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exchange_rate_manager: raise exception if 'error' is in json_response

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If the error is not handled, the running daemon will continuously
print the following error message:
```
Traceback (most recent call last):
  File "lbry/extras/daemon/exchange_rate_manager.py", line 77, in get_rate
  File "lbry/extras/daemon/exchange_rate_manager.py", line 189, in get_rate_from_response
KeyError: 0
```

This started happening when the UPBit exchange decided to delist
the LBC coin.

Normally `json_response` should be a dictionary, not a list,
so `json_response[0]` causes an error.

By checking for the `'error'` key, we can raise the proper exception.

Once this is done, the message will be a warning, not a traceback.
```
WARNING  lbry.extras.daemon.exchange_rate_manager:92:
Failed to get exchange rate from UPbit: result not found
```
This commit is contained in:
belikor 2021-07-13 11:54:14 -05:00 committed by Lex Berezhny
parent d151a82d78
commit b7791d2845
1 changed files with 1 additions and 1 deletions
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2
lbry/extras/daemon/exchange_rate_manager.py
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@ -186,7 +186,7 @@ class UPbitBTCFeed(MarketFeed):
params = {"markets": "BTC-LBC"}
def get_rate_from_response(self, json_response):
if len(json_response) != 1 or 'trade_price' not in json_response[0]:
if "error" in json_response or len(json_response) != 1 or 'trade_price' not in json_response[0]:
raise InvalidExchangeRateResponseError(self.name, 'result not found')
return 1.0 / float(json_response[0]['trade_price'])