# getEraInfoByBlockHash

Returns the era info at a specific block, identified by block hash.

## Import

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

## Usage

```ts
const result = await rpcClient.getEraInfoByBlockHash('abc123...');

if (result.eraSummary) {
  console.log('Era ID:', result.eraSummary.eraId);
}
```

## Parameters

### hash

- **Type:** `string`

Block hash as a hex string.

## Return Value

`Promise<ChainGetEraInfoResult>`

```ts
interface ChainGetEraInfoResult {
  eraSummary?: EraSummary;
}
```

:::note
`eraSummary` is only present in the result if the queried block is a switch block (i.e., the last block of an era).
:::

## Related

- [`getEraInfoLatest`](/actions/auction/getEraInfoLatest)
- [`getEraInfoByBlockHeight`](/actions/auction/getEraInfoByBlockHeight)
- [`getEraSummaryByHash`](/actions/auction/getEraSummaryByHash)