code: def validate_addr(self, address, id=None, endpoint=None):
          
          return self._call_endpoint(VALIDATE_ADDR, params=[address], id=id, endpoint=endpoint)
docs: returns whether or not addr string is valid
  
          Args:
              address: (str) address to lookup ( in format 'AXjaFSP23Jkbe6Pk9pPGT6NBDs1HVdqaXK')
              id: (int, optional) id to use for response tracking
              endpoint: (RPCEndpoint, optional) endpoint to specify to use
  
          Returns:
              json object of the result or the error encountered in the RPC call