🗳️ Voting DApp with Secret Voting, Whitelist, and Token-Based Voting

This smart contract project implements a modular decentralized voting system with advanced features designed for fairness, security, and flexibility.

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✨ Features

• ✅ Whitelist System
  Only approved (whitelisted) addresses are allowed to participate in the voting process.

• 🔐 Secret Voting
  Uses a commit-reveal mechanism to protect vote confidentiality. Users first commit a hash of their vote and later reveal it along with a secret.

• 🎫 Token-Based Voting (Optional)
  Voters can use ERC-20 tokens to cast weighted votes. The more tokens they hold (or approve), the more influence they have.

• 👑 Admin Controls
  The contract owner can:

  • Set the voting time window.
  • End the voting process manually.
  • Add whitelisted addresses.

• 👥 Multiple Candidates
  Supports a list of candidates, stores votes securely, and calculates winners automatically — including in case of tie.

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🛠️ How to Use

1. Deploy the contract with a list of candidate names.
2. Set voting time (optional if default time is set in constructor).
3. Add voters to the whitelist via the admin.
4. Users commit their vote using commitVote(candidateId, salt).
5. During the reveal phase, users call revealVote(candidateId, salt) to confirm their vote.
6. Admin or anyone can query vote counts and fetch winner(s).

🔁 Token Voting (if using TokenVoting contract)

1. The voter approves the contract to use their tokens:

   await token.approve(tokenVoting.address, amount);

2.Then votes are counted based on token balance or transferred for security (depending on contract version).

3.Token-based votes are tallied with weight.

🔧 Technologies Used

Solidity ^0.8.20

Remix IDE (for writing and testing)

OpenZeppelin Contracts (Ownable, ERC20 interfaces)

Ethereum-compatible blockchain (Hardhat / Remix / Ganache / etc.)

📁 Modules Structure

This DApp is modularized for better separation of concerns:

WhitelistModule.sol – Handles whitelist management.

SecretVotingModule.sol – Manages commit-reveal logic.

TokenVoting.sol – Optional contract for ERC-20 based voting.

BasicVoting.sol – Main contract using SecretVoting + Whitelist (non-token-based).

📄 License

This project is licensed under the MIT License.