code: async def fetch_signatures(endpoint, protocol, idgen):
          
          async with aiohttp.ClientSession() as session:
              req = {
                  "method": "getMethodTypes",
                  "params": [''],
                  "version": "1.0",
                  "id": next(idgen),
              }
  
              if protocol == ProtocolType.WebSocket:
                  async with session.ws_connect(endpoint, timeout=2) as s:
                      await s.send_json(req)
                      res = await s.receive_json()
                      return res
              else:
                  res = await session.post(endpoint, json=req)
                  json = await res.json()
  
                  return json
docs: Request available methods for the service.