{
  "schemaVersion": 1,
  "chart": "architecture",
  "theme": "clean",
  "render": {
    "width": 1040,
    "padding": 24,
    "scale": 2
  },
  "data": {
    "id": "order-event-architecture",
    "locale": "en-US",
    "eyebrow": "Synthetic Technical Case",
    "title": "Order Events: Requests, Ownership, and Delivery",
    "subtitle": "Arrows indicate layer grouping only. Node text defines specific dependencies, event routes, and data ownership.",
    "layers": [
      {
        "tag": "Entry",
        "accent": 1,
        "nodes": [
          {
            "name": "Storefront",
            "desc": "Synchronously calls the order service to create an order.",
            "icon": "code"
          },
          {
            "name": "Payment Platform",
            "desc": "Synchronously calls the callback service with a callback ID.",
            "icon": "shield"
          }
        ]
      },
      {
        "tag": "Services",
        "accent": 1,
        "nodes": [
          {
            "name": "Order State and Event Publishing",
            "desc": "Order service: writes Order DB; publishes OrderCreated asynchronously; consumes PaymentConfirmed, committing payment status and consumed event ID together.",
            "icon": "package"
          },
          {
            "name": "Callback Deduplication and Events",
            "desc": "Callback service: writes Callback DB; acknowledges after commit; deduplicates by callback ID; publishes PaymentConfirmed asynchronously.",
            "icon": "shield"
          },
          {
            "name": "Inventory Reservation and Deduplication",
            "desc": "Inventory consumer: receives OrderCreated asynchronously; commits reservation and consumed event ID together.",
            "icon": "layers"
          }
        ]
      },
      {
        "tag": "Resources",
        "accent": 1,
        "nodes": [
          {
            "name": "Order DB",
            "desc": "PostgreSQL; only the order service reads and writes it. Order and outbox commit together; stores consumed event IDs.",
            "icon": "lock"
          },
          {
            "name": "Callback DB",
            "desc": "Separate PostgreSQL; only the callback service reads and writes it. Callback ID and outbox commit together.",
            "icon": "lock"
          },
          {
            "name": "Inventory DB",
            "desc": "Separate PostgreSQL; only the inventory consumer reads and writes it. Stores reservations and consumed event IDs.",
            "icon": "lock"
          },
          {
            "name": "Business Event Queue",
            "desc": "At-least-once delivery. OrderCreated → inventory consumer; PaymentConfirmed → order service.",
            "icon": "layers"
          }
        ]
      }
    ],
    "connectors": [
      {
        "label": "Layer grouping only"
      },
      {
        "label": "Layer grouping only"
      }
    ],
    "footerLabel": "Delivery Boundaries",
    "footer": "Order and callback services retry failed publishing from their own outboxes. Callback IDs deduplicate callbacks; event IDs deduplicate order and inventory consumption. At-least-once delivery is not an exactly-once processing guarantee. Arrows are not node wiring or a serial call chain."
  }
}