80 lines
3.4 KiB
Go
80 lines
3.4 KiB
Go
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// 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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"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 know header's hash.
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headHeaderKey = []byte("LastHeader")
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// headBlockKey tracks the latest know full block's hash.
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headBlockKey = []byte("LastBlock")
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// headFastBlockKey tracks the latest known incomplete block's hash duirng fast sync.
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headFastBlockKey = []byte("LastFast")
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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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// 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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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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// TxLookupEntry is a positional metadata to help looking up the data content of
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// a transaction or receipt given only its hash.
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type TxLookupEntry 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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