The sample code in the README does not work, and the ->upload() helper seems to have issues under v7.1

[misterakko]

Problem description:

The sample code provided in the README file for feeds does not work anymore under v7 of the library.

Error:

Warning: Uncaught Error: Class "CreateFeedDocumentSpecification" not found

Code

 use SellingPartnerApi\Seller\FeedsV20210630\Dto\CreateFeedSpecification;
$feedType = 'POST_PRODUCT_PRICING_DATA';
$connector = SellingPartnerApi::seller(/* ... */);
$feedsApi = $connector->feedsV20210630();
// Create feed document
$contentType = CreateFeedDocumentResponse::getContentType($feedType);
$createFeedDoc = new CreateFeedDocumentSpecification($contentType);

I have rewritten the sample code in the hope of doing something useful for the community, but it looks like the FeedDocument::upload() helper method itself has issues now.

$feedType = 'JSON_LISTINGS_FEED';
   $feedContentType = 'application/json; charset=UTF-8';
   $feedsApi = $amazon->mySeller->FeedsV20210630();
   // Create feed document
   $createFeedDocSpec = new SellingPartnerApi\Seller\FeedsV20210630\Dto\CreateFeedDocumentSpecification($feedContentType);
   $createDocumentResponse = $feedsApi->createFeedDocument($createFeedDocSpec);
   $feedDocumentInfo = $createDocumentResponse->json();
   $feedDocument = $createDocumentResponse->dto();
try {
   $feedDocument->upload($feedType, $exportFile);
   }
catch (Exception $e) {
   echo "Error: " . $e->getResponse()->getBody()->getContents();
}

Returns:

Error: <?xml version="1.0" encoding="UTF-8"?>
<Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message><AWSAccessKeyId>AKIAX2ZVOZFBIPHKZ57H</AWSAccessKeyId><StringToSign>AWS4-HMAC-SHA256
20240812T084245Z
20240812/eu-west-1/s3/aws4_request