mirror of
https://github.com/ethereum/go-ethereum.git
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a7d9b52eaf
This implements a backing store for chain history based on era1 files. The new store is integrated with the freezer. Queries for blocks and receipts below the current freezer tail are handled by the era store. --------- Co-authored-by: Gary Rong <garyrong0905@gmail.com> Co-authored-by: Felix Lange <fjl@twurst.com> Co-authored-by: lightclient <lightclient@protonmail.com>
148 lines
3.7 KiB
Go
148 lines
3.7 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() (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(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 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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