Tony Grebnev

### Problem Right now we have address and referrals indexes that are required for block validation and number of rpc methods. We need to make them optional and update validation...

Mutate's async function data is set to `undefined` with `getServerSideProps` and no revalidation

4

# Bug report ## Description / Observed Behavior [Mutate Based on Current Data Docs](https://swr.vercel.app/docs/mutation#mutate-based-on-current-data) `mutate`'s async function data is set to `undefined` when used with Next.js `getServerSideProps` fallback and `revalidateIfStale:...