async def fetch_trades(self, symbol, since=None, limit=None, params={}):
    (await self.load_markets())
    market = self.market(symbol)
    request = {'id': market['id']}
    response = (await self.publicGetMarketIdTrades(self.extend(request, params)))
    return self.parse_trades(response, market, since, limit)
async def fetch_trades(self, symbol, since=None, limit=None, params={}):
    (await self.load_markets())
    market = self.market(symbol)
    request = {'id': market['id']}
    response = (await self.publicGetMarketIdTrades(self.extend(request, params)))
    return self.parse_trades(response, market, since, limit)