//@NonNull
//@CardBrand
private static string GetPossibleCardType(string cardNumber, bool shouldNormalize)
{
if (string.IsNullOrWhiteSpace(cardNumber))
{
return(Card.UNKNOWN);
}
var spacelessCardNumber = cardNumber;
if (shouldNormalize)
{
spacelessCardNumber = StripeTextUtils.RemoveSpacesAndHyphens(cardNumber);
}
if (StripeTextUtils.HasAnyPrefix(spacelessCardNumber, Card.PREFIXES_AMERICAN_EXPRESS))
{
return(Card.AMERICAN_EXPRESS);
}
else if (StripeTextUtils.HasAnyPrefix(spacelessCardNumber, Card.PREFIXES_DISCOVER))
{
return(Card.DISCOVER);
}
else if (StripeTextUtils.HasAnyPrefix(spacelessCardNumber, Card.PREFIXES_JCB))
{
return(Card.JCB);
}
else if (StripeTextUtils.HasAnyPrefix(spacelessCardNumber, Card.PREFIXES_DINERS_CLUB))
{
return(Card.DINERS_CLUB);
}
else if (StripeTextUtils.HasAnyPrefix(spacelessCardNumber, Card.PREFIXES_VISA))
{
return(Card.VISA);
}
else if (StripeTextUtils.HasAnyPrefix(spacelessCardNumber, Card.PREFIXES_MASTERCARD))
{
return(Card.MASTERCARD);
}
else
{
return(Card.UNKNOWN);
}
}
public static bool IsValidCardNumber(string cardNumber)
{
var normalizedNumber = StripeTextUtils.RemoveSpacesAndHyphens(cardNumber);
return(IsValidLuhnNumber(normalizedNumber) && IsValidCardLength(normalizedNumber));
}