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- // 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/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/core/types"
- "github.com/ethereum/go-ethereum/ethdb"
- "github.com/ethereum/go-ethereum/log"
- "github.com/ethereum/go-ethereum/params"
- "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())
- }
- }
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