code: def xrb_address_to_public_key(address):
      
  
      address = bytearray(address, 'ascii')
  
      if not address.startswith(b'xrb_'):
          raise ValueError('address does not start with xrb_: %s' % address)
  
      if len(address) != 64:
          raise ValueError('address must be 64 chars long: %s' % address)
  
      address = bytes(address)
      key_b32xrb = b'1111' + address[4:56]
      key_bytes = b32xrb_decode(key_b32xrb)[3:]
      checksum = address[56:]
  
      if b32xrb_encode(address_checksum(key_bytes)) != checksum:
          raise ValueError('invalid address, invalid checksum: %s' % address)
  
      return key_bytes
docs: Convert an xrb address to public key in bytes
  
      >>> xrb_address_to_public_key('xrb_1e3i81r51e3i81r51e3i81r51e3i'\
                                    '81r51e3i81r51e3i81r51e3imxssakuq')
      b'00000000000000000000000000000000'
  
      :param address: xrb address
      :type address: bytes
  
      :return: public key in bytes
      :rtype: bytes
  
      :raises ValueError: