# getblockhash

Returns hash of block in best-block-chain at height provided.

This method will use `10` [Compute Units](https://docs.validationcloud.io/v1/about/billing).

***

## **Reference:** [**Here**](https://developer.bitcoin.org/reference/rpc/getblockhash.html)

## **Parameters**

**`height`** - numeric, required

The height index

## Returns

| Name | Type   | Description    |
| ---- | ------ | -------------- |
| hex  | string | The block hash |

{% tabs %}
{% tab title="mainnet" %}

```bash
curl https://mainnet.bitcoin.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
 -X POST \
 -H "Content-Type: application/json" \
 -d '{
	"jsonrpc": "1.0",
	"id": "curltest",
	"method": "getblockhash",
	"params": [1000]
}'
```

{% endtab %}

{% tab title="testnet" %}

```bash
curl https://testnet.bitcoin.validationcloud.io/v1/<YOUR_API_KEY_HERE> \
 -X POST \
 -H "Content-Type: application/json" \
 -d '{
	"jsonrpc": "1.0",
	"id": "curltest",
	"method": "getblockhash",
	"params": [1000]
}'
```

{% endtab %}
{% endtabs %}