new tasks
for _, result := range results {
if err := sched.ProcessNode(result); err != nil {
t.Fatalf("failed to process result %v", err)
}
}
}
batch := dstDb.NewBatch()
if err := sched.Commit(batch); err != nil {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
paths, nodes, codes := sched.Missing(0)
for i, path := range paths {
nodeQueue[path] = stateElement{
path: path,
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(path)),
}
}
for _, hash := range codes {
codeQueue[hash] = struct{}{}
}
}
// Cross check that the two states are in sync
checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
}
// Tests that at any point in time during a sync, only complete sub-tries are in
// the database.
func TestIncompleteStateSync(t *testing.T) {
// Create a random state to copy
srcDb, srcRoot, srcAccounts := makeTestState()
// isCodeLookup to save some hashing
var isCode = make(map[common.Hash]struct{})
for _, acc := range srcAccounts {
if len(acc.code) > 0 {
isCode[crypto.Keccak256Hash(acc.code)] = struct{}{}
}
}
isCode[common.BytesToHash(emptyCodeHash)] = struct{}{}
checkTrieConsistency(srcDb.TrieDB().DiskDB().(ethdb.Database), srcRoot)
// Create a destination state and sync with the scheduler
dstDb := rawdb.NewMemoryDatabase()
sched := NewStateSync(srcRoot, dstDb, nil)
var (
addedCodes []common.Hash
addedNodes []common.Hash
)
nodeQueue := make(map[string]stateElement)
codeQueue := make(map[common.Hash]struct{})
paths, nodes, codes := sched.Missing(1)
for i, path := range paths {
nodeQueue[path] = stateElement{
path: path,
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(path)),
}
}
for _, hash := range codes {
codeQueue[hash] = struct{}{}
}
for len(nodeQueue)+len(codeQueue) > 0 {
// Fetch a batch of state nodes
if len(codeQueue) > 0 {
results := make([]trie.CodeSyncResult, 0, len(codeQueue))
for hash := range codeQueue {
data, err := srcDb.ContractCode(common.Hash{}, hash)
if err != nil {
t.Fatalf("failed to retrieve node data for %x", hash)
}
results = append(results, trie.CodeSyncResult{Hash: hash, Data: data})
addedCodes = append(addedCodes, hash)
}
// Process each of the state nodes
for _, result := range results {
if err := sched.ProcessCode(result); err != nil {
t.Fatalf("failed to process result %v", err)
}
}
}
var nodehashes []common.Hash
if len(nodeQueue) > 0 {
results := make([]trie.NodeSyncResult, 0, len(nodeQueue))
for key, element := range nodeQueue {
data, err := srcDb.TrieDB().Node(element.hash)
if err != nil {
t.Fatalf("failed to retrieve node data for %x", element.hash)
}
results = append(results, trie.NodeSyncResult{Path: key, Data: data})
if element.hash != srcRoot {
addedNodes = append(addedNodes, element.hash)
}
nodehashes = append(nodehashes, element.hash)
}
// Process each of the state nodes
for _, result := range results {
if err := sched.ProcessNode(result); err != nil {
t.Fatalf("failed to process result %v", err)
}
}
}
batch := dstDb.NewBatch()
if err := sched.Commit(batch); err != nil {
t.Fatalf("failed to commit data: %v", err)
}
batch.Write()
for _, root := range nodehashes {
// Can't use checkStateConsistency here because subtrie keys may have odd
// length and crash in LeafKey.
if err := checkTrieConsistency(dstDb, root); err != nil {
t.Fatalf("state inconsistent: %v", err)
}
}
// Fetch the next batch to retrieve
nodeQueue = make(map[string]stateElement)
codeQueue = make(map[common.Hash]struct{})
paths, nodes, codes := sched.Missing(1)
for i, path := range paths {
nodeQueue[path] = stateElement{
path: path,
hash: nodes[i],
syncPath: trie.NewSyncPath([]byte(path)),
}
}
for _, hash := range codes {
codeQueue[hash] = struct{}{}
}
}
// Sanity check that removing any node from the database is detected
for _, node := range addedCodes {
val := rawdb.ReadCode(dstDb, node)
rawdb.DeleteCode(dstDb, node)
if err := checkStateConsistency(dstDb, srcRoot); err == nil {
t.Errorf("trie inconsistency not caught, missing: %x", node)
}
rawdb.WriteCode(dstDb, node, val)
}
for _, node := range addedNodes {
val := rawdb.ReadTrieNode(dstDb, node)
rawdb.DeleteTrieNode(dstDb, node)
if err := checkStateConsistency(dstDb, srcRoot); err == nil {
t.Errorf("trie inconsistency not caught, missing: %v", node.Hex())
}
rawdb.WriteTrieNode(dstDb, node, val)
}
}