2023-05-14 17:43:01 +00:00
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# nimbus-eth1
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2024-02-01 21:27:48 +00:00
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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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{.push raises: [].}
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import
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std/sets,
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eth/[common, trie/nibbles],
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2023-08-25 22:53:59 +00:00
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./aristo_desc/desc_identifiers
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const
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EmptyBlob* = seq[byte].default
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## Useful shortcut (borrowed from `sync/snap/constants.nim`)
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EmptyNibbleSeq* = EmptyBlob.initNibbleRange
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## Useful shortcut (borrowed from `sync/snap/constants.nim`)
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2023-06-22 11:13:24 +00:00
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EmptyVidSeq* = seq[VertexID].default
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## Useful shortcut
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EmptyVidSet* = EmptyVidSeq.toHashSet
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## Useful shortcut
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VOID_CODE_HASH* = EMPTY_CODE_HASH
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## Equivalent of `nil` for `Account` object code hash field
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VOID_HASH_KEY* = HashKey()
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## Void equivalent for Merkle hash value
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VOID_PATH_ID* = PathID()
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## Void equivalent for Merkle hash value
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LEAST_FREE_VID* = 100
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## Vids smaller are used as known state roots and cannot be recycled. Only
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## the `VertexID(1)` state root is used by the `Aristo` methods. The other
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## numbers smaller than `LEAST_FREE_VID` may be used by application
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## functions with fixed assignments of the type of a state root (e.g. for
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## a receipt or a transaction root.)
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2024-02-12 19:37:00 +00:00
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LOOSE_STORAGE_TRIE_COUPLING* = true
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## Enabling the `LOOSE_STORAGE_TRIE_COUPLING` flag a sub-trie is considered
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## empty if the root vertex ID is zero or at least `LEAST_FREE_VID` and
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## there is no vertex available. If the vertex ID is not zero and should
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## be considered as such will affect calculating the Merkel hash node key
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## for an accou.t leaf of payload type `AccountData`.
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##
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## Setting this flag `true` might be helpful for running an API supporting
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## both, a legacy and# the `Aristo` database backend.
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##
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static:
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doAssert 1 < LEAST_FREE_VID # must stay away from `VertexID(1)`
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# End
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