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nimbus-eth1/nimbus/common/chain_config.nim

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# Nimbus
# Copyright (c) 2021-2024 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/[tables, strutils, options, times, macros],
eth/[common, rlp, p2p], stint, stew/[byteutils],
json_serialization, chronicles,
json_serialization/std/options as jsoptions,
json_serialization/lexer,
"."/[genesis_alloc, hardforks]
export
hardforks
type
Genesis* = ref object
nonce* : BlockNonce
timestamp* : EthTime
extraData* : seq[byte]
gasLimit* : GasInt
difficulty* : DifficultyInt
mixHash* : Hash256
coinbase* : EthAddress
alloc* : GenesisAlloc
number* : BlockNumber
gasUser* : GasInt
parentHash* : Hash256
baseFeePerGas*: Option[UInt256] # EIP-1559
blobGasUsed* : Option[uint64] # EIP-4844
excessBlobGas*: Option[uint64] # EIP-4844
parentBeaconBlockRoot*: Option[Hash256] # EIP-4788
GenesisAlloc* = Table[EthAddress, GenesisAccount]
GenesisStorage* = Table[UInt256, UInt256]
GenesisAccount* = object
code* : seq[byte]
storage*: GenesisStorage
balance*: UInt256
nonce* : AccountNonce
NetworkParams* = object
config* : ChainConfig
genesis*: Genesis
const
CustomNet* = 0.NetworkId
# these are public network id
MainNet* = 1.NetworkId
SepoliaNet* = 11155111.NetworkId
HoleskyNet* = 17000.NetworkId
createJsonFlavor JGenesis,
automaticObjectSerialization = false,
requireAllFields = false,
omitOptionalFields = true,
allowUnknownFields = true,
skipNullFields = true
template derefType(T: type): untyped =
typeof(T()[])
NetworkParams.useDefaultReaderIn JGenesis
GenesisAccount.useDefaultReaderIn JGenesis
derefType(Genesis).useDefaultReaderIn JGenesis
derefType(ChainConfig).useDefaultReaderIn JGenesis
# ------------------------------------------------------------------------------
# Private helper functions
# ------------------------------------------------------------------------------
# used by chronicles json writer
proc writeValue(writer: var JsonWriter, value: Option[EthTime])
{.gcsafe, raises: [IOError].} =
mixin writeValue
if value.isSome:
writer.writeValue value.get.uint64
else:
writer.writeValue JsonString("null")
type
Slots = object
key: UInt256
val: UInt256
Misc = object
nonce: uint64
code : seq[byte]
storage: seq[Slots]
AddressBalance = object
address: EthAddress
account: GenesisAccount
proc read*(rlp: var Rlp, T: type AddressBalance): T {.gcsafe, raises: [RlpError].}=
let listLen = rlp.listLen
rlp.tryEnterList()
let val = rlp.read(UInt256).toBytesBE()
result.address[0..^1] = val.toOpenArray(12, val.high)
result.account.balance = rlp.read(UInt256)
if listLen == 3:
var misc = rlp.read(Misc)
result.account.nonce = misc.nonce
result.account.code = system.move(misc.code)
for x in misc.storage:
result.account.storage[x.key] = x.val
proc append*(w: var RlpWriter, ab: AddressBalance) =
var listLen = 2
if ab.account.storage.len > 0 or
ab.account.nonce != 0.AccountNonce or
ab.account.code.len > 0:
inc listLen
w.startList(listLen)
var tmp: array[32, byte]
tmp[12..^1] = ab.address[0..^1]
var val = UInt256.fromBytesBE(tmp)
w.append(val)
w.append(ab.account.balance)
if listLen == 3:
var misc: Misc
misc.nonce = ab.account.nonce
misc.code = ab.account.code
for k, v in ab.account.storage:
misc.storage.add Slots(key:k, val: v)
w.append(misc)
proc append*(w: var RlpWriter, ga: GenesisAlloc) =
var list: seq[AddressBalance]
for k, v in ga:
list.add AddressBalance(
address: k, account: v
)
w.append(list)
func decodePrealloc*(data: seq[byte]): GenesisAlloc
{.gcsafe, raises: [RlpError].} =
for tup in rlp.decode(data, seq[AddressBalance]):
result[tup.address] = tup.account
# borrowed from `lexer.hexCharValue()` :)
func fromHex(c: char): int =
case c
of '0'..'9': ord(c) - ord('0')
of 'a'..'f': ord(c) - ord('a') + 10
of 'A'..'F': ord(c) - ord('A') + 10
else: -1
template wrapError(body: untyped) =
try:
body
except ValueError as ex:
raiseUnexpectedValue(reader, ex.msg)
proc readValue(reader: var JsonReader[JGenesis], value: var UInt256)
{.gcsafe, raises: [SerializationError, IOError].} =
## Mixin for `JGenesis.loadFile()`. Note that this driver applies the same
## to `BlockNumber` fields as well as generic `UInt265` fields like the
## account `balance`.
var (accu, ok) = (0.u256, true)
let tokKind = reader.tokKind
if tokKind == JsonValueKind.Number:
try:
reader.customIntValueIt:
accu = accu * 10 + it.u256
except CatchableError:
ok = false
elif tokKind == JsonValueKind.String:
try:
var (sLen, base) = (0, 10)
reader.customStringValueIt:
if ok:
var num = it.fromHex
if base <= num:
ok = false # cannot be larger than base
elif sLen < 2:
if 0 <= num:
accu = accu * base.u256 + num.u256
elif sLen == 1 and it in {'x', 'X'}:
base = 16 # handle "0x" prefix
else:
ok = false
sLen.inc
elif num < 0:
ok = false # not a hex digit
elif base == 10:
accu = accu * 10 + num.u256
else:
accu = accu * 16 + num.u256
except CatchableError:
reader.raiseUnexpectedValue("numeric string parse error")
else:
reader.raiseUnexpectedValue("expect int or hex/int string")
if not ok:
reader.raiseUnexpectedValue("Uint256 parse error")
value = accu
proc readValue(reader: var JsonReader[JGenesis], value: var ChainId)
{.gcsafe, raises: [SerializationError, IOError].} =
value = reader.readValue(int).ChainId
proc readValue(reader: var JsonReader[JGenesis], value: var Hash256)
{.gcsafe, raises: [SerializationError, IOError].} =
value = Hash256.fromHex(reader.readValue(string))
proc readValue(reader: var JsonReader[JGenesis], value: var BlockNonce)
{.gcsafe, raises: [SerializationError, IOError].} =
wrapError:
value = fromHex[uint64](reader.readValue(string)).toBlockNonce
# genesis timestamp is in hex/dec
proc readValue(reader: var JsonReader[JGenesis], value: var EthTime)
{.gcsafe, raises: [SerializationError, IOError].} =
wrapError:
let data = reader.readValue(string)
if data.len > 2 and data[1] == 'x':
value = fromHex[int64](data).EthTime
else:
value = parseInt(data).EthTime
# but shanghaiTime and cancunTime in config is in int literal
proc readValue(reader: var JsonReader[JGenesis], value: var Option[EthTime])
{.gcsafe, raises: [IOError, JsonReaderError].} =
if reader.tokKind == JsonValueKind.Null:
reset value
reader.parseNull()
else:
# both readValue(GasInt/AccountNonce) will be called if
# we use readValue(int64/uint64)
let val = EthTime reader.parseInt(uint64)
value = some val
proc readValue(reader: var JsonReader[JGenesis], value: var seq[byte])
{.gcsafe, raises: [SerializationError, IOError].} =
wrapError:
value = hexToSeqByte(reader.readValue(string))
proc readValue(reader: var JsonReader[JGenesis], value: var GasInt)
{.gcsafe, raises: [SerializationError, IOError].} =
wrapError:
value = fromHex[GasInt](reader.readValue(string))
proc readValue(reader: var JsonReader[JGenesis], value: var EthAddress)
{.gcsafe, raises: [SerializationError, IOError].} =
wrapError:
value = parseAddress(reader.readValue(string))
proc readValue(reader: var JsonReader[JGenesis], value: var AccountNonce)
{.gcsafe, raises: [SerializationError, IOError].} =
wrapError:
value = fromHex[uint64](reader.readValue(string))
proc readValue(reader: var JsonReader[JGenesis], value: var GenesisStorage)
{.gcsafe, raises: [SerializationError, IOError].} =
wrapError:
for key in reader.readObjectFields:
value[UInt256.fromHex(key)] = reader.readValue(UInt256)
proc readValue(reader: var JsonReader[JGenesis], value: var GenesisAlloc)
{.gcsafe, raises: [SerializationError, IOError].} =
wrapError:
for key in reader.readObjectFields:
value[parseAddress(key)] = reader.readValue(GenesisAccount)
macro fillArrayOfBlockNumberBasedForkOptionals(conf, tmp: typed): untyped =
result = newStmtList()
for i, x in forkBlockField:
let fieldIdent = newIdentNode(x)
result.add quote do:
`tmp`[`i`] = BlockNumberBasedForkOptional(
number : `conf`.`fieldIdent`,
name : `x`)
macro fillArrayOfTimeBasedForkOptionals(conf, tmp: typed): untyped =
result = newStmtList()
for i, x in forkTimeField:
let fieldIdent = newIdentNode(x)
result.add quote do:
`tmp`[`i`] = TimeBasedForkOptional(
time : `conf`.`fieldIdent`,
name : `x`)
# ------------------------------------------------------------------------------
# Public functions
# ------------------------------------------------------------------------------
func toHardFork*(map: ForkTransitionTable, forkDeterminer: ForkDeterminationInfo): HardFork =
for fork in countdown(HardFork.high, HardFork.low):
if isGTETransitionThreshold(map, forkDeterminer, fork):
return fork
# should always have a match
doAssert(false, "unreachable code")
proc validateChainConfig*(conf: ChainConfig): bool =
result = true
if conf.mergeNetsplitBlock.isSome:
# geth compatibility
conf.mergeForkBlock = conf.mergeNetsplitBlock
# FIXME: factor this to remove the duplication between the
# block-based ones and the time-based ones.
var blockNumberBasedForkOptionals: array[forkBlockField.len, BlockNumberBasedForkOptional]
fillArrayOfBlockNumberBasedForkOptionals(conf, blockNumberBasedForkOptionals)
var timeBasedForkOptionals: array[forkTimeField.len, TimeBasedForkOptional]
fillArrayOfTimeBasedForkOptionals(conf, timeBasedForkOptionals)
var lastBlockNumberBasedFork = blockNumberBasedForkOptionals[0]
for i in 1..<blockNumberBasedForkOptionals.len:
let cur = blockNumberBasedForkOptionals[i]
if lastBlockNumberBasedFork.number.isSome and cur.number.isSome:
if lastBlockNumberBasedFork.number.get > cur.number.get:
error "Unsupported fork ordering",
lastFork=lastBlockNumberBasedFork.name,
lastNumber=lastBlockNumberBasedFork.number,
curFork=cur.name,
curNumber=cur.number
return false
# If it was optional and not set, then ignore it
if cur.number.isSome:
lastBlockNumberBasedFork = cur
# TODO: check to make sure the timestamps are all past the
# block numbers?
var lastTimeBasedFork = timeBasedForkOptionals[0]
for i in 1..<timeBasedForkOptionals.len:
let cur = timeBasedForkOptionals[i]
if lastTimeBasedFork.time.isSome and cur.time.isSome:
if lastTimeBasedFork.time.get > cur.time.get:
error "Unsupported fork ordering",
lastFork=lastTimeBasedFork.name,
lastTime=lastTimeBasedFork.time,
curFork=cur.name,
curTime=cur.time
return false
# If it was optional and not set, then ignore it
if cur.time.isSome:
lastTimeBasedFork = cur
proc parseGenesis*(data: string): Genesis
{.gcsafe.} =
try:
result = JGenesis.decode(data, Genesis, allowUnknownFields = true)
except JsonReaderError as e:
error "Invalid genesis config file format", msg=e.formatMsg("")
return nil
except CatchableError as e:
error "Error loading genesis data",
exception = e.name, msg = e.msg
return nil
proc parseGenesisFile*(fileName: string): Genesis
{.gcsafe.} =
try:
result = JGenesis.loadFile(fileName, Genesis, allowUnknownFields = true)
except IOError as e:
error "Genesis I/O error", fileName, msg=e.msg
return nil
except JsonReaderError as e:
error "Invalid genesis config file format", msg=e.formatMsg("")
return nil
except CatchableError as e:
error "Error loading genesis file",
fileName, exception = e.name, msg = e.msg
return nil
proc validateNetworkParams(params: var NetworkParams, input: string, inputIsFile: bool): bool =
if params.genesis.isNil:
# lets try with geth's format
let genesis = if inputIsFile: parseGenesisFile(input)
else: parseGenesis(input)
if genesis.isNil:
return false
params.genesis = genesis
if params.config.isNil:
warn "Loaded custom network contains no 'config' data"
params.config = ChainConfig()
validateChainConfig(params.config)
proc loadNetworkParams*(fileName: string, params: var NetworkParams):
bool =
try:
params = JGenesis.loadFile(fileName, NetworkParams, allowUnknownFields = true)
except IOError as e:
error "Network params I/O error", fileName, msg=e.msg
return false
except JsonReaderError as e:
error "Invalid network params file format", fileName, msg=e.formatMsg("")
return false
except CatchableError as e:
error "Error loading network params file",
fileName, exception = e.name, msg = e.msg
return false
validateNetworkParams(params, fileName, true)
proc decodeNetworkParams*(jsonString: string, params: var NetworkParams): bool =
try:
params = JGenesis.decode(jsonString, NetworkParams, allowUnknownFields = true)
except JsonReaderError as e:
error "Invalid network params format", msg=e.formatMsg("")
return false
except CatchableError:
var msg = getCurrentExceptionMsg()
error "Error decoding network params", msg
return false
validateNetworkParams(params, jsonString, false)
proc parseGenesisAlloc*(data: string, ga: var GenesisAlloc): bool
{.gcsafe, raises: [CatchableError].} =
try:
ga = JGenesis.decode(data, GenesisAlloc, allowUnknownFields = true)
except JsonReaderError as e:
error "Invalid genesis config file format", msg=e.formatMsg("")
return false
return true
func chainConfigForNetwork*(id: NetworkId): ChainConfig =
# For some public networks, NetworkId and ChainId value are identical
# but that is not always the case
result = case id
of MainNet:
const mainNetTTD = parse("58750000000000000000000",UInt256)
ChainConfig(
consensusType: ConsensusType.POW,
chainId: MainNet.ChainId,
# Genesis (Frontier): # 2015-07-30 15:26:13 UTC
# Frontier Thawing: 200_000.toBlockNumber, # 2015-09-07 21:33:09 UTC
homesteadBlock: some(1_150_000.toBlockNumber), # 2016-03-14 18:49:53 UTC
daoForkBlock: some(1_920_000.toBlockNumber), # 2016-07-20 13:20:40 UTC
daoForkSupport: true,
eip150Block: some(2_463_000.toBlockNumber), # 2016-10-18 13:19:31 UTC
eip150Hash: toDigest("2086799aeebeae135c246c65021c82b4e15a2c451340993aacfd2751886514f0"),
eip155Block: some(2_675_000.toBlockNumber), # Same as EIP-158
eip158Block: some(2_675_000.toBlockNumber), # 2016-11-22 16:15:44 UTC
byzantiumBlock: some(4_370_000.toBlockNumber), # 2017-10-16 05:22:11 UTC
constantinopleBlock: some(7_280_000.toBlockNumber), # Skipped on Mainnet
petersburgBlock: some(7_280_000.toBlockNumber), # 2019-02-28 19:52:04 UTC
istanbulBlock: some(9_069_000.toBlockNumber), # 2019-12-08 00:25:09 UTC
muirGlacierBlock: some(9_200_000.toBlockNumber), # 2020-01-02 08:30:49 UTC
berlinBlock: some(12_244_000.toBlockNumber), # 2021-04-15 10:07:03 UTC
londonBlock: some(12_965_000.toBlockNumber), # 2021-08-05 12:33:42 UTC
arrowGlacierBlock: some(13_773_000.toBlockNumber), # 2021-12-09 19:55:23 UTC
grayGlacierBlock: some(15_050_000.toBlockNumber), # 2022-06-30 10:54:04 UTC
terminalTotalDifficulty: some(mainNetTTD),
shanghaiTime: some(1_681_338_455.EthTime)
)
of SepoliaNet:
const sepoliaTTD = parse("17000000000000000",UInt256)
ChainConfig(
consensusType: ConsensusType.POW,
chainId: SepoliaNet.ChainId,
homesteadBlock: some(0.toBlockNumber),
daoForkSupport: false,
eip150Block: some(0.toBlockNumber),
eip150Hash: toDigest("0000000000000000000000000000000000000000000000000000000000000000"),
eip155Block: some(0.toBlockNumber),
eip158Block: some(0.toBlockNumber),
byzantiumBlock: some(0.toBlockNumber),
constantinopleBlock: some(0.toBlockNumber),
petersburgBlock: some(0.toBlockNumber),
istanbulBlock: some(0.toBlockNumber),
muirGlacierBlock: some(0.toBlockNumber),
berlinBlock: some(0.toBlockNumber),
londonBlock: some(0.toBlockNumber),
mergeForkBlock: some(1735371.toBlockNumber),
terminalTotalDifficulty: some(sepoliaTTD),
shanghaiTime: some(1_677_557_088.EthTime),
cancunTime: some(1_706_655_072.EthTime), # 2024-01-30 22:51:12
)
of HoleskyNet:
ChainConfig(
consensusType: ConsensusType.POS,
chainId: HoleskyNet.ChainId,
homesteadBlock: some(0.toBlockNumber),
eip150Block: some(0.toBlockNumber),
eip155Block: some(0.toBlockNumber),
eip158Block: some(0.toBlockNumber),
byzantiumBlock: some(0.toBlockNumber),
constantinopleBlock: some(0.toBlockNumber),
petersburgBlock: some(0.toBlockNumber),
istanbulBlock: some(0.toBlockNumber),
berlinBlock: some(0.toBlockNumber),
londonBlock: some(0.toBlockNumber),
mergeForkBlock: some(0.toBlockNumber),
terminalTotalDifficulty: some(0.u256),
terminalTotalDifficultyPassed: some(true),
shanghaiTime: some(1_696_000_704.EthTime),
cancunTime: some(1_707_305_664.EthTime), # 2024-02-07 11:34:24
)
else:
ChainConfig()
func genesisBlockForNetwork*(id: NetworkId): Genesis
{.gcsafe, raises: [ValueError, RlpError].} =
result = case id
of MainNet:
Genesis(
nonce: 66.toBlockNonce,
extraData: hexToSeqByte("0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa"),
gasLimit: 5000,
difficulty: 17179869184.u256,
alloc: decodePrealloc(mainnetAllocData)
)
of SepoliaNet:
Genesis(
nonce: 0.toBlockNonce,
timestamp: EthTime(0x6159af19),
extraData: hexToSeqByte("0x5365706f6c69612c20417468656e732c204174746963612c2047726565636521"),
gasLimit: 0x1c9c380,
difficulty: 0x20000.u256,
alloc: decodePrealloc(sepoliaAllocData)
)
of HoleskyNet:
Genesis(
difficulty: 0x01.u256,
gasLimit: 0x17D7840,
nonce: 0x1234.toBlockNonce,
timestamp: EthTime(1_695_902_100),
alloc: decodePrealloc(holeskyAllocData)
)
else:
Genesis()
func networkParams*(id: NetworkId): NetworkParams
{.gcsafe, raises: [ValueError, RlpError].} =
result.genesis = genesisBlockForNetwork(id)
result.config = chainConfigForNetwork(id)
func `==`*(a, b: ChainId): bool =
a.uint64 == b.uint64
func `==`*(a, b: Genesis): bool =
if a.isNil and b.isNil: return true
if a.isNil and not b.isNil: return false
if not a.isNil and b.isNil: return false
a[] == b[]
func `==`*(a, b: ChainConfig): bool =
if a.isNil and b.isNil: return true
if a.isNil and not b.isNil: return false
if not a.isNil and b.isNil: return false
a[] == b[]
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