When specifying multiple pairs to download, the json filenames were
inconsistent due to the reassignment of candle_type. Also adds the
candle_type being downloaded to a log message.
Only KuCoin messages for 429000 error code are logged once.
Logs functions are also simplified and optimized.
test_remove_logs_for_pairs_already_in_blacklist is simplified as well.
More logs are reduced, for KuCoin, on the retrier_async decorator:
_async_get_candle_history() returned exception
retrying _async_get_candle_history() still for
Giving up retrying: _async_get_candle_history()
Applying DDosProtection backoff delay
KuCoin APIs generate A LOT of error messages.
Consequently, logs are flooded with lines like:
2021-12-25 22:30:23 freqtrade.exchange.common: WARNING -
_async_get_candle_history() returned exception:
"kucoin GET https://openapi-v2.kucoin.com/api/v1/market/candles?
symbol=PDEX-USDT&type=5min&startAt=1640317818&endAt=1640467818
429 Too Many Requests {"code":"429000","msg":"Too Many Requests"}"
2021-12-25 22:30:23 freqtrade.exchange.common: WARNING -
retrying _async_get_candle_history() still for 3 times
2021-12-25 22:30:23 freqtrade.exchange.common: WARNING -
Kucoin 429 error, avoid triggering DDosProtection backoff delay.
2 tries left before giving up
2021-12-25 22:30:24 freqtrade.exchange.common: WARNING -
_async_get_candle_history() returned exception:
"kucoin GET https://openapi-v2.kucoin.com/api/v1/market/candles?
symbol=UBX-USDT&type=5min&startAt=1640317821&endAt=1640467821
429 Too Many Requests {"code":"429000","msg":"Too Many Requests"}"
Messages like:
Kucoin 429 error, avoid triggering DDosProtection backoff delay.
are logged only once for a certain period of time (default is 3600 seconds).
