eth-statediff-service/pkg/reader.go
nikugogoi 5f6aec35b2
Support remote RPC client to access LevelDB (#83)
* Implement use of custom chain config to test locally

* Use leveldb-ethdb-rpc instead of leveldb path

* Implement flag for leveldb access mode

* Remove custom chain config json

* Move database client to leveldb-ethdb-rpc

* Update leveldb-ethdb-rpc version
2022-05-17 14:35:11 +05:30

132 lines
4.3 KiB
Go

// 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 statediff
import (
"fmt"
"math/big"
"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/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/trie"
"github.com/vulcanize/leveldb-ethdb-rpc/pkg/client"
)
// Reader interface required by the statediffing service
type Reader interface {
GetBlockByHash(hash common.Hash) (*types.Block, error)
GetBlockByNumber(number uint64) (*types.Block, error)
GetReceiptsByHash(hash common.Hash) (types.Receipts, error)
GetTdByHash(hash common.Hash) (*big.Int, error)
StateDB() state.Database
}
// LvlDBReader exposes the necessary Reader methods on lvldb
type LvlDBReader struct {
ethDB ethdb.Database
stateDB state.Database
chainConfig *params.ChainConfig
}
// LvLDBReaderConfig struct for initializing a LvlDBReader
type LvLDBReaderConfig struct {
TrieConfig *trie.Config
ChainConfig *params.ChainConfig
Mode string
Path, AncientPath, Url string
DBCacheSize int
}
// NewLvlDBReader creates a new Read using LevelDB
func NewLvlDBReader(conf LvLDBReaderConfig) (*LvlDBReader, error) {
var edb ethdb.Database
var err error
if conf.Mode == "local" {
edb, err = rawdb.NewLevelDBDatabaseWithFreezer(conf.Path, conf.DBCacheSize, 256, conf.AncientPath, "eth-statediff-service", true)
}
if conf.Mode == "remote" {
edb, err = client.NewDatabaseClient(conf.Url)
}
if err != nil {
return nil, err
}
return &LvlDBReader{
ethDB: edb,
stateDB: state.NewDatabaseWithConfig(edb, conf.TrieConfig),
chainConfig: conf.ChainConfig,
}, nil
}
// GetBlockByHash gets block by hash
func (ldr *LvlDBReader) GetBlockByHash(hash common.Hash) (*types.Block, error) {
height := rawdb.ReadHeaderNumber(ldr.ethDB, hash)
if height == nil {
return nil, fmt.Errorf("unable to read header height for header hash %s", hash.String())
}
block := rawdb.ReadBlock(ldr.ethDB, hash, *height)
if block == nil {
return nil, fmt.Errorf("unable to read block at height %d hash %s", *height, hash.String())
}
return block, nil
}
func (ldr *LvlDBReader) GetBlockByNumber(number uint64) (*types.Block, error) {
hash := rawdb.ReadCanonicalHash(ldr.ethDB, number)
block := rawdb.ReadBlock(ldr.ethDB, hash, number)
if block == nil {
return nil, fmt.Errorf("unable to read block at height %d hash %s", number, hash.String())
}
return block, nil
}
// GetReceiptsByHash gets receipt by hash
func (ldr *LvlDBReader) GetReceiptsByHash(hash common.Hash) (types.Receipts, error) {
number := rawdb.ReadHeaderNumber(ldr.ethDB, hash)
if number == nil {
return nil, fmt.Errorf("unable to read header height for header hash %s", hash.String())
}
receipts := rawdb.ReadReceipts(ldr.ethDB, hash, *number, ldr.chainConfig)
if receipts == nil {
return nil, fmt.Errorf("unable to read receipts at height %d hash %s", number, hash.String())
}
return receipts, nil
}
// GetTdByHash gets td by hash
func (ldr *LvlDBReader) GetTdByHash(hash common.Hash) (*big.Int, error) {
number := rawdb.ReadHeaderNumber(ldr.ethDB, hash)
if number == nil {
return nil, fmt.Errorf("unable to read header height for header hash %s", hash.String())
}
td := rawdb.ReadTd(ldr.ethDB, hash, *number)
if td == nil {
return nil, fmt.Errorf("unable to read total difficulty at height %d hash %s", number, hash.String())
}
return td, nil
}
// StateDB returns the underlying statedb
func (ldr *LvlDBReader) StateDB() state.Database {
return ldr.stateDB
}