get https://api.zan.top/node/v1/eth/mainnet//eth/v1/beacon/light_client/optimistic_update
Get the latest known LightClientOptimisticUpdate.
Requests the latest LightClientOptimisticUpdate known by the server.
Depending on the Accept header it can be returned either as JSON or SSZ-serialized bytes.
Servers SHOULD provide results as defined in create_light_client_optimistic_update.