From d235e2c6a5788ec4a6cff15a16f56b38a3876a0d Mon Sep 17 00:00:00 2001 From: Determinant Date: Sun, 28 Jun 2020 14:47:41 -0400 Subject: ... --- core/rawdb/accessors_indexes.go | 131 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 131 insertions(+) create mode 100644 core/rawdb/accessors_indexes.go (limited to 'core/rawdb/accessors_indexes.go') diff --git a/core/rawdb/accessors_indexes.go b/core/rawdb/accessors_indexes.go new file mode 100644 index 0000000..1dd478a --- /dev/null +++ b/core/rawdb/accessors_indexes.go @@ -0,0 +1,131 @@ +// 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 . + +package rawdb + +import ( + "math/big" + + "github.com/ava-labs/coreth/core/types" + "github.com/ava-labs/coreth/params" + "github.com/ava-labs/go-ethereum/common" + "github.com/ava-labs/go-ethereum/ethdb" + "github.com/ava-labs/go-ethereum/log" + "github.com/ava-labs/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 +} + +// WriteTxLookupEntries stores a positional metadata for every transaction from +// a block, enabling hash based transaction and receipt lookups. +func WriteTxLookupEntries(db ethdb.KeyValueWriter, block *types.Block) { + number := block.Number().Bytes() + for _, tx := range block.Transactions() { + if err := db.Put(txLookupKey(tx.Hash()), number); err != nil { + log.Crit("Failed to store transaction lookup entry", "err", err) + } + } +} + +// DeleteTxLookupEntry removes all transaction data associated with a hash. +func DeleteTxLookupEntry(db ethdb.KeyValueWriter, hash common.Hash) { + db.Delete(txLookupKey(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) + } +} -- cgit v1.2.3-70-g09d2