// 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"
"math/big"
"github.com/ava-labs/coreth/core/types"
"github.com/ava-labs/coreth/params"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/rlp"
)
// ReadTxLookupEntry retrieves the positional metadata associated with a transaction
// hash to allow retrieving the transaction or receipt by hash.
func ReadTxLookupEntry(db ethdb.Reader, hash common.Hash) *uint64 {
data, _ := db.Get(txLookupKey(hash))
if len(data) == 0 {
return nil
}
// Database v6 tx lookup just stores the block number
if len(data) < common.HashLength {
number := new(big.Int).SetBytes(data).Uint64()
return &number
}
// Database v4-v5 tx lookup format just stores the hash
if len(data) == common.HashLength {
return ReadHeaderNumber(db, common.BytesToHash(data))
}
// Finally try database v3 tx lookup format
var entry LegacyTxLookupEntry
if err := rlp.DecodeBytes(data, &entry); err != nil {
log.Error("Invalid transaction lookup entry RLP", "hash", hash, "blob", data, "err", err)
return nil
}
return &entry.BlockIndex
}
// writeTxLookupEntry stores a positional metadata for a transaction,
// enabling hash based transaction and receipt lookups.
func writeTxLookupEntry(db ethdb.KeyValueWriter, hash common.Hash, numberBytes []byte) {
if err := db.Put(txLookupKey(hash), numberBytes); err != nil {
log.Crit("Failed to store transaction lookup entry", "err", err)
}
}
// WriteTxLookupEntries is identical to WriteTxLookupEntry, but it works on
// a list of hashes
func WriteTxLookupEntries(db ethdb.KeyValueWriter, number uint64, hashes []common.Hash) {
numberBytes := new(big.Int).SetUint64(number).Bytes()
for _, hash := range hashes {
writeTxLookupEntry(db, hash, numberBytes)
}
}
// WriteTxLookupEntriesByBlock stores a positional metadata for every transaction from
// a block, enabling hash based transaction and receipt lookups.
func WriteTxLookupEntriesByBlock(db ethdb.KeyValueWriter, block *types.Block) {
numberBytes := block.Number().Bytes()
for _, tx := range block.Transactions() {
writeTxLookupEntry(db, tx.Hash(), numberBytes)
}
}
// DeleteTxLookupEntry removes all transaction data associated with a hash.
func DeleteTxLookupEntry(db ethdb.KeyValueWriter, hash common.Hash) {
if err := db.Delete(txLookupKey(hash)); err != nil {
log.Crit("Failed to delete transaction lookup entry", "err", err)
}
}
// DeleteTxLookupEntries removes all transaction lookups for a given block.
func DeleteTxLookupEntries(db ethdb.KeyValueWriter, hashes []common.Hash) {
for _, hash := range hashes {
DeleteTxLookupEntry(db, hash)
}
}
// ReadTransaction retrieves a specific transaction from the database, along with
// its added positional metadata.
func ReadTransaction(db ethdb.Reader, hash common.Hash) (*types.Transaction, common.Hash, uint64, uint64) {
blockNumber := ReadTxLookupEntry(db, hash)
if blockNumber == nil {
return nil, common.Hash{}, 0, 0
}
blockHash := ReadCanonicalHash(db, *blockNumber)
if blockHash == (common.Hash{}) {
return nil, common.Hash{}, 0, 0
}
body := ReadBody(db, blockHash, *blockNumber)
if body == nil {
log.Error("Transaction referenced missing", "number", blockNumber, "hash", blockHash)
return nil, common.Hash{}, 0, 0
}
for txIndex, tx := range body.Transactions {
if tx.Hash() == hash {
return tx, blockHash, *blockNumber, uint64(txIndex)
}
}
log.Error("Transaction not found", "number", blockNumber, "hash", blockHash, "txhash", hash)
return nil, common.Hash{}, 0, 0
}
// ReadReceipt retrieves a specific transaction receipt from the database, along with
// its added positional metadata.
func ReadReceipt(db ethdb.Reader, hash common.Hash, config *params.ChainConfig) (*types.Receipt, common.Hash, uint64, uint64) {
// Retrieve the context of the receipt based on the transaction hash
blockNumber := ReadTxLookupEntry(db, hash)
if blockNumber == nil {
return nil, common.Hash{}, 0, 0
}
blockHash := ReadCanonicalHash(db, *blockNumber)
if blockHash == (common.Hash{}) {
return nil, common.Hash{}, 0, 0
}
// Read all the receipts from the block and return the one with the matching hash
receipts := ReadReceipts(db, blockHash, *blockNumber, config)
for receiptIndex, receipt := range receipts {
if receipt.TxHash == hash {
return receipt, blockHash, *blockNumber, uint64(receiptIndex)
}
}
log.Error("Receipt not found", "number", blockNumber, "hash", blockHash, "txhash", hash)
return nil, common.Hash{}, 0, 0
}
// ReadBloomBits retrieves the compressed bloom bit vector belonging to the given
// section and bit index from the.
func ReadBloomBits(db ethdb.KeyValueReader, bit uint, section uint64, head common.Hash) ([]byte, error) {
return db.Get(bloomBitsKey(bit, section, head))
}
// WriteBloomBits stores the compressed bloom bits vector belonging to the given
// section and bit index.
func WriteBloomBits(db ethdb.KeyValueWriter, bit uint, section uint64, head common.Hash, bits []byte) {
if err := db.Put(bloomBitsKey(bit, section, head), bits); err != nil {
log.Crit("Failed to store bloom bits", "err", err)
}
}
// DeleteBloombits removes all compressed bloom bits vector belonging to the
// given section range and bit index.
func DeleteBloombits(db ethdb.Database, bit uint, from uint64, to uint64) {
start, end := bloomBitsKey(bit, from, common.Hash{}), bloomBitsKey(bit, to, common.Hash{})
it := db.NewIterator(nil, start)
defer it.Release()
for it.Next() {
if bytes.Compare(it.Key(), end) >= 0 {
break
}
if len(it.Key()) != len(bloomBitsPrefix)+2+8+32 {
continue
}
db.Delete(it.Key())
}
if it.Error() != nil {
log.Crit("Failed to delete bloom bits", "err", it.Error())
}
}