mirror of
https://github.com/ethereum/go-ethereum.git
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fdf99d9883
This PR implements flat-file storage for finalized block access lists, specifically: * The freezer is extended with the notion of tail groups, allowing different groups within a single freezer instance to maintain independent tails, while all tables within the same group remain tail-aligned. * The freezer can now dynamically attach new tables to an existing freezer instance, with both the table head and tail initialized to the freezer's common head. * A new freezer table, **bals**, has been added to the chain freezer with its own dedicated tail group, preserving the flexibility to deploy a tail-pruning policy different from the main chain data group. Additionally, the BALs in the key-value store will be migrated to the freezer instance once they are finalized or there are at least 90K block confirmations on top acting as a "soft finalization". This freezing policy is same with all chain segment data.
152 lines
3.9 KiB
Go
152 lines
3.9 KiB
Go
// Copyright 2022 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 remotedb implements the key-value database layer based on a remote geth
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// node. Under the hood, it utilises the `debug_dbGet` method to implement a
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// read-only database.
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// There really are no guarantees in this database, since the local geth does not
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// exclusive access, but it can be used for basic diagnostics of a remote node.
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package remotedb
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import (
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/rpc"
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)
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// Database is a key-value lookup for a remote database via debug_dbGet.
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type Database struct {
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remote *rpc.Client
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}
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func (db *Database) Has(key []byte) (bool, error) {
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if _, err := db.Get(key); err != nil {
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return false, err
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}
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return true, nil
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}
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func (db *Database) Get(key []byte) ([]byte, error) {
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var resp hexutil.Bytes
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err := db.remote.Call(&resp, "debug_dbGet", hexutil.Bytes(key))
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if err != nil {
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return nil, err
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}
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return resp, nil
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}
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func (db *Database) Ancient(kind string, number uint64) ([]byte, error) {
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var resp hexutil.Bytes
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err := db.remote.Call(&resp, "debug_dbAncient", kind, number)
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if err != nil {
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return nil, err
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}
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return resp, nil
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}
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func (db *Database) AncientRange(kind string, start, count, maxBytes uint64) ([][]byte, error) {
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panic("not supported")
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}
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func (db *Database) Ancients() (uint64, error) {
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var resp uint64
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err := db.remote.Call(&resp, "debug_dbAncients")
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return resp, err
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}
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func (db *Database) Tail(group string) (uint64, error) {
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panic("not supported")
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}
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func (db *Database) AncientSize(kind string) (uint64, error) {
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panic("not supported")
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}
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func (db *Database) ReadAncients(fn func(op ethdb.AncientReaderOp) error) (err error) {
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return fn(db)
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}
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func (db *Database) Put(key []byte, value []byte) error {
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panic("not supported")
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}
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func (db *Database) Delete(key []byte) error {
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panic("not supported")
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}
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func (db *Database) DeleteRange(start, end []byte) error {
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panic("not supported")
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}
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func (db *Database) ModifyAncients(f func(ethdb.AncientWriteOp) error) (int64, error) {
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panic("not supported")
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}
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func (db *Database) TruncateHead(n uint64) (uint64, error) {
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panic("not supported")
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}
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func (db *Database) TruncateTail(group string, n uint64) (uint64, error) {
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panic("not supported")
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}
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func (db *Database) SyncAncient() error {
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return nil
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}
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func (db *Database) NewBatch() ethdb.Batch {
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panic("not supported")
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}
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func (db *Database) NewBatchWithSize(size int) ethdb.Batch {
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panic("not supported")
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}
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func (db *Database) NewIterator(prefix []byte, start []byte) ethdb.Iterator {
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panic("not supported")
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}
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func (db *Database) Stat() (string, error) {
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return "", nil
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}
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func (db *Database) AncientDatadir() (string, error) {
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panic("not supported")
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}
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func (db *Database) Compact(start []byte, limit []byte) error {
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return nil
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}
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func (db *Database) SyncKeyValue() error {
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return nil
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}
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func (db *Database) Close() error {
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db.remote.Close()
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return nil
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}
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func (db *Database) AncientBytes(kind string, id, offset, length uint64) ([]byte, error) {
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panic("not supported")
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}
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func New(client *rpc.Client) ethdb.Database {
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if client == nil {
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return nil
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}
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return &Database{remote: client}
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}
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