How I Built My First Smart Contract: A Simple Voting App in Solidity

I’ve just started learning Solidity to become a smart contract developer and to finally improve my coding skills. This post shares my first project — a simple voting app written and deployed using Remix.

Project Summary

• Users can vote for a candidate.
• Each wallet can vote only once.
• Votes are stored on the blockchain.
• Smart contract written in Solidity 0.8.x

Key Features

struct Candidate {
string name;
uint voteCount;
}

We use an array of candidates and a mapping to prevent double-voting.

require(!hasVoted[msg.sender], "Already voted!");

This line ensures no address can vote twice.

What I Learned

• Solidity types and structures
• Basic contract deployment on Remix
• Using constructor() for initialization
• Importance of access control and validation

What’s Next

I plan to:

• Add a simple frontend (React + Ethers.js)
• Move to Hardhat for testing and local dev
• Explore how elections are built in real DeFi protocols