Core concepts
Foundational components, data models, and security patterns that power Trustly integrations.
Before building your integration, familiarize yourself with the core building blocks — from the establishData object that configures every transaction to the webhook events that drive your backend logic.
The basics
Key concepts
The A2A payment model, Trustly Lightbox, and transaction lifecycle.
The establishData object
Configure merchant credentials, transaction details, and customer data.
Frontend and UX
Frontend integration
Understand the client-server boundary, request signatures, and transaction handoff.
Redirect URLs
Configure return and cancel URLs for user redirects.
Content strings
Trustly-provided UI strings for product names and messaging.