# eth\_getUncleByBlockHashAndIndex

Returns information about a uncle of a block by hash and uncle index position.

This method will use `20` [Compute Units](../../about/billing).

***

## Reference: [Here](https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_getunclebyblockhashandindex)

## **Parameters**

1. `DATA`, 32 Bytes - The hash of a block.
2. `QUANTITY` - The uncle's index position.

```json
params: [
  "0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b",
  "0x0", // 0
]
```

## Returns:

`Object` - A block object, or `null` when no block was found:

* `number`: `QUANTITY` - the block number. `null` when its pending block.
* `hash`: `DATA`, 32 Bytes - hash of the block. `null` when its pending block.
* `parentHash`: `DATA`, 32 Bytes - hash of the parent block.
* `nonce`: `DATA`, 8 Bytes - hash of the generated proof-of-work. `null` when its pending block.
* `sha3Uncles`: `DATA`, 32 Bytes - SHA3 of the uncles data in the block.
* `logsBloom`: `DATA`, 256 Bytes - the bloom filter for the logs of the block. `null` when its pending block.
* `transactionsRoot`: `DATA`, 32 Bytes - the root of the transaction trie of the block.
* `stateRoot`: `DATA`, 32 Bytes - the root of the final state trie of the block.
* `receiptsRoot`: `DATA`, 32 Bytes - the root of the receipts trie of the block.
* `miner`: `DATA`, 20 Bytes - the address of the beneficiary to whom the mining rewards were given.
* `difficulty`: `QUANTITY` - integer of the difficulty for this block.
* `totalDifficulty`: `QUANTITY` - integer of the total difficulty of the chain until this block.
* `extraData`: `DATA` - the "extra data" field of this block.
* `size`: `QUANTITY` - integer the size of this block in bytes.
* `gasLimit`: `QUANTITY` - the maximum gas allowed in this block.
* `gasUsed`: `QUANTITY` - the total used gas by all transactions in this block.
* `timestamp`: `QUANTITY` - the unix timestamp for when the block was collated.
* `transactions`: `Array` - Array of transaction objects, or 32 Bytes transaction hashes depending on the last given parameter.
* `uncles`: `Array` - Array of uncle hashes.

{% tabs %}
{% tab title="mainnet" %}
```bash
curl https://mainnet.avalanche.validationcloud.io/v1/<YOUR_API_KEY_HERE>/ext/bc/C/rpc \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getUncleByBlockHashAndIndex","params":["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"],"id":1}'

```
{% endtab %}

{% tab title="testnet" %}
```bash
curl https://fuji.avalanche.validationcloud.io/v1/<YOUR_API_KEY_HERE>/ext/bc/C/rpc \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc":"2.0","method":"eth_getUncleByBlockHashAndIndex","params":["0xc6ef2fc5426d6ad6fd9e2a26abeab0aa2411b7ab17f30a99d3cb96aed1d1055b", "0x0"],"id":1}'
```
{% endtab %}
{% endtabs %}

