Financial Integrity

To prevent floating-point errors in financial calculations, enforce integer or high-precision decimal arithmetic using decimal.js. This Penny Perfect rule ensures provable monetary accuracy across all transactions.

Maintain an immutable audit trail for revenue tracking by using append-only financial records with reversal and correction transactions. This preserves historical data and ensures provably accurate financial reports.

Invariant testing with fast-check proves financial calculation accuracy by applying property-based tests. This verifies that financial laws hold true for all possible inputs in your revenue calculations.

Use DECIMAL(19, 4) for unit prices and DECIMAL(19, 2) for final transaction amounts. These storage standards enforce high-precision decimal arithmetic and prevent rounding errors in invoicing.

Handle multi-currency exchange rates safely in invoicing by capturing the exchange rate at the exact time of transaction. This avoids exchange rate drift and ensures provable financial accuracy across multi-currency contexts.

You need high-precision decimal arithmetic for pricing calculations whenever applying the Penny Perfect rule. It is required for all pricing, invoicing, and revenue calculations to ensure provable financial accuracy.