isCVVValid static method

bool isCVVValid(
  1. String? value
)

Implementation

static bool isCVVValid(String? value) {
  if (value == null || value.trim().isEmpty) return false;

  var cvcValue = value.trim();
  var validLength = cvcValue.length >= 3 && cvcValue.length <= 4;
  return !(!isWholeNumberPositive(cvcValue) || !validLength);
}