# No copyright
import logging

class Pair:
  def __init__(self, pb, names):
    self.names = names
    self._pb   = pb

  async def update(self):
    ticker = (await self._get("ticker"))["data"]
    self.ticker = Ticker(ticker)

  async def _get(self, suffix):
    res = await self._pb.get(f"https://public.bitbank.cc/{self.names[0]}_{self.names[1]}/{suffix}")
    json = await res.json()
    if "success" not in json or 1 != json["success"]:
      code = json["data"]["code"]
      raise Exception(f"API error: {code}")
    return json

class Ticker:
  def __init__(self, json):
    self.price = float(json["last"])