129 lines
3.6 KiB
Nim
129 lines
3.6 KiB
Nim
import
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macros, strutils, tables
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type
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BeaconChainConstants* = enum
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BASE_REWARDS_PER_EPOCH
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BASE_REWARD_FACTOR
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BLS_WITHDRAWAL_PREFIX
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CHURN_LIMIT_QUOTIENT
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DEPOSIT_CONTRACT_TREE_DEPTH
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DOMAIN_BEACON_ATTESTER
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DOMAIN_BEACON_PROPOSER
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DOMAIN_DEPOSIT
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DOMAIN_RANDAO
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DOMAIN_VOLUNTARY_EXIT
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EFFECTIVE_BALANCE_INCREMENT
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EJECTION_BALANCE
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EPOCHS_PER_HISTORICAL_VECTOR
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EPOCHS_PER_SLASHINGS_VECTOR
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ETH1_FOLLOW_DISTANCE
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GENESIS_EPOCH
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GENESIS_SLOT
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HISTORICAL_ROOTS_LIMIT
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INACTIVITY_PENALTY_QUOTIENT
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JUSTIFICATION_BITS_LENGTH
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MAX_ATTESTATIONS
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MAX_ATTESTER_SLASHINGS
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MAX_COMMITTEES_PER_SLOT
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MAX_DEPOSITS
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MAX_EFFECTIVE_BALANCE
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MAX_PROPOSER_SLASHINGS
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MAX_SEED_LOOKAHEAD
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MAX_VALIDATORS_PER_COMMITTEE
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MAX_VOLUNTARY_EXITS
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MIN_ATTESTATION_INCLUSION_DELAY
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MIN_DEPOSIT_AMOUNT
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MIN_EPOCHS_TO_INACTIVITY_PENALTY
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MIN_GENESIS_ACTIVE_VALIDATOR_COUNT
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MIN_GENESIS_TIME
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MIN_PER_EPOCH_CHURN_LIMIT
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MIN_SEED_LOOKAHEAD
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MIN_SLASHING_PENALTY_QUOTIENT
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MIN_VALIDATOR_WITHDRAWABILITY_DELAY
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PERSISTENT_COMMITTEE_PERIOD
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PROPOSER_REWARD_QUOTIENT
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SAFE_SLOTS_TO_UPDATE_JUSTIFIED
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SECONDS_PER_DAY
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SECONDS_PER_SLOT
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SHUFFLE_ROUND_COUNT
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SLOTS_PER_EPOCH
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SLOTS_PER_ETH1_VOTING_PERIOD
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SLOTS_PER_HISTORICAL_ROOT
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TARGET_COMMITTEE_SIZE
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VALIDATOR_REGISTRY_LIMIT
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WHISTLEBLOWER_REWARD_QUOTIENT
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const
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# These constants cannot really be overriden in a preset.
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# If we encounter them, we'll just ignore the preset value.
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dubiousConstants = {
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# They are derived from other constants:
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GENESIS_EPOCH,
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SECONDS_PER_DAY,
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# These are defined as an enum in datatypes.nim:
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DOMAIN_BEACON_ATTESTER,
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DOMAIN_BEACON_PROPOSER,
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DOMAIN_DEPOSIT,
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DOMAIN_RANDAO,
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DOMAIN_VOLUNTARY_EXIT,
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}
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const
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customTypes = {
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GENESIS_SLOT: "Slot",
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BLS_WITHDRAWAL_PREFIX: "byte",
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BASE_REWARD_FACTOR: "uint64",
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EFFECTIVE_BALANCE_INCREMENT: "uint64",
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EJECTION_BALANCE: "uint64",
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EPOCHS_PER_SLASHINGS_VECTOR: "uint64",
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INACTIVITY_PENALTY_QUOTIENT: "uint64",
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MAX_EFFECTIVE_BALANCE: "uint64",
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MIN_DEPOSIT_AMOUNT: "uint64",
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MIN_EPOCHS_TO_INACTIVITY_PENALTY: "uint64",
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MIN_VALIDATOR_WITHDRAWABILITY_DELAY: "uint64",
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PERSISTENT_COMMITTEE_PERIOD: "uint64",
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PROPOSER_REWARD_QUOTIENT: "uint64",
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SECONDS_PER_SLOT: "uint64",
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WHISTLEBLOWER_REWARD_QUOTIENT: "uint64",
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}.toTable
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template entireSet(T: type enum): untyped =
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{low(T) .. high(T)}
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macro loadCustomPreset*(path: static string): untyped =
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result = newStmtList()
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var
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presetContents = staticRead(path)
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presetConstants = dubiousConstants
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lineNum = 0
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for line in splitLines(presetContents):
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inc lineNum
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if line.len == 0 or line[0] == '#': continue
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template lineinfo: string =
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"$1($2) " % [path, $lineNum]
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var constParts = line.split(":")
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if constParts.len != 2:
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error lineinfo & "Invalid syntax: A preset file should include only assignments in the form 'ConstName: Value'"
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try:
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let constant = parseEnum[BeaconChainConstants](constParts[0])
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if constant in dubiousConstants: continue
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constParts.add customTypes.getOrDefault(constant, "int")
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presetConstants.incl constant
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except ValueError:
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warning lineinfo & "Unrecognized constant in a preset: " & constParts[0]
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continue
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result.add parseStmt("const $1* {.intdefine.} = $3($2)" % constParts)
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let missingConstants = BeaconChainConstants.entireSet - presetConstants
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if missingConstants.card > 0:
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warning "Missing constants in preset: " & $missingConstants
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