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1 files changed, 166 insertions, 0 deletions

diff --git a/core/rawdb/schema.go b/core/rawdb/schema.go
new file mode 100644
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--- /dev/null
+++ b/core/rawdb/schema.go
@@ -0,0 +1,166 @@
+// 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 <http://www.gnu.org/licenses/>.
+
+// Package rawdb contains a collection of low level database accessors.
+package rawdb
+
+import (
+	"encoding/binary"
+
+	"github.com/ava-labs/go-ethereum/common"
+	"github.com/ava-labs/go-ethereum/metrics"
+)
+
+// The fields below define the low level database schema prefixing.
+var (
+	// databaseVerisionKey tracks the current database version.
+	databaseVerisionKey = []byte("DatabaseVersion")
+
+	// headHeaderKey tracks the latest known header's hash.
+	headHeaderKey = []byte("LastHeader")
+
+	// headBlockKey tracks the latest known full block's hash.
+	headBlockKey = []byte("LastBlock")
+
+	// headFastBlockKey tracks the latest known incomplete block's hash during fast sync.
+	headFastBlockKey = []byte("LastFast")
+
+	// fastTrieProgressKey tracks the number of trie entries imported during fast sync.
+	fastTrieProgressKey = []byte("TrieSync")
+
+	// Data item prefixes (use single byte to avoid mixing data types, avoid `i`, used for indexes).
+	headerPrefix       = []byte("h") // headerPrefix + num (uint64 big endian) + hash -> header
+	headerTDSuffix     = []byte("t") // headerPrefix + num (uint64 big endian) + hash + headerTDSuffix -> td
+	headerHashSuffix   = []byte("n") // headerPrefix + num (uint64 big endian) + headerHashSuffix -> hash
+	headerNumberPrefix = []byte("H") // headerNumberPrefix + hash -> num (uint64 big endian)
+
+	blockBodyPrefix     = []byte("b") // blockBodyPrefix + num (uint64 big endian) + hash -> block body
+	blockReceiptsPrefix = []byte("r") // blockReceiptsPrefix + num (uint64 big endian) + hash -> block receipts
+
+	txLookupPrefix  = []byte("l") // txLookupPrefix + hash -> transaction/receipt lookup metadata
+	bloomBitsPrefix = []byte("B") // bloomBitsPrefix + bit (uint16 big endian) + section (uint64 big endian) + hash -> bloom bits
+
+	preimagePrefix = []byte("secure-key-")      // preimagePrefix + hash -> preimage
+	configPrefix   = []byte("ethereum-config-") // config prefix for the db
+
+	// Chain index prefixes (use `i` + single byte to avoid mixing data types).
+	BloomBitsIndexPrefix = []byte("iB") // BloomBitsIndexPrefix is the data table of a chain indexer to track its progress
+
+	preimageCounter    = metrics.NewRegisteredCounter("db/preimage/total", nil)
+	preimageHitCounter = metrics.NewRegisteredCounter("db/preimage/hits", nil)
+)
+
+const (
+	// freezerHeaderTable indicates the name of the freezer header table.
+	freezerHeaderTable = "headers"
+
+	// freezerHashTable indicates the name of the freezer canonical hash table.
+	freezerHashTable = "hashes"
+
+	// freezerBodiesTable indicates the name of the freezer block body table.
+	freezerBodiesTable = "bodies"
+
+	// freezerReceiptTable indicates the name of the freezer receipts table.
+	freezerReceiptTable = "receipts"
+
+	// freezerDifficultyTable indicates the name of the freezer total difficulty table.
+	freezerDifficultyTable = "diffs"
+)
+
+// freezerNoSnappy configures whether compression is disabled for the ancient-tables.
+// Hashes and difficulties don't compress well.
+var freezerNoSnappy = map[string]bool{
+	freezerHeaderTable:     false,
+	freezerHashTable:       true,
+	freezerBodiesTable:     false,
+	freezerReceiptTable:    false,
+	freezerDifficultyTable: true,
+}
+
+// LegacyTxLookupEntry is the legacy TxLookupEntry definition with some unnecessary
+// fields.
+type LegacyTxLookupEntry struct {
+	BlockHash  common.Hash
+	BlockIndex uint64
+	Index      uint64
+}
+
+// encodeBlockNumber encodes a block number as big endian uint64
+func encodeBlockNumber(number uint64) []byte {
+	enc := make([]byte, 8)
+	binary.BigEndian.PutUint64(enc, number)
+	return enc
+}
+
+// headerKeyPrefix = headerPrefix + num (uint64 big endian)
+func headerKeyPrefix(number uint64) []byte {
+	return append(headerPrefix, encodeBlockNumber(number)...)
+}
+
+// headerKey = headerPrefix + num (uint64 big endian) + hash
+func headerKey(number uint64, hash common.Hash) []byte {
+	return append(append(headerPrefix, encodeBlockNumber(number)...), hash.Bytes()...)
+}
+
+// headerTDKey = headerPrefix + num (uint64 big endian) + hash + headerTDSuffix
+func headerTDKey(number uint64, hash common.Hash) []byte {
+	return append(headerKey(number, hash), headerTDSuffix...)
+}
+
+// headerHashKey = headerPrefix + num (uint64 big endian) + headerHashSuffix
+func headerHashKey(number uint64) []byte {
+	return append(append(headerPrefix, encodeBlockNumber(number)...), headerHashSuffix...)
+}
+
+// headerNumberKey = headerNumberPrefix + hash
+func headerNumberKey(hash common.Hash) []byte {
+	return append(headerNumberPrefix, hash.Bytes()...)
+}
+
+// blockBodyKey = blockBodyPrefix + num (uint64 big endian) + hash
+func blockBodyKey(number uint64, hash common.Hash) []byte {
+	return append(append(blockBodyPrefix, encodeBlockNumber(number)...), hash.Bytes()...)
+}
+
+// blockReceiptsKey = blockReceiptsPrefix + num (uint64 big endian) + hash
+func blockReceiptsKey(number uint64, hash common.Hash) []byte {
+	return append(append(blockReceiptsPrefix, encodeBlockNumber(number)...), hash.Bytes()...)
+}
+
+// txLookupKey = txLookupPrefix + hash
+func txLookupKey(hash common.Hash) []byte {
+	return append(txLookupPrefix, hash.Bytes()...)
+}
+
+// bloomBitsKey = bloomBitsPrefix + bit (uint16 big endian) + section (uint64 big endian) + hash
+func bloomBitsKey(bit uint, section uint64, hash common.Hash) []byte {
+	key := append(append(bloomBitsPrefix, make([]byte, 10)...), hash.Bytes()...)
+
+	binary.BigEndian.PutUint16(key[1:], uint16(bit))
+	binary.BigEndian.PutUint64(key[3:], section)
+
+	return key
+}
+
+// preimageKey = preimagePrefix + hash
+func preimageKey(hash common.Hash) []byte {
+	return append(preimagePrefix, hash.Bytes()...)
+}
+
+// configKey = configPrefix + hash
+func configKey(hash common.Hash) []byte {
+	return append(configPrefix, hash.Bytes()...)
+}