public async Task <Tuple <string, Guid?> > GetReceiptAsync(string originalTransactionId)
{
var receipt = await _metaDataRespository.GetAsync("AppleReceipt", originalTransactionId);
if (receipt == null)
{
return(null);
}
return(new Tuple <string, Guid?>(receipt.ContainsKey("Data") ? receipt["Data"] : null,
receipt.ContainsKey("UserId") ? new Guid(receipt["UserId"]) : (Guid?)null));
}