nim-eth/eth/trie/trie_defs.nim

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import
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eth/rlp, stew/ranges/typedranges, nimcrypto/hash
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export
typedranges, Bytes
type
KeccakHash* = MDigest[256]
BytesContainer* = ByteRange | Bytes | string
TrieError* = object of CatchableError
# A common base type of all Trie errors.
PersistenceFailure* = object of TrieError
# The backing database of the trie was not able to carry out
# the storage or retrieval request.
CorruptedTrieDatabase* = object of Defect
# We consider this a Defect, because the software cannot safely
# operate if its database has been tampered with. A swift crash
# will be a more appropriate response.
# can't be a const: https://github.com/status-im/nim-eth/issues/6
# we can't initialise it here, but since it's already zeroed memory, we don't need to
var zeroBytesRange* {.threadvar.}: ByteRange
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const
blankStringHash* = "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470".toDigest
emptyRlp* = @[128.byte]
emptyRlpHash* = "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421".toDigest
proc read*(rlp: var Rlp, T: typedesc[MDigest]): T {.inline.} =
result.data = rlp.read(type(result.data))
proc append*(rlpWriter: var RlpWriter, a: MDigest) {.inline.} =
rlpWriter.append(a.data)
proc unnecessary_OpenArrayToRange*(key: openarray[byte]): ByteRange =
## XXX: The name of this proc is intentionally long, because it
## performs a memory allocation and data copying that may be eliminated
## in the future. Avoid renaming it to something similar as `toRange`, so
## it can remain searchable in the code.
toRange(@key)