false, 'error' => 'Parámetros faltantes: to, message_id, emoji']); exit; } try { $wa = new WhatsAppService(); $result = $wa->sendReaction($to, $message_id, $emoji, $dry); echo json_encode(['success' => true, 'dry_run' => $dry, 'result' => $result]); } catch (Throwable $t) { http_response_code(500); echo json_encode(['success' => false, 'error' => $t->getMessage()]); }