> For the complete documentation index, see [llms.txt](https://docs.blockpi.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blockpi.io/build/api-reference/0g/eth_newblockfilter.md).

# eth\_newBlockFilter

Creates a filter in the node, to notify when a new block arrives. To check if the state has changed, call eth\_getFilterChanges.

#### **Parameters:**

None

#### **Returns:**

**QUANTITY** - A filter id.

#### Example:

{% code overflow="wrap" %}

```json
// Request
curl https://0g-galileo.blockpi.network/v1/rpc/your-rpc-key -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_newBlockFilter","params":[],"id":1}'

// Result
{
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0xcb13319001066be7c166d2b6327b0932"
}
```

{% endcode %}