github.com/neatlab/neatio@v1.7.3-0.20220425043230-d903e92fcc75/chain/core/rawdb/accessors_indexes.go (about)

     1  // Copyright 2018 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package rawdb
    18  
    19  import (
    20  	"github.com/neatlab/neatio/chain/core/types"
    21  	"github.com/neatlab/neatio/chain/log"
    22  	"github.com/neatlab/neatio/neatdb"
    23  	"github.com/neatlab/neatio/utilities/common"
    24  	"github.com/neatlab/neatio/utilities/rlp"
    25  )
    26  
    27  // ReadTxLookupEntry retrieves the positional metadata associated with a transaction
    28  // hash to allow retrieving the transaction or receipt by hash.
    29  func ReadTxLookupEntry(db neatdb.Reader, hash common.Hash) common.Hash {
    30  	data, _ := db.Get(txLookupKey(hash))
    31  	if len(data) == 0 {
    32  		return common.Hash{}
    33  	}
    34  	if len(data) == common.HashLength {
    35  		return common.BytesToHash(data)
    36  	}
    37  	// Probably it's legacy txlookup entry data, try to decode it.
    38  	var entry LegacyTxLookupEntry
    39  	if err := rlp.DecodeBytes(data, &entry); err != nil {
    40  		log.Error("Invalid transaction lookup entry RLP", "hash", hash, "blob", data, "err", err)
    41  		return common.Hash{}
    42  	}
    43  	return entry.BlockHash
    44  }
    45  
    46  // WriteTxLookupEntries stores a positional metadata for every transaction from
    47  // a block, enabling hash based transaction and receipt lookups.
    48  func WriteTxLookupEntries(db neatdb.Writer, block *types.Block) {
    49  	for _, tx := range block.Transactions() {
    50  		if err := db.Put(txLookupKey(tx.Hash()), block.Hash().Bytes()); err != nil {
    51  			log.Crit("Failed to store transaction lookup entry", "err", err)
    52  		}
    53  	}
    54  }
    55  
    56  // DeleteTxLookupEntry removes all transaction data associated with a hash.
    57  func DeleteTxLookupEntry(db neatdb.Writer, hash common.Hash) {
    58  	db.Delete(txLookupKey(hash))
    59  }
    60  
    61  // ReadTransaction retrieves a specific transaction from the database, along with
    62  // its added positional metadata.
    63  func ReadTransaction(db neatdb.Reader, hash common.Hash) (*types.Transaction, common.Hash, uint64, uint64) {
    64  	blockHash := ReadTxLookupEntry(db, hash)
    65  	if blockHash == (common.Hash{}) {
    66  		return nil, common.Hash{}, 0, 0
    67  	}
    68  	blockNumber := ReadHeaderNumber(db, blockHash)
    69  	if blockNumber == nil {
    70  		return nil, common.Hash{}, 0, 0
    71  	}
    72  	body := ReadBody(db, blockHash, *blockNumber)
    73  	if body == nil {
    74  		log.Error("Transaction referenced missing", "number", blockNumber, "hash", blockHash)
    75  		return nil, common.Hash{}, 0, 0
    76  	}
    77  	for txIndex, tx := range body.Transactions {
    78  		if tx.Hash() == hash {
    79  			return tx, blockHash, *blockNumber, uint64(txIndex)
    80  		}
    81  	}
    82  	log.Error("Transaction not found", "number", blockNumber, "hash", blockHash, "txhash", hash)
    83  	return nil, common.Hash{}, 0, 0
    84  }
    85  
    86  // ReadReceipt retrieves a specific transaction receipt from the database, along with
    87  // its added positional metadata.
    88  func ReadReceipt(db neatdb.Reader, hash common.Hash) (*types.Receipt, common.Hash, uint64, uint64) {
    89  	blockHash := ReadTxLookupEntry(db, hash)
    90  	if blockHash == (common.Hash{}) {
    91  		return nil, common.Hash{}, 0, 0
    92  	}
    93  	blockNumber := ReadHeaderNumber(db, blockHash)
    94  	if blockNumber == nil {
    95  		return nil, common.Hash{}, 0, 0
    96  	}
    97  	receipts := ReadReceipts(db, blockHash, *blockNumber)
    98  	for receiptIndex, receipt := range receipts {
    99  		if receipt.TxHash == hash {
   100  			return receipt, blockHash, *blockNumber, uint64(receiptIndex)
   101  		}
   102  	}
   103  	log.Error("Receipt not found", "number", blockNumber, "hash", blockHash, "txhash", hash)
   104  	return nil, common.Hash{}, 0, 0
   105  }
   106  
   107  // ReadBloomBits retrieves the compressed bloom bit vector belonging to the given
   108  // section and bit index from the.
   109  func ReadBloomBits(db neatdb.Reader, bit uint, section uint64, head common.Hash) ([]byte, error) {
   110  	return db.Get(bloomBitsKey(bit, section, head))
   111  }
   112  
   113  // WriteBloomBits stores the compressed bloom bits vector belonging to the given
   114  // section and bit index.
   115  func WriteBloomBits(db neatdb.Writer, bit uint, section uint64, head common.Hash, bits []byte) {
   116  	if err := db.Put(bloomBitsKey(bit, section, head), bits); err != nil {
   117  		log.Crit("Failed to store bloom bits", "err", err)
   118  	}
   119  }