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# eth_getFilterChanges

# `eth_getFilterChanges`

Polls a filter for new data since the last poll. For log filters, returns new logs. For block filters, returns new block hashes.

## Parameters

-   `filterId`: _[required]_ The filter ID returned by [`eth_newFilter`](/api/reference/eth-newfilter) or [`eth_newBlockFilter`](/api/reference/eth-newblockfilter).

## Returns

Array of log objects (for log filters) or block hashes (for block filters). Returns an empty array if nothing has changed since the last poll.

## Example

### Request

```bash
curl https://rpc.linea.build \
  -X POST \
  -H "Content-Type: application/json" \
  -d '{
    "jsonrpc": "2.0",
    "method": "eth_getFilterChanges",
    "params": ["0x10ff687202f305efab..."],
    "id": 1
  }'
```

### Response

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": []
}
```