Build a Trustless Lottery Platform with Smart Contracts
Design a decentralized, verifiable lottery system where all entries, draws, and winnings are handled by transparent and tamper-proof blockchain logic.Traditional lottery systems often lack transparency and can be manipulated. A blockchain-based lottery ensures provable fairness, tamper-proof rules, and automatic payouts, removing the need for a central authority.
Create a smart contract-driven lottery dApp where users buy tickets using crypto, and a verifiable random function (VRF) selects winners automatically. The contract handles entry validation, prize distribution, and transparent fund allocation.
Verifiable Random Winner Selection
Use Chainlink VRF or similar oracle to ensure provably fair and unbiased draws.
Smart Contract Prize Distribution
The contract automatically splits and sends winnings to the winner(s) with no manual intervention.
Entry Validation and Limitations
Prevent duplicate entries, bots, or capped ticket numbers through wallet-based enforcement.
On-Chain Lottery History
All draws and results are stored permanently on-chain, visible to all participants.
Users connect their wallets and purchase lottery tickets via a frontend. The smart contract stores entries and locks the prize pool. At draw time, a Chainlink VRF request returns a random number used to determine the winner. The winner receives the prize instantly.
- Solidity smart contract for entries, draw logic, and prize disbursement
- Chainlink VRF for secure, verifiable randomness
- React.js frontend with Web3 wallet integration
- Event logs for tracking every draw and payout
- Optional NFT-based ticketing for advanced features
Blockchain
Ethereum or Polygon for cost-effective draws
Smart Contracts
Solidity with Chainlink VRF integration and payout logic
Frontend
React.js + Ethers.js + Tailwind CSS for UI and ticket handling
Oracles
Chainlink VRF to generate fair and secure randomness
1. Develop Lottery Smart Contract
Handle ticket sales, prize pools, draw initiation, and winner payouts securely.
2. Integrate Chainlink VRF
Connect a secure VRF oracle to the contract for fair winner selection.
3. Build UI for Ticket Purchase and Draws
Create a responsive interface to buy tickets, view draws, and claim winnings.
4. Add Historical Draw Archive
Display past winners and draws publicly using contract event logs.
5. Simulate Testnet Draws
Deploy on testnet and simulate ticket sales, winner selection, and payouts with real wallets.
Build the Future of Fair Lotteries with Blockchain
Remove the middleman and bring provable fairness to gaming with decentralized lottery systems.
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