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ethdb/remotedb, cmd: add support for remote (readonly) databases (eth…
…ereum#24836) * ethdb/remotedb, cmd: add support for remote (readonly) databases * ethdb/remotedb: minor changes * ethdb/remotedb: close the conn * cmd, ethdb: add rpc accessor for ancient data * internal/ethapi: license * ethdb/remotedb: linter fixes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| // Copyright 2022 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 remotedb implements the key-value database layer based on a remote geth | ||
| // node. Under the hood, it utilises the `debug_dbGet` method to implement a | ||
| // read-only database. | ||
| // There really are no guarantees in this database, since the local geth does not | ||
| // exclusive access, but it can be used for basic diagnostics of a remote node. | ||
| package remotedb | ||
|
|
||
| import ( | ||
| "errors" | ||
| "strings" | ||
|
|
||
| "github.com/ethereum/go-ethereum/common/hexutil" | ||
| "github.com/ethereum/go-ethereum/ethdb" | ||
| "github.com/ethereum/go-ethereum/rpc" | ||
| ) | ||
|
|
||
| // Database is a key-value lookup for a remote database via debug_dbGet. | ||
| type Database struct { | ||
| remote *rpc.Client | ||
| } | ||
|
|
||
| func (db *Database) Has(key []byte) (bool, error) { | ||
| if _, err := db.Get(key); err != nil { | ||
| return true, nil | ||
| } | ||
| return false, nil | ||
| } | ||
|
|
||
| func (db *Database) Get(key []byte) ([]byte, error) { | ||
| var resp hexutil.Bytes | ||
| err := db.remote.Call(&resp, "debug_dbGet", hexutil.Bytes(key)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return resp, nil | ||
| } | ||
|
|
||
| func (db *Database) HasAncient(kind string, number uint64) (bool, error) { | ||
| if _, err := db.Ancient(kind, number); err != nil { | ||
| return true, nil | ||
| } | ||
| return false, nil | ||
| } | ||
|
|
||
| func (db *Database) Ancient(kind string, number uint64) ([]byte, error) { | ||
| var resp hexutil.Bytes | ||
| err := db.remote.Call(&resp, "debug_dbAncient", kind, number) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return resp, nil | ||
| } | ||
|
|
||
| func (db *Database) AncientRange(kind string, start, count, maxBytes uint64) ([][]byte, error) { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) Ancients() (uint64, error) { | ||
| var resp uint64 | ||
| err := db.remote.Call(&resp, "debug_dbAncients") | ||
| return resp, err | ||
| } | ||
|
|
||
| func (db *Database) Tail() (uint64, error) { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) AncientSize(kind string) (uint64, error) { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) ReadAncients(fn func(op ethdb.AncientReaderOp) error) (err error) { | ||
| return fn(db) | ||
| } | ||
|
|
||
| func (db *Database) Put(key []byte, value []byte) error { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) Delete(key []byte) error { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) ModifyAncients(f func(ethdb.AncientWriteOp) error) (int64, error) { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) TruncateHead(n uint64) error { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) TruncateTail(n uint64) error { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) Sync() error { | ||
| return nil | ||
| } | ||
|
|
||
| func (db *Database) MigrateTable(s string, f func([]byte) ([]byte, error)) error { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) NewBatch() ethdb.Batch { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) NewBatchWithSize(size int) ethdb.Batch { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) NewIterator(prefix []byte, start []byte) ethdb.Iterator { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) Stat(property string) (string, error) { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) AncientDatadir() (string, error) { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) Compact(start []byte, limit []byte) error { | ||
| return nil | ||
| } | ||
|
|
||
| func (db *Database) NewSnapshot() (ethdb.Snapshot, error) { | ||
| panic("not supported") | ||
| } | ||
|
|
||
| func (db *Database) Close() error { | ||
| db.remote.Close() | ||
| return nil | ||
| } | ||
|
|
||
| func dialRPC(endpoint string) (*rpc.Client, error) { | ||
| if endpoint == "" { | ||
| return nil, errors.New("endpoint must be specified") | ||
| } | ||
| if strings.HasPrefix(endpoint, "rpc:") || strings.HasPrefix(endpoint, "ipc:") { | ||
| // Backwards compatibility with geth < 1.5 which required | ||
| // these prefixes. | ||
| endpoint = endpoint[4:] | ||
| } | ||
| return rpc.Dial(endpoint) | ||
| } | ||
|
|
||
| func New(endpoint string) (ethdb.Database, error) { | ||
| client, err := dialRPC(endpoint) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &Database{ | ||
| remote: client, | ||
| }, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| // Copyright 2022 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 ethapi | ||
|
|
||
| import ( | ||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/common/hexutil" | ||
| ) | ||
|
|
||
| // DbGet returns the raw value of a key stored in the database. | ||
| func (api *PrivateDebugAPI) DbGet(key string) (hexutil.Bytes, error) { | ||
| blob, err := common.ParseHexOrString(key) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return api.b.ChainDb().Get(blob) | ||
| } | ||
|
|
||
| // DbAncient retrieves an ancient binary blob from the append-only immutable files. | ||
| // It is a mapping to the `AncientReaderOp.Ancient` method | ||
| func (api *PrivateDebugAPI) DbAncient(kind string, number uint64) (hexutil.Bytes, error) { | ||
| return api.b.ChainDb().Ancient(kind, number) | ||
| } | ||
|
|
||
| // DbAncients returns the ancient item numbers in the ancient store. | ||
| // It is a mapping to the `AncientReaderOp.Ancients` method | ||
| func (api *PrivateDebugAPI) DbAncients() (uint64, error) { | ||
| return api.b.ChainDb().Ancients() | ||
| } |
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