mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
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4047ccad2f
The 'step' method is split into two parts, 'peek' and 'push'. peek returns the next state but doesn't make it current. The end of iteration was previously tracked by setting 'trie' to nil. End of iteration is now tracked using the 'iteratorEnd' error, which is slightly cleaner and requires less code.
334 lines
11 KiB
Go
334 lines
11 KiB
Go
// 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 trie
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import (
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"bytes"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/ethdb"
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)
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// makeTestTrie create a sample test trie to test node-wise reconstruction.
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func makeTestTrie() (ethdb.Database, *Trie, map[string][]byte) {
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// Create an empty trie
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db, _ := ethdb.NewMemDatabase()
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trie, _ := New(common.Hash{}, db)
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// Fill it with some arbitrary data
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content := make(map[string][]byte)
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for i := byte(0); i < 255; i++ {
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// Map the same data under multiple keys
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key, val := common.LeftPadBytes([]byte{1, i}, 32), []byte{i}
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content[string(key)] = val
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trie.Update(key, val)
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key, val = common.LeftPadBytes([]byte{2, i}, 32), []byte{i}
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content[string(key)] = val
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trie.Update(key, val)
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// Add some other data to inflate th trie
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for j := byte(3); j < 13; j++ {
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key, val = common.LeftPadBytes([]byte{j, i}, 32), []byte{j, i}
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content[string(key)] = val
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trie.Update(key, val)
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}
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}
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trie.Commit()
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// Return the generated trie
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return db, trie, content
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}
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// checkTrieContents cross references a reconstructed trie with an expected data
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// content map.
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func checkTrieContents(t *testing.T, db Database, root []byte, content map[string][]byte) {
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// Check root availability and trie contents
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trie, err := New(common.BytesToHash(root), db)
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if err != nil {
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t.Fatalf("failed to create trie at %x: %v", root, err)
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}
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if err := checkTrieConsistency(db, common.BytesToHash(root)); err != nil {
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t.Fatalf("inconsistent trie at %x: %v", root, err)
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}
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for key, val := range content {
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if have := trie.Get([]byte(key)); !bytes.Equal(have, val) {
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t.Errorf("entry %x: content mismatch: have %x, want %x", key, have, val)
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}
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}
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}
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// checkTrieConsistency checks that all nodes in a trie are indeed present.
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func checkTrieConsistency(db Database, root common.Hash) error {
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// Create and iterate a trie rooted in a subnode
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trie, err := New(root, db)
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if err != nil {
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return nil // // Consider a non existent state consistent
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}
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it := trie.NodeIterator(nil)
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for it.Next(true) {
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}
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return it.Error()
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}
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// Tests that an empty trie is not scheduled for syncing.
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func TestEmptyTrieSync(t *testing.T) {
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emptyA, _ := New(common.Hash{}, nil)
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emptyB, _ := New(emptyRoot, nil)
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for i, trie := range []*Trie{emptyA, emptyB} {
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db, _ := ethdb.NewMemDatabase()
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if req := NewTrieSync(common.BytesToHash(trie.Root()), db, nil).Missing(1); len(req) != 0 {
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t.Errorf("test %d: content requested for empty trie: %v", i, req)
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}
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}
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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.
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func TestIterativeTrieSyncIndividual(t *testing.T) { testIterativeTrieSync(t, 1) }
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func TestIterativeTrieSyncBatched(t *testing.T) { testIterativeTrieSync(t, 100) }
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func testIterativeTrieSync(t *testing.T, batch int) {
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// Create a random trie to copy
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srcDb, srcTrie, srcData := makeTestTrie()
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// Create a destination trie and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewTrieSync(common.BytesToHash(srcTrie.Root()), dstDb, nil)
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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([]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] = SyncResult{hash, data}
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}
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if _, index, err := sched.Process(results, dstDb); 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 tries are in sync
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checkTrieContents(t, dstDb, srcTrie.Root(), srcData)
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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 TestIterativeDelayedTrieSync(t *testing.T) {
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// Create a random trie to copy
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srcDb, srcTrie, srcData := makeTestTrie()
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// Create a destination trie and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewTrieSync(common.BytesToHash(srcTrie.Root()), dstDb, nil)
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queue := append([]common.Hash{}, sched.Missing(10000)...)
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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([]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] = SyncResult{hash, data}
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}
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if _, index, err := sched.Process(results, dstDb); 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(10000)...)
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}
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// Cross check that the two tries are in sync
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checkTrieContents(t, dstDb, srcTrie.Root(), srcData)
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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 TestIterativeRandomTrieSyncIndividual(t *testing.T) { testIterativeRandomTrieSync(t, 1) }
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func TestIterativeRandomTrieSyncBatched(t *testing.T) { testIterativeRandomTrieSync(t, 100) }
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func testIterativeRandomTrieSync(t *testing.T, batch int) {
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// Create a random trie to copy
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srcDb, srcTrie, srcData := makeTestTrie()
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// Create a destination trie and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewTrieSync(common.BytesToHash(srcTrie.Root()), dstDb, nil)
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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([]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, SyncResult{hash, 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, dstDb); 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 tries are in sync
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checkTrieContents(t, dstDb, srcTrie.Root(), srcData)
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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 TestIterativeRandomDelayedTrieSync(t *testing.T) {
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// Create a random trie to copy
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srcDb, srcTrie, srcData := makeTestTrie()
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// Create a destination trie and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewTrieSync(common.BytesToHash(srcTrie.Root()), dstDb, nil)
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queue := make(map[common.Hash]struct{})
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for _, hash := range sched.Missing(10000) {
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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([]SyncResult, 0, len(queue)/2+1)
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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, SyncResult{hash, 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, dstDb); 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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delete(queue, result.Hash)
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}
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for _, hash := range sched.Missing(10000) {
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queue[hash] = struct{}{}
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}
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}
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// Cross check that the two tries are in sync
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checkTrieContents(t, dstDb, srcTrie.Root(), srcData)
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}
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// Tests that a trie sync will not request nodes multiple times, even if they
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// have such references.
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func TestDuplicateAvoidanceTrieSync(t *testing.T) {
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// Create a random trie to copy
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srcDb, srcTrie, srcData := makeTestTrie()
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// Create a destination trie and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewTrieSync(common.BytesToHash(srcTrie.Root()), dstDb, nil)
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queue := append([]common.Hash{}, sched.Missing(0)...)
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requested := make(map[common.Hash]struct{})
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for len(queue) > 0 {
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results := make([]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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if _, ok := requested[hash]; ok {
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t.Errorf("hash %x already requested once", hash)
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}
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requested[hash] = struct{}{}
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results[i] = SyncResult{hash, data}
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}
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if _, index, err := sched.Process(results, dstDb); 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(0)...)
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}
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// Cross check that the two tries are in sync
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checkTrieContents(t, dstDb, srcTrie.Root(), srcData)
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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 TestIncompleteTrieSync(t *testing.T) {
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// Create a random trie to copy
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srcDb, srcTrie, _ := makeTestTrie()
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// Create a destination trie and sync with the scheduler
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dstDb, _ := ethdb.NewMemDatabase()
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sched := NewTrieSync(common.BytesToHash(srcTrie.Root()), dstDb, nil)
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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 trie nodes
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results := make([]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] = SyncResult{hash, data}
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}
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// Process each of the trie nodes
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if _, index, err := sched.Process(results, dstDb); 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 trie is complete
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for _, root := range added {
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if err := checkTrieConsistency(dstDb, root); err != nil {
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t.Fatalf("trie inconsistent: %v", err)
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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 := checkTrieConsistency(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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