76eed9e50d
* core/state/snapshot: basic trie-to-hash implementation * tests: validate snapshot after test * core/state/snapshot: fix review concerns
115 lines
3.3 KiB
Go
115 lines
3.3 KiB
Go
// Copyright 2020 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 snapshot
|
|
|
|
import (
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/ethdb/memorydb"
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/rlp"
|
|
"github.com/ethereum/go-ethereum/trie"
|
|
)
|
|
|
|
// conversionAccount is used for converting between full and slim format. When
|
|
// doing this, we can consider 'balance' as a byte array, as it has already
|
|
// been converted from big.Int into an rlp-byteslice.
|
|
type conversionAccount struct {
|
|
Nonce uint64
|
|
Balance []byte
|
|
Root []byte
|
|
CodeHash []byte
|
|
}
|
|
|
|
// SlimToFull converts data on the 'slim RLP' format into the full RLP-format
|
|
func SlimToFull(data []byte) ([]byte, error) {
|
|
acc := &conversionAccount{}
|
|
if err := rlp.DecodeBytes(data, acc); err != nil {
|
|
return nil, err
|
|
}
|
|
if len(acc.Root) == 0 {
|
|
acc.Root = emptyRoot[:]
|
|
}
|
|
if len(acc.CodeHash) == 0 {
|
|
acc.CodeHash = emptyCode[:]
|
|
}
|
|
fullData, err := rlp.EncodeToBytes(acc)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return fullData, nil
|
|
}
|
|
|
|
// trieKV represents a trie key-value pair
|
|
type trieKV struct {
|
|
key common.Hash
|
|
value []byte
|
|
}
|
|
|
|
type trieGeneratorFn func(in chan (trieKV), out chan (common.Hash))
|
|
|
|
// GenerateTrieRoot takes an account iterator and reproduces the root hash.
|
|
func GenerateTrieRoot(it AccountIterator) common.Hash {
|
|
return generateTrieRoot(it, stdGenerate)
|
|
}
|
|
|
|
func generateTrieRoot(it AccountIterator, generatorFn trieGeneratorFn) common.Hash {
|
|
var (
|
|
in = make(chan trieKV) // chan to pass leaves
|
|
out = make(chan common.Hash) // chan to collect result
|
|
wg sync.WaitGroup
|
|
)
|
|
wg.Add(1)
|
|
go func() {
|
|
generatorFn(in, out)
|
|
wg.Done()
|
|
}()
|
|
// Feed leaves
|
|
start := time.Now()
|
|
logged := time.Now()
|
|
accounts := 0
|
|
for it.Next() {
|
|
slimData := it.Account()
|
|
fullData, _ := SlimToFull(slimData)
|
|
l := trieKV{it.Hash(), fullData}
|
|
in <- l
|
|
if time.Since(logged) > 8*time.Second {
|
|
log.Info("Generating trie hash from snapshot",
|
|
"at", l.key, "accounts", accounts, "elapsed", time.Since(start))
|
|
logged = time.Now()
|
|
}
|
|
accounts++
|
|
}
|
|
close(in)
|
|
result := <-out
|
|
log.Info("Generated trie hash from snapshot", "accounts", accounts, "elapsed", time.Since(start))
|
|
wg.Wait()
|
|
return result
|
|
}
|
|
|
|
// stdGenerate is a very basic hexary trie builder which uses the same Trie
|
|
// as the rest of geth, with no enhancements or optimizations
|
|
func stdGenerate(in chan (trieKV), out chan (common.Hash)) {
|
|
t, _ := trie.New(common.Hash{}, trie.NewDatabase(memorydb.New()))
|
|
for leaf := range in {
|
|
t.TryUpdate(leaf.key[:], leaf.value)
|
|
}
|
|
out <- t.Hash()
|
|
}
|