CallOnceOnNoError returns a new function that wraps the given function f with caching capabilities.

LazyFetch caches the results during the first call and then returns the cached value on each consecutive call.

CleanupInterval defines how often roots cache is scanned to evict stale roots.

EvictionGracePeriod defines how long after the messageVisibilityInterval a root is still kept in the cache.

LogpollerEventsBased IMPORTANT: Cache refresh relies on the events that are finalized.

ChainHealthcheck checks the health of the both source and destination chain.