eth2

type BeaconState interface {
	GetSlot() uint64
	ValidatorProof(index uint64) ([][]byte, error)
	HistoricalSummaryProof(slot uint64) ([][]byte, error)
	HistoricalSummaryBlockRootProof(slot int) ([][]byte, error)
	BlockRootProof(slot uint64) ([][]byte, error)
	GetValidators() []*generic.Validator
}

type SignedBeaconBlock interface {
	ProveWithdrawal(indexInWithdrawalsArray uint64) ([][]byte, error)
	HasExecutionPayload() bool
	Withdrawals() []*generic.Withdrawal
}