error

[yasserdzx]

orderBook = api.returnOrderBook(pair, depth=10000000)

File "/Users/yasserben/opt/anaconda3/lib/python3.9/site-packages/poloniex/poloniex.py", line 100, in returnOrderBook
return self._public('returnOrderBook', currencyPair=currencyPair,
File "/Users/yasserben/opt/anaconda3/lib/python3.9/site-packages/poloniex/poloniex.py", line 50, in _fn
raise PoloniexCommandException(respdata['error'])
poloniex.exceptions.PoloniexCommandException: Invalid currencyPair parameter.