215 lines
8.3 KiB
Go
215 lines
8.3 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 contains a collection of low level database accessors.
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package rawdb
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import (
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"bytes"
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"encoding/binary"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/metrics"
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)
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// The fields below define the low level database schema prefixing.
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var (
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// databaseVerisionKey tracks the current database version.
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databaseVerisionKey = []byte("DatabaseVersion")
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// headHeaderKey tracks the latest known header's hash.
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headHeaderKey = []byte("LastHeader")
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// headBlockKey tracks the latest known full block's hash.
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headBlockKey = []byte("LastBlock")
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// headFastBlockKey tracks the latest known incomplete block's hash during fast sync.
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headFastBlockKey = []byte("LastFast")
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// lastPivotKey tracks the last pivot block used by fast sync (to reenable on sethead).
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lastPivotKey = []byte("LastPivot")
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// fastTrieProgressKey tracks the number of trie entries imported during fast sync.
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fastTrieProgressKey = []byte("TrieSync")
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// snapshotRootKey tracks the hash of the last snapshot.
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snapshotRootKey = []byte("SnapshotRoot")
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// snapshotJournalKey tracks the in-memory diff layers across restarts.
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snapshotJournalKey = []byte("SnapshotJournal")
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// txIndexTailKey tracks the oldest block whose transactions have been indexed.
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txIndexTailKey = []byte("TransactionIndexTail")
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// fastTxLookupLimitKey tracks the transaction lookup limit during fast sync.
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fastTxLookupLimitKey = []byte("FastTransactionLookupLimit")
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// Data item prefixes (use single byte to avoid mixing data types, avoid `i`, used for indexes).
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headerPrefix = []byte("h") // headerPrefix + num (uint64 big endian) + hash -> header
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headerTDSuffix = []byte("t") // headerPrefix + num (uint64 big endian) + hash + headerTDSuffix -> td
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headerHashSuffix = []byte("n") // headerPrefix + num (uint64 big endian) + headerHashSuffix -> hash
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headerNumberPrefix = []byte("H") // headerNumberPrefix + hash -> num (uint64 big endian)
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blockBodyPrefix = []byte("b") // blockBodyPrefix + num (uint64 big endian) + hash -> block body
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blockReceiptsPrefix = []byte("r") // blockReceiptsPrefix + num (uint64 big endian) + hash -> block receipts
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txLookupPrefix = []byte("l") // txLookupPrefix + hash -> transaction/receipt lookup metadata
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bloomBitsPrefix = []byte("B") // bloomBitsPrefix + bit (uint16 big endian) + section (uint64 big endian) + hash -> bloom bits
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SnapshotAccountPrefix = []byte("a") // SnapshotAccountPrefix + account hash -> account trie value
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SnapshotStoragePrefix = []byte("o") // SnapshotStoragePrefix + account hash + storage hash -> storage trie value
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codePrefix = []byte("c") // codePrefix + code hash -> account code
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preimagePrefix = []byte("secure-key-") // preimagePrefix + hash -> preimage
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configPrefix = []byte("ethereum-config-") // config prefix for the db
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// Chain index prefixes (use `i` + single byte to avoid mixing data types).
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BloomBitsIndexPrefix = []byte("iB") // BloomBitsIndexPrefix is the data table of a chain indexer to track its progress
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preimageCounter = metrics.NewRegisteredCounter("db/preimage/total", nil)
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preimageHitCounter = metrics.NewRegisteredCounter("db/preimage/hits", nil)
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)
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const (
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// freezerHeaderTable indicates the name of the freezer header table.
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freezerHeaderTable = "headers"
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// freezerHashTable indicates the name of the freezer canonical hash table.
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freezerHashTable = "hashes"
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// freezerBodiesTable indicates the name of the freezer block body table.
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freezerBodiesTable = "bodies"
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// freezerReceiptTable indicates the name of the freezer receipts table.
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freezerReceiptTable = "receipts"
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// freezerDifficultyTable indicates the name of the freezer total difficulty table.
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freezerDifficultyTable = "diffs"
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)
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// freezerNoSnappy configures whether compression is disabled for the ancient-tables.
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// Hashes and difficulties don't compress well.
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var freezerNoSnappy = map[string]bool{
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freezerHeaderTable: false,
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freezerHashTable: true,
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freezerBodiesTable: false,
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freezerReceiptTable: false,
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freezerDifficultyTable: true,
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}
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// LegacyTxLookupEntry is the legacy TxLookupEntry definition with some unnecessary
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// fields.
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type LegacyTxLookupEntry struct {
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BlockHash common.Hash
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BlockIndex uint64
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Index uint64
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}
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// encodeBlockNumber encodes a block number as big endian uint64
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func encodeBlockNumber(number uint64) []byte {
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enc := make([]byte, 8)
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binary.BigEndian.PutUint64(enc, number)
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return enc
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}
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// headerKeyPrefix = headerPrefix + num (uint64 big endian)
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func headerKeyPrefix(number uint64) []byte {
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return append(headerPrefix, encodeBlockNumber(number)...)
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}
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// headerKey = headerPrefix + num (uint64 big endian) + hash
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func headerKey(number uint64, hash common.Hash) []byte {
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return append(append(headerPrefix, encodeBlockNumber(number)...), hash.Bytes()...)
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}
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// headerTDKey = headerPrefix + num (uint64 big endian) + hash + headerTDSuffix
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func headerTDKey(number uint64, hash common.Hash) []byte {
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return append(headerKey(number, hash), headerTDSuffix...)
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}
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// headerHashKey = headerPrefix + num (uint64 big endian) + headerHashSuffix
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func headerHashKey(number uint64) []byte {
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return append(append(headerPrefix, encodeBlockNumber(number)...), headerHashSuffix...)
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}
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// headerNumberKey = headerNumberPrefix + hash
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func headerNumberKey(hash common.Hash) []byte {
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return append(headerNumberPrefix, hash.Bytes()...)
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}
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// blockBodyKey = blockBodyPrefix + num (uint64 big endian) + hash
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func blockBodyKey(number uint64, hash common.Hash) []byte {
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return append(append(blockBodyPrefix, encodeBlockNumber(number)...), hash.Bytes()...)
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}
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// blockReceiptsKey = blockReceiptsPrefix + num (uint64 big endian) + hash
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func blockReceiptsKey(number uint64, hash common.Hash) []byte {
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return append(append(blockReceiptsPrefix, encodeBlockNumber(number)...), hash.Bytes()...)
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}
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// txLookupKey = txLookupPrefix + hash
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func txLookupKey(hash common.Hash) []byte {
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return append(txLookupPrefix, hash.Bytes()...)
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}
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// accountSnapshotKey = SnapshotAccountPrefix + hash
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func accountSnapshotKey(hash common.Hash) []byte {
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return append(SnapshotAccountPrefix, hash.Bytes()...)
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}
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// storageSnapshotKey = SnapshotStoragePrefix + account hash + storage hash
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func storageSnapshotKey(accountHash, storageHash common.Hash) []byte {
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return append(append(SnapshotStoragePrefix, accountHash.Bytes()...), storageHash.Bytes()...)
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}
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// storageSnapshotsKey = SnapshotStoragePrefix + account hash + storage hash
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func storageSnapshotsKey(accountHash common.Hash) []byte {
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return append(SnapshotStoragePrefix, accountHash.Bytes()...)
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}
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// bloomBitsKey = bloomBitsPrefix + bit (uint16 big endian) + section (uint64 big endian) + hash
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func bloomBitsKey(bit uint, section uint64, hash common.Hash) []byte {
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key := append(append(bloomBitsPrefix, make([]byte, 10)...), hash.Bytes()...)
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binary.BigEndian.PutUint16(key[1:], uint16(bit))
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binary.BigEndian.PutUint64(key[3:], section)
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return key
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}
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// preimageKey = preimagePrefix + hash
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func preimageKey(hash common.Hash) []byte {
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return append(preimagePrefix, hash.Bytes()...)
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}
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// codeKey = codePrefix + hash
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func codeKey(hash common.Hash) []byte {
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return append(codePrefix, hash.Bytes()...)
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}
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// IsCodeKey reports whether the given byte slice is the key of contract code,
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// if so return the raw code hash as well.
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func IsCodeKey(key []byte) (bool, []byte) {
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if bytes.HasPrefix(key, codePrefix) && len(key) == common.HashLength+len(codePrefix) {
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return true, key[len(codePrefix):]
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}
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return false, nil
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}
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// configKey = configPrefix + hash
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func configKey(hash common.Hash) []byte {
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return append(configPrefix, hash.Bytes()...)
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}
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