isValid method
bool
isValid(
- String? cnpj, [
- dynamic stripBeforeValidation = true
])
Implementation
bool isValid(String? cnpj, [stripBeforeValidation = true]) {
if (stripBeforeValidation) {
cnpj = strip(cnpj);
}
if (cnpj == null || cnpj.isEmpty) {
return false;
}
if (blackList.contains(cnpj)) {
return false;
}
if (cnpj.length != 14) {
return false;
}
String numbers = cnpj.substring(0, 12);
numbers += _verifierDigit(numbers).toString();
numbers += _verifierDigit(numbers).toString();
return numbers.substring(numbers.length - 2) ==
cnpj.substring(cnpj.length - 2);
}