This is a naive implementation of the overlay worker.
Future improvements / to dos:
- Walk through the cache and remove nodes that don't respond
- Better look ups for new nodes
- Better random ID generation
- Kademlia hooks for automatically adding new nodes to the cache
* adding refresh cache functionality, added schedule function
* update put in db
* Tests passing
* wip overlay tests for cache refresh
* update scheduler code
* update refresh function
* WIP adding random lookups to refresh worker
* remove quit channel
* updates fire on schedule and the refresh function finds near nodes
* updates to refresh function, getting more buckets and nodes
* updates to refresh function and cache operations
* add cancellation to context, fix k number of nodes in lookups
4c6d359473