mirror of
https://github.com/status-im/nimbus-eth1.git
synced 2025-02-12 03:57:05 +00:00
4b66f93274
* Generalised Aristo DB constructor for any type of backend
details:
* Records to be deleted are represented as key-void (rather than
key-value) pairs by the put-function arguments
* Allow direct driver access, iterators as example implementation and
for testing.
* Provide backend storage interface
details:
Stores the top layer onto backend tables
* Implemented Rocks DB backend
details:
Transaction based `put()` functionality
Iterators (based on direct RocksDB access)
44 lines
1.3 KiB
Nim
44 lines
1.3 KiB
Nim
# nimbus-eth1
|
|
# Copyright (c) 2021 Status Research & Development GmbH
|
|
# Licensed under either of
|
|
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
|
|
# http://www.apache.org/licenses/LICENSE-2.0)
|
|
# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
|
|
# http://opensource.org/licenses/MIT)
|
|
# at your option. This file may not be copied, modified, or distributed
|
|
# except according to those terms.
|
|
|
|
## Rocks DB fetch data record
|
|
## ==========================
|
|
|
|
{.push raises: [].}
|
|
|
|
import
|
|
eth/common,
|
|
rocksdb,
|
|
stew/results,
|
|
"../.."/[aristo_constants, aristo_desc],
|
|
./rdb_desc
|
|
|
|
# ------------------------------------------------------------------------------
|
|
# Public functions
|
|
# ------------------------------------------------------------------------------
|
|
|
|
proc get*(
|
|
rdb: RdbInst;
|
|
key: openArray[byte],
|
|
): Result[Blob,(AristoError,string)] =
|
|
var res: Blob
|
|
let onData: DataProc = proc(data: openArray[byte]) =
|
|
res = @data
|
|
let rc = rdb.store.get(key, onData)
|
|
if rc.isErr:
|
|
return err((RdbBeDriverGetError,rc.error))
|
|
if not rc.value:
|
|
res = EmptyBlob
|
|
ok res
|
|
|
|
# ------------------------------------------------------------------------------
|
|
# End
|
|
# ------------------------------------------------------------------------------
|