> ## Documentation Index
> Fetch the complete documentation index at: https://voltaire.tevm.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# primitives/BlockFilter

> Auto-generated API documentation

[**@tevm/voltaire**](../index.mdx)

***

[@tevm/voltaire](../index.mdx) / primitives/BlockFilter

# primitives/BlockFilter

## Type Aliases

### BlockFilterType

> **BlockFilterType** = `object` & `object`

Defined in: [src/primitives/BlockFilter/BlockFilterType.ts:10](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/BlockFilter/BlockFilterType.ts#L10)

Block filter created by eth\_newBlockFilter

Notifies of new blocks when polled with eth\_getFilterChanges.
Returns array of block hashes.

#### Type Declaration

##### filterId

> `readonly` **filterId**: [`FilterIdType`](FilterId.mdx#filteridtype)

Filter identifier

##### type

> `readonly` **type**: `"block"`

Filter type discriminator

#### Type Declaration

##### \[brand]

> `readonly` **\[brand]**: `"BlockFilter"`

## Functions

### from()

> **from**(`filterId`): [`BlockFilterType`](#blockfiltertype)

Defined in: [src/primitives/BlockFilter/from.js:13](https://github.com/evmts/voltaire/blob/bd6ec34405c15ad8cd51d11579d495dc53813482/src/primitives/BlockFilter/from.js#L13)

Create BlockFilter from filter ID

#### Parameters

##### filterId

[`FilterIdType`](FilterId.mdx#filteridtype)

Filter identifier from eth\_newBlockFilter

#### Returns

[`BlockFilterType`](#blockfiltertype)

#### Example

```javascript theme={null}
import * as BlockFilter from './primitives/BlockFilter/index.js';
import * as FilterId from './primitives/FilterId/index.js';
const filter = BlockFilter.from(FilterId.from("0x1"));
```