Get state finality checkpoints
Returns finality checkpoints for state with given 'stateId'. In case finality is not yet achieved, checkpoint should return epoch 0 and ZERO_HASH as root.
State identifier. Can be one of: "head" (canonical head in node's view), "genesis", "finalized", "justified", <slot>, <hex encoded stateRoot with 0x prefix>.
Success
True if the response references an unverified execution payload. Optimistic information may be invalidated at a later time. If the field is not present, assume the False value.