nationalES function
Implementation
String nationalES(String bban, BbanStructure structure) {
const List<int> weights = [1, 2, 4, 8, 5, 10, 9, 7, 3, 6];
final String combined = [PartType.BANK_CODE, PartType.BRANCH_CODE]
.map((p) => structure.extractValueMust(bban, p))
.join("");
int to11(int v) {
if (v == 10) {
return 1;
} else if (v == 11) {
return 0;
}
return v;
}
final d1 = to11(mod11("00$combined", weights));
final d2 = to11(mod11(
structure.extractValueMust(bban, PartType.ACCOUNT_NUMBER), weights));
return "$d1$d2";
}