JS Client - typed fetch?

[fedorerd]

Default kit methods fetchMaybeRecord / fetchRecord decode base account layout - which is version + authority and also crop out remaining data. So regardless if I store any data I will get only version and authority from default fetch methods. Which is slightly inconvenient, since forces to use rpc.getAccountInfo instead of package methods in most cases.

I wonder if that would make sense to actually add custom fetch methods, which will accept optional data layout from user and will always return remaining data.

So, something like that:

    // user can specify his data layout
    fetchRecordDataExtended(rpc, addressWithSeed, [
        ['value', getU64Decoder({ endian: Endian.Little })]
    ])

This function will fetch account info, try decode first 33 bytes into RecordData, then take remaining bytes and try decode them with user provided layout. And also return remaining data (so if user's layout was 8 bytes, but total account space was 65 bytes, remaining 24 bytes will be also returned)

    // or just fetch without specifying anything
    fetchRecordDataExtended(rpc, addressWithSeed)

If user didn't specify layout at all - we just return remaining bytes.

so the return type will be something like:

type RecordDataExtended<T> = RecordData & T & { remainingData?: Uint8Array }