72 lines
2.0 KiB
Nim
72 lines
2.0 KiB
Nim
# Nimbus
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# Copyright (c) 2021-2022 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/history-network.md#content-keys-and-values
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{.push raises: [Defect].}
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import
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std/options,
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nimcrypto/[sha2, hash], stew/byteutils, stint,
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ssz_serialization,
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../../common/common_types
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export ssz_serialization, common_types
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type
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ContentType* = enum
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blockHeader = 0x00
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blockBody = 0x01
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receipts = 0x02
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ContentKeyType* = object
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chainId*: uint16
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blockHash*: BlockHash
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ContentKey* = object
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case contentType*: ContentType
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of blockHeader:
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blockHeaderKey*: ContentKeyType
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of blockBody:
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blockBodyKey*: ContentKeyType
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of receipts:
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receiptsKey*: ContentKeyType
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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 SszError:
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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.sha_256.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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func `$`*(x: BlockHash): string =
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"0x" & x.data.toHex()
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func `$`*(x: ContentKey): string =
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let key =
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case x.contentType:
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of blockHeader:
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x.blockHeaderKey
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of blockBody:
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x.blockBodyKey
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of receipts:
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x.receiptsKey
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"(contentType: " & $x.contentType &
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", blockHash: " & $key.blockHash &
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", chainId: " & $key.chainId & ")"
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