Past reward history in polkadot.js

Question

api.query.staking.erasRewardPoints(era) query returns reward history for selected era.

And only last 84 eras reward history is available.

I want to get reward history from first era.

How can I get reward history for all eras?

Answer 1

As discussed you'll need to use api.at with a block hash of an earlier block to continue searching beyond the history depth.