Implement a web-backend that fetches storage keys dynamically from a live chain
- lock on a specific block (latest or user provided)
- provide "genesis" info about which keys are wanted - fetch them at start-up
- allow to override keys and use local provided once
- also via use-once, or for next fetch use this
- fetch keys if externatlities query them from locked block
Implement a web-backend that fetches storage keys dynamically from a live chain