46 lines
1.3 KiB
Nim
46 lines
1.3 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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{.push raises: [].}
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import
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std/sets,
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eth/common,
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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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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_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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static:
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# must stay away from `VertexID(1)` and `VertexID(2)`
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doAssert 2 < LEAST_FREE_VID
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# End
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