# getDelegatorRewardByBlockHash

Returns the reward earned by a delegator for a specific validator at the era corresponding to a specific block hash.

## Import

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

## Usage

```ts
const validator = PublicKey.fromHex('01a8b1...');
const delegator = PublicKey.fromHex('01c9d2...');

const result = await rpcClient.getDelegatorRewardByBlockHash(
  validator,
  delegator,
  'abc123...'
);

console.log('Delegator reward:', result.delegatorReward.toString());
```

## Parameters

### validator

- **Type:** `PublicKey`

The validator's public key.

### delegator

- **Type:** `PublicKey`

The delegator's public key.

### blockHash

- **Type:** `string`

Block hash as a hex string. The era is determined from this block.

## Return Value

`Promise<InfoGetRewardResult>`

```ts
interface InfoGetRewardResult {
  delegatorReward: BigNumber;
  validatorReward: BigNumber;
}
```

## Related

- [`getLatestDelegatorReward`](/actions/auction/getLatestDelegatorReward)
- [`getDelegatorRewardByEraID`](/actions/auction/getDelegatorRewardByEraID)
- [`getDelegatorRewardByBlockHeight`](/actions/auction/getDelegatorRewardByBlockHeight)