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Software architecture · Payments

Payment integration package diagram

A payment integration package diagram separates the checkout experience from payment orchestration and the external gateway. It also makes the asynchronous webhook path visible, which is important because a payment result may arrive after the original request. A ledger package records the business outcome without exposing its details to the checkout package. Use this diagram in an implementation review to check that provider-specific code stays behind an adapter and that callback handling has an explicit place.

Type Diagramme de classes UMLNorme OMG UML 2.5.1 §9–§11Moteur schematex-umlclassMis à jour 24/09/2026
Payment integration packages
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La demande

“Create a payment integration package diagram with checkout, payments, gateway, webhooks, and ledger packages and their dependencies.”

Essayez ensuiteAdd a refunds package.Change GatewayAdapter to AdyenAdapter.
Ce que contient ce dessin

Comprenez les décisions qui le sous-tendent.

01Separate orchestration

Checkout requests payment without owning gateway details.

02Contain the provider

Keep gateway calls inside an adapter package.

03Handle callbacks

Treat webhooks as a distinct inbound boundary.

04Record outcomes

Update the ledger from verified payment events.

Use to review responsibilities and dependencies before implementing payment flows.

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FAQ

Questions fréquentes

Why isolate the gateway adapter?

It keeps provider-specific requests and responses from spreading across the application.

Why show webhooks separately?

They are an inbound asynchronous flow with different verification and retry concerns.

Is this a sequence diagram?

No. It shows module dependencies, not the step-by-step timing of a payment.