Four in a Chain

Four in a Chain is a custom implementation of the classic "Four in a Row" game. In our implementation, users can offer a currency stake (e.g., 1 ETH) that another player has to then match. The winner receives double their original stake.

Group Hera Members

• Artem Vasilev
• Daniel Gordon Jones
• Davide Busolin
• David Pierre Sébastien Lebrec
• Euxane Célia Marie Vaz Pinto
• Turki Alahmadi

Project details

• Web server/routing using Node.js and Koa
• Web3.js to interact with the blockchain over HTTP
• All contracts wrote and compiled with Solidity
• No CIA frameworks (pure HTML/CSS/JS)

Building the project

1. First clone the project and run "npm install" to download the dependencies
2. Launch the start_testnet.sh script
3. On a new terminal launch the connect_testnet.sh script
4. (Optionally but recommended) start the miner with "miner.start(number_of_threads)"
5. In the src/ directory, run "npm start" to launch the web server (default port 8888)

Playing the game

1. Ensure MetaMask is installed with at least 2 funded accounts (you can generate funds by running the miner on the testnet)
2. Connect a wallet
3. Initialise a game (this deploys an instance of the contract and joins it with the current account)
4. Join the game with the other account
5. Make moves; each move is a transaction validated by the smart contract that has to be confirmed with the correct account
6. The winner receives the 2 ETH (currently capped) from the loser + their own 2 ETH back