# EraEnd

Data attached to a **switch block** - the last finalized block of an era - marking the end of that era. Contains equivocators, inactive validators, seigniorage rewards, and the validator weights for the next era. Only present on switch blocks; `block.eraEnd` is `null` for all other blocks.

## Import

```ts
import { EraEnd, EraReport, EraReward, EraEndV1, EraEndV2 } from 'casper-js-sdk';
```

## Classes

### `EraEnd`

Unified era-end data, normalizing V1 and V2 formats.

| Property | Type | Description |
|---|---|---|
| `equivocators` | `PublicKey[]` | Validators caught double-signing |
| `inactiveValidators` | `PublicKey[]` | Validators that were inactive this era |
| `nextEraValidatorWeights` | `ValidatorWeightEraEnd[]` | Validator weights for the next era |
| `rewards` | `Map<string, CLValueUInt512[]>` | Seigniorage rewards map (validator hex → mote amounts). Includes both validator and delegator shares. |
| `nextEraGasPrice` | `number` | Gas price for the next era |

#### Static Methods

```ts
EraEnd.fromV1(v1: EraEndV1): EraEnd
EraEnd.fromV2(v2: EraEndV2): EraEnd
```

### `EraReport`

Era report (V1 only) containing equivocators, inactive validators, and rewards.

| Property | Type | Description |
|---|---|---|
| `equivocators` | `PublicKey[]` | Double-signing validators |
| `inactiveValidators` | `PublicKey[]` | Inactive validators |
| `rewards` | `EraReward[]` | Per-validator rewards |

### `EraReward`

A single validator reward entry.

| Property | Type | Description |
|---|---|---|
| `validator` | `PublicKey` | Validator's public key |
| `amount` | `CLValueUInt512` | Reward amount in motes |

#### Constructor

```ts
new EraReward(validator: PublicKey, amount: CLValueUInt512)
```

## Usage

```ts
import { RpcClient, HttpHandler } from 'casper-js-sdk';

const client = new RpcClient(new HttpHandler('http://node:7777/rpc'));
const { block } = await client.getLatestBlock();

if (block.eraEnd) {
  const eraEnd = block.eraEnd;
  console.log('Era ended!');
  console.log('Equivocators:', eraEnd.equivocators.length);
  console.log('Inactive validators:', eraEnd.inactiveValidators.length);
  console.log('Next era validators:', eraEnd.nextEraValidatorWeights.length);
  console.log('Next era gas price:', eraEnd.nextEraGasPrice);

  for (const [validator, amounts] of eraEnd.rewards) {
    console.log(`${validator}: ${amounts.map(a => a.toString()).join(', ')}`);
  }
}
```

## See Also

- [`Block`](/types/block) - Block containing optional `EraEnd`
- [`EraInfo`](/types/era-info) - Era seigniorage allocation info
- [`EraSummary`](/types/era-summary) - Era summary from RPC