106 lines
2.9 KiB
Nim
106 lines
2.9 KiB
Nim
# fluffy
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# Copyright (c) 2021-2024 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: [].}
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import
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nimcrypto/[sha2, hash],
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stew/byteutils,
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results,
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stint,
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ssz_serialization,
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../../../common/common_types
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export ssz_serialization, common_types, hash, results
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## History network content keys:
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## https://github.com/ethereum/portal-network-specs/blob/master/history-network.md#content-keys-and-values
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const
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# Maximum content key size:
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# - 32 bytes for SSZ serialized `BlockKey`
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# - 1 byte for `ContentType`
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maxContentKeySize* = 33
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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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blockNumber = 0x03
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BlockKey* = object
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blockHash*: BlockHash
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BlockNumberKey* = object
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blockNumber*: uint64
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ContentKey* = object
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case contentType*: ContentType
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of blockHeader:
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blockHeaderKey*: BlockKey
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of blockBody:
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blockBodyKey*: BlockKey
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of receipts:
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receiptsKey*: BlockKey
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of blockNumber:
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blockNumberKey*: BlockNumberKey
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func blockHeaderContentKey*(id: BlockHash | uint64): ContentKey =
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when id is BlockHash:
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ContentKey(contentType: blockHeader, blockHeaderKey: BlockKey(blockHash: id))
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else:
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ContentKey(
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contentType: blockNumber, blockNumberKey: BlockNumberKey(blockNumber: id)
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)
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func blockBodyContentKey*(hash: BlockHash): ContentKey =
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ContentKey(contentType: blockBody, blockBodyKey: BlockKey(blockHash: hash))
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func receiptsContentKey*(hash: BlockHash): ContentKey =
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ContentKey(contentType: receipts, receiptsKey: BlockKey(blockHash: hash))
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func encode*(contentKey: ContentKey): ContentKeyByteList =
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ContentKeyByteList.init(SSZ.encode(contentKey))
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func decode*(contentKey: ContentKeyByteList): Opt[ContentKey] =
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try:
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Opt.some(SSZ.decode(contentKey.asSeq(), ContentKey))
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except SerializationError:
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return Opt.none(ContentKey)
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func toContentId*(contentKey: ContentKeyByteList): 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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func `$`*(x: BlockHash): string =
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"0x" & x.data.toHex()
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func `$`*(x: BlockKey): string =
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"blockHash: " & $x.blockHash
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func `$`*(x: ContentKey): string =
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var res = "(type: " & $x.contentType & ", "
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case x.contentType
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of blockHeader:
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res.add($x.blockHeaderKey)
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of blockBody:
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res.add($x.blockBodyKey)
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of receipts:
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res.add($x.receiptsKey)
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of blockNumber:
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res.add($x.blockNumberKey)
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res.add(")")
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res
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