// Copyright 2018 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 rawdb
import (
"bytes"
"errors"
"fmt"
"os"
"time"
"github.com/ava-labs/go-ethereum/common"
"github.com/ava-labs/go-ethereum/ethdb"
"github.com/ava-labs/go-ethereum/ethdb/leveldb"
"github.com/ava-labs/go-ethereum/ethdb/memorydb"
"github.com/ava-labs/go-ethereum/log"
"github.com/olekukonko/tablewriter"
)
// freezerdb is a database wrapper that enabled freezer data retrievals.
type freezerdb struct {
ethdb.KeyValueStore
ethdb.AncientStore
}
// Close implements io.Closer, closing both the fast key-value store as well as
// the slow ancient tables.
func (frdb *freezerdb) Close() error {
var errs []error
if err := frdb.KeyValueStore.Close(); err != nil {
errs = append(errs, err)
}
if err := frdb.AncientStore.Close(); err != nil {
errs = append(errs, err)
}
if len(errs) != 0 {
return fmt.Errorf("%v", errs)
}
return nil
}
// nofreezedb is a database wrapper that disables freezer data retrievals.
type nofreezedb struct {
ethdb.KeyValueStore
}
// HasAncient returns an error as we don't have a backing chain freezer.
func (db *nofreezedb) HasAncient(kind string, number uint64) (bool, error) {
return false, errNotSupported
}
// Ancient returns an error as we don't have a backing chain freezer.
func (db *nofreezedb) Ancient(kind string, number uint64) ([]byte, error) {
return nil, errNotSupported
}
// Ancients returns an error as we don't have a backing chain freezer.
func (db *nofreezedb) Ancients() (uint64, error) {
return 0, errNotSupported
}
// AncientSize returns an error as we don't have a backing chain freezer.
func (db *nofreezedb) AncientSize(kind string) (uint64, error) {
return 0, errNotSupported
}
// AppendAncient returns an error as we don't have a backing chain freezer.
func (db *nofreezedb) AppendAncient(number uint64, hash, header, body, receipts, td []byte) error {
return errNotSupported
}
// TruncateAncients returns an error as we don't have a backing chain freezer.
func (db *nofreezedb) TruncateAncients(items uint64) error {
return errNotSupported
}
// Sync returns an error as we don't have a backing chain freezer.
func (db *nofreezedb) Sync() error {
return errNotSupported
}
// NewDatabase creates a high level database on top of a given key-value data
// store without a freezer moving immutable chain segments into cold storage.
func NewDatabase(db ethdb.KeyValueStore) ethdb.Database {
return &nofreezedb{
KeyValueStore: db,
}
}
// NewDatabaseWithFreezer creates a high level database on top of a given key-
// value data store with a freezer moving immutable chain segments into cold
// storage.
func NewDatabaseWithFreezer(db ethdb.KeyValueStore, freezer string, namespace string) (ethdb.Database, error) {
// Create the idle freezer instance
frdb, err := newFreezer(freezer, namespace)
if err != nil {
return nil, err
}
// Since the freezer can be stored separately from the user's key-value database,
// there's a fairly high probability that the user requests invalid combinations
// of the freezer and database. Ensure that we don't shoot ourselves in the foot
// by serving up conflicting data, leading to both datastores getting corrupted.
//
// - If both the freezer and key-value store is empty (no genesis), we just
// initialized a new empty freezer, so everything's fine.
// - If the key-value store is empty, but the freezer is not, we need to make
// sure the user's genesis matches the freezer. That will be checked in the
// blockchain, since we don't have the genesis block here (nor should we at
// this point care, the key-value/freezer combo is valid).
// - If neither the key-value store nor the freezer is empty, cross validate
// the genesis hashes to make sure they are compatible. If they are, also
// ensure that there's no gap between the freezer and sunsequently leveldb.
// - If the key-value store is not empty, but the freezer is we might just be
// upgrading to the freezer release, or we might have had a small chain and
// not frozen anything yet. Ensure that no blocks are missing yet from the
// key-value store, since that would mean we already had an old freezer.
// If the genesis hash is empty, we have a new key-value store, so nothing to
// validate in this method. If, however, the genesis hash is not nil, compare
// it to the freezer content.
if kvgenesis, _ := db.Get(headerHashKey(0)); len(kvgenesis) > 0 {
if frozen, _ := frdb.Ancients(); frozen > 0 {
// If the freezer already contains something, ensure that the genesis blocks
// match, otherwise we might mix up freezers across chains and destroy both
// the freezer and the key-value store.
if frgenesis, _ := frdb.Ancient(freezerHashTable, 0); !bytes.Equal(kvgenesis, frgenesis) {
return nil, fmt.Errorf("genesis mismatch: %#x (leveldb) != %#x (ancients)", kvgenesis, frgenesis)
}
// Key-value store and freezer belong to the same network. Ensure that they
// are contiguous, otherwise we might end up with a non-functional freezer.
if kvhash, _ := db.Get(headerHashKey(frozen)); len(kvhash) == 0 {
// Subsequent header after the freezer limit is missing from the database.
// Reject startup is the database has a more recent head.
if *ReadHeaderNumber(db, ReadHeadHeaderHash(db)) > frozen-1 {
return nil, fmt.Errorf("gap (#%d) in the chain between ancients and leveldb", frozen)
}
// Database contains only older data than the freezer, this happens if the
// state was wiped and reinited from an existing freezer.
} else {
// Key-value store continues where the freezer left off, all is fine. We might
// have duplicate blocks (crash after freezer write but before kay-value store
// deletion, but that's fine).
}
} else {
// If the freezer is empty, ensure nothing was moved yet from the key-value
// store, otherwise we'll end up missing data. We check block #1 to decide
// if we froze anything previously or not, but do take care of databases with
// only the genesis block.
if ReadHeadHeaderHash(db) != common.BytesToHash(kvgenesis) {
// Key-value store contains more data than the genesis block, make sure we
// didn't freeze anything yet.
if kvblob, _ := db.Get(headerHashKey(1)); len(kvblob) == 0 {
return nil, errors.New("ancient chain segments already extracted, please set --datadir.ancient to the correct path")
}
// Block #1 is still in the database, we're allowed to init a new feezer
} else {
// The head header is still the genesis, we're allowed to init a new feezer
}
}
}
// Freezer is consistent with the key-value database, permit combining the two
go frdb.freeze(db)
return &freezerdb{
KeyValueStore: db,
AncientStore: frdb,
}, nil
}
// NewMemoryDatabase creates an ephemeral in-memory key-value database without a
// freezer moving immutable chain segments into cold storage.
func NewMemoryDatabase() ethdb.Database {
return NewDatabase(memorydb.New())
}
// NewMemoryDatabaseWithCap creates an ephemeral in-memory key-value database
// with an initial starting capacity, but without a freezer moving immutable
// chain segments into cold storage.
func NewMemoryDatabaseWithCap(size int) ethdb.Database {
return NewDatabase(memorydb.NewWithCap(size))
}
// NewLevelDBDatabase creates a persistent key-value database without a freezer
// moving immutable chain segments into cold storage.
func NewLevelDBDatabase(file string, cache int, handles int, namespace string) (ethdb.Database, error) {
db, err := leveldb.New(file, cache, handles, namespace)
if err != nil {
return nil, err
}
return NewDatabase(db), nil
}
// NewLevelDBDatabaseWithFreezer creates a persistent key-value database with a
// freezer moving immutable chain segments into cold storage.
func NewLevelDBDatabaseWithFreezer(file string, cache int, handles int, freezer string, namespace string) (ethdb.Database, error) {
kvdb, err := leveldb.New(file, cache, handles, namespace)
if err != nil {
return nil, err
}
frdb, err := NewDatabaseWithFreezer(kvdb, freezer, namespace)
if err != nil {
kvdb.Close()
return nil, err
}
return frdb, nil
}
// InspectDatabase traverses the entire database and checks the size
// of all different categories of data.
func InspectDatabase(db ethdb.Database) error {
it := db.NewIterator()
defer it.Release()
var (
count int64
start = time.Now()
logged = time.Now()
// Key-value store statistics
total common.StorageSize
headerSize common.StorageSize
bodySize common.StorageSize
receiptSize common.StorageSize
tdSize common.StorageSize
numHashPairing common.StorageSize
hashNumPairing common.StorageSize
trieSize common.StorageSize
txlookupSize common.StorageSize
preimageSize common.StorageSize
bloomBitsSize common.StorageSize
cliqueSnapsSize common.StorageSize
// Ancient store statistics
ancientHeaders common.StorageSize
ancientBodies common.StorageSize
ancientReceipts common.StorageSize
ancientHashes common.StorageSize
ancientTds common.StorageSize
// Les statistic
chtTrieNodes common.StorageSize
bloomTrieNodes common.StorageSize
// Meta- and unaccounted data
metadata common.StorageSize
unaccounted common.StorageSize
)
// Inspect key-value database first.
for it.Next() {
var (
key = it.Key()
size = common.StorageSize(len(key) + len(it.Value()))
)
total += size
switch {
case bytes.HasPrefix(key, headerPrefix) && bytes.HasSuffix(key, headerTDSuffix):
tdSize += size
case bytes.HasPrefix(key, headerPrefix) && bytes.HasSuffix(key, headerHashSuffix):
numHashPairing += size
case bytes.HasPrefix(key, headerPrefix) && len(key) == (len(headerPrefix)+8+common.HashLength):
headerSize += size
case bytes.HasPrefix(key, headerNumberPrefix) && len(key) == (len(headerNumberPrefix)+common