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# eth-pg-ipfs-state-snapshot
> Tool for extracting the entire Ethereum state at a particular from leveldb into Postgres-backed IPFS
[![Go Report Card](https://goreportcard.com/badge/github.com/vulcanize/eth-pg-ipfs-state-snapshot)](https://goreportcard.com/report/github.com/vulcanize/eth-pg-ipfs-state-snapshot)

114
cmd/root.go Normal file
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// VulcanizeDB
// Copyright © 2019 Vulcanize
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program 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 Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"fmt"
"os"
"strings"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
var (
cfgFile string
subCommand string
logWithCommand log.Entry
)
var rootCmd = &cobra.Command{
Use: "eth-pg-ipfs-state-snapshot",
PersistentPreRun: initFuncs,
}
func Execute() {
log.Info("----- Starting vDB -----")
if err := rootCmd.Execute(); err != nil {
log.Fatal(err)
}
}
func initFuncs(cmd *cobra.Command, args []string) {
logfile := viper.GetString("logfile")
if logfile != "" {
file, err := os.OpenFile(logfile,
os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
if err == nil {
log.Infof("Directing output to %s", logfile)
log.SetOutput(file)
} else {
log.SetOutput(os.Stdout)
log.Info("Failed to log to file, using default stdout")
}
} else {
log.SetOutput(os.Stdout)
}
if err := logLevel(); err != nil {
log.Fatal("Could not set log level: ", err)
}
}
func logLevel() error {
lvl, err := log.ParseLevel(viper.GetString("log.level"))
if err != nil {
return err
}
log.SetLevel(lvl)
if lvl > log.InfoLevel {
log.SetReportCaller(true)
}
log.Info("Log level set to ", lvl.String())
return nil
}
func init() {
cobra.OnInitialize(initConfig)
viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
viper.AutomaticEnv()
rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file location")
rootCmd.PersistentFlags().String("logfile", "", "file path for logging")
rootCmd.PersistentFlags().String("database-name", "vulcanize_public", "database name")
rootCmd.PersistentFlags().Int("database-port", 5432, "database port")
rootCmd.PersistentFlags().String("database-hostname", "localhost", "database hostname")
rootCmd.PersistentFlags().String("database-user", "", "database user")
rootCmd.PersistentFlags().String("database-password", "", "database password")
rootCmd.PersistentFlags().String("log-level", log.InfoLevel.String(), "Log level (trace, debug, info, warn, error, fatal, panic")
viper.BindPFlag("logfile", rootCmd.PersistentFlags().Lookup("logfile"))
viper.BindPFlag("database.name", rootCmd.PersistentFlags().Lookup("database-name"))
viper.BindPFlag("database.port", rootCmd.PersistentFlags().Lookup("database-port"))
viper.BindPFlag("database.hostname", rootCmd.PersistentFlags().Lookup("database-hostname"))
viper.BindPFlag("database.user", rootCmd.PersistentFlags().Lookup("database-user"))
viper.BindPFlag("database.password", rootCmd.PersistentFlags().Lookup("database-password"))
viper.BindPFlag("log.level", rootCmd.PersistentFlags().Lookup("log-level"))
}
func initConfig() {
if cfgFile != "" {
viper.SetConfigFile(cfgFile)
if err := viper.ReadInConfig(); err == nil {
log.Printf("Using config file: %s", viper.ConfigFileUsed())
} else {
log.Fatal(fmt.Sprintf("Couldn't read config file: %s", err.Error()))
}
} else {
log.Warn("No config file passed with --config flag")
}
}

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cmd/stateSnapshot.go Normal file
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// Copyright © 2020 Vulcanize, Inc
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"github.com/ethereum/go-ethereum/common"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/vulcanize/eth-pg-ipfs-state-snapshot/pkg/snapshot"
)
// stateSnapshotCmd represents the stateSnapshot command
var stateSnapshotCmd = &cobra.Command{
Use: "stateSnapshot",
Short: "Extract the entire Ethereum state from leveldb and publish into PG-IPFS",
Long: `A longer description that spans multiple lines and likely contains examples
and usage of using your command. For example:
Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
Run: func(cmd *cobra.Command, args []string) {
subCommand = cmd.CalledAs()
logWithCommand = *logrus.WithField("SubCommand", subCommand)
stateSnapshot()
},
}
func stateSnapshot() {
snapConfig := snapshot.Config{}
snapConfig.Init()
snapshotService, err := snapshot.NewSnapshotService(snapConfig)
if err != nil {
logWithCommand.Fatal(err)
}
height := viper.Get("snapshot.blockHeight")
uHeight, ok := height.(uint64)
if !ok {
logWithCommand.Fatal("snapshot.blockHeight needs to be a uint")
}
hashStr := viper.GetString("snapshot.blockHash")
hash := common.HexToHash(hashStr)
if err := snapshotService.CreateSnapshot(uHeight, hash); err != nil {
logWithCommand.Fatal(err)
}
logWithCommand.Infof("state snapshot for height %d and hash %s is complete", uHeight, hashStr)
}
func init() {
rootCmd.AddCommand(stateSnapshotCmd)
stateSnapshotCmd.PersistentFlags().String("leveldb-path", "", "path to leveldb")
stateSnapshotCmd.PersistentFlags().String("block-height", "", "blockheight to extract state at")
stateSnapshotCmd.PersistentFlags().String("block-hash", "", "blockhash to extract state at")
viper.BindPFlag("leveldb.path", stateSnapshotCmd.PersistentFlags().Lookup("leveldb-path"))
viper.BindPFlag("snapshot.blockHeight", stateSnapshotCmd.PersistentFlags().Lookup("block-height"))
viper.BindPFlag("snapshot.blockHash", stateSnapshotCmd.PersistentFlags().Lookup("block-hash"))
}

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module github.com/vulcanize/eth-pg-ipfs-state-snapshot
go 1.13
require (
github.com/ethereum/go-ethereum v1.9.11
github.com/multiformats/go-multihash v0.0.13
github.com/sirupsen/logrus v1.6.0
github.com/spf13/cobra v1.0.0
github.com/spf13/viper v1.7.0
github.com/vulcanize/ipfs-blockchain-watcher v0.0.11-alpha
)
replace github.com/ethereum/go-ethereum v1.9.11 => github.com/vulcanize/go-ethereum v1.9.11-statediff-0.0.2

1365
go.sum Normal file
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22
main.go Normal file
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// Copyright © 2020 Vulcanize, Inc
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package main
import "github.com/vulcanize/eth-pg-ipfs-state-snapshot/cmd"
func main() {
cmd.Execute()
}

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pkg/snapshot/config.go Normal file
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// Copyright © 2020 Vulcanize, Inc
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package snapshot
import (
"github.com/spf13/viper"
"github.com/vulcanize/ipfs-blockchain-watcher/pkg/config"
"github.com/vulcanize/ipfs-blockchain-watcher/pkg/core"
)
const (
LVL_DB_PATH = "LVL_DB_PATH"
ETH_NODE_ID = "ETH_NODE_ID"
ETH_CLIENT_NAME = "ETH_CLIENT_NAME"
ETH_GENESIS_BLOCK = "ETH_GENESIS_BLOCK"
ETH_NETWORK_ID = "ETH_NETWORK_ID"
)
type Config struct {
LevelDBPath string
Node core.Node
DBConfig config.Database
}
func (c *Config) Init() {
c.DBConfig.Init()
viper.BindEnv("leveldb.path", LVL_DB_PATH)
viper.BindEnv("ethereum.nodeID", ETH_NODE_ID)
viper.BindEnv("ethereum.clientName", ETH_CLIENT_NAME)
viper.BindEnv("ethereum.genesisBlock", ETH_GENESIS_BLOCK)
viper.BindEnv("ethereum.networkID", ETH_NETWORK_ID)
c.Node = core.Node{
ID: viper.GetString("ethereum.nodeID"),
ClientName: viper.GetString("ethereum.clientName"),
GenesisBlock: viper.GetString("ethereum.genesisBlock"),
NetworkID: viper.GetString("ethereum.networkID"),
}
c.LevelDBPath = viper.GetString("leveldb.path")
}

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pkg/snapshot/node_type.go Normal file
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// Copyright © 2020 Vulcanize, Inc
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package snapshot
import (
"fmt"
"github.com/ethereum/go-ethereum/common"
)
// Node for holding trie node information
type Node struct {
NodeType NodeType
Path []byte
Key common.Hash
Value []byte
}
// NodeType for explicitly setting type of node
type NodeType int
const (
Branch NodeType = iota
Extension
Leaf
Removed
Unknown
)
// CheckKeyType checks what type of key we have
func CheckKeyType(elements []interface{}) (NodeType, error) {
if len(elements) > 2 {
return Branch, nil
}
if len(elements) < 2 {
return Unknown, fmt.Errorf("node cannot be less than two elements in length")
}
switch elements[0].([]byte)[0] / 16 {
case '\x00':
return Extension, nil
case '\x01':
return Extension, nil
case '\x02':
return Leaf, nil
case '\x03':
return Leaf, nil
default:
return Unknown, fmt.Errorf("unknown hex prefix")
}
}

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// Copyright © 2020 Vulcanize, Inc
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package snapshot
import (
"bytes"
"github.com/ethereum/go-ethereum/core/types"
"github.com/multiformats/go-multihash"
"github.com/vulcanize/ipfs-blockchain-watcher/pkg/ipfs/ipld"
"github.com/vulcanize/ipfs-blockchain-watcher/pkg/postgres"
"github.com/vulcanize/ipfs-blockchain-watcher/pkg/shared"
)
type Publisher struct {
db *postgres.DB
}
func NewPublisher(db *postgres.DB) *Publisher {
return &Publisher{
db: db,
}
}
func (p *Publisher) PublishHeader(header *types.Header) (int64, error) {
headerNode, err := ipld.NewEthHeader(header)
if err != nil {
return 0, err
}
tx, err := p.db.Beginx()
if err != nil {
return 0, err
}
defer func() {
if p := recover(); p != nil {
shared.Rollback(tx)
panic(p)
} else if err != nil {
shared.Rollback(tx)
} else {
err = tx.Commit()
}
}()
if err := shared.PublishIPLD(tx, headerNode); err != nil {
return 0, err
}
var headerID int64
err = tx.QueryRowx(`INSERT INTO eth.header_cids (block_number, block_hash, parent_hash, cid, td, node_id, reward, state_root, tx_root, receipt_root, uncle_root, bloom, timestamp, times_validated)
VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14)
ON CONFLICT (block_number, block_hash) DO UPDATE SET block_number = header_cids.block_number
RETURNING id`,
header.Number.Uint64(), header.Hash().Hex(), header.ParentHash.Hex(), headerNode.Cid(), "0", p.db.NodeID, "0", header.Root.Hex(), header.TxHash.Hex(),
header.ReceiptHash.Hex(), header.UncleHash.Hex(), header.Bloom.Bytes(), header.Time, 0).Scan(&headerID)
return headerID, err
}
func (p *Publisher) PublishStateNode(node Node, headerID int64) (int64, error) {
var stateID int64
var stateKey string
if !bytes.Equal(node.Key.Bytes(), nullHash.Bytes()) {
stateKey = node.Key.Hex()
}
tx, err := p.db.Beginx()
if err != nil {
return 0, err
}
defer func() {
if p := recover(); p != nil {
shared.Rollback(tx)
panic(p)
} else if err != nil {
shared.Rollback(tx)
} else {
err = tx.Commit()
}
}()
stateCIDStr, err := shared.PublishRaw(tx, ipld.MEthStateTrie, multihash.KECCAK_256, node.Value)
if err != nil {
return 0, err
}
err = tx.QueryRowx(`INSERT INTO eth.state_cids (header_id, state_leaf_key, cid, state_path, node_type, diff) VALUES ($1, $2, $3, $4, $5, $6)
ON CONFLICT (header_id, state_path, diff) DO UPDATE SET (state_leaf_key, cid, node_type) = ($2, $3, $5, $6)
RETURNING id`,
headerID, stateKey, stateCIDStr, node.Path, node.NodeType, false).Scan(&stateID)
return stateID, err
}
func (p *Publisher) PublishStorageNode(node Node, stateID int64) error {
var storageKey string
if !bytes.Equal(node.Key.Bytes(), nullHash.Bytes()) {
storageKey = node.Key.Hex()
}
tx, err := p.db.Beginx()
if err != nil {
return err
}
defer func() {
if p := recover(); p != nil {
shared.Rollback(tx)
panic(p)
} else if err != nil {
shared.Rollback(tx)
} else {
err = tx.Commit()
}
}()
storageCIDStr, err := shared.PublishRaw(tx, ipld.MEthStorageTrie, multihash.KECCAK_256, node.Value)
if err != nil {
return err
}
_, err = tx.Exec(`INSERT INTO eth.storage_cids (state_id, storage_leaf_key, cid, storage_path, node_type, diff) VALUES ($1, $2, $3, $4, $5, $6)
ON CONFLICT (state_id, storage_path) DO UPDATE SET (storage_leaf_key, cid, node_type, diff) = ($2, $3, $5, $6)`,
stateID, storageKey, storageCIDStr, node.Path, node.NodeType, false)
return err
}

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// Copyright © 2020 Vulcanize, Inc
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package snapshot
import (
"bytes"
"errors"
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
"github.com/vulcanize/ipfs-blockchain-watcher/pkg/postgres"
)
var (
nullHash = common.HexToHash("0x0000000000000000000000000000000000000000000000000000000000000000")
emptyNode, _ = rlp.EncodeToBytes([]byte{})
emptyContractRoot = crypto.Keccak256Hash(emptyNode)
)
type Service struct {
ethDB ethdb.Database
stateDB state.Database
ipfsPublisher *Publisher
}
func NewSnapshotService(con Config) (*Service, error) {
pgdb, err := postgres.NewDB(con.DBConfig, con.Node)
if err != nil {
return nil, err
}
edb, err := rawdb.NewLevelDBDatabase(con.LevelDBPath, 256, 0, "")
if err != nil {
return nil, err
}
return &Service{
ethDB: edb,
stateDB: state.NewDatabase(edb),
ipfsPublisher: NewPublisher(pgdb),
}, nil
}
func (s *Service) CreateSnapshot(height uint64, hash common.Hash) error {
// extract header from lvldb and publish to PG-IPFS
// hold onto the headerID so that we can link the state nodes to this header
header := rawdb.ReadHeader(s.ethDB, hash, height)
headerID, err := s.ipfsPublisher.PublishHeader(header)
if err != nil {
return err
}
t, err := s.stateDB.OpenTrie(header.Root)
if err != nil {
return err
}
trieDB := s.stateDB.TrieDB()
return s.createSnapshot(t.NodeIterator([]byte{}), trieDB, headerID)
}
func (s *Service) createSnapshot(it trie.NodeIterator, trieDB *trie.Database, headerID int64) error {
for it.Next(true) {
if it.Leaf() { // "leaf" nodes are actually "value" nodes, whose parents are the actual leaves
continue
}
if bytes.Equal(nullHash.Bytes(), it.Hash().Bytes()) {
continue
}
nodePath := make([]byte, len(it.Path()))
copy(nodePath, it.Path())
node, err := trieDB.Node(it.Hash())
if err != nil {
return err
}
var nodeElements []interface{}
if err := rlp.DecodeBytes(node, &nodeElements); err != nil {
return err
}
ty, err := CheckKeyType(nodeElements)
if err != nil {
return err
}
stateNode := Node{
NodeType: ty,
Path: nodePath,
Value: node,
}
switch ty {
case Leaf:
var account state.Account
if err := rlp.DecodeBytes(nodeElements[1].([]byte), &account); err != nil {
return fmt.Errorf("error decoding account for leaf node at path %x nerror: %v", nodePath, err)
}
partialPath := trie.CompactToHex(nodeElements[0].([]byte))
valueNodePath := append(nodePath, partialPath...)
encodedPath := trie.HexToCompact(valueNodePath)
leafKey := encodedPath[1:]
stateNode.Key = common.BytesToHash(leafKey)
stateID, err := s.ipfsPublisher.PublishStateNode(stateNode, headerID)
if err != nil {
return err
}
if err := s.storageSnapshot(account.Root, stateID); err != nil {
return fmt.Errorf("failed building eventual storage diffs for account %+v\r\nerror: %v", account, err)
}
case Extension, Branch:
stateNode.Key = common.BytesToHash([]byte{})
if _, err := s.ipfsPublisher.PublishStateNode(stateNode, headerID); err != nil {
return err
}
default:
return errors.New("unexpected node type")
}
}
return nil
}
// buildStorageNodesEventual builds the storage diff node objects for a created account
// i.e. it returns all the storage nodes at this state, since there is no previous state
func (s *Service) storageSnapshot(sr common.Hash, stateID int64) error {
if bytes.Equal(sr.Bytes(), emptyContractRoot.Bytes()) {
return nil
}
log.Debug("Storage Root For Eventual Diff", "root", sr.Hex())
sTrie, err := s.stateDB.OpenTrie(sr)
if err != nil {
log.Info("error in build storage diff eventual", "error", err)
return err
}
it := sTrie.NodeIterator(make([]byte, 0))
for it.Next(true) {
// skip value nodes
if it.Leaf() {
continue
}
if bytes.Equal(nullHash.Bytes(), it.Hash().Bytes()) {
continue
}
nodePath := make([]byte, len(it.Path()))
copy(nodePath, it.Path())
node, err := s.stateDB.TrieDB().Node(it.Hash())
if err != nil {
return err
}
var nodeElements []interface{}
if err := rlp.DecodeBytes(node, &nodeElements); err != nil {
return err
}
ty, err := CheckKeyType(nodeElements)
if err != nil {
return err
}
storageNode := Node{
NodeType: ty,
Path: nodePath,
Value: node,
}
switch ty {
case Leaf:
partialPath := trie.CompactToHex(nodeElements[0].([]byte))
valueNodePath := append(nodePath, partialPath...)
encodedPath := trie.HexToCompact(valueNodePath)
leafKey := encodedPath[1:]
storageNode.Key = common.BytesToHash(leafKey)
case Extension, Branch:
storageNode.Key = common.BytesToHash([]byte{})
default:
return errors.New("unexpected node type")
}
if err := s.ipfsPublisher.PublishStorageNode(storageNode, stateID); err != nil {
return err
}
}
return nil
}