MRA-04 — Reseller app — cart, checkout & confirmation

SummaryCopy Anchor Link

Cart with live re-validation messages, address book, payment method with credit availability, order note, idempotent checkout, confirmation.

DescriptionCopy Anchor Link

Checkout turns the server-side cart (shared with the reseller web, ORD-01) into an order, and every rule — minimum amount, quantities, stock, credit, promotions — is re-validated by the server, so the app's job is to show issues clearly and submit exactly once (ORD-02, ORD-03, FIN-05). Scope: cart RA-17 with live re-validation messages, checkout RA-18 (address, payment method with credit availability, delivery fee, note, summary), address book RA-19 and confirmation RA-20. Per the 17 Oct decision no order is confirmed automatically: the confirmation screen says the order is « Envoyée » and waits for HOCO's confirmation (ORD-14). It needs cart.*, cart.checkoutOptions, cart.checkout (Idempotency-Key required) and addresses.* (SRV-15, SRV-18) and Akram's DES-08 validation messages. The cart widgets live in hoco_catalog because MDA-09 builds the assisted order with them; MRA-05 shows the resulting order.

SubtasksCopy Anchor Link

DeliverablesCopy Anchor Link

• apps/reseller/lib/src/features/cart/ and features/checkout/ (cart, checkout, addresses, confirmation)
• packages/hoco_catalog/lib/src/cart/ (line tile, issue banner, totals block)
• integration_test/checkout_test.dart
• Firebase App Distribution build 0.3.0 (staging) with the ordering flow

Acceptance criteriaCopy Anchor Link

• A lost connection during « Valider la commande » followed by a retry creates exactly one order; the retry returns the same order with Idempotent-Replayed: true (ORD-03)
• A price change between cart and checkout returns CART_CHANGED and the reseller sees and confirms the new totals before the order is created (PRC-05)
• Credit is offered only up to the available amount; above it the method is disabled or CREDIT_LIMIT_EXCEEDED is explained (FIN-05)
• The minimum-amount banner shows the exact amount missing and blocks submission (ORD-02)
• The confirmation shows the order as « Envoyée » awaiting HOCO's confirmation — never as « Validée » (ORD-14)
• A cart changed on the reseller web is reflected after returning to the app

Requirements coveredCopy Anchor Link

ScreensCopy Anchor Link

API surfaceCopy Anchor Link

Test measuresCopy Anchor Link

• integration_test of cart → checkout → confirmation, including a simulated network drop and retry with the same key
• Widget tests of each issue code banner and of the CART_CHANGED diff dialog
• Unit test that the checkout Idempotency-Key is stable for one checkout session and renewed for the next

RisksCopy Anchor Link

• Users double-submit on slow networks — single in-flight guard plus the idempotent key; tested on a throttled 3G profile

KPICopy Anchor Link

• Delivered by Sun 15 Nov 2026 within 1.5 person-day(s).
• Every acceptance criterion above demonstrated before hand-off; linked requirements' acceptance criteria pass.
• Zero open critical defects, permission gaps or data-integrity regressions at sign-off.

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