46 lines
1.8 KiB
Nim
46 lines
1.8 KiB
Nim
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# beacon_chain
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# Copyright (c) 2018-2021 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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{.push raises: [Defect].}
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{.pragma: raisesssz, raises: [Defect, MalformedSszError, SszSizeMismatchError].}
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import
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std/[typetraits],
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../ssz/codec,
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../spec/datatypes/[phase0, altair],
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./eth2_merkleization
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export codec, phase0, altair, typetraits, eth2_merkleization
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# Coding and decoding of SSZ to spec-specific types
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template toSszType*(v: Slot|Epoch): auto = uint64(v)
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template toSszType*(v: BlsCurveType): auto = toRaw(v)
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template toSszType*(v: ForkDigest|GraffitiBytes): auto = distinctBase(v)
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template toSszType*(v: Version): auto = distinctBase(v)
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func fromSszBytes*(T: type GraffitiBytes, data: openArray[byte]): T {.raisesssz.} =
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if data.len != sizeof(result):
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raiseIncorrectSize T
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copyMem(result.addr, unsafeAddr data[0], sizeof(result))
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template fromSszBytes*(T: type Slot, bytes: openArray[byte]): T =
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T fromSszBytes(uint64, bytes)
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template fromSszBytes*(T: type Epoch, bytes: openArray[byte]): T =
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T fromSszBytes(uint64, bytes)
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func fromSszBytes*(T: type ForkDigest, bytes: openArray[byte]): T {.raisesssz.} =
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if bytes.len != sizeof(result):
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raiseIncorrectSize T
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copyMem(result.addr, unsafeAddr bytes[0], sizeof(result))
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func fromSszBytes*(T: type Version, bytes: openArray[byte]): T {.raisesssz.} =
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if bytes.len != sizeof(result):
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raiseIncorrectSize T
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copyMem(result.addr, unsafeAddr bytes[0], sizeof(result))
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