Get era and validator address from Rewarded event

Question

I have Staking Rewarded event.

I can get stash address and reward amount from it.

How to use api.events.staking.Rewarded.is to get nominator reward?

How can I get validator address and era from event?

So, I can get know which validator did payout for which era.

Answer 1

You can get the era of that event because you have the block hash where that event occurs:

const at = await api.at(blockHash);
const era = await at.query.staking.activeEra();
console.log(era.toHuman());

If you want the set of validators in that moment:

const validators = await at.query.session.validators();
console.log(validators.toHuman());

If you want to see the list of the rewards for that eras:

const erasValidatorReward = await api.query.staking.erasRewardPoints(numberOfEra);
console.log(erasValidatorReward.toHuman());