state

Documentation

Overview

Package state defines the actual beacon state interface used by a Prysm beacon node, also containing useful, scoped interfaces such as a ReadOnlyState and WriteOnlyBeaconState.

Index

• Variables
• type BeaconState
• type FutureForkStub
• type ReadOnlyAttestations
• type ReadOnlyBalances
• type ReadOnlyBeaconState
• type ReadOnlyBlockRoots
• type ReadOnlyCheckpoint
• type ReadOnlyEth1Data
• type ReadOnlyRandaoMixes
• type ReadOnlyStateRoots
• type ReadOnlyValidator
• type ReadOnlyValidators
• type ReadOnlyWithdrawals
• type SpecParametersProvider
• type StateProver
• type WriteOnlyAttestations
• type WriteOnlyBalances
• type WriteOnlyBeaconState
• type WriteOnlyBlockRoots
• type WriteOnlyCheckpoint
• type WriteOnlyEth1Data
• type WriteOnlyRandaoMixes
• type WriteOnlyStateRoots
• type WriteOnlyValidators

Variables

var (
	// ErrNilValidatorsInState returns when accessing validators in the state while the state has a
	// nil slice for the validators field.
	ErrNilValidatorsInState = errors.New("state has nil validator slice")
)

var (
	StateCount = promauto.NewGauge(prometheus.GaugeOpts{
		Name: "beacon_state_count",
		Help: "Count the number of active beacon state objects.",
	})
)

Types

type BeaconState

type BeaconState interface {
	SpecParametersProvider
	ReadOnlyBeaconState
	ReadOnlyWithdrawals
	WriteOnlyBeaconState
	Copy() BeaconState
	HashTreeRoot(ctx context.Context) ([32]byte, error)
	FutureForkStub
	StateProver
}

BeaconState has read and write access to beacon state methods.

type FutureForkStub

type FutureForkStub interface {
	AppendCurrentParticipationBits(val byte) error
	AppendPreviousParticipationBits(val byte) error
	AppendInactivityScore(s uint64) error
	CurrentEpochParticipation() ([]byte, error)
	PreviousEpochParticipation() ([]byte, error)
	UnrealizedCheckpointBalances() (uint64, uint64, uint64, error)
	InactivityScores() ([]uint64, error)
	SetInactivityScores(val []uint64) error
	CurrentSyncCommittee() (*ethpb.SyncCommittee, error)
	SetCurrentSyncCommittee(val *ethpb.SyncCommittee) error
	SetPreviousParticipationBits(val []byte) error
	SetCurrentParticipationBits(val []byte) error
	ModifyCurrentParticipationBits(func(val []byte) ([]byte, error)) error
	ModifyPreviousParticipationBits(func(val []byte) ([]byte, error)) error
	NextSyncCommittee() (*ethpb.SyncCommittee, error)
	SetNextSyncCommittee(val *ethpb.SyncCommittee) error
}

FutureForkStub defines methods that are used for future forks. This is a low cost solution to enable various state casting of interface to work.

type ReadOnlyAttestations

type ReadOnlyAttestations interface {
	PreviousEpochAttestations() ([]*ethpb.PendingAttestation, error)
	CurrentEpochAttestations() ([]*ethpb.PendingAttestation, error)
}

ReadOnlyAttestations defines a struct which only has read access to attestations methods.

type ReadOnlyBalances

type ReadOnlyBalances interface {
	Balances() []uint64
	BalanceAtIndex(idx types.ValidatorIndex) (uint64, error)
	BalancesLength() int
}

ReadOnlyBalances defines a struct which only has read access to balances methods.

type ReadOnlyBeaconState

type ReadOnlyBeaconState interface {
	ReadOnlyBlockRoots
	ReadOnlyStateRoots
	ReadOnlyRandaoMixes
	ReadOnlyEth1Data
	ReadOnlyValidators
	ReadOnlyBalances
	ReadOnlyCheckpoint
	ReadOnlyAttestations
	ToProtoUnsafe() interface{}
	ToProto() interface{}
	GenesisTime() uint64
	GenesisValidatorsRoot() []byte
	Slot() types.Slot
	Fork() *ethpb.Fork
	LatestBlockHeader() *ethpb.BeaconBlockHeader
	HistoricalRoots() [][]byte
	Slashings() []uint64
	FieldReferencesCount() map[string]uint64
	MarshalSSZ() ([]byte, error)
	IsNil() bool
	Version() int
	LatestExecutionPayloadHeader() (interfaces.ExecutionData, error)
}

ReadOnlyBeaconState defines a struct which only has read access to beacon state methods.

type ReadOnlyBlockRoots

type ReadOnlyBlockRoots interface {
	BlockRoots() [][]byte
	BlockRootAtIndex(idx uint64) ([]byte, error)
}

ReadOnlyBlockRoots defines a struct which only has read access to block roots methods.

type ReadOnlyCheckpoint

type ReadOnlyCheckpoint interface {
	PreviousJustifiedCheckpoint() *ethpb.Checkpoint
	CurrentJustifiedCheckpoint() *ethpb.Checkpoint
	MatchCurrentJustifiedCheckpoint(c *ethpb.Checkpoint) bool
	MatchPreviousJustifiedCheckpoint(c *ethpb.Checkpoint) bool
	FinalizedCheckpoint() *ethpb.Checkpoint
	FinalizedCheckpointEpoch() types.Epoch
	JustificationBits() bitfield.Bitvector4
}

ReadOnlyCheckpoint defines a struct which only has read access to checkpoint methods.

type ReadOnlyEth1Data

type ReadOnlyEth1Data interface {
	Eth1Data() *ethpb.Eth1Data
	Eth1DataVotes() []*ethpb.Eth1Data
	Eth1DepositIndex() uint64
}

ReadOnlyEth1Data defines a struct which only has read access to eth1 data methods.

type ReadOnlyRandaoMixes

type ReadOnlyRandaoMixes interface {
	RandaoMixes() [][]byte
	RandaoMixAtIndex(idx uint64) ([]byte, error)
	RandaoMixesLength() int
}

ReadOnlyRandaoMixes defines a struct which only has read access to randao mixes methods.

type ReadOnlyStateRoots

type ReadOnlyStateRoots interface {
	StateRoots() [][]byte
	StateRootAtIndex(idx uint64) ([]byte, error)
}

ReadOnlyStateRoots defines a struct which only has read access to state roots methods.

type ReadOnlyValidator

type ReadOnlyValidator interface {
	EffectiveBalance() uint64
	ActivationEligibilityEpoch() types.Epoch
	ActivationEpoch() types.Epoch
	WithdrawableEpoch() types.Epoch
	ExitEpoch() types.Epoch
	PublicKey() [fieldparams.BLSPubkeyLength]byte
	WithdrawalCredentials() []byte
	HasETH1WithdrawalCredential() bool
	IsFullyWithdrawable(types.Epoch) bool
	IsPartiallyWithdrawable(uint64) bool
	Slashed() bool
	IsNil() bool
}

ReadOnlyValidator defines a struct which only has read access to validator methods.

type ReadOnlyValidators

type ReadOnlyValidators interface {
	Validators() []*ethpb.Validator
	ValidatorAtIndex(idx types.ValidatorIndex) (*ethpb.Validator, error)
	ValidatorAtIndexReadOnly(idx types.ValidatorIndex) (ReadOnlyValidator, error)
	ValidatorIndexByPubkey(key [fieldparams.BLSPubkeyLength]byte) (types.ValidatorIndex, bool)
	PubkeyAtIndex(idx types.ValidatorIndex) [fieldparams.BLSPubkeyLength]byte
	NumValidators() int
	ReadFromEveryValidator(f func(idx int, val ReadOnlyValidator) error) error
}

ReadOnlyValidators defines a struct which only has read access to validators methods.

type ReadOnlyWithdrawals

type ReadOnlyWithdrawals interface {
	ExpectedWithdrawals() ([]*enginev1.Withdrawal, error)
	NextWithdrawalValidatorIndex() (types.ValidatorIndex, error)
	NextWithdrawalIndex() (uint64, error)
}

ReadOnlyWithdrawals defines a struct which only has read access to withdrawal methods.

type SpecParametersProvider

type SpecParametersProvider interface {
	InactivityPenaltyQuotient() (uint64, error)
	ProportionalSlashingMultiplier() (uint64, error)
}

SpecParametersProvider provides fork-specific configuration parameters as defined in the consensus specification for the beacon chain.

type StateProver

type StateProver interface {
	FinalizedRootProof(ctx context.Context) ([][]byte, error)
	CurrentSyncCommitteeProof(ctx context.Context) ([][]byte, error)
	NextSyncCommitteeProof(ctx context.Context) ([][]byte, error)
}

StateProver defines the ability to create Merkle proofs for beacon state fields.

type WriteOnlyAttestations

type WriteOnlyAttestations interface {
	AppendCurrentEpochAttestations(val *ethpb.PendingAttestation) error
	AppendPreviousEpochAttestations(val *ethpb.PendingAttestation) error
	RotateAttestations() error
}

WriteOnlyAttestations defines a struct which only has write access to attestations methods.

type WriteOnlyBalances

type WriteOnlyBalances interface {
	SetBalances(val []uint64) error
	UpdateBalancesAtIndex(idx types.ValidatorIndex, val uint64) error
	AppendBalance(bal uint64) error
}

WriteOnlyBalances defines a struct which only has write access to balances methods.

type WriteOnlyBeaconState

type WriteOnlyBeaconState interface {
	WriteOnlyBlockRoots
	WriteOnlyStateRoots
	WriteOnlyRandaoMixes
	WriteOnlyEth1Data
	WriteOnlyValidators
	WriteOnlyBalances
	WriteOnlyCheckpoint
	WriteOnlyAttestations
	SetGenesisTime(val uint64) error
	SetGenesisValidatorsRoot(val []byte) error
	SetSlot(val types.Slot) error
	SetFork(val *ethpb.Fork) error
	SetLatestBlockHeader(val *ethpb.BeaconBlockHeader) error
	SetHistoricalRoots(val [][]byte) error
	SetSlashings(val []uint64) error
	UpdateSlashingsAtIndex(idx, val uint64) error
	AppendHistoricalRoots(root [32]byte) error
	SetLatestExecutionPayloadHeader(payload interfaces.ExecutionData) error
	SetNextWithdrawalIndex(i uint64) error
	SetNextWithdrawalValidatorIndex(i types.ValidatorIndex) error
}

WriteOnlyBeaconState defines a struct which only has write access to beacon state methods.

type WriteOnlyBlockRoots

type WriteOnlyBlockRoots interface {
	SetBlockRoots(val [][]byte) error
	UpdateBlockRootAtIndex(idx uint64, blockRoot [32]byte) error
}

WriteOnlyBlockRoots defines a struct which only has write access to block roots methods.

type WriteOnlyCheckpoint

type WriteOnlyCheckpoint interface {
	SetFinalizedCheckpoint(val *ethpb.Checkpoint) error
	SetPreviousJustifiedCheckpoint(val *ethpb.Checkpoint) error
	SetCurrentJustifiedCheckpoint(val *ethpb.Checkpoint) error
	SetJustificationBits(val bitfield.Bitvector4) error
}

WriteOnlyCheckpoint defines a struct which only has write access to check point methods.

type WriteOnlyEth1Data

type WriteOnlyEth1Data interface {
	SetEth1Data(val *ethpb.Eth1Data) error
	SetEth1DataVotes(val []*ethpb.Eth1Data) error
	AppendEth1DataVotes(val *ethpb.Eth1Data) error
	SetEth1DepositIndex(val uint64) error
}

WriteOnlyEth1Data defines a struct which only has write access to eth1 data methods.

type WriteOnlyRandaoMixes

type WriteOnlyRandaoMixes interface {
	SetRandaoMixes(val [][]byte) error
	UpdateRandaoMixesAtIndex(idx uint64, val []byte) error
}

WriteOnlyRandaoMixes defines a struct which only has write access to randao mixes methods.

type WriteOnlyStateRoots

type WriteOnlyStateRoots interface {
	SetStateRoots(val [][]byte) error
	UpdateStateRootAtIndex(idx uint64, stateRoot [32]byte) error
}

WriteOnlyStateRoots defines a struct which only has write access to state roots methods.

type WriteOnlyValidators

type WriteOnlyValidators interface {
	SetValidators(val []*ethpb.Validator) error
	ApplyToEveryValidator(f func(idx int, val *ethpb.Validator) (bool, *ethpb.Validator, error)) error
	UpdateValidatorAtIndex(idx types.ValidatorIndex, val *ethpb.Validator) error
	AppendValidator(val *ethpb.Validator) error
}

WriteOnlyValidators defines a struct which only has write access to validators methods.