Method: messages.reportReaction

Parameters:

Name	Type	Required
peer	Username, chat ID, Update, Message or InputPeer	Optional
id	int	Yes
reaction_peer	Username, chat ID, Update, Message or InputPeer	Optional

Return type: Bool

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();

// PHP 8+ syntax, use an array on PHP 7.
$Bool = $MadelineProto->messages->reportReaction(peer: InputPeer, id: int, reaction_peer: InputPeer, );