Snarkjs-based Trusted Setup Phase 2 MPC

Setting up environment

Node.js

1. Install Node.js version 14

   $ nvm install 14

Firebase

1. Install firebase tools

   $ npm i -g firebase-tools

2. Save the Firebase configuration obtained from Firebase console as config/firebaseConfig.js. The content should look something like:

   // For Firebase JS SDK v7.20.0 and later, measurementId is optional
   const firebaseConfig = {
     apiKey: "...",
     authDomain: "...",
     databaseURL: "...",
     projectId: "...",
     storageBucket: "...",
     messagingSenderId: "...",
     appId: "...",
     measurementId: "...",
   }

3. Similarly save the Firebase private key file from Firebase console as config/serviceAccountPrvkey.json. The content should look something like:

   {
      "type": "service_account",
      "project_id": "zkcream",
      "private_key_id": "...",
      "private_key": "...",
      "client_email": "...",
      "client_id": "...",
      "auth_uri": "...",
      "token_uri": "...",
      "auth_provider_x509_cert_url": "...",
      "client_x509_cert_url": "..."
   }

4. In repository root directory, run:

   $ ./deploy-firebase-config.sh

5. Create OAuth application in GitHub and using the id and secret, set up Firebase GitHub authentication.

6. Login to firebase (if haven't logged in yet)

   $ firebase login

CORS

1. Install gstool (https://cloud.google.com/storage/docs/gsutil_install?hl=ja#deb)

2. Set up CORS for the default bucket e.g.

   $ gsutil cors set cors.json gs://zkcream.appspot.com

Setting up ceremony

Refer to admin package

Setting up application

1. Install dependencies

   $ npx lerna bootstrap

2. Update ceremony config file packages/client/config/default.ts

3. build client and deploy

   $ cd packages/client
   $ npm run build
   $ npm run deploy

Opening application

Open https://[project id].web.app in browser

Snarkjs included in this repository

A slightly modified version of Snarkjs 0.4.6 that can run zkey functions on web browsers is included