148 lines
4.7 KiB
Nim
148 lines
4.7 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 http://opensource.org/licenses/MIT).
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# * Apache v2 license (license terms in the root directory or at http://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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# Standard library
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math,
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# Third-party
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eth/common,
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# Internals
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../crypto, ../digest
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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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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.1/configs/constant_presets/minimal.yaml
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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/v0.7.1/specs/core/0_beacon-chain.md#misc
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# Changed
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SHARD_COUNT* {.intdefine.} = 8
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TARGET_COMMITTEE_SIZE* = 4
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# Unchanged
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MAX_VALIDATORS_PER_COMMITTEE* = 4096
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MIN_PER_EPOCH_CHURN_LIMIT* = 4
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CHURN_LIMIT_QUOTIENT* = 2^16
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BASE_REWARDS_PER_EPOCH* = 5
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# Changed
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SHUFFLE_ROUND_COUNT* = 10
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# Constants
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.8.2/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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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/v0.8.2/specs/core/0_beacon-chain.md#gwei-values
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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/v0.7.1/configs/constant_presets/minimal.yaml#L43
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# Unchanged
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GENESIS_FORK_VERSION* = [0'u8, 0'u8, 0'u8, 0'u8]
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GENESIS_SLOT* = 0.Slot
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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/v0.8.2/specs/core/0_fork-choice.md#time-parameters
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# Unchanged
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SECONDS_PER_SLOT*{.intdefine.} = 6'u64
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# https://github.com/ethereum/eth2.0-specs/blob/v0.8.2/specs/core/0_beacon-chain.md#time-parameters
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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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ACTIVATION_EXIT_DELAY* = 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 # doesn't work with GENESIS_SLOT == 0?
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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* = 2'u64^6
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MIN_EPOCHS_TO_INACTIVITY_PENALTY* = 2'u64^2
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# State list lengths
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.7.1/specs/core/0_beacon-chain.md#state-list-lengths
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# Changed
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LATEST_RANDAO_MIXES_LENGTH* = 64
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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/v0.8.2/specs/core/0_beacon-chain.md#rewards-and-penalties
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# Unchanged
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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/v0.8.2/specs/core/0_beacon-chain.md#max-operations-per-block
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# Unchanged
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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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MAX_TRANSFERS* = 0
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MIN_GENESIS_TIME* {.intdefine.} = 0
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MIN_GENESIS_ACTIVE_VALIDATOR_COUNT* {.intdefine.} = 99
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type
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# Signature domains
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# ---------------------------------------------------------------
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# https://github.com/ethereum/eth2.0-specs/blob/v0.8.2/specs/core/0_beacon-chain.md#signature-domain-types
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DomainType* {.pure.} = enum
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DOMAIN_BEACON_PROPOSER = 0
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DOMAIN_RANDAO = 1
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DOMAIN_ATTESTATION = 2
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DOMAIN_DEPOSIT = 3
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DOMAIN_VOLUNTARY_EXIT = 4
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DOMAIN_TRANSFER = 5
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