> ## Documentation Index
> Fetch the complete documentation index at: https://cometchat-22654f5b-release-flutter-v5-stable.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Implementing Block/Unblock User in Flutter with CometChat UIKit

Enable users to block and unblock other users in your Flutter chat app using CometChat's `blockUsers` and `unblockUsers` methods.

## Overview

The Block User feature lets one user prevent another from sending messages or interacting with them. Essential for user privacy, spam control, and moderation.

## Prerequisites

* A Flutter project with CometChat UIKit Flutter V6 installed
* Initialized CometChat credentials (`appID`, `region`, `authKey`)

## Components

| Component                            | Role                                     |
| :----------------------------------- | :--------------------------------------- |
| `CometChatUIKit.blockUsers([...])`   | SDK method to block specified user(s)    |
| `CometChatUIKit.unblockUsers([...])` | SDK method to unblock specified user(s)  |
| `ElevatedButton`                     | Flutter widget for block/unblock actions |

## Integration Steps

### Add "Block User" Button

<Tabs>
  <Tab title="Dart">
    ```dart theme={null}
    ElevatedButton(
      onPressed: () async {
        try {
          await CometChatUIKit.blockUsers([user.uid]);
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(content: Text('${user.name} has been blocked')),
          );
        } catch (e) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(content: Text('Error blocking user: $e')),
          );
        }
      },
      child: Text('Block User'),
    )
    ```
  </Tab>
</Tabs>

### Add "Unblock User" Button

<Tabs>
  <Tab title="Dart">
    ```dart theme={null}
    ElevatedButton(
      onPressed: () async {
        try {
          await CometChatUIKit.unblockUsers([user.uid]);
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(content: Text('${user.name} has been unblocked')),
          );
        } catch (e) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(content: Text('Error unblocking user: $e')),
          );
        }
      },
      child: Text('Unblock User'),
    )
    ```
  </Tab>
</Tabs>

## Customization Options

* Conditional Rendering: Display "Block" or "Unblock" based on `user.blockedByMe` state
* Modal Confirmation: Wrap actions in `showDialog` for confirmation prompts
* Self-Block Prevention: Disable the button if `user.uid == loggedInUser.uid`

## Summary

| Feature      | Method                               |
| :----------- | :----------------------------------- |
| Block User   | `CometChatUIKit.blockUsers([...])`   |
| Unblock User | `CometChatUIKit.unblockUsers([...])` |