Mondu Demo Integration

This repo aims to help you in setting up a demo app for Mondu BNPL. It's built with:

• NodeJS
• Express
• Pug as templating engine
• axios and fetch for async API communication
• Bootstrap 5

How To Run

git clone git@github.com:hreinberger/mondu-node.git && cd mondu-node
cp .env.example .env
nano .env
# insert your API key in the .env
npm install
npm run dev

Running in dev mode opens up a Localtunnel back to your local machine. You can get the link and your local IP from the nodeJS console. You can access the app either with the localtunnel link or via localhost:3000. The localtunnel feature is needed for redirecting you back from Mondu's hosted checkout to the app.

Bring your own API Key

In order for the app to work, wou'll have to set your Mondu API key in the .env file. Don't have one yet? Reach out to your Mondu representative!

Docker

The Repo is prepared to be run in a vscode dev container, Github Codespace or dockerized on any machine you like. To run it in a more production-like environment, you can do this:

docker compose build && docker compose up -d

⚠️ The app is not checked for vulnerabilities, so be careful when you want to run it in a public environment (like the Internet!)

Hostname

When setting an APP_HOSTNAME environment variable and running in prodcution mode (npm run prod or docker compose up -d), the app will use the set hostname for redirects.

Payment Flows

The app has support for two types of UX flows.

Hosted Checkout (Recommended)

Here, Mondu will save orders with successful hosted checkout interactions in the authorized state. The order then needs to be confirmed by the merchant with an addidtional API request.

For this flow to work, the app opens a localtunnel to your machine. Upon redirection to the success page of the app, you'll need to enter your current public IP as an anti-abuse method. The app logs the public IP to console on every start.

sequenceDiagram
    Buyer ->> Merchant: Choose Mondu payment method
    Merchant ->>+ Mondu: Create Order
    Mondu -->>- Merchant: hosted checkout URL
    Merchant -->> Buyer: Redirect to Mondu hosted checkout
    Buyer ->>+ Mondu: Interact on Mondu Hosted Checkout
    Mondu -->>- Buyer: Confirm Order
    note over Merchant,Mondu: Order in authorized state
    Merchant ->> Mondu: Confirm Order
    Mondu -->> Merchant: Order confirmed

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Confirmation Flow (Mondu Widget)

In this flow, Mondu confirms or declines an order once the buyer's interaction with the widget is complete.

sequenceDiagram
    Buyer ->> Merchant: Confirm Order ("Buy Now")
    Merchant ->>+ Mondu: Create Order
    Mondu -->>- Merchant: Order Token
    Merchant -->> Buyer: Show Widget
    Buyer ->>+ Mondu: Enrich Widget Data
    Mondu -->>- Buyer: Show Widget Response
    Mondu -->> Merchant: Webhook order/confirmed

Loading

Order Management

You can show recent orders by visiting the /orders page.

Invoices and Shipments

Orders with the confirmed state can be invoiced and shipped. This app uploads a generic invoice PDF with every invoice generation request to the Mondu API.

See routes/monduCreateInvoice.js for more details on this request.

Webhooks

You can show registered webhooks by visiting the /webhooks page.

You can register the webhooks for two topics at the moment:

• orders by clicking upon Register Order Webhook,

• invoices by clicking upon Register Invoice Webhook,

If there there other webhooks registerd for a given topic, please use Remove button to remove the endpoint and register the new one.

Remember that other applications might use the webhooks you want to remove.

To Do

✅ - Demo Checkout working

✅ - Dockerize and setup for devcontainer/Github Codespace

✅ - Mondu Confirmation- and Authorization Flow

✅ - Mondu Hosted Checkout Flow

⬜ - Order management "backend"

✅ - Invoice Workflow

✅ - Webhooks

✅ - Order status change in order overview