# Functions
IsOptimistic checks whether the beacon state's block is optimistic.
PrepareStateFetchGRPCError returns an appropriate gRPC error based on the supplied argument.
ValidatorStatus returns a validator's status at the given epoch.
ValidatorSubStatus returns a validator's sub-status at the given epoch.
# Structs
IndexedVerificationFailure represents a collection of verification failures.
SingleIndexedVerificationFailure represents an issue when verifying a single indexed object e.g.