Initiating a Wallet Payment (Merchant store → DemoPSP)

This page explains how Merchant store (ECR) systems can trigger a wallet payment during checkout using Aera’s DemoPSP.

The integration simulates how a live Point-of-Sale (POS) terminal would work with the Aera Wallet Infrastructure — giving you a test environment to verify the flow between your register, the wallet, and the consumer’s app.

What This Does

When a customer chooses to pay using the Aera Wallet at checkout, the Merchant store must send a request to the DemoPSP to initiate the payment. For information about the API see API reference.

Who Should Use This

This flow is designed for:

Retailers or solution providers who want to integrate Aera Wallet support into their ECR system.
Product teams who want to test how the payment flow behaves before going live.
Non-technical stakeholders who want to understand how wallet payments are triggered at checkout.

What to Expect

The DemoPSP behaves like a real PSP, but it is only used for testing.
It will intentionally reject payments over 100 (any currency) to help simulate failure handling.
The response includes a transactionId that’s used to track the payment through the wallet flow.
You will be able to poll for updates using a transactionId returned by the transaction initialization call.
You can also call the DemoPSP to cancel a transaction.

Integration Overview

Here’s what typically happens:

Customer is identified in-store (e.g. by scanning a QR code)
ECR sends payment request to the DemoPSP
Customer approves payment in their app (Wallet SDK)
Wallet signs the transaction
Result is sent to the callback URL you provided

This lets your register know the final result before the transaction is marked as completed in-store.

What’s Required

See exact field definitions in the API reference .

After Integration

Once you’ve integrated with this flow:

You’ll be able to test payment scenarios before going live.
Your ECR will know how to trigger the wallet payment flow.
The transaction can be linked to your internal order system using the provided transactionId

Need Help?

Not sure how to structure your ECR integration? Reach out to your Aera business contact.