[PW-8375] Possible incorrect implementation of `isFullInvoiceAmountManuallyCaptured`

[maaarghk]

Adyen\Payment\Helper\Invoice::isFullInvoiceAmountManuallyCaptured seems like it may have a bug on multi-currency setups.

I'm not sure about generic reproduction steps but this is an accurate description of behaviour I'm seeing in prod:

• Magento: GBP base currency with alternative currencies enabled
• Adyen: GBP only

1. Enable manual capture
2. As customer select alternative currency (JPY and USD both seem affected)
3. Place order
4. As admin, note order with base_grand_total = 1000 GBP, grand_total = 150000 JPY
5. Create invoice, observe same figures on invoice
6. Capture from interface and await webhook

Observe:

• adyen_invoice has amount = 1000; status = successful
• adyen_order_payment has amount = 1000; status = manually captured
• isFullInvoiceAmountManuallyCaptured compares $invoiceAmountCents based on sales_invoice.grand_total in alternative currency:

  $invoiceAmountCents = $this->adyenDataHelper->formatAmount(
      $invoice->getGrandTotal(),
      $invoice->getOrderCurrencyCode()
  );
  

  with $invoiceCapturedAmount based on adyen_invoice.amount in store base currency:

  $invoiceCapturedAmount += $adyenInvoice[\Adyen\Payment\Api\Data\InvoiceInterface::AMOUNT];
  

  and therefore returns false
• Magento\Sales\Model\Order\Invoice::pay() is never called and order remains in pending state

Expected behavior isFullInvoiceAmountManuallyCaptured should be aware of the adyen_invoice.amount currency and do a comparison on the appropriate sales_order.<base_>grand_total amount

Magento version

            "name": "adyen/module-payment",
            "version": "8.14.0",
            "name": "adyen/php-api-library",
            "version": "13.0.4",
            "name": "adyen/php-webhook-module",
            "version": "0.6.0",
            "name": "magento/magento2-base",
            "version": "2.4.3-p3",