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interfaces.go
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interfaces.go
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// 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.
package state
import (
"context"
"github.com/prysmaticlabs/go-bitfield"
fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
enginev1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
)
// BeaconState has read and write access to beacon state methods.
type BeaconState interface {
SpecParametersProvider
ReadOnlyBeaconState
WriteOnlyBeaconState
Copy() BeaconState
HashTreeRoot(ctx context.Context) ([32]byte, error)
FutureForkStub
StateProver
}
// SpecParametersProvider provides fork-specific configuration parameters as
// defined in the consensus specification for the beacon chain.
type SpecParametersProvider interface {
InactivityPenaltyQuotient() (uint64, error)
ProportionalSlashingMultiplier() (uint64, error)
}
// StateProver defines the ability to create Merkle proofs for beacon state fields.
type StateProver interface {
FinalizedRootProof(ctx context.Context) ([][]byte, error)
CurrentSyncCommitteeProof(ctx context.Context) ([][]byte, error)
NextSyncCommitteeProof(ctx context.Context) ([][]byte, error)
}
// ReadOnlyBeaconState defines a struct which only has read access to beacon state methods.
type ReadOnlyBeaconState interface {
ReadOnlyBlockRoots
ReadOnlyStateRoots
ReadOnlyRandaoMixes
ReadOnlyEth1Data
ReadOnlyValidators
ReadOnlyBalances
ReadOnlyCheckpoint
ReadOnlyAttestations
InnerStateUnsafe() interface{}
CloneInnerState() 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() (*enginev1.ExecutionPayloadHeader, error)
}
// WriteOnlyBeaconState defines a struct which only has write access to beacon state methods.
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
}
// ReadOnlyValidator defines a struct which only has read access to validator methods.
type ReadOnlyValidator interface {
EffectiveBalance() uint64
ActivationEligibilityEpoch() types.Epoch
ActivationEpoch() types.Epoch
WithdrawableEpoch() types.Epoch
ExitEpoch() types.Epoch
PublicKey() [fieldparams.BLSPubkeyLength]byte
WithdrawalCredentials() []byte
Slashed() bool
IsNil() bool
}
// ReadOnlyValidators defines a struct which only has read access to validators methods.
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
}
// ReadOnlyBalances defines a struct which only has read access to balances methods.
type ReadOnlyBalances interface {
Balances() []uint64
BalanceAtIndex(idx types.ValidatorIndex) (uint64, error)
BalancesLength() int
}
// ReadOnlyCheckpoint defines a struct which only has read access to checkpoint methods.
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
}
// ReadOnlyBlockRoots defines a struct which only has read access to block roots methods.
type ReadOnlyBlockRoots interface {
BlockRoots() [][]byte
BlockRootAtIndex(idx uint64) ([]byte, error)
}
// ReadOnlyStateRoots defines a struct which only has read access to state roots methods.
type ReadOnlyStateRoots interface {
StateRoots() [][]byte
StateRootAtIndex(idx uint64) ([]byte, error)
}
// ReadOnlyRandaoMixes defines a struct which only has read access to randao mixes methods.
type ReadOnlyRandaoMixes interface {
RandaoMixes() [][]byte
RandaoMixAtIndex(idx uint64) ([]byte, error)
RandaoMixesLength() int
}
// ReadOnlyEth1Data defines a struct which only has read access to eth1 data methods.
type ReadOnlyEth1Data interface {
Eth1Data() *ethpb.Eth1Data
Eth1DataVotes() []*ethpb.Eth1Data
Eth1DepositIndex() uint64
}
// ReadOnlyAttestations defines a struct which only has read access to attestations methods.
type ReadOnlyAttestations interface {
PreviousEpochAttestations() ([]*ethpb.PendingAttestation, error)
CurrentEpochAttestations() ([]*ethpb.PendingAttestation, error)
}
// WriteOnlyBlockRoots defines a struct which only has write access to block roots methods.
type WriteOnlyBlockRoots interface {
SetBlockRoots(val [][]byte) error
UpdateBlockRootAtIndex(idx uint64, blockRoot [32]byte) error
}
// WriteOnlyStateRoots defines a struct which only has write access to state roots methods.
type WriteOnlyStateRoots interface {
SetStateRoots(val [][]byte) error
UpdateStateRootAtIndex(idx uint64, stateRoot [32]byte) error
}
// WriteOnlyEth1Data defines a struct which only has write access to eth1 data methods.
type WriteOnlyEth1Data interface {
SetEth1Data(val *ethpb.Eth1Data) error
SetEth1DataVotes(val []*ethpb.Eth1Data) error
AppendEth1DataVotes(val *ethpb.Eth1Data) error
SetEth1DepositIndex(val uint64) error
}
// WriteOnlyValidators defines a struct which only has write access to validators methods.
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
}
// WriteOnlyBalances defines a struct which only has write access to balances methods.
type WriteOnlyBalances interface {
SetBalances(val []uint64) error
UpdateBalancesAtIndex(idx types.ValidatorIndex, val uint64) error
AppendBalance(bal uint64) error
}
// WriteOnlyRandaoMixes defines a struct which only has write access to randao mixes methods.
type WriteOnlyRandaoMixes interface {
SetRandaoMixes(val [][]byte) error
UpdateRandaoMixesAtIndex(idx uint64, val []byte) error
}
// WriteOnlyCheckpoint defines a struct which only has write access to check point methods.
type WriteOnlyCheckpoint interface {
SetFinalizedCheckpoint(val *ethpb.Checkpoint) error
SetPreviousJustifiedCheckpoint(val *ethpb.Checkpoint) error
SetCurrentJustifiedCheckpoint(val *ethpb.Checkpoint) error
SetJustificationBits(val bitfield.Bitvector4) error
}
// WriteOnlyAttestations defines a struct which only has write access to attestations methods.
type WriteOnlyAttestations interface {
AppendCurrentEpochAttestations(val *ethpb.PendingAttestation) error
AppendPreviousEpochAttestations(val *ethpb.PendingAttestation) error
RotateAttestations() 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 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
}