68 lines
2.0 KiB
Nim
68 lines
2.0 KiB
Nim
# nimbus-eth1
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# Copyright (c) 2023-2024 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed
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# except according to those terms.
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## Aristo DB -- Sign Helper
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## ========================
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##
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{.push raises: [].}
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import
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eth/common,
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results,
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"."/[aristo_constants, aristo_desc, aristo_get, aristo_hashify, aristo_init,
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aristo_merge]
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# ------------------------------------------------------------------------------
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# Public functions, signature generator
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# ------------------------------------------------------------------------------
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proc merkleSignBegin*(): MerkleSignRef =
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## Start signature calculator for a list of key-value items.
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let
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db = AristoDbRef.init VoidBackendRef
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vid = VertexID(2)
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MerkleSignRef(
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root: vid,
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db: db)
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proc merkleSignAdd*(
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sdb: MerkleSignRef;
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key: openArray[byte];
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val: openArray[byte];
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) =
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## Add key-value item to the signature list. The order of the items to add
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## is irrelevant.
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if sdb.error == AristoError(0):
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sdb.count.inc
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discard sdb.db.merge(sdb.root, key, val, VOID_PATH_ID).valueOr:
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sdb.`error` = error
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sdb.errKey = @key
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return
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proc merkleSignCommit*(
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sdb: MerkleSignRef;
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): Result[HashKey,(Blob,AristoError)] =
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## Finish with the list, calculate signature and return it.
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if sdb.count == 0:
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return ok VOID_HASH_KEY
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if sdb.error != AristoError(0):
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return err((sdb.errKey, sdb.error))
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sdb.db.hashify().isOkOr:
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let w = (EmptyBlob, error[1])
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return err(w)
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let hash = sdb.db.getKeyRc(sdb.root).valueOr:
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let w = (EmptyBlob, error)
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return err(w)
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ok hash
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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