# Payments Integration (Moyasar)

This ExecPlan follows `docs/PLANS.md`.

## Purpose / Big Picture
Create payments idempotently, reconcile webhook states safely, and keep payment history auditable.

## Progress
- [x] (2026-02-28 14:35Z) Plan created.
- [x] (2026-02-28 15:55Z) Payment creation + webhook processing implemented.
- [x] (2026-02-28 16:10Z) Tests for create/idempotency/webhooks implemented.
- [x] (2026-02-28 16:20Z) Risks updated.

## Surprises & Discoveries
- Observation: missing `requests` dependency blocked gateway calls initially.
  Evidence: `ModuleNotFoundError: requests`.

## Decision Log
- Decision: enforce request-level idempotency key for payment create.
  Rationale: prevent duplicate charges on retries.
  Date/Author: 2026-02-28/Codex
- Decision: persist provider + webhook payloads.
  Rationale: payment auditability/debuggability.
  Date/Author: 2026-02-28/Codex

## Outcomes & Retrospective
Completed for MVP core flow (create + webhook). Remaining work: richer operational monitoring and optional admin capture/refund APIs.

## Context and Orientation
- Payment model/services/views: `backend/apps/payments/`
- Booking dependency: `backend/apps/bookings/`

## Plan of Work
Completed for current scope.

## Validation and Acceptance
From `backend/`:
- `python3 -m pytest backend/apps/payments/tests`
Acceptance:
- New key => new payment.
- Same key => existing payment reused.
- Valid webhook transitions state idempotently.
- Invalid webhook auth rejected.

## Idempotence and Recovery
Idempotency key guards create path; webhook replay is safe.