- Date format: ISO8601
- Phone format: E164 (Must include + as a prefix and the country calling code, for example "+330612345678" or "+14151234567")
- All rounding calculations (e.g. tax) are done using the banking rule of rounding half to even.
- All discounts at the order level and item level are cumulative. The total discount is thus the sum of the order level and item level.
- Amounts are reflected by shifted integer (x100), for example 1.5€ or $1.50 becomes 150 cents.