Engineering and integration guides

Understand how Console, applications, financial services, and analytics connect without breaking module ownership.

Build a safe placeholder request and prove scope and idempotency before connecting an environment.

Separate local, sandbox, staging, and production; success in one environment never proves another.

Choose the correct user, device, or partner identity and keep secrets out of clients and logs.

Enforce scope in authentication, queries, policy, and tests—not merely as a UI filter.

Return an actionable error without exposing stacks, SQL, secrets, or another tenant's data.

Verify the signature before parsing, acknowledge quickly, then process through a replay-safe inbox.

Connect drafts, offline state, and sync without duplicating an order or bypassing the Sales/POS gateway.

Sync order state to kitchen display and hall surfaces through a fail-closed contract and safe local snapshot.

Scope courier permissions, replay status changes safely, and treat GPS as sensitive data.

Initiate payment through standalone LuxPay and never treat an unverified redirect or callback as settlement proof.

Ask through a governed semantic layer without sending raw SQL or bypassing scope and certified metrics.

Make replay safe by binding a key to the same operation, scope, payload, and result.

Shape traffic by contract and scope instead of sending oversized batches or synchronized retry storms.

Connect a data change to durable delivery without dual-write gaps between the database and transport.

Persist user intent locally, replay it in a governed order, and distinguish pending from confirmed state.

Apply least privilege, fail-closed behavior, and audit trails without turning an API into an owner-gate bypass.

Bind every contract to a version, deprecation window, and rollback proof instead of silent change.

Use one library per responsibility and avoid duplicating signing, sync, or storage across applications.

Test success, failure, replay, and isolation before allowing the first production request.