Open-source licences

KAI-Pay is built on open-source software. These components remain under their own licences, mostly permissive ones such as MIT and Apache-2.0. Here you find the complete licence notices for every part of KAI-Pay: name and version of each component, the licence applied, the licence text and the copyright notices.

The lists are regenerated whenever the libraries change; their date is stated at the top. The rights we grant you are set out in the terms of use, section 13.

Wallet (web app)

app.kai-pay.net – complete list: wallet licence notices.

In the wallet: Menu → Legal → Open-source licences or Settings → Legal → Open-source licences. It shows the same list.

Android app “KAI-Pay Beta”

The app contains the web wallet plus Android libraries, including Capacitor Android, Apache Cordova, AndroidX and Kotlin. In the app, Menu → Legal → Open-source licences shows the wallet list and, from version 0.3.1, the Android libraries as well. The Android libraries are also listed here: licence notices of the Android libraries (KAI-Pay Beta).

Android app “KAI-Pay” (web app in a Chrome frame)

This app opens the web wallet in Chrome. The wallet list above applies to the wallet; the app itself contains Android libraries, including Android Browser Helper, AndroidX, Guava and Kotlin: licence notices of the Android libraries (KAI-Pay).

Point of sale

kasse.kai-pay.net – complete list: point-of-sale licence notices. In the point of sale: footer → Open-source licences.

Payment-link pages

Our server creates the QR codes of the payment-link pages (kai-pay.net/@name) with qrcode-generator (MIT, github.com/kazuhikoarase/qrcode-generator).

This website

The other pages of kai-pay.net contain no third-party open-source components: no JavaScript, no external fonts (your device's system fonts are used), and the icons are drawn by us.