Verifiable Credentials URI Specification Documentation

[ChakshuGautam]

I was looking at the existing open source VC to QR Code implementation and found this whitepaper - https://github.com/Path-Check/paper-cred. They included COWIN as a example as well - https://github.com/Path-Check/paper-cred/blob/main/payloads/cowin.1.md

I found this to be a really exhaustive for a leaner data representation than JSON. I have a fair bit of understanding on how RC is doing this but failed to find a similar doc. Does the Sunbird VC provide a similar doc for the QR code generation? Would love to contribute on the docs front for this.

[pramodkvarma]

I don't think RC has taken an opinionated position, but, as I understand we have implemented few options (documentation may be missing). In addition, we can also align PathCheck as an option for adopters. But adopters may choose other libraries as well.

@dileepbapat @tejash-jl can you help?

[gamemaker1]

Thanks a lot, I have joined the channel and will read through all the messages today!

[gamemaker1]

Hi,

Here is a small update as to what I have done so far.

Thanks a lot to @amarts and @smohan-dw for the excellent introduction to CORD, it really helped me get started and cleared a few of my initial doubts. Thank you to @ChakshuGautam for helping me understand the credential verification process.

I have followed a couple of tutorials related to substrate (such as this one regarding setting up pallates) and have played around with the demos in the dhiway/cord.js repo related to verifiable credentials, that have helped me understand CORD and the SDK better. [On a separate note, @amarts @smohan-dw if there are any open issues/todos/features in the CORD repos, I would like to help out]

Here is my proposal to integrate CORD into the Sunbird RC verifiable credentials flow:

• extend the credential issuer module to hash the credential and add it to a stream on the blockchain.
• extend the verification UI to verify the certificate by checking for the hash on the chain.

Please let me know if there is anything you would change/improve in the above proposal.

I would love to work on this with all of you.

Thank you,
Vedant

[smohan-dw]

The integration proposal looks good to me. Happy to support the integration efforts.

We are moving the CORD demos to the cord-demo-scripts repository to make it easy to get the journey started. The goal of this repo is to have scripts that will help developers to get started with various scenarios using the pre-defined schemas and verifiable credentials.

How about adding issues focused on creating demo scripts using the DESP schemas?

[gamemaker1]

Hi everyone,

Sorry for the delay in implementing the integration. I have completed the first step in the proposal:

• extend the credential issuer module to hash the credential and add it to a stream on the blockchain.

and have created a PR for the same: #152. Please do review the PR and let me know if I should make any changes.

Thanks a lot @amarts and @smohan-dw for quickly answering so many of my questions on the CORD Discord server.

[pramodkvarma]

This is amazing @gamemaker1 👏👏👏! Btw, is there a design wiki page or something you can share? Does this implementation abstract the specific blockchain aspects and can plug into any blockchain? Is there an abstraction layer? If not, I strongly suggest we create that.