Shipping addresses with lettered currencies are not mapped to enum

[MiltosKaripidisPoq]

Describe the bug
The PayPal SDK fails to map the currency from the shipping method when the country's currency contains letters rather than symbols. For example, Norway's kr compared to German's €.

The failure is happening on the Repository class (1079 line) and specifically in this function:

fun getShippingAndPickUpOptions(selectedShippingMethod: ShippingMethodType): List<Options> {
        val currencyCode: CurrencyCode = when {
            debugConfigManager.currencyCode != null -> debugConfigManager.currencyCode!!
            shippingMethodsList.isNotEmpty() -> CurrencyCode.valueOf(shippingMethodsList.first().amount?.currencyFormatSymbolISOCurrency?.filter { it.isLetter() }.orEmpty())
            pickUpMethodsList.isNotEmpty() -> CurrencyCode.valueOf(pickUpMethodsList.first().amount?.currencyFormatSymbolISOCurrency?.filter { it.isLetter() }.orEmpty())
            else -> CurrencyCode.USD
        }
        ...

In our example, the following line gets the value of currencyFormatSymbolISOCurrency which is zł290PLN. The following line filters it and gets the result złPLN, which of course cannot be mapped to the CurrencyCode enum that expects just PLN.

CurrencyCode.valueOf(shippingMethodsList.first().amount?.currencyFormatSymbolISOCurrency?.filter { it.isLetter() }.orEmpty())

To Reproduce
Steps to reproduce the behavior:

1. Have a shipping method of a country with lettered currency like Poland, Norway, etc.
2. Click PayPal button to initialise it.

Expected behavior
Currency to be mapped correctly so the flow can proceed.

Additional context
I am using 1.1.0 version.

The API that is made by PayPal is /graphql and field path from the response is data.checkoutSession.cart.shippingMethods[0].amount.currencyFormatSymbolISOCurrency.

[github-actions]

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• PayPal Android SDK

[MiltosKaripidisPoq]

@chpypl Could you please review it and point me to the right direction? Is it a misconfiguration from my side or an SDK issue? Thanks in advance.

[balapoq]

@MaxHastingsPP / @chpypl can we get some help with this issue please? We have an existing Paypal integration based on this SDK. We are planning to move to the new Braintree/Paypal SDK in the coming months but are currently in the process of launching apps with the existing integration in countries where the currency codes are alphanumeric. This issue is blocking the release of the apps. Any help will be much appreciated 🙏