ExternalSender.php

См. документацию.

<?php
 
namespace Bitrix\MessageService\Providers;
 
use Bitrix\MessageService\Sender\Result\HttpRequestResult;
 
interface ExternalSender
{
    public function callExternalMethod(string $method, ?array $requestParams = null, string $httpMethod = ''): HttpRequestResult;
    public function setApiKey(string $apiKey): self;
}