# Step

Fires at the end of each era when the auction step executes, distributing rewards and updating validator weights.

## Import

```ts
import { SseClient, EventName } from 'casper-js-sdk';
```

## Usage

```ts
sseClient.subscribe(EventName.StepEventType, (raw) => {
  const result = raw.parseAsStepEvent();
  if (result.err) return;

  const step = result.val.step;
  console.log('Era ID:', step.eraId);
  // step.executionEffect contains all state changes from the era step
});
```

## Payload

### StepPayload

| Field | Type | Description |
|---|---|---|
| `eraId` | `number` | The era that just completed |
| `executionEffect` | `ExecutionEffect` | State changes from reward distribution |

## Notes

- Eras on mainnet are approximately 120 minutes (~440 blocks). The era ends when both the minimum block count and minimum duration thresholds are met.
- The step event includes validator activations/deactivations and reward distributions.
- Subscribe to this event to track staking reward payouts.

## Related

- [`getLatestAuctionInfo`](/actions/auction/getLatestAuctionInfo)
- [`getLatestValidatorReward`](/actions/auction/getLatestValidatorReward)