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Add some comments to clarify the bound-setting logic.

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This commit is contained in:
Kuy Krawczeniuk 2021-03-26 14:16:00 -07:00
parent f21ef11db0
commit dc87f4449b
1 changed files with 8 additions and 0 deletions
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8
freqtrade/data/history/history_utils.py
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@ -180,18 +180,22 @@ def _download_pair_history(datadir: Path, exchange: Exchange, pair: str, *,
logger.debug("Cached End: %s",
f"{cached_end:%Y-%m-%d %H:%M:%S}" if not cached_end else 'None')
# Set the bounds for downloading
since_ms, until_ms = None, None
if cached.empty:
if since:
since_ms = since.timestamp() * 1000
else:
# The default lower-bound is 30 days before the current time.
since_ms = arrow.utcnow().shift(days=-30).float_timestamp * \
1000
if until:
until_ms = until.timestamp() * 1000
else:
# Default upper-bound is the current time.
until_ms = datetime.now(timezone.utc).timestamp() * 1000
else:
# Determine lower bound
if since:
if since < cached_start:
since_ms = since.timestamp() * 1000
@ -200,7 +204,10 @@ def _download_pair_history(datadir: Path, exchange: Exchange, pair: str, *,
else:
since_ms = cached_end.timestamp() * 1000
else:
# Set lower-bound to the end of the cache if not provided
since_ms = cached_end.timestamp() * 1000
# Determine upper bound
if until:
if until < cached_start:
until_ms = cached_start.timestamp() * 1000
@ -209,6 +216,7 @@ def _download_pair_history(datadir: Path, exchange: Exchange, pair: str, *,
else:
until_ms = until.timestamp()
else:
# Default upper-bound is the current time.
until_ms = datetime.now(timezone.utc).timestamp() * 1000
new_data = exchange.get_historic_ohlcv(pair=pair,