3rd YearAdvancedBlockchain 10-12 weeks
Blockchain-Based Voting System
A transparent, tamper-proof digital voting system built on a private Ethereum blockchain ensuring voter anonymity, vote integrity, and publicly verifiable results.
SolidityEthereum (Hardhat)Reactethers.jsIPFSMetaMask
Find GitHub repos & source code →How to build it step by step
- 1Smart Contract: Write Voting.sol: addCandidate(), giveRightToVote(), vote(), and getResults() with one-vote enforcement
- 2Voter Privacy: Use zero-knowledge proofs (or commit-reveal scheme) to separate voter identity from vote content
- 3Frontend: React + ethers.js to read contract state, call transactions, listen to VoteCast events
- 4Deployment: Deploy to Hardhat local testnet first, then Sepolia testnet; document gas costs
Key features to implement
- ✓Immutable vote records on-chain
- ✓Voter eligibility verification by admin
- ✓Real-time vote tally from blockchain events
- ✓Voter receipt with transaction hash for verification
- ✓Admin panel for election configuration
💡 Unique twist to stand out
Implement "Ranked Choice Voting" (preferential voting) in the smart contract where voters rank all candidates 1-N, and the Instant-Runoff Voting algorithm runs on-chain to determine the winner.
🎓 What you'll learn
Smart contract development, blockchain fundamentals, cryptographic voting protocols, and dApp development.