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Home»ADOPTION NEWS»Develop a decentralized voting Dapp using Linea’s zkEVM
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Develop a decentralized voting Dapp using Linea’s zkEVM

By Crypto FlexsOctober 16, 20243 Mins Read
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Develop a decentralized voting Dapp using Linea’s zkEVM
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Jessie A. Ellis
October 16, 2024 07:40

Walk through building a decentralized voting application using Linea’s zkEVM. Learn about deploying smart contracts, frontend integration, and ensuring secure and transparent voting.





In the evolving world of blockchain technology, decentralized applications (dApps) offer innovative solutions that are secure, verifiable, and tamper-proof. One such application is decentralized voting, which promises to improve democratic processes by eliminating intermediaries and ensuring transparent vote counting. According to linea.mirror.xyz, this tutorial walks you through developing a simple voting dApp using Linea, a zkEVM layer 2 blockchain solution.

Understanding Voting Dapp Architecture

The voting dApp consists of three main components: smart contracts, smart contract integration, and front-end interface. Smart contracts manage essential functions such as registering candidates, voting, enforcing the one-vote-per-wallet policy, and managing the voting period. This ensures that the voting process is secure and transparent, and all votes are recorded on the blockchain.

The front-end interface allows users to interact with the application by voting and checking the remaining voting period. Clear, responsive design encourages user engagement and builds trust in the voting process. To facilitate seamless interaction with the Linea blockchain, we use tools like the MetaMask SDK and libraries like Wagmi to allow users to sign transactions directly from their web browser.

Preferences

Start by setting up your development environment using Consensys’ Create Web3 Template CLI, which creates a monorepo structure containing both front-end and back-end components. This streamlined setup helps with efficient development and maintenance of dApps.

Write a smart contract

Smart contracts written in Solidity form the backbone of the voting system. It initializes with an array of candidate names, sets voting start and end times, and includes the ability to add candidates, vote, and retrieve voting results. The contract tracks voter addresses, ensuring each user can vote only once, and maintains a record of all votes on the blockchain.

Smart contract deployment

Smart contract deployment involves using Hardhat Ignition. After compiling your contract, ensure that your .env file is updated with required environment variables, such as your Infura API key and your account private key. Deploy your contract to the Linea testnet using the specified command and keep the contract address secure for frontend integration.

Front-end integration

Integrate the frontend with Next.js and Shadcn UI. Set up MetaMask SDK and Wagmi for wallet integration and blockchain communication. Define contract constants, including contract address and ABI, for smart contract interaction. We’ll implement React components and hooks to manage state, connect to wallets, and interact with smart contracts to allow users to vote and view candidate information.

Improved Voting Experience

The voting dApp provides a user-friendly interface that allows users to vote safely and transparently. Future improvements may include additional features such as voter registration, voting delegation, and improved security measures. The potential for decentralized applications is enormous, and voting systems are just one impactful use case.

Image source: Shutterstock


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