nimbus-eth1/tests/test_aristo/undump_desc.nim

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# Nimbus
# Copyright (c) 2018-2024 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.
{.push raises: [].}
import
eth/common,
stint,
../../nimbus/sync/[protocol, types]
## Stripped down version of `sync/snap/range_desc` in order to decode the
## snap sync dump samples.
##
## While the details of the dumped data have mostly outlived their purpuse,
## its use as **entropy** data thrown against `Aristo` has still been useful
## to find/debug tricky DB problems.
type
ByteArray32* = array[32,byte]
## Used for 32 byte database keys
NodeKey* = distinct ByteArray32
## Hash key without the hash wrapper (as opposed to `NodeTag` which is a
## number.)
NodeTag* = distinct UInt256
## Trie leaf item, account hash etc. This data type is a representation
## for a `NodeKey` geared up for arithmetic and comparing keys.
PackedAccountRange* = object
## Re-packed version of `SnapAccountRange`. The reason why repacking is
## needed is that the `snap/1` protocol uses another RLP encoding than is
## used for storing in the database. So the `PackedAccount` is `BaseDB`
## trie compatible.
accounts*: seq[PackedAccount] ## List of re-packed accounts data
proof*: seq[SnapProof] ## Boundary proofs
PackedAccount* = object
## In fact, the `snap/1` driver returns the `Account` structure which is
## unwanted overhead, here.
accKey*: NodeKey
accBlob*: Blob
AccountSlotsHeader* = object
## Storage root header
accKey*: NodeKey ## Owner account, maybe unnecessary
storageRoot*: Hash256 ## Start of storage tree
#subRange*: Opt[NodeTagRange] ## Sub-range of slot range covered
AccountStorageRange* = object
## List of storage descriptors, the last `AccountSlots` storage data might
## be incomplete and the `proof` is needed for proving validity.
storages*: seq[AccountSlots] ## List of accounts and storage data
proof*: seq[SnapProof] ## Boundary proofs for last entry
base*: NodeTag ## Lower limit for last entry w/proof
AccountSlots* = object
## Account storage descriptor
account*: AccountSlotsHeader
data*: seq[SnapStorage]
proc to*(tag: NodeTag; T: type Hash256): T =
## Convert to serialised equivalent
result.data = tag.UInt256.toBytesBE
proc to*(key: Hash256; T: type NodeTag): T =
## Syntactic sugar
key.data.NodeKey.to(T)
proc to*(key: NodeKey; T: type NodeTag): T =
## Convert from serialised equivalent
UInt256.fromBytesBE(key.ByteArray32).T
# End