Move Lottery

As part of Code collision Hackathon and Encode's Aptos bootcamp, the team (Dennis, Aashish and Akshar) worked on the project: Aptos Lottery. This project implements a decentralized lottery system on the Aptos blockchain using the Move programming language. The smart contract allows users to participate in a lottery by buying tickets with AptosCoin, and uses on-chain randomness to select a winner.

Key Features

1. Ticket Purchase: Users can buy lottery tickets using AptosCoin.
2. Random Winner Selection and Payout: Utilizes Aptos' on-chain randomness module for fair winner selection and pays out the prize to the winner in same transaction.
3. View Functions: Provides functions to check lottery status, prize amount, and participant count.

Technology Stack

• Blockchain: Aptos
• Smart Contract: Move
• Frontend: Next.js, React, TypeScript
• Styling: Tailwind CSS
• State Management: React Query
• Wallet Integration: Aptos Wallet Adapter

Prerequisites

• Node.js (v14 or later)
• Yarn or npm
• Aptos CLI (for contract deployment)
• An Aptos wallet (e.g., Petra, Martian)

Setup and Installation

1. Clone the repository:

   git clone https://github.com/your-username/aptos-lottery.git
   cd aptos-lottery
   

2. Install dependencies:

   cd frontend
   yarn install
   

3. Set up environment variables: Create a .env.local file in the frontend directory and add the following:

   NEXT_PUBLIC_APP_NETWORK=testnet
   NEXT_PUBLIC_MODULE_ADDRESS=your_module_address
   NEXT_PUBLIC_ADMIN_ADDRESS=your_admin_address
   

4. Start the development server:

   yarn dev
   

5. Open http://localhost:3000 in your browser to see the application.

Smart Contract Deployment

1. Navigate to the move directory.
2. Update the Move.toml file with your account address.
3. Compile and deploy the contract using Aptos CLI:

   aptos move compile
   aptos move publish
   

Usage

1. Connect your Aptos wallet to the application.
2. As an admin, create new lotteries with specified durations.
3. Users can buy tickets for active lotteries.
4. When a lottery ends, the admin can draw a winner.
5. Winners are automatically credited with the prize amount.

Project Structure

• move/: Contains the Move smart contract
• frontend/: Next.js frontend application
  • src/components/: React components
  • src/view-functions/: Functions to interact with the smart contract
  • src/entry-functions/: Functions to call smart contract entry points
  • src/constants/: Configuration constants
  • src/utils/: Utility functions

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License.