Official Go implementation of the Ethereum protocol
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go-ethereum/trie/tracer_test.go

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// Copyright 2022 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 trie
import (
"bytes"
"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/trie/trienode"
)
var (
tiny = []struct{ k, v string }{
{"k1", "v1"},
{"k2", "v2"},
{"k3", "v3"},
}
nonAligned = []struct{ k, v string }{
{"do", "verb"},
{"ether", "wookiedoo"},
{"horse", "stallion"},
{"shaman", "horse"},
{"doge", "coin"},
{"dog", "puppy"},
{"somethingveryoddindeedthis is", "myothernodedata"},
}
standard = []struct{ k, v string }{
{string(randBytes(32)), "verb"},
{string(randBytes(32)), "wookiedoo"},
{string(randBytes(32)), "stallion"},
{string(randBytes(32)), "horse"},
{string(randBytes(32)), "coin"},
{string(randBytes(32)), "puppy"},
{string(randBytes(32)), "myothernodedata"},
}
)
func TestTrieTracer(t *testing.T) {
testTrieTracer(t, tiny)
testTrieTracer(t, nonAligned)
testTrieTracer(t, standard)
}
// Tests if the trie diffs are tracked correctly. Tracer should capture
// all non-leaf dirty nodes, no matter the node is embedded or not.
func testTrieTracer(t *testing.T, vals []struct{ k, v string }) {
db := NewDatabase(rawdb.NewMemoryDatabase(), nil)
trie := NewEmpty(db)
// Determine all new nodes are tracked
for _, val := range vals {
trie.MustUpdate([]byte(val.k), []byte(val.v))
}
insertSet := copySet(trie.tracer.inserts) // copy before commit
deleteSet := copySet(trie.tracer.deletes) // copy before commit
root, nodes, _ := trie.Commit(false)
db.Update(root, types.EmptyRootHash, 0, trienode.NewWithNodeSet(nodes), nil)
seen := setKeys(iterNodes(db, root))
if !compareSet(insertSet, seen) {
t.Fatal("Unexpected insertion set")
}
if !compareSet(deleteSet, nil) {
t.Fatal("Unexpected deletion set")
}
// Determine all deletions are tracked
trie, _ = New(TrieID(root), db)
for _, val := range vals {
trie.MustDelete([]byte(val.k))
}
insertSet, deleteSet = copySet(trie.tracer.inserts), copySet(trie.tracer.deletes)
if !compareSet(insertSet, nil) {
t.Fatal("Unexpected insertion set")
}
if !compareSet(deleteSet, seen) {
t.Fatal("Unexpected deletion set")
}
}
// Test that after inserting a new batch of nodes and deleting them immediately,
// the trie tracer should be cleared normally as no operation happened.
func TestTrieTracerNoop(t *testing.T) {
testTrieTracerNoop(t, tiny)
testTrieTracerNoop(t, nonAligned)
testTrieTracerNoop(t, standard)
}
func testTrieTracerNoop(t *testing.T, vals []struct{ k, v string }) {
trie := NewEmpty(NewDatabase(rawdb.NewMemoryDatabase(), nil))
for _, val := range vals {
trie.MustUpdate([]byte(val.k), []byte(val.v))
}
for _, val := range vals {
trie.MustDelete([]byte(val.k))
}
if len(trie.tracer.inserts) != 0 {
t.Fatal("Unexpected insertion set")
}
if len(trie.tracer.deletes) != 0 {
t.Fatal("Unexpected deletion set")
}
}
// Tests if the accessList is correctly tracked.
func TestAccessList(t *testing.T) {
testAccessList(t, tiny)
testAccessList(t, nonAligned)
testAccessList(t, standard)
}
func testAccessList(t *testing.T, vals []struct{ k, v string }) {
var (
db = NewDatabase(rawdb.NewMemoryDatabase(), nil)
trie = NewEmpty(db)
orig = trie.Copy()
)
// Create trie from scratch
for _, val := range vals {
trie.MustUpdate([]byte(val.k), []byte(val.v))
}
root, nodes, _ := trie.Commit(false)
db.Update(root, types.EmptyRootHash, 0, trienode.NewWithNodeSet(nodes), nil)
trie, _ = New(TrieID(root), db)
if err := verifyAccessList(orig, trie, nodes); err != nil {
t.Fatalf("Invalid accessList %v", err)
}
// Update trie
parent := root
trie, _ = New(TrieID(root), db)
orig = trie.Copy()
for _, val := range vals {
trie.MustUpdate([]byte(val.k), randBytes(32))
}
root, nodes, _ = trie.Commit(false)
db.Update(root, parent, 0, trienode.NewWithNodeSet(nodes), nil)
trie, _ = New(TrieID(root), db)
if err := verifyAccessList(orig, trie, nodes); err != nil {
t.Fatalf("Invalid accessList %v", err)
}
// Add more new nodes
parent = root
trie, _ = New(TrieID(root), db)
orig = trie.Copy()
var keys []string
for i := 0; i < 30; i++ {
key := randBytes(32)
keys = append(keys, string(key))
trie.MustUpdate(key, randBytes(32))
}
root, nodes, _ = trie.Commit(false)
db.Update(root, parent, 0, trienode.NewWithNodeSet(nodes), nil)
trie, _ = New(TrieID(root), db)
if err := verifyAccessList(orig, trie, nodes); err != nil {
t.Fatalf("Invalid accessList %v", err)
}
// Partial deletions
parent = root
trie, _ = New(TrieID(root), db)
orig = trie.Copy()
for _, key := range keys {
trie.MustUpdate([]byte(key), nil)
}
root, nodes, _ = trie.Commit(false)
db.Update(root, parent, 0, trienode.NewWithNodeSet(nodes), nil)
trie, _ = New(TrieID(root), db)
if err := verifyAccessList(orig, trie, nodes); err != nil {
t.Fatalf("Invalid accessList %v", err)
}
// Delete all
parent = root
trie, _ = New(TrieID(root), db)
orig = trie.Copy()
for _, val := range vals {
trie.MustUpdate([]byte(val.k), nil)
}
root, nodes, _ = trie.Commit(false)
db.Update(root, parent, 0, trienode.NewWithNodeSet(nodes), nil)
trie, _ = New(TrieID(root), db)
if err := verifyAccessList(orig, trie, nodes); err != nil {
t.Fatalf("Invalid accessList %v", err)
}
}
// Tests origin values won't be tracked in Iterator or Prover
func TestAccessListLeak(t *testing.T) {
var (
db = NewDatabase(rawdb.NewMemoryDatabase(), nil)
trie = NewEmpty(db)
)
// Create trie from scratch
for _, val := range standard {
trie.MustUpdate([]byte(val.k), []byte(val.v))
}
root, nodes, _ := trie.Commit(false)
db.Update(root, types.EmptyRootHash, 0, trienode.NewWithNodeSet(nodes), nil)
var cases = []struct {
op func(tr *Trie)
}{
{
func(tr *Trie) {
it := tr.MustNodeIterator(nil)
for it.Next(true) {
}
},
},
{
func(tr *Trie) {
it := NewIterator(tr.MustNodeIterator(nil))
for it.Next() {
}
},
},
{
func(tr *Trie) {
for _, val := range standard {
tr.Prove([]byte(val.k), rawdb.NewMemoryDatabase())
}
},
},
}
for _, c := range cases {
trie, _ = New(TrieID(root), db)
n1 := len(trie.tracer.accessList)
c.op(trie)
n2 := len(trie.tracer.accessList)
if n1 != n2 {
t.Fatalf("AccessList is leaked, prev %d after %d", n1, n2)
}
}
}
// Tests whether the original tree node is correctly deleted after being embedded
// in its parent due to the smaller size of the original tree node.
func TestTinyTree(t *testing.T) {
var (
db = NewDatabase(rawdb.NewMemoryDatabase(), nil)
trie = NewEmpty(db)
)
for _, val := range tiny {
trie.MustUpdate([]byte(val.k), randBytes(32))
}
root, set, _ := trie.Commit(false)
db.Update(root, types.EmptyRootHash, 0, trienode.NewWithNodeSet(set), nil)
parent := root
trie, _ = New(TrieID(root), db)
orig := trie.Copy()
for _, val := range tiny {
trie.MustUpdate([]byte(val.k), []byte(val.v))
}
root, set, _ = trie.Commit(false)
db.Update(root, parent, 0, trienode.NewWithNodeSet(set), nil)
trie, _ = New(TrieID(root), db)
if err := verifyAccessList(orig, trie, set); err != nil {
t.Fatalf("Invalid accessList %v", err)
}
}
func compareSet(setA, setB map[string]struct{}) bool {
if len(setA) != len(setB) {
return false
}
for key := range setA {
if _, ok := setB[key]; !ok {
return false
}
}
return true
}
func forNodes(tr *Trie) map[string][]byte {
var (
it = tr.MustNodeIterator(nil)
nodes = make(map[string][]byte)
)
for it.Next(true) {
if it.Leaf() {
continue
}
nodes[string(it.Path())] = common.CopyBytes(it.NodeBlob())
}
return nodes
}
func iterNodes(db *Database, root common.Hash) map[string][]byte {
tr, _ := New(TrieID(root), db)
return forNodes(tr)
}
func forHashedNodes(tr *Trie) map[string][]byte {
var (
it = tr.MustNodeIterator(nil)
nodes = make(map[string][]byte)
)
for it.Next(true) {
if it.Hash() == (common.Hash{}) {
continue
}
nodes[string(it.Path())] = common.CopyBytes(it.NodeBlob())
}
return nodes
}
func diffTries(trieA, trieB *Trie) (map[string][]byte, map[string][]byte, map[string][]byte) {
var (
nodesA = forHashedNodes(trieA)
nodesB = forHashedNodes(trieB)
inA = make(map[string][]byte) // hashed nodes in trie a but not b
inB = make(map[string][]byte) // hashed nodes in trie b but not a
both = make(map[string][]byte) // hashed nodes in both tries but different value
)
for path, blobA := range nodesA {
if blobB, ok := nodesB[path]; ok {
if bytes.Equal(blobA, blobB) {
continue
}
both[path] = blobA
continue
}
inA[path] = blobA
}
for path, blobB := range nodesB {
if _, ok := nodesA[path]; ok {
continue
}
inB[path] = blobB
}
return inA, inB, both
}
func setKeys(set map[string][]byte) map[string]struct{} {
keys := make(map[string]struct{})
for k := range set {
keys[k] = struct{}{}
}
return keys
}
func copySet(set map[string]struct{}) map[string]struct{} {
copied := make(map[string]struct{})
for k := range set {
copied[k] = struct{}{}
}
return copied
}