nimbus-eth1/nimbus/db/aristo/aristo_sign.nim

68 lines
2.0 KiB
Nim

# nimbus-eth1
# Copyright (c) 2023-2024 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.
## Aristo DB -- Sign Helper
## ========================
##
{.push raises: [].}
import
eth/common,
results,
"."/[aristo_constants, aristo_desc, aristo_get, aristo_hashify, aristo_init,
aristo_merge]
# ------------------------------------------------------------------------------
# Public functions, signature generator
# ------------------------------------------------------------------------------
proc merkleSignBegin*(): MerkleSignRef =
## Start signature calculator for a list of key-value items.
let
db = AristoDbRef.init VoidBackendRef
vid = VertexID(2)
MerkleSignRef(
root: vid,
db: db)
proc merkleSignAdd*(
sdb: MerkleSignRef;
key: openArray[byte];
val: openArray[byte];
) =
## Add key-value item to the signature list. The order of the items to add
## is irrelevant.
if sdb.error == AristoError(0):
sdb.count.inc
discard sdb.db.merge(sdb.root, key, val, VOID_PATH_ID).valueOr:
sdb.`error` = error
sdb.errKey = @key
return
proc merkleSignCommit*(
sdb: MerkleSignRef;
): Result[HashKey,(Blob,AristoError)] =
## Finish with the list, calculate signature and return it.
if sdb.count == 0:
return ok VOID_HASH_KEY
if sdb.error != AristoError(0):
return err((sdb.errKey, sdb.error))
sdb.db.hashify().isOkOr:
let w = (EmptyBlob, error[1])
return err(w)
let hash = sdb.db.getKeyRc(sdb.root).valueOr:
let w = (EmptyBlob, error)
return err(w)
ok hash
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------