zkRPS 🪨📜✂️

A simple rock-paper-scissors commit reveal scheme game built on dojo

Install

To install Dojo, use the following commands:

1. Follow the instructions at https://book.dojoengine.org/getting-started/installation.html to install Dojo.

Usage

Once Dojo is installed, follow these steps:

1. Run Katana: katana --seed 0 --allow-zero-max-fee
2. Build the game: sozo build
3. Deploy the game to Katana: sozo migrate (you will need to comment out the World address in Scarb.toml, then once deployed uncomment)
4. Create a game: sozo execute CreateGame --calldata 3
5. Open another terminal and navigate to the player_two directory
6. Join the game as player two: sozo execute JoinGame --calldata 0
7. In the original terminal, commit your Poseidon hash: sozo execute Commit --calldata=0,214585235161475357424179868697593518496576949055548172335309505920954063106
8. In the player_two terminal, commit your move: sozo execute Commit --calldata=0,3165026789427940773000938179506358876317298524448703329726057549612803596036
9. Reveal player 1's move: sozo execute Reveal --calldata=0,12345,1
10. Reveal player 2's move: sozo execute Reveal --calldata=0,12345,2

The Game

Create a game with any number of rounds. Once a game is created a challenger can join. Once this happens the game can begin.

1. Each player submits a poseidon hash of their move along with a secret via the Commit system
2. Once both moves have been submitted, each player can reveal their move via the Reveal system, which checks the hash
3. Once revealed anyone can call the Resolve which will complete the round