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https://github.com/fawney19/Aether.git
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1d9c77522a
- 删除全部 Python 源码 (src/) 及 Alembic 迁移脚本，归档至 _deprecated_py_src/ - 重构 Rust gateway ai_pipeline: 拆分 planner/finalize 模块，新增 contracts/adaptation 层 - 重组 handlers 模块为 admin/public/proxy/internal/shared 子模块结构 - 新增 executor 模块，引入 Rust 原生数据库迁移 (aether-data/migrations) - 简化 CI/Docker 构建流程，移除 base image 二级构建，统一为单一 app image - 移除 Python 相关基础设施文件 (entrypoint.sh, gunicorn_conf.py, Dockerfile.base)
55 lines
1.8 KiB
Python
55 lines
1.8 KiB
Python
"""
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Precision helpers for billing calculations.
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We standardize money arithmetic with `Decimal` and quantize to stable precisions.
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Notes:
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- `Decimal` context precision (`DECIMAL_CONTEXT_PRECISION`) is **significant digits**,
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not "decimal places".
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- We keep these as constants (not runtime-configurable) to avoid drift between
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environments during billing reconciliation.
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"""
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from __future__ import annotations
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from decimal import ROUND_HALF_UP, Decimal, localcontext
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# Decimal context precision (significant digits)
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DECIMAL_CONTEXT_PRECISION = 28
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# Money precisions
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BILLING_STORAGE_PRECISION = 8 # persisted to DB / metadata
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BILLING_DISPLAY_PRECISION = 6 # UI display
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def to_decimal(value: float | int | str | Decimal | None) -> Decimal:
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"""Convert values to Decimal safely (float via str to avoid binary artifacts)."""
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if value is None:
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return Decimal("0")
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if isinstance(value, Decimal):
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return value
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return Decimal(str(value))
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def to_money_decimal(value: float | int | str | Decimal | None) -> Decimal:
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"""Convert values to Decimal and quantize to billing storage precision."""
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return quantize_cost(to_decimal(value))
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def quantize_decimal(value: Decimal, *, precision: int) -> Decimal:
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"""Quantize a Decimal to the given number of decimal places (ROUND_HALF_UP)."""
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quantizer = Decimal(10) ** -precision
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with localcontext() as ctx:
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ctx.prec = DECIMAL_CONTEXT_PRECISION
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return value.quantize(quantizer, rounding=ROUND_HALF_UP)
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def quantize_cost(value: Decimal) -> Decimal:
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"""Quantize to storage precision."""
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return quantize_decimal(value, precision=BILLING_STORAGE_PRECISION)
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def quantize_display(value: Decimal) -> Decimal:
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"""Quantize to display precision."""
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return quantize_decimal(value, precision=BILLING_DISPLAY_PRECISION)
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