Space_ Polygon ID VC Verifier Server

This repo contains the server code you'll need to set up a VC (Verifiable Credential) gated website with Polygon ID. Complete local server setup below, then hook this verification server up to a frontend so you can limit access based on holding a VC that satisifies your requirements.

Server functionality

• Allows Socket.io polling to emit session specific events back to connected clients

• Generates a Query Based Request in the form of a QR code that the user can scan to prove they own a credential that satisfies certain requirements. It also specifies the callback endpoint for verification

• Reports Verification of the proof sent by the user from their Polygon ID Wallet via callback

Local server setup

1. Install server dependencies

cd server
npm i

2. Create a .env file by copying my sample

In your .env file,

cp .env.sample .env;

• Update the RPC_URL_MUMBAI to a Polygon Mumbai RPC endpoint. I used Alchemy's
• Optionally update the VERIFIER_DID to your DID
• Don't change HOSTED_SERVER_URL or FRONTEND_URL yet

3. Run your server on port 8080

npm start

4. Set up ngrok server forwarding (required!)

If you don't have ngrok already set up, install ngrok via homebrew or download. Login (I used github login) to create a free account and add your account's config token to the command line.

After ngrok is set up, start a tunnel to port 8080 to expose your server to the internet beyond only being available to your laptop on localhost:8080. This is necessary because the Polygon ID mobile wallet app will use a verfication uri you provide and needs to be able to send the verification result to this exposed public endpoint.

ngrok http 8080

You'll see a forwarding address in the logs

Forwarding  https://abc-your-forwarding-address-def.ngrok-free.app -> http://localhost:8080

5. Update the HOSTED_SERVER_URL field your .env file to your forwarding address

HOSTED_SERVER_URL="https://abc-your-forwarding-address-def.ngrok-free.app"

6. Hosting the server (optional)

You are currently running the server on localhost and forwarding to ngrok to exposse it to the internet.

If you'd like to host the server, you can use something like Render, Connect your repo, then make sure to add all your environment variables from .env. Update the HOSTED_SERVER_URL environment variable to match the server domain created by Render.