# citrea_getL2StatusHeightsByL1Height

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

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

Returns committed and proven L2 heights as of a given Bitcoin block.

Reference: https://www.alchemy.com/docs/chains/citrea/citrea-api-endpoints/citrea-get-l-2-status-heights-by-l-1-height

## Parameters

| Name | Type | Required | Description |
|------|------|----------|-------------|
| l1_height | integer | Yes | Bitcoin block height to query. |

## Result

**L2 status heights** (object): Committed and proven L2 heights as of the specified L1 block.

## Example

### Request

```json
{
  "jsonrpc": "2.0",
  "method": "citrea_getL2StatusHeightsByL1Height",
  "params": [
    800000
  ],
  "id": 1
}
```

### Response

```json
{
  "jsonrpc": "2.0",
  "result": {
    "committed": {
      "height": 12489007,
      "commitment_index": 3444
    },
    "proven": {
      "height": 11457999,
      "commitment_index": 2401
    }
  },
  "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": "citrea_getL2StatusHeightsByL1Height",
  "params": [
    800000
  ]
}'
```

### JavaScript

```javascript
const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    jsonrpc: '2.0',
    id: 1,
    method: 'citrea_getL2StatusHeightsByL1Height',
    params: [800000]
  })
};

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": "citrea_getL2StatusHeightsByL1Height",
    "params": [800000]
}
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\": \"citrea_getL2StatusHeightsByL1Height\",\n  \"params\": [\n    800000\n  ]\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\": \"citrea_getL2StatusHeightsByL1Height\",\n  \"params\": [\n    800000\n  ]\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\": \"citrea_getL2StatusHeightsByL1Height\",\n  \"params\": [\n    800000\n  ]\n}", false);
var response = await client.PostAsync(request);

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

```


## OpenRPC Method Specification

```yaml
name: citrea_getL2StatusHeightsByL1Height
description: Returns committed and proven L2 heights as of a given Bitcoin block.
params:
  - name: l1_height
    required: true
    description: Bitcoin block height to query.
    schema:
      title: L1BlockHeight
      type: integer
result:
  name: L2 status heights
  description: Committed and proven L2 heights as of the specified L1 block.
  schema:
    type: object
    required:
      - committed
      - proven
    additionalProperties: false
    properties:
      committed:
        type: object
        required:
          - height
          - commitment_index
        additionalProperties: false
        properties:
          height:
            type: integer
            description: Latest committed L2 block height (decimal).
          commitment_index:
            type: integer
            description: Sequencer commitment index (decimal).
      proven:
        type: object
        required:
          - height
          - commitment_index
        additionalProperties: false
        properties:
          height:
            type: integer
            description: Latest proven L2 block height (decimal).
          commitment_index:
            type: integer
            description: Sequencer commitment index (decimal).
examples:
  - name: citrea_getL2StatusHeightsByL1Height example
    params:
      - name: l1_height
        value: 800000
    result:
      name: L2 status heights
      value:
        committed:
          height: 12489007
          commitment_index: 3444
        proven:
          height: 11457999
          commitment_index: 2401
```