Stripe's human-readable invoice number (e.g. SES-0042), null while the invoice is still a draft.

The full invoice amount in currency subunits — the canonical "what this invoice was for" number to display in lists. Mirrors Stripe's invoice.total, which stays stable after the invoice is paid (unlike amount_due, which drops to zero on payment).

ISO 4217 currency code, lowercase.

Stripe-hosted invoice page URL. Surfaced on internal admin views; not used in the business admin (which renders our own invoice page).

Direct link to the Stripe-rendered PDF for this invoice.

Per-line breakdown shown on the invoice detail page.