mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-22 19:40:36 +00:00
743e404906
This PR introduces a node scheme abstraction. The interface is only implemented by `hashScheme` at the moment, but will be extended by `pathScheme` very soon. Apart from that, a few changes are also included which is worth mentioning: - port the changes in the stacktrie, tracking the path prefix of nodes during commit - use ethdb.Database for constructing trie.Database. This is not necessary right now, but it is required for path-based used to open reverse diff freezer
97 lines
3.7 KiB
Go
97 lines
3.7 KiB
Go
// Copyright 2021 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 trie
|
|
|
|
import (
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/core/rawdb"
|
|
"github.com/ethereum/go-ethereum/ethdb"
|
|
)
|
|
|
|
const (
|
|
HashScheme = "hashScheme" // Identifier of hash based node scheme
|
|
|
|
// Path-based scheme will be introduced in the following PRs.
|
|
// PathScheme = "pathScheme" // Identifier of path based node scheme
|
|
)
|
|
|
|
// NodeScheme describes the scheme for interacting nodes in disk.
|
|
type NodeScheme interface {
|
|
// Name returns the identifier of node scheme.
|
|
Name() string
|
|
|
|
// HasTrieNode checks the trie node presence with the provided node info and
|
|
// the associated node hash.
|
|
HasTrieNode(db ethdb.KeyValueReader, owner common.Hash, path []byte, hash common.Hash) bool
|
|
|
|
// ReadTrieNode retrieves the trie node from database with the provided node
|
|
// info and the associated node hash.
|
|
ReadTrieNode(db ethdb.KeyValueReader, owner common.Hash, path []byte, hash common.Hash) []byte
|
|
|
|
// WriteTrieNode writes the trie node into database with the provided node
|
|
// info and associated node hash.
|
|
WriteTrieNode(db ethdb.KeyValueWriter, owner common.Hash, path []byte, hash common.Hash, node []byte)
|
|
|
|
// DeleteTrieNode deletes the trie node from database with the provided node
|
|
// info and associated node hash.
|
|
DeleteTrieNode(db ethdb.KeyValueWriter, owner common.Hash, path []byte, hash common.Hash)
|
|
|
|
// IsTrieNode returns an indicator if the given database key is the key of
|
|
// trie node according to the scheme.
|
|
IsTrieNode(key []byte) (bool, []byte)
|
|
}
|
|
|
|
type hashScheme struct{}
|
|
|
|
// Name returns the identifier of hash based scheme.
|
|
func (scheme *hashScheme) Name() string {
|
|
return HashScheme
|
|
}
|
|
|
|
// HasTrieNode checks the trie node presence with the provided node info and
|
|
// the associated node hash.
|
|
func (scheme *hashScheme) HasTrieNode(db ethdb.KeyValueReader, owner common.Hash, path []byte, hash common.Hash) bool {
|
|
return rawdb.HasTrieNode(db, hash)
|
|
}
|
|
|
|
// ReadTrieNode retrieves the trie node from database with the provided node info
|
|
// and associated node hash.
|
|
func (scheme *hashScheme) ReadTrieNode(db ethdb.KeyValueReader, owner common.Hash, path []byte, hash common.Hash) []byte {
|
|
return rawdb.ReadTrieNode(db, hash)
|
|
}
|
|
|
|
// WriteTrieNode writes the trie node into database with the provided node info
|
|
// and associated node hash.
|
|
func (scheme *hashScheme) WriteTrieNode(db ethdb.KeyValueWriter, owner common.Hash, path []byte, hash common.Hash, node []byte) {
|
|
rawdb.WriteTrieNode(db, hash, node)
|
|
}
|
|
|
|
// DeleteTrieNode deletes the trie node from database with the provided node info
|
|
// and associated node hash.
|
|
func (scheme *hashScheme) DeleteTrieNode(db ethdb.KeyValueWriter, owner common.Hash, path []byte, hash common.Hash) {
|
|
rawdb.DeleteTrieNode(db, hash)
|
|
}
|
|
|
|
// IsTrieNode returns an indicator if the given database key is the key of trie
|
|
// node according to the scheme.
|
|
func (scheme *hashScheme) IsTrieNode(key []byte) (bool, []byte) {
|
|
if len(key) == common.HashLength {
|
|
return true, key
|
|
}
|
|
return false, nil
|
|
}
|