/// <summary>
/// Validates the account number as a Type 3 account. Will try to fix any errors in the account number. If not being able to
/// fix an incomplete account number an exception will be thrown.
/// </summary>
/// <param name="clearingNumber">The clearing number should be 4 digits.</param>
/// <param name="accountNumber">The account number should be max 10 digits. Will be leftpadded with zeroes if shorter.</param>
private static void ValidateType3(string clearingNumber, ref string accountNumber)
{
// Def. Type 3 Account (BGC: Type 2, Remark 1)
// (1) The clearing number should be 4 digits, and is not a part of the account number.
// (2) The account number should be 10 digits (if less than 10 charcters, leftpaded with zeroes).
// (3) Checksum calculation is made on the last 10 digits in the account number (modulus 10 check).
// Clearing number should be 4 digits
if (clearingNumber.Length != 4)
{
throw new ArgumentException(
string.Format("clearingNumber is {0} characters long. Expected 4 characters.",
clearingNumber.Length));
}
// Account numbers with less than 10 digits should be leftpadded with zeroes.
accountNumber = accountNumber.PadLeft(10, '0');
// Account number should be 10 digits
if (accountNumber.Length != 10)
{
throw new ArgumentException(
string.Format("accountNumber is {0} characters long. Expected 10 characters.",
accountNumber.Length));
}
if (!ModulusCheck.Mod10(accountNumber))
{
throw new ArgumentException(string.Format("accountNumber has an invalid checksum (Type 3)."));
}
}
/// <summary>
/// Validates the account number as a Type 5 account. Will try to fix any errors in the account number. If not being able to
/// fix an incomplete account number an exception will be thrown.
/// </summary>
/// <param name="clearingNumber"></param>
/// <param name="accountNumber"></param>
private static void ValidateType5(string clearingNumber, ref string accountNumber)
{
// Def. Type 5 Account (BGC: Type 2, Remark 3)
// (1) The clearing number should be 4-5 digits, and is not a part of the account number.
// (2) The account number should be 7-10 digits (no padding).
// (3) Checksum calculations is made on the last 7-10 digits in the account number (modulus 10 check).
if (accountNumber.Length > 10 || accountNumber.Length < 7)
{
throw new ArgumentException(
string.Format("accountNumber is {0} characters long. Expected 7-10 characters.",
accountNumber.Length));
}
if (!ModulusCheck.Mod10(accountNumber))
{
throw new ArgumentException(string.Format("accountNumber has an invalid checksum (Type 5)."));
}
}
