Blockchain Projects in Bangalore
Blockchain technology offers final-year CSE students a rare opportunity to work at the intersection of cryptography, distributed systems, and application development. A well-executed blockchain project demonstrates understanding of consensus mechanisms, smart contract design, gas optimisation, and the trade-offs between on-chain and off-chain data storage. At WeBuildPro in Bangalore, we build blockchain projects on Ethereum (Solidity + Hardhat), Hyperledger Fabric for permissioned enterprise use cases, and Polygon for low-cost deployments. Every project includes a working smart contract deployed to a public testnet, a frontend that interacts with the contract via ethers.js or web3.js, and a documented architecture explaining why blockchain was the right tool for the problem. We do not build blockchain projects for problems that a database solves better — every project we scope has a genuine need for immutability, decentralisation, or trustless execution. Common domains include supply chain provenance, academic credential verification, decentralised voting, healthcare record consent management, and NFT-based digital asset platforms. Smart contracts are tested with Hardhat and Chai before deployment. Gas costs are profiled and optimised. The project report includes a threat model covering reentrancy, integer overflow, and access control vulnerabilities.
8 Project Titles
CSEUniversities issue tamper-proof digital certificates as ERC-721 NFTs on the Ethereum Sepolia testnet. Each token's metadata — student name, degree, institution, and issue date — is stored on IPFS via Pinata, with the IPFS CID recorded on-chain. Employers verify credentials by entering a certificate ID on a React frontend that calls the smart contract's verify() function and retrieves the IPFS metadata. The system eliminates certificate forgery and reduces verification time from days to seconds. Gas cost per issuance is benchmarked at approximately 0.003 ETH on Sepolia.
A permissioned blockchain network built on Hyperledger Fabric tracks the journey of tomatoes from farm to retail shelf across four organisations: farmer, aggregator, cold-storage facility, and retailer. Each transfer event is recorded as a transaction on the ledger with GPS coordinates, temperature readings, and timestamp. Consumers scan a QR code on the product packaging to view the full provenance history on a React web app. The chaincode is written in Go and deployed on a two-peer, two-orderer network running in Docker Compose.
A blockchain-based voting system allows eligible voters to cast ballots anonymously while preventing double voting. Voter eligibility is verified off-chain by an authority that issues a cryptographic commitment. Votes are cast as Pedersen commitments on a Solidity smart contract; a zk-SNARK proof (generated with snarkjs) proves the voter is eligible without revealing identity. Results are tallied on-chain after the election closes. The system is deployed on the Polygon Mumbai testnet and demonstrated with a 50-voter simulation showing correct tally and zero double-vote incidents.
An NFT marketplace smart contract implements ERC-721 with EIP-2981 royalty standard, ensuring creators receive a 5% royalty on every secondary sale automatically enforced on-chain. The Solidity contract handles minting, listing, buying, and offer-making. A Next.js frontend connects to MetaMask, displays a gallery of listed NFTs with IPFS-hosted artwork, and allows users to mint, list, and purchase tokens. The contract is deployed on Polygon Mumbai to minimise gas costs. Hardhat tests cover 15 scenarios including reentrancy attack prevention.
Patients control access to their electronic health records through a smart contract that stores consent grants and revocations on the Ethereum testnet. Healthcare providers request access; the patient approves or denies via a mobile-friendly React app. Approved access events emit on-chain logs that create an immutable audit trail. Actual medical records are stored encrypted on IPFS; the decryption key is shared only with approved providers. The system is evaluated against HIPAA access control requirements, demonstrating compliance with the minimum-necessary access principle.
A trustless escrow system for freelance contracts is implemented as a Solidity smart contract on Ethereum Sepolia. Clients deposit payment into the contract at project start; funds are released to the freelancer upon client approval or after a dispute resolution period. A three-party arbitration mechanism allows a designated arbitrator to split funds if the client and freelancer cannot agree. The React frontend integrates MetaMask for wallet connection and displays contract state, milestones, and transaction history. Five end-to-end test scenarios cover happy path, dispute, and timeout cases.
A blockchain-based land registry records property ownership transfers as immutable transactions on a private Ethereum network (Ganache for development, Sepolia for demo). Each property is represented as an ERC-721 token; transfers require digital signatures from both buyer and seller plus a government authority node. The smart contract enforces that only the current token owner can initiate a transfer, preventing fraudulent re-registration. A React dashboard allows property search by survey number, displaying the full ownership history with timestamps and transaction hashes.
A DAO smart contract enables college club members to propose, vote on, and execute decisions — budget allocations, event approvals, and membership changes — without a central authority. Governance tokens are distributed to members based on contribution history tracked on-chain. Proposals require a 10% quorum and 60% majority to pass. Approved proposals trigger on-chain execution of fund transfers from the club treasury. The system is deployed on Polygon Mumbai and demonstrated with a simulated semester of 12 proposals, showing correct vote counting and treasury management.
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