How to Build a Multiplayer Tic-Tac-Toe Game with Solana Wallet...

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Introduction

In this comprehensive tutorial, we'll create a web-based Tic-Tac-Toe game with real-time multiplayer functionality and Solana wallet integration. This project will allow players to connect their Solana wallets, find opponents, and play games with the option to record results on the blockchain.

Features

Real-time multiplayer Tic-Tac-Toe
Solana wallet authentication
Game lobby system
On-chain game history (optional)
Winner payouts (optional)

Tech Stack

Frontend: React + TailwindCSS
Blockchain: Solana Web3.js + Devnet
Wallet: Phantom + Solana Wallet Adapter
Realtime Communication: Firebase Realtime Database
Backend: Firebase Functions (optional Express alternative)

Setup Instructions

Prerequisites

Node.js (v16 or later)
Yarn or npm
Phantom Wallet (or other Solana wallet)
Firebase account (free tier sufficient)
Basic understanding of JavaScript and React

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Step 1: Initialize the Project

npx create-react-app solana-tic-tac-toe --template typescript
cd solana-tic-tac-toe
yarn add @solana/web3.js @solana/wallet-adapter-react @solana/wallet-adapter-react-ui @solana/wallet-adapter-wallets @solana/wallet-adapter-base firebase @chakra-ui/react @emotion/react @emotion/styled framer-motion
yarn add -D tailwindcss postcss autoprefixer
npx tailwindcss init -p

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Step 2: Configure TailwindCSS

Update tailwind.config.js:

module.exports = {
  content: [
    "./src/**/*.{js,jsx,ts,tsx}",
  ],
  theme: {
    extend: {},
  },
  plugins: [],
}

Add to src/index.css:

@tailwind base;
@tailwind components;
@tailwind utilities;

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Step 3. Firebase Setup

Create a new Firebase project and enable:

Realtime Database Authentication (anonymous or email/password)

Add your Firebase config to src/firebase.ts: import { initializeApp } from 'firebase/app' import { getDatabase } from 'firebase/database' const firebaseConfig = { apiKey: "YOUR_API_KEY", authDomain: "YOUR_AUTH_DOMAIN", databaseURL: "YOUR_DATABASE_URL", projectId: "YOUR_PROJECT_ID", storageBucket: "YOUR_STORAGE_BUCKET", messagingSenderId: "YOUR_SENDER_ID", appId: "YOUR_APP_ID" }; const app = initializeApp(firebaseConfig) const database = getDatabase(app) export { database }

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Step 4. Wallet Integration

Create src/components/WalletContextProvider.tsx: import React, { useMemo } from 'react' import { WalletAdapterNetwork } from '@solana/wallet-adapter-base' import { WalletModalProvider } from '@solana/wallet-adapter-react-ui' import { ConnectionProvider, WalletProvider } from '@solana/wallet-adapter-react' import { PhantomWalletAdapter } from '@solana/wallet-adapter-wallets' import { clusterApiUrl } from '@solana/web3.js' require('@solana/wallet-adapter-react-ui/styles.css') export const WalletContextProvider = ({ children }: { children: React.ReactNode }) => { const network = WalletAdapterNetwork.Devnet const endpoint = useMemo(() => clusterApiUrl(network), [network]) const wallets = useMemo(() => [new PhantomWalletAdapter()], []) return ( {children} ) }

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Step 5. Game Components

Create src/components/GameBoard.tsx:

import React from 'react' type BoardProps = { board: string[] onCellClick: (index: number) => void disabled: boolean }

export const GameBoard = ({ board, onCellClick, disabled }: BoardProps) => {
  return (
    <div className="grid grid-cols-3 gap-2 w-64 h-64 mx-auto">
      {board.map((cell, index) => (
        <button
          key={index}
          onClick={() => onCellClick(index)}
          disabled={disabled || !!cell}
          className="flex items-center justify-center text-4xl font-bold bg-gray-200 hover:bg-gray-300 rounded-lg h-20 w-20"
        >
          {cell}
        </button>
      ))}
    </div>
  )
}

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Step 6: Multiplayer Logic

Create src/hooks/useGame.ts for game state management: import { useState, useEffect } from 'react' import { ref, onValue, set, push, update } from 'firebase/database' import { database } from '../firebase' import { useWallet } from '@solana/wallet-adapter-react' type GameState = { board: string[] currentPlayer: 'X' | 'O' winner: string | null playerX: string | null playerO: string | null } export const useGame = (gameId?: string) => { const { publicKey } = useWallet() const [gameState, setGameState] = useState({ board: Array(9).fill(''), currentPlayer: 'X', winner: null, playerX: null, playerO: null }) const [isLoading, setIsLoading] = useState(true) const [isPlayer, setIsPlayer] = useState(false) const [playerSymbol, setPlayerSymbol] = useState<'X' | 'O' | null>(null) // Game logic implementation here // Including Firebase realtime updates, move validation, etc. return { gameState, isLoading, isPlayer, playerSymbol, makeMove: (cellIndex: number) => { // Implement move logic }, createGame: async () => { // Implement game creation }, joinGame: async (gameId: string) => { // Implement game joining } } }

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Step 7: Main App Component

Update src/App.tsx: import React from 'react' import { WalletContextProvider } from './components/WalletContextProvider' import { WalletMultiButton } from '@solana/wallet-adapter-react-ui' import { useGame } from './hooks/useGame' import { GameBoard } from './components/GameBoard' function App() { const { gameState, isLoading, isPlayer, playerSymbol, makeMove, createGame, joinGame } = useGame() if (isLoading) return

Loading...



  return (
    
      
        Solana Tic-Tac-Toe
        
      

      
        {!gameState.playerX || !gameState.playerO ? (
          
            
            
              
              
            
          
        ) : (
          
            
              {gameState.winner ? (
                
                  {gameState.winner === 'draw' 
                    ? "It's a draw!" 
                    : `${gameState.winner} wins!`}
                
              ) : (
                
                  Current turn: {gameState.currentPlayer}
                  {isPlayer && ` (You're ${playerSymbol})`}
                
              )}
            
            
          
        )}
      
    
  )
}

export default function WrappedApp() {
  return (
    
      
    
  )
}

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Step 8: On-Chain Integration (Optional)

Create src/utils/solana.ts for blockchain interactions: import { Connection, PublicKey, Transaction, SystemProgram } from '@solana/web3.js' const connection = new Connection('https://api.devnet.solana.com') export const recordGameResult = async ( winner: PublicKey, loser: PublicKey, amount: number ) => { const transaction = new Transaction().add( SystemProgram.transfer({ fromPubkey: loser, toPubkey: winner, lamports: amount }) ) // In a real app, you'd sign and send this transaction properly return transaction } export const getGameHistory = async (player: PublicKey) => { // Implement fetching game history from your on-chain program return [] }

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Deployment

1. Build the React App

yarn build

2. Deploy to Firebase Hosting

yarn add -D firebase-tools
firebase login
firebase init
# Select Hosting and follow prompts
firebase deploy

Forums

How to Build a Multiplayer Tic-Tac-Toe Game with Solana Wallet Integration

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Step 1: Initialize the Project

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Step 2: Configure TailwindCSS

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Step 3. Firebase Setup

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Step 4. Wallet Integration

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Step 5. Game Components

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Step 6: Multiplayer Logic

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Step 7: Main App Component

Solana Tic-Tac-Toe

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Step 8: On-Chain Integration (Optional)

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Deployment

1. Build the React App

2. Deploy to Firebase Hosting