base58.py

""" base58 encoding / decoding functions """
# https://pastebin.com/TghewQTM
alphabet = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
base_count = len(alphabet)
       
def encode(num):
    """ Returns num in a base58-encoded string """
    encode = ''
    
    if (num < 0):
        return ''
    
    while (num >= base_count):    
        mod = num % base_count
        encode = alphabet[mod] + encode
        num = num // base_count
    
    if (num):
        encode = alphabet[num] + encode
    
    return encode
 
def decode(s):
    """ Decodes the base58-encoded string s into an integer """
    decoded = 0
    multi = 1
    s = s[::-1]
    for char in s:
        decoded += multi * alphabet.index(char)
        multi = multi * base_count
        
    return decoded