Polygamble

Guess whether BTC/USD will be higher or lower 60 seconds from now. Each guess resolves against the Binance price once the delay has elapsed: +1 for a correct call, -1 otherwise. The score persists per (anonymous) player.

Stack

• Next.js (App Router) + React + Tailwind + tRPC + Tanstack Query
• Drizzle ORM on libSQL — a local file in dev, Turso in production
• Better Auth with anonymous sessions
• Binance for the live price (client WebSocket) and historical resolution price (REST)

Run locally

• Install nodejs (>=24) and pnpm
• Rename .env.example to .env
• pnpm install --frozen-lockfile
• pnpm dev — runs pending migrations first, then starts the dev server

Tests

• pnpm lint
• pnpm test

Deploy

• Point DATABASE_URL at a Turso database and set DATABASE_AUTH_TOKEN
• Set BETTER_AUTH_SECRET (openssl rand -base64 32) and BETTER_AUTH_URL
• pnpm db:migrate, then pnpm build and pnpm start

The server is stateless REST, so it deploys to any serverless target. The live price comes straight from Binance over a client WebSocket — no server stream to keep alive.

Schema changes

• Edit the tables in src/db/schema, then pnpm db:generate (auth tables managed by better auth pnpm auth:generate)