Libraries for SMART Health Cards

What are good libraries for working with SMART Health Cards

For the most part, you can implement SMART Health Cards using a library for JWS and a library for QR codes, and stitching things together from there (see below). But we do have a few examples of "swiss army knife" style libraries for SMART Health Cards:

• .NET https://github.com/angusmillar/SmartHealthCard
• Ruby https://github.com/dvci/health_cards/tree/main/
• Golang https://github.com/amitkgupta/go-smarthealthcards

What are good libraries for QR generation?

You'll need a library that supports generating multi-segment QRs, and allows control over the encoding mode for each segment. Here are some libraries that folks in the community have used:

• .NET https://www.nuget.org/packages/Net.Codecrete.QrCodeGenerator
• JS https://github.com/soldair/node-qrcode
• Java, TypeScript/JavaScript, Python, C++, C, Rust https://github.com/nayuki/QR-Code-generator

How can I debug QRs to check symbol size, error correction, etc?

• http://qrlogo.kaarposoft.dk/qrdecode.html is very helpful browser-based tool (click "Produce debug output")

What are good libraries for JWS?

You'll need a library that supports binary payloads, and not just JSON payloads. Most JWS libraries handle this, but libraries limited to JWT do not.

• JS https://www.npmjs.com/package/node-jose
• Ruby https://rubygems.org/gems/jose