> For the complete documentation index, see [llms.txt](https://docs.constellationnetwork.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.constellationnetwork.io/stargazer-wallet/ethereum-rpc-api/eth_getunclebyblocknumberandindex.md).

# eth\_getUncleByBlockNumberAndIndex

Returns information about a block's uncle by number and uncle index.

**Parameters**[**​**](https://docs.constellationnetwork.io/stargazer/APIReference/ethereumRPCAPI/eth_getUncleByBlockNumberAndIndex#parameters)

| Name        | Type                                                            | Description                                                                |
| ----------- | --------------------------------------------------------------- | -------------------------------------------------------------------------- |
| BlockNumber | `HexString<Number>`\| `"latest"` \| `"earliest"` \| `"pending"` | Hexadecimal block number, or the string "latest", "earliest" or "pending". |
| UncleIndex  | `HexString<Number>`                                             | Uncle's index position.                                                    |

**Return Type**[**​**](https://docs.constellationnetwork.io/stargazer/APIReference/ethereumRPCAPI/eth_getUncleByBlockNumberAndIndex#return-type)

`UncleBlock` | `null` - The block data or null if not found.

UncleBlock

```
type UncleBlock = {
  number: HexString<Number> | null; // Block number or null if block is pending.
  hash: HexString<Hash> | null; // Block hash or null if block is pending.
  parentHash: HexString<Hash>; // Hash of the parent block.
  nonce: HexString<Hash> | null; // Hash of the proof-of-work or null if block is pending.

  sha3Uncles: HexString<Hash>; // SHA3 hash of the uncles data in the block.
  logsBloom: HexString<FilterBloom> | null; // Bloom filter of the logs in the block or null if block is pending.
  transactionsRoot: HexString<Hash>; // Root hash of the transaction trie of the block.
  stateRoot: HexString<Hash>; // Root hash of the final state trie of the block.
  receiptsRoot: HexString<Hash>; // Root hash of the receipts trie of the block.

  miner: Address; // Miner's address for rewards.
  difficulty: HexString<Number>; // Difficulty for this block.
  totalDifficulty: HexString<Number>; // Total difficulty for the chain until this block.

  extraData: HexString; // 32-byte long space to preserve for the ethernity :]
  gasLimit: HexString<Number>; // Maximum gas allowed for this block.
  gasUsed: HexString<Number>; // Total gas used for all transactions in this block.

  size: HexString<Number>; // Size of this block in bytes.
  timestamp: HexString<Number>; // The unix timestamp for when the block was collated.

  uncles: HexString<Hash>[]; // Array of uncle hashes.
};
```

**Example**[**​**](https://docs.constellationnetwork.io/stargazer/APIReference/ethereumRPCAPI/eth_getUncleByBlockNumberAndIndex#example)

```
await provider.request({
  method: "eth_getUncleByBlockNumberAndIndex",
  params: ["0x29c", "0x0"],
});
/* {
  difficulty: "0xbfabcdbd93dda",
  extraData: "0x737061726b706f6f6c2d636e2d6e6f64652d3132",
  gasLimit: "0x79f39e",
  gasUsed: "0x79ccd3",
  hash: "0xb3b20624f8f0f86eb50dd04688409e5cea4bd02d700bf6e79e9384d47d6a5a35",
  logsBloom:
    "0x4848112002a2020aaa081218004584...",
  miner: "0x5a0b54d5dc17e0aadc383d2db43b0a0d3e029c4c",
  nonce: "0x4db7a1c01d8a8072",
  number: "0x5bad55",
  parentHash:
    "0x61a8ad530a8a43e3583f8ec163f773ad370329b2375d66433eb82f005e1d6202",
  receiptsRoot:
    "0x5eced534b3d84d3d732ddbc714f5fd51d98a941b28182b6efe6df3a0fe90004b",
  sha3Uncles:
    "0x8a562e7634774d3e3a36698ac4915e37fc84a2cd0044cb84fa5d80263d2af4f6",
  size: "0x41c7",
  stateRoot:
    "0xf5208fffa2ba5a3f3a2f64ebd5ca3d098978bedd75f335f56b705d8715ee2305",
  timestamp: "0x5b541449",
  totalDifficulty: "0x12ac11391a2f3872fcd",
  transactionsRoot:
    "0xf98631e290e88f58a46b7032f025969039aa9b5696498efc76baf436fa69b262",
  uncles: []
} */


```


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