162 lines
5.2 KiB
Nim
162 lines
5.2 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2019 Status Research & Development GmbH
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# Licensed and distributed under either of
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# * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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# This file contains constants that are part of the spec and thus subject to
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# serialization and spec updates.
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import
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math
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type
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Slot* = distinct uint64
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Epoch* = distinct uint64
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{.experimental: "codeReordering".} # SLOTS_PER_EPOCH is use before being defined in spec
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const
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# Misc
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.2/configs/minimal.yaml#L4
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# Changed
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MAX_COMMITTEES_PER_SLOT* = 4
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TARGET_COMMITTEE_SIZE* = 4
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# Unchanged
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MAX_VALIDATORS_PER_COMMITTEE* = 2048
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MIN_PER_EPOCH_CHURN_LIMIT* = 4
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CHURN_LIMIT_QUOTIENT* = 2^16
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# Changed
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SHUFFLE_ROUND_COUNT* = 10
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MIN_GENESIS_ACTIVE_VALIDATOR_COUNT* {.intdefine.} = 64
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MIN_GENESIS_TIME* {.intdefine.} = 1578009600 # 3 Jan, 2020
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# Constants
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.4/specs/core/0_beacon-chain.md#constants
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# TODO "The following values are (non-configurable) constants" ...
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# Unchanged
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BASE_REWARDS_PER_EPOCH* = 4
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DEPOSIT_CONTRACT_TREE_DEPTH* = 32
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# Gwei values
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.2/configs/minimal.yaml#L50
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# Unchanged
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MIN_DEPOSIT_AMOUNT* = 2'u64^0 * 10'u64^9
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MAX_EFFECTIVE_BALANCE* = 2'u64^5 * 10'u64^9
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EJECTION_BALANCE* = 2'u64^4 * 10'u64^9
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EFFECTIVE_BALANCE_INCREMENT* = 2'u64^0 * 10'u64^9
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# Initial values
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.2/configs/minimal.yaml#L62
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# Unchanged
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GENESIS_SLOT* = 0.Slot
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GENESIS_FORK_VERSION* = 0x01000000
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BLS_WITHDRAWAL_PREFIX* = 0'u8
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# Time parameters
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.2/configs/minimal.yaml#L69
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# Changed: Faster to spin up testnets, but does not give validator
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# reasonable warning time for genesis
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MIN_GENESIS_DELAY* = 300
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# Unchanged
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SECONDS_PER_SLOT*{.intdefine.} = 6'u64
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# Unchanged
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MIN_ATTESTATION_INCLUSION_DELAY* = 1
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# Changed
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SLOTS_PER_EPOCH* {.intdefine.} = 8
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# Unchanged
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MIN_SEED_LOOKAHEAD* = 1
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MAX_SEED_LOOKAHEAD* = 4
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# Changed
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SLOTS_PER_ETH1_VOTING_PERIOD* = 16
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SLOTS_PER_HISTORICAL_ROOT* = 64
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# Unchanged
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MIN_VALIDATOR_WITHDRAWABILITY_DELAY* = 2'u64^8
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PERSISTENT_COMMITTEE_PERIOD* = 2'u64^11
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MAX_EPOCHS_PER_CROSSLINK* = 4
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# Changed
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MIN_EPOCHS_TO_INACTIVITY_PENALTY* = 2'u64^2
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EARLY_DERIVED_SECRET_PENALTY_MAX_FUTURE_EPOCHS* = 4096 # epochs
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EPOCHS_PER_CUSTODY_PERIOD* = 4
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CUSTODY_PERIOD_TO_RANDAO_PADDING* = 4
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# State vector lengths
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.2/configs/minimal.yaml#L101
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# Changed
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EPOCHS_PER_HISTORICAL_VECTOR* = 64
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EPOCHS_PER_SLASHINGS_VECTOR* = 64
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HISTORICAL_ROOTS_LIMIT* = 16777216
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VALIDATOR_REGISTRY_LIMIT* = 1099511627776
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# Reward and penalty quotients
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.2/configs/minimal.yaml#L113
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BASE_REWARD_FACTOR* = 2'u64^6
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WHISTLEBLOWER_REWARD_QUOTIENT* = 2'u64^9
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PROPOSER_REWARD_QUOTIENT* = 2'u64^3
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INACTIVITY_PENALTY_QUOTIENT* = 2'u64^25
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MIN_SLASHING_PENALTY_QUOTIENT* = 32 # 2^5
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# Max operations per block
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.2/configs/minimal.yaml#L127
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MAX_PROPOSER_SLASHINGS* = 2^4
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MAX_ATTESTER_SLASHINGS* = 2^0
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MAX_ATTESTATIONS* = 2^7
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MAX_DEPOSITS* = 2^4
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MAX_VOLUNTARY_EXITS* = 2^4
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# Fork choice
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.4/configs/minimal.yaml#L26
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# Changed
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SAFE_SLOTS_TO_UPDATE_JUSTIFIED* = 2
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# Validators
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.2/specs/validator/0_beacon-chain-validator.md#misc
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# Changed
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ETH1_FOLLOW_DISTANCE* = 16 # blocks
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# Unchanged
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TARGET_AGGREGATORS_PER_COMMITTEE* = 16 # validators
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RANDOM_SUBNETS_PER_VALIDATOR* = 1 # subnet
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EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION* = 256 # epochs ~ 27 hours
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SECONDS_PER_ETH1_BLOCK* = 14 # estimate from Eth1 mainnet)
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# Phase 1 - Sharding
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.9.4/configs/minimal.yaml#L153
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# TODO those are included in minimal.yaml but not mainnet.yaml
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# Why?
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SHARD_SLOTS_PER_BEACON_SLOT* = 2 # spec: SHARD_SLOTS_PER_EPOCH
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EPOCHS_PER_SHARD_PERIOD* = 4
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PHASE_1_FORK_EPOCH* = 8
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PHASE_1_FORK_SLOT* = 64
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