# ledger_getHeadL2Block

> For the complete documentation index, see [llms.txt](/docs/llms.txt).

POST https://citrea-mainnet.g.alchemy.com/v2/{apiKey}

Returns the latest (head) L2 block.

Reference: https://www.alchemy.com/docs/chains/citrea/citrea-api-endpoints/ledger-get-head-l-2-block

## Result

**L2 block** (object): Latest L2 block (same structure as ledger_getL2BlockByNumber).

## Example

### Response

```json
{
  "jsonrpc": "2.0",
  "result": {
    "header": {
      "height": "0xf438d",
      "hash": "999528b4d08dc8d0b05cbace0f5e661f36d824cedde1ffa75dc0c197b355c111",
      "prev_hash": "3dd4a535bc994f8f8d7d1f814be99f73dc522aa314905ca9985e479b350f17e7",
      "state_root": "c55d26ed7c1733d6be6283f68ab87db37271bf476008eba5231f5d321e0efe2c",
      "signature": "69f712ea23731ce8432867526084e260d1aeef9290f4c26889361e3bb5e168724bfe328986a56752778a2a93c360b9c291614ce4e15d4b1c2fac7bf31c7068e9",
      "l1_fee_rate": "0x9502f900",
      "timestamp": "0x67089f9c",
      "tx_merkle_root": "13148bcd464a1ef2824f13372513eda01d2f83d498790bf558060dc0bf4cbcbb"
    },
    "txs": [
      "00400000004f3f...0000"
    ]
  },
  "id": 1
}
```

## Code Examples

### cURL

```bash
curl --request POST \
  --url https://citrea-mainnet.g.alchemy.com/v2/docs-demo \
  --header 'Content-Type: application/json' \
  --data '{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "ledger_getHeadL2Block"
}'
```

### JavaScript

```javascript
const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({jsonrpc: '2.0', id: 1, method: 'ledger_getHeadL2Block'})
};

fetch('https://citrea-mainnet.g.alchemy.com/v2/docs-demo', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));
```

### Python

```python
import requests

url = "https://citrea-mainnet.g.alchemy.com/v2/docs-demo"

payload = {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "ledger_getHeadL2Block"
}
headers = {"Content-Type": "application/json"}

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

print(response.text)
```

### Go

```go
package main

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

func main() {

	url := "https://citrea-mainnet.g.alchemy.com/v2/docs-demo"

	payload := strings.NewReader("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"ledger_getHeadL2Block\"\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(string(body))

}
```

### Java

```java
HttpResponse<String> response = Unirest.post("https://citrea-mainnet.g.alchemy.com/v2/docs-demo")
  .header("Content-Type", "application/json")
  .body("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"ledger_getHeadL2Block\"\n}")
  .asString();
```

### C#

```csharp
using RestSharp;


var options = new RestClientOptions("https://citrea-mainnet.g.alchemy.com/v2/docs-demo");
var client = new RestClient(options);
var request = new RestRequest("");
request.AddJsonBody("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"ledger_getHeadL2Block\"\n}", false);
var response = await client.PostAsync(request);

Console.WriteLine("{0}", response.Content);

```


## OpenRPC Method Specification

```yaml
name: ledger_getHeadL2Block
description: Returns the latest (head) L2 block.
params: []
result:
  name: L2 block
  description: Latest L2 block (same structure as ledger_getL2BlockByNumber).
  schema:
    type: object
    required:
      - header
      - txs
    additionalProperties: false
    properties:
      header:
        type: object
        required:
          - height
          - hash
          - prev_hash
          - state_root
          - signature
          - l1_fee_rate
          - timestamp
          - tx_merkle_root
        additionalProperties: false
        properties:
          height:
            type: string
            description: Block height in hex format.
          hash:
            type: string
            description: 32-byte block hash (hex, without 0x).
          prev_hash:
            type: string
            description: Previous block hash (hex, without 0x).
          state_root:
            type: string
            description: State root after this block (hex, without 0x).
          signature:
            type: string
            description: Sequencer signature (hex, without 0x).
          l1_fee_rate:
            type: string
            description: L1 fee rate in hex (0x-prefixed).
          timestamp:
            type: string
            description: Block timestamp in hex (0x-prefixed).
          tx_merkle_root:
            type: string
            description: Merkle root of transactions (hex, without 0x).
      txs:
        type: array
        description: Array of transaction data (hex-encoded).
        items:
          type: string
examples:
  - name: ledger_getHeadL2Block example
    params: []
    result:
      name: L2 block
      value:
        header:
          height: '0xf438d'
          hash: 999528b4d08dc8d0b05cbace0f5e661f36d824cedde1ffa75dc0c197b355c111
          prev_hash: 3dd4a535bc994f8f8d7d1f814be99f73dc522aa314905ca9985e479b350f17e7
          state_root: c55d26ed7c1733d6be6283f68ab87db37271bf476008eba5231f5d321e0efe2c
          signature: 69f712ea23731ce8432867526084e260d1aeef9290f4c26889361e3bb5e168724bfe328986a56752778a2a93c360b9c291614ce4e15d4b1c2fac7bf31c7068e9
          l1_fee_rate: '0x9502f900'
          timestamp: '0x67089f9c'
          tx_merkle_root: 13148bcd464a1ef2824f13372513eda01d2f83d498790bf558060dc0bf4cbcbb
        txs:
          - 00400000004f3f...0000
```