22 lines
861 B
Markdown
22 lines
861 B
Markdown
# Spec delta: invoice
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## ADDED Requirements
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### Requirement: Invoice request
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Customers SHALL request at most one open invoice (发票) per order, with title, kind (`personal | company`), and tax_no required for company invoices. Amount equals the order total in the order currency.
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#### Scenario: company invoice requires tax number
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- **WHEN** requesting a company invoice without tax_no
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- **THEN** the API returns 400
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#### Scenario: duplicate rejected
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- **WHEN** an order already has a requested or issued invoice
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- **THEN** a second request returns 409
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### Requirement: Invoice issuance
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Merchants SHALL issue requested invoices of their own shop's orders; issuing sets invoice_no, issued_at and status `issued`.
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#### Scenario: issue flow
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- **WHEN** the shop issues a requested invoice
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- **THEN** the customer sees status `issued` with an invoice number
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