Just base 64 encoding and decoding with URL safe call with hex string output.

base64_urlsafe.py

import base64

def base64_decode(encoded_str, url_safe=True):
    hexadecimal_hash = ''
    padding = 4 - (len(encoded_str) % 4)
    if padding and padding != 4:  # Padding can be 1, 2, or 3
        encoded_str += '=' * padding
        print(encoded_str)
        
    if url_safe:
        decoded_bytes = base64.urlsafe_b64decode(encoded_str)
    else:
        decoded_bytes = base64.b64decode(encoded_str)
    try:
        hex_str = ''.join(['{:02x}'.format(byte) for byte in decoded_bytes])
    except Exception as ex:
        print("Could not decode.", ex)
        
    return hex_str
    

def base64_encode(hex_str, url_safe=True):
    data = bytes.fromhex(hex_str)
    if url_safe:
        encoded_bytes = base64.urlsafe_b64encode(data)
    else:
        encoded_bytes = base64.b64encode(data)
    
    encoded_str = encoded_bytes.decode('utf-8')
    return encoded_str


# Example usage:
data = '81dc9bdb52d04dc20036dbd8313ed055'

encoded = base64_encode(data)

print(encoded)

encoded_hash = "gdyb21LQTcIANtvYMT7QVQ=="
print(encoded_hash)
decoded = base64_decode(encoded_hash)

print(decoded)