# beacon_chain # Copyright (c) 2018-2022 Status Research & Development GmbH # Licensed and distributed under either of # * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT). # * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0). # at your option. This file may not be copied, modified, or distributed except according to those terms. when (NimMajor, NimMinor) < (1, 4): {.push raises: [Defect].} else: {.push raises: [].} import std/[macros, strutils, parseutils, tables], stew/[byteutils], stint, web3/[ethtypes] const # https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/specs/phase0/beacon-chain.md#withdrawal-prefixes BLS_WITHDRAWAL_PREFIX*: byte = 0 ETH1_ADDRESS_WITHDRAWAL_PREFIX*: byte = 1 # Constants from `validator.md` not covered by config/presets in the spec TARGET_AGGREGATORS_PER_COMMITTEE*: uint64 = 16 RANDOM_SUBNETS_PER_VALIDATOR*: uint64 = 1 EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION*: uint64 = 256 type Slot* = distinct uint64 Epoch* = distinct uint64 SyncCommitteePeriod* = distinct uint64 Version* = distinct array[4, byte] Eth1Address* = ethtypes.Address RuntimeConfig* = object ## https://github.com/ethereum/consensus-specs/tree/v1.1.10/configs PRESET_BASE*: string CONFIG_NAME*: string # Transition TERMINAL_TOTAL_DIFFICULTY*: UInt256 TERMINAL_BLOCK_HASH*: BlockHash # TODO TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH*: Epoch # Genesis MIN_GENESIS_ACTIVE_VALIDATOR_COUNT*: uint64 MIN_GENESIS_TIME*: uint64 GENESIS_FORK_VERSION*: Version GENESIS_DELAY*: uint64 # Forking ALTAIR_FORK_VERSION*: Version ALTAIR_FORK_EPOCH*: Epoch BELLATRIX_FORK_VERSION*: Version BELLATRIX_FORK_EPOCH*: Epoch CAPELLA_FORK_VERSION*: Version CAPELLA_FORK_EPOCH*: Epoch SHARDING_FORK_VERSION*: Version SHARDING_FORK_EPOCH*: Epoch # Time parameters # TODO SECONDS_PER_SLOT*: uint64 SECONDS_PER_ETH1_BLOCK*: uint64 MIN_VALIDATOR_WITHDRAWABILITY_DELAY*: uint64 SHARD_COMMITTEE_PERIOD*: uint64 ETH1_FOLLOW_DISTANCE*: uint64 # Validator cycle INACTIVITY_SCORE_BIAS*: uint64 INACTIVITY_SCORE_RECOVERY_RATE*: uint64 EJECTION_BALANCE*: uint64 MIN_PER_EPOCH_CHURN_LIMIT*: uint64 CHURN_LIMIT_QUOTIENT*: uint64 # Fork choice # TODO PROPOSER_SCORE_BOOST*: uint64 # Deposit contract DEPOSIT_CHAIN_ID*: uint64 DEPOSIT_NETWORK_ID*: uint64 DEPOSIT_CONTRACT_ADDRESS*: Eth1Address PresetFile* = object values*: Table[string, string] missingValues*: seq[string] PresetFileError* = object of CatchableError PresetIncompatibleError* = object of CatchableError const FAR_FUTURE_EPOCH* = (not 0'u64).Epoch # 2^64 - 1 in spec const_preset* {.strdefine.} = "mainnet" # These constants cannot really be overriden in a preset. # If we encounter them, we'll just ignore the preset value. # TODO verify the value against the constant instead ignoredValues* = [ # TODO Once implemented as part of the RuntimeConfig, # this should be removed from here "SECONDS_PER_SLOT", "BLS_WITHDRAWAL_PREFIX", "MAX_COMMITTEES_PER_SLOT", "TARGET_COMMITTEE_SIZE", "MAX_VALIDATORS_PER_COMMITTEE", "SHUFFLE_ROUND_COUNT", "HYSTERESIS_QUOTIENT", "HYSTERESIS_DOWNWARD_MULTIPLIER", "HYSTERESIS_UPWARD_MULTIPLIER", "SAFE_SLOTS_TO_UPDATE_JUSTIFIED", "MIN_DEPOSIT_AMOUNT", "MAX_EFFECTIVE_BALANCE", "EFFECTIVE_BALANCE_INCREMENT", "MIN_ATTESTATION_INCLUSION_DELAY", "SLOTS_PER_EPOCH", "MIN_SEED_LOOKAHEAD", "MAX_SEED_LOOKAHEAD", "EPOCHS_PER_ETH1_VOTING_PERIOD", "SLOTS_PER_HISTORICAL_ROOT", "MIN_EPOCHS_TO_INACTIVITY_PENALTY", "EPOCHS_PER_HISTORICAL_VECTOR", "EPOCHS_PER_SLASHINGS_VECTOR", "HISTORICAL_ROOTS_LIMIT", "VALIDATOR_REGISTRY_LIMIT", "BASE_REWARD_FACTOR", "WHISTLEBLOWER_REWARD_QUOTIENT", "PROPOSER_REWARD_QUOTIENT", "INACTIVITY_PENALTY_QUOTIENT", "MIN_SLASHING_PENALTY_QUOTIENT", "PROPORTIONAL_SLASHING_MULTIPLIER", "MAX_PROPOSER_SLASHINGS", "MAX_ATTESTER_SLASHINGS", "MAX_ATTESTATIONS", "MAX_DEPOSITS", "MAX_VOLUNTARY_EXITS", "TARGET_AGGREGATORS_PER_COMMITTEE", "RANDOM_SUBNETS_PER_VALIDATOR", "EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION", "ATTESTATION_SUBNET_COUNT", "DOMAIN_BEACON_PROPOSER", "DOMAIN_BEACON_ATTESTER", "DOMAIN_RANDAO", "DOMAIN_DEPOSIT", "DOMAIN_VOLUNTARY_EXIT", "DOMAIN_SELECTION_PROOF", "DOMAIN_AGGREGATE_AND_PROOF", "DOMAIN_SYNC_COMMITTEE", "DOMAIN_SYNC_COMMITTEE_SELECTION_PROOF", "DOMAIN_CONTRIBUTION_AND_PROOF", "TRANSITION_TOTAL_DIFFICULTY", # Name that appears in some altair alphas, obsolete, remove when no more testnets "MIN_ANCHOR_POW_BLOCK_DIFFICULTY", # Name that appears in some altair alphas, obsolete, remove when no more testnets "TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH", # Never pervasively implemented, still under discussion "PROPOSER_SCORE_BOOST", # Isn't being used as a preset in the usual way: at any time, there's one correct value ] when const_preset == "mainnet": import ./presets/mainnet export mainnet # TODO Move this to RuntimeConfig const SECONDS_PER_SLOT* {.intdefine.}: uint64 = 12 # https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/configs/mainnet.yaml # TODO Read these from yaml file const defaultRuntimeConfig* = RuntimeConfig( # Mainnet config # Extends the mainnet preset PRESET_BASE: "mainnet", # Free-form short name of the network that this configuration applies to - known # canonical network names include: # * 'mainnet' - there can be only one # * 'prater' - testnet # * 'ropsten' - testnet # * 'sepolia' - testnet # Must match the regex: [a-z0-9\-] CONFIG_NAME: "mainnet", # Transition # --------------------------------------------------------------- # TBD, 2**256-2**10 is a placeholder TERMINAL_TOTAL_DIFFICULTY: u256"115792089237316195423570985008687907853269984665640564039457584007913129638912", # By default, don't use these params TERMINAL_BLOCK_HASH: BlockHash.fromHex( "0x0000000000000000000000000000000000000000000000000000000000000000"), # TODO TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH: Epoch(uint64.high), # Genesis # --------------------------------------------------------------- # `2**14` (= 16,384) MIN_GENESIS_ACTIVE_VALIDATOR_COUNT: 16384, # Dec 1, 2020, 12pm UTC MIN_GENESIS_TIME: 1606824000, # Mainnet initial fork version, recommend altering for testnets GENESIS_FORK_VERSION: Version [byte 0x00, 0x00, 0x00, 0x00], # 604800 seconds (7 days) GENESIS_DELAY: 604800, # Forking # --------------------------------------------------------------- # Some forks are disabled for now: # - These may be re-assigned to another fork-version later # - Temporarily set to max uint64 value: 2**64 - 1 # Altair ALTAIR_FORK_VERSION: Version [byte 0x01, 0x00, 0x00, 0x00], ALTAIR_FORK_EPOCH: Epoch(74240), # Oct 27, 2021, 10:56:23am UTC # Bellatrix BELLATRIX_FORK_VERSION: Version [byte 0x02, 0x00, 0x00, 0x00], BELLATRIX_FORK_EPOCH: Epoch(uint64.high), # Capella CAPELLA_FORK_VERSION: Version [byte 0x03, 0x00, 0x00, 0x00], CAPELLA_FORK_EPOCH: Epoch(uint64.high), # Sharding SHARDING_FORK_VERSION: Version [byte 0x04, 0x00, 0x00, 0x00], SHARDING_FORK_EPOCH: Epoch(uint64.high), # Time parameters # --------------------------------------------------------------- # 12 seconds # TODO SECONDS_PER_SLOT: 12, # 14 (estimate from Eth1 mainnet) SECONDS_PER_ETH1_BLOCK: 14, # 2**8 (= 256) epochs ~27 hours MIN_VALIDATOR_WITHDRAWABILITY_DELAY: 256, # 2**8 (= 256) epochs ~27 hours SHARD_COMMITTEE_PERIOD: 256, # 2**11 (= 2,048) Eth1 blocks ~8 hours ETH1_FOLLOW_DISTANCE: 2048, # Validator cycle # --------------------------------------------------------------- # 2**2 (= 4) INACTIVITY_SCORE_BIAS: 4, # 2**4 (= 16) INACTIVITY_SCORE_RECOVERY_RATE: 16, # 2**4 * 10**9 (= 16,000,000,000) Gwei EJECTION_BALANCE: 16000000000'u64, # 2**2 (= 4) MIN_PER_EPOCH_CHURN_LIMIT: 4, # 2**16 (= 65,536) CHURN_LIMIT_QUOTIENT: 65536, # Deposit contract # --------------------------------------------------------------- # Ethereum PoW Mainnet DEPOSIT_CHAIN_ID: 1, DEPOSIT_NETWORK_ID: 1, DEPOSIT_CONTRACT_ADDRESS: Eth1Address.fromHex("0x00000000219ab540356cBB839Cbe05303d7705Fa") ) elif const_preset == "minimal": import ./presets/minimal export minimal const SECONDS_PER_SLOT* {.intdefine.}: uint64 = 6 # https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/configs/minimal.yaml const defaultRuntimeConfig* = RuntimeConfig( # Minimal config # Extends the minimal preset PRESET_BASE: "minimal", # Free-form short name of the network that this configuration applies to - known # canonical network names include: # * 'mainnet' - there can be only one # * 'prater' - testnet # * 'ropsten' - testnet # * 'sepolia' - testnet # Must match the regex: [a-z0-9\-] CONFIG_NAME: "minimal", # Transition # --------------------------------------------------------------- # TBD, 2**256-2**10 is a placeholder TERMINAL_TOTAL_DIFFICULTY: u256"115792089237316195423570985008687907853269984665640564039457584007913129638912", # By default, don't use these params TERMINAL_BLOCK_HASH: BlockHash.fromHex( "0x0000000000000000000000000000000000000000000000000000000000000000"), # TODO TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH: Epoch(uint64.high), # Genesis # --------------------------------------------------------------- # [customized] MIN_GENESIS_ACTIVE_VALIDATOR_COUNT: 64, # Jan 3, 2020 MIN_GENESIS_TIME: 1578009600, # Highest byte set to 0x01 to avoid collisions with mainnet versioning GENESIS_FORK_VERSION: Version [byte 0x00, 0x00, 0x00, 0x01], # [customized] Faster to spin up testnets, but does not give validator reasonable warning time for genesis GENESIS_DELAY: 300, # Forking # --------------------------------------------------------------- # Values provided for illustrative purposes. # Individual tests/testnets may set different values. # Altair ALTAIR_FORK_VERSION: Version [byte 0x01, 0x00, 0x00, 0x01], ALTAIR_FORK_EPOCH: Epoch(uint64.high), # Bellatrix BELLATRIX_FORK_VERSION: Version [byte 0x02, 0x00, 0x00, 0x01], BELLATRIX_FORK_EPOCH: Epoch(uint64.high), # Capella CAPELLA_FORK_VERSION: Version [byte 0x03, 0x00, 0x00, 0x01], CAPELLA_FORK_EPOCH: Epoch(uint64.high), # Sharding SHARDING_FORK_VERSION: Version [byte 0x04, 0x00, 0x00, 0x01], SHARDING_FORK_EPOCH: Epoch(uint64.high), # Time parameters # --------------------------------------------------------------- # [customized] Faster for testing purposes # TODO SECONDS_PER_SLOT: 6, # 14 (estimate from Eth1 mainnet) SECONDS_PER_ETH1_BLOCK: 14, # 2**8 (= 256) epochs MIN_VALIDATOR_WITHDRAWABILITY_DELAY: 256, # [customized] higher frequency of committee turnover and faster time to acceptable voluntary exit SHARD_COMMITTEE_PERIOD: 64, # [customized] process deposits more quickly, but insecure ETH1_FOLLOW_DISTANCE: 16, # Validator cycle # --------------------------------------------------------------- # 2**2 (= 4) INACTIVITY_SCORE_BIAS: 4, # 2**4 (= 16) INACTIVITY_SCORE_RECOVERY_RATE: 16, # 2**4 * 10**9 (= 16,000,000,000) Gwei EJECTION_BALANCE: 16000000000'u64, # 2**2 (= 4) MIN_PER_EPOCH_CHURN_LIMIT: 4, # [customized] scale queue churn at much lower validator counts for testing CHURN_LIMIT_QUOTIENT: 32, # Deposit contract # --------------------------------------------------------------- # Ethereum Goerli testnet DEPOSIT_CHAIN_ID: 5, DEPOSIT_NETWORK_ID: 5, # Configured on a per testnet basis DEPOSIT_CONTRACT_ADDRESS: Eth1Address.fromHex("0x1234567890123456789012345678901234567890") ) else: {.error: "Only mainnet and minimal presets supported".} # macro createConstantsFromPreset*(path: static string): untyped = # result = newStmtList() # let preset = try: readPresetFile(path) # except CatchableError as err: # error err.msg # TODO: This should be marked as noreturn # return # for name, value in preset.values: # let # typ = getType(name) # value = if typ in ["int64", "uint64", "byte"]: typ & "(" & value & ")" # else: "parse(" & typ & ", \"" & value & "\")" # try: # result.add parseStmt("const $1* {.intdefine.} = $2" % [$name, value]) # except ValueError: # doAssert false, "All values in the presets are printable" # if preset.missingValues.card > 0: # warning "Missing constants in preset: " & $preset.missingValues # createConstantsFromPreset const_preset const SLOTS_PER_SYNC_COMMITTEE_PERIOD* = SLOTS_PER_EPOCH * EPOCHS_PER_SYNC_COMMITTEE_PERIOD func parse(T: type uint64, input: string): T {.raises: [ValueError, Defect].} = var res: BiggestUInt if input.len > 2 and input[0] == '0' and input[1] == 'x': if parseHex(input, res) != input.len: raise newException(ValueError, "The constant value should be a valid hex integer") else: if parseBiggestUInt(input, res) != input.len: raise newException(ValueError, "The constant value should be a valid unsigned integer") uint64(res) template parse(T: type byte, input: string): T = byte parse(uint64, input) func parse(T: type Version, input: string): T {.raises: [ValueError, Defect].} = Version hexToByteArray(input, 4) template parse(T: type Slot, input: string): T = Slot parse(uint64, input) template parse(T: type Epoch, input: string): T = Epoch parse(uint64, input) template parse(T: type string, input: string): T = input.strip(chars = {'"', '\''}) template parse(T: type Eth1Address, input: string): T = Eth1Address.fromHex(input) template parse(T: type BlockHash, input: string): T = BlockHash.fromHex(input) template parse(T: type UInt256, input: string): T = parse(input, UInt256, 10) proc readRuntimeConfig*( path: string): (RuntimeConfig, seq[string]) {. raises: [IOError, PresetFileError, PresetIncompatibleError, Defect].} = var lineNum = 0 cfg = defaultRuntimeConfig unknowns: seq[string] template lineinfo: string = try: "$1($2) " % [path, $lineNum] except ValueError: path template fail(msg) = raise newException(PresetFileError, lineinfo() & msg) var names: seq[string] for name, field in cfg.fieldPairs(): names.add name var values: Table[string, string] for line in splitLines(readFile(path)): inc lineNum if line.len == 0 or line[0] == '#': continue # remove any trailing comments let line = line.split("#")[0] let lineParts = line.split(":") if lineParts.len != 2: fail "Invalid syntax: A preset file should include only assignments in the form 'ConstName: Value'" if lineParts[0] in ignoredValues: continue if lineParts[0] notin names: unknowns.add(lineParts[0]) values[lineParts[0]] = lineParts[1].strip for name, field in cfg.fieldPairs(): if name in values: try: field = parse(typeof(field), values[name]) except ValueError: raise (ref PresetFileError)(msg: "Unable to parse " & name) if cfg.PRESET_BASE != const_preset: raise (ref PresetIncompatibleError)( msg: "Config not compatible with binary, compile with -d:const_preset=" & cfg.PRESET_BASE) (cfg, unknowns) template name*(cfg: RuntimeConfig): string = if cfg.CONFIG_NAME.len() > 0: cfg.CONFIG_NAME else: const_preset # https://github.com/ethereum/consensus-specs/blob/v1.2.0-rc.1/specs/phase0/p2p-interface.md#configuration func MIN_EPOCHS_FOR_BLOCK_REQUESTS*(cfg: RuntimeConfig): uint64 = cfg.MIN_VALIDATOR_WITHDRAWABILITY_DELAY + cfg.CHURN_LIMIT_QUOTIENT div 2 func defaultLightClientDataMaxPeriods*(cfg: RuntimeConfig): uint64 = const epochsPerPeriod = EPOCHS_PER_SYNC_COMMITTEE_PERIOD let maxEpochs = cfg.MIN_EPOCHS_FOR_BLOCK_REQUESTS (maxEpochs + epochsPerPeriod - 1) div epochsPerPeriod