import asyncio


MAX_ITEMS = 10

class Depth:
  def __init__(self):
    self.bids = []
    self.asks = []

    self._event = asyncio.Event()

  async def wait(self):
    await self._event.wait()

  def askVolumeUntil(self, price):
    ret = 0
    for i in range(len(self.asks)):
      if self.asks[i][0] > price: break
      ret += self.asks[i][1]
    return ret