RPS

Rock Paper Scissors on Nostr with commit-reveal.

How It Works

1. CREATE: Player A creates game, gets game ID
2. JOIN:   Player B joins with game ID
3. COMMIT: Both players commit hash(move + salt)
4. REVEAL: Both players reveal move + salt
5. VERIFY: Hashes verified, winner determined

No cheating possible - you commit before you see opponent's move.

Play

npm install
npm start
# Open http://localhost:3000

Or just open index.html directly.

Protocol

Game Events (Kind 30334)

{
  "kind": 30334,
  "tags": [["d", "rps:abc123"], ["t", "rps"]],
  "content": {"type": "create", "creator": "<pubkey>"}
}

Move Events (Kind 30335)

Commit:

{
  "kind": 30335,
  "tags": [["g", "rps:abc123"], ["t", "rps-move"]],
  "content": {"type": "commit", "hash": "sha256(move:salt)"}
}

Reveal:

{
  "kind": 30335,
  "tags": [["g", "rps:abc123"], ["t", "rps-move"]],
  "content": {"type": "reveal", "move": "rock", "salt": "x7k2..."}
}

Why Commit-Reveal?

If you just broadcast your move, opponent sees it and picks the winning counter.

With commit-reveal:

1. You commit hash("rock" + "randomsalt")
2. Opponent commits their hash
3. Neither can change (hash is published)
4. Both reveal - hashes verified
5. Fair game!