1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
// 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/ethdb"
"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() (ethdb.Database, common.Hash, []*testAccount) {
// Create an empty state
db, _ := ethdb.NewMemDatabase()
state := New(common.Hash{}, db)
// Fill it with some arbitrary data
accounts := []*testAccount{}
for i := byte(0); i < 255; 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([]byte{i, i, i, i, i})
acc.code = []byte{i, i, i, i, i}
}
state.UpdateStateObject(obj)
accounts = append(accounts, acc)
}
root, _ := state.Commit()
// 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) {
state := New(root, db)
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.Compare(code, acc.code) != 0 {
t.Errorf("account %d: code mismatch: have %x, want %x", i, code, acc.code)
}
}
}
// Tests that an empty state is not scheduled for syncing.
func TestEmptyStateSync(t *testing.T) {
empty := common.HexToHash("56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421")
db, _ := ethdb.NewMemDatabase()
if req := NewStateSync(empty, db).Missing(1); len(req) != 0 {
t.Errorf("content requested for empty state: %v", req)
}
}
// 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) }
func TestIterativeStateSyncBatched(t *testing.T) { testIterativeStateSync(t, 100) }
func testIterativeStateSync(t *testing.T, batch int) {
// Create a random state to copy
srcDb, srcRoot, srcAccounts := makeTestState()
// Create a destination state and sync with the scheduler
dstDb, _ := ethdb.NewMemDatabase()
sched := NewStateSync(srcRoot, dstDb)
queue := append([]common.Hash{}, sched.Missing(batch)...)
for len(queue) > 0 {
results := make([]trie.SyncResult, len(queue))
for i, hash := range queue {
data, err := srcDb.Get(hash.Bytes())
if err != nil {
t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
}
results[i] = trie.SyncResult{hash, data}
}
if err := sched.Process(results); err != nil {
t.Fatalf("failed to process results: %v", err)
}
queue = append(queue[:0], sched.Missing(batch)...)
}
// 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, _ := ethdb.NewMemDatabase()
sched := NewStateSync(srcRoot, dstDb)
queue := append([]common.Hash{}, sched.Missing(0)...)
for len(queue) > 0 {
// Sync only half of the scheduled nodes
results := make([]trie.SyncResult, len(queue)/2+1)
for i, hash := range queue[:len(results)] {
data, err := srcDb.Get(hash.Bytes())
if err != nil {
t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
}
results[i] = trie.SyncResult{hash, data}
}
if err := sched.Process(results); err != nil {
t.Fatalf("failed to process results: %v", err)
}
queue = append(queue[len(results):], sched.Missing(0)...)
}
// 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, batch int) {
// Create a random state to copy
srcDb, srcRoot, srcAccounts := makeTestState()
// Create a destination state and sync with the scheduler
dstDb, _ := ethdb.NewMemDatabase()
sched := NewStateSync(srcRoot, dstDb)
queue := make(map[common.Hash]struct{})
for _, hash := range sched.Missing(batch) {
queue[hash] = struct{}{}
}
for len(queue) > 0 {
// Fetch all the queued nodes in a random order
results := make([]trie.SyncResult, 0, len(queue))
for hash, _ := range queue {
data, err := srcDb.Get(hash.Bytes())
if err != nil {
t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
}
results = append(results, trie.SyncResult{hash, data})
}
// Feed the retrieved results back and queue new tasks
if err := sched.Process(results); err != nil {
t.Fatalf("failed to process results: %v", err)
}
queue = make(map[common.Hash]struct{})
for _, hash := range sched.Missing(batch) {
queue[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, _ := ethdb.NewMemDatabase()
sched := NewStateSync(srcRoot, dstDb)
queue := make(map[common.Hash]struct{})
for _, hash := range sched.Missing(0) {
queue[hash] = struct{}{}
}
for len(queue) > 0 {
// Sync only half of the scheduled nodes, even those in random order
results := make([]trie.SyncResult, 0, len(queue)/2+1)
for hash, _ := range queue {
delete(queue, hash)
data, err := srcDb.Get(hash.Bytes())
if err != nil {
t.Fatalf("failed to retrieve node data for %x: %v", hash, err)
}
results = append(results, trie.SyncResult{hash, data})
if len(results) >= cap(results) {
break
}
}
// Feed the retrieved results back and queue new tasks
if err := sched.Process(results); err != nil {
t.Fatalf("failed to process results: %v", err)
}
for _, hash := range sched.Missing(0) {
queue[hash] = struct{}{}
}
}
// Cross check that the two states are in sync
checkStateAccounts(t, dstDb, srcRoot, srcAccounts)
}
|
