krakenfutures: replace assert with typed None-guard for ruff S101
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@@ -99,13 +99,15 @@ class Krakenfutures(Exchange):
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usd_total = self._safe_float(raw_total)
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if usd_free is not None or usd_total is not None:
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# Use available value for both if only one is present
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usd_free = usd_free if usd_free is not None else usd_total
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usd_total = usd_total if usd_total is not None else usd_free
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# Type narrowing for mypy: both values are set after fallback.
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assert usd_free is not None and usd_total is not None
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# Both values are guaranteed to be present after fallback.
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usd_used = max(0.0, usd_total - usd_free)
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balances["USD"] = {"free": usd_free, "used": usd_used, "total": usd_total}
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usd_free_value = usd_free if usd_free is not None else usd_total
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usd_total_value = usd_total if usd_total is not None else usd_free
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if usd_free_value is not None and usd_total_value is not None:
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usd_used = max(0.0, usd_total_value - usd_free_value)
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balances["USD"] = {
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"free": usd_free_value,
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"used": usd_used,
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"total": usd_total_value,
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}
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# Remove additional info from ccxt results (same as base class)
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balances.pop("info", None)
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