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323 lines
11 KiB
323 lines
11 KiB
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package state
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import (
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"bytes"
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"math/big"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/trie"
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)
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// testAccount is the data associated with an account used by the state tests.
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type testAccount struct {
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address common.Address
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balance *big.Int
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nonce uint64
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code []byte
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}
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// makeTestState create a sample test state to test node-wise reconstruction.
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func makeTestState() (ethdb.Database, common.Hash, []*testAccount) {
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// Create an empty state
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db, _ := ethdb.NewMemDatabase()
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state, _ := New(common.Hash{}, db)
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// Fill it with some arbitrary data
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accounts := []*testAccount{}
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for i := byte(0); i < 96; i++ {
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obj := state.GetOrNewStateObject(common.BytesToAddress([]byte{i}))
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acc := &testAccount{address: common.BytesToAddress([]byte{i})}
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obj.AddBalance(big.NewInt(int64(11 * i)))
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acc.balance = big.NewInt(int64(11 * i))
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obj.SetNonce(uint64(42 * i))
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acc.nonce = uint64(42 * i)
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if i%3 == 0 {
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obj.SetCode([]byte{i, i, i, i, i})
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acc.code = []byte{i, i, i, i, i}
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}
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state.UpdateStateObject(obj)
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accounts = append(accounts, acc)
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}
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root, _ := state.Commit()
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// Return the generated state
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return db, root, accounts
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}
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// checkStateAccounts cross references a reconstructed state with an expected
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// account array.
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func checkStateAccounts(t *testing.T, db ethdb.Database, root common.Hash, accounts []*testAccount) {
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// Check root availability and state contents
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state, err := New(root, db)
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if err != nil {
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t.Fatalf("failed to create state trie at %x: %v", root, err)
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}
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if err := checkStateConsistency(db, root); err != nil {
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t.Fatalf("inconsistent state trie at %x: %v", root, err)
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}
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for i, acc := range accounts {
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if balance := state.GetBalance(acc.address); balance.Cmp(acc.balance) != 0 {
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t.Errorf("account %d: balance mismatch: have %v, want %v", i, balance, acc.balance)
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}
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if nonce := state.GetNonce(acc.address); nonce != acc.nonce {
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t.Errorf("account %d: nonce mismatch: have %v, want %v", i, nonce, acc.nonce)
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}
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if code := state.GetCode(acc.address); bytes.Compare(code, acc.code) != 0 {
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t.Errorf("account %d: code mismatch: have %x, want %x", i, code, acc.code)
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}
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}
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}
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// checkStateConsistency checks that all nodes in a state trie are indeed present.
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func checkStateConsistency(db ethdb.Database, root common.Hash) error {
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// Create and iterate a state trie rooted in a sub-node
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if _, err := db.Get(root.Bytes()); err != nil {
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return nil // Consider a non existent state consistent
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}
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state, err := New(root, db)
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if err != nil {
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return err
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}
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it := NewNodeIterator(state)
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for it.Next() {
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}
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return it.Error
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}
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// Tests that an empty state is not scheduled for syncing.
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func TestEmptyStateSync(t *testing.T) {
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empty := common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
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db, _ := ethdb.NewMemDatabase()
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if req := NewStateSync(empty, db).Missing(1); len(req) != 0 {
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t.Errorf("content requested for empty state: %v", req)
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}
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}
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// Tests that given a root hash, a state can sync iteratively on a single thread,
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// requesting retrieval tasks and returning all of them in one go.
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func TestIterativeStateSyncIndividual(t *testing.T) { testIterativeStateSync(t, 1) }
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func TestIterativeStateSyncBatched(t *testing.T) { testIterativeStateSync(t, 100) }
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func testIterativeStateSync(t *testing.T, batch int) {
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// Create a random state to copy
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srcDb, srcRoot, srcAccounts := makeTestState()
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// Create a destination state and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewStateSync(srcRoot, dstDb)
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queue := append([]common.Hash{}, sched.Missing(batch)...)
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for len(queue) > 0 {
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results := make([]trie.SyncResult, len(queue))
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for i, hash := range queue {
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data, err := srcDb.Get(hash.Bytes())
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if err != nil {
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t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
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}
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results[i] = trie.SyncResult{Hash: hash, Data: data}
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}
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if index, err := sched.Process(results); err != nil {
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t.Fatalf("failed to process result #%d: %v", index, err)
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}
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queue = append(queue[:0], sched.Missing(batch)...)
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}
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// Cross check that the two states are in sync
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checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
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}
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// Tests that the trie scheduler can correctly reconstruct the state even if only
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// partial results are returned, and the others sent only later.
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func TestIterativeDelayedStateSync(t *testing.T) {
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// Create a random state to copy
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srcDb, srcRoot, srcAccounts := makeTestState()
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// Create a destination state and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewStateSync(srcRoot, dstDb)
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queue := append([]common.Hash{}, sched.Missing(0)...)
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for len(queue) > 0 {
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// Sync only half of the scheduled nodes
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results := make([]trie.SyncResult, len(queue)/2+1)
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for i, hash := range queue[:len(results)] {
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data, err := srcDb.Get(hash.Bytes())
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if err != nil {
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t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
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}
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results[i] = trie.SyncResult{Hash: hash, Data: data}
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}
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if index, err := sched.Process(results); err != nil {
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t.Fatalf("failed to process result #%d: %v", index, err)
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}
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queue = append(queue[len(results):], sched.Missing(0)...)
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}
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// Cross check that the two states are in sync
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checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
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}
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// Tests that given a root hash, a trie can sync iteratively on a single thread,
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// requesting retrieval tasks and returning all of them in one go, however in a
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// random order.
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func TestIterativeRandomStateSyncIndividual(t *testing.T) { testIterativeRandomStateSync(t, 1) }
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func TestIterativeRandomStateSyncBatched(t *testing.T) { testIterativeRandomStateSync(t, 100) }
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func testIterativeRandomStateSync(t *testing.T, batch int) {
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// Create a random state to copy
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srcDb, srcRoot, srcAccounts := makeTestState()
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// Create a destination state and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewStateSync(srcRoot, dstDb)
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queue := make(map[common.Hash]struct{})
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for _, hash := range sched.Missing(batch) {
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queue[hash] = struct{}{}
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}
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for len(queue) > 0 {
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// Fetch all the queued nodes in a random order
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results := make([]trie.SyncResult, 0, len(queue))
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for hash, _ := range queue {
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data, err := srcDb.Get(hash.Bytes())
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if err != nil {
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t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
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}
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results = append(results, trie.SyncResult{Hash: hash, Data: data})
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}
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// Feed the retrieved results back and queue new tasks
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if index, err := sched.Process(results); err != nil {
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t.Fatalf("failed to process result #%d: %v", index, err)
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}
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queue = make(map[common.Hash]struct{})
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for _, hash := range sched.Missing(batch) {
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queue[hash] = struct{}{}
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}
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}
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// Cross check that the two states are in sync
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checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
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}
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// Tests that the trie scheduler can correctly reconstruct the state even if only
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// partial results are returned (Even those randomly), others sent only later.
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func TestIterativeRandomDelayedStateSync(t *testing.T) {
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// Create a random state to copy
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srcDb, srcRoot, srcAccounts := makeTestState()
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// Create a destination state and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewStateSync(srcRoot, dstDb)
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queue := make(map[common.Hash]struct{})
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for _, hash := range sched.Missing(0) {
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queue[hash] = struct{}{}
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}
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for len(queue) > 0 {
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// Sync only half of the scheduled nodes, even those in random order
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results := make([]trie.SyncResult, 0, len(queue)/2+1)
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for hash, _ := range queue {
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delete(queue, hash)
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data, err := srcDb.Get(hash.Bytes())
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if err != nil {
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t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
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}
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results = append(results, trie.SyncResult{Hash: hash, Data: data})
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if len(results) >= cap(results) {
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break
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}
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}
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// Feed the retrieved results back and queue new tasks
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if index, err := sched.Process(results); err != nil {
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t.Fatalf("failed to process result #%d: %v", index, err)
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}
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for _, hash := range sched.Missing(0) {
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queue[hash] = struct{}{}
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}
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}
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// Cross check that the two states are in sync
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checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
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}
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// Tests that at any point in time during a sync, only complete sub-tries are in
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// the database.
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func TestIncompleteStateSync(t *testing.T) {
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// Create a random state to copy
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srcDb, srcRoot, srcAccounts := makeTestState()
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// Create a destination state and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewStateSync(srcRoot, dstDb)
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added := []common.Hash{}
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queue := append([]common.Hash{}, sched.Missing(1)...)
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for len(queue) > 0 {
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// Fetch a batch of state nodes
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results := make([]trie.SyncResult, len(queue))
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for i, hash := range queue {
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data, err := srcDb.Get(hash.Bytes())
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if err != nil {
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t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
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}
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results[i] = trie.SyncResult{Hash: hash, Data: data}
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}
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// Process each of the state nodes
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if index, err := sched.Process(results); err != nil {
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t.Fatalf("failed to process result #%d: %v", index, err)
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}
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for _, result := range results {
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added = append(added, result.Hash)
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}
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// Check that all known sub-tries in the synced state is complete
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for _, root := range added {
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// Skim through the accounts and make sure the root hash is not a code node
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codeHash := false
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for _, acc := range srcAccounts {
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if bytes.Compare(root.Bytes(), crypto.Sha3(acc.code)) == 0 {
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codeHash = true
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break
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}
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}
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// If the root is a real trie node, check consistency
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if !codeHash {
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if err := checkStateConsistency(dstDb, root); err != nil {
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t.Fatalf("state inconsistent: %v", err)
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}
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}
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}
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// Fetch the next batch to retrieve
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queue = append(queue[:0], sched.Missing(1)...)
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}
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// Sanity check that removing any node from the database is detected
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for _, node := range added[1:] {
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key := node.Bytes()
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value, _ := dstDb.Get(key)
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dstDb.Delete(key)
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if err := checkStateConsistency(dstDb, added[0]); err == nil {
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t.Fatalf("trie inconsistency not caught, missing: %x", key)
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}
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dstDb.Put(key, value)
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}
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}
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