# chain_getFinalizedHead

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

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

Returns the block hash of the most recently finalized block in the canonical chain.

Reference: https://www.alchemy.com/docs/chains/astar/astar-api-endpoints/chain-get-finalized-head

## Result

**BlockHash** (string): The hash of the last finalized block.

## Code Examples

### cURL

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

### JavaScript

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

fetch('https://astar-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://astar-mainnet.g.alchemy.com/v2/docs-demo"

payload = {
    "jsonrpc": "2.0",
    "id": 1,
    "method": "chain_getFinalizedHead"
}
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://astar-mainnet.g.alchemy.com/v2/docs-demo"

	payload := strings.NewReader("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"chain_getFinalizedHead\"\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://astar-mainnet.g.alchemy.com/v2/docs-demo")
  .header("Content-Type", "application/json")
  .body("{\n  \"jsonrpc\": \"2.0\",\n  \"id\": 1,\n  \"method\": \"chain_getFinalizedHead\"\n}")
  .asString();
```

### C#

```csharp
using RestSharp;


var options = new RestClientOptions("https://astar-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\": \"chain_getFinalizedHead\"\n}", false);
var response = await client.PostAsync(request);

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

```


## OpenRPC Method Specification

```yaml
name: chain_getFinalizedHead
summary: Get hash of the last finalized block
description: Returns the block hash of the most recently finalized block in the canonical chain.
x-compute-units: 10
params: []
result:
  name: BlockHash
  description: The hash of the last finalized block.
  schema:
    type: string
    example: '0xf0b30ecdc94c481ca96237d2a17408fef6c401f705a1f5f911e58d2a1f33fcb6'
```