Игорь Надеин
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13 lines
454 B
Python
13 lines
454 B
Python
"""Versioned contribution shared by calculation, reconstruction and ledger."""
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from decimal import Decimal
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def carryover_contribution(kind: str, amount: Decimal, *, version: int = 2) -> Decimal:
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if version not in (1, 2):
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raise ValueError("Unsupported payroll balance rules version")
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increases = kind in {"adjustment_debit", "deduction"} or (
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kind == "payment" and version == 1
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)
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return amount if increases else -amount
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