Source code for QuizFrame

WARNING: Work in progress, ugly code, no warranties

Features

1. Simulates Farcaster embed locally with a form
2. Stores app's state in a URL
3. Uses @vercel/og to render images with React and Satori

Getting Started

Register a Redis database on Upstash.

Create .env.local

REDIS_URL="https://abc-xyz.upstash.io"
REDIS_TOKEN="aHVudGVyMg=="

Running locally

$ yarn
$ yarn dev

Navigate to http://localhost:3000/new and create a new Quiz, then open the Quiz at http://localhost:3000/q/example-uuid-0000

Interesting pices of code

src/pages/api/og/[props].tsx - renders the frame image based on current state. The URL contains all required serialized data, so Vercel can cache the image.

src/pages/q/[id].tsx - the main engine, using <form> to simulate Farcaster embed, handles POST requests in getServerSideProps, handles the game state in Redux style.

src/pages/new.tsx - quiz editor using spreadsheet-like interface.