112 lines
3.6 KiB
Nim
112 lines
3.6 KiB
Nim
# Nimbus
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# Copyright (c) 2018 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 except
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# according to those terms.
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##
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## Tools & Utils for Clique PoA Consensus Protocol
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## ===============================================
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##
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## For details see
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## `EIP-225 <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-225.md>`_
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## and
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## `go-ethereum <https://github.com/ethereum/EIPs/blob/master/EIPS/eip-225.md>`_
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##
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import
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std/[algorithm, times],
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../../constants,
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../../utils,
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./clique_defs,
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eth/[common, rlp],
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stew/[objects, results],
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stint
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type
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EthSortOrder* = enum
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EthDescending = SortOrder.Descending.ord
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EthAscending = SortOrder.Ascending.ord
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{.push raises: [Defect].}
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# ------------------------------------------------------------------------------
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# Private helpers
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# ------------------------------------------------------------------------------
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func zeroItem[T](t: typedesc[T]): T =
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discard
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# ------------------------------------------------------------------------------
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# Public functions
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# ------------------------------------------------------------------------------
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proc isZero*[T: EthAddress|Hash256|Duration](a: T): bool =
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## `true` if `a` is all zero
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a == zeroItem(T)
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proc sorted*(e: openArray[EthAddress]; order = EthAscending): seq[EthAddress] =
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proc eCmp(x, y: EthAddress): int =
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for n in 0 ..< x.len:
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if x[n] < y[n]:
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return -1
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elif y[n] < x[n]:
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return 1
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e.sorted(cmp = eCmp, order = order.SortOrder)
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proc cliqueResultErr*(w: CliqueError): CliqueOkResult =
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## Return error result (syntactic sugar)
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err(w)
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proc extraDataAddresses*(extraData: Blob): seq[EthAddress] =
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## Extract signer addresses from extraData header field
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proc toEthAddress(a: openArray[byte]; start: int): EthAddress =
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toArray(EthAddress.len, a[start ..< start + EthAddress.len])
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if EXTRA_VANITY + EXTRA_SEAL < extraData.len and
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((extraData.len - (EXTRA_VANITY + EXTRA_SEAL)) mod EthAddress.len) == 0:
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var addrOffset = EXTRA_VANITY
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while addrOffset + EthAddress.len <= extraData.len - EXTRA_SEAL:
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result.add extraData.toEthAddress(addrOffset)
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addrOffset += EthAddress.len
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# core/types/block.go(343): func (b *Block) WithSeal(header [..]
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proc withHeader*(b: EthBlock; header: BlockHeader): EthBlock =
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## New block with the data from `b` but the header replaced with the
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## argument one.
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EthBlock(header: header,
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txs: b.txs,
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uncles: b.uncles)
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# ------------------------------------------------------------------------------
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# Seal hash support
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# ------------------------------------------------------------------------------
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# clique/clique.go(730): func encodeSigHeader(w [..]
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proc encodeSealHeader*(header: BlockHeader): seq[byte] =
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## Cut sigature off `extraData` header field and consider new `baseFee`
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## field for Eip1559.
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doAssert EXTRA_SEAL < header.extraData.len
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var rlpHeader = header
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rlpHeader.extraData.setLen(header.extraData.len - EXTRA_SEAL)
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rlp.encode(rlpHeader)
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# clique/clique.go(688): func SealHash(header *types.Header) common.Hash {
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proc hashSealHeader*(header: BlockHeader): Hash256 =
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## Returns the hash of a block prior to it being sealed.
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header.encodeSealHeader.keccakHash
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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