Method: channels.deleteParticipantHistory

Delete all messages sent by a specific participant of a given supergroup

Parameters:

Name	Type	Description	Required
channel	Username, chat ID, Update, Message or InputChannel	Supergroup	Optional
participant	Username, chat ID, Update, Message or InputPeer	The participant whose messages should be deleted	Optional

Return type: messages.AffectedHistory

Can userbots use this method: YES

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();

$messages_AffectedHistory = $MadelineProto->channels->deleteParticipantHistory(channel: $InputChannel, participant: $InputPeer, );