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// Copyright 2014 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 state
import (
"encoding/json"
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/trie"
)
// DumpCollector interface which the state trie calls during iteration
type DumpCollector interface {
// OnRoot is called with the state root
OnRoot(common.Hash)
// OnAccount is called once for each account in the trie
OnAccount(common.Address, DumpAccount)
}
// DumpAccount represents an account in the state.
type DumpAccount struct {
Balance string `json:"balance"`
Nonce uint64 `json:"nonce"`
Root string `json:"root"`
CodeHash string `json:"codeHash"`
Code string `json:"code,omitempty"`
Storage map[common.Hash]string `json:"storage,omitempty"`
Address *common.Address `json:"address,omitempty"` // Address only present in iterative (line-by-line) mode
SecureKey hexutil.Bytes `json:"key,omitempty"` // If we don't have address, we can output the key
}
// Dump represents the full dump in a collected format, as one large map.
type Dump struct {
Root string `json:"root"`
Accounts map[common.Address]DumpAccount `json:"accounts"`
}
// OnRoot implements DumpCollector interface
func (d *Dump) OnRoot(root common.Hash) {
d.Root = fmt.Sprintf("%x", root)
}
// OnAccount implements DumpCollector interface
func (d *Dump) OnAccount(addr common.Address, account DumpAccount) {
d.Accounts[addr] = account
}
// IteratorDump is an implementation for iterating over data.
type IteratorDump struct {
Root string `json:"root"`
Accounts map[common.Address]DumpAccount `json:"accounts"`
Next []byte `json:"next,omitempty"` // nil if no more accounts
}
// OnRoot implements DumpCollector interface
func (d *IteratorDump) OnRoot(root common.Hash) {
d.Root = fmt.Sprintf("%x", root)
}
// OnAccount implements DumpCollector interface
func (d *IteratorDump) OnAccount(addr common.Address, account DumpAccount) {
d.Accounts[addr] = account
}
// iterativeDump is a DumpCollector-implementation which dumps output line-by-line iteratively.
type iterativeDump struct {
*json.Encoder
}
// OnAccount implements DumpCollector interface
func (d iterativeDump) OnAccount(addr common.Address, account DumpAccount) {
dumpAccount := &DumpAccount{
Balance: account.Balance,
Nonce: account.Nonce,
Root: account.Root,
CodeHash: account.CodeHash,
Code: account.Code,
Storage: account.Storage,
SecureKey: account.SecureKey,
Address: nil,
}
if addr != (common.Address{}) {
dumpAccount.Address = &addr
}
d.Encode(dumpAccount)
}
// OnRoot implements DumpCollector interface
func (d iterativeDump) OnRoot(root common.Hash) {
d.Encode(struct {
Root common.Hash `json:"root"`
}{root})
}
func (s *StateDB) DumpToCollector(c DumpCollector, excludeCode, excludeStorage, excludeMissingPreimages bool, start []byte, maxResults int) (nextKey []byte) {
missingPreimages := 0
c.OnRoot(s.trie.Hash())
var count int
it := trie.NewIterator(s.trie.NodeIterator(start))
for it.Next() {
var data Account
if err := rlp.DecodeBytes(it.Value, &data); err != nil {
panic(err)
}
account := DumpAccount{
Balance: data.Balance.String(),
Nonce: data.Nonce,
Root: common.Bytes2Hex(data.Root[:]),
CodeHash: common.Bytes2Hex(data.CodeHash),
}
addrBytes := s.trie.GetKey(it.Key)
if addrBytes == nil {
// Preimage missing
missingPreimages++
if excludeMissingPreimages {
continue
}
account.SecureKey = it.Key
}
addr := common.BytesToAddress(addrBytes)
obj := newObject(nil, addr, data)
if !excludeCode {
account.Code = common.Bytes2Hex(obj.Code(s.db))
}
if !excludeStorage {
account.Storage = make(map[common.Hash]string)
storageIt := trie.NewIterator(obj.getTrie(s.db).NodeIterator(nil))
for storageIt.Next() {
_, content, _, err := rlp.Split(storageIt.Value)
if err != nil {
log.Error("Failed to decode the value returned by iterator", "error", err)
continue
}
account.Storage[common.BytesToHash(s.trie.GetKey(storageIt.Key))] = common.Bytes2Hex(content)
}
}
c.OnAccount(addr, account)
count++
if maxResults > 0 && count >= maxResults {
if it.Next() {
nextKey = it.Key
}
break
}
}
if missingPreimages > 0 {
log.Warn("Dump incomplete due to missing preimages", "missing", missingPreimages)
}
return nextKey
}
// RawDump returns the entire state an a single large object
func (s *StateDB) RawDump(excludeCode, excludeStorage, excludeMissingPreimages bool) Dump {
dump := &Dump{
Accounts: make(map[common.Address]DumpAccount),
}
s.DumpToCollector(dump, excludeCode, excludeStorage, excludeMissingPreimages, nil, 0)
return *dump
}
// Dump returns a JSON string representing the entire state as a single json-object
func (s *StateDB) Dump(excludeCode, excludeStorage, excludeMissingPreimages bool) []byte {
dump := s.RawDump(excludeCode, excludeStorage, excludeMissingPreimages)
json, err := json.MarshalIndent(dump, "", " ")
if err != nil {
fmt.Println("Dump err", err)
}
return json
}
// IterativeDump dumps out accounts as json-objects, delimited by linebreaks on stdout
func (s *StateDB) IterativeDump(excludeCode, excludeStorage, excludeMissingPreimages bool, output *json.Encoder) {
s.DumpToCollector(iterativeDump{output}, excludeCode, excludeStorage, excludeMissingPreimages, nil, 0)
}
// IteratorDump dumps out a batch of accounts starts with the given start key
func (s *StateDB) IteratorDump(excludeCode, excludeStorage, excludeMissingPreimages bool, start []byte, maxResults int) IteratorDump {
iterator := &IteratorDump{
Accounts: make(map[common.Address]DumpAccount),
}
iterator.Next = s.DumpToCollector(iterator, excludeCode, excludeStorage, excludeMissingPreimages, start, maxResults)
return *iterator
}
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