MadelineProtoDocs/old_docs/API_docs_v9/methods/updates.getChannelDifference.md

title	description	image	redirect_from
updates.getChannelDifference	Returns the difference between the current state of updates of a certain channel and transmitted.	https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png	/API_docs/methods/updates_getChannelDifference.html

Method: updates.getChannelDifference

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Returns the difference between the current state of updates of a certain channel and transmitted.

Parameters:

Name	Type	Description	Required
channel	Username, chat ID, Update, Message or InputChannel	The channel	Optional
filter	ChannelMessagesFilter	Messsage filter	Optional
pts	int	Persistent timestamp (see updates)	Yes
limit	int	How many updates to fetch, max 100000 Ordinary (non-bot) users are supposed to pass 10-100	Yes

Return type: updates.ChannelDifference

Can bots use this method: YES

MadelineProto Example (now async for huge speed and parallelism!):

if (!file_exists('madeline.php')) {
    copy('https://phar.madelineproto.xyz/madeline.php', 'madeline.php');
}
include 'madeline.php';

$MadelineProto = new \danog\MadelineProto\API('session.madeline');
$MadelineProto->start();

$updates.ChannelDifference = $MadelineProto->updates->getChannelDifference(['channel' => InputChannel, 'filter' => ChannelMessagesFilter, 'pts' => int, 'limit' => int, ]);

Or, if you're into Lua:

updates.ChannelDifference = updates.getChannelDifference({channel=InputChannel, filter=ChannelMessagesFilter, pts=int, limit=int, })

Errors

Code	Type	Description
400	CHANNEL_INVALID	The provided channel is invalid
400	CHANNEL_PRIVATE	You haven't joined this channel/supergroup
400	FROM_MESSAGE_BOT_DISABLED	Bots can't use fromMessage min constructors
400	MSG_ID_INVALID	Invalid message ID provided
400	PERSISTENT_TIMESTAMP_EMPTY	Persistent timestamp empty
400	PERSISTENT_TIMESTAMP_INVALID	Persistent timestamp invalid
400	PINNED_DIALOGS_TOO_MUCH	Too many pinned dialogs
400	RANGES_INVALID	Invalid range provided
406	AUTH_KEY_DUPLICATED	An auth key with the same ID was already generated
403	CHANNEL_PUBLIC_GROUP_NA	channel/supergroup not available
-500	No workers running	Internal error
-504	memory limit exit	Internal error
-503	Timeout	Timeout while fetching data