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

# Filter

> **注意**: 此页面尚未翻译成中文。以下内容为英文原版。

A **Filter** allows searching a specific range of blocks for mathcing logs.

## Extends

* [`EventFilter`](/cn/sdk/content/interfaces/EventFilter)

## Properties

| Property     | Type                                                | Description                                 |
| :----------- | :-------------------------------------------------- | :------------------------------------------ |
| `fromBlock?` | [`BlockTag`](/cn/sdk/content/type-aliases/BlockTag) | The start block for the filter (inclusive). |
| `toBlock?`   | [`BlockTag`](/cn/sdk/content/type-aliases/BlockTag) | The end block for the filter (inclusive).   |