solsocketSocket.io for Solana

Realtime multiplayer rooms — fully onchain, powered by MagicBlock Ephemeral Rollups. ~50ms writes, zero fees, one wallet signature.

Quickstart

GitHub

⚡

~50ms, zero-fee writes

Presence, events, and shared state run on an ephemeral rollup — measured 54ms cross-client delivery, fee = 0 on every realtime transaction.

✍️

One signature, then flow

A single wallet transaction creates, joins, and delegates a room. After that an auto-managed session key signs everything — no popups, ever.

🧱

Real Solana state

Rooms and presence are ordinary accounts. Leave or close and the state commits back to the base layer, permanent and composable.

🧰

The Socket.io mental model

joinOrCreate, broadcast, emit/onMessage, listRooms — plus interpolation and roster helpers so 10Hz broadcasts render as 60fps movement.

Fifteen lines to multiplayer

import { SolSocket } from "solsocket";

const sock = SolSocket.connect({ wallet, cluster: "devnet", region: "eu" });
const room = await sock.joinOrCreate("lobby"); // same name → same room

room.onPresence(({ player, data }) => drawCursor(player, data)); // ~50ms
await room.broadcast({ x: 0.4, y: 0.7 }); // zero-fee, no wallet popup

room.onMessage("chat", ({ player, data }) => bubble(player, data));
await room.emit("chat", { text: "gm" }); // event in tx logs — no state write

bash

npm create solsocket   # scaffold a working shared-cursor app