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nimbus-eth2/beacon_chain/spec/presets/minimal.nim

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# beacon_chain
# Copyright (c) 2018-2020 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.
# This file contains constants that are part of the spec and thus subject to
# serialization and spec updates.
import
math
type
Slot* = distinct uint64
Epoch* = distinct uint64
{.experimental: "codeReordering".} # SLOTS_PER_EPOCH is use before being defined in spec
const
# Misc
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/configs/minimal.yaml#L4
# Changed
MAX_COMMITTEES_PER_SLOT* = 4
TARGET_COMMITTEE_SIZE* = 4
# Unchanged
MAX_VALIDATORS_PER_COMMITTEE* = 2048
MIN_PER_EPOCH_CHURN_LIMIT* = 4
CHURN_LIMIT_QUOTIENT* = 2^16
# Changed
SHUFFLE_ROUND_COUNT* = 10
MIN_GENESIS_ACTIVE_VALIDATOR_COUNT* {.intdefine.} = 64
MIN_GENESIS_TIME* {.intdefine.} = 1578009600 # 3 Jan, 2020
# Unchanged
HYSTERESIS_QUOTIENT* = 4
HYSTERESIS_DOWNWARD_MULTIPLIER* = 1
HYSTERESIS_UPWARD_MULTIPLIER* = 5
# Constants
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/specs/phase0/beacon-chain.md#constants
# TODO "The following values are (non-configurable) constants" ...
# Unchanged
BASE_REWARDS_PER_EPOCH* = 4
DEPOSIT_CONTRACT_TREE_DEPTH* = 32
# Gwei values
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/configs/minimal.yaml#L58
# Unchanged
MIN_DEPOSIT_AMOUNT* = 2'u64^0 * 10'u64^9
MAX_EFFECTIVE_BALANCE* = 2'u64^5 * 10'u64^9
EJECTION_BALANCE* = 2'u64^4 * 10'u64^9
EFFECTIVE_BALANCE_INCREMENT* = 2'u64^0 * 10'u64^9
# Initial values
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/configs/minimal.yaml#L64
# Unchanged
GENESIS_SLOT* = 0.Slot
GENESIS_FORK_VERSION* = [0'u8, 0'u8, 0'u8, 1'u8]
BLS_WITHDRAWAL_PREFIX* = 0'u8
# Time parameters
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/configs/minimal.yaml#L77
# Changed: Faster to spin up testnets, but does not give validator
# reasonable warning time for genesis
MIN_GENESIS_DELAY* = 300
# Unchanged
SECONDS_PER_SLOT*{.intdefine.} = 6'u64
# Unchanged
MIN_ATTESTATION_INCLUSION_DELAY* = 1
# Changed
SLOTS_PER_EPOCH* {.intdefine.} = 8
# Unchanged
MIN_SEED_LOOKAHEAD* = 1
MAX_SEED_LOOKAHEAD* = 4
# Changed
EPOCHS_PER_ETH1_VOTING_PERIOD* = 2
SLOTS_PER_HISTORICAL_ROOT* = 64
# Unchanged
MIN_VALIDATOR_WITHDRAWABILITY_DELAY* = 2'u64^8
# Changed
PERSISTENT_COMMITTEE_PERIOD* = 128
# Unchanged
MAX_EPOCHS_PER_CROSSLINK* = 4
# Changed
MIN_EPOCHS_TO_INACTIVITY_PENALTY* = 2'u64^2
# State vector lengths
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/configs/minimal.yaml#L105
# Changed
EPOCHS_PER_HISTORICAL_VECTOR* = 64
EPOCHS_PER_SLASHINGS_VECTOR* = 64
HISTORICAL_ROOTS_LIMIT* = 16777216
VALIDATOR_REGISTRY_LIMIT* = 1099511627776
# Reward and penalty quotients
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/configs/minimal.yaml#L117
BASE_REWARD_FACTOR* = 2'u64^6
WHISTLEBLOWER_REWARD_QUOTIENT* = 2'u64^9
PROPOSER_REWARD_QUOTIENT* = 2'u64^3
INACTIVITY_PENALTY_QUOTIENT* = 2'u64^25
MIN_SLASHING_PENALTY_QUOTIENT* = 32 # 2^5
# Max operations per block
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/configs/minimal.yaml#L131
MAX_PROPOSER_SLASHINGS* = 2^4
MAX_ATTESTER_SLASHINGS* = 2^0
MAX_ATTESTATIONS* = 2^7
MAX_DEPOSITS* = 2^4
MAX_VOLUNTARY_EXITS* = 2^4
# Fork choice
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/configs/minimal.yaml#L26
# Changed
SAFE_SLOTS_TO_UPDATE_JUSTIFIED* = 2
# Validators
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.1/configs/minimal.yaml#L38
# Changed
ETH1_FOLLOW_DISTANCE* = 16 # blocks
# Unchanged
TARGET_AGGREGATORS_PER_COMMITTEE* = 16 # validators
RANDOM_SUBNETS_PER_VALIDATOR* = 1 # subnet
EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION* = 256 # epochs ~ 27 hours
SECONDS_PER_ETH1_BLOCK* = 14 # estimate from Eth1 mainnet)
# Phase 1: Upgrade from Phase 0
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.0/configs/minimal.yaml#L161
PHASE_1_FORK_VERSION* = 16777217
INITIAL_ACTIVE_SHARDS* = 4
INITIAL_GASPRICE* = 10
# Phase 1: General
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.0/configs/minimal.yaml#L171
MAX_SHARDS* = 8
ONLINE_PERIOD* = 8 # epochs ~ 51 minutes
LIGHT_CLIENT_COMMITTEE_SIZE* = 128
LIGHT_CLIENT_COMMITTEE_PERIOD* = 256 # epochs
SHARD_COMMITTEE_PERIOD* = 256 # epochs
SHARD_BLOCK_CHUNK_SIZE* = 262144
MAX_SHARD_BLOCK_CHUNKS* = 4
TARGET_SHARD_BLOCK_SIZE* = 196608
MAX_SHARD_BLOCKS_PER_ATTESTATION* = 12
MAX_GASPRICE* = 16384 # Gwei
MIN_GASPRICE* = 32 # Gwei
GASPRICE_ADJUSTMENT_COEFFICIENT* = 8
# Phase 1 - Custody game
# ---------------------------------------------------------------
# https://github.com/ethereum/eth2.0-specs/blob/v0.10.1/specs/phase1/custody-game.md#constants
# TODO those are included in minimal.yaml but not mainnet.yaml
# Why?
RANDAO_PENALTY_EPOCHS* = 2
EARLY_DERIVED_SECRET_PENALTY_MAX_FUTURE_EPOCHS* = 4096 # epochs
EPOCHS_PER_CUSTODY_PERIOD* = 2048
# Time parameters
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.0/configs/minimal.yaml#L204
CUSTODY_PERIOD_TO_RANDAO_PADDING* = 2048
MAX_REVEAL_LATENESS_DECREMENT* = 128
# Max operations
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.0/configs/minimal.yaml#L216
MAX_CUSTODY_KEY_REVEALS* = 256
MAX_EARLY_DERIVED_SECRET_REVEALS* = 1
MAX_CUSTODY_SLASHINGS* = 1
# Reward and penalty quotients
# https://github.com/ethereum/eth2.0-specs/blob/v0.11.0/configs/minimal.yaml#L222
EARLY_DERIVED_SECRET_REVEAL_SLOT_REWARD_MULTIPLE* = 2
MINOR_REWARD_QUOTIENT* = 256
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