API reference > @kontsedal/olas-core > WriteSource

WriteSource type

What produced a cache write:

• 'fetch' — a fetcher resolved (every page batch, for an infinite query) - 'hydrate' — dehydrated data reached the entry (SSR, a warm start) - 'optimistic' — setData, a guess a mutation may roll back - 'rollback' — an optimistic layer was undone - 'commit' — an optimistic layer was committed as server truth: its snapshot was finalized, as a successful mutation does. It is reported once no optimistic layer on the entry is live, so data holds no pending guess. A commit made while another layer is live is reported by the settle that clears the last one, even when that settle is a rollback, and then in place of the 'rollback'. updatedAt is when the server last answered (fetch, hydrated row or canonical write), since a commit does not restart the stale clock, or 0 when it never did. - 'write' — write, a canonical patch - 'replace' — replace, a canonical whole record

Signature:

type WriteSource = 'fetch' | 'hydrate' | 'optimistic' | 'rollback' | 'commit' | 'write' | 'replace';