# 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
force Bool Set to true to skip some possibly unneeded updates and reduce server-side load Optional
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

# 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');

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

Or, if you’re into Lua:

updates_ChannelDifference = updates.getChannelDifference({force=Bool, 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
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