achx

func ABA8 ¶

func ABA8(rtn string) string

ABA8 returns the first 8 digits of an ABA routing number. If the input is invalid then an empty string is returned.

func ABACheckDigit ¶

func ABACheckDigit(rtn string) string

ABACheckDigit returns the last digit of an ABA routing number. If the input is invalid then an empty string is returned.

func TraceNumber ¶

func TraceNumber(routingNumber string) (string, error)

TraceNumber returns a trace number from a given routing number and uses a hidden random generator. These values are not expected to be cryptographically secure.

We decided not to increment trace numbers from a shared counter because it will create a lot of "NNNNN00001" trace numbers that are duplicated and hard to uniquely identify a Transfer.