Berry Fast

An infinite collaborative pixel drawing board on NEAR Protocol. Free to draw.

Website: https://berry.fast API: https://api.berry.fastnear.com Contract: berryfast.near

Components

• Contract (contract/) — Minimal NEAR smart contract with a single draw() method. Exists only so transactions can be sent; the indexer reads args directly from chain data.
• Indexer (backend/indexer/) — Streams blocks from NEAR via fastnear-neardata-fetcher, filters draw calls, validates pixel JSON, and pushes events to a Valkey queue.
• Server (backend/server/) — Axum HTTP/WebSocket server. Consumes draw events from the queue, applies ownership rules, updates region blobs in Valkey, and broadcasts live updates.
• Frontend (frontend/) — Vite/React app. Full-viewport canvas with Google Maps-style pan/zoom, NEAR Wallet Selector for signing transactions, and IndexedDB caching.

Rules

• Anyone can draw on an undrawn pixel
• Anyone can draw on top of another pixel for 1 hour (it resets the timer)
• After 1 hour the pixel becomes permanent

Documentation

• API.md — Full API reference (HTTP endpoints, WebSocket protocol, data formats)
• skill.md — Agent-readable skill file describing how to interact with Berry Fast programmatically