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# Nimbus
# Copyright (c) 2022-2023 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,
../core/[pow, clique, casper],
../db/[core_db, ledger, storage_types],
../utils/[utils, ec_recover],
".."/[constants, errors],
"."/[chain_config, evmforks, genesis, hardforks]
export
chain_config,
core_db,
constants,
errors,
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: CoreDbRef
# 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
forkIdCalculator: ForkIdCalculator
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
## Call back function for the sync processor. This function stages
## the arguent header to a private aerea for subsequent processing.
syncReqRelaxV2: bool
## Allow processing of certain RPC/V2 messages type while syncing (i.e.
## `syncReqNewHead` is set.) although `shanghaiTime` is unavailable
## or has not reached, yet.
startOfHistory: Hash256
## This setting is needed for resuming blockwise syncying after
## installing a snapshot pivot. The default value for this field is
## `GENESIS_PARENT_HASH` to start at the very beginning.
pow: PowRef
## Wrapper around `hashimotoLight()` and lookup cache
poa: Clique
## For non-PoA networks this descriptor is ignored.
pos: CasperRef
## Proof Of Stake descriptor
ldgType: LedgerType
## Optional suggestion for the ledger cache to be used as state DB
const
CommonLedgerTypeDefault* = LegacyAccountsCache
## Default ledger type to use, see `ldgType` above
# ------------------------------------------------------------------------------
# Forward declarations
# ------------------------------------------------------------------------------
proc hardForkTransition*(
com: CommonRef, forkDeterminer: ForkDeterminationInfo)
{.gcsafe, raises: [].}
func cliquePeriod*(com: CommonRef): EthTime
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, genesis: BlockHeader) =
com.genesisHash = genesis.blockHash
let genesisCRC = crc32(0, com.genesisHash.data)
com.forkIdCalculator = initForkIdCalculator(
com.forkTransitionTable,
genesisCRC,
genesis.timestamp.uint64)
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 : CoreDbRef,
pruneTrie: bool,
networkId: NetworkId,
config : ChainConfig,
genesis : Genesis,
ldgType : LedgerType,
) {.gcsafe, raises: [CatchableError].} =
config.daoCheck()
com.db = db
com.pruneTrie = pruneTrie
com.config = config
com.forkTransitionTable = config.toForkTransitionTable()
com.networkId = networkId
com.syncProgress= SyncProgress()
com.ldgType = ldgType
# 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
# 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
const TimeZero = EthTime(0)
# com.forkIdCalculator and com.genesisHash are set
# by setForkId
if genesis.isNil.not:
com.hardForkTransition(ForkDeterminationInfo(
blockNumber: 0.toBlockNumber,
td: some(0.u256),
time: some(genesis.timestamp)
))
com.genesisHeader = toGenesisHeader(genesis,
com.currentFork, com.db, com.ldgType)
com.setForkId(com.genesisHeader)
com.pos.timestamp = genesis.timestamp
else:
com.hardForkTransition(ForkDeterminationInfo(
blockNumber: 0.toBlockNumber,
td: some(0.u256),
time: some(TimeZero)
))
# By default, history begins at genesis.
com.startOfHistory = GENESIS_PARENT_HASH
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.ttdPassed.isNone and 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: CoreDbRef;
pruneTrie: bool = true;
networkId: NetworkId = MainNet;
params = networkParams(MainNet);
ldgType = CommonLedgerTypeDefault;
): 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,
ldgType)
proc new*(
_: type CommonRef;
db: CoreDbRef;
config: ChainConfig;
pruneTrie: bool = true;
networkId: NetworkId = MainNet;
ldgType = CommonLedgerTypeDefault;
): 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,
ldgType)
proc clone*(com: CommonRef, db: CoreDbRef): CommonRef =
## clone but replace the db
## used in EVM tracer whose db is CaptureDB
CommonRef(
db : db,
pruneTrie : com.pruneTrie,
config : com.config,
forkTransitionTable: com.forkTransitionTable,
forkIdCalculator: com.forkIdCalculator,
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,
ldgType : com.ldgType
)
proc clone*(com: CommonRef): CommonRef =
com.clone(com.db)
# ------------------------------------------------------------------------------
# Public functions
# ------------------------------------------------------------------------------
func toHardFork*(
com: CommonRef, forkDeterminer: ForkDeterminationInfo): HardFork =
toHardFork(com.forkTransitionTable, forkDeterminer)
proc hardForkTransition(
com: CommonRef, forkDeterminer: ForkDeterminationInfo)
{.gcsafe, raises: [].} =
## 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: [].} =
com.hardForkTransition(ForkDeterminationInfo(
blockNumber: number, time: time, td: td))
proc hardForkTransition*(
com: CommonRef,
parentHash: Hash256,
number: BlockNumber,
time: Option[EthTime])
{.gcsafe, raises: [].} =
com.hardForkTransition(number, getTdIfNecessary(com, parentHash), time)
proc hardForkTransition*(
com: CommonRef, header: BlockHeader)
{.gcsafe, raises: [].} =
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.forkDeterminationInfo) >= London
func isLondon*(com: CommonRef, number: BlockNumber, timestamp: EthTime): bool =
# TODO: Fixme, use only London comparator
com.toHardFork(forkDeterminationInfo(number, timestamp)) >= 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, head, time: uint64): ForkID {.gcsafe.} =
## EIP 2364/2124
com.forkIdCalculator.newID(head, time)
func forkId*(com: CommonRef, head: BlockNumber, time: EthTime): ForkID {.gcsafe.} =
## EIP 2364/2124
com.forkIdCalculator.newID(head.truncate(uint64), time.uint64)
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
func isShanghaiOrLater*(com: CommonRef, t: EthTime): bool =
com.config.shanghaiTime.isSome and t >= com.config.shanghaiTime.get
func isCancunOrLater*(com: CommonRef, t: EthTime): bool =
com.config.cancunTime.isSome and t >= com.config.cancunTime.get
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 kvt = com.db.kvt()
if canonicalHeadHashKey().toOpenArray notin kvt:
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 kvt)
proc syncReqNewHead*(com: CommonRef; header: BlockHeader)
{.gcsafe, raises: [].} =
## Used by RPC to update the beacon head for snap sync
if not com.syncReqNewHead.isNil:
com.syncReqNewHead(header)
# ------------------------------------------------------------------------------
# Getters
# ------------------------------------------------------------------------------
func startOfHistory*(com: CommonRef): Hash256 =
## Getter
com.startOfHistory
func poa*(com: CommonRef): Clique =
## Getter
com.poa
func pow*(com: CommonRef): PowRef =
## Getter
com.pow
func pos*(com: CommonRef): CasperRef =
## Getter
com.pos
func db*(com: CommonRef): CoreDbRef =
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
func ttdPassed*(com: CommonRef): bool =
com.config.terminalTotalDifficultyPassed.get(false)
# if you messing with clique period and
# and epoch, it likely will fail clique verification
# at epoch * blocknumber
func cliquePeriod*(com: CommonRef): EthTime =
if com.config.clique.period.isSome:
return EthTime 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 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
func syncReqRelaxV2*(com: CommonRef): bool =
com.syncReqRelaxV2
func ledgerType*(com: CommonRef): LedgerType =
com.ldgType
# ------------------------------------------------------------------------------
# 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 `startOfHistory=`*(com: CommonRef, val: Hash256) =
## Setter
com.startOfHistory = val
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) =
## Activate or reset a call back handler for syncing. When resetting (by
## passing `cb` as `nil`), the `syncReqRelaxV2` value is also reset.
com.syncReqNewHead = cb
if cb.isNil:
com.syncReqRelaxV2 = false
proc `syncReqRelaxV2=`*(com: CommonRef; val: bool) =
## Allow processing of certain RPC/V2 messages type while syncing (i.e.
## `syncReqNewHead` is set.) although `shanghaiTime` is unavailable
## or has not reached, yet.
##
## This setter is effective only while `syncReqNewHead` is activated.
if not com.syncReqNewHead.isNil:
com.syncReqRelaxV2 = val
# ------------------------------------------------------------------------------
# End
# ------------------------------------------------------------------------------
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