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cmd/geth: implement data import and export (#22931)

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This PR offers two more database sub commands for exporting and importing data.
Two exporters are implemented: preimage and snapshot data respectively. 
The import command is generic, it can take any data export and import into leveldb. 
The data format has a 'magic' for disambiguation, and a version field for future compatibility.
This commit is contained in:
rjl493456442
2021-11-02 18:31:45 +08:00
committed by GitHub
parent 551bd6e721
commit 2e8b58f076
7 changed files with 590 additions and 15 deletions
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10
core/rawdb/schema.go
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@ -48,8 +48,8 @@ var (
// snapshotDisabledKey flags that the snapshot should not be maintained due to initial sync.
snapshotDisabledKey = []byte("SnapshotDisabled")
// snapshotRootKey tracks the hash of the last snapshot.
snapshotRootKey = []byte("SnapshotRoot")
// SnapshotRootKey tracks the hash of the last snapshot.
SnapshotRootKey = []byte("SnapshotRoot")
// snapshotJournalKey tracks the in-memory diff layers across restarts.
snapshotJournalKey = []byte("SnapshotJournal")
@ -90,7 +90,7 @@ var (
SnapshotStoragePrefix = []byte("o") // SnapshotStoragePrefix + account hash + storage hash -> storage trie value
CodePrefix = []byte("c") // CodePrefix + code hash -> account code
preimagePrefix = []byte("secure-key-") // preimagePrefix + hash -> preimage
PreimagePrefix = []byte("secure-key-") // PreimagePrefix + hash -> preimage
configPrefix = []byte("ethereum-config-") // config prefix for the db
// Chain index prefixes (use `i` + single byte to avoid mixing data types).
@ -207,9 +207,9 @@ func bloomBitsKey(bit uint, section uint64, hash common.Hash) []byte {
return key
}
// preimageKey = preimagePrefix + hash
// preimageKey = PreimagePrefix + hash
func preimageKey(hash common.Hash) []byte {
return append(preimagePrefix, hash.Bytes()...)
return append(PreimagePrefix, hash.Bytes()...)
}
// codeKey = CodePrefix + hash