Method: messages.setChatAvailableReactions

Change the set of message reactions » that can be used in a certain group, supergroup or channel

Parameters:

Name	Type	Description	Required
peer	Username, chat ID, Update, Message or InputPeer	Group where to apply changes	Optional
available_reactions	ChatReactions	Allowed reaction emojis	Yes

Return type: Updates

Can bots use this method: NO

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 = $MadelineProto->messages->setChatAvailableReactions(peer: $InputPeer, available_reactions: $ChatReactions, );