177 lines
6.9 KiB
Nim
177 lines
6.9 KiB
Nim
# beacon_chain
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# Copyright (c) 2018-2020 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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{.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/v1.0.0/configs/mainnet/phase0.yaml#L5
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CONFIG_NAME* = "mainnet"
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MAX_COMMITTEES_PER_SLOT* {.intdefine.}: uint64 = 64
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TARGET_COMMITTEE_SIZE*: uint64 = 128 ##\
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## Number of validators in the committee attesting to one shard
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## Per spec:
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## For the safety of crosslinks `TARGET_COMMITTEE_SIZE` exceeds
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## [the recommended minimum committee size of 111](https://vitalik.ca/files/Ithaca201807_Sharding.pdf);
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## with sufficient active validators (at least
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## `SLOTS_PER_EPOCH * TARGET_COMMITTEE_SIZE`), the shuffling algorithm ensures
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## committee sizes at least `TARGET_COMMITTEE_SIZE`. (Unbiasable randomness
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## with a Verifiable Delay Function (VDF) will improve committee robustness
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## and lower the safe minimum committee size.)
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MAX_VALIDATORS_PER_COMMITTEE*: uint64 = 2048 ##\
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## votes
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MIN_PER_EPOCH_CHURN_LIMIT*: uint64 = 4
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CHURN_LIMIT_QUOTIENT*: uint64 = 2'u64 ^ 16
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SHUFFLE_ROUND_COUNT*: uint64 = 90
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# MIN_GENESIS_ACTIVE_VALIDATOR_COUNT and MIN_GENESIS_TIME are runtime presets
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HYSTERESIS_QUOTIENT*: uint64 = 4
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HYSTERESIS_DOWNWARD_MULTIPLIER*: uint64 = 1
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HYSTERESIS_UPWARD_MULTIPLIER*: uint64 = 5
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# Gwei values
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/configs/mainnet/phase0.yaml#L60
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MIN_DEPOSIT_AMOUNT*: uint64 = 2'u64^0 * 10'u64^9 ##\
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## Minimum amounth of ETH that can be deposited in one call - deposits can
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## be used either to top up an existing validator or commit to a new one
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MAX_EFFECTIVE_BALANCE*: uint64 = 2'u64^5 * 10'u64^9 ##\
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## Maximum amounth of ETH that can be deposited in one call
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EJECTION_BALANCE*: uint64 = 2'u64^4 * 10'u64^9 ##\
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## Once the balance of a validator drops below this, it will be ejected from
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## the validator pool
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EFFECTIVE_BALANCE_INCREMENT*: uint64 = 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/v1.0.0/configs/mainnet/phase0.yaml#L72
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# GENESIS_FORK_VERSION is a runtime preset
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BLS_WITHDRAWAL_PREFIX*: byte = 0
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# Time parameters
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/configs/mainnet/phase0.yaml#L79
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# GENESIS_DELAY is a runtime preset
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SECONDS_PER_SLOT* {.intdefine.}: uint64 = 12'u64 # Compile with -d:SECONDS_PER_SLOT=1 for 12x faster slots
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## TODO consistent time unit across projects, similar to C++ chrono?
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MIN_ATTESTATION_INCLUSION_DELAY*: uint64 = 1 ##\
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## (12 seconds)
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## Number of slots that attestations stay in the attestation
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## pool before being added to a block.
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## The attestation delay exists so that there is time for attestations to
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## propagate before the block is created.
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## When creating an attestation, the validator will look at the best
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## information known to at that time, and may not revise it during the same
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## slot (see `is_double_vote`) - the delay gives the validator a chance to
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## wait towards the end of the slot and still have time to publish the
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## attestation.
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SLOTS_PER_EPOCH* {.intdefine.}: uint64 = 32 ##\
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## (~6.4 minutes)
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## slots that make up an epoch, at the end of which more heavy
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## processing is done
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## Compile with -d:SLOTS_PER_EPOCH=4 for shorter epochs
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MIN_SEED_LOOKAHEAD*: uint64 = 1 ##\
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## epochs (~6.4 minutes)
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MAX_SEED_LOOKAHEAD*: uint64 = 4 ##\
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## epochs (~25.6 minutes)
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EPOCHS_PER_ETH1_VOTING_PERIOD*: uint64 = 64 ##\
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## epochs (~6.8 hours)
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SLOTS_PER_HISTORICAL_ROOT*: uint64 = 8192 ##\
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## slots (13 hours)
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MIN_VALIDATOR_WITHDRAWABILITY_DELAY*: uint64 = 2'u64^8 ##\
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## epochs (~27 hours)
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SHARD_COMMITTEE_PERIOD*: uint64 = 256 # epochs (~27 hours)
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MIN_EPOCHS_TO_INACTIVITY_PENALTY*: uint64 = 2'u64^2 ##\
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## epochs (25.6 minutes)
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# State vector lengths
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/configs/mainnet/phase0.yaml#L105
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EPOCHS_PER_HISTORICAL_VECTOR*: uint64 = 65536 ##\
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## epochs (~0.8 years)
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EPOCHS_PER_SLASHINGS_VECTOR*: uint64 = 8192 ##\
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## epochs (~36 days)
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HISTORICAL_ROOTS_LIMIT*: uint64 = 16777216 ##\
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## epochs (~26,131 years)
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VALIDATOR_REGISTRY_LIMIT*: uint64 = 1099511627776'u64
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# Reward and penalty quotients
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/configs/mainnet/phase0.yaml#L117
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BASE_REWARD_FACTOR*: uint64 = 2'u64^6
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WHISTLEBLOWER_REWARD_QUOTIENT*: uint64 = 2'u64^9
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PROPOSER_REWARD_QUOTIENT*: uint64 = 2'u64^3
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INACTIVITY_PENALTY_QUOTIENT*: uint64 = 2'u64^26
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MIN_SLASHING_PENALTY_QUOTIENT*: uint64 = 128 # 2^7
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PROPORTIONAL_SLASHING_MULTIPLIER*: uint64 = 1
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# Max operations per block
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/configs/mainnet/phase0.yaml#L133
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MAX_PROPOSER_SLASHINGS*: uint64 = 2'u64 ^ 4
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MAX_ATTESTER_SLASHINGS*: uint64 = 2'u64 ^ 1
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MAX_ATTESTATIONS*: uint64 = 2'u64 ^ 7
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MAX_DEPOSITS*: uint64 = 2'u64 ^ 4
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MAX_VOLUNTARY_EXITS*: uint64 = 2'u64 ^ 4
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# Fork choice
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/configs/mainnet/phase0.yaml#L31
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SAFE_SLOTS_TO_UPDATE_JUSTIFIED*: uint64 = 8 # 96 seconds
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# Validators
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/configs/mainnet/phase0.yaml#L37
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# ETH1_FOLLOW_DISTANCE is a runtime preset
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TARGET_AGGREGATORS_PER_COMMITTEE*: uint64 = 16 # validators
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RANDOM_SUBNETS_PER_VALIDATOR*: uint64 = 1 # subnet
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EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION*: uint64 = 256 # epochs ~ 27 hours
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SECONDS_PER_ETH1_BLOCK* {.intdefine.}: uint64 = 14 # (estimate from Eth1 mainnet)
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# Deposit contract
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v1.0.0/configs/mainnet/phase0.yaml#L51
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# Ethereum PoW Mainnet
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# TODO(zah) These violate the spec (this is a temporary change to allow `make medalla` to work)
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DEPOSIT_CHAIN_ID* = 5
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DEPOSIT_NETWORK_ID* = 5
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