Transform a CIP 7 number in a CIP 13 one.
Language: Ruby
Just call the cip7tocip13 function with your CIP 7 number as argument.
You can also call the check_cip13 function to check if your CIP 13 number is valid, or directly compute_checksum to generate a new checksum.
num = CIP7toCIP13.cip7tocip13(3358854) # returns 3400933588540
valid = CIP7toCIP13.check_cip13(3400933588540) # returns true
digit = CIP7toCIP13.compute_checksum(340093358854) # returns 0
http://www.ucdcip.org/telechargements/CIP_Calcul_de_la_cle_ucd.pdf