> For a complete page index, fetch https://docs.conduit.xyz/llms.txt

# eth_getUncleByBlockNumberAndIndex

POST https://rpc.plume.org/YOUR_API_KEY
Content-Type: application/json

Returns information about an uncle block by block number and uncle index position. Post-Merge note: Ethereum no longer produces uncle blocks since the Merge (September 2022). This method will always return null on Conduit chains and is retained for backwards compatibility only.

⚡ Compute Units: [10 CU](https://docs.conduit.xyz/rpc-nodes/information/compute-units)

Reference: https://docs.conduit.xyz/rpc-nodes/json-rpc-reference/eth-get-uncle-by-block-number-and-index

## Request

### Body (application/json)

This endpoint expects an object.

- `blockIdentifier` (BlockNumberOrTag, required) — Block number, or one of "latest", "earliest", "pending", "finalized", "safe"
- `uncleIndex` (string, required) — Integer of the uncle index position

## Response

### 200

Uncle block object, or null if the uncle doesn't exist

- `parentHash` (string, required) — 32-byte hash of the parent block
- `nonce` (string, required) — 8-byte value used in proof-of-work mining. On post-Merge chains (all Conduit rollups) this is always `"0x0000000000000000"` — the field is retained for header-shape backwards compatibility.
- `sha3Uncles` (string, required) — SHA3 of the uncles data in the block
- `logsBloom` (string, required) — Bloom filter for the logs of the block
- `transactionsRoot` (string, required) — Root of the transaction trie
- `stateRoot` (string, required) — Root of the final state trie
- `receiptsRoot` (string, required) — Root of the receipts trie
- `mixHash` (string, required) — 32-byte hash. Post-Merge this field carries the prevRandao value (the beacon chain randomness) rather than a proof-of-work mix hash.
- `miner` (string, required) — 20-byte address of the beneficiary
- `difficulty` (string, required) — Integer of the difficulty for this block
- `extraData` (string, required) — Extra data field of this block
- `size` (string, required) — Integer the size of this block in bytes
- `gasLimit` (string, required) — Maximum gas allowed in this block
- `gasUsed` (string, required) — Total gas used by all transactions in this block
- `timestamp` (string, required) — Unix timestamp for when the block was collated
- `transactions` (BlockTransactions, required) — Array of transaction objects or hashes
- `uncles` (list of string, required) — Array of uncle hashes. Always empty on post-Merge chains (including all Conduit rollups), which no longer produce uncle blocks.
- `number` (string, optional) — The block number, hex-encoded
- `hash` (string, optional) — 32-byte block hash
- `totalDifficulty` (string, optional) — Integer of the total difficulty of the chain until this block
- `baseFeePerGas` (string, optional) — Base fee per gas in wei, hex-encoded. Introduced by EIP-1559 (London). Absent on pre-London blocks.
- `withdrawals` (list of Withdrawal, optional) — Array of validator withdrawal objects. Introduced by EIP-4895 (Shanghai). Absent on pre-Shanghai blocks.
- `withdrawalsRoot` (string, optional) — Root of the withdrawals trie. Introduced by EIP-4895 (Shanghai). Absent on pre-Shanghai blocks.
- `blobGasUsed` (string, optional) — Total blob gas used by the transactions in this block, hex-encoded. Introduced by EIP-4844 (Cancun). Absent on pre-Cancun blocks.
- `excessBlobGas` (string, optional) — Running total of blob gas consumed in excess of the target, used to compute the blob gas price, hex-encoded. Introduced by EIP-4844 (Cancun). Absent on pre-Cancun blocks.
- `parentBeaconBlockRoot` (string, optional) — Parent beacon block root hash. Introduced by EIP-4788 (Cancun). Absent on pre-Cancun blocks.

## Types

### BlockNumberOrTag

### BlockTransactions

Array of transaction objects or hashes

### Withdrawal

A validator withdrawal object, as introduced by EIP-4895 (Shanghai)

- `index` (string, required) — Monotonically increasing withdrawal index, hex-encoded
- `validatorIndex` (string, required) — Index of the validator that generated the withdrawal, hex-encoded
- `address` (string, required) — 20-byte recipient address for the withdrawn ether
- `amount` (string, required) — Withdrawal amount in gwei, hex-encoded

## Examples

**Request**

```json
[
  "latest",
  "0x0"
]
```

**SDK Code**

```python
import requests

url = "https://rpc.plume.org/YOUR_API_KEY"

payload = ["latest", "0x0"]
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://rpc.plume.org/YOUR_API_KEY';
const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: '["latest","0x0"]'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://rpc.plume.org/YOUR_API_KEY"

	payload := strings.NewReader("[\n  \"latest\",\n  \"0x0\"\n]")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://rpc.plume.org/YOUR_API_KEY")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "[\n  \"latest\",\n  \"0x0\"\n]"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://rpc.plume.org/YOUR_API_KEY")
  .header("Content-Type", "application/json")
  .body("[\n  \"latest\",\n  \"0x0\"\n]")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://rpc.plume.org/YOUR_API_KEY', [
  'body' => '[
  "latest",
  "0x0"
]',
  'headers' => [
    'Content-Type' => 'application/json',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://rpc.plume.org/YOUR_API_KEY");
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "[\n  \"latest\",\n  \"0x0\"\n]", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = ["Content-Type": "application/json"]
let parameters = ["latest", "0x0"] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://rpc.plume.org/YOUR_API_KEY")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```