65 lines
2.5 KiB
Markdown
65 lines
2.5 KiB
Markdown
---
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title: updates.getChannelDifference
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description: Returns the difference between the current state of updates of a certain channel and transmitted.
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image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png
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---
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# Method: updates.getChannelDifference
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[Back to methods index](index.md)
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Returns the difference between the current state of updates of a certain channel and transmitted.
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### Parameters:
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| Name | Type | Description | Required |
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|----------|---------------|-------------|----------|
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|channel|[Username, chat ID, Update, Message or InputChannel](../types/InputChannel.md) | The channel | Optional|
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|filter|[ChannelMessagesFilter](../types/ChannelMessagesFilter.md) | Messsage filter | Optional|
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|pts|[int](../types/int.md) | Persistent timestamp (see [updates](https://core.telegram.org/api/updates)) | Yes|
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|limit|[int](../types/int.md) | How many updates to fetch, max `100000`<br>Ordinary (non-bot) users are supposed to pass `10-100` | Yes|
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### Return type: [updates\_ChannelDifference](../types/updates_ChannelDifference.md)
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### Can bots use this method: **YES**
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### MadelineProto Example ([now async for huge speed and parallelism!](https://docs.madelineproto.xyz/docs/ASYNC.html)):
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```php
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if (!file_exists('madeline.php')) {
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copy('https://phar.madelineproto.xyz/madeline.php', 'madeline.php');
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}
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include 'madeline.php';
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$MadelineProto = new \danog\MadelineProto\API('session.madeline');
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$MadelineProto->start();
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$updates_ChannelDifference = $MadelineProto->updates->getChannelDifference(['channel' => InputChannel, 'filter' => ChannelMessagesFilter, 'pts' => int, 'limit' => int, ]);
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```
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Or, if you're into Lua:
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```lua
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updates_ChannelDifference = updates.getChannelDifference({channel=InputChannel, filter=ChannelMessagesFilter, pts=int, limit=int, })
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```
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### Errors
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| Code | Type | Description |
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|------|----------|---------------|
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|400|CHANNEL_INVALID|The provided channel is invalid|
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|400|CHANNEL_PRIVATE|You haven't joined this channel/supergroup|
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|400|FROM_MESSAGE_BOT_DISABLED|Bots can't use fromMessage min constructors|
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|400|MSG_ID_INVALID|Invalid message ID provided|
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|400|PERSISTENT_TIMESTAMP_EMPTY|Persistent timestamp empty|
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|400|PERSISTENT_TIMESTAMP_INVALID|Persistent timestamp invalid|
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|400|PINNED_DIALOGS_TOO_MUCH|Too many pinned dialogs|
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|400|RANGES_INVALID|Invalid range provided|
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|406|AUTH_KEY_DUPLICATED|An auth key with the same ID was already generated|
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|403|CHANNEL_PUBLIC_GROUP_NA|channel/supergroup not available|
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|-503|Timeout|Timeout while fetching data|
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