Transformers xml json for Selling Partner API for PHP

[carnevaleveneziano]

Hi,
i'm using your library Selling Partner API for PHP on github and i read about the passage from xml to json format.
I see that you've created the Transformers library that can convert easily the xml file to json file, but i don't understand than in which way i can send the json file through your selling partner api.
Until now to send xml for inventory data (asin quantity) files i call the library FeedsApi with feedtype POST_INVENTORY_AVAILABILITY_DATA, than i send the xml feed with $feedsApi->createFeed.
With your json transformers i see that the library will create a json file, but than in which way i must send the json to amazon with your sp-api php library?
Greetings

[jlevers]

The process for sending the JSON feed is exactly the same as the process for sending the XML feed – you just replace the feedtype in the call with JSON_LISTINGS_FEED:

// $oldFeedType = 'POST_INVENTORY_AVAILABILITY_DATA';
$feedType = 'JSON_LISTINGS_FEED';

$connector = SellingPartnerApi::seller(/* ... */);
$feedsApi = $connector->feedsV20210630();

// Create feed document
$contentType = CreateFeedDocumentResponse::getContentType($feedType);
$createFeedDoc = new CreateFeedDocumentSpecification($contentType);
$createDocumentResponse = $feedsApi->createFeedDocument($createFeedDoc);
$feedDocument = $createDocumentResponse->dto();

// Run transformer here:
$json = Transformer::fromFile(
    InventoryAvailability::$feedType,
    'your/feed/file.xml',
    'ATVPDKIKX0DER'
);
$feedContents = json_encode($json);
$feedDocument->upload($feedType, $feedContents);

$createFeedSpec = new CreateFeedSpecification(
    marketplaceIds: ['ATVPDKIKX0DER'],
    inputFeedDocumentId: $feedDocument->feedDocumentId,
    feedType: $feedType,
);

// Create feed with the feed document we just uploaded
$createFeedResponse = $feedsApi->createFeed($createFeedSpec);