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core: initial version of state snapshots
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| // Copyright 2019 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 | ||
|
|
||
| import ( | ||
| "encoding/binary" | ||
|
|
||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/ethdb" | ||
| "github.com/ethereum/go-ethereum/log" | ||
| ) | ||
|
|
||
| // ReadSnapshotBlock retrieves the number and root of the block whose state is | ||
| // contained in the persisted snapshot. | ||
| func ReadSnapshotBlock(db ethdb.KeyValueReader) (uint64, common.Hash) { | ||
| data, _ := db.Get(snapshotBlockKey) | ||
| if len(data) != 8+common.HashLength { | ||
| return 0, common.Hash{} | ||
| } | ||
| return binary.BigEndian.Uint64(data[:8]), common.BytesToHash(data[8:]) | ||
| } | ||
|
|
||
| // WriteSnapshotBlock stores the number and root of the block whose state is | ||
| // contained in the persisted snapshot. | ||
| func WriteSnapshotBlock(db ethdb.KeyValueWriter, number uint64, root common.Hash) { | ||
| if err := db.Put(snapshotBlockKey, append(encodeBlockNumber(number), root.Bytes()...)); err != nil { | ||
| log.Crit("Failed to store snapsnot block's number and root", "err", err) | ||
| } | ||
| } | ||
|
|
||
| // DeleteSnapshotBlock deletes the number and hash of the block whose state is | ||
| // contained in the persisted snapshot. Since snapshots are not immutable, this | ||
| // method can be used during updates, so a crash or failure will mark the entire | ||
| // snapshot invalid. | ||
| func DeleteSnapshotBlock(db ethdb.KeyValueWriter) { | ||
| if err := db.Delete(snapshotBlockKey); err != nil { | ||
| log.Crit("Failed to remove snapsnot block's number and hash", "err", err) | ||
| } | ||
| } | ||
|
|
||
| // ReadAccountSnapshot retrieves the snapshot entry of an account trie leaf. | ||
| func ReadAccountSnapshot(db ethdb.KeyValueReader, hash common.Hash) []byte { | ||
| data, _ := db.Get(accountSnapshotKey(hash)) | ||
| return data | ||
| } | ||
|
|
||
| // WriteAccountSnapshot stores the snapshot entry of an account trie leaf. | ||
| func WriteAccountSnapshot(db ethdb.KeyValueWriter, hash common.Hash, entry []byte) { | ||
| if err := db.Put(accountSnapshotKey(hash), entry); err != nil { | ||
| log.Crit("Failed to store account snapshot", "err", err) | ||
| } | ||
| } | ||
|
|
||
| // DeleteAccountSnapshot removes the snapshot entry of an account trie leaf. | ||
| func DeleteAccountSnapshot(db ethdb.KeyValueWriter, hash common.Hash) { | ||
| if err := db.Delete(accountSnapshotKey(hash)); err != nil { | ||
| log.Crit("Failed to delete account snapshot", "err", err) | ||
| } | ||
| } | ||
|
|
||
| // ReadStorageSnapshot retrieves the snapshot entry of an storage trie leaf. | ||
| func ReadStorageSnapshot(db ethdb.KeyValueReader, accountHash, storageHash common.Hash) []byte { | ||
| data, _ := db.Get(storageSnapshotKey(accountHash, storageHash)) | ||
| return data | ||
| } | ||
|
|
||
| // WriteStorageSnapshot stores the snapshot entry of an storage trie leaf. | ||
| func WriteStorageSnapshot(db ethdb.KeyValueWriter, accountHash, storageHash common.Hash, entry []byte) { | ||
| if err := db.Put(storageSnapshotKey(accountHash, storageHash), entry); err != nil { | ||
| log.Crit("Failed to store storage snapshot", "err", err) | ||
| } | ||
| } | ||
|
|
||
| // DeleteStorageSnapshot removes the snapshot entry of an storage trie leaf. | ||
| func DeleteStorageSnapshot(db ethdb.KeyValueWriter, accountHash, storageHash common.Hash) { | ||
| if err := db.Delete(storageSnapshotKey(accountHash, storageHash)); err != nil { | ||
| log.Crit("Failed to delete storage snapshot", "err", err) | ||
| } | ||
| } | ||
|
|
||
| // IterateStorageSnapshots returns an iterator for walking the entire storage | ||
| // space of a specific account. | ||
| func IterateStorageSnapshots(db ethdb.Iteratee, accountHash common.Hash) ethdb.Iterator { | ||
| return db.NewIteratorWithPrefix(storageSnapshotsKey(accountHash)) | ||
| } |
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