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nimbus-eth1/nimbus/common/common.nim

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# Nimbus
# Copyright (c) 2022 Status Research & Development GmbH
# Licensed under either of
# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
# * MIT license ([LICENSE-MIT](LICENSE-MIT))
# at your option.
# This file may not be copied, modified, or distributed except according to
# those terms.
{.push raises: [].}
import
std/[options],
chronicles,
eth/trie/trie_defs,
./chain_config,
./hardforks,
./evmforks,
./genesis,
../utils/[utils, ec_recover],
../db/[db_chain, storage_types],
../core/[pow, clique, casper]
export
chain_config,
db_chain,
options,
evmforks,
hardforks,
genesis,
utils
type
SyncProgress = object
start : BlockNumber
current: BlockNumber
highest: BlockNumber
SyncReqNewHeadCB* = proc(header: BlockHeader) {.gcsafe, raises: [].}
## Update head for syncing
CommonRef* = ref object
# all purpose storage
db: ChainDBRef
# prune underlying state db?
pruneTrie: bool
# block chain config
config: ChainConfig
# cache of genesis
genesisHash: KeccakHash
genesisHeader: BlockHeader
# map block number and ttd and time to
# HardFork
forkTransitionTable: ForkTransitionTable
# Eth wire protocol need this
forkIds: array[HardFork, ForkID]
networkId: NetworkId
# synchronizer need this
syncProgress: SyncProgress
# current hard fork, updated after calling `hardForkTransition`
currentFork: HardFork
# one of POW/POA/POS, updated after calling `hardForkTransition`
consensusType: ConsensusType
syncReqNewHead: SyncReqNewHeadCB
pow: PowRef ##\
## Wrapper around `hashimotoLight()` and lookup cache
poa: Clique ##\
## For non-PoA networks this descriptor is ignored.
pos: CasperRef
## Proof Of Stake descriptor
# ------------------------------------------------------------------------------
# Forward declarations
# ------------------------------------------------------------------------------
proc hardForkTransition*(com: CommonRef, forkDeterminer: ForkDeterminationInfo) {.gcsafe, raises: [CatchableError].}
func cliquePeriod*(com: CommonRef): int
func cliqueEpoch*(com: CommonRef): int
# ------------------------------------------------------------------------------
# Private helper functions
# ------------------------------------------------------------------------------
proc consensusTransition(com: CommonRef, fork: HardFork) =
if fork >= MergeFork:
com.consensusType = ConsensusType.POS
else:
# restore consensus type to original config
# this could happen during reorg
com.consensusType = com.config.consensusType
proc setForkId(com: CommonRef, blockZero: BlockHeader) =
com.genesisHash = blockZero.blockHash
let genesisCRC = crc32(0, com.genesisHash.data)
com.forkIds = calculateForkIds(com.config, genesisCRC)
proc daoCheck(conf: ChainConfig) =
if not conf.daoForkSupport or conf.daoForkBlock.isNone:
conf.daoForkBlock = conf.homesteadBlock
if conf.daoForkSupport and conf.daoForkBlock.isNone:
conf.daoForkBlock = conf.homesteadBlock
proc init(com : CommonRef,
db : TrieDatabaseRef,
pruneTrie: bool,
networkId: NetworkId,
config : ChainConfig,
genesis : Genesis) {.gcsafe, raises: [CatchableError].} =
config.daoCheck()
com.db = ChainDBRef.new(db)
com.pruneTrie = pruneTrie
com.config = config
com.forkTransitionTable = config.toForkTransitionTable()
com.networkId = networkId
com.syncProgress= SyncProgress()
# com.currentFork and com.consensusType
# is set by hardForkTransition.
# set it before creating genesis block
# TD need to be some(0.u256) because it can be the genesis
# already at the MergeFork
let optionalGenesisTime = if genesis.isNil: none[EthTime]() else: some(genesis.timestamp)
com.hardForkTransition(ForkDeterminationInfo(blockNumber: 0.toBlockNumber, td: some(0.u256), time: optionalGenesisTime))
# com.forkIds and com.blockZeroHash is set
# by setForkId
if genesis.isNil.not:
com.genesisHeader = toGenesisHeader(genesis,
com.currentFork, com.db.db)
com.setForkId(com.genesisHeader)
# Initalise the PoA state regardless of whether it is needed on the current
# network. For non-PoA networks this descriptor is ignored.
com.poa = newClique(com.db, com.cliquePeriod, com.cliqueEpoch)
# Always initialise the PoW epoch cache even though it migh no be used
com.pow = PowRef.new
com.pos = CasperRef.new
proc getTd(com: CommonRef, blockHash: Hash256): Option[DifficultyInt] =
var td: DifficultyInt
if not com.db.getTd(blockHash, td):
# TODO: Is this really ok?
none[DifficultyInt]()
else:
some(td)
proc needTdForHardForkDetermination(com: CommonRef): bool =
let t = com.forkTransitionTable.mergeForkTransitionThreshold
t.blockNumber.isNone and t.ttd.isSome
proc getTdIfNecessary(com: CommonRef, blockHash: Hash256): Option[DifficultyInt] =
if needTdForHardForkDetermination(com):
getTd(com, blockHash)
else:
none[DifficultyInt]()
# ------------------------------------------------------------------------------
# Public constructors
# ------------------------------------------------------------------------------
proc new*(_: type CommonRef,
db: TrieDatabaseRef,
pruneTrie: bool = true,
networkId: NetworkId = MainNet,
params = networkParams(MainNet)): CommonRef
{.gcsafe, raises: [CatchableError].} =
## If genesis data is present, the forkIds will be initialized
## empty data base also initialized with genesis block
new(result)
result.init(
db,
pruneTrie,
networkId,
params.config,
params.genesis)
proc new*(_: type CommonRef,
db: TrieDatabaseRef,
config: ChainConfig,
pruneTrie: bool = true,
networkId: NetworkId = MainNet): CommonRef
{.gcsafe, raises: [CatchableError].} =
## There is no genesis data present
## Mainly used for testing without genesis
new(result)
result.init(
db,
pruneTrie,
networkId,
config,
nil)
proc clone*(com: CommonRef, db: TrieDatabaseRef): CommonRef =
## clone but replace the db
## used in EVM tracer whose db is CaptureDB
CommonRef(
db : ChainDBRef.new(db),
pruneTrie : com.pruneTrie,
config : com.config,
forkTransitionTable: com.forkTransitionTable,
forkIds : com.forkIds,
genesisHash : com.genesisHash,
genesisHeader: com.genesisHeader,
syncProgress : com.syncProgress,
networkId : com.networkId,
currentFork : com.currentFork,
consensusType: com.consensusType,
pow : com.pow,
poa : com.poa,
pos : com.pos
)
proc clone*(com: CommonRef): CommonRef =
com.clone(com.db.db)
# ------------------------------------------------------------------------------
# Public functions
# ------------------------------------------------------------------------------
func toHardFork*(com: CommonRef, forkDeterminer: ForkDeterminationInfo): HardFork =
toHardFork(com.forkTransitionTable, forkDeterminer)
proc hardForkTransition(com: CommonRef, forkDeterminer: ForkDeterminationInfo)
{.gcsafe, raises: [Defect, CatchableError].} =
## When consensus type already transitioned to POS,
## the storage can choose not to store TD anymore,
## at that time, TD is no longer needed to find a fork
## TD only needed during transition from POW/POA to POS.
## Same thing happen before London block, TD can be ignored.
let fork = com.toHardFork(forkDeterminer)
com.currentFork = fork
com.consensusTransition(fork)
proc hardForkTransition*(com: CommonRef,
number: BlockNumber,
td: Option[DifficultyInt],
time: Option[EthTime])
{.gcsafe, raises: [Defect, CatchableError].} =
com.hardForkTransition(ForkDeterminationInfo(blockNumber: number, time: time, td: td))
proc hardForkTransition*(com: CommonRef,
parentHash: Hash256,
number: BlockNumber,
time: Option[EthTime])
{.gcsafe, raises: [Defect, CatchableError].} =
com.hardForkTransition(number, getTdIfNecessary(com, parentHash), time)
proc hardForkTransition*(com: CommonRef, header: BlockHeader)
{.gcsafe, raises: [Defect, CatchableError].} =
com.hardForkTransition(header.parentHash, header.blockNumber, some(header.timestamp))
func toEVMFork*(com: CommonRef, forkDeterminer: ForkDeterminationInfo): EVMFork =
## similar to toFork, but produce EVMFork
let fork = com.toHardFork(forkDeterminer)
ToEVMFork[fork]
func toEVMFork*(com: CommonRef): EVMFork =
ToEVMFork[com.currentFork]
func isLondon*(com: CommonRef, number: BlockNumber): bool =
# TODO: Fixme, use only London comparator
com.toHardFork(number.blockNumberToForkDeterminationInfo) >= London
func forkGTE*(com: CommonRef, fork: HardFork): bool =
com.currentFork >= fork
# TODO: move this consensus code to where it belongs
proc minerAddress*(com: CommonRef; header: BlockHeader): EthAddress
{.gcsafe, raises: [CatchableError].} =
if com.consensusType != ConsensusType.POA:
# POW and POS return header.coinbase
return header.coinbase
# POA return ecRecover
let account = header.ecRecover
if account.isErr:
let msg = "Could not recover account address: " & $account.error
raise newException(ValidationError, msg)
account.value
func forkId*(com: CommonRef, forkDeterminer: ForkDeterminationInfo): ForkID {.gcsafe.} =
## EIP 2364/2124
let fork = com.toHardFork(forkDeterminer)
com.forkIds[fork]
func isEIP155*(com: CommonRef, number: BlockNumber): bool =
com.config.eip155Block.isSome and number >= com.config.eip155Block.get
proc isBlockAfterTtd*(com: CommonRef, header: BlockHeader): bool
{.gcsafe, raises: [CatchableError].} =
if com.config.terminalTotalDifficulty.isNone:
return false
let
ttd = com.config.terminalTotalDifficulty.get()
ptd = com.db.getScore(header.parentHash)
td = ptd + header.difficulty
ptd >= ttd and td >= ttd
proc consensus*(com: CommonRef, header: BlockHeader): ConsensusType
{.gcsafe, raises: [CatchableError].} =
if com.isBlockAfterTtd(header):
return ConsensusType.POS
return com.config.consensusType
proc initializeEmptyDb*(com: CommonRef)
{.gcsafe, raises: [CatchableError].} =
let trieDB = com.db.db
if canonicalHeadHashKey().toOpenArray notin trieDB:
trace "Writing genesis to DB"
doAssert(com.genesisHeader.blockNumber.isZero,
"can't commit genesis block with number > 0")
discard com.db.persistHeaderToDb(com.genesisHeader,
com.consensusType == ConsensusType.POS)
doAssert(canonicalHeadHashKey().toOpenArray in trieDB)
proc syncReqNewHead*(com: CommonRef; header: BlockHeader)
{.gcsafe, raises: [CatchableError].} =
## Used by RPC to update the beacon head for snap sync
if not com.syncReqNewHead.isNil:
com.syncReqNewHead(header)
# ------------------------------------------------------------------------------
# Getters
# ------------------------------------------------------------------------------
proc poa*(com: CommonRef): Clique =
## Getter
com.poa
proc pow*(com: CommonRef): PowRef =
## Getter
com.pow
proc pos*(com: CommonRef): CasperRef =
## Getter
com.pos
func db*(com: CommonRef): ChainDBRef =
com.db
func consensus*(com: CommonRef): ConsensusType =
com.consensusType
func eip150Block*(com: CommonRef): Option[BlockNumber] =
com.config.eip150Block
func eip150Hash*(com: CommonRef): Hash256 =
com.config.eip150Hash
func daoForkBlock*(com: CommonRef): Option[BlockNumber] =
com.config.daoForkBlock
func daoForkSupport*(com: CommonRef): bool =
com.config.daoForkSupport
func ttd*(com: CommonRef): Option[DifficultyInt] =
com.config.terminalTotalDifficulty
# if you messing with clique period and
# and epoch, it likely will fail clique verification
# at epoch * blocknumber
func cliquePeriod*(com: CommonRef): int =
if com.config.clique.period.isSome:
return com.config.clique.period.get()
func cliqueEpoch*(com: CommonRef): int =
if com.config.clique.epoch.isSome:
return com.config.clique.epoch.get()
func pruneTrie*(com: CommonRef): bool =
com.pruneTrie
# always remember ChainId and NetworkId
# are two distinct things that often got mixed
# because some client do not make distinction
# between them.
# And popular networks such as MainNet
# Goerli, Rinkeby add more confusion to this
# by not make distinction too in their value.
func chainId*(com: CommonRef): ChainId =
com.config.chainId
func networkId*(com: CommonRef): NetworkId =
com.networkId
func blockReward*(com: CommonRef): UInt256 =
BlockRewards[com.currentFork]
func genesisHash*(com: CommonRef): Hash256 =
## Getter
com.genesisHash
func genesisHeader*(com: CommonRef): BlockHeader =
## Getter
com.genesisHeader
func syncStart*(com: CommonRef): BlockNumber =
com.syncProgress.start
func syncCurrent*(com: CommonRef): BlockNumber =
com.syncProgress.current
func syncHighest*(com: CommonRef): BlockNumber =
com.syncProgress.highest
# ------------------------------------------------------------------------------
# Setters
# ------------------------------------------------------------------------------
proc `syncStart=`*(com: CommonRef, number: BlockNumber) =
com.syncProgress.start = number
proc `syncCurrent=`*(com: CommonRef, number: BlockNumber) =
com.syncProgress.current = number
proc `syncHighest=`*(com: CommonRef, number: BlockNumber) =
com.syncProgress.highest = number
proc setTTD*(com: CommonRef, ttd: Option[DifficultyInt]) =
## useful for testing
com.config.terminalTotalDifficulty = ttd
# rebuild the MergeFork piece of the forkTransitionTable
com.forkTransitionTable.mergeForkTransitionThreshold = com.config.mergeForkTransitionThreshold
proc setFork*(com: CommonRef, fork: HardFork): Hardfork =
## useful for testing
result = com.currentFork
com.currentFork = fork
com.consensusTransition(fork)
proc `syncReqNewHead=`*(com: CommonRef; cb: SyncReqNewHeadCB) =
com.syncReqNewHead = cb
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------
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