61 lines
1.9 KiB
Nim
61 lines
1.9 KiB
Nim
# Nimbus
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# Copyright (c) 2022-2023 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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# https://github.com/ethereum/portal-network-specs/blob/master/header-gossip-network.md
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{.push raises: [].}
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import
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std/options,
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nimcrypto/[sha2, hash], stint,
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ssz_serialization,
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../../common/common_types
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export ssz_serialization, common_types, options, hash
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type
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# Header Gossip Content Keys
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# https://github.com/ethereum/portal-network-specs/blob/master/header-gossip-network.md#content-keys
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# But with Accumulator removed as per
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# https://github.com/ethereum/portal-network-specs/issues/153
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ContentType* = enum
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newBlockHeader = 0x00
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# TODO: remove or fix this temporary
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# dummySelector per latest spec.
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# This is temporary workaround
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# to fool SSZ.isUnion
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dummySelector = 0x01
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NewBlockHeaderKey* = object
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blockHash*: BlockHash
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blockNumber*: UInt256
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ContentKey* = object
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case contentType*: ContentType
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of newBlockHeader:
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newBlockHeaderKey*: NewBlockHeaderKey
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of dummySelector:
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dummyField: uint64
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func encode*(contentKey: ContentKey): ByteList =
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ByteList.init(SSZ.encode(contentKey))
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func decode*(contentKey: ByteList): Option[ContentKey] =
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try:
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some(SSZ.decode(contentKey.asSeq(), ContentKey))
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except SerializationError:
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return none[ContentKey]()
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func toContentId*(contentKey: ByteList): ContentId =
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# TODO: Should we try to parse the content key here for invalid ones?
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let idHash = sha2.sha256.digest(contentKey.asSeq())
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readUintBE[256](idHash.data)
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func toContentId*(contentKey: ContentKey): ContentId =
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toContentId(encode(contentKey))
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