// Package params defines important constants that are essential to Prysm services. package params import ( "time" "github.com/ethereum/go-ethereum/common" types "github.com/prysmaticlabs/eth2-types" "github.com/prysmaticlabs/prysm/encoding/bytesutil" ) // BeaconChainConfig contains constant configs for node to participate in beacon chain. type BeaconChainConfig struct { // Constants (non-configurable) GenesisSlot types.Slot `yaml:"GENESIS_SLOT"` // GenesisSlot represents the first canonical slot number of the beacon chain. GenesisEpoch types.Epoch `yaml:"GENESIS_EPOCH"` // GenesisEpoch represents the first canonical epoch number of the beacon chain. FarFutureEpoch types.Epoch `yaml:"FAR_FUTURE_EPOCH"` // FarFutureEpoch represents a epoch extremely far away in the future used as the default penalization epoch for validators. FarFutureSlot types.Slot `yaml:"FAR_FUTURE_SLOT"` // FarFutureSlot represents a slot extremely far away in the future. BaseRewardsPerEpoch uint64 `yaml:"BASE_REWARDS_PER_EPOCH"` // BaseRewardsPerEpoch is used to calculate the per epoch rewards. DepositContractTreeDepth uint64 `yaml:"DEPOSIT_CONTRACT_TREE_DEPTH"` // DepositContractTreeDepth depth of the Merkle trie of deposits in the validator deposit contract on the PoW chain. JustificationBitsLength uint64 `yaml:"JUSTIFICATION_BITS_LENGTH"` // JustificationBitsLength defines number of epochs to track when implementing k-finality in Casper FFG. // Misc constants. PresetBase string `yaml:"PRESET_BASE" spec:"true"` // PresetBase represents the underlying spec preset this config is based on. ConfigName string `yaml:"CONFIG_NAME" spec:"true"` // ConfigName for allowing an easy human-readable way of knowing what chain is being used. TargetCommitteeSize uint64 `yaml:"TARGET_COMMITTEE_SIZE" spec:"true"` // TargetCommitteeSize is the number of validators in a committee when the chain is healthy. MaxValidatorsPerCommittee uint64 `yaml:"MAX_VALIDATORS_PER_COMMITTEE" spec:"true"` // MaxValidatorsPerCommittee defines the upper bound of the size of a committee. MaxCommitteesPerSlot uint64 `yaml:"MAX_COMMITTEES_PER_SLOT" spec:"true"` // MaxCommitteesPerSlot defines the max amount of committee in a single slot. MinPerEpochChurnLimit uint64 `yaml:"MIN_PER_EPOCH_CHURN_LIMIT" spec:"true"` // MinPerEpochChurnLimit is the minimum amount of churn allotted for validator rotations. ChurnLimitQuotient uint64 `yaml:"CHURN_LIMIT_QUOTIENT" spec:"true"` // ChurnLimitQuotient is used to determine the limit of how many validators can rotate per epoch. ShuffleRoundCount uint64 `yaml:"SHUFFLE_ROUND_COUNT" spec:"true"` // ShuffleRoundCount is used for retrieving the permuted index. MinGenesisActiveValidatorCount uint64 `yaml:"MIN_GENESIS_ACTIVE_VALIDATOR_COUNT" spec:"true"` // MinGenesisActiveValidatorCount defines how many validator deposits needed to kick off beacon chain. MinGenesisTime uint64 `yaml:"MIN_GENESIS_TIME" spec:"true"` // MinGenesisTime is the time that needed to pass before kicking off beacon chain. TargetAggregatorsPerCommittee uint64 `yaml:"TARGET_AGGREGATORS_PER_COMMITTEE" spec:"true"` // TargetAggregatorsPerCommittee defines the number of aggregators inside one committee. HysteresisQuotient uint64 `yaml:"HYSTERESIS_QUOTIENT" spec:"true"` // HysteresisQuotient defines the hysteresis quotient for effective balance calculations. HysteresisDownwardMultiplier uint64 `yaml:"HYSTERESIS_DOWNWARD_MULTIPLIER" spec:"true"` // HysteresisDownwardMultiplier defines the hysteresis downward multiplier for effective balance calculations. HysteresisUpwardMultiplier uint64 `yaml:"HYSTERESIS_UPWARD_MULTIPLIER" spec:"true"` // HysteresisUpwardMultiplier defines the hysteresis upward multiplier for effective balance calculations. // Gwei value constants. MinDepositAmount uint64 `yaml:"MIN_DEPOSIT_AMOUNT" spec:"true"` // MinDepositAmount is the minimum amount of Gwei a validator can send to the deposit contract at once (lower amounts will be reverted). MaxEffectiveBalance uint64 `yaml:"MAX_EFFECTIVE_BALANCE" spec:"true"` // MaxEffectiveBalance is the maximal amount of Gwei that is effective for staking. EjectionBalance uint64 `yaml:"EJECTION_BALANCE" spec:"true"` // EjectionBalance is the minimal GWei a validator needs to have before ejected. EffectiveBalanceIncrement uint64 `yaml:"EFFECTIVE_BALANCE_INCREMENT" spec:"true"` // EffectiveBalanceIncrement is used for converting the high balance into the low balance for validators. // Initial value constants. BLSWithdrawalPrefixByte byte `yaml:"BLS_WITHDRAWAL_PREFIX" spec:"true"` // BLSWithdrawalPrefixByte is used for BLS withdrawal and it's the first byte. ZeroHash [32]byte // ZeroHash is used to represent a zeroed out 32 byte array. // Time parameters constants. GenesisDelay uint64 `yaml:"GENESIS_DELAY" spec:"true"` // GenesisDelay is the minimum number of seconds to delay starting the Ethereum Beacon Chain genesis. Must be at least 1 second. MinAttestationInclusionDelay types.Slot `yaml:"MIN_ATTESTATION_INCLUSION_DELAY" spec:"true"` // MinAttestationInclusionDelay defines how many slots validator has to wait to include attestation for beacon block. SecondsPerSlot uint64 `yaml:"SECONDS_PER_SLOT" spec:"true"` // SecondsPerSlot is how many seconds are in a single slot. SlotsPerEpoch types.Slot `yaml:"SLOTS_PER_EPOCH" spec:"true"` // SlotsPerEpoch is the number of slots in an epoch. SqrRootSlotsPerEpoch types.Slot // SqrRootSlotsPerEpoch is a hard coded value where we take the square root of `SlotsPerEpoch` and round down. MinSeedLookahead types.Epoch `yaml:"MIN_SEED_LOOKAHEAD" spec:"true"` // MinSeedLookahead is the duration of randao look ahead seed. MaxSeedLookahead types.Epoch `yaml:"MAX_SEED_LOOKAHEAD" spec:"true"` // MaxSeedLookahead is the duration a validator has to wait for entry and exit in epoch. EpochsPerEth1VotingPeriod types.Epoch `yaml:"EPOCHS_PER_ETH1_VOTING_PERIOD" spec:"true"` // EpochsPerEth1VotingPeriod defines how often the merkle root of deposit receipts get updated in beacon node on per epoch basis. SlotsPerHistoricalRoot types.Slot `yaml:"SLOTS_PER_HISTORICAL_ROOT" spec:"true"` // SlotsPerHistoricalRoot defines how often the historical root is saved. MinValidatorWithdrawabilityDelay types.Epoch `yaml:"MIN_VALIDATOR_WITHDRAWABILITY_DELAY" spec:"true"` // MinValidatorWithdrawabilityDelay is the shortest amount of time a validator has to wait to withdraw. ShardCommitteePeriod types.Epoch `yaml:"SHARD_COMMITTEE_PERIOD" spec:"true"` // ShardCommitteePeriod is the minimum amount of epochs a validator must participate before exiting. MinEpochsToInactivityPenalty types.Epoch `yaml:"MIN_EPOCHS_TO_INACTIVITY_PENALTY" spec:"true"` // MinEpochsToInactivityPenalty defines the minimum amount of epochs since finality to begin penalizing inactivity. Eth1FollowDistance uint64 `yaml:"ETH1_FOLLOW_DISTANCE" spec:"true"` // Eth1FollowDistance is the number of eth1.0 blocks to wait before considering a new deposit for voting. This only applies after the chain as been started. SafeSlotsToUpdateJustified types.Slot `yaml:"SAFE_SLOTS_TO_UPDATE_JUSTIFIED" spec:"true"` // SafeSlotsToUpdateJustified is the minimal slots needed to update justified check point. SecondsPerETH1Block uint64 `yaml:"SECONDS_PER_ETH1_BLOCK" spec:"true"` // SecondsPerETH1Block is the approximate time for a single eth1 block to be produced. // Ethereum PoW parameters. DepositChainID uint64 `yaml:"DEPOSIT_CHAIN_ID" spec:"true"` // DepositChainID of the eth1 network. This used for replay protection. DepositNetworkID uint64 `yaml:"DEPOSIT_NETWORK_ID" spec:"true"` // DepositNetworkID of the eth1 network. This used for replay protection. DepositContractAddress string `yaml:"DEPOSIT_CONTRACT_ADDRESS" spec:"true"` // DepositContractAddress is the address of the deposit contract. // Validator parameters. RandomSubnetsPerValidator uint64 `yaml:"RANDOM_SUBNETS_PER_VALIDATOR" spec:"true"` // RandomSubnetsPerValidator specifies the amount of subnets a validator has to be subscribed to at one time. EpochsPerRandomSubnetSubscription uint64 `yaml:"EPOCHS_PER_RANDOM_SUBNET_SUBSCRIPTION" spec:"true"` // EpochsPerRandomSubnetSubscription specifies the minimum duration a validator is connected to their subnet. // State list lengths EpochsPerHistoricalVector types.Epoch `yaml:"EPOCHS_PER_HISTORICAL_VECTOR" spec:"true"` // EpochsPerHistoricalVector defines max length in epoch to store old historical stats in beacon state. EpochsPerSlashingsVector types.Epoch `yaml:"EPOCHS_PER_SLASHINGS_VECTOR" spec:"true"` // EpochsPerSlashingsVector defines max length in epoch to store old stats to recompute slashing witness. HistoricalRootsLimit uint64 `yaml:"HISTORICAL_ROOTS_LIMIT" spec:"true"` // HistoricalRootsLimit defines max historical roots that can be saved in state before roll over. ValidatorRegistryLimit uint64 `yaml:"VALIDATOR_REGISTRY_LIMIT" spec:"true"` // ValidatorRegistryLimit defines the upper bound of validators can participate in eth2. // Reward and penalty quotients constants. BaseRewardFactor uint64 `yaml:"BASE_REWARD_FACTOR" spec:"true"` // BaseRewardFactor is used to calculate validator per-slot interest rate. WhistleBlowerRewardQuotient uint64 `yaml:"WHISTLEBLOWER_REWARD_QUOTIENT" spec:"true"` // WhistleBlowerRewardQuotient is used to calculate whistle blower reward. ProposerRewardQuotient uint64 `yaml:"PROPOSER_REWARD_QUOTIENT" spec:"true"` // ProposerRewardQuotient is used to calculate the reward for proposers. InactivityPenaltyQuotient uint64 `yaml:"INACTIVITY_PENALTY_QUOTIENT" spec:"true"` // InactivityPenaltyQuotient is used to calculate the penalty for a validator that is offline. MinSlashingPenaltyQuotient uint64 `yaml:"MIN_SLASHING_PENALTY_QUOTIENT" spec:"true"` // MinSlashingPenaltyQuotient is used to calculate the minimum penalty to prevent DoS attacks. ProportionalSlashingMultiplier uint64 `yaml:"PROPORTIONAL_SLASHING_MULTIPLIER" spec:"true"` // ProportionalSlashingMultiplier is used as a multiplier on slashed penalties. // Max operations per block constants. MaxProposerSlashings uint64 `yaml:"MAX_PROPOSER_SLASHINGS" spec:"true"` // MaxProposerSlashings defines the maximum number of slashings of proposers possible in a block. MaxAttesterSlashings uint64 `yaml:"MAX_ATTESTER_SLASHINGS" spec:"true"` // MaxAttesterSlashings defines the maximum number of casper FFG slashings possible in a block. MaxAttestations uint64 `yaml:"MAX_ATTESTATIONS" spec:"true"` // MaxAttestations defines the maximum allowed attestations in a beacon block. MaxDeposits uint64 `yaml:"MAX_DEPOSITS" spec:"true"` // MaxDeposits defines the maximum number of validator deposits in a block. MaxVoluntaryExits uint64 `yaml:"MAX_VOLUNTARY_EXITS" spec:"true"` // MaxVoluntaryExits defines the maximum number of validator exits in a block. // BLS domain values. DomainBeaconProposer [4]byte `yaml:"DOMAIN_BEACON_PROPOSER" spec:"true"` // DomainBeaconProposer defines the BLS signature domain for beacon proposal verification. DomainRandao [4]byte `yaml:"DOMAIN_RANDAO" spec:"true"` // DomainRandao defines the BLS signature domain for randao verification. DomainBeaconAttester [4]byte `yaml:"DOMAIN_BEACON_ATTESTER" spec:"true"` // DomainBeaconAttester defines the BLS signature domain for attestation verification. DomainDeposit [4]byte `yaml:"DOMAIN_DEPOSIT" spec:"true"` // DomainDeposit defines the BLS signature domain for deposit verification. DomainVoluntaryExit [4]byte `yaml:"DOMAIN_VOLUNTARY_EXIT" spec:"true"` // DomainVoluntaryExit defines the BLS signature domain for exit verification. DomainSelectionProof [4]byte `yaml:"DOMAIN_SELECTION_PROOF" spec:"true"` // DomainSelectionProof defines the BLS signature domain for selection proof. DomainAggregateAndProof [4]byte `yaml:"DOMAIN_AGGREGATE_AND_PROOF" spec:"true"` // DomainAggregateAndProof defines the BLS signature domain for aggregate and proof. DomainSyncCommittee [4]byte `yaml:"DOMAIN_SYNC_COMMITTEE" spec:"true"` // DomainVoluntaryExit defines the BLS signature domain for sync committee. DomainSyncCommitteeSelectionProof [4]byte `yaml:"DOMAIN_SYNC_COMMITTEE_SELECTION_PROOF" spec:"true"` // DomainSelectionProof defines the BLS signature domain for sync committee selection proof. DomainContributionAndProof [4]byte `yaml:"DOMAIN_CONTRIBUTION_AND_PROOF" spec:"true"` // DomainAggregateAndProof defines the BLS signature domain for contribution and proof. // Prysm constants. GweiPerEth uint64 // GweiPerEth is the amount of gwei corresponding to 1 eth. BLSSecretKeyLength int // BLSSecretKeyLength defines the expected length of BLS secret keys in bytes. BLSPubkeyLength int // BLSPubkeyLength defines the expected length of BLS public keys in bytes. BLSSignatureLength int // BLSSignatureLength defines the expected length of BLS signatures in bytes. DefaultBufferSize int // DefaultBufferSize for channels across the Prysm repository. ValidatorPrivkeyFileName string // ValidatorPrivKeyFileName specifies the string name of a validator private key file. WithdrawalPrivkeyFileName string // WithdrawalPrivKeyFileName specifies the string name of a withdrawal private key file. RPCSyncCheck time.Duration // Number of seconds to query the sync service, to find out if the node is synced or not. EmptySignature [96]byte // EmptySignature is used to represent a zeroed out BLS Signature. DefaultPageSize int // DefaultPageSize defines the default page size for RPC server request. MaxPeersToSync int // MaxPeersToSync describes the limit for number of peers in round robin sync. SlotsPerArchivedPoint types.Slot // SlotsPerArchivedPoint defines the number of slots per one archived point. GenesisCountdownInterval time.Duration // How often to log the countdown until the genesis time is reached. BeaconStateFieldCount int // BeaconStateFieldCount defines how many fields are in beacon state. BeaconStateAltairFieldCount int // BeaconStateAltairFieldCount defines how many fields are in beacon state hard fork 1. BeaconStateMergeFieldCount int // BeaconStateMergeFieldCount defines how many fields are in beacon state post upgrade to the Merge. // Slasher constants. WeakSubjectivityPeriod types.Epoch // WeakSubjectivityPeriod defines the time period expressed in number of epochs were proof of stake network should validate block headers and attestations for slashable events. PruneSlasherStoragePeriod types.Epoch // PruneSlasherStoragePeriod defines the time period expressed in number of epochs were proof of stake network should prune attestation and block header store. // Slashing protection constants. SlashingProtectionPruningEpochs types.Epoch // SlashingProtectionPruningEpochs defines a period after which all prior epochs are pruned in the validator database. // Fork-related values. GenesisForkVersion []byte `yaml:"GENESIS_FORK_VERSION" spec:"true"` // GenesisForkVersion is used to track fork version between state transitions. AltairForkVersion []byte `yaml:"ALTAIR_FORK_VERSION" spec:"true"` // AltairForkVersion is used to represent the fork version for altair. AltairForkEpoch types.Epoch `yaml:"ALTAIR_FORK_EPOCH" spec:"true"` // AltairForkEpoch is used to represent the assigned fork epoch for altair. MergeForkVersion []byte `yaml:"MERGE_FORK_VERSION" spec:"true"` // MergeForkVersion is used to represent the fork version for the merge. MergeForkEpoch types.Epoch `yaml:"MERGE_FORK_EPOCH" spec:"true"` // MergeForkEpoch is used to represent the assigned fork epoch for the merge. ShardingForkVersion []byte `yaml:"SHARDING_FORK_VERSION" spec:"true"` // ShardingForkVersion is used to represent the fork version for sharding. ShardingForkEpoch types.Epoch `yaml:"SHARDING_FORK_EPOCH" spec:"true"` // ShardingForkEpoch is used to represent the assigned fork epoch for sharding. ForkVersionSchedule map[[4]byte]types.Epoch // Schedule of fork epochs by version. MinAnchorPowBlockDifficulty uint64 `yaml:"MIN_ANCHOR_POW_BLOCK_DIFFICULTY" spec:"true"` // MinAnchorPowBlockDifficulty specifies the target chain difficulty at the time of the merge. TransitionTotalDifficulty uint64 `yaml:"TRANSITION_TOTAL_DIFFICULTY" spec:"true"` // TransitionTotalDifficulty is part of the experimental merge spec. This value is not used (yet) and is expected to be a uint256. // Weak subjectivity values. SafetyDecay uint64 // SafetyDecay is defined as the loss in the 1/3 consensus safety margin of the casper FFG mechanism. // New values introduced in Altair hard fork 1. // Participation flag indices. TimelySourceFlagIndex uint8 `yaml:"TIMELY_SOURCE_FLAG_INDEX" spec:"true"` // TimelySourceFlagIndex is the source flag position of the participation bits. TimelyTargetFlagIndex uint8 `yaml:"TIMELY_TARGET_FLAG_INDEX" spec:"true"` // TimelyTargetFlagIndex is the target flag position of the participation bits. TimelyHeadFlagIndex uint8 `yaml:"TIMELY_HEAD_FLAG_INDEX" spec:"true"` // TimelyHeadFlagIndex is the head flag position of the participation bits. // Incentivization weights. TimelySourceWeight uint64 `yaml:"TIMELY_SOURCE_WEIGHT" spec:"true"` // TimelySourceWeight is the factor of how much source rewards receives. TimelyTargetWeight uint64 `yaml:"TIMELY_TARGET_WEIGHT" spec:"true"` // TimelyTargetWeight is the factor of how much target rewards receives. TimelyHeadWeight uint64 `yaml:"TIMELY_HEAD_WEIGHT" spec:"true"` // TimelyHeadWeight is the factor of how much head rewards receives. SyncRewardWeight uint64 `yaml:"SYNC_REWARD_WEIGHT" spec:"true"` // SyncRewardWeight is the factor of how much sync committee rewards receives. WeightDenominator uint64 `yaml:"WEIGHT_DENOMINATOR" spec:"true"` // WeightDenominator accounts for total rewards denomination. ProposerWeight uint64 `yaml:"PROPOSER_WEIGHT" spec:"true"` // ProposerWeight is the factor of how much proposer rewards receives. // Validator related. TargetAggregatorsPerSyncSubcommittee uint64 `yaml:"TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE" spec:"true"` // TargetAggregatorsPerSyncSubcommittee for aggregating in sync committee. SyncCommitteeSubnetCount uint64 `yaml:"SYNC_COMMITTEE_SUBNET_COUNT" spec:"true"` // SyncCommitteeSubnetCount for sync committee subnet count. // Misc. SyncCommitteeSize uint64 `yaml:"SYNC_COMMITTEE_SIZE" spec:"true"` // SyncCommitteeSize for light client sync committee size. InactivityScoreBias uint64 `yaml:"INACTIVITY_SCORE_BIAS" spec:"true"` // InactivityScoreBias for calculating score bias penalties during inactivity InactivityScoreRecoveryRate uint64 `yaml:"INACTIVITY_SCORE_RECOVERY_RATE" spec:"true"` // InactivityScoreRecoveryRate for recovering score bias penalties during inactivity. EpochsPerSyncCommitteePeriod types.Epoch `yaml:"EPOCHS_PER_SYNC_COMMITTEE_PERIOD" spec:"true"` // EpochsPerSyncCommitteePeriod defines how many epochs per sync committee period. // Updated penalty values. This moves penalty parameters toward their final, maximum security values. // Note: We do not override previous configuration values but instead creates new values and replaces usage throughout. InactivityPenaltyQuotientAltair uint64 `yaml:"INACTIVITY_PENALTY_QUOTIENT_ALTAIR" spec:"true"` // InactivityPenaltyQuotientAltair for penalties during inactivity post Altair hard fork. MinSlashingPenaltyQuotientAltair uint64 `yaml:"MIN_SLASHING_PENALTY_QUOTIENT_ALTAIR" spec:"true"` // MinSlashingPenaltyQuotientAltair for slashing penalties post Altair hard fork. ProportionalSlashingMultiplierAltair uint64 `yaml:"PROPORTIONAL_SLASHING_MULTIPLIER_ALTAIR" spec:"true"` // ProportionalSlashingMultiplierAltair for slashing penalties multiplier post Alair hard fork. // Light client MinSyncCommitteeParticipants uint64 `yaml:"MIN_SYNC_COMMITTEE_PARTICIPANTS" spec:"true"` // MinSyncCommitteeParticipants defines the minimum amount of sync committee participants for which the light client acknowledges the signature. // Merge TerminalBlockHash common.Hash `yaml:"TERMINAL_BLOCK_HASH" spec:"true"` // TerminalBlockHash of beacon chain. TerminalBlockHashActivationEpoch types.Epoch `yaml:"TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH" spec:"true"` // TerminalBlockHashActivationEpoch of beacon chain. TerminalTotalDifficulty uint64 `yaml:"TERMINAL_TOTAL_DIFFICULTY" spec:"true"` // TerminalTotalDifficulty is part of the experimental merge spec. This value is type is currently TBD: https://github.com/ethereum/consensus-specs/blob/dev/specs/merge/beacon-chain.md#transition-settings FeeRecipient common.Address // FeeRecipient where the transaction fee goes to. } // InitializeForkSchedule initializes the schedules forks baked into the config. func (b *BeaconChainConfig) InitializeForkSchedule() { // Reset Fork Version Schedule. b.ForkVersionSchedule = map[[4]byte]types.Epoch{} // Set Genesis fork data. b.ForkVersionSchedule[bytesutil.ToBytes4(b.GenesisForkVersion)] = b.GenesisEpoch // Set Altair fork data. b.ForkVersionSchedule[bytesutil.ToBytes4(b.AltairForkVersion)] = b.AltairForkEpoch }