123 lines
4.7 KiB
Go
123 lines
4.7 KiB
Go
// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rawdb
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rlp"
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)
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// ReadTxLookupEntry retrieves the positional metadata associated with a transaction
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// hash to allow retrieving the transaction or receipt by hash.
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func ReadTxLookupEntry(db ethdb.Reader, hash common.Hash) common.Hash {
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data, _ := db.Get(txLookupKey(hash))
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if len(data) == 0 {
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return common.Hash{}
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}
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if len(data) == common.HashLength {
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return common.BytesToHash(data)
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}
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// Probably it's legacy txlookup entry data, try to decode it.
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var entry LegacyTxLookupEntry
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if err := rlp.DecodeBytes(data, &entry); err != nil {
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log.Error("Invalid transaction lookup entry RLP", "hash", hash, "blob", data, "err", err)
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return common.Hash{}
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}
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return entry.BlockHash
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}
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// WriteTxLookupEntries stores a positional metadata for every transaction from
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// a block, enabling hash based transaction and receipt lookups.
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func WriteTxLookupEntries(db ethdb.Writer, block *types.Block) {
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for _, tx := range block.Transactions() {
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if err := db.Put(txLookupKey(tx.Hash()), block.Hash().Bytes()); err != nil {
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log.Crit("Failed to store transaction lookup entry", "err", err)
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}
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}
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}
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// DeleteTxLookupEntry removes all transaction data associated with a hash.
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func DeleteTxLookupEntry(db ethdb.Writer, hash common.Hash) {
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db.Delete(txLookupKey(hash))
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}
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// ReadTransaction retrieves a specific transaction from the database, along with
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// its added positional metadata.
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func ReadTransaction(db ethdb.Reader, hash common.Hash) (*types.Transaction, common.Hash, uint64, uint64) {
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blockHash := ReadTxLookupEntry(db, hash)
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if blockHash == (common.Hash{}) {
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return nil, common.Hash{}, 0, 0
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}
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blockNumber := ReadHeaderNumber(db, blockHash)
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if blockNumber == nil {
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return nil, common.Hash{}, 0, 0
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}
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body := ReadBody(db, blockHash, *blockNumber)
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if body == nil {
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log.Error("Transaction referenced missing", "number", blockNumber, "hash", blockHash)
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return nil, common.Hash{}, 0, 0
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}
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for txIndex, tx := range body.Transactions {
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if tx.Hash() == hash {
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return tx, blockHash, *blockNumber, uint64(txIndex)
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}
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}
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log.Error("Transaction not found", "number", blockNumber, "hash", blockHash, "txhash", hash)
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return nil, common.Hash{}, 0, 0
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}
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// ReadReceipt retrieves a specific transaction receipt from the database, along with
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// its added positional metadata.
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func ReadReceipt(db ethdb.Reader, hash common.Hash, config *params.ChainConfig) (*types.Receipt, common.Hash, uint64, uint64) {
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// Retrieve the context of the receipt based on the transaction hash
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blockHash := ReadTxLookupEntry(db, hash)
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if blockHash == (common.Hash{}) {
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return nil, common.Hash{}, 0, 0
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}
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blockNumber := ReadHeaderNumber(db, blockHash)
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if blockNumber == nil {
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return nil, common.Hash{}, 0, 0
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}
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// Read all the receipts from the block and return the one with the matching hash
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receipts := ReadReceipts(db, blockHash, *blockNumber, config)
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for receiptIndex, receipt := range receipts {
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if receipt.TxHash == hash {
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return receipt, blockHash, *blockNumber, uint64(receiptIndex)
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}
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}
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log.Error("Receipt not found", "number", blockNumber, "hash", blockHash, "txhash", hash)
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return nil, common.Hash{}, 0, 0
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}
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// ReadBloomBits retrieves the compressed bloom bit vector belonging to the given
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// section and bit index from the.
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func ReadBloomBits(db ethdb.Reader, bit uint, section uint64, head common.Hash) ([]byte, error) {
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return db.Get(bloomBitsKey(bit, section, head))
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}
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// WriteBloomBits stores the compressed bloom bits vector belonging to the given
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// section and bit index.
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func WriteBloomBits(db ethdb.Writer, bit uint, section uint64, head common.Hash, bits []byte) {
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if err := db.Put(bloomBitsKey(bit, section, head), bits); err != nil {
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log.Crit("Failed to store bloom bits", "err", err)
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}
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}
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